Sintering combustion improver for sintering mineral powder into sinter and use method thereof

Abstract

The invention relates to a sintering combustion improver for sintering mineral powder into sinter and a use method thereof. The sintering combustion improver takes serpentine powder as a carrier, and when iron accounts for 50-70 percent of the mineral powder the sintering combustion improver comprises the following components in percentage by weight: 10-25 percent of sodium chlorate, 1-20 percentof sodium nitrate, 1-10 percent of ammonium carbonate, 1-20 percent of sodium borate, 1-20 percent of cerium oxide, 1-10 percent of manganese oxide, 1-20 percent of iron oxide black, 1-10 percent of triple superphosphate powder, 1-20 percent of bentonite and 1-10 percent of sodium oxide. The use method comprises the following steps of: conveying mineral powder and sintering combustion improver accounting for 0.03 percent of the weight of the mineral powder to a primary mixer, adding water for humidification and mixing evenly, pelletizing the mixture by a secondary mixer, evenly distributing the granules on a sintering machine hearth, and carrying out sintering ignition to form the sinter. The invention can play the roles of helping to combust, accelerating the sintering speed, enhancing the production efficiency and yield efficiency and inhibiting pulverization, is environmental-friendly and energy saving, and can enhance the sintering machine utilization factor by over 5 percent and the sinter drum index by over 6 percent and reduce the ferrous content by about 2 percent.

Description

technical field [0001] The invention relates to a sintering combustion aid for sintering ore powder used for ironmaking and steelmaking into sintered ore and its application method. Background technique [0002] Before using ore powder for ironmaking and steelmaking, it is first necessary to sinter the iron ore powder, which is to mix fine-grained iron-containing materials with fine-grained fuel and fine-grained solvent in a certain proportion, add water to mix and granulate, and add to On the sintering equipment, ignition, air supply, with the help of the high temperature generated by fuel combustion and a series of physical and chemical changes, some low melting point substances are generated, and softened and melted to produce a certain amount of liquid phase, which wets and bonds the iron minerals. After cooling , that is, become a porous block product with a certain strength - sintered ore. In the current sintering process, the sintering temperature is high, and it is ...

AI Technical Summary

Problems solved by technology

In the current sintering process, the sintering temperature is high, and it is easy to generate a large amount of harmful gases, which wastes energy and does not save environmental protection.