Green silicon carbide micropowder can reduce the appearance of impurity castings. The role of silicon carbide in use: it can better improve the mechanical properties of a grade, reduce the defects of cast iron in the past, reduce the rate of waste outside the work, reduce the super direction of shrinkage cavity, completely It can replace ferrosilicon, so it has better economic benefits. However, everything has two sides. It is good and it also has a bad side, that is, it will pollute the environment. What kind of pollution will it specifically cause to the environment?
Hazardous substances in the silicon carbide production process mainly include the following categories
1. Light pollution: the production process requires ignition operations, that is, the smelting furnace body is burned and smelted in the open air. However, air pollution is the main issue. As for how far the damage is, it depends on the wind direction of the factory area. Such smelting projects are not allowed to be approved at present, and are restricted by the state.
2. Air pollutants: dust, smoke, carbon monoxide (a small amount), carbon dioxide (a large amount), depending on the impurities contained in the raw materials used, it may also contain sulfur dioxide, nitrogen oxides, etc.
3. Water pollution: mainly due to high salt content. If there are farmlands and lakes nearby, and the factory area mainly treats sewage in the form of external discharge, the pollution can be imagined.
Green silicon carbide micropowder, as one of the common abrasives in the market, is made of petroleum coke and high-quality silica as the main raw materials, adding salt as an additive, and smelting through a resistance furnace at high temperature. Its hardness is between corundum and diamond, and its mechanical strength is higher than that of corundum.