Limestone, also known as chalk, aragonite ,white marble, is mainly composed of CaCO3. Its Moh's hardness is around 3, soft and brittle. Lime can be used widely. Processed directly, it can be building aggregate; Calcined, quicklime; Powdered, the industrial raw material. Now, recycling limestone tailings to produce powder is a way turning waste into treasure.
| Fineness | Applications | Recommended Equipment |
| 40-150meshes | As chemical products, it can be used in construction, wall coating, chemical filler, paper-making material and sealants. | MTM Trapezium Grinder MTW Milling Machine |
| 150-200meshes | It has low Calcium and can be used in asphalt mixing plant on expressway. | |
| 250-325meshes | Desulfurization. Two standards. one is 250meshes D90; the other 325meshes D90. High Calcium content with over 50% CaO and over 90% CaCO3. | LM Vertical Mill |
1.Crushing Stage:Except limestone tailings, big limestone blocks would be crushed into materials within 15mm-50mm--- the feeding size of grinders.
2.Grinding Stage:The small qualified pieces of limestone would be evenly sent, by conveyor and feeder, into the grinding cavity where the materials would be ground into powder.
3.Grading Stage:The ground material with air flow would be graded by powder separator. After that, the unqualified powder would be sent back to the grinding cavity for another grind.
4.Powder Collecting Stage: With air flow, powder meeting the fineness standard enters into the powder collecting system along the pipe. The finished powder products are sent to finished product warehouse by conveyor and packed by powder filling tanker and automatic pack machine.
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