Salinization treatment process for smoke dust of flash furnace and device thereof

Abstract

The invention relates to the metallurgical field of a flash furnace, and provides a salinization treatment process for the smoke dust of the flash furnace and a device thereof. The device comprises abase, a spray gun, a mixed oxygen pipeline, a normoxic pipeline and a pure oxygen pipeline, wherein one end of the spray gun is inserted and fixed on the base, and the middle part thereof is providedwith a nozzle; the included angle between the nozzle and the central axis of a furnace body is 30-90 degrees; an air inlet of the spray gun is communicated with the mixed oxygen pipeline which is respectively communicated with the normoxic pipeline and the pure oxygen pipeline, and the normoxic pipeline and the pure oxygen pipeline are respectively provided with a pressure gage, an automatic shut-off valve, an automatic regulating value and a flow meter. By spraying pure oxygen or oxygen-enriched air into a high temperature area, sulfide in the smoke dust can be oxidized, and more smoke dust can be settled, so that the occurring rate of the smoke dust is further reduced, and oxygen required by salinization enters into a boiler through an uptake flue along with flue gas and begins to salinize contaminating metal at the medium-high temperature stage of the boiler, thus preventing the tube wall of the boiler with waste heat from being stuck with bonding substance which is not easily cleaned and avoiding the flue being corroded.

Description

technical field [0001] The invention relates to the field of flash furnace metallurgy, in particular to a salinization treatment process and device for flash furnace dust. Background technique [0002] In the metallurgical industry, especially in the flash furnace copper smelting process, the requirements for materials are very high. The particle size of the copper concentrate fed into the flash smelting furnace is 70% ≤ 200 mesh, and the matte powder fed into the flash blowing furnace is 70% ≤ 325 mesh, water content ≤ 0.3%, and the oxidation reaction is in a suspended state and completed in an instant. After the oxidation reaction is completed, the small droplets must collide with each other to form larger droplets and then settle in the sedimentation tank. Unsettled small droplets and under-oxidized small particles are mixed in the flue gas to form soot, and the soot rate is very high, generally around 7.5%. When dealing with high-impurity materials, the soot content in t...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to solve the problem that the tube wall of the waste heat boiler is hard to be removed and the corrosion of the flue is aggravated.

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