Both are similar in raw material selection and basic smelting principles. Both are smelted in a submerged arc furnace with silica and carbonaceous reducing agents as the main raw materials. However, there are differences in the refining process due to different requirements for impurity content. Silicon Metal 421 has stricter requirements on aluminum content, and more precise control of impurity removal process is required during the refining process to ensure that the aluminum content meets the standard.
In general, the price of Silicon Metal 421 is higher than that of Silicon Metal 441. This is because Silicon Metal 421 has stricter requirements on impurity content, especially aluminum content, and is more difficult to produce. It is widely used in high-end fields such as organic silicon and polysilicon, and the market demand characteristics and product added value are also different from those of Silicon Metal 441.
Differences between Silicon Metal 441 and Silicon Metal 421
| Product |
Silicon Metal 441
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Silicon Metal 421
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| Chemical composition | Silicon Metal 441: Iron content ≤0.4%, aluminum content ≤0.4%, calcium content ≤0.1%, silicon content is usually ≥99.1%. | Metal silicon 421: iron content ≤ 0.4%, aluminum content ≤ 0.2%, calcium content ≤ 0.1%, silicon content is usually ≥ 99.3%. |
| Application field | mainly used in metallurgical grade, it can improve its hardness, strength and other properties in aluminum alloy manufacturing, and is widely used in the manufacture of aluminum alloy parts in the fields of automobiles, aerospace, etc.; in the steel industry, as a deoxidizer and alloying element, it can effectively remove oxygen from molten steel and improve the quality of steel. | more used in chemical grade, it is an important raw material for the production of silicone and polysilicon. In the production of silicone, it can provide high-quality silicon source for synthetic silicone rubber, silicone oil, silicone resin and other products; when used in the production of polysilicon, it can further manufacture solar cells and semiconductor components. |
| Market demand | its demand is closely related to the development of aluminum alloy and steel industries. The development of industries such as construction, automobile manufacturing, and mechanical processing will directly drive changes in its demand. | Market demand is greatly affected by the electronic information industry and the silicone chemical industry. With the rapid development of emerging industries such as new energy, 5G communications, and semiconductors, the demand for Metal Silicon 421 is on the rise. |
