Who knows the method for determining the total iron content in iron ore?
The routine analysis of iron ore is a simplified analysis of the determination of total iron (TFe), ferrous iron, soluble iron, silicon, sulfur, phosphorus. The analysis of the money also includes: alumina, calcium oxide, Magnesium Oxide, manganese oxide, arsenic, potassium, sodium, vanadium, iron, chromium, nickel, cobalt, bismuth, silver, barium, strontium, lithium, and rare dispersed elements. Absorb water, combine water, burn down, carbon dioxide and so on. This section focuses on the determination of total iron.
Iron ore is the basic raw material of iron and steel industry, can be smelted into pig iron, wrought iron, iron alloy, carbon steel, alloy steel, special steel, etc.. Used in blast furnace iron ore, the total iron TFe (total iron content) = 50%, S = 0.3%, P = 0.25%, Cu = 0.2%, Pb = 0.1%, Zn = 0.1%, Sn = 0.08%, and mined the original iron ore grade is only 20% ~ 40%. by enrichment, can be the ore grade is increased to 50% to 65%. China imports large quantities of iron ore from abroad every year.
Iron is one of the most widely distributed metal elements in the earth, with an average content of 5% in the earth's crust and fourth after oxygen, silicon and aluminum in the element abundances. Iron minerals in nature are known to have 300 kinds, but in the current technical conditions, with industrial utilization value is mainly magnetite (iron containing 72.4% Fe3O4 (Fe2O3), hematite iron containing 70% (FeCO3) and siderite iron containing 48.2% (Fe2O3 / nH2O), limonite iron containing 48% ~ 62.9%).
