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Chromite powder

Chromite powder

  • Classification:铬铁矿粉
  • Views:second
  • Date of issue:2019-11-29
  • Product overview
  • Performance characteristics
  • Technical Parameters

Chromite powder is an oxide mineral of chromium and iron. There are high-carbon ferrochromium (containing 4 to 8% carbon), medium-carbon ferrochromium (containing 0.5 to 4% carbon), low-carbon ferrochromium (containing 0.15 to 0.50% carbon), and micro-carbon ferrochrome (containing carbon to 0.06%), ultra-fine carbon ferrochrome (less than 0.03% carbon), metallic chromium, silicon chromium alloy. It is quite hard and has a black semi-metallic sheen. Chromite is the main source of metallic chromium and can also be used in high temperature refractory materials. Chromite is generally a lumpy or granular aggregate. The chemical composition of chromite is FeCr2O4, an oxide mineral of the crystallographic equiaxed system. The iron in the composition can often be partially replaced by magnesium. When Mg is mainly used, it is called magnesiochromite. With a normal spinel structure. Chromite Cr2O3 content is 67.91%. Is the main source of industrial chromium, can also be used to make high temperature refractory materials, such as chromium brick. The Morse hardness is 5.5 to 6, and the specific gravity is 3.9 to 4.8. With weak magnetism. Chromite is only produced in ultrabasic or basic rocks. Large chromite deposits are mainly produced in Transvaal, South Africa, near Guylow in Zimbabwe, Svidlovsk region in Russia, and Cuba. China's chromite ore is produced in Tibet, Gansu, and Shaanxi.

Magnesia-chrome bricks and chrome-magnesia bricks are used in metallurgy, glass and cement industries. Due to the use of chromium-containing products in cement rotary kiln, hexavalent chromium compounds will be generated. For environmental protection reasons, they are gradually replaced by magnesium-aluminum spinel products or dolomite products. In addition, it is used for refining metallic chromium, producing ferrochrome, stainless steel, and manufacturing dichromate.

Chromium ore is an indispensable mineral resource for the development of metallurgy, national defense, chemical and other industries. It is mainly used in the production of stainless steel and various alloy steels and alloys in the metallurgical industry. It is also widely used in glass, ceramics, and refractories. include:

Casting grade: for large-scale steel castings, foundry sand, ladle drainage sand

Metallurgical grade: used to produce high carbon ferrochrome and low micro carbon ferrochrome

Refractory / chemical grade: used to produce refractory materials such as magnesia chrome sand, magnesia chrome brick

Ferrochrome is an iron alloy composed of chromium and iron, and is an important alloy additive for steelmaking. Chromite for smelting ferrochrome generally requires Cr2O340 ~ 50%, and the ratio of chromium to iron is greater than 2.8. Mass-produced "load-grade ferrochromium" containing 50% chromium, using Cr2O3 and ore with a low ratio of chromium to iron.


Last:Chromite powder2019-11-29


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