Reliable Grinding Technology

For the processing of various stones, SBM has developed all kinds of coarse, fine and ultrafine grinding mills to meet customers' demand for powder production from coarse powder(0-3mm),fine powder(0-425meshes) to super fine powder(425-2500meshes).

Marble

Marble is recrystallized limestone. It mainly consists of CaCO3. Under high temperature and high pressure, limestone turns to be soft and its minerals take changes to be recrystallized to form marble. It is colorful and has obvious texture and many mineral particles. The Moh's hardness is 2.5-5. Marble is mainly composed of calcite, limestone, serpentine and dolomite. Calcium carbonate occupies around 50% of the main components. So, the marble leftovers has an important reutilization value which can be processed to be used in chemical field.

Fineness	Applications	Recommended Equipment
80-200meshes	Marble powder, a kind of heavy calcium powder (dolomite powder) with high Ca content. The whiteness is 85,90,93 or higher. Used as materials in construction, wall coating, chemical filler, weighting agent, papermaking and sealants as well as feed additive fields.	MTM,MTW,LM
250-300meshes	Raw materials of plastic, rubber, coating and water-proof products.	MTM,MTW,LM
350-400meshes	Used to produce pinch plates, building and chemical materials.	SCM & LUM
400-600meshes	Used to produce cream paste and soap.	SCM & LUM
Above800meshes	Used in the production of rubber, plastic, cable and PVC filler.	SCM & LUM
Above1250meshes	Used as the raw materials of PVC, PE, paint, coating, bottom & surface coating of papermaking and ink.	SCM & LUM

Processing Technology

1.Crushing Stage:Big blocks would be crushed into materials within 15mm-50mm--- the feeding size of grinders. If the marble leftovers meet the demand of feeding size, the crush is not required.

2.Grinding Stage:The small qualified pieces 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.