There are various processes for producing chemical powders, and our company can provide grinding machines for chemical powders that rely on crushing processes. The following articles are all discussing grinding machines related to crushing technology.
The crushing process in chemical powder production is a crucial step, which directly affects key performance indicators such as particle size, particle size distribution, purity, flowability, and reaction activity of the final product. There are many types of chemical powders (such as pigments, catalysts, drugs, ceramic powders, metal powders, additives, etc.), and their physical and chemical properties vary (hardness, brittleness, toughness, heat sensitivity, flammability, explosiveness, toxicity, etc.), so it is necessary to choose suitable crushing equipment and processes.
1) Clarify the purpose and requirements of crushing
- Requirements for reducing particle size: What is the required fineness of the chemical powder after crushing
- Particle size distribution requirements: Obtain the required particle size distribution width, narrow distribution is usually a sign of high-quality products.
- Increase specific surface area: Increase the contact area between particles and the surrounding environment (such as solvents and reactants) to improve dissolution rate or reaction activity.
- Improving liquidity: It is crucial for subsequent mixing, transportation, packaging, or compression molding.
- Ensure purity: Avoid introducing impurities (from equipment wear, environment, etc.) during the crushing process.
- Ensure safety: When handling flammable, explosive, toxic, or corrosive chemicals, the equipment must have corresponding protective measures (explosion-proof design, dust removal system, etc.).
- Maintain material properties: Avoid excessive crushing that may cause changes in crystal structure, agglomeration, thermal degradation, or mechanochemical changes.
2) Selection of Crushing Equipment
Our company can provide hammer/impact crushers and ultrafine crushers for chemical powder production.
A. Hammer/impact crusher
Principle: Use a high-speed rotating hammer or rotor to impact and crush materials. Usually, there is a sieve to control the particle size of the discharged material.
Advantages: Simple structure, large processing capacity, suitable for medium crushing (several hundred microns).
Application: In chemical powder production, it is mainly used for primary crushing of raw materials (such as pre-treatment of large crystals and clumps), rather than fine crushing of final products.
If the budget is limited, you can choose to use this crusher with a screening machine for screening.
B.Ultra fine powder grinder
Principle: The ultra fine powder grinder utilizes the balance of centrifugal force (generated by a rotating impeller) and airflow drag to crush and separate particles of different sizes. In the ultrafine crushing system, the classifier is equally important as the crusher, used for real-time separation of qualified fine powder, avoiding over crushing, improving efficiency, and controlling particle size distribution.
Advantage: the powder size is very fine like 80-300mesh for many chemical products. Also, the powder distribution range is narrow so the powder is very even.
If you need a chemical grinding machine, please let us know your specific requirements. We will match suitable crushers according to the requirements.