How to improve the purity of silicon carbide?

Impurity silicon carbide powder will affect the use of silicon carbide range, reduce the price and quality of silicon carbide. Silicon carbide ultrafine powder has high melting point and hardness, relatively stable chemical and physical properties. High purity ultra-fine silicon carbide powder is widely used in modernization, industrialization and other fields, but silicon carbide in smelting or processing is easier to introduce impurities, iron trioxide is one of the iron elements.

The advantage of the chemical method of removing iron in the ultrafine silicon carbide powder is relatively clean, but the silicon carbide treated by chemical method is easy to caking, and the method is more complex. Silicon carbide ultrafine powder in iron removal physical method, the main use of mechanical physical iron removal method, need to use magnetic separator equipment, using the principle of magnet to collect iron impurities in silicon carbide ultrafine powder, magnetic separator equipment has different specifications, collection effect is different, the use of magnetic separator method is more convenient and fast, only need to buy equipment can, But the use of magnetic separator in addition to iron removal effect is limited, can only improve the purity of silicon carbide, so that the use of standards qualified, and can not completely remove iron, the need for higher purity silicon carbide powder products, can be repeated several times magnetic separation or the use of chemical methods to remove iron, hope to increase the purity of silicon carbide to reduce iron carbide can use physical magnetic separation equipment.