Limestone

What is limestone

The main component of limestone is calcium carbonate (CaCO3). Lime and limestone are widely used as building materials and industrial raw materials. Limestone is directly processed into stone and fired into quicklime. Quicklime absorbs moisture or adds water to become hydrated lime. The main component is Ca (OH) 2. Hydrated lime is prepared into lime slurry, lime paste and so on, which is used as coating material and tile adhesive. Calcium carbonate is the main component of limestone, and limestone is the main raw material for glass production. Calcium carbonate can be directly processed into stone and fired into quicklime. Lime includes quicklime and hydrated lime. The main component of quicklime is Cao, which is generally massive, pure white, and light gray or light yellow when it contains impurities. Quicklime is called hydrated lime by absorbing moisture or adding water. Its main component is Ca (OH) 2. Hydrated lime is prepared into lime slurry, lime paste, lime mortar, etc. it is used as coating material and tile adhesive. Cement is made by mixing limestone and clay and calcining at high temperature.

Use of limestone

Limestone is grinded by limestone mill to prepare limestone powder. Limestone powder is widely used according to different specifications

1 It is used for the production of anhydrous calcium chloride, which is the auxiliary raw material for the production of sodium dichromate. Main raw materials for glass and cement production. In addition, it is also used for building materials and poultry feed.

2 It is the raw material of anhydrous calcium chloride and glass, white filler of rubber and paint, and building materials.

3 It is used as filler for plastics, paint putty, paint, plywood and paint.

4 Used as filler for wire insulation, rubber molded products and asphalt felt filler

5. Power plant desulfurization:

It can be used as absorbent of flue gas desulfurization in power plant.

Limestone milling process

The first stage: crushing of raw materials

Large pieces of limestone are crushed by the crusher to the feed fineness (15mm-50mm) that can enter the pulverizer.

The second stage: grinding

After crushing, small pieces of limestone are sent to the storage hopper by the elevator, and then evenly and quantitatively sent to the grinding chamber of the mill by the feeder for grinding.

Stage three: grading

The milled materials are graded by the grading system, and the unqualified powders are returned to the host machine for regrinding after being graded by the classifier.

Stage four: collection of finished products

The powder meeting the fineness will flow through the pipeline into the dust collector for separation and collection. The collected finished powder will be sent to the finished product bin by the conveying device through the discharge port, and then packaged by powder loading tanker or automatic packer.