Surface modification is an important means to improve the application performance of calcium carbonate, improve applicability, expand the market and dosage, and in the future, functionalization and specialization will become the main trend of calcium carbonate development, and the market demand for various surface modification special calcium carbonate will be increasing.
What are the calcium carbonate modification equipment?
Three-roller modifier
Principle and characteristics: The surface coating of the powder is realized by changing the cyclonic vortex and other effects through the relative motion of the three rotors. No heating device is required, investment is saving, and operating costs are low. An important goal of this process is the homogeneous and complete distribution of the modifier in the calcium carbonate powder during processing. The amount of modifier added (weight ratio) accounts for 04- 1.4%, accounting for 5% of precipitated calcium carbonate modified products. In order for this very small amount of modifier to supply a balanced large amount of calcium carbonate powder, the modifier needs to be dissolved and mixed with calcium carbonate powder. Natural or synthetic waxes (e.g. stearic acid) are mainly used as modifiers.
Cyclone mill modifier
Principle and characteristics: the use of tapered rotor and stator, rotor and stator gap adjustment; The linear speed of the rotor can reach 120 meters per second; The material is subjected to high-speed impact, shear and friction between the rotor and stator to complete the coating process. The continuous powder surface coating modification system is designed and manufactured on the basis of digestion and absorption of German technology, which can be used for the surface modification of a variety of powders, such as calcium carbonate powder (heavy, precipitation), kaolin, talc, mica, graphite, barium sulfate, silica, magnesium hydroxide, zinc oxide, alumina, etc., the system is suitable for a variety of solid and liquid modifiers, such as aluminate coupling agent, titanate coupling agent, silane coupling agent and stearic acid.
Needle disc grinding modifier
Principle and characteristics: the two rotors move relatively, and the linear speed is as high as 200 meters per second. High-velocity impact, shear and friction lead to sufficient dispersion of the material and a sharp rise in temperature to meet the needs of particle coating. The needle disc mill can be configured with many different types of hammers and many types of lined screens, and by adjusting the specifications of the hammers, liners and screens, various types of raw materials can be processed, and the grinding fineness is usually in the range of about 10 m and 1000 m. Thanks to the ventilation of the rotor, the product is cooled during the conveying process, so that the end product is less delicate and has good flowability.
In general, coating modifiers have important applications in many fields such as materials science, chemical engineering, medicine and food, and meet the needs of different fields by changing the properties and functions of substances. Please note, however, that the specific cladding modder model and configuration may vary depending on the application area and specific needs, so when selecting and using a cladding modifier, it is necessary to evaluate and select on a case-by-case basis.