Metal silicon powder for raw material requirements
By analyzing the name of silicon metal powder, we can clearly understand that the silicon metal grinding into powder is silicon metal powder. Therefore, if you want to produce silicon metal powder, you must purchase high quality silicon metal. Although, smelting metal silicon raw materials are mainly silica, carbonaceous reducing agent. But in order to ensure the quality of silicon metal, it is necessary to strictly control the raw materials.
SiO2>99.0%, Al2O3<0.3%, Fe2O3<0.15%, CaO<0.2%, MgO<0.15%; The particle size is 15 ~ 80mm.
The principle of choosing carbonaceous reducing agent is: high fixed carbon, low ash content, good chemical activity. Usually petroleum coke or asphalt coke with low ash content is used as reducing agent. However, due to the two kinds of coke resistivity is small, poor reaction ability, so must be matched with low ash, high resistivity and strong reaction ability of charcoal (or wood) instead of part of the petroleum coke. In order to make the charge sintered, some low ash bituminous coal should be added. Must point out, overmuch or all use charcoal, not only can raise product cost, and still can make furnace condition disorder, if because of material surface sintering is poor and cause prick fire to collapse material, form high temperature reaction area, bottom of furnace is easy to open into SiC layer, give iron difficulty etc.
The above is in the smelting of silicon metal, the purchase of raw materials should pay attention to the problem, I hope that we can strictly control the production of silicon metal raw materials, to ensure the quality of silicon metal powder. Our company has been engaged in the production of metal silicon powder for many years, can according to customer requirements, to provide large quantities of high quality metal silicon powder. At the same time can also rely on the understanding of metal silicon powder for many years, to answer your doubts about metal silicon powder, provide more relevant information.
