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A method for recovering zinc metal by utilizing regenerated zinc oxide

A technology of zinc oxide and zinc metal, which is applied in the field of lead-zinc smelting industry, can solve the problems of increased consumption of cathode aluminum plate, exceeding the standard, and increase of lead content in cathode zinc, and achieve the effect of improving metal recovery rate, simple process flow, and simple and easy operation

Active Publication Date: 2021-08-27
BAIYIN NONFERROUS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is no open circuit of the fluorine and chlorine system in the whole hydrometallurgy process, it will inevitably cause the continuous increase of liquid fluorine and chlorine, especially affecting the zinc electrolysis process
The specific manifestations are: the fluoride ions in the electrolytic solution mainly corrode the oxide film on the surface of the cathode aluminum plate, which makes the zinc stripping operation difficult and increases the consumption of the cathode aluminum plate; the chloride ions in the electrolytic solution mainly have a corrosion and damage effect on the anode lead plate, thereby shortening the anode plate. service life, causing the lead content in cathode zinc to increase or even exceed the standard, affecting the quality of cathode zinc

Method used

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  • A method for recovering zinc metal by utilizing regenerated zinc oxide
  • A method for recovering zinc metal by utilizing regenerated zinc oxide
  • A method for recovering zinc metal by utilizing regenerated zinc oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In June 2018, a lead and zinc factory purchased regenerated zinc oxide produced by a company in Ningxia through the recycling of steel mill smoke and dust. The main components of its chemical detection are shown in Table 1:

[0021] Table 1 Main Component Detection (Incoming Inspection) of Regenerated Zinc Oxide in Ningxia Company

[0022]

[0023] The main components of zinc calcined sand used in conjunction with regenerated zinc oxide are shown in Table 2:

[0024] Table 2 Detection of main components of zinc calcined sand in June 2018 (average value of production)

[0025]

[0026] Through sampling and analysis, zinc calcine and regenerated zinc oxide were mixed at a ratio of 25:1 to obtain a mixed material when preparing the mixed material in actual production. The material and the mixed leachate were mixed and stirred according to the liquid-solid ratio of 3:1, the temperature was controlled at 70°C, the pH value was adjusted to 5.0, and the reaction time wa...

Embodiment 2

[0031] In July 2018, the lead and zinc factory purchased regenerated zinc oxide produced by a company in the Baiyin area through recovery of zinc scum and leaching slag from a zinc smelter. The main components of the chemical test are shown in Table 4:

[0032] Table 4 Detection of Main Components of Regenerated Zinc Oxide in Baiyin Region Company (Incoming Factory Inspection)

[0033]

[0034] The main components of the zinc calcined sand used in conjunction with the regenerated zinc oxide are shown in Table 5:

[0035] Table 5 Detection of main components of zinc calcined sand in July 2018 (average production value) table

[0036]

[0037] Through sampling and analysis, zinc calcine and regenerated zinc oxide were mixed at 22:1 to obtain the mixed material when preparing the mixed material in actual production. The mixed leachate was prepared from the electrolytic waste liquid at the production site and production water at a volume ratio of 2:1. The material and the m...

Embodiment 3

[0042] In December 2018, the lead-zinc factory will purchase regenerated zinc oxide from a company in the Baiyin area and a batch of remaining Ningxia companies for production. The main components of the chemical detection are shown in Table 7:

[0043] Table 7 Detection of the main components of the remaining regenerated zinc oxide in the previous period (average value of production)

[0044]

[0045] The detection of the main components of the zinc calcine used in conjunction with the regenerated zinc oxide is shown in Table 8:

[0046]Table 8 Detection of main components of zinc calcine in December 2018 (production average) table

[0047]

[0048] Through sampling and analysis, zinc calcine and regenerated zinc oxide were mixed at 24:1 to obtain the mixed material when preparing the mixed material in actual production. The mixed leachate was prepared from the electrolytic waste liquid at the production site and production water at a volume ratio of 2:1. The mixture T...

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Abstract

The invention belongs to the technical field of lead-zinc smelting industry, and specifically relates to a method for recovering zinc metal by using regenerated zinc oxide, which comprises mixing zinc calcine and regenerated zinc oxide according to the mass ratio to obtain a mixed material, adding the mixed material to the leaching solution The reaction is carried out, and after pressure filtration, the primary leaching solution is sent to the leaching reaction tank in the wet zinc smelting process, and the filter residue of the primary leaching is sent to the secondary stirring reaction tank for another reaction. The leaching liquid environment formed by diluting the waste electrolyte is The mixed material composed of regenerated zinc oxide and zinc calcine is used for neutral leaching, so that zinc is leached into the solution, and at the same time, when fluorine and chlorine enter the solution, the reduction of fluorine and chlorine content in the liquid environment caused by dilution in the waste electrolyte is supplemented, so that The content of fluorine and chlorine in the whole liquid environment is maintained within the range not exceeding the content of fluorine and chlorine in the original waste electrolyte.

Description

technical field [0001] The invention belongs to the technical field of lead-zinc smelting industry, and in particular relates to a method for recovering zinc metal by utilizing regenerated zinc oxide. Background technique [0002] The production process of regenerated zinc oxide is mostly collected from smelting slag and fire dust in smelters, and fired in kilns and furnaces. The main components of regenerated zinc oxide and zinc calcine are zinc oxide, but the content of some elements is obviously different due to the difference in raw materials and production processes between regenerated zinc oxide and zinc calcine. By comparing the components of regenerated zinc oxide and zinc calcine, the regenerated zinc oxide sample has the characteristics of high zinc, low iron and low silicon compared with calcine, but the content of fluorine and chlorine is higher, especially the content of chlorine is about 30 times that of calcined sand, which has become a major bottleneck restr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B19/20C22B19/30C22B11/02C22B13/02
CPCC22B7/006C22B11/021C22B13/025C22B19/20C22B19/30Y02P10/20
Inventor 崔耀焦晓斌马菲菲冶玉花王庆西翟鑫刘骁龙杨旭旭
Owner BAIYIN NONFERROUS GROUP