The products of Shanghai micro powder technology are widely used in various industries of modern industry, such as metallurgy, building materials, chemical industry, mining, papermaking, ceramics, plastics, composite materials, rubber and coatings.
Calcite is the most common natural calcium carbonate mineral. Calcite is widely distributed. Calcite is the main mineral of limestone and marble, and has many uses in production and life. The chemical composition of calcite is CaO accounting for 56.03%, CO2 accounting for 43.97%, often containing Mn and Fe, and sometimes containing Sr.
Calcite
What is the purpose of calcite?
1. Because of its birefringence, icelandite (a kind of calcite) is often used in polarizing prisms. If it is cut into columns in a certain way, it can be used as the prism of a microscope to detect the optical properties of minerals. 2. Generally, calcite is used as industrial raw material such as chemical industry and cement. 3. Calcite is used as a solvent in the metallurgical industry, 4. Calcite is used in the construction industry to produce cement and lime. 5. Calcite is used as a filling additive in plastics, papermaking, toothpaste, and food. 6. When calcite is added in the glass production, the resulting glass will become translucent, which is especially useful for making glass lampshades.
Icelandite
Calcite powder
The important component of calcite powder is CaCO3, and its theoretical chemical composition is: CaO: 56.03%, CO2: 43.97%, often replaced by MgO, FeO, MnO and other similar substances. Calcite powder is generally white, milky white or colorless, density 2.6-2.94, hardness 3, glassy luster, differentiation temperature 898.6℃, compact structure, insoluble in water, soluble in acid, few impurities, average particle size, good processing technology , DOP low oil absorption value and other advantages. At the same time, calcite powder can also be used as a raw material for the silicate industry.
Uses of calcite powder
Calcite powder is GCC, which is the abbreviation of "ground calcium carbonate". It also named heavy calcium carbonate.
Calcite powder is used in artificial stone, artificial floor tiles, natural rubber, synthetic rubber, coatings, plastics, composite new calcium plastics, cables, papermaking, toothpaste, cosmetics, glass, medicine, paint, ink, cables, electrical insulation, food, textiles, Used as fillers in feed, adhesives, sealants, asphalt, building materials, linoleum construction supplies, fireproof ceilings and daily chemical products.
Calcite powder processing process
1. The pre-preparation stage before milling
Before calcite is milled, the raw ore is generally processed because it is large, and clean raw calcite ore is also required. Therefore, the pre-preparation stage before calcite milling generally includes two steps.
The first is the raw material The preparation of calcite first needs to be washed with water to remove impurities, dried and sent to the raw material warehouse;
the second is its pre-crushing stage.
According to the needs of users and subsequent processes, it is generally divided into one stage and two stages, and the two stages are being crushed.
First use a jaw crusherfor rough crushing, and then if the particle size is too large to meet the maximum feed size of the subsequent grinding equipment, a secondary crushing is required.
In the secondary crushing, a cone crusher or a impact crusher is generally used.
The crusher performs fine crushing of calcite, so that the crushed material is sent to the raw material storage by the bucket elevator for standby.
2. Grinding and screening in the grinding stage
After this fashion procedure is completed, it is the key grinding process.
Generally, fine materials are quantitatively fed into the calcite mill by belt conveyor and vibrating feeder for grinding.
According to the different requirements of the user's finished product particle size, the calcite is selected. The milling equipment is also different.
Here, taking the HGM series of ultrafine powder grinding mills as an example, the materials are scattered to the periphery of the circle under centrifugal force, and fall into the raceway of the grinding ring to be crushed by the ring rollers being punched, crushed, and ground.
After the first layer is crushed, the material enters the second and third layers, and the coarse powder after the third layer is crushed is carried into the powder concentrator.
At this time, the classifier performs classification, and the rotating turbine in the classifier makes the coarse-grained materials fall back and regrind, thus completing a production cycle.
Then it goes round and round for production. Calcite powder is prepared in this way.
When working, the main motor drives the main shaft and the turntable to rotate through the reducer, and the roller pins on the edge of the turntable drive dozens of grinding rollers to roll in the grinding ring raceway.
The large pieces of material are crushed into small particles by the hammer crusher, and then sent to the storage bin by the elevator, and then sent to the bulk tray on the upper part of the turntable evenly through the vibrating feeder and the inclined feeding pipe.
The material is scattered to the periphery of the circle under the action of centrifugal force, and falls into the raceway of the grinding ring to be impacted, rolled, and ground by the ring roller. After the three-layer/four-layer loop is processed into powder, the high-pressure fan sucks the outside air into the machine through suction, and brings the crushed material into the powder concentrator.
The rotating impeller in the powder concentrator makes the coarse materials fall back and regrind. The fine powder that meets the requirements enters the cyclone powder collector with the airflow and is discharged by the discharge valve at the lower part of the cyclone as the finished product. The airflow with a small amount of fine dust passes through After the pulse dust collector is purified, it is discharged through a fan and a muffler.
Advantages of HGM series calcite mill
1. High efficiency and energy saving
In the case of the same fineness of the finished product and the same motor power, the output is more than double that of jet mill, stirring mill, and ball mill.
2. Long service life of wearing parts
The grinding roller and grinding ring are forged with special materials, which greatly improves the utilization. In the case of the same fineness of materials and finished products, the service life is 2-5 times longer than the wear parts of impact crushers and turbo crushers, generally up to more than one year. When processing calcium carbonate and calcite, the service life can be up to 2 -5 years.
3. High safety and reliability
Because there is no rolling bearing and no screws in the grinding cavity, there is no problem that the bearings and their seals are easily damaged, and there is no problem that the screws are easy to loosen and damage the machine.
4. High product fineness
The fineness of the product can reach D97≤5μm at one time.
5. Environmental protection and clean
The pulse dust collector is used to capture dust, and the muffler is used to reduce noise, which is environmentally friendly and clean.
Other Ultrafine calcite mills
In addition to the HGM series of ultra-fine mills, CLUM ultra-fine vertical mills can also be used to process ultra-fine calcite. CLUM ultra-fine vertical mills are mainly aimed at high-end calcium carbonate market needs: high whiteness requirements (the same fineness of powder is 3 degrees higher than HGM series mills); high sphericity requirements; and ultra-fine powders (D97＜3000mesh, 2μm＜65%) High requirements; less power consumption and more efficient.
