Calcium carbonate has a wide range of applications and comes in many varieties. From a mineral composition standpoint, calcium carbonate is known by names such as calcite, large calcite, small calcite, coarse crystal, Iceland spar, marble, limestone, Hanbaiyu (a type of white marble), limestone, lime rock, gray rock, stalactite, stalagmite, stone pillar, stone curtain, travertine, chalk, aragonite, and others; from the perspective of sedimentation volume, there are heavy calcium carbonate (heavy calcium), light calcium carbonate (light calcium), and precipitated calcium carbonate; and from whether or not it has been modified, there is ordinary calcium carbonate and active calcium carbonate.

Calcium carbonate has a wide range of applications and many varieties. From a mineral composition standpoint, calcium carbonate is known by names such as calcite, large calcite, small calcite, coarse crystal, Iceland spar, marble, limestone, Hanbaiyu (a type of white marble), limestone, lime rock, gray rock, stalactite, stalagmite, stone pillar, stone curtain, travertine, chalk, Aragonite, etc.; from the perspective of sedimentation volume, there are heavy calcium carbonate (heavy calcium), light calcium carbonate (light calcium), and precipitated calcium carbonate; from whether or not it has been modified, there are ordinary calcium carbonate and active, activated, or modified calcium carbonate; in terms of fineness, there are usually several mesh to 100 or so mesh white sand or snowflake white sand, 150 mesh, 200 mesh, 325 mesh, 400 mesh, 600 mesh, 800 mesh, 1000 mesh, 1250 mesh, 1500 mesh, 2000 mesh, 3000 mesh, 5000 mesh, etc., calcium carbonate powder, there are ultrafine, superfine, nano calcium carbonate, etc., and market common names include single-fly powder, double-fly powder, triple-fly powder, four-fly powder, etc…

 

 

　Currently, the widely used and commonly agreed-upon categories are mainly heavy calcium carbonate, light calcium carbonate, nano calcium carbonate, and active calcium carbonate.

　Heavy calcium carbonate: This is a powder product obtained by mechanically grinding natural ore, with a bulk density of generally 0.8-1.3g/cm3 and a whiteness of 89%-93%. According to the average particle size, it can be divided into:

　Coarsely ground calcium carbonate >3μm Finely ground calcium carbonate 1-3μm Ultrafine calcium carbonate 0.5-1μm

　Light calcium carbonate: This is a precipitated calcium carbonate powder product obtained by chemical reaction, with a bulk density of generally 0.5-0.7g/cm3 and a whiteness of 92%-95%, and can be divided into the following according to average particle size:

　Micron calcium carbonate >5μm Fine calcium carbonate 1-5μm Microfine calcium carbonate 0.1-1μm Ultrafine calcium carbonate 20-100nm Superfine calcium carbonate <20nm

　Nano calcium carbonate: Ultrafine light calcium carbonate and superfine light calcium carbonate are collectively referred to as nano calcium carbonate (1-100nm).

　Active calcium carbonate: Active calcium carbonate is obtained by surface modification of calcium carbonate, and the most significant difference from non-active calcium is its hydrophobicity.

　Calcium carbonate is an important industrial raw material, widely used in plastics, papermaking, rubber, construction, food, medicine and other fields. So, what types of calcium carbonate are needed in different industries?

　1. PVC wallpaper: 1250 mesh active heavy calcium

　2. Silicone sealant: Ultrafine heavy calcium (around 2800 mesh)

　3. Steelmaking: Very coarse stones (5-10mm)

　4. ABS material: Filler masterbatch (600 mesh or more, 400 mesh for lower-end applications, depending on whether the raw material is waste material or other), light calcium, heavy calcium, and nano calcium can also be added

　5. PP: Filler masterbatch

　6. Cast film: (powder) 2500 mesh heavy calcium/1250 mesh light calcium, coarser 325-800 mesh (granules) 400-800 mesh filler masterbatch used on production lines

　7. PVC edging: 1250 mesh heavy calcium

　8. PVC leather: Heavy calcium

　9. PU leather: Light calcium

　10. Plastic barrels: PE filler masterbatch

　11. Putty powder: 325 mesh light calcium (the lowest grade)/800 mesh heavy calcium

　12. Laundry detergent: 1250 mesh light calcium

　13. Carpets: Active light calcium + active heavy calcium (800 mesh or 1250 mesh)

　14. Rubber wastewater treatment: Quicklime

　15. Stationery industry: 1500 mesh light calcium/2500 mesh heavy calcium

　16. Surgical gloves: 2500 mesh light calcium

　17. Coated paper: 1500 mesh light calcium

　18. Toothpaste grade: 325-600 mesh heavy calcium

　19. Electric cables: 2500 mesh heavy calcium/nano calcium

　20. Tires: Light calcium (surface treatment required), talc (1000-1250 mesh), white carbon black (main raw material)

　21. Artificial marble: 80-90 mesh

　22. Coatings, white paint: 1000 mesh or more light calcium/heavy calcium, 2500 mesh or more light calcium has better water absorption and faster drying, nano calcium for coatings

　23. Compound fertilizer: Light calcium/heavy calcium (can be added together)

　24. Soil pH adjustment: Calcium carbonate (increases alkalinity), quicklime (increases acidity)

　25. Resin: 2500 mesh light calcium, 1250 mesh active light calcium, nano calcium for adhesives

　26. PVC pipes: 1250 mesh light calcium/heavy calcium

　27. PVC boards: 1250 mesh active light calcium, better 2200 mesh, activation degree around 80 28. Encapsulating glue: 1500 mesh/2500 mesh heavy calcium

　29. Rubber footwear materials, EVA shoes: 800/1250/2500 mesh heavy calcium

　30. Epoxy resin: 600-1250 mesh heavy calcium (low requirements), 1250 mesh active light calcium

　31. Papermaking: 400-1500 mesh light calcium/heavy calcium

　32. Glass, photovoltaic glass: 200 mesh heavy calcium

　33. Latex paint: Heavy calcium/light calcium, few people use nano calcium, but some use 6602 wet-processed nano calcium

　34. PVC granules: 1250/2500 mesh heavy calcium, or 6603 nano calcium

　35. Modified plastics (PP/PS): 1250/2500 mesh heavy calcium

　36. Ultrafine fiber leather (synthetic leather): 1800 mesh light calcium, 2500 mesh heavy calcium

　37. Building materials: 400 mesh/1500 mesh heavy calcium (low whiteness)

　38. For power plant desulfurization: Calcium hydroxide

　39. Marble glue: Active heavy calcium

　40. Film coating: Water-ground calcium carbonate

　41. Rubber powder: Pure light calcium

　42. Spray coating (powder coating): 800 mesh light calcium

　43. Water-based coatings: 1500 mesh/2500 mesh heavy calcium, active heavy calcium, water-based nano calcium

　44. Pigments: 800 mesh heavy calcium

　45. Producing alkaline water (filter element): 20/30 mesh

　46. Chalk: 325 mesh light calcium, talc

　47. Insulation materials (building): 40-60 mesh white crystal sand, heavy calcium (high temperature resistant)

　48. Foaming: Nano calcium

　49. Automotive chassis coatings: 6601 coating nano calcium, 6607 glass glue nano calcium

　50. Lubricant (keeps non-sticky): 325, 400, 600 mesh heavy calcium

　51. Cleaning machine: 400 mesh heavy calcium

　52. Color film: Water-ground calcium (dispersibility)

　53. Silicone: Nano calcium, light calcium, white carbon black

　54. Oxford bottom shoes: White carbon black

　55. Car film: Active calcium carbonate, nano calcium