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A method for stepwise recovery of valuable metals from zinc-manganese-cobalt-rich slag with multiple controls

A zinc-manganese-cobalt-rich slag, multi-control technology, applied in the improvement of process efficiency, photography process, instruments, etc., can solve the problems of high equipment requirements, complex operation, long process, etc., achieve low equipment requirements, simple operation, avoidance of The effect of pollution

Active Publication Date: 2017-07-14
湖南博一环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the traditional method are: long process, high equipment requirements, complicated operation, and cumbersome process; the addition of traditional oxidants will cause pollution of the solution system; small application range and poor practicability

Method used

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  • A method for stepwise recovery of valuable metals from zinc-manganese-cobalt-rich slag with multiple controls
  • A method for stepwise recovery of valuable metals from zinc-manganese-cobalt-rich slag with multiple controls

Examples

Experimental program
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Effect test

Embodiment 1

[0023] according to figure 1 Process, take 5kg zinc-rich manganese-cobalt slag material into the reaction tank, then add 0.2mol / LH 2 SO 4 The solution was 10 liters, the reaction temperature was controlled at 90° C., the stirring speed was 280 rpm, and the reaction time was 2 hours to obtain a solid-liquid mixture, which was centrifuged to obtain a polymetallic solution and a filter residue. This step is as figure 2 shown in step 1. The concentrations of zinc, manganese and cobalt in the multi-metal solution are 112g / L, 0.92g / L and 2.2g / L respectively.

[0024] Pass the multimetal solution obtained in step 1 into the reaction tank, and simultaneously pass ozone as an oxidizing agent for oxidation, manganese ions in the multimetal solution are preferentially oxidized and sink to the bottom, and are separated and recovered from the multimetal solution. During the reaction process, a potentiometer or an electrochemical workstation is used to detect the open circuit voltage d...

Embodiment 2

[0028] according to figure 1 Process, take 10kg zinc-rich manganese-cobalt slag material into the reaction tank, then add 0.2mol / LH 2 SO 4 The solution was 15 liters, the reaction temperature was controlled at 95° C., the stirring speed was 300 rpm, and the reaction time was 2 hours to obtain a solid-liquid mixture, which was centrifuged to obtain a polymetallic solution and a filter residue. This step is as figure 2 shown in step 1. The concentrations of zinc, manganese and cobalt in the multi-metal solution are 114g / L, 0.94g / L and 2.0g / L respectively.

[0029]Pass the multimetal solution obtained in step 1 into the reaction tank, and simultaneously pass ozone as an oxidizing agent for oxidation, manganese ions in the multimetal solution are preferentially oxidized and sink to the bottom, and are separated and recovered from the multimetal solution. During the reaction process, a potentiometer or an electrochemical workstation is used to detect the open circuit voltage d...

Embodiment 3

[0033] according to figure 1 Process, take 7kg zinc-rich manganese-cobalt slag material into the reaction tank, then add 0.2mol / LH 2 SO 4 The solution was 15 liters, the reaction temperature was controlled at 85° C., the stirring speed was 250 rpm, and the reaction time was 2.5 hours to obtain a solid-liquid mixture, which was centrifuged to obtain a polymetallic solution and a filter residue. This step is as figure 2 shown in step 1. The concentrations of zinc, manganese and cobalt in the multi-metal solution are 108g / L, 0.98g / L and 2.1g / L respectively.

[0034] Pass the multimetal solution obtained in step 1 into the reaction tank, and simultaneously pass ozone as an oxidizing agent for oxidation, manganese ions in the multimetal solution are preferentially oxidized and sink to the bottom, and are separated and recovered from the multimetal solution. During the reaction process, a potentiometer or an electrochemical workstation is used to detect the open circuit voltage...

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Abstract

The invention discloses a method for recycling valuable metals step by step from zinc-manganese-cobalt-rich slag in a multiplex control manner. The method comprises the steps of a, processing the zinc-manganese-cobalt-rich slag by utilizing an acid liquor leaching method to obtain multi-metal solution containing manganese, cobalt and zinc; b, introducing ozone gas into the multi-metal solution, previously oxidizing and separating the manganese ions, and filtering the solution to obtain manganese slag and cobalt-zinc-containing solution; c, introducing ozone into the cobalt-zinc-containing solution, oxidizing and separating cobalt ions in the solution, and filtering the solution to obtain the cobalt slag and the zinc-containing solution; d, directly returning the zinc-containing solution to an electrodeposition section so as to directly recycle the zinc ions in the zinc-containing solution. By adopting the method, the smelting process for recycling manganese and cobalt in the multi-metal ions can be simplified, and the separation recycling step of manganese and cobalt can be completed by adopting the same reaction device. The direct recycling rate of manganese and cobalt in the method is high, cleanliness and no pollution can be realized, simplicity in operation can be realized, the equipment investment expense can be saved, and other operating management links can be saved.

Description

technical field [0001] The invention relates to a method for separating and recovering valuable metals from a multi-metal solution, and more specifically, relates to a method for recovering valuable metals step by step with multiple controls from zinc-rich manganese-cobalt slag. Background technique [0002] In the zinc smelting process, a zinc electrolyte purification section is required to remove the influence of other harmful metal ion impurities in the solution on the electrowinning process. When the concentration of cobalt ions is high, it may cause burning board phenomenon, which will affect the production process. And cause a certain amount of economic loss. Therefore, there will be a special cobalt removal process in the process of zinc smelting, such as arsenic salt purification method, antimony purification method, etc., so along with the cobalt removal process, there will be a certain amount of cobalt-containing slag, which contains zinc, cobalt and Valuable meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B23/00C22B47/00C22B19/30C25C1/16
CPCY02P10/20
Inventor 田庆华辛云涛郭学益王恒利李栋
Owner 湖南博一环保科技有限公司
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