Method for producing high-purity lead

A production method and high-purity technology, applied in the field of lead smelting, can solve the problems of increasing process links and production costs, lack of feasibility of cost, and hindering the recycling of lead, so as to expand the source of raw materials and completely reproduce the metal properties of recycled lead , Improve the effect of recycling rate

Inactive Publication Date: 2011-09-07
NINGXIA TIANMA METAL LURGITCAL CHEM GROUP STOCK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of this process is that it is necessary to add refined antimony to facilitate the adsorption and collection of anode slime, which increases the process links and production costs
The problem with this process is: there is an antimony removal process link, which increases the production cost; it is economically reasonable to use this process to produce refined lead from waste lead-acid batteries, and if it is made into high-purity lead, it needs to use a wet electrolysis process. However, secondary lead does not contain gold, silver and other associated metals, and it is not feasible from the perspective of cost. Therefore, in actual production, waste lead-acid batteries cannot be used as a source of raw materials for the production of high-purity lead, and only refined lead can be produced. Therefore, traditional processes hinder recycling of lead

Method used

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  • Method for producing high-purity lead
  • Method for producing high-purity lead
  • Method for producing high-purity lead

Examples

Experimental program
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Effect test

Embodiment 1

[0015] (1) According to the known sintering machine-blast furnace reduction smelting method, feed lead sulfide concentrate, quartz sand, and limestone into the sintering machine, and sinter at a furnace temperature of 1100°C for about 4 hours to oxidize lead sulfide into lead oxide This removes the sulfur and sinters the lead oxide into blocks. Send the obtained lead oxide block, coke and limestone into the blast furnace, and blow air into the bottom of the furnace to raise the furnace temperature to 1100°C for reduction smelting. During the reduction smelting process, lead oxide is reduced to lead, iron oxide and other impurities in the charge form slag, and the crude lead melt and slag are separated due to the difference in specific gravity when they flow into the hearth, and impurities such as zinc, silicon, and iron are removed. The resulting crude lead melt is cast to make primary crude lead blocks.

[0016] (2) According to known method, disassemble the waste lead-acid ...

Embodiment 2

[0020] (1) According to the known oxygen-enriched bottom-blown oxidation-blast furnace reduction smelting method, the lead sulfide concentrate, quartz sand, and limestone are mixed and sent into a sealed melting furnace. The furnace temperature is 1200 ° C, and industrial oxygen is blown into the furnace bottom and Use micro-negative pressure operation to get high lead slag and crude lead. The obtained high-lead slag, coke and limestone are sent into the blast furnace, the furnace temperature rises to 1200°C, and oxygen is blown into the bottom of the furnace for reduction smelting. During this process, high-lead slag is reduced to crude lead, iron oxide and other impurities in the charge form slag, and the crude lead melt and slag are separated due to the difference in specific gravity when flowing into the hearth, and impurities such as zinc, silicon, and iron are removed . The resulting crude lead melt is cast to make primary crude lead blocks.

[0021] (2) dismantling an...

Embodiment 3

[0025] (1) According to the known sintering machine-blast furnace reduction smelting method, feed lead sulfide concentrate, quartz sand, and limestone into the sintering machine, and sinter at a furnace temperature of 1300°C for about 6 hours to oxidize lead sulfide into oxidized Lead thus removes the sulfur and sinters the lead oxide into a block. Send the obtained lead oxide block, coke and limestone into the blast furnace, blow air into the bottom of the furnace, and raise the furnace temperature to 1300°C for reduction smelting. During the reduction smelting process, lead oxide is reduced to lead, iron oxide and other impurities in the charge form slag, and the crude lead melt and slag are separated due to the difference in specific gravity when they flow into the hearth, and impurities such as zinc, silicon, and iron are removed. The resulting crude lead melt is cast to make primary crude lead blocks.

[0026] (2) dismantling and recovering the waste lead-acid battery, s...

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Abstract

The invention discloses a method for producing the high purity lead, comprising the following steps that: (1) the lead sulphide is desulphurized and is reduced and smelted to obtain the native wet lead block; (2) the waste lead-acid storage battery is disassembled to obtain the waste storage battery diachylum which is smelted to a regenerated wet lead block; (3) the native wet lead block and the regenerated wet lead block are mixed with certain ratio and then are sent to a smelting furnace hearth to be smelted, the wet lead fused mass is obtained after the decoppering; (4) the wet lead fused mass is casted into an anode plate to be electrolyzed by the wet method to obtain the high purity lead. The method has simple technique flow and low production cost, enlarges the source of raw materials for producing the high purity lead and provides a new technique method for the recycling and utilization of the lead-acid storage battery to regenerate lead.

Description

technical field [0001] The invention relates to a lead smelting method, in particular to a production method of high-purity lead. Background technique [0002] At present, the main raw material for producing high-purity lead is lead sulfide concentrate. The general composition of lead sulfide concentrate is: 40-75% lead, 1-10% zinc, 16-20% sulfur, and often contains silver, copper, iron, arsenic , antimony and other associated or symbiotic metals. The lead purity of high-purity lead is 99.994%-99.999%. Such as figure 1 As shown, the traditional process of producing high-purity lead from lead sulfide concentrate is: firstly pyro-smelting lead sulfide concentrate, removing sulfur, slag, etc., to obtain rough lead block, then removing copper, adding refined antimony, and casting Anode plate, wet electrolytic production of high-purity lead. The wet electrolysis process requires that the antimony content of the anode plate is between 0.35% and 0.8%, and the copper content is ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C22B21/02C22B21/06C25C3/34
CPCY02P10/20
Inventor马生军
OwnerNINGXIA TIANMA METAL LURGITCAL CHEM GROUP STOCK