The main raw materials for smelting brown corundum are bauxite, carbon materials and iron filings. Many people do not understand why iron filings should be added to smelting brown corundum. After all, the content of iron oxide in smelting process does have a great impact on the quality of brown corundum. Nevertheless, scrap iron is still essential in the actual production process.

When smelting brown corundum, the main function of iron filings is to form clarificant or diluent, and the diluted object is mainly ferroalloy, that is, to accelerate the reaction in the furnace to increase the proportion of ferroalloy, so that it can sink in the furnace bottom to separate from the corundum solution. It has laid a foundation for future magnetic separation. After all, the magnetism of ferroalloy has been greatly improved after reaction!

In the smelting process, the requirements for iron filings should be considered from many aspects, mainly affected by the composition of bauxite.

One is iron oxide, because the iron filings generated after the reaction of iron oxide are iron filings that can be added to a certain extent. In this case, the amount of iron filings added needs to be controlled; The other is silicon dioxide. If it is the excessive content of silicon oxide in bauxite, the magnetic properties of ferroalloy will be greatly weakened, which is very unfavorable for the subsequent magnetic separation. In this case, it is necessary to control the ratio of iron to silicon to avoid this situation.