What is steel? What is the steel industry?

Steel is also an iron-carbon alloy, with a carbon content generally below 2.0% and containing other elements (such as silicon, manganese, sulfur, phosphorus, etc.). There are also individual steel carbon content greater than 2.0%, such as abrasive steel (Cr12) carbon content in 2.0%~2.3%. The main methods to obtain steel are converter, electric furnace and open furnace, but the open furnace steelmaking process belongs to the elimination process. Steel is a metal material widely used, a small part of the steel is used for casting or forging mechanical parts, most of which are rolled into various specifications of steel.

The iron and steel industry refers to the industrial industry with black metal (iron, chromium, manganese three metal elements) as the main mining, smelting machine rolling processing object. Modern iron and steel industry is a huge industrial production system, the main cold-winning sectors include mining, mineral processing, sintering, pelletizing, steelmaking, steel rolling and so on; Poster frame a large number of auxiliary production departments, such as coking, refractories, carbon, machine repair, power, transportation, etc.