Blast furnace slag is different from granulated slag. Blast furnace slag refers to the waste slag produced during the iron smelting process in the blast furnace, while granulated slag is the solid waste produced during the treatment of wastewater or other liquids in industrial production and metallurgical processes.
1. The generation and properties of blast furnace slag
Blast furnace slag is a solid waste produced during the iron smelting process in a blast furnace. In the blast furnace, raw materials such as iron ore, coke and limestone are added to the blast furnace. After a high-temperature reduction reaction, iron and some impurities are produced. These impurities are combined with impurities in the limestone and residues of incomplete combustion in the coke. It's blast furnace slag.
The chemical composition of blast furnace slag is complex, containing a certain amount of SiO2, MgO, CaO, Al2O3, etc., as well as a small amount of iron elements such as FeO and Fe2O3. Because blast furnace slag is produced at quite high temperatures, it has a high degree of crystallization and a high degree of hardness stability.
Blast furnace slag is an important industrial raw material that can be used as construction materials such as cement, bricks, and road paving. It can also be used as landfill material and road base material.
2. The generation and properties of granulated slag
granulated slag refers to the solid waste produced when wastewater or other liquids are processed in industrial production and metallurgical processes. The composition and properties of granulated slag are related to the specific industrial production or metallurgical process, and some by-products are also produced when produced.
The chemical composition of granulated slag is also relatively complex and has a lot to do with the specific industrial production process, but it generally contains certain inorganic substances, organic substances and microorganisms. The color of granulated slag may appear dark gray or black, and because the process of producing granulated slag usually involves the presence of harmful substances such as petroleum and chemicals, granulated slag also poses a certain risk of environmental pollution.
Because the composition and properties of granulated slag are unstable, it is troublesome to handle. Some common treatment methods include solidification, stabilization, chemical treatment, etc. The treated granulated slag can be used for mixing cement, manufacturing building materials, landfill, etc.
3. Summary
Blast furnace slag and granulated slag are two different wastes with very different origins and properties. Blast furnace slag is produced at high temperatures and has a high degree of crystallization and hardness, and can be used as building materials and landfill materials; while granulated slag is produced by processing wastewater during industrial production and metallurgical processes, and its composition is unstable. It needs to be processed before being used in related industrial production processes.
