Limestone, also known as chalk, aragonite ,white marble, is mainly composed of CaCO3. Its Moh’s hardness is around 3, soft and brittle.
Limestone Mining Process
Feeding System
The limestone in the receiving hopper enters the bucket elevator through the belt conveyor (plus iron remover), the elevator sends the material to the raw material warehouse for grinding, and the belt feeder is installed at the lower part of the raw material warehouse to evenly send the materials to the mill for grinding;
Grinding System
The material is sent to the European mill for grinding, and the finished product after grinding is collected by the powder separator, into the cyclone powder collector and pulse dust collector, and is sent to the screw conveyor from the lower discharge port;
Finished Product Conveying System
The discharge port of the screw conveyor is equipped with a pneumatic conveying system to transport the finished product to the finished product warehouse, and the excess gas is filtered by the dust collector on the top of the warehouse;
Dust Removal System
The whole system is equipped with three pulse dust collectors, and air exhausts are installed at all dust-raising points to ensure that the whole system has no dust leakage and realize dust-free operation on site.
Control System
The system is equipped with an intelligent PLC control cabinet and upper computer to realize the start-stop, monitoring, and interlocking linkage functions of all equipment of the whole system, and reserve DNS interface, which can realize remote control.
Limestone Grinding Mill
Limestone Fineness And Recommended Equipment
Limestone can be divided into four different specifications according to the different grinding fineness:
- Approximately 95% through 200 mesh: is the raw material for producing anhydrous calcium chloride, sodium dichromate, glass and cement. It is also used for building materials and poultry feed, etc.
- Approximately 99% through 325 mesh: is the raw material for the production of anhydrous calcium chloride and glass, the white filler for rubber and paint, and is also a building material.
- Approximately 99.9% through 325 mesh: is used as a filler for plastics, paint putty, plywood and paint
- Approximately 99.95% through 400 mesh: is used as a filler for wire insulation, rubber molded products and asphalt felt.
| Fineness | Applications | Recommended Equipment |
| 40-150 meshes | As chemical products, it can be used in construction, wall coating, chemical filler, paper-making material and sealants. | MTM Trapezium Mill MTW Trapezium Mill |
| 150-200 meshes | It has low Calcium and can be used in asphalt mixing plant on expressway. | |
| 250-325 meshes | Desulfurization.
one is 250meshes D90; the other 325meshes D90. |
LM Vertical Mill |
