Ferrosilicon 72 Metal Description
The production of high-purity ferrosilicon by the furnace material selection method is mainly carried out by refining and producing raw materials such as quartz stone, petroleum coke, wood block, charcoal and silicon steel sheet, in order to reduce the content of impurities in the product.
Due to the large fluctuations in the quality of raw materials in this method, some impurities inevitably enter the melting production process, so the rate of reduction of impurities in the product is limited, the product quality is not high, the yield is low, and the production furnace is difficult to maintain. The cost and energy consumption of products with high complexity of furnace operation are relatively high, and the economic performance is poor.
The furnace method removes calcium and aluminum better, but it produces more tail gases. Leaks often occur during the production process, chlorine-blast graphite tubes break, and refining is suspended, which seriously pollutes the environment, endangers the health of workers, and negatively affects production. The equipment is highly corroding.
For refining outside the furnace, the top oxygen blowing method is used, which is also well suited for removing impurities such as calcium, aluminum and carbon in the product. However, in the process of use, due to the strong tumbling of molten iron and large spatter loss, the temperature of molten iron drops rapidly, resulting in burning and large iron loss, and the statistical loss is 12%-20%. Graphite tubes for oxygen purging also often break and refining is suspended, resulting in low yields. The method of selecting furnace materials to produce low-aluminum and low-carbon ferrosilicon is mainly to refine and purify raw materials, such as selected reducing agents such as blue coal and gas coal coke, to achieve a reduction in
The Specification Of Ferrosilicon 72 Metal
| Product Type: Ferrosilicon 72 Steel Casting# |
| Silicon content (Si percent): approx. 72 percent |
| Iron content (Fe%): varies depending on the specific grade. |
| Aluminium content (per cent): less than or equal to 1.0% |
| Calcium content (Ca percent): less than or equal to 0.5 percent. |
| Manganese content (Mn per cent): less than or equal to 0.5% |
| Carbon content (C%): less than or equal to 0.2 percent. |
| Phosphorus content (P percent): less than or equal to 0.1% |
| Sulphur content (S per cent): less than or equal to 0.02% |
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