The difference between silicon metal 441 and silicon metal 553

Silicon metal , also known as crystalline silicon or industrial silicon, is mainly used as an additive for non-ferrous alloys. Silicon metal is a product smelted by quartz and coke in an electric heating furnace. The content of the main component silicon is about 98% (in recent years, the silicon content of 99.99% is also included in silicon metal), and the remaining impurities are iron and aluminum. , calcium, etc.

Classification of silicon metal grades

In my country, silicon metal is usually classified according to the content of three main impurities, iron, aluminum and calcium. According to the percentage content of iron, aluminum and calcium in metal silicon, silicon metal can be divided into 553, 441, 411, 421, 3303, 3305, 2202, 2502, 1501, 1101 and other different grades. (About the source of the metal silicon number: the first and second codes are the percentage content of iron and aluminum, and the third and fourth two digits represent the content of calcium).

For example: 553 represents that the content of iron, aluminum, and calcium is 5%, 5%, and 3%; 3303 represents that the content of iron, aluminum, and calcium is 3%, 3%, and 0.3%.