use of chromium ferro

Ferro chromium is divided into high carbon chromium iron by different carbon content, including loading grade chromium iron (C≦10%), medium carbon chromium iron (C≦4.0%), low carbon chromium iron (C≦0.5%), microcarbon chromium iron (C≦0.15%) and so on. Also commonly used are silicon chromium alloy, chromium nitride iron and so on. Chromium iron is mainly used as an alloy additive for steelmaking and has been added in the late stages of steelmaking in the past. Smelting stainless steel and other low-carbon steel species, must use low- and micro-carbon chromium iron, so refined chromium iron production was once a large-scale development. Due to the improvement of steelmaking process, now with AOD method (see furnace refining) and other production of stainless steel and other steel species, with carbon chromium iron (mainly loading grade chromium iron) furnace, so only need to be lowered in the later stage, micro-carbon chromium iron adjustment composition, so now the production focus of chromium iron production is to make carbon chromium iron.

The main features of ferro chromium

Chromium is a shiny gray metal with a density of 7.2, a melting point of 1857 degrees C and a boiling point of 2672 degrees C, which is stretchy, but becomes hard and brittle when containing impurities such as oxygen, hydrogen, carbon and nitrogen. The chemical properties of chromium are inactive, oxygen and water vapor are stable at room temperature, chromium at a higher than 600 degrees C when the beginning of the reaction with oxygen, but when the surface is born with oxide film, the reaction is slow, when heated to 1200 degrees C, oxidation film is destroyed, the reaction is faster again. At high temperatures, chromium reacts with nitrogen, carbon and sulfur. Chromium can work with fluorine at room temperature. Chromium is soluble in hydrochloric acid, sulphuric acid and perchloric acid and passivates after nitric acid and no longer reacts with acid. Chromium can form alloys with magnesium, titanium, tungsten, tantalum, vanadium, nickel, tantalum, tantalum. Chromium and its alloys are highly resistant to corrosion.

Application of ferro chromium

Chromium is one of the most important strategic materials. With hard, wear-resistant, high temperature, corrosion-resistant and other characteristics. The uses of its chromium iron ore are:

Chromium is one of the important strategic materials, because of its hard, wear-resistant, high temperature, corrosion resistance and other characteristics, in the metallurgical industry, refractic materials and chemical industry has been widely used.