Green silicon carbide powder is one of the most common abrasives on the market. It is made of petroleum coke and high-quality silica as the main raw materials, with salt as an additive, and is smelted at high temperature in a resistance furnace. Its hardness is between corundum and diamond, and its mechanical strength is higher than that of corundum.
Green silicon carbide powder can reduce the appearance of impurities in castings. When used, green silicon carbide power can improve the mechanical properties, reduce the defects of cast iron, reduce the hernia scrap rate, reduce the shrinkage cavity, and completely replace ferrosilicon, thus achieving better economic benefits. However, everything has two sides. While it is good, it also has a bad side, which is that green silicon carbide power will cause pollution to the environment. What kind of pollution will it cause to the environment?
The main types of harmful substances in the production process of silicon carbide are as follows:
1. Light pollution: The production process requires ignition, that is, the smelting furnace is burned in the open air, and there is fire. If there is a residential area nearby, it will inevitably affect the residents' daily rest. But it is mainly air pollution. As for how far the harm is, it depends on the wind direction of the factory.
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 high salt content. If there are farmlands and lakes nearby, and the factory mainly treats sewage in the form of external discharge, the pollution can be imagined.
