Efficient preheating and pre-reduction device used for iron ore powder production and preparation

Abstract

The invention discloses an efficient preheating and pre-reduction device used for iron ore powder production and preparation. The efficient preheating and pre-reduction device comprises a bottom plate, wherein the bottom of the bottom plate is fixedly connected with supporting columns; the upper surface of the bottom plate is fixedly connected with a kettle body; the upper surface of the kettle body is fixedly connected with a feeding funnel; the inner wall of the kettle body is fixedly connected with a supporting plate; and the upper surface of the supporting plate is provided with conical holes. According to the efficient preheating and pre-reduction device used for the iron ore powder production and preparation, through the feeding hopper, the supporting plate and the conical holes, materials can conveniently intensively flow into a grinding disc and a filtering plate, then, an electric motor is started to drive a transmission rod and the grinding disc to rotate to grind irregular broken stone on the surface of the filtering plate, so that iron ore powders which fall to a filtering net from the surface of the filtering plate can be subjected to secondary filtering, unqualified iron ore powders are conveyed to the feeding hopper on the surface of the kettle body through a first elevator and are processed in the kettle body again, and therefore, the iron ore powder productionand preparation has a returned material processing effect.

Description

technical field [0001] The invention relates to the technical field of iron ore powder production, in particular to an efficient preheating and prereduction device for iron ore powder production and preparation. Background technique [0002] At present, in the smelting reduction ironmaking process, the preheating methods of iron ore powder that have been industrialized are mainly fluidized bed preheating and pre-reduction and rotary kiln preheating and pre-reduction. Through the preheating and pre-reduction of iron ore powder, the final The reaction furnace will greatly increase the reaction rate and thermal efficiency, which is the most effective way to increase production and efficiency and reduce the load on the final reactor. [0003] Fluidized bed preheating and prereduction technology is used in the first generation ironmaking process, which adopts the fluidized bed technology combined with circulating fluidized bed and annular fluidized bed, which can preheat ore powd...

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Problems solved by technology

[0003] Fluidized bed preheating and prereduction technology is used in the first generation ironmaking process, which adopts the fluidized bed technology combined with circulating fluidized bed and annular fluidized bed, which can preheat ore powder to above 700°C, and the reaction gas is The high-temperature coal gas of the melting furnace with a temperature of 1000 ℃, and the use of suspension preheating technology to process ultra-fine iron ore powder, due to the large density of iron ore powder, the decline in the separation efficiency of the cyclone, and the difference in the powder gas-solid mass transfer and heat transfer process, there are great differences, and This technology has not been used in the smelting reduction ironmaking process, and the connection with other systems of the process and the consistency of material flow, energy flow, and information flow will all have major changes. When the reduction device is in use, when the material is added with new materials and ingredients, the material will directly enter the next link during the grinding process, which will affect the efficient preheating and pre-reduction of iron ore powder, and it will not be used later.

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