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Assembled gelatin additive

An additive and colloidal technology, applied in photography technology, instruments, photography auxiliary technology and other directions, can solve the problems of hindering metal precipitation, increasing cathodic polarization, no quantitative experiments, etc. Effect

Inactive Publication Date: 2007-01-17
YUNNAN METALLURGICAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, gelatin as an additive also has its obvious disadvantages: gelatin is a kind of colloid, which forms a thin film on the surface of the electrode by adhesive force, hinders the precipitation of metal, increases the resistance of the electrolytic solution, increases the polarization of the cathode, and directly leads to increased energy consumption
There are few systematic and specific studies on additives in China, and there are few relevant literatures and no quantitative experiments. No new additives in the zinc electrowinning process have been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The industrial electrowinning solution adopts the top-in and bottom-out electrowinning method, the distance between the plates is 6mm, the electrowinning deposition period is 24 hours, and the current density is 500A / m 2 , the cathode plate used is a calendered pure aluminum plate, the anode plate is a lead plate containing 1% silver, and the current efficiency is 88% in the electrowinning process by adding gelatin additives, and the yield of 0# zinc obtained is 90%, and there is a burning plate phenomenon, The direct recovery rate is 97%, and the power consumption is 3011kw.h / t.

[0012] Under the same conditions, gelatin 50%, thiourea 20% are evenly mixed and then 27% cresol is added, 3% gum is added to the mixture, and the combined colloid additive is added every 12 hours, and no burnt board phenomenon occurs. The current efficiency is 90.5%, the 0# zinc production rate is 97%, the direct recovery rate is 98.1%, and the electric energy consumption is 2844kw.h / t.

Embodiment 2

[0014] The industrial electrowinning solution adopts the top-in and bottom-out electrowinning method, the distance between the plates is 7mm, the electrowinning deposition cycle is 48 hours, and the current density is 550A / m 2 , the cathode plate used is a rolled pure aluminum plate, the anode plate is a lead plate containing 1% silver, and the current efficiency is 88% in the electrowinning process by adding gelatin additive, and the 0# zinc yield rate that draws is 90%, and the direct yield rate is 97%, the power consumption is 3041kw.h / t.

[0015] Under the same conditions, 30% of gelatin and 30% of thiourea are uniformly mixed, then 37% of cresol is added, 3% gum is added to the mixture, and the combined gum additive is added every 12 hours, and the current efficiency is 90%. The yield of 0# zinc is 97%, the direct yield is 98.2%, and the electric energy consumption is 2865kw.h / t.

Embodiment 3

[0017] The industrial electrowinning solution adopts the top-in and bottom-out electrowinning method, the distance between the plates is 5mm, the electrowinning deposition cycle is 36 hours, and the current density is 540A / m 2 , the cathode plate used is a calendered pure aluminum plate, the anode plate is a lead plate containing 1% silver, the current efficiency is 89% in the electrowinning process by adding gelatin additive, and the 0# zinc yield rate obtained is 92%, and there is a burning plate phenomenon, The direct recovery rate is 97%, and the power consumption is 3101kw.h / t.

[0018] Under the same conditions, 30% gelatin and 40% thiourea were evenly mixed, and 25% cresol was added, 5% gum was added to the mixture, and the combined gum additive was added every 12 hours. The current efficiency is 91%, the yield of 0# zinc is 97%, the direct yield is 98.5%, and the power consumption is 2856kw.h / t.

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Abstract

The present invention is a new additive applied in the zinc metallurgy field. 30%-50% of glutin and 20%-40% of thiourea are mixed in the mass ratio, 20%-40% of cresol is added into the mixture and 3%-5% of balata is then added to the diluted mixture. In the long term of electrodeposition, the addition of the composite gluey additive to the electrodeposition tank will enhance current efficiency, reduce the energy consumption, promote the quality of the electrode plate, increase the recovery efficiency in the fusion casting process, decrease the cost of the zinc electrodeposition and depress the dissolution effectively.

Description

technical field [0001] The invention is a novel additive used in the field of metallurgy, more specifically, it belongs to a special composite additive in the field of zinc smelting. Background technique [0002] The development of modern industry has strict requirements on metal quality. To obtain high-quality zinc, various technical conditions must be strictly controlled. Adding appropriate additives is an effective measure to obtain high-quality zinc with dense structure and low impurity content. Zinc electrowinning is the last process of zinc hydrosmelting, which largely affects the cost of the entire zinc hydrosmelting. [0003] At present, domestic smelters generally use gelatin as an additive in the zinc electrowinning process. Gelatin is a surface active substance with a positive charge in an acidic solution. Point to prevent the growth of crystal nuclei, make the surface of precipitated zinc smooth, and reduce the harmful effects of impurities such as antimony and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/16
CPCY02P10/20
Inventor 王吉坤李永佳杨大锦阎江峰陈加希
Owner YUNNAN METALLURGICAL GROUP
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