What kind of coke to choose when producing ferrosilicon
Grinding ferrosilicon into powder is what we call ferrosilicon powder. Therefore, ferrosilicon and ferrosilicon powder have a direct relationship. In order to ensure the quality of ferrosilicon powder, high-quality ferrosilicon must be produced. The main raw materials used in the smelting of ferrosilicon are coke, steel chips, quartz, made by smelting in an electric furnace. But must grasp the quality of raw materials. So, what factors to pay attention to when choosing coke, the following will be explained to this problem.
Fixed carbon content in coke is more than 82%, ash content is lower, generally requires less than 8%. The ash content in coke is too high, which makes the material surface of the furnace slagged and sintered easily and affects the air permeability of the material surface. The ash content in coke is also an important reason for the increase of slag quantity and the change of slag viscosity. Volatiles are 6-12%. Coke with high volatile content generally has low mechanical strength. Meanwhile, in the heating process, volatile content is easy to escape. From the perspective of ensuring that coke has high fixed carbon and mechanical strength, coke should be required to have a lower volatile content. However, considering that the coke with high volatile content is usually higher than the resistance, the volatile content is generally not limited.
In the process of smelting ferrosilicon, the size of the high temperature in the furnace, to a large extent depends on the electrode insertion depth, burden resistance, especially the coke resistivity is an important factor affecting the electrode insertion depth, larger than the resistance of electrodes deep and steady, which can expand the crucible area, small heat loss, coke resistivity in addition to related to grain size, mainly associated with the structure and types of itself. Suitable particle size composition, coke; Particle size composition is an important factor affecting charge specific resistance and air permeability. Coke with large particle size has low specific resistance, small reaction surface, low reduction capacity, strong charge conductivity when added into the furnace, difficult electrode insertion, and increased heat loss. The coke with small particle size has a higher resistance and a larger reaction surface, so adding it into the furnace is conducive to deep electrode insertion and reduction reaction. However, when the coke with too small particle size is put into the furnace, it is easy to make the air permeability of the sintering surface become worse and the burning loss is serious.
Hope that we can through the introduction of the above information, on the one hand, can more clearly understand that in the production of ferrosilicon, ferrosilicon powder on why to use coke, coke in one of the important, on the other hand can understand what problem should note when choosing coke, what kind of coke to make high quality ferrosilicon smelting, ferrosilicon powder. Whether you want to buy ferrosilicon powder, or want to buy other kinds of ferrosilicon products, you can contact our company, our company has the ability, also has the strength to meet your needs.
