Stone processing used abrasives

With economic development, more and more extensive use of stone, particularly in public places, the stone with its elegant posture, loved by the people, and its use, with changing time, there will be aging and contamination and other issues, this can be a way of cleaning initial solution, but sometimes must be achieved by grinding the way the renovation, the following is by abrasives, grinding tools introduced, so that we have a preliminary understanding on this.
First, the abrasive material classification:
It is used for grinding abrasive material, and now the general classification is ordinary abrasive, superabrasive categories;
1, ordinary abrasive
Common abrasives include (1) corundum class (corundum, corundum, etc.), its main chemical composition of Al2O3 (aluminum oxide), (2) type silicon carbide (black silicon carbide, green silicon carbide), its main chemical component of SiC (silicon carbide). Their hardness are corundum, the hardness 2000-2200 kgf / mm 2; corundum microhardness 2200-2300 kgf / mm 2; black silicon carbide, the hardness 3100-3300 kgf / mm 2 ; green silicon carbide, the hardness 3200-3400 kgf / mm 2; size from 4 # - Powder W0.5 (even small), the hardness of the order we can sort out the processing of granite is green silicon carbide, black carbonized silicon and processing marble is white corundum (soft), black, green silicon carbide (hard); see from the cost of materials followed by green silicon carbide, black silicon carbide, white fused alumina, the abrasive can be made around these inorganic grinding tools, including magnesite, ceramics and the like; organic abrasive tools, including phenolic, unsaturated resins, and epoxy, etc. (also includes sandpaper), which constitute the abrasive grinding tools common abrasive tool.
2, super abrasive
Belongs superabrasive diamond abrasive, its processing history is a relatively long, but as more use, is three decades of a large number of industrial production, the hardness of 8000-10000 kgf / mm 2; hardness is the highest and the processing of the material is micro cutting mechanism, so it is the preferred cutting tools, in recent years has increased its production scale and reduce industrial costs, high efficiency (which is five times more than ordinary), good processing effect (can for demanding polishing materials), thus, its increasingly widespread application. Diamond grinding tools are metal, resin, ceramic, etc. It is classified according to the type of binding agent, metal grinding tools are mainly include iron-based, these types of copper-based, cobalt-based, it It determines the processing costs of different types of materials, as the use of grinding tools, from the most coarse particle size (20 #), often to the fine grain size up to 400 #, were using; which is characterized by long life, but the cost will be higher. Resin abrasive tool, due to the relatively low production costs, application to be relatively more, it is now also used for coarse grinding to polishing, grinding and polishing in terms of fine-grained is its biggest advantage; ceramic diamond grinding tool is recent In the fastest growing tool, its processing performance, and take a long metal finish, avoid short resin finish, technically good advantage, but because of cost reasons, have not seen used in the renovation of the stone.