In the ferroalloy industry, how to effectively handle the waste generated during the production process and achieve maximum resource utilization has always been an important issue of concern. The use of micro silicon powder and small particle silica balls as silicon sources to produce 70 undoubtedly provides us with a highly innovative and practical solution. Let's take a detailed look at this unique method for producing 70 silicon ferroalloy.
Firstly, it is necessary to add a certain proportion of binder and water to the micro silica powder and small particle silica. Specifically, the added binder is 2% to 12% of the mass of micro silica powder, while water is 3% to 15% of the mass of micro silica powder, and then they are mixed evenly. Next, under a pressure of 5 to 30 tons, press the mixed material into pellets.
Subsequently, under a reducing atmosphere, the pellets obtained in the first step are dried under specific temperature conditions. The temperature range here is 100 to 300 degrees Celsius. After drying, the dried pellets and carbon reducing agent are loaded into a metallurgical furnace with a surface temperature of 800 to 1200 degrees Celsius according to a certain mass ratio. During the process of pellets and carbon reducing agents descending from the metallurgical furnace mouth to the high-temperature area, they will complete pre roasting. Next, the pellets and carbon reducing agents are smelted in the high-temperature area of the metallurgical furnace, at temperatures ranging from 1800 to 2500 degrees Celsius, for a smelting time of 0.5 to 2 hours. Moreover, during the smelting process, iron containing raw materials such as steel chips, rolled iron sheets, and iron concentrate pellets can also be added to obtain silicon iron alloy melt.
The final step is to refine the 70 silicon iron alloy melt obtained in the second step outside the furnace, so as to successfully produce 70 silicon iron alloy.
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