Method for smelting silicon manganese alloy through microwaves

Abstract

The invention relates to a method for smelting silicon manganese alloy through microwaves. The method comprises the following steps that 10, a raw material containing manganese is placed into a microwave smelting furnace to be smelted to obtain a liquid manganese mixture; 20, a raw material containing silicon is placed into the microwave smelting furnace to be smelted to obtain a liquid silicon mixture; and 30, the liquid manganese mixture obtained after smelting is carried out in the step 10 and the liquid silicon mixture generated in the step 20 are mixed and remolten to obtain the silicon manganese alloy. The microwave smelting furnace is adopted for carrying out smelting, the smelting furnace can rotate automatically, the smelted raw materials in a furnace body are heated uniformly, the chemical reaction rate in the furnace is increased, the smelting speed is increased, the smelting cost is saved, and furnace interior heat transfer and mass transfer speed is increased. The reduction speed in the furnace is increased, the reactions are active, the three reactions can also generate silicon dioxide particles with the large specific area, and in the process of being affected with coke, the contact area is increased, which is beneficial for reducing silicon.

Description

technical field [0001] The invention belongs to the field of microwave smelting, in particular to a method for microwave smelting silicon-manganese alloys. Background technique [0002] In the prior art, when smelting high-silicon-silicon-manganese alloys, the chemical process performed in the high-temperature molten pool of silicon-manganese alloys [0003] There are many reactions and the process is more complicated. The following reactions are mainly analyzed: [0004] SiO2+2C=Si+2CO (1) T=1660℃ [0005] MnO+C=Mn+CO (2) T=1404℃ [0006] FeO+C=Fe+CO (3) T=712℃ [0007] The above three reduction reactions are all endothermic reactions, and the initial reduction reaction temperature of manganese and silicon is relatively high. Due to the difference in the initial reduction temperature, the smelting process of silicon-manganese alloy is essentially that iron and manganese are first reduced in the smelting raw materials to generate MnC similar to high-carbon ferromanganese...

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Problems solved by technology

Although the process of adding ferrosilicon has solved some difficulties, there are still disadvantages such as low silicon content in the furnace, high volatilization rate and slag rate of manganese and silicon, poor control of furnace conditions, and high cost.

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