Chromium silicon alloy mainly composed of silicon, chromium and iron, generally containing Cr>30%, Si>35%, and the remainder is iron and a small amount of impurities. It is mainly used as an intermediate alloy for the production of medium, low and micro-carbon ferrochrome by the electro-silicon thermal method. It can also be used as a deoxidizer (instead of ferrosilicon) and a chromium additive in steelmaking.
Chrome ferro alloy The main components are chromium and iron, and also contain impurities such as carbon, silicon, sulfur, and phosphorus. The chromium content is generally 55%~75%. It is an important alloy additive for steelmaking. High-carbon ferrochrome is used as an alloying agent for ball steel, tool steel, mold steel and high-speed steel. Medium and low-carbon ferrochrome is used to produce medium and low-carbon structural steel and carburizing steel. Micro-carbon ferrochrome is used to produce stainless steel, acid-resistant steel, heat-resistant steel and electric heating alloys.
The principle and advantages of chromium Silicon alloy in producing ferrochrome
Strong reducing property of silicon:
Silicon-chromium alloy contains a high content of silicon, and silicon has a strong reducing property. Under certain conditions, silicon can undergo redox reactions with the oxides of chromium and iron in chrome ore, reducing chromium and iron from their oxides to form ferrochrome.
Can reduce production costs:
Using silicon-chromium alloy to produce ferrochrome, especially medium, low and micro-carbon ferrochrome, is more economical than using other methods such as industrial silicon or ferrosilicon as a reducing agent. Because silicon-chromium alloy can be made from relatively cheap raw materials through a specific process, using it to produce ferrochrome can effectively reduce the overall production cost.
Adjust alloy composition:
Silicon-chromium alloy itself contains chromium and iron elements. When producing ferrochrome, it can be used as an intermediate alloy to adjust the composition of the final product ferrochrome, so that the chromium content and iron content in the ferrochrome meet the standards required for different application scenarios. At the same time, part of the silicon in the silicon-chromium alloy will enter the slag in the form of after the reaction. By adjusting the composition and properties of the slag, it can be more conducive to the reaction and the separation of the alloy.
Low-carbon advantage in producing low-carbon ferrochrome:
When producing low-carbon ferrochrome, using silicon-chromium alloy as a reducing agent can reduce the introduction of carbon compared to using a reducing agent with a higher carbon content (such as coke), which is more conducive to controlling the carbon content in the ferrochrome product and producing low-carbon or micro-carbon ferrochrome products that meet the requirements, meeting the production needs of stainless steel and other steel types that have strict requirements on carbon content.
