Calcium carbonate, calcite powder, is short for heavy calcium carbonate, is made of natural carbonate minerals 

such as calcite, marble, limestone ground. It is a commonly used powder inorganic filler, with high chemical pu

-rity, inertia, not easy chemical reaction, good thermal stability, will not decompose below 400℃, high whiten

-ess, low oil absorption rate, low refractive rate, soft, dry, does not contain crystal water, low hardness, sm

-all wear value, non-toxic, tasteless, odorless, good dispersion and other advantages. According to the needs of 

different particle size requirements of ordinary heavy calcium powder, ultrafine heavy calcium carbonate, wet gri

-nding ultrafine calcium carbonate, ultrafine surface modification of heavy calcium carbonate.

There are two production processes for heavy calcium carbonate:

Dry production process: first hand-selected from the quarry to remove the gangue, calcite, limestone, chalk, shell, 

etc.; Then the limestone is coarse crushed by crusher, and then the fine powder is crushed by the ball mill and other 

mechanical equipment. Finally, the powder produced by the ball mill is graded by the classifier. The powder that meets 

the particle size requirements is packaged into the storage as the product, and the unqualified coarse powder is return

-ed to the mill for grinding again.

Wet production process: The suspension made of dry fine powder is placed in the mill for further grinding, and the ultraf

-ine heavy calcium carbonate is prepared after dehydration and drying (the cost of this method is high).

Application: Widely used in paper industry, plastic industry composite materials, all kinds of plastic pipes, profiles, 

plastic products, degradable plastics and wire, cable materials; Rubber industry in the tire, rubber products, sealing 

products; In the coating industry, oil base coating, high-end car surface coating, powder coating, water based coating 

products such as filling materials.

Paper industry: increase the surface gloss, improve whiteness, improve paper smoothness and so on.

Plastic composite industry: can obviously improve the bonding strength and mechanical properties of plastic composite 

interface; In plastic all kinds of plastic pipes, profiles, plastic products, degradable plastics

And wire, cable materials used to toughen, strengthen, improve luster, improve quality and so on.

Rubber industry: can improve the product tensile, tensile, heat resistance, aging resistance, tear resistance and other 

properties.

◆ Coating industry: it can increase the thickness of the coating, improve the wear resistance and weather resistance of 

the coating, and improve the powder coating rate and spraying area. In addition, it does not contain heavy metals.

It is the preferred filler for heavy metal-free powder coatings.

The ultrafine processing technology of heavy calcium is ball mill + ultrafine classifier, and its main equipment features 

are as follows:

Ball mill: The length-diameter ratio of ball mill is designed and optimized according to the mineral processing requirements 

of ultra-fine packing grade. The grate plate grinding tail discharge is smooth, without swelling, and the cylinder does not 

need cooling.

Liner plate and grinding medium are made of high wear-resistant material to ensure the purity of the product. The grinding 

medium is reasonable proportioned according to the product requirements, with high filling rate and high efficiency to opti

-mize the drive and grinding energy consumption

With, save energy consumption and classifier form closed system, negative pressure conveying, no dust.

Classifier: Vertical single rotor classifier or horizontal multi-rotor ultrafine classifier is selected. The precise flow 

field control ensures the accuracy of vertex cutting, and can adjust the flushing air flow to improve the classification 

efficiency

Rate, the material directly into the classification area will not be graded coarse powder mixed dyeing, optimize the rotor 

design to achieve low energy consumption, can be adjusted by different arrangement of the classifier particle size distrib

-ution, meet the requirements

Technical requirements for the same product.

Quantitative system: The feeding system of the ball mill adopts precise quantitative system, which can stabilize the feeding 

even if the density of the material changes. The feeding system of the classifier adopts precise quantitative system.

And with the ball mill discharge interlock, to ensure the stability of system operation and product particle size, air flow 

control valve with air flow measurement system, can accurately control the flow and velocity of the classification of air flow

Environmental protection and noise control: The use of membrane filter bag treatment, exhaust gas dust emission is less than 30 

mg/m³ application of muffler device, exhaust gas noise < 80 dB(A) all weight

The moving parts of the model have shock absorbers, no waste water discharge, only the cooling water of the ball mill bearing, 

which can be recycled.