What are the factors that affect the conversion rate of sponge iron metal

Production technology of sponge iron

The production of sponge iron is made by rolling iron oxide sheet, roasting at high temperature in tunnel kiln or rotary kiln, and reducing iron oxide by pulverized coal. The metal conversion rate has an important effect on the quality and production cost of the final reduced iron powder.

The reduction roasting temperature of sponge iron has a great effect on the reduction process of iron oxide. With the increase of the reduction roasting temperature, the metal conversion index gradually improves. When the temperature reaches 1050, the metal conversion rate reaches about 97.48%Therefore, the appropriate temperature rise can promote the reduction of iron oxide and the gasification of carbon, but the temperature rise is easily limited by the soft melting of ash slag in the reducing agent anthracite powder and the generation of 2FeO·SO2 and other low melting point minerals. Therefore, the temperature in the reactor should be controlled to reach the optimal temperature to shorten the reduction roasting time.

What are the measures to improve the metal conversion rate

Using high quality anthracite as reducing agent can improve the speed of reduction reaction as the raw material for the production of reduced iron powder. Using high quality anthracite as reducing agent can reduce the reduction temperature, improve the metal conversion rate, shorten the reduction time, thus reducing the production energy consumption and production cost, and obtain better economic benefits.