Ferroalloy melting process
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An intermediate alloy composed of iron and one or several elements, mainly used in steel manufacturing. In the steel industry, all master alloys used in steelmaking, whether containing iron or not (such as calcium silicide), are generally also referred to as \"ferroalloys\". *It is also common to include certain pure metal additives and oxide additives as well. Ferroalloys are generally used as: ① deoxidizers. During the steelmaking process, oxygen is removed from the molten steel, and certain ferroalloys can also remove other impurities in steel such as sulfur and nitrogen. ②Alloy additives. According to the composition requirements of the steel grade, alloying elements are added to the steel to improve its properties. ③Nurturing agent. Added to the molten iron before casting cast iron to improve the crystalline structure of the castings. In addition, it is also used as a reducing agent for producing other ferroalloys and non-ferrous metals via the metal thermal reduction method ； Alloying additives for non-ferrous alloys ； It is also used in small quantities in the chemical industry and other industries. There are various melting techniques; let’s discuss them.
:Lol, alloys such as ferrosilicon, ferromanganese, and ferrochrome are produced using the carbothermal reduction method in electric arc furnaces； Ferroniobium, ferromolybdenum, and ferrotungsten are mostly produced by the thermite reduction method~~~
The production methods of ferroalloys can be classified in the following ways: First, by production equipment: 1. Blast furnace method – similar to iron production using blast furnaces; 2. Electric furnace method – including reduction electric furnaces (induction furnaces) and refining furnaces (arc furnaces); 3. Out-of-furnace (metal heat) method; 4. Oxidizing converter method; 5. Vacuum resistance furnace method. Second, by source of heat: 1. Carbon heating method; 2. Electric heating method; 3. Electro-silicon heating method; 4. Metal heat method. Third, by operation method and process: 1. Flux method; 2. Flux-free method; 3. Continuous smelting method; 4. Intermittent smelting method; 5. Slag-free method; 6. Slag-containing method
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