Side-blown submerged combustion molten pool smelting device with oxygen-enriched air and pulverized coal blowing function

Abstract

The invention discloses a side-blown submerged combustion molten pool smelting device with an oxygen-enriched air and pulverized coal blowing function. The side-blown submerged combustion molten pool smelting device comprises a smelting furnace, a pulverized coal conveying pipe, an air conveying pipe and a plurality of coal injection assemblies, wherein the pulverized coal conveying pipe is used for conveying pulverized coal; the air conveying pipe is used for conveying oxygen-enriched air; the air conveying pipe communicates with an air source; and the multiple coal injection assemblies are arranged on the two opposite side walls of the smelting furnace at intervals. Each coal injection assembly comprises a pulverized coal injection gun and an air spray gun which are arranged adjacently in a paired mode. Each pulverized coal injection gun communicates with the pulverized coal conveying pipe. Each air spray gun communicates with the air conveying pipe. Each coal injection assembly at least partially stretches into the smelting furnace. According to the side-blown submerged combustion molten pool smelting device with the oxygen-enriched air and pulverized coal blowing function, the pulverized coal can serve as fuel, and the side-blown submerged combustion molten pool smelting device has the advantages of being high in production efficiency, low in operation cost, broad in application range and the like.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a side-blowing submerged combustion bath smelting device for injecting oxygen-enriched air and pulverized coal. Background technique [0002] The side-blown submerged combustion bath smelting process (SSC process) is to inject oxygen-enriched air and gas fuel into the molten pool through the tuyeres or spray guns on both sides of the melting furnace, and the injected gas stirs the molten pool to accelerate heat and mass transfer in the molten pool And chemical reaction, widely used in lead smelting, zinc leaching slag fuming, copper smelting and other non-ferrous metals and solid waste treatment fields. [0003] The side-blown submerged smelting device in the related art uses natural gas, coke oven gas, and generated gas as fuels, but for areas lacking gas, it is impossible to economically use gas as the fuel for the side-blown submerged smelting device, which limits the appli...

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Problems solved by technology

[0003] The side-blown submerged smelting device in the related art uses natural gas, coke oven gas, and generated gas as fuels, but for areas lacking gas, it is impossible to economically use gas as the fuel for the side-blown submerged smelting device, which limits the application of the side-blown submerged combustion technology. applicability

[0004] In the smelting device in the related art, if pulverized coal is used as fuel, the pulverized coal and air are mixed inside the spray gun or tuyere. In order to ensure safety, the oxygen concentration in the air should not be too high, so that the bed energy rate and thermal efficiency cannot adapt The needs of the development of the current non-ferrous metal smelting industry, so large-scale industrial production cannot be realized

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