Products Parameters
| Type | Chemical Composition (%) | ||||
| Si | Al | S | P | C | |
| ≤ | |||||
| Silicon Slag 35-38 | 35-38 | 5 | 0.1 | 0.05 | 5 |
| Silicon Slag 38-42 | 38-42 | 5 | 0.1 | 0.05 | 5 |
| Silicon Slag 42-47 | 42-47 | 5 | 0.1 | 0.05 | 5 |
| Silicon Slag 50-55 | 50-55 | 5 | 0.1 | 0.05 | 5 |
| Silicon Slag 55-60 | 55-60 | 5 | 0.1 | 0.05 | 5 |
| Silicon Slag 60-65 | 60-65 | 5 | 0.1 | 0.05 | 5 |
| Size | 10-50mm 90% min/10-70mm 90% min /10-100mm 90% min | ||||
Products Description
Silicon slag is a by-product produced in a specific industrial process and has a wide range of application values. The silicon content of silicon slag is usually between 30% and 70%, and it contains other elements such as aluminum, sulfur, phosphorus and carbon.
Silicon slag is mainly produced in the following industrial processes, such as blast furnace smelting: in the blast furnace, iron ore is pretreated and enters the blast furnace with coke. At high temperatures, iron ore is reduced to iron and burned with coke, and slag produced in the furnace flows downstream, including silicon slag. There is also electric furnace smelting: the electric furnace heats ferrous alloys, scrap steel and other metal materials to the melting point and processes them by arc heating. In the smelting process, the furnace charge melts into liquid metal after heating, and at the same time, slag will float from the metal surface and be collected, among which silicon slag is a kind of slag residue collected in the smelting process. In addition, in the process of aluminum electrolysis, the alumina solution with a mass concentration of about 500-600 g/L is electrolyzed in the electrolytic cell and converted into aluminum and by-produced oxides and silicon slag. The output of silicon slag will be different due to the electrolysis process and raw materials.
Silicon slag has many uses in industry, for example, silicon slag can be used as a deoxidizer in the steelmaking process to reduce the oxygen content in the melting and casting process. Silicon slag is also a cheap raw material for many silicon industries, such as the production of silicone. Silicon slag can improve the furnace temperature, increase the fluidity of molten iron and optimize the toughness and cutting ability of castings. In the aspect of flue gas desulfurization, the basic oxide in silicon slag can react with sulfur dioxide to generate sulfate, so it is also used for flue gas desulfurization. Silicon slag can also be used in building materials, friction agents, volcanic ash treatment agents and other fields, and has been applied in metallurgy, cement production and other industries.
Silicon slag can be divided into industrial silicon slag, solar silicon slag and semiconductor silicon slag according to different sources and uses. Another classification is based on the different silicon content, such as ferrosilicon slag and metallic silicon slag. Silicon slag is an important industrial by-product with wide application value. Through proper treatment and utilization, resources can be effectively utilized and environmental pollution can be reduced.
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