Process for comprehensively recycling valuable metals from zinc-containing material

A technology for valuable metals and materials, applied in the field of metal recycling, can solve problems such as the inability to achieve comprehensive recovery of valuable metals, environmental pollution, etc., and achieve the effects of low overall operating costs, high quality, and small washing water volume

Inactive Publication Date: 2019-05-21
江西思远再生资源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of increasingly stringent environmental protection requirements, this process has some obvious restrictive factors, such as: valuable metals such as Pb, Cu, and Cd enter the leaching residue and purification residue, and the comprehensive recovery of valuable metals cannot be achieved. , and it is easy to cause environmental pollution and other problems

Method used

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  • Process for comprehensively recycling valuable metals from zinc-containing material
  • Process for comprehensively recycling valuable metals from zinc-containing material
  • Process for comprehensively recycling valuable metals from zinc-containing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] This embodiment provides a process for comprehensive recovery and utilization of valuable metals from zinc-containing materials, including the following steps:

[0073] 1) Pretreatment section of zinc-containing materials

[0074] Zinc-containing materials are divided into two categories: soot materials and slag materials; taking zinc-containing materials with a mass of 20.80% of zinc and 15.19% of copper as an example:

[0075] A) Soot materials are sent to the leaching intermediate tank through the pneumatic silo;

[0076] B) After the slag material is sent to the silo by driving, it is transported to the ball mill equipment through the belt. After the slag material is ball milled, it enters the transfer tank and is pumped into the cyclone for classification. The target fine material overflow is sent to the leaching intermediate tank, mixed with soot materials and a certain amount of circulating leaching solution obtained in the following step V), and then enters the...

Embodiment 2

[0103] Except for changes in some process control parameters, other operations in this implementation are the same as in Example 1:

[0104] The process control parameters of the first-stage leaching and the second-stage leaching in step C) are: leach solution temperature 55°C, pH 6.0, stirring 120r / min, leaching time 1.5h;

[0105] The flow ratio of the zinc-loaded organic flow rate to the cleaning liquid in step I) is 30:1; the flow rate ratio of the zinc-loaded organic flow rate to the chloride ion washing liquid flow rate is 30:1; the composition requirements of the two-stage zinc sulfate back-extraction pre-liquid in step I) : 200g / L;

[0106] Step K) adjusting the pH of the low-acid zinc sulfate rich solution to 5.0 with zinc oxide;

[0107] In step L), the mass of sulfuric acid added to the rich solution of zinc sulfate after degreasing is 100g / l, the crystallization temperature of zinc sulfate monohydrate is 60°C, and the crystallization time is 3h;

[0108] The copp...

Embodiment 3

[0110] Other operations in this implementation are the same as those in Embodiment 1, except for the following operations:

[0111] The process control parameters of the first-stage=leaching and second-stage leaching of step C) are: temperature 75°C, pH 6.2, stirring 190r / min, leaching time 3.0h;

[0112] The flow ratio of the zinc-loaded organic flow to the cleaning liquid in step I) is 10:1; the flow ratio of the zinc-loaded organic flow to the chloride ion washing liquid is 10:1; the composition requirements of the two-stage zinc sulfate back-extraction pre-liquid in step I) : 480g / L;

[0113] Step K) adjusting the pH of the low-acid zinc sulfate rich solution to 2.5 with zinc oxide;

[0114] In step L), the quality of sulfuric acid added to the zinc sulfate rich solution per liter of oil removal is 300g / l, the crystallization temperature range is 80°C, and the crystallization time is 5h;

[0115] In step P), the ratio of the copper extractant flow rate to the copper pre-...

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Abstract

The invention discloses a process for comprehensively recycling valuable metals from a zinc-containing material. The process can recycle other valuable metals, expect from zinc, such as copper, lead and cadmium from the zinc-containing material. The conventional wet-process smelting process only can recycle one or two main materials, and other metals are in the slag, so that the comprehensive benefits are not obvious. Zinc sulfate and copper sulfate products produced in the process have the advantages of being high in quality, low in production cost and the like in comparison with products produced by a conventional method. According to the process disclosed by the invention, zinc leaching efficiency in the zinc-containing material is 85-97% and copper leaching efficiency in the zinc-containing material is 85-95%; a zinc extracting agent I has extracting efficiency of 95% or higher on zinc, and a copper extracting agent II has extracting efficiency of 95% or higher on copper; purity ofproduced zinc sulphate monohydrate is 99.9% or higher; and the diameters of produced copper sulfate pentahydrate crystalline grains can reach 2 mm, and purity of the produced copper sulfate pentahydrate crystalline grains is 99.6% or higher.

Description

technical field [0001] The invention belongs to the technical field of metal recovery, and in particular relates to a process for comprehensively recovering and utilizing valuable metals from zinc-containing materials. Background technique [0002] At present, zinc hydrometallurgy is the most important zinc smelting method in the world today, and its output accounts for more than 85% of the world's total zinc output. [0003] The traditional hydrometallurgy process generally includes: neutral leaching, purification, electrolysis and other processes. In the case of increasingly stringent environmental protection requirements, this process has some obvious restrictive factors, such as: valuable metals such as Pb, Cu, and Cd enter the leaching residue and purification residue, and the comprehensive recovery of valuable metals cannot be achieved. , and it is easy to cause problems such as environmental pollution. Contents of the invention [0004] The purpose of the present ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C22B13/00C22B17/00C22B19/20C22B3/26
CPCY02P10/20
Inventor 蒋航宇朱富龙刘宇豪
Owner 江西思远再生资源有限公司
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