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A method for preparing high-purity rhenium powder from rhenium-containing high-arsenic copper sulfide

A copper sulfide, high-purity technology, applied in the field of preparing high-purity rhenium powder

Active Publication Date: 2019-02-15
KUNMING METALLURGY COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] These processes are mainly to separate and recover rhenium from leaching raw ore, waste catalyst, waste liquid and soot, and the method of preparing high-purity rhenium powder by leaching with nitric acid-neutralization of calcium-containing substances-resin exchange-precipitation of rhenium with potassium chloride-hydrogen reduction has not yet been seen. to report

Method used

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  • A method for preparing high-purity rhenium powder from rhenium-containing high-arsenic copper sulfide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Refer to the attached figure, conditions: 1000 grams of rhenium-arsenic copper sulfide raw material, the amount of nitric acid added is twice the weight ratio of the rhenium-arsenic copper sulfide raw material, slowly heated to 85°C, stirring speed is 250rpm, leaching time is 5h, flue gas Enter the absorption tower, use oxygen enrichment and water spray to absorb, form dilute nitric acid, after leaching, filter and wash to obtain leaching liquid and leaching residue respectively, add quicklime to the leaching liquid and stir to neutralize residual nitric acid, control pH to 8.5, filter and wash , to obtain arsenic-copper slag and a low-content rhenium-containing filtrate, respectively, wherein the arsenic and copper in the slag enter the slag in the form of calcium arsenate and copper hydroxide respectively; the low-content rhenium-containing filtrate uses D296 resin for ion exchange, after exchange and elution , to obtain pure ammonium rhenate solution, after heating an...

Embodiment 2

[0031] Refer to the attached drawing, conditions: 1500 grams of rhenium-arsenic copper sulfide raw material, the amount of nitric acid added is 3.5 times the weight ratio of rhenium-arsenic copper sulfide raw material, slowly heated to 95°C, stirring speed is 250rpm, leaching time is 4h, flue gas Enter the absorption tower, use sodium persulfate and water spray to absorb, form dilute nitric acid, filter and wash after leaching, obtain leaching liquid and leaching residue respectively, add hydrated lime to the leaching liquid and stir to neutralize residual nitric acid, control pH to 9.0, filter and Wash to obtain arsenic-copper slag and low-content rhenium-containing filtrate respectively, wherein the arsenic and copper in the slag enter the slag in the form of calcium arsenate and copper hydroxide respectively; the low-content rhenium-containing filtrate uses Tulsion CR-75 resin for ion exchange, after Exchange and elution to obtain pure ammonium rhenate solution, after heatin...

Embodiment 3

[0033] Refer to the attached drawing, conditions: 8000 grams of rhenium-arsenic-containing copper sulfide raw material, the amount of nitric acid added is 4.0 times the weight ratio of the rhenium-arsenic-containing copper sulfide raw material, slowly heated to 85°C, the stirring speed is 250rpm, the leaching time is 5h, the flue gas Enter the absorption tower, use hydrogen peroxide and water spray to absorb, form dilute nitric acid, filter and wash after leaching, obtain leaching liquid and leaching residue respectively, add hydrated lime to the leaching liquid and stir to neutralize residual nitric acid, control pH to 9.5, filter and wash, The arsenic-copper slag and the low-content rhenium-containing filtrate were respectively obtained, wherein the arsenic and copper in the slag entered the slag in the form of calcium arsenate and copper hydroxide respectively; the low-content rhenium-containing filtrate was ion-exchanged with Tulsion RCX-5143 resin, and after exchange and E...

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Abstract

The invention discloses a method for high-effectively enriching rhenium from rhenium-containing high-arsenic copper sulfide. The method includes: rhenium-rich slag and a certain amount of alkali are mixed to obtain size, and pressing, heating and alkaline leaching is performed, and after filtering and washing is performed, rhenium enters extract in the form of ammonium rhenate, and a part of arsenic enters the extract in the form of sodium arsenate. Reactive metal power is heated to replace the rhenium in the extract, and after filtering and washing is performed, the rhenium oxide is enriched, and separation between the rhenium and the arsenic can be achieved. The raw material of the method is the rhenium-rich slag which is obtained by sulfide precipitation of acidic wastewater generated during a production process of copper smelting enterprises and is rich in copper and arsenic; the method can fully leach the rhenium, and the metal power is used to replace the extract to obtain a rhenium-enrichment; the process of rhenium extraction can be simplified, and the cost of rhenium extraction is reduced. The method is simple in process, is short in flow, is high in enrichment ratio, is high in material adaptability, is low in cost, is easy to industrialize, has good application value, and can increase output value and profit of the copper smelting enterprises.

Description

technical field [0001] The invention belongs to the field of rare metal metallurgy and material preparation, and relates to a method for preparing high-purity rhenium powder from rhenium-containing high-arsenic copper sulfide. Background technique [0002] The rhenium-containing high-arsenic copper sulfide raw material is a kind of difficult-to-handle rhenium extraction material, which generally comes from the materials produced in the intermediate smelting process of copper smelters. At present, China is the country that produces the most copper in the world, and a large amount of this material Rhenium material has a high value, and now major copper smelting enterprises are paying attention to the extraction and recovery of rhenium. In order to recover rhenium better, a method for preparing high-purity rhenium powder from rhenium-containing high-arsenic copper sulfide was invented. At present, the methods for extracting rhenium from various rhenium-containing materials are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/20
Inventor 范兴祥余宇楠张凤霞
Owner KUNMING METALLURGY COLLEGE
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