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A method for refining rare metals and recovering mine waste slag

A technology of rare metals and recycling methods, which is applied to the improvement of process efficiency, instruments, optics, etc., can solve the problems of low recovery rate of rare metals, waste of resources, and unrecyclable rare metals, so as to improve recovery rate, reduce waste, and guarantee The effect of purity

Active Publication Date: 2021-12-17
湖南金隆再生金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, a lot of mining waste residues are produced every year in our country. If these mining waste residues are randomly stacked, they will cause certain environmental pollution. However, this mining waste residue contains a certain amount of rare metals. Use waste slag to recover rare metals, and the existing mining waste slag rare metal recovery process is relatively simple, the recovery rate of rare metals is low, and there are still many rare metals that cannot be recycled, resulting in a waste of resources

Method used

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Examples

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Effect test

Embodiment 1

[0027] An embodiment of the present invention provides a method for refining rare metals and recovering mining waste slag. The method includes the following steps:

[0028] S1. Pretreatment: prepare mining waste residue, crush the obtained mining waste residue, and control the diameter of the crushed mining waste residue to 10mm;

[0029] S2. Acid leaching: add concentrated sulfuric acid solution to the crushed mining waste residue, stir evenly, stir for 5 minutes, and stir at a speed of 400r / min, leaching treatment, leaching time is 2 hours, and then perform solid-liquid separation to obtain leachate As well as the leaching slag, filter the leaching liquid, wash the leaching slag 2-3 times, first dehydrate, then dry, the drying temperature is 100°C, and the drying time is 60 minutes;

[0030] S3, leach solution treatment: add hypophosphorous acid to the leach solution, fully stir and mix evenly, then perform solid-liquid separation to obtain a metal mixture, heat the metal mi...

Embodiment 2

[0036] An embodiment of the present invention provides a method for refining rare metals and recovering mining waste slag. The method includes the following steps:

[0037] S1. Pretreatment: prepare mining waste residue, crush the obtained mining waste residue, and control the diameter of the crushed mining waste residue to 13mm;

[0038] S2. Acid leaching: add concentrated sulfuric acid solution to the crushed mining waste residue, stir evenly, stir for 7.5 minutes, and stir at a speed of 300r / min, leaching treatment, leaching time is 1.5h, and then carry out solid-liquid separation, Obtain the leaching solution and leaching slag, filter the leaching solution, wash the leaching residue 2-3 times, first dehydrate, then dry, the drying temperature is 150°C, and the drying time is 45 minutes;

[0039] S3, leach solution treatment: add hypophosphorous acid to the leach solution, fully stir and mix evenly, then perform solid-liquid separation to obtain a metal mixture, heat the me...

Embodiment 3

[0045] An embodiment of the present invention provides a method for refining rare metals and recovering mining waste slag. The method includes the following steps:

[0046] S1. Pretreatment: prepare mining waste residue, crush the obtained mining waste residue, and control the diameter of the crushed mining waste residue to 15mm;

[0047] S2. Acid leaching: add concentrated sulfuric acid solution to the crushed mining waste residue, stir evenly, stir for 10 minutes, and stir at a speed of 200r / min, leaching treatment, leaching time is 1h, and then carry out solid-liquid separation to obtain leachate As well as the leaching slag, filter the leaching solution, wash the leaching slag 2-3 times, first dehydrate, then dry, the drying temperature is 200°C, and the drying time is 30 minutes;

[0048] S3, leach solution treatment: add hypophosphorous acid to the leach solution, fully stir and mix evenly, then perform solid-liquid separation to obtain a metal mixture, heat the metal mi...

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Abstract

The invention provides a rare metal refining and mining waste slag recovery method, which relates to the technical field of rare metal recovery. The method for refining rare metals and recovering mining waste slag includes the following steps: S1. Pretreatment: prepare mining waste slag, and crush the obtained mining waste slag; S2. Acid leaching: add concentrated Sulfuric acid solution, stirred evenly, leaching treatment, and then solid-liquid separation to obtain leaching liquid and leaching residue. The present invention first utilizes the difference in metal activity to recycle copper simple substance, and then utilizes the strength of metal activity to purify and recover the silver and gold in mining waste residue, effectively removing other impurities in the silver alloy and ensuring the silver The purity of the alloy also improves the recovery rate of rare metals. By recycling mining waste residues, on the one hand, it reduces the pollution of mining waste residues to the environment, and on the other hand, it also greatly reduces the waste of rare metal resources.

Description

technical field [0001] The invention relates to the technical field of rare metal recovery, in particular to a method for refining rare metals and recovering mining waste slag. Background technique [0002] Rare metals are mainly used in the manufacture of special steels, superhard alloys and high-temperature resistant alloys. In the electrical industry, chemical industry, ceramics industry, atomic energy industry and rocket technology, the names of rare metals have certain relativity. Extensive research on rare metals, the discovery of new sources and new refining methods, and the expansion of their application range, the boundaries between rare metals and other metals will gradually disappear. For example, the content of some rare metals in the earth’s crust is higher than copper, mercury, cadmium, etc. More metal. [0003] At present, a lot of mining waste residues are produced every year in our country. If these mining waste residues are randomly stacked, they will caus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B11/02C22B15/00C25C1/20
CPCC22B7/04C22B7/007C22B15/0067C22B11/023C22B11/044C25C1/20Y02P10/20
Inventor 王克强
Owner 湖南金隆再生金属有限公司
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