Method for producing electrolytic lead powder through alkali immersion rotational flow electrolysis of wet electrolytic zinc acid dipping residues

A technology for electrolysis of zinc acid leaching residue and cyclone electrolysis, applied in the field of smelting, can solve the problems of low recovery rate, poor operating conditions, and high energy consumption of zinc leaching residue, and achieve high leaching rate, low labor intensity and high market value. Effect

Active Publication Date: 2013-01-02
江西自立环保科技有限公司
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Problems solved by technology

Pyrochemical treatment of zinc leaching slag has disadvantages such as high energy consumption, poor operating conditions, and low recovery rate.

Method used

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Examples

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Embodiment 1

[0033] Example 1: See Table 1 for the chemical composition of acid leaching slag produced in a typical wet electrolytic zinc production.

[0034] Table 1 Chemical composition of acid leaching residue produced in wet electrolytic zinc production / %

[0035] Zn Cu Pb sn Fe Ni As Sb 4.7 0.23 30.5 14.1 0.23 0.06 1.96 0.77

[0036] ① Leaching

[0037] According to the liquid-solid mass ratio of the sodium hydroxide aqueous solution leaching agent and the acid leaching residue produced in the wet electrolytic zinc production of 5:1, the free alkali in the leaching agent is 150~250 g / L, and the reaction is carried out at a temperature of 100 °C for 4 h. The free alkali at the end of the leaching reaction is 150 g / L, and after liquid-solid separation, a clarified leachate and tin-containing leach residue are obtained;

[0038] ② purification

[0039] In the clarified leaching solution described in ①, add lead powder of 6 times the amount of ...

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Abstract

The invention discloses a method for recovering lead powder through alkali immersion rotational flow electrolysis of wet electrolytic zinc acid dipping residues. The method is characterized in that acid dipping residues generated in the wet electrolytic zinc production are adopted as a raw material and are leached through a sodium hydroxide solution; metal ions with the reduction potential higher than lead are removed to purify the resultant leachate; and ultrafine electrolytic lead powder is produced through the electrodeposition of a rotational flow electrolytic device. The method which adopts the sodium hydroxide as an acid dipping residue leaching agent has the advantages of high lead leaching rate, no tin leaching, and realization of lead and tin separation; the method which adopts the rotational flow electrolysis to prepare the ultrafine lead powder has the advantages of high purity, large market value, high lead removal rate, and low labor intensity; and no wastewater discharge and environmental protection are realized in the whole production process.

Description

technical field [0001] The invention belongs to the technical field of smelting, and relates to a method for recovering and producing electrolytic lead powder from acid leaching slag, in particular to a method for recovering lead powder from wet electrolytic zinc acid leaching slag by alkali leaching swirl electrolysis. Background technique [0002] The acid leaching slag produced in the production of wet electrolytic zinc contains a large amount of valuable metals lead and tin, and it is necessary to separate and recycle the lead and tin. [0003] The prior art CN101209496 provides a method for preparing superfine lead powder from lead fume or slag. The method comprises the following steps: leaching lead fume or slag with sulfuric acid and concentrated sodium chloride solution, separating solid and liquid to obtain a lead-containing solution, cooling and crystallizing to obtain lead chloride crystals; making the obtained lead chloride crystals into electrolyte, and making ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C25C5/02
CPCY02P10/20
Inventor 叶标宁建平施文山
Owner 江西自立环保科技有限公司
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