Chinese Manufacture Ferrochrome Slag

1. Ingredient List

2. Related introduction

Chromium is a lustrous gray metal, density 7.2, melting point 1857 ℃, boiling point 2672 ℃, ductile, but containing oxygen, hydrogen, carbon and nitrogen and other impurities become hard and brittle. Chromium is chemically inactive, stable to oxygen and water vapor at room temperature, chromium begins to react with oxygen at higher than 600 ℃, but when the surface is born after the oxide film, the reaction will be slow, when heated to 1200 ℃, the oxide film is destroyed, the reaction becomes fast again. At high temperatures, chromium reacts with nitrogen, carbon, and sulfur. Chromium can act with fluorine at room temperature. Chromium can dissolve in hydrochloric acid, sulfuric acid, and perchloric acid, and passivate after meeting nitric acid, and no longer react with acid. Chromium can form alloys with magnesium, titanium, tungsten, zirconium, vanadium, nickel, tantalum, and yttrium. Chromium and its alloys have strong anti-corrosion ability.

Chromite

About 50 kinds of chromium-containing minerals have been found in nature, which belongs to the oxide group, chromate group, and silicate group respectively. There are also a few hydroxides, iodates, nitrides, and sulfides. Among them, chromium nitride and chromium sulfide minerals are only found in meteorites. The chromium minerals with industrial value all belong to the chromium spinel group of minerals, their chemical formula is (Mg, Fe2+)(Cr, Al, Fe3+)2O4 or (Mg, Fe2+)O(Cr, Al, Fe3+)2O3, and their Cr2O3 content is 18% to 62%.

The common chromium minerals are.

(1) chromite, the chemical composition of (Mg, Fe) Cr2O4, between ferrous chromite (FeCr2O4, containing FeO 32.09%, Cr2O3 67.91%) and magnesium chromite (MgCr2O4, containing Mg 20.96%, Cr2O3 79.04%), usually some people will be ferrous chromite and magnesium chromite are also called chromite. Chromite is an equiaxed crystal system, crystals are fine octahedral, usually granular and dense massive aggregate, color is basalt, brown stripes, semi-metallic luster, hardness 5.5, density 4.2 ~ 4.8, with weak magnetic. Chromite is a magmatic mineral, produced in ultra-basic rocks, when the ore-bearing rocks suffer weathering damage, chromite is often transferred into the sand ore. Chromite is the most important mineral raw material for chromium refining, iron-rich poor quality ore can be used as advanced refractory materials.

(2) Chromium-rich crystals, also known as chromium-iron spinel or aluminum chromite, the chemical composition of Fe (Cr, Al) 2O4, containing Cr2O3 32% ~ 38%.

(3) Hard chromium spinel, the chemical composition of (Mg, Fe) (Cr, Al) 2O4, containing Cr2O3 32% ~ 50%. The morphology, physical properties, genesis, production, and use of chromium-rich crystals and hard chromium spinel are the same as those of chromite. The methods of industrial production of chromium metal are aluminum reduction, silicon reduction, carbon reduction, and electrolysis.

Uses of chromite ore

Chromium is one of the important strategic materials. It is hard, wear-resistant, high-temperature resistant, and corrosion-resistant. The uses of its chromite ore are: 

(1) In the metallurgical industry? Chromite is mainly used to produce ferrochrome alloys and chromium metal. a chromium-iron alloy as an additive to steel production of a variety of high-strength, corrosion-resistant, wear-resistant, high-temperature-resistant, oxidation-resistant special steel? such as stainless steel, acid-resistant steel, heat-resistant steel, ball bearing steel, spring steel, tool steel, etc. b Chromium metal is mainly used to smelt special alloys with elements such as cobalt, nickel, and tungsten. These special steels and special alloys are indispensable materials for aviation, astronautics, automotive, shipbuilding, and defense industry production of guns, missiles, rockets, naval vessels, etc.

(2) In the refractory materials? Chromite is used to manufacture chrome bricks, chrome-magnesium bricks, and other special refractory materials.

(3) In the chemical industry is mainly used to produce sodium dichromate? And then to make other chromium compounds? Used in pigment, textile, electroplating, tanning, and other industries? Also can make catalysts and catalysts, etc. Therefore? There are also three kinds of sales channels for chromite ore? namely? Metallurgical industry, refractory industry, and chemical industry. The following are the uses and smelting processes of ferrochrome and chromium salt introduced by the use of chromite in the metallurgical industry

Chromium is one of the important strategic materials, which is widely used in the metallurgical industry, refractory industry, and chemical industry due to its hard, wear-resistant, high temperature resistant, and corrosion-resistant properties.

3.Product production

4. Quality control

5. Support sea , land and air transportation

6. Support express delivery

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