In the smelting process of brown corundum, the quality and source of raw materials are very important and also a production process under strict control. Whether the quality of raw materials can be effectively controlled not only affects the product quality and use, but also affects the manufacturing cost of brown corundum production.

1. Main raw materials for smelting brown corundum

The main raw materials for the production of brown corundum are bauxite, iron filings and anthracite, all of which have certain quality indicators.

2. Indexes of raw bauxite

The bauxite clinker for smelting brown corundum is different from that for producing metal aluminum. The bauxite clinker used for smelting brown corundum is bauxite with high AL2O3, TiO2, low SiO2 and CaO, but the relative index of bauxite used for producing metal aluminum is not so high. Our company strictly controls the quality of raw ore, uses high-quality bauxite containing more than 75% aluminum as raw materials, and after dehydration and sintering, ensures the quality stability of the final corundum products.

3. Design of smelting process of brown corundum

Smelting is an important process in the production of brown corundum. By properly controlling the smelting atmosphere, bauxite, reducing agent and clarifying agent can be oxidized and reduced under high temperature to remove impurities, so as to obtain corundum meeting the quality requirements.

The furnace charge shall be designed in a targeted way to reasonably control the charging materials. In order to achieve good smelting index by optimizing the charging design, it is necessary to reasonably allocate the PH value in the furnace.

The batch preparation system of furnace charge shall be designed according to the capacity of smelting equipment. The reasonable optimization process design to solve the burden difference is to divide the smelting burden into the early, middle and late stages, which is very beneficial to the economic effect.

4. Smelting process of brown corundum

Raw bauxite calcination → raw bauxite (anthracite, scrap iron) warehousing inspection and control → material preparation (hierarchical control → pellet preparation → drying treatment) → batching → smelting → dumping → cooling → crushing → metering and warehousing.