Utilization value of iron-containing wastes such as steel slag

Steel slag is one of the main by-products and wastes produced in steelmaking process, and the other is blast furnace slag. Steel slag consists of oxides formed by oxidation of manganese, silicon, sulfur and other impurities in pig iron during smelting and various salts formed by the reaction of these oxides with solvents. Because of its rich components, strong fluidity after melting and relatively low melting temperature, it can be reused as a secondary resource.

The utilization value of steel slag lies in that it contains a certain amount of steel particles and iron powder, that is, recovering steel particles and iron powder is the main way to utilize steel slag. The selection process of steel slag refers to the treatment process of steel slag. The main purpose of this process is to extract steel particles and iron blocks from steel slag.

Iron-containing wastes from iron and steel production (including dust and mud, ore return, magnetic separation steel slag powder, mill scale, sludge, etc.). ) is processed into cold-pressed particles. 30-50 tons of pellets can be produced per ton of metallurgical dust binder, and the curing mode can be drying or natural drying. After drying, the strength is above 65,438+000 kg/granule, and it is resistant to high temperature of 65,438+0,000 degrees Celsius, waterproof and moisture-proof. Without sintering, it can be directly used as slagging agent, coolant and cosolvent for smelting or steelmaking of blast furnace and electric furnace charge.