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Method for recovering cobalt in cobalt-containing waste residues from zinc smelting

A zinc smelting and waste residue technology is applied in the field of recovering cobalt from zinc smelting cobalt-containing waste residue to achieve the effect of reducing separation and recovery costs

Inactive Publication Date: 2011-02-16
BAIYIN NONFERROUS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the applicant knows, up to now, there is no method to recover and utilize zinc to smelt valuable metals such as cobalt in cobalt-containing waste slag at a high rate by using wet process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1 Ball milling: Weigh 2 tons of cobalt-containing waste slag from zinc smelting and add water for wet ball milling. The weight ratio of water: slag is 4.8:1; after ball milling, the particle size -200 mesh is greater than 60%, and the ore slurry is sent into 15m 3 Leach out the stirring tank and start stirring;

[0024] Step 2 leaching: Slowly add 1.54 tons of concentrated sulfuric acid with a weight percentage concentration of 93% to the leaching stirring tank; at the same time, heat the liquid in the leaching stirring tank, the reaction temperature is 65-75 ° C, the time for adding concentrated sulfuric acid is 1.5 hours, and the concentrated sulfuric acid is added After finishing, continue to stir and react to pH value 4.5; Obtain leaching pulp;

[0025] Step 3 press filter lead slag: put the leaching pulp obtained in step 2 into a filter press; obtain lead slag and leaching filtrate; lead slag is stored as a lead refining raw material for transportation; lead s...

Embodiment 2

[0034] Step 1 ball milling: Weigh 2 tons of cobalt-containing waste slag from zinc smelting and add water to carry out wet ball milling. The weight ratio of water: slag is 4.5:1; the rest is the same as in Example 1;

[0035] Step 2 leaching: add 1.46 tons of concentrated sulfuric acid to the leaching stirring tank; the time for adding the concentrated sulfuric acid is 1.0 hour, after adding the concentrated sulfuric acid, continue to stir and react until the pH value is 5.0; the rest are the same as in Example 1;

[0036] Step 3 press filter lead slag: with embodiment 1; Obtain lead slag 290kg, lead content is 31%;

[0037] Step 4 removes iron and manganese: the leaching filtrate that step 3 obtains enters 15m 3 Remove iron and manganese stirring tank, and analyze the iron and manganese content of the leaching filtrate. The measured iron and manganese contents in the leachate are 372mg / l and 390mg / l respectively, and the volume of the leaching liquid in the iron and manganese...

Embodiment 3

[0044] Step 1 ball milling: Weigh 2 tons of cobalt-containing waste slag from zinc smelting and add water to carry out wet ball milling. The weight ratio of water: slag is 5.5:1; the rest is the same as in Example 1;

[0045] Step 2 leaching: Add 1.50 tons of concentrated sulfuric acid to the leaching stirring tank; the time for adding the concentrated sulfuric acid is 80 minutes, after adding the concentrated sulfuric acid, continue to stir and react until the pH value is 4.7; the rest are the same as in Example 1;

[0046] Step 3 press filter lead slag: with embodiment 1; Get lead slag 260kg, lead content is 35%;

[0047] Step 4 removes iron and manganese: the leaching filtrate that step 3 obtains enters 15m 3 Remove iron and manganese stirring tank, and analyze the iron and manganese content of the leaching filtrate, the measured iron and manganese contents in the leach solution are 308mg / l and 320mg / l respectively, and the volume of the leaching liquid in the iron and mang...

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Abstract

The invention relates to a method for recovering cobalt, and the like in cobalt-containing waste residues from zinc smelting, solving the technical problems of providing the method for recovering the cobalt, and the like in the cobalt-containing waste residues from zinc smelting, which has the advantages of high enrichment ratio and good cobalt precipitation effect, recovers and utilizes valuable metals such as the cobalt, and the like in the cobalt-containing waste residues from zinc smelting with lowest cost and realizes the purpose of comprehensively utilizing the cobalt-containing waste residues from zinc smelting with high value. The method for recovering the cobalt, and the like in the cobalt-containing waste residues from zinc smelting is characterized by comprising the following steps of: taking the cobalt-containing waste residues from zinc smelting as a raw material; carrying out process flows of ball milling, leaching, filter pressing lead slags, removing iron and manganese, filter pressing iron and manganese slags, precipitating the cobalt and filter pressing cobalt slags; and obtaining the cobalt raw material with the cobalt content larger than 30 percent in the cobalt-containing waste residues from zinc smelting, thereby realizing efficient separation of metals, such as the cobalt, zinc, nickel, cadmium, and the like and completely solving the problem of difficult separation of the cobalt, the zinc, the nickel, the cadmium, and the like of the prior art. The method can be also used for separating out the lead slags with the lead content larger than 30 percent, cadmium sponge used for producing refined cadmium, nickel slags with the nickel content larger than 10 percent and a zinc sulfate solution.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal smelting, and relates to a cobalt production method, in particular to a method for recovering cobalt from zinc smelting cobalt-containing waste slag. Background technique [0002] Cobalt-containing waste slag from zinc smelting is a kind of zinc slag produced in the wet zinc production process. Its composition is relatively complex. In addition to a large amount of metal zinc, it also contains a small amount of cadmium, lead, and trace amounts of nickel, cobalt and other valuable metals. . Because it is difficult to deal with this kind of waste residue, most of the zinc wet process manufacturers pile up this kind of waste residue. [0003] In recent years, people have gradually begun to pay attention to the exploration and research of this kind of waste residue, and have successively introduced technologies such as vacuum and fire methods. Some manufacturers have leached the waste residu...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B3/08C22B7/04C22B3/44
CPCY02P10/20
Inventor 张昱琛张鸿烈王文广杨斌金忠李志强
Owner BAIYIN NONFERROUS GROUP
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