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Method for smelting reduction production of zinc smelting slag

A technology of zinc smelting slag and zinc smelting, which is applied in the field of smelting reduction production of zinc smelting slag, and can solve problems such as waste of resources, environmental pollution, and large pollution

Inactive Publication Date: 2018-02-16
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, zinc smelting slag is processed and recovered by volatilization kiln, fuming furnace, blast furnace, vortex smelting and other processes. Only part of the lead, zinc, silver and other components are recovered, and the recovery of valuable components such as copper, iron and gold is not considered. And high energy consumption, large pollution
[0003] At present, a large amount of zinc smelting slag is accumulated, and the zinc smelting slag contains a large amount of heavy metal ions, which not only brings serious environmental pollution, but also causes waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0223] A method for smelting reduction production of zinc smelting slag, comprising the following steps:

[0224] Step 1, slag mixing: add cold zinc smelting slag (zinc leaching slag and volatilized kiln slag) into DC electric arc furnace, and add lime and SiO 2 , MgO, Al 2 o 3 , forming a mixed slag; heating the mixed slag to a molten state to form a copper-containing reaction slag, adding copper oxide concentrate at the same time, and allowing the reaction slag to achieve natural mixing; real-time monitoring of the reaction slag, and ensuring that (a ) and (b) two parameters to obtain the slag after the completion of the reaction;

[0225] Corresponding to (a): the temperature of the copper-containing reaction slag is 1660°C, a refractory spray gun is inserted into the reaction slag, and nitrogen with a preheating temperature of 1100°C is used as the loading gas, and copper slag with a particle size of ≤150 μm at room temperature is sprayed , copper-containing soot, misce...

Embodiment 2

[0235] A method for smelting reduction production of zinc smelting slag, comprising the following steps:

[0236] Step 1, slag mixing: add cold zinc smelting slag (zinc leaching slag) into pourable smelting reaction slag tank, and add limestone, dolomite, red mud, FeO and Fe at the same time 2 o 3 , forming mixed slag, adding copper oxide concentrate and copper sulfide concentrate at the same time; using oxygen-enriched air with a preheating temperature of 800°C, blowing natural gas, anthracite and coke particles with a particle size of 20mm, and heating the mixed slag to a molten state , form copper-containing reaction slag; monitor the reaction slag in real time, and ensure the two parameters (a) and (b) at the same time through regulation, and obtain the slag after the reaction is completed;

[0237] Corresponding to (a) the temperature of the copper-containing reaction slag is 1520°C, use a refractory spray gun to insert into the reaction slag, use normal temperature argo...

Embodiment 3

[0255] A method for smelting reduction production of zinc smelting slag, comprising the following steps:

[0256] Step 1, slag mixing: Add zinc smelting slag (hot volatile kiln slag obtained from the discharge port of the volatilization kiln) into the DC electric arc furnace, and at the same time add limestone and high-calcium red mud after desodiumization to form a mixed slag, and add sulfurized slag at the same time Copper concentrate: use oxygen with a preheating temperature of 900°C, inject anthracite, coke particles and coal powder with a particle size of 20mm, heat the mixed slag to a molten state, form a copper-containing reaction slag, and mix it mechanically; monitor the reaction in real time For slag, the slag after the reaction is completed is obtained by regulating and controlling the two parameters (a) and (b) at the same time;

[0257] Corresponding to (a): The temperature of the copper-containing reaction slag is 1685°C. Add acid metallized pellets, copper smelt...

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Abstract

The invention discloses a method for smelting reduction production of zinc smelting slag. The method for smelting reduction production of the zinc smelting slag comprises the following steps that S1,the zinc smelting slag is added into an insulation device or a smelting reaction device allowing slag to flow out, calcium minerals and additives are added, all the components are heated to be in themolten state, one or more of copper oxide minerals, copper sulfide minerals and copper-containing materials are added into the insulation device or the smelting reaction device at the moment, reactionslag is monitored in real time, and molten slag is obtained by regulating and controlling the temperature and the CaO / SiO2 basicity ratio of the reaction slag; and S2, the molten slag is obtained, aferrum-containing silicate mineral phase, a copper-rich phase, a ferrum-rich phase and dust containing zinc, lead, bismuth and smoke are obtained through settlement separation, gold and silver are migrated and enriched to enter the copper-rich phase, and all the phases are separated. According to the method for smelting reduction production of the zinc smelting slag, the slag copper content (lowerthan 0.1 wt%) can be decreased, efficient recovery of components such as copper, ferrum, gold, silver, lead, zinc, indium, bismuth, sodium and potassium can be achieved, and low-copper ferrum-containing materials are obtained; and the metal recovery rate is high, the production cost is low, environmental friendliness is achieved, and economic benefits are high.

Description

technical field [0001] The invention belongs to the technical field of resource comprehensive utilization and slag metallurgy, and in particular relates to a production method of zinc smelting slag fusion reduction. Background technique [0002] The zinc smelting process includes two processes of hydrometallurgy and vertical tank zinc smelting. The two processes produce a large amount of zinc smelting slag, among which zinc leaching slag, jarosite slag, pickling jarosite slag, goethite Slag, hematite slag, etc., vertical tank zinc smelting produces vertical tank zinc smelting furnace slag. Zinc smelting slag contains secondary resources such as copper, iron, zinc, lead, indium, gold, and silver, among which the iron content is as high as 50%, far exceeding the mineable grade of iron ore (minable grade, iron content>26wt%), The copper content is as high as 2%, far exceeding the mineable grade of copper ore (minable grade, copper content>0.2wt%), and the zinc content is...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B15/00C22B19/30C22B13/00C22B11/00C22B26/10C22B58/00C22B30/06
CPCC22B7/001C22B7/04C22B11/00C22B13/00C22B15/00C22B19/30C22B26/10C22B30/06C22B58/00Y02P10/20
Inventor 张力张武
Owner NORTHEASTERN UNIV
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