There are actually two types of silicon slag. One is the small-grained ferrosilicon slag ranging from 0-3 or 3-8 left behind when manually or machine-processed to the standard 10-60 particle size. Another type is the dross floating on the furnace during the smelting process when silicon metal is smelted. This is called silicon metal slag. By-products of the production of silicon metal include grass ash silicon, furnace bottom silicon, hand-picked silicon, edge silicon, silicon carbide and other silicon waste.
1. Definition of ferrosilicon slag and silicon slag
Ferrosilicon slag refers to the remaining part after ferrosilicon alloy is smelted during smelting production. Silicon slag refers to the by-product solid matter produced during the production process of silicon alloys.
2. Chemical composition of ferrosilicon slag and silicon slag
The main components in ferrosilicon slag are SiO2, Al2O3, CaO, MgO, etc., while silicon slag has SiO2 as the main component. The composition of ferrosilicon slag contains more iron oxide and calcium oxide, while silicon slag contains relatively less.
The silicon content of ferrosilicon slag is not high, and it is usually used as a furnace washer or a layer is sprinkled on the bottom of the ladle to play an isolation role. Today we will focus on metallic silicon slag. Because the content of metallic silicon slag is relatively high, it has several contents such as 50.55.60.65.70. It can be seen that the content of metallic silicon slag can actually reach the content of ferrosilicon. In addition, the price of metallic silicon slag is much cheaper than ferrosilicon. Therefore, some metallic silicon slag is now being used to replace ferrosilicon on the market.
Silicon metal slag contains a large amount of silicon metal and other elements, so it is a good deoxidizer, which has a good effect in deoxidizing and purifying molten steel. In addition, its price is low and its effect is good, so For some steel mills, it is also a good choice to reduce costs and increase efficiency.
The particle size of silicon metal slag produced is mainly powder, with particle sizes of 0-5 and 0-10. When packaging, you can choose to pack it in small bags, or you can directly add small bags to ton bags. Silicon balls are produced in standard sizes 10-50. Of course, manufacturers can also customize some indicators according to purchasing needs.
