Method for improving electrical conductivity performance of lead electrolyte

A lead electrolyte and conductivity technology, applied in the metallurgical field, can solve the problems of high power consumption of the inert anode electrowinning method, aggravate equipment corrosion, and be unfavorable to the direct yield of lead refining, and achieve convenient operation, reduce cell voltage, environmental friendly effect

Active Publication Date: 2019-09-10
YUNNAN HONGCHI RESOURCE INTEGRATION UTILIZATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Sulfuric acid deleading + sodium chloride precipitation method is easy to introduce chloride ions into the electrolyte, aggravating the corrosion of equipment, and after sulfuric acid de

Method used

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  • Method for improving electrical conductivity performance of lead electrolyte

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Effect test

Embodiment 1

[0025] In this embodiment, the lead electrolyte (120.2g / L of lead ion, 75.6g / L of free fluorosilicic acid, 38.7g / L of aminoacetic acid, 38.7g / L of aminoacetic acid, which has been recycled for more than 2 years is used to measure the conductivity at 25°C as the reference temperature. 141mS / cm) as an example.

[0026] 1) Put 20m at room temperature 3 Lead electrolyte that has been recycled for more than 2 years, 5m 3 Fluorosilicic acid aqueous solution (free silicofluoric acid content is 18.1%) and 200kg industrial-grade yellow dandelion powder (PbO content 99%) are added to a stainless steel mixing tank and mixed in turn, and mechanically stirred for 3 hours to fully react to ensure that fluorosilicic acid and yellow dandelion Full response. Afterwards, the mixed solution is pumped into the filter press for pressure filtration while stirring, and the filtrate is recovered to the liquid storage tank for clarification for 12 hours and can be used as a newly prepared lead elect...

Embodiment 2

[0034] In this embodiment, the lead electrolyte (containing lead ion 135.2g / L, free silicofluoric acid 69.9g / L, aminoacetic acid 39.5g / L) which has been recycled for more than 2 years is used to measure the conductivity at 25°C as the reference temperature. 137mS / cm) as an example.

[0035] 1) Put 18m at room temperature 3 Lead electrolyte that has been recycled for more than 2 years, 6m 3 Fluorosilicic acid aqueous solution (free silicofluoric acid content is 18.1%) and 200kg industrial grade yellow lead powder (PbO content 99%) are added to the stainless steel mixing tank and mixed in turn, and mechanically stirred for 2.5h to fully react to ensure that the fluorosilicic acid and yellow Dan responded well. Afterwards, the mixed solution is pumped into the filter press for pressure filtration while stirring, and the filtrate is recovered to the liquid storage tank for clarification for 12 hours and can be used as a newly prepared lead electrolyte, and the filter residue is ...

Embodiment 3

[0043] In this embodiment, the lead electrolyte (144.7g / L of lead ion, 70.8g / L of free fluorosilicic acid, and 41.8g / L of aminoacetic acid) that has been recycled for more than 2 years is used to measure the conductivity at 25°C as the reference temperature. 134mS / cm) as an example.

[0044] 1) Put 17m at room temperature 3 Lead electrolyte that has been recycled for more than 2 years, 7m 3 Fluorosilicic acid aqueous solution (free silicofluoric acid content is 18.1%) and 250kg industrial grade yellow dan powder (PbO content 99%) are added to the stainless steel mixing tank and mixed in turn, and mechanically stirred for 3 hours to fully react to ensure that fluorosilicic acid and yellow dan Full response. Afterwards, the mixture is pumped into the filter press for pressure filtration while stirring, and the filtrate is recovered to the liquid storage tank for clarification 10h Finally, it can be used as a newly prepared lead electrolyte, and the filter residue is recovered...

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Abstract

The invention relates to a method for improving the electrical conductivity performance of lead electrolyte and belongs to the technical field of metallurgy. The method specifically comprises the following steps of (1) rationally mixing a fluosilicic acid aqueous solution, industrial-grade yellow lead powder and the lead electrolyte with the poor electrical conductivity, filtering and clarifying the mixed solution and pumping the mixed solution into a lead electrolytic system; (2) spacing anode plates and cathode plates through an automatic spacing machine and mounting the anode plates and thecathode plates into an electrolytic cell; and (3) placing a filter device containing a compound electrolyte cleaning agent in a low tank in an electrolyte circulating system; regulating and controlling the circulating flow of electrolyte and the cell temperature in the electrolytic process, adding an appropriate amount of electrolytic additive every day, and taking cathode plates and anode scrapsafter electrolyzing for 7 days to complete an electrolytic cycle; and replacing the compound electrolyte cleaning agent once every two electrolytic cycles. The method is suitable for the lead electrolytic production process. The electrical conductivity of the electrolyte can be effectively improved. The cell voltage is reduced. The yield of electrolytic lead sheets is increased. The method has the advantages of being simple in process, convenient to operate, high in adaptability, friendly to environment and the like.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for improving the electrical conductivity of lead electrolyte. Background technique [0002] At present, the lead electrolyte used by lead electrolysis production enterprises is recycled. Due to the influence of raw material composition fluctuations of crude lead, the use of additives and the control conditions of the electrolysis process, the concentration of lead ions in the lead electrolyte will fluctuate and other impurities will continue to be enriched during the long-term recycling process. If the concentration of organic matter in the electrolyte will continue to rise, it will easily lead to a decrease in the conductivity of the lead electrolyte (reduced conductivity measurement value), an increase in the voltage drop of the electrolyte, and an increase in the electrolytic DC power consumption. [0003] The existing purification treatment methods o...

Claims

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Application Information

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IPC IPC(8): C25C1/18C25C7/06
CPCC25C1/18C25C7/06Y02P10/20
Inventor 刘克洋张梅董铁广罗恒薛灿李建伟黎学坤杨新昌徐建源翟琳娜
Owner YUNNAN HONGCHI RESOURCE INTEGRATION UTILIZATION CO LTD
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