Ferrochrome Ferroalloy FeCr65C0.15 Block Steelmaking Industry Ferrochrome

An iron alloy with chromium and iron as the main components. It is one of the main alloying agents used in the iron and steel industry. In addition to the main components of chromium and iron, it also contains impurities such as carbon, silicon, sulfur, and phosphorus. Ferrochromium contains 55% to 75% chromium, and is divided into high carbon (4% to 10% C), medium carbon (0.5% to 4% C), low carbon (>0.15% to 0.5% C) and low carbon (>0.15% to 0.5% C) according to the carbon content. Micro-carbon (≤0.15%C) ferrochromium. High carbon ferrochromium is also called carbon ferrochromium, and medium, low and micro-carbon ferrochromium is also called refined ferrochromium. A high-carbon ferrochromium produced from chrome ore with a low chromium-to-iron ratio, containing 50% to 55% of Cr is called charge grade ferrochromium, and nitrogen-containing ferrochromium containing N2% to 10% is used as a nitrogen alloying agent. Also known as ferrochromium nitride.

Ferrochrome is divided into high carbon ferrochrome according to different carbon content, including charging grade ferrochrome (C≦10%), medium carbon ferrochrome (C≦4.0%), low carbon ferrochrome (C≦0.5%), micro carbon Ferrochrome (C≦0.15%), etc. Commonly used are silicon-chromium alloy, ferrochromium nitride and so on. Ferrochromium is mainly used as an alloying additive in steelmaking, and in the past it was added at the later stage of refining in steelmaking. The smelting of low carbon steel such as stainless steel requires the use of low and micro-carbon ferrochromium, so the production of refined ferrochromium was once developed on a large scale. Due to the improvement of the steelmaking process, when using the AOD method (see out-of-furnace refining) to produce stainless steel and other steel grades, carbon ferrochromium (mainly charging grade ferrochromium) is used to charge the furnace, so it is only necessary to add low and micro chrome in the later stage. Carbon ferrochromium adjusts the composition, so the focus of ferrochromium production is to refine carbon ferrochromium.

The addition of chromium to steel can significantly improve the oxidation resistance of steel and increase the corrosion resistance of steel. Chromium is contained in many steels with special physical and chemical properties. Chromium in steel is added with ferrochromium. Ferrochromium is mainly used in the production of stainless steel, ball bearing steel, tool steel, nitrided steel, heat-strength steel, quenched and tempered steel, carburized steel and hydrogen-resistant steel. This is because chromium plays a decisive role in stainless steel and determines the performance of stainless steel. There is only one element in the genus, which is chromium, and each stainless steel must contain a certain amount of chromium. Application areas: The corrosion resistance of stainless steel mainly comes from chromium. Experiments show that only when the chromium content exceeds 12%, the corrosion resistance of steel will be greatly improved. Therefore, the chromium content in stainless steel is generally not less than 12%. Therefore, the supply and demand of chromite is closely related to the supply and demand of the stainless steel market. The ferrochrome should be lumpy.

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