Product Overview/产品概述:
High carbon ferrochrome is mainly used in stainless steel production, among which 200 series stainless steel contains about 16% chromium, 300 series stainless steel contains about 25% chromium, and 400 series stainless steel contains about 14% chromium. 300 series stainless steel, which has a large demand for ferrochrome, also accounts for a large proportion of stainless steel production. It is used as an alloying agent for ball steel, tool steel and high-speed steel with a high carbon content to improve the hardenability, wear resistance and hardness of steel; it is used as an additive for cast iron to improve the wear resistance and hardness of cast iron, and at the same time make cast iron have good heat resistance; it is used as a chromium-containing raw material for the slag-free production of silicon-chromium alloy and medium, low and micro-carbon ferrochrome; it is used as a chromium-containing raw material for the electrolytic production of metallic chromium; it is used as a raw material for smelting stainless steel by oxygen blowing.
Product Introduction/产品介绍:
The smelting methods of high carbon ferrochrome include blast furnace method, electric furnace method, plasma furnace method, etc. Using blast furnace can only produce special pig iron with chromium content of about 30%. High carbon ferrochrome with high chromium content is mostly smelted in a submerged arc furnace using flux method.
The basic principle of smelting high carbon ferrochrome by electric furnace method is to use carbon to reduce the oxides of chromium and iron in chromium ore. The starting temperature of carbon reduction of chromium oxide to generate Cr2C2 is 1373K, the starting temperature of the reaction to generate Cr7C3 is 1403K, and the starting temperature of the reaction to generate chromium is 1523K. Therefore, when carbon reduces chromium ore, chromium carbide is obtained instead of metallic chromium. The carbon content in ferrochrome depends on the reaction temperature. It is easier to generate carbides with high carbon content than carbides with low carbon content.
