Overview of the overall grinding of floor decoration stone using abrasives

With the development of the economy, the use of stone is more and more extensive, especially in various public places. Stone is popular with people for its graceful and luxurious posture. Its use, with the change of time, will appear aging and pollution. Such as the problem, this can be initially solved by means of cleaning, but sometimes it must be refurbished by grinding. The following is an introduction to abrasives and grinding tools, so that everyone has a preliminary understanding.

 

 

 

Classification of abrasive materials:

 

Abrasives are materials used for grinding. The current classification is general abrasives and superabrasives.

 

1, ordinary abrasive

 

Ordinary abrasives mainly include (1) corundum (brown fused alumina, white corundum, etc.), whose main chemical composition is Al2O3 (aluminum oxide), (2) silicon carbide (black silicon carbide, green silicon carbide), the main chemistry The composition is SiC (silicon carbide). Their hardness is brown fused alumina, microhardness 2000-2200 kg / mm 2; white corundum, microhardness 2200-2300 kg / mm 2; black silicon carbide, microhardness 3100-3300 kg / mm 2 ; Green silicon carbide, microhardness 3200-3400 kg / mm 2; particle size from 4 # - micro powder W0.5 (even finer), hardness order we can sort out the processing of granite is green silicon carbide, black carbonization Silicon, processing marble is white corundum (soft), black, green silicon carbide (hard); in view of the cost of materials, green silicon carbide, black silicon carbide, white corundum, can be made around these abrasives, inorganic Grinding tools, including diamonds, ceramics, etc.; organic grinding tools, including phenolic, unsaturated resins, and epoxy (also including abrasive cloth sandpaper), these abrasive tools constitute the grinding of ordinary abrasives tool.

 

 

 

2, super hard abrasive

 

Diamond abrasive is a super-hard abrasive. Although its processing history is relatively long, it is a large-scale industrial production in the past 30 years. Its microhardness is 8000-10000 kg/mm2; the hardness is the highest. In the process of processing materials, it is the mechanism of micro-cutting, so it is the preferred cutting tool. In recent years, it has a large-scale increase in production and reduction of industrial cost, high processing efficiency (more than 5 times normal), and good processing effect (may be It is used for polishing highly demanding materials. Therefore, its application is becoming more and more extensive. Diamond grinding tools are mainly metal, resin, ceramic, etc., which are classified according to the type of bonding agent. Metal grinding tools mainly include iron-based, copper-based, and cobalt-based. It determines the processing cost of different types of materials. As a grinding tool, its particle size is from the thickest (20#), often to the fineness of 400#, and it is characterized by long service life, but the cost will be higher. Resin-based grinding tools, due to relatively low manufacturing costs, have relatively large applications. They are now used for rough grinding to polishing, which is the biggest advantage in fine-grained grinding and polishing; ceramic diamond-like grinding tools are recent Among the fastest-growing tools in the year, the processing performance is long, the metal processing is long, the resin processing is short, and the technology has a good advantage. However, due to its cost, it has not been seen in the stone renovation.