How To Make Calcite Powder？

What is calcite?

Calcite is a calcium carbonate mineral rock.


Calcite is a widely distributed mineral. Calcite has a variety of crystal shapes, and their aggregates can be clusters of crystals, or they can be granular, massive, fibrous, stalactite-like, earthy, and so on.
The chemical composition of calcite is 56.03% CaO, 43.97% CO2, often containing Mn and Fe, and sometimes Sr.

Calcite powder is the powder obtained after calcite grinding, generally refers to ground calcium carbonate/ heavy calcium carbonate.



Calcite powder has a wide range of uses, usually used as a filler, widely used in artificial floor tiles, natural rubber, synthetic rubber, coatings, plastics, composite new calcium plastics, cables, papermaking, toothpaste, cosmetics, glass, medicine, etc.
 

How to make calcite powder?

Calcite powder is generally divided into 4 types: calcite coarse powder processing (0-3MM), fine powder processing (20 mesh-400 mesh), calcite ultra-fine powder deep processing (400 mesh-1250 mesh) and micro powder processing (1250 mesh-3250 mesh ). Calcite powder processing technology is as follows.
 

Stage One: Calcite Stone Crushing

The calcite bulk material is crushed by the crusher to the feed fineness (15mm-50mm) that can enter the mill.

The specific process is as follows:

Large pieces of calcite are evenly sent to the primary crusher (jaw crusher) by the vibrating feeder through the silo for coarse crushing, and the coarsely crushed calcite is sent to the secondary crusher (impact crusher or cone crusher) by the belt conveyor for further crushing;

The finely crushed calcite is sent to the vibrating screen by the belt conveyor for screening, and several calcites of different sizes and specifications are screened out, and the calcite that meets the particle size requirements is sent to the finished product stockpile by the finished product belt conveyor ;

Calcite that does not meet the particle size requirements is returned by the belt conveyor to the impact crusher or cone crusher for re-crushing, forming a closed circuit for multiple cycles. The particle size of the finished product can be combined and classified according to the needs of users.

In order to protect the environment, it can be equipped with auxiliary calcite processing and dust removal equipment.
 

Stage Two: Calcite Powder Grinding

The crushed calcite small pieces are sent to the silo by the elevator, and then evenly and quantitatively sent to the grinding chamber of the mill by the vibrating feeder for grinding.

Raymond mill, high pressure mill and enhanced roller mill are generally used for fine powder processing;

Ultra-fine powder processing generally uses CLUM ultra-fine vertical mill and HGM medium-speed micro-powder mill.
 

Stage Three: Calcite Powder Grading

The ground materials are classified by the powder classifier, and the unqualified powder is classified by the classifier and returned to the main machine for re-grinding.
 

Stage Four: Collecting Calcite Powder

The fineness powder enters the dust collector with the airflow through the pipeline for separation and collection, and the collected finished powder is sent to the finished product silo by the conveying device through the discharge port, and then uniformly packed by a powder tanker or an automatic baler.
 

Calcite powder processing equipment

The two most important pieces of equipment in calcite powder processing are crushers and grinding mills.

Calcite Crushers

There are many kinds of calcite crushers, mainly the following three types: jaw crusher, impact crusher and cone crusher.
 

1. Jaw Crusher

Jaw crusher is mainly suitable for the head crushing treatment of all kinds of sand and gravel materials, known as the "Tiger's Mouth". are used.
   

2. Impact crusher

Impact crusher adopts relatively refined rotor and cavity type, and has a large crushing ratio, which is suitable for medium and fine crushing of low-hardness and brittle materials; its crushing effect is good, and the crushed materials meet the market demand.
   

3. Cone Crusher

Cone crusher is often used for medium and fine crushing of materials with high hardness, and its hourly output is also large, up to 2130 tons; the structure is simple, the reliability is strong, easy to maintain and operate, and the use cost is low; it adopts a variety of cavities Type design, can also crush materials to different degrees.
   

Calcite Grinding Mills

According to the different output fineness, we mainly introduce the following calcite grinding mills: coarse powder mill, Raymond mill, ultrafine mill, ultrafine vertical mill and ball mill.

1. Coarse Powder Mill

Capacity: 10-100t/h
Max feeding size: 80mm
Processing ability: 10-100t/h
Range of application: Barite, quartz, feldspar, mica, calcite, talc, apatite, gypsum, fluorite, limestone, dolomite, diatomite, ceramic soil, clay, marble, granite, fly ash, kaolin, calcium carbonate, slag, bauxite, glass, etc.

2. Raymond Mill

CLIRIK YGM series Raymond mill: The fineness of the product is generally between 325-600 mesh. If finer powder is produced, neither the equipment's bearing capacity nor the economy is allowed.  

3. HGM Ultrafine Mill

Ultrafine grinding mill is also named HGM ultrafine grinding mill. It can be used for pumice, activated carbon, limestone, calcite, marble, talc, barite, gypsum, dolomite, bentonite, mica, pyrophyllite, sepiolite, diatomite, graphite, alumite, fluorite, potassium feldspar , Phosphate rock, pigment and other more than 100 kinds of non-flammable and explosive materials with humidity less than 6% and Mohs hardness not greater than 6 are processed into ultra-fine powder. The particle size of the finished product is 325-2500 mesh (0.044-0.005mm).
Feed fineness: less than 20 mm
Discharge fineness: 325-2500 mesh (0.044-0.005mm)
Capacity: 0.5-45 t/h
Applicable materials: Pumice, activated carbon, limestone, calcite, marble, talc, barite, gypsum, dolomite, bentonite, mica, pyrophyllite, sepiolite, diatomite, graphite, alumite, fluorite, potassium feldspar , Phosphate rock, etc.
Applicable material hardness: Mohs hardness is less than 6.
Applicable to material humidity: less than 6%
Performance characteristics: 

• 1. HGM Ultrafine Grinding Mill has successfully replaced the jet mill, ball mill etc, simplifty the flow, reduce the production cost and increase the final powder fineness.
• 2. Wearing parts are made of wear-resistant materials. High utilization rate of Wear material: 2-5years.
• 3. Integrated design of powder milling and powder selection, with a smaller footprint.
• 4. Multi-layer grinding ring design for higher grinding efficiency
• 5. Wide grinding range. Adjustable particle size: 200-3000 mesh.
• 6. The structure is firm and reliable. The design of the mill is rigorous, so no screw loosening to damage the machine.
• 7. The operation of intelligent control system is more convenient.
• 8. Grinding cavity fully enclosed design and sound insulation room design.  It is the green and ideal equipment for environment protection.

 

Parameters of ultrafine grinding mill

Model	HGM80	HGM80A	HGM90L	HGM100L-Ⅱ	HGM100P	HGM125L	HGM1680L
Ring Diameter(mm)	800	800	900	1000	1000	1250	1680
Ring Number (PCS)	3	3	4	4	4	4	4
Input Size (mm)	≤10	≤10	≤10	≤15	≤15	≤20	≤20
Output Size (mesh)	150-3000	150-3000	150-3000	150-3000	150-3000	150-3000	150-3000
Capacity (t/h)	0.5-5.5	0.5-5.5	0.8-6.5	1.2-10	1.2-11	2.5-20	5-45
Outlet Size L*W*H (mm)	8605*4139*6050	10454*3393*6626	11735*3952*7525	14507*3633*7562	14362*4200*7562	19261*4406*8591	25067*5414*9007
Main motor power (kw)	75	75	55*2	132/75*2	132/75*2	185	315

 

4. CLUM Ultrafine Vertical Roller Grinding Mill

The CLIRIK CLUM series vertical mill adopts the principle of rolling and shearing. The powder particles that meet the required particle size can be taken away with the air flow in time, thereby avoiding over-grinding and achieving the purpose of energy saving. Secondly, the vertical mill integrates fine crushing, grinding, drying (with moisture below 5%), grading, and conveying functions in one, with high work efficiency and significant energy-saving effects.

According to the pulverization principle of the vertical mill, it can meet the production of products with small destructive microstructure morphology (that is, maintaining the original morphology of the raw material particles) and low pollution (small wear).

Vertical mill and its technical characteristics:
①Low power consumption per ton of product;
②Meet industrial-scale production;
③Meet the requirements of refined and deep processing of products.

Large-scale vertical mill produces special powder for artificial granite and modified powder for plastics.

5. Ball Mill

CLIRIK ball mill and classifier production line (mainly used to produce d97=5-43mm heavy calcium carbonate fine powder and superfine powder)
The ball mill + classifier process is conducive to the refined production of 800-2000 mesh products, and the products are especially suitable for middle and high-end industries such as coatings and plastic master batches. The process meets the requirements of large-scale and refined development of heavy calcium ultrafine powder processing. The added value of the product is relatively high, but the energy consumption is relatively high. For 1250 mesh, the power consumption per ton is about 160 degrees, which limits the ball mill + Promotion of classifier technology.

Other calcite powder processing machinery

 

1. Belt conveyor

The calcite powder production process adopts belt conveyor and gravity conveying. Although this part of the process is not part of the process, it can ensure that the crushing work of the calcite processing equipment plant is reliable.

In some cases, the delivery is done by the miner. The main requirements for calcite ore transportation are: reliable operation, especially when there is no ore tank in front of the next unit, feeding from one unit to another unit should be uniform.

The calcite pulverizer crushing plant mainly uses belt conveyors for transportation. Because the application of belt conveyor transportation is limited by the maximum inclination angle of the conveyor belt (up to 20 degrees), belt conveyor transportation not only determines the size of the crushing plant, but also determines the structure layout and building area of the entire enterprise.

2. Screening equipment

In the calcite crushing process, screening is the second most important process operation, and it affects the production process index of the calcite mill in a unique form, because the presence of fine particles in the ore feed has a negative impact on the production capacity of the crusher. Adverse effects, thereby reducing the crushing efficiency. In this sense, screening is the main task to improve the production efficiency of the crusher.

The second role of calcite mill screening is to control qualified products, because the products that are screened are qualified products in most processes.

Sieving is of particular importance in closed-circuit processes. In this case, the role of sieving can be compared with crushing, and sometimes it is even of primary importance. The ore tank storage (stacking) and batching that are part of the crushing process are designed to make the main process work stably.