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Crude lead refining process for lead-acid battery recovery

A crude lead refining and lead-acid battery technology, which is applied in the field of crude lead refining and crude lead refining process for lead-acid battery recycling, can solve the problems of environmental pollution, low production cost, and less loss of precious metals, and achieve less loss of precious metals and higher production efficiency. The effect of low cost and high labor productivity

Active Publication Date: 2020-11-27
太和县大华能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a crude lead refining process for lead-acid battery recovery, using (1-hydroxyethylidene) diphosphonic acid solution electrolysis system to be environmentally friendly, and will not produce volatile smoke or Acid mist overcomes the shortcoming of silicofluoric acid system electrolyte polluting the environment; adding acidic ionic liquids, additives, 7,7'-iminobis(4-hydroxy-2-naphthalenesulfonic acid) to the solution greatly improves The solubility and conductivity of the solution are improved, which provides a prerequisite for improving the direct electrolytic refining of low-purity crude lead; the synergistic effect of each component makes the current efficiency and labor productivity higher, the loss of precious metals is less, and the purity of electrolytic lead is higher. , the production cost is lower, and the direct recovery rate of lead in the refining process and the comprehensive recovery rate of various valuable metals are improved;

Method used

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Examples

Experimental program
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Embodiment 1

[0039] see Figure 1-5 As shown, the present embodiment is a crude lead refining process for recycling lead-acid batteries, and the crude lead refining process comprises the following steps:

[0040] Step S1, configuration of electrolyte:

[0041] Stir and dissolve at room temperature to obtain a mixed solution, then add lead oxide powder and additives to the mixed solution, stir and dissolve at a temperature of 80°C and a stirring speed of 800r / min for 5 hours, then filter, and the obtained filtrate is the electrolytic solution. liquid;

[0042] Step S2, preparation of electrodes:

[0043] Crude lead is subjected to pyro-refining through a refining device, and the pyro-refined crude lead and electrodeposited refined lead are respectively cast into a crude lead anode and an electrodeposited lead cathode in a molten state;

[0044] Step S3, electrolysis:

[0045] The prepared electrolyte is added to the electrolytic cell, and the rough lead anode and the electrodeposited le...

Embodiment 2

[0053] see Figure 1-5 As shown, the present embodiment is a crude lead refining process for recycling lead-acid batteries, and the crude lead refining process comprises the following steps:

[0054] Step S1, configuration of electrolyte:

[0055] Stir and dissolve at room temperature to obtain a mixed solution, then add lead oxide powder and additives to the mixed solution, stir and dissolve at a temperature of 100°C and a stirring speed of 1000r / min for 7 hours, then filter, and the resulting filtrate is electrolytic liquid;

[0056] Step S2, preparation of electrodes:

[0057] Crude lead is subjected to pyro-refining through a refining device, and the pyro-refined crude lead and electrodeposited refined lead are respectively cast into a crude lead anode and an electrodeposited lead cathode in a molten state;

[0058] Step S3, electrolysis:

[0059] The prepared electrolyte is added to the electrolytic cell, and the rough lead anode and the electrodeposited lead cathode ...

Embodiment 3

[0065] see Figure 1~5 As shown, the refining device in this embodiment includes a hoist 2, a conveying auger 8, a mixing drum 9 and a melting furnace 11. A placement rack 12 is placed on the lower side of the hoist 2, and one side of the placement rack 12 is placed There is a base 13, a mixing cylinder 9 is installed on the upper side of the base 13, a melting furnace 11 is installed on one side of the mixing cylinder 9, and an air outlet 10 is provided on the upper side of the melting furnace 11;

[0066] Wherein, the second support legs 3 are symmetrically installed on both sides of the hoist 2, the conveyor chain plate 4 is installed on the hoist 2, the material blocking plate 5 is installed on the conveyor chain plate 4, and the hoist 2 The first supporting leg 1 is installed on both sides of the side and close to the position of the placement frame 12, the upper side of the placement frame 12 is equipped with a conveying auger 8, and the upper side of the conveying auger...

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Abstract

The invention discloses a crude lead refining process for lead-acid battery recovery. The crude lead refining process comprises the following steps: stirring and dissolving at normal temperature to prepare a mixed solution, adding lead oxide powder and an additive into the mixed solution, stirring and dissolving at the temperature of 80-100 DEG C and the stirring speed of 800-1000r / min for 5-7 hours, and filtering to obtain an electrolyte; carrying out fire refining on crude lead through a refining device, and respectively casting the crude lead subjected to fire refining and electrodepositedrefined lead in a molten state into a crude lead anode and an electrodeposited lead cathode; and adding the prepared electrolyte into an electrolytic cell, introducing direct current for electrolysis,melting and casting the electrolytic lead obtained by cathode electrodeposition to obtain a pure lead ingot, washing and filter-pressing anode mud, and then sending the anode mud to a noble metal extraction process for treatment. The crude lead refining process disclosed by the invention improves the direct recovery rate of lead in the refining process and the comprehensive recovery rate of various valuable metals, and the electrolytic lead is higher in purity and lower in production cost.

Description

technical field [0001] The invention belongs to the technical field of lead-acid battery production, and relates to a crude lead refining technology, in particular to a crude lead refining process for recycling lead-acid batteries. Background technique [0002] A lead-acid battery is a battery whose electrodes are mainly made of lead and its oxides, and the electrolyte is a sulfuric acid solution. In the discharge state of the lead-acid battery, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead; in the charging state, the main component of the positive and negative electrodes is lead sulfate. The nominal voltage of a single-cell lead-acid battery is 2.0V, which can be discharged to 1.5V and charged to 2.4V; in applications, six single-cell lead-acid batteries are often connected in series to form a nominal 12V lead-acid battery , There are 24V, 36V, 48V and so on. [0003] At present, the method widely us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/18H01M10/54
CPCC25C1/18H01M10/54Y02W30/84
Inventor 杜文明陈新军朱成龙代辉游弘宇
Owner 太和县大华能源科技有限公司
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