Start with the raw materials to check the quality of ferro silicon 75
Silica is the raw material for the production of ferrosilicon 75. Therefore, the quality of silica also determines the quality of ferrosilicon 75. So how to judge the quality of silica? The requirement is that the silicon content in silica should be greater than 97%, and Silica often produces an element called aluminum oxide during smelting. This element not only affects the slag discharge problem during steelmaking, but also increases the aluminum element in ferrosilicon, greatly affecting the quality of ferrosilicon.
The content of calcium oxide and magnesium oxide affects the quality of ferro silicon 75
Usually the content of calcium oxide and magnesium oxide in ferrosilicon should be less than 1%. If it is greater than this range, the amount of smelting slag will increase during steelmaking and the erosion of the taphole will greatly affect the quality of ferrosilicon 75.
The particle size of silica is also a factor affecting the quality of ferro silicon 75
The particle size of silica is also a factor that affects the quality of ferrosilicon 75. If the particle size of silica is too large, the reaction speed during smelting will slow down, while if it is too small, there will be more powder, which will affect the air permeability of the surface of ferrosilicon 75. So what is the particle size? Is it suitable? It is required that the silica particle size used to produce ferrosilicon 75 should be 60 to 120 mm, of which the size greater than 80 mm should be greater than 50%. The small ferrosilicon furnace requires the silica particle size to be 25 to 80 mm, of which the size greater than 40 mm should account for 50%.
