Evaporation and Concentration

Battery Material Industry

Battery Material Industry

The rapid growth of the battery industry has led to increased demand for essential materials like cobalt sulfate, nickel sulfate, manganese sulfate, and Li2CO3. Evaporation and crystallization technologies are pivotal in the production process, directly impacting material quality and battery performance.

For Li2CO3 and lithium hydroxide production, lithium sulfate extracted from lithium spodumene and lithium mica undergoes evaporation concentration before precipitating Li2CO3. Both crude and refined lithium hydroxide also require evaporation and crystallization. The final stages of nickel sulfate, cobalt sulfate, and manganese sulfate production involve evaporation and crystallization.

Mechanical Vapor Recompression (MVR) technology stands out for its energy efficiency and advantages in evaporative crystallization. Proper use of MVR evaporation ensures effective salt solution evaporation and crystallization for various battery materials. Compared to traditional methods, MVR evaporation offers significant energy savings, stability, and automation.

Power Battery Recycling Industry

Power Battery Recycling

As the demand for lithium-ion power batteries grows, so does the need for efficient recycling to recover valuable materials like lithium, cobalt, and nickel. Myande Group offers advanced equipment and technology for the battery recycling industry, including MVR (Mechanical Vapor Recompression) evaporation and crystallization, multi-effect evaporation, and cooling crystallization technologies. Our comprehensive solutions are designed to enhance the efficiency and effectiveness of the recycling process, ensuring the highest recovery rates of valuable metals and materials.

Industrial Wastewater Treatment

Industrial Wastewater Treatment

Myande Group stands at the forefront of providing comprehensive solutions for the resource recovery and treatment of industrial wastewater. With our expertise in evaporation crystallization technologies, we offer tailored solutions to address the challenges of salt separation and recovery in wastewater treatment. Our advanced equipment and technologies enable efficient concentration, crystallization, and separation of salts from wastewater streams, ensuring high purity and quality of recovered salts.

Amino Acid Production Industry

Amino Acid Production

Leveraging our robust R&D capabilities and extensive industry experience, Myande's solutions are designed to optimize the entire evaporation and crystallization process, minimizing energy consumption while maximizing product quality. Our advanced evaporation technology significantly enhances the efficiency and purity of amino acid extraction and adapts to the specific needs of different amino acid products. This ensures that heat-sensitive components remain intact during the crystallization process, preserving the biological activity of the amino acids.

Through the integration of intelligent control and automation systems, Myande's solutions enable precise management of the production process, enhancing both flexibility and stability. This paves the way for amino acid manufacturers to achieve high-efficiency, sustainable production, meeting the growing demands of the market.

Erythritol Production Industry

Erythritol Production Industry

Myande's MVR evaporation and concentration, along with crystallization solutions, are tailored specifically for the polyol industry. These solutions ensure high purity and quality crystallization of erythritol while significantly improving production efficiency. By precisely controlling temperature and pressure, our technology effectively prevents the degradation of heat-sensitive components, preserving the natural attributes and health benefits of erythritol. This meets the market demand for low-sugar, low-calorie, and high-nutritional-value products.

Food and Beverage Industry

Food and Beverage Industry

Myande Group offers MVR evaporation and crystallization technologies tailored for the food and beverage industry. Our solutions ensure efficient concentration and purification of ingredients, as well as treatment of wastewater discharged from production process, enhancing product quality and sustainability.
-Dairy Production
-Fruit Juice Production
-Edible Oil Production
-Food Processing
-Sugar from Beets and Cane
-Wine Production
-Distilling & Beer Production

Solution Tailored to Your Needs

General Layout Plan

With a land prepared, the next thing you should consider is planning the general layout, which is a crucial foundation of a sustainable and cost-effective manufacturing.
Turn to us for help and we will present you the design for your plant by considering water, steam, electricity supply and etc.

Process Design

Combining our engineering expertise, industry know-how and practical skills with your knowledge, we provide the optimized and customized process design for your plant.

3D Plant Design

On the basis of plant layout design, combined with real situation, we can design a three-dimensional model of the entire plant. All the equipment, piping and instruments, any detail can be shown in the model, not only allowing you to have an intuitive understanding of the plant, but also providing overall information support for plant construction, equipment installation and future expansion.

Automatic Control System

We offer economical and most effective process automation solutions for the entire production line. Our RES automatic control system is developed based on PLC/DCS system.

Data Integration

From the perspective of the overall operation of the factory, Myande intelligent data integration management system collects basic data from raw grain procurement, warehousing, processing, inventory, sales and logistics, relying on the interconnection network system of each workshop. It provides real-time, accurate and traceable data reports for the current storage, processing and shipping.

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We owns in-house manufacture base of more than 120,000㎡ integrating R&D, production, project management which represents advanced engineering capability in the industry.

Installation and Commissioning

After finishing the installation of all machines, we offer on-site commissioning service to ensure compatible functioning.
Every move of the machine needs strong technical support from our experienced engineers. The only principle is that you can start manufacturing right after the commissioning.

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Myande 360° Service Portfolio covers all your needs throughout the life cycle of your project. By minimizing your total cost of ownership, we help you stay ahead of the competition.

About Myande

Myande Group is a globally leading supplier of complete plants, equipment, and services for Oils & Fats, Starch & Derivatives, Fermentation, Evaporation & Crystallization, Material Storage and Handling and Smart Factory industries.

Myande Group currently has 1,000+ employees including 400 technical staff and 600 manufacturing workers. More than 1,000 complete plants have been supplied under Myande’s name in around 80 countries since 2003.

World-leading manufacturing base

In-house manufacture base of more than 130,000㎡ that integrates R&D, production, and project management, representing world-class engineering capability in the industry.

Myande Evaporator under Fabrication

Intelligent Tube Sheet Robot Welding System

By harnessing the power of the Intelligent Tube Sheet Robot Welding System, we have revolutionized the way evaporators are crafted, taking efficiency and precision to unprecedented heights.

At the core of our remarkable evaporator lies the Intelligent Tube Sheet Robot Welding System, a state-of-the-art technology that has redefined the welding process. By automating this intricate task, we eliminate the margin for human error, ensuring flawless connections between tubes and sheet metal. The result is an impeccable product that exceeds industry standards.

No Compromise on Quality

We are highly committed to Quality Assurance.

Our facilities and processes adhere to the highest local and international industry standards and certifications and are audited regularly for compliance.

With a global quality management system, we ensure that our customers all over the world receive high-quality, reliable products and solutions. We are well aware that our equipment have to function safely and efficiently for decades.

To effectively carry on the spirit of artisanship, improve the overall quality of front-line employees, we hold the “Workmanship Skills Competition" every year.

Certificates & Patents

At Myande​, innovation is the result of the total process of developing an idea into a product or a new way of working which adds value to the business.
Over 400 registered patents and utility models demonstrate the company's innovation potential.

Our Global Presence

We focus on supplying one-stop engineering service covering general layout plan, process design, R&D, equipment manufacturing, automatic control system, data integration, installation, supervision, commissioning, training and etc.
Our custom solutions come from a deep understanding of your needs, and we have the capability to complete each project from the design of the initial concept to manufacturing, installation, commissioning and delivery.

Lifecycle Service

Technical expertise and innovative products form the basis of your success. But we offer you even more: our extensive range of services gives you optimum support for your requirements and objectives in the long term.

Myande News & Insights

How to know if your industrial shell tube evaporator is clogged?

Imagine this: your production line suddenly slows down, energy bills spike, and product quality plummets. The culprit? A clogged evaporator. This is not just an inconvenience; it's a significant threat to your efficiency, product consistency, and profitability. If left unchecked, a clogged evaporator can lead to extended downtime, costly repairs, and substantial financial losses. The frustration and stress of frequent breakdowns can be overwhelming, but there's a way to address this issue head-on. Signs of a Clogged Evaporator Recognizing the symptoms of a clogged or fouled shell and tube evaporator early can save you time and money. Here are the key indicators: 1. Decreased Evaporation Rate: When your evaporator is clogged, the flow of feed liquid over the heat transfer surfaces is restricted. This reduction in flow rate directly impacts the overall evaporation rate and throughput of the system. If you notice a decline in your evaporator's performance, it might be due to clogging. 2. Increased Pressure Drop: As fouling builds up on the tube surfaces, it creates flow restrictions, leading to an abnormal increase in pressure drop across the evaporator. Monitoring the pressure differential can help identify this issue. 3. Poor Heat Transfer: Fouling deposits act as an insulating layer, reducing heat transfer efficiency. This can be detected by uneven temperature distribution or localized hot spots on the evaporator surface. Reduced heat transfer can significantly affect the efficiency of your process. 4. Frequent Cleaning Required: If you find yourself needing to perform chemical cleaning cycles more frequently, such as acid cleaning, to maintain performance, it is a clear sign of fouling buildup. This indicates that your evaporator is not functioning optimally and requires more attention. 5. Visible Scaling/Fouling: If you can visually inspect the evaporator tubes and the shell side, look for the buildup of scales, precipitates, or fouling deposits. Visible signs of scaling are a direct indicator of clogging and fouling. 6. Inconsistent Product Quality: Clogging can lead to uneven liquid distribution and heating, resulting in inconsistent concentration or quality of the evaporated product. Variations in product quality are a significant red flag indicating problems within the evaporator. 7. Increased Energy Consumption: As fouling increases, more energy is required to compensate for the poor heat transfer, leading to higher utility costs. If you notice a sudden increase in energy consumption without a corresponding increase in production, it could be due to a clogged evaporator. Regular monitoring of key performance parameters like flow rates, temperatures, pressures, and energy consumption is crucial for early detection of evaporator clogging. Implementing a preventive maintenance schedule based on the nature of the feed stream can help mitigate fouling issues and keep your evaporator running efficiently. Understanding the symptoms of a clogged evaporator is just the beginning. To maintain optimal performance and avoid costly downtime, it's essential to know how your evaporator works and how to clean it effectively. By delving deeper into the operation and maintenance of shell and tube evaporators, you can ensure your equipment remains in top condition, providing reliable and efficient service. How Does a Shell and Tube Type Evaporator Work? A shell and tube type evaporator is a specific configuration of a shell and tube heat exchanger used for evaporation processes. Here's a detailed look at how it works: Basic Structure1. Tube Bundle: The evaporator consists of a bundle of tubes enclosed within a cylindrical shell.2. Fluid Flow: The fluid to be evaporated (feed liquid) flows through the tubes, while the heating medium (steam, hot fluid, etc.) flows over the outer surface of the tubes within the shell. Flow Arrangement1. Feed Liquid Entry: The feed liquid enters the tube bundle through an inlet nozzle in the tube sheet at one end.2. Flow Through Tubes: The feed liquid flows through the tubes, where it is heated and partially/fully evaporates.3. Exit of Vapor and Liquid: The vapor and any remaining liquid exit through an outlet nozzle at the other end of the tube bundle.4. Heating Medium Flow: The heating medium enters the shell through an inlet nozzle, flows across the tube bundle in a specific pattern aided by baffles, and exits through an outlet nozzle. Heat Transfer Process1. Heat Transfer: Heat is transferred from the hot heating medium to the cooler feed liquid through the tube walls.2. Evaporation: As the feed liquid flows through the tubes, it absorbs heat, causing a portion of it to vaporize (evaporate).3. Evaporation Factors: The degree of evaporation depends on factors like the heat transfer area, flow rates, and temperature differences. Multi-Pass Design1. Efficiency Improvement: To increase heat transfer efficiency, the tube bundle can be designed for multiple passes, where the fluid makes multiple passes through different sections of the tube bundle.2. Heat Transfer Length: This increases the effective heat transfer length and improves evaporation rates. Baffles and Tube Arrangements1. Flow Direction: Baffles are installed in the shell to direct the flow of the heating medium across the tube bundle and induce turbulence, enhancing heat transfer.2. Tube Patterns: Tube arrangements like triangular or rotated square patterns are used to optimize heat transfer and fluid flow.Shell and tube evaporators are widely used in various industries, such as chemical processing, lithium extraction, food and beverage, pharmaceutical, and desalination plants, for concentrating or evaporating liquids. Their design can be customized based on the specific process requirements, heat transfer rates, and desired evaporation rates. How Do You Clean a Shell and Tube Evaporator? Cleaning a shell and tube evaporator is essential to maintain its efficiency and longevity. Here are the typical methods used to clean these evaporators: Mechanical Cleaning1. Tube Lancing/Rodding: A rodding machine is used to clean the evaporator tubes by propelling flexible lances or rods at high pressure (up to 10,000 psi) to dislodge fouling and deposits from the inside of the tubes.2. Tube Brushing/Drilling: Mechanical brushes or drilling tools can be inserted into the tubes to scrape off and remove hard deposits. Chemical CleaningA closed-loop chemical cleaning system is used to circulate chemical solutions (acidic or alkaline) through the evaporator to dissolve and remove scales, fouling, oil/grease deposits. The steps typically involve: 1. Preparation: Isolating and preparing the evaporator by removing covers/heads.2. Chemical Circulation: Circulating the heated chemical solution through the tube side and shell side using pumps.3. Solution Monitoring: Monitoring solution strength and replenishing/adjusting as needed.4. Rinsing: Rinsing with clean water to remove chemical residues. Water JettingHigh-pressure water jetting (up to 2500 bar or 36,000 psi) can be used to blast away fouling from the inside of the tubes using flexible lances or rigid lances mounted on tube lancing equipment (TLE). The key steps include: Isolation: Shutting down and isolating the evaporator.Access: Removing heads/covers to access the tube bundle.Jetting: Deploying high-pressure water jetting lances into the tubes.Waste Management: Collecting and treating the wastewater generated.Regular cleaning intervals (e.g., every 3 years for evaporators) are recommended to maintain efficiency and prevent excessive fouling buildup. Proper planning for downtime, safety precautions, and waste handling is crucial for effective evaporator cleaning. ConclusionMaintaining your evaporator in peak condition is essential for ensuring efficient operation, consistent product quality, and cost-effective production. By understanding the signs of clogging, the working principles of shell and tube evaporators, and effective cleaning methods, you can prevent downtime and extend the life of your equipment. Regular monitoring and preventive maintenance are your best allies in keeping your evaporator running smoothly and your production line efficient. Remember, a proactive approach to maintenance can save you from significant headaches and expenses down the line.

Sodium Sulfate MVR Evaporation Crystallization

Recently, Myande signed a contract with Cathay Industrial Biotech, by which Myande will supply Cathay with an MVR evaporation and crystallization facility to process wastewater and extract sodium sulfate as a value-adding by-product from the wastewater. This evaporation & crystallization facility to be supplied by Myande will enable Cathay to utilize wastewater and create economic benefit in an environmentally-friendly manner.   Cathay Industrial Biotech is a world-leading industrial biotechnology company specialized in the production of chemical intermediate long-chain dibasic acid for the synthesis of nylon, polyester, adhesive and bio-solvent. Long chain dibasic acid, a linear aliphatic dibasic acid containing 10 to 15 carbon atoms, is produced by a bio-fermentation method in which a large amount of high-salt wastewater is normally generated. It is difficult to process the wastewater because of the high concentration of pollution and poor biodegradation.   The technical solution to be supplied by Myande including MVR evaporation and concentration, frozen crystallization and fluid bed drying technology will be applied to process wastewater for recycling industrial sodium sulfate.  

The Ultimate Guide to Lithium Extraction Industry

The lithium industry has been experiencing rapid growth over the past decade, driven by the increasing demand for lithium-ion batteries used in electric vehicles, energy storage systems, and other high-tech applications. As of early 2023, the lithium industry is still not recovered from the pandemic, with some supply chain disruptions and production delays still affecting the market. However, overall demand for lithium is expected to continue growing, driven by the ongoing transition to electric vehicles and renewable energy sources. However, do you know where all that lithium comes from and how it’s produced? In this article, we will take a look at some typical lithium production paths and how they compare.   What is lithium extraction? Lithium extraction refers to the process of obtaining lithium from its sources, which can be ores or brines. There are several methods for extracting lithium, depending on the source and the specific minerals present.   What are the paths to lithium extraction? There are several paths to lithium extraction, each with its own advantages and disadvantages. The most common methods of lithium extraction are:   1. Mining: Lithium can be mined from hard rock deposits, known as spodumene, using traditional underground or open-pit mining methods. Lithium extraction from hard rock, such as spodumene, typically involves a combination of crushing, grinding, roasting, leaching, purification, precipitation, drying and packaging. Lithium extraction from hard rock is typically more expensive and energy-intensive than brine extraction, but it can also yield higher-quality lithium. Spodumene is one of the most common sources of hard rock lithium, but other minerals such as petalite and lepidolite can also be used.   2. Brine Extraction: Lithium can also be obtained from brine deposits, which are underground reservoirs of salty water that contain dissolved lithium. Brine is typically pumped to the surface and allowed to evaporate in large ponds, leaving behind lithium salts that can be further processed. Brine extraction is generally less expensive than mining, but it can be slower and yield lower-quality lithium. In some cases, reverse osmosis (RO) is used to concentrate the lithium brine to speed up the evaporation process.   3. Geothermal Brine Extraction: Geothermal brine extraction is a variation of brine extraction that involves using hot water from geothermal wells to dissolve and extract lithium from underground brines. This method can be more sustainable and environmentally friendly than traditional brine extraction, but it is still in the experimental stages and is not yet widely used.   4. Lithium Clay Extraction: Lithium can also be obtained from clay deposits, which are mined using conventional open-pit mining methods. The clay is then leached with sulfuric acid to extract the lithium. This method can be less expensive than traditional mining, but it can also yield lower-quality lithium.   Each method of lithium extraction has its own set of advantages and disadvantages, and the choice of method will depend on factors such as the quality and quantity of the lithium source, environmental regulations, and economic considerations. As the demand for lithium continues to grow, there is ongoing research and development into new and more efficient methods of lithium extraction.   What are the trends in lithium extraction industry? In terms of future trends, several key developments are likely to shape the lithium extraction industry in the coming years:   1. Expansion of Production Capacity: As demand for lithium continues to grow, lithium producers are expanding their production capacity to meet this demand. This has led to the development of new lithium mines and processing facilities, particularly in countries with large lithium reserves such as Australia, Chile, and Argentina.   2. Diversification of supply: As demand for lithium grows, there is likely to be an increased focus on diversifying the sources of lithium production. Currently, the majority of lithium comes from just a few countries, including Australia, Chile, and Argentina. However, new sources of lithium, such as brine deposits in Nevada and clay deposits in Mexico, are being developed.   3. Technological advancements: Advances in battery technology, such as the development of solid-state batteries, could change the demand dynamics for lithium and other materials used in battery production. In addition, improvements in lithium extraction and processing techniques could help to reduce the environmental impact of lithium mining and production. Also the use of new membrane technologies and ion exchange resins will reduce the environmental impact of brine extraction.   4. Policy changes: Government policies, such as subsidies for electric vehicles and incentives for renewable energy development, are likely to continue to drive demand for lithium. However, there could also be regulatory changes aimed at reducing the environmental impact of lithium mining and production, which could increase costs for producers and affect the supply chain.   Overall, the lithium industry is likely to continue to experience strong growth in the coming years, driven by the ongoing transition to electric vehicles and renewable energy sources. However, the industry will need to navigate challenges such as supply chain disruptions, environmental concerns, and changing technology and policy landscapes in order to sustain this growth.   Myande offers a variety of technologies for major upstream and midstream lithium extraction processes, including evaporation concentration, crystallization, purification separation and drying. Myande processes provide its customers with a competitive advantage, achieving higher productivity under tighter specifications while reducing costs and increasing efficiency. And all of plants meet the complex safety requirements of the chemical industry.

Chemical Wastewater Three-Effect Evaporation Project

Recently, Lianyungang Chameleon Technology Co. Ltd. and Myande Group signed a contract by which Myande will supply a complete three-effect evaporation crystallization equipment to treat different types of salt-containing wastewater. The project aims to deal with the wastewater containing ammonium chloride, sodium chloride and sodium sulfate generated from the production process of Chameleon workshop. Three-effect evaporation system can treat three kinds of wastewater separately and save equipment investment for customer effectively. The conclusion of this contract indicates that Myande has taken one further step in the comprehensive treatment of various types of wastewater.

Myande Awards 2022 “Spring Sunshine” Scholarship

In order to motivate employees' children to study hard and to enhance employees’ sense of belonging and happiness, on August 19, Myande held 2022 Myande Spring Sunshine Education Scholarship ceremony. Mr. Wangmu, vice chairman and Mr. Mao Weijiang, director in charge of manufacturing, participated in this ceremony and on behalf of the company presented scholarship stipends to children of Myande employees who are enrolled by four-year universities this year.   In his speech, Mr. Wang highlighted that Spring Sunshine Scholarship is one of several company welfare benefits. It represents the company’s vision of moving forward with its employees and creating a better future together, and it reflects the company's care for the education of its employees' children and its high sense of social responsibility.  


  • What is the process of crystallization in wastewater treatment?

    • Crystallization is a separation process used in wastewater treatment to remove dissolved salts and impurities from water. This method is particularly effective when dealing with wastewater that contains high concentrations of inorganic salts, heavy metals, or other dissolved solids. The basic process of crystallization involves inducing the dissolved substances to form solid crystals, which can then be separated from the water.

      Here's an overview of the typical process of crystallization in wastewater treatment:
      1. Pre-treatment: Before the crystallization process begins, the wastewater often undergoes pre-treatment steps to remove larger particles, organic matter, and other contaminants that could interfere with the crystallization process.

      2. Cooling or Evaporation: Crystallization can be achieved through either cooling or evaporation. In the cooling method, the wastewater is cooled down to reduce its solubility for the dissolved salts. As the temperature drops, the solubility limit is reached, causing the salts to precipitate and form crystals. In the evaporation method, the wastewater is subjected to controlled evaporation, which again leads to the concentration of salts beyond their solubility limits, resulting in crystal formation.

      3. Nucleation: Nucleation is the initial step in crystallization, where tiny crystal particles (nuclei) begin to form in the supersaturated solution. The rate and size of nucleation can significantly influence the efficiency and characteristics of the crystallization process.

      4. Crystal Growth: Once the nuclei form, they serve as sites for further crystal growth. Solids continue to accumulate onto these nuclei, gradually forming larger crystals. The growth process can be influenced by factors such as temperature, concentration, and the presence of impurities.

      5. Separation: As crystals grow, they become denser than the surrounding liquid and eventually settle at the bottom of the crystallization vessel. Depending on the scale of the operation, various separation methods can be employed, including sedimentation, centrifugation, or filtration, to separate the solid crystals from the remaining liquid.

      6. Washing (Optional): After separation, the collected crystals might undergo a washing step to remove any adhering impurities or residual mother liquor (the liquid portion from which crystals precipitate).

      7. Drying: The washed crystals are usually still wet, so they need to be dried to achieve the desired moisture content. Drying can be achieved through various methods such as air drying, vacuum drying, or using specialized drying equipment.

      8. Disposal or Recovery: The recovered crystals can be disposed of in an environmentally responsible manner or potentially recycled or reused, depending on the composition of the crystals and the specific goals of the wastewater treatment process.

      It's worth noting that the effectiveness of the crystallization process depends on various factors including the nature of the dissolved substances, the characteristics of the wastewater, temperature, pressure, and other operational parameters. Additionally, the choice between cooling and evaporation methods will depend on the specific circumstances and objectives of the wastewater treatment facility.

  • What are the advantage and disadvantage of crystallization over evaporation?

    • Crystallization and evaporation are both valuable separation and concentration processes, but they have distinct advantages and disadvantages depending on the specific application and requirements. Here's a comparison of the two processes:

      Advantages of Crystallization:
      1. Purity Enhancement: Crystallization often leads to higher levels of purity compared to evaporation. The selective formation of crystals can effectively separate impurities from the desired product.

      2. Selective Recovery: Crystallization allows for the selective recovery of specific substances from complex mixtures, which might be challenging to achieve with evaporation alone.

      3. Resource Efficiency: Crystallization can be more energy-efficient in cases where the process relies on the heat of crystallization (the heat released or absorbed during crystallization) to drive the separation, reducing the need for external heating or cooling.

      4. Product Quality: Crystallization can produce high-quality, well-defined crystals that meet certain size and shape specifications, which is important in industries like pharmaceuticals and specialty chemicals.

      5. Waste Minimization: Crystallization can be used for efficient removal of dissolved contaminants from wastewater, minimizing the volume of waste generated.

      Disadvantages of Crystallization:
      1. Complexity: Crystallization processes can be complex and sensitive to various factors such as temperature, supersaturation, and impurities, making process control and optimization challenging.

      2. Slow Process: Crystallization processes are often slower compared to evaporation due to the time required for nucleation and crystal growth.

      3. Equipment and Maintenance: Crystallization equipment can be more intricate and require careful maintenance due to the need to control nucleation and crystal growth.

      4. Higher Capital Costs: Crystallization setups can have higher initial capital costs compared to simple evaporation systems.

      Advantages of Evaporation:
      1. Simplicity: Evaporation is a straightforward process that involves heating a solution to remove water and concentrate the solutes.

      2. Faster Process: Evaporation is generally faster than crystallization since it does not require the additional time for crystal formation and growth.

      3. Lower Capital Costs: Evaporation systems can be simpler and more cost-effective to set up compared to complex crystallization systems.

      4. Versatility: Evaporation can handle a wide range of solutions and substances without requiring extensive adjustments.

      Disadvantages of Evaporation:
      1. Purity Limitation: Evaporation may not achieve the same level of purity as crystallization, as it does not offer the same degree of selective separation.

      2. Energy Intensive: Evaporation processes can be energy-intensive, especially when dealing with solutions with high water content.

      3. Impurity Concentration: In some cases, evaporation can lead to the concentration of impurities along with the desired product.

      4. Limited Selectivity: Evaporation may not be as effective for selectively separating different components of a mixture.

      In summary, the choice between crystallization and evaporation depends on the specific objectives of the process, the nature of the substances being processed, the desired level of purity, the efficiency considerations, and the available resources. In many cases, these processes can also be combined in a multi-step approach to achieve the desired results.

  • How is lithium extracted from spodumene ore?

    • Lithium is extracted from spodumene ore using the following steps, including the application of evaporative and crystallization technology:

      1. Crushing: Spodumene ore is crushed into smaller particles to increase its surface area.

      2. Roasting: The crushed ore is roasted to convert spodumene to a more reactive form.

      3. Sulfuric Acid Digestion: Roasted ore is treated with sulfuric acid to form lithium sulfate solution.

      4. Leaching: The lithium sulfate solution is leached to separate it from impurities.

      5. Purification: The solution undergoes purification to remove unwanted elements.

      6. Evaporative Crystallization: The purified solution is concentrated using evaporation, causing lithium to crystallize.

      7. Harvesting Crystals: Crystals of lithium compounds are collected as they form.

      8. Washing and Drying: Collected crystals are washed and dried to remove residual impurities and moisture.

      9. Conversion: Dried crystals are converted into battery-grade lithium compounds like Li2CO3 or lithium hydroxide.

      Evaporative and crystallization enhance the efficiency of lithium extraction by concentrating the solution and facilitating crystal formation, aiding in the separation and recovery of lithium from spodumene ore.

  • What is the process of lithium refinery?

    • The process of lithium refining involves the following steps:

      1. Ore Preparation: Crush and roast lithium-containing minerals, like spodumene, to make them reactive.

      2. Sulfuric Acid Digestion: Treat roasted ore with sulfuric acid to create lithium sulfate solution.

      3. Impurity Removal: Purify the solution to eliminate unwanted elements.

      4. Li2CO3 Precipitation: Precipitate Li2CO3 using soda ash.

      5. Filtration and Drying: Separate and dry the Li2CO3 crystals.

      6. Conversion: Convert Li2CO3 to battery-grade lithium compounds.

      7. Evaporative Crystallization (Optional): Concentrate and crystallize lithium from solution through evaporation.

      8. Washing and Drying (Optional): Wash and dry the crystallized lithium compounds.

      9. Final Product: Obtain high-purity lithium compounds ready for various applications.

      This process yields refined lithium compounds suitable for industries like batteries, electronics, and pharmaceuticals.

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