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Copper slag dilution-side top combined blowing reduction integrated furnace

A lean and side-top technology, applied to furnaces, furnace components, waste heat treatment, etc., can solve the problems of long treatment process and low heat utilization rate, reduce reduction energy consumption, reduce equipment investment, and strengthen high-efficiency dispersion distribution Effect

Pending Publication Date: 2021-07-27
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above patents can also realize the depletion or reduction process of copper slag, the treatment process is long and the heat utilization rate is low

Method used

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  • Copper slag dilution-side top combined blowing reduction integrated furnace

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Using the above copper slag, in which FeS 2 The amount added is 8% of the copper slag mass. The constant temperature depletion time is 35min, wherein the rotational speed of the mechanical stirring paddle 4 in the depletion zone is controlled at 110rpm; an excessive 50% of coke and calcium oxide are added in the reduction zone, the stirring speed in the reduction zone is 100rpm, the reduction time is 45min, and the copper content obtained by the reduction is 0.86% of molten iron.

Embodiment 2

[0048] Using the above copper slag, in which FeS 2 The amount added is 8% of the copper slag mass. The constant temperature depletion time is 35min, and the speed of the mechanical stirrer in the depletion zone is controlled at 90rpm; an excess of 40% of coke and calcium oxide is added to the reduction zone, the stirring speed in the reduction zone is 90rpm, and the reduction time is 30min. molten iron.

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Abstract

The invention relates to the field of comprehensive utilization of copper slag, in particular to a copper slag dilution-side top combined blowing reduction integrated furnace. The copper slag dilution-side top combined blowing reduction integrated furnace is integrated equipment formed by connecting a dilution system and a reduction system in series, and a furnace body is a horizontal furnace body and comprises a furnace body dilution area and a furnace body reduction area. A dilution agent is added to a dilution area of the furnace body through a dilution agent feeding port, dilution reaction is completed under the action of vortex stirring, oxygen-enriched fuel is blown into the furnace body through a fuel spray gun in the reaction process, and heat released by combustion of the oxygen-enriched fuel provides heat for melt to maintain the reaction temperature; and after diluted slag enters the reduction area, a slag former is added from a slag former feeding port, the oxygen-enriched fuel is blown through a top-blowing spray gun, and a reducing agent is carried by oxygen-enriched air and sprayed through a side spray gun. The invention provides the copper slag dilution-side top combined blowing reduction integrated furnace, which can realize efficient recovery of valuable components of copper and iron in copper slag and high-valued slag-free 100% utilization of the copper slag, and also realizes synergistic utilization of waste heat of the copper slag.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of copper slag, in particular to an integrated copper slag depletion-side top composite blowing and reduction furnace. [0002] technical background [0003] Copper smelting is an important by-product in the process of copper pyrometallurgy, which contains a considerable amount of valuable metal resources such as Cu, Fe, and Ni. Modern oxygen-enriched blowing not only strengthens the intensity of copper smelting, but also brings about a sharp increase in copper residue in smelting slag. Therefore, modern copper smelting processes have carried out depletion and recovery of copper on copper slag. There are two industrial methods for copper slag depletion and recovery of copper: slow cooling beneficiation and pyrometallurgical depletion smelting. But current copper recovery rates fall well short of industrial demand. In principle, the beneficiation method can only recover most of the matte i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B9/10C22B15/00F27D17/00
CPCC22B7/04C22B7/001C22B9/103C22B15/0054C22B15/0052F27D17/004
Inventor 张廷安豆志河吕国志郭军华刘燕张子木赫冀成
Owner NORTHEASTERN UNIV
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