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What is Calcite Grinding Mill?

Calcite is a kind of calcium carbonate mineral the main ingredient is CaCO3, normally colorless or white, sometimes variegated. The theoretical chemical constitution is: CaO:56.03%, CO2: 43.97%, usually contains isomorph like MgO, FeO, MnO, etc. Moh’s hardness 3, density 2.6-2.94, with glassy luster. In China, calcite is found in Guangxi, Jiangxi, Hunan area. Guangxi calcite is famous for high whiteness and low acid non-soluble substance. Calcite is also found in North and North-east China, but usually accompanied with dolomite, the whiteness generally under 94, with high rate of acid non-soluble substance.

Usage of Calcite Grinding Mill

1.Under 200 mesh: used in feed supplement, calcium content more than 55.6%, without harmful component.

2.250-300 mesh: used as the raw material of plastic plant, rubber plant, coating plant, waterproof material plant, and can be also used for wall painting. Whiteness is higher than 85 degree.

3.350-400 mesh: used to produce buckle, pipe, and applied in chemical industry. Whiteness above 93 degree.

4.400-600 mesh: used to produce toothpaste and soap. Whiteness over 94 degree.

5.Over 800 mesh: used to produce rubber, plastic, cable and PVC. Whiteness over 94 degree. 6.Over 1250 mesh: applied in PVC, PE, paint, coating level production, paper making first coat and top coat with whiteness higher than 95 degree. Have the advantages of high purity, high whiteness, non-poisonous, odorless, low thin oiliness, low hardness.

Model selection and technological process in Calcite Grinding Mill powder processing

Calcite material proximate analysis

CaOMgOAl2O3Fe2O3SiO2Firing quantityGrinding work index (kWh/t)
53-55 0.30-0.36 0.16-0.21 0.06-0.07 0.36-0.44 42-43 9.24 (Moh’s:2.9-3.0)


Main mill model selection scheme of calcite powder processing

Product Specification (mesh)80-4006008001250-2500
Model Selection scheme  R Series Grinding Mill HC Series Grinding Mill HCQ Series Grinding Mill HLM Vertical Mill R Series Grinding Mill HC Series Grinding Mill HCQ Series Grinding Mill HLM Vertical Mill HCH Series Ultra-fine Mill HLM Vertical Mill HCH Series Ultra-fine Mill+classifier HLM Vertical Mill (+classifier) HCH Series Ultra-fine Mill


Depending on material feature and production usage, different models have special advantages under different fineness requirement.

Analysis on grinding mill models

1, Raymond Mill, HC series pendulum grinding mill: low investment costs, high capacity, low energy consumption, equipment stability, low noise; is the ideal equipment for wollastonite powder processing. But the degree of large-scale is relatively lower compared to vertical grinding mill.

2, HLM vertical mill: large-scale equipment, high capacity, to meet the large-scale production demand. Product has high degree of spherical, better quality, but the investment cost is higher.

3, HCH ultrafine grinding roller mill:ultrafine grinding roller mill is efficient, energy-saving, economical and practical milling equipment for ultrafine powder over 600 meshes.

4, HLMX ultra-fine vertical mill: especially for large-scale production capacity ultrafine powder over 600 meshes, or customer who has higher requirements on powder particle form, HLMX ultrafine vertical mill is the best choice.

Calcite Grinding Mill powder processing technological process

Phase one: raw material crushing Calcite blocks will be crushed to 15mm-50mm by crusher.

Phase two: grinding Crushed calcite material will be sent to the storage hopper by the elevator, and then the feeder will send the material to the main mill for grinding.

Phase three: classifying Ground material will be classified, coarse powder will fall back to the main mill to be ground again.

Phase four: production collecting Qualified powder will flow with the air and be collected in the dust catcher, and then the finished powder will be transported to the product storage bin through discharge port. Lastly, the powder will be loaded by tank car or packed by packing machine.

We offer full set of calcite powder processing solution to convoy your calcite powder project!

Learn more about powder processing integration service

Application examples of Calcite Grinding Mill powder processing

Material: calcite

Fineness: 325 mesh D97

Capacity: 8-10t/h

Model: 1 set of HC1300 mill

Customer feedback:
Producing powder of the same fineness, HC1300 have 2 tons higher capacity than traditional 5R mill, which lower the energy consumption. The whole system operates under full automatic control, it only need our worker to do some simple operates in the control room, which saves up labor cost. Lower cost of operating will bring more competitiveness to our production. More over, all the designing, installing and testing of the project are all free, we are very satisfied about it.

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