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Method for recovering rhenium from metallurgical waste liquid

A technology for waste liquid and filtrate, applied in the direction of improving process efficiency, can solve the problems of volatile, high investment cost, and large environmental pollution, and achieve the effect of efficient recovery, wide source and low cost

Inactive Publication Date: 2018-03-02
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solvent extraction method is easy to operate, strong in selectivity, and high in separation efficiency, but the extraction agent is expensive, and most of them are flammable, volatile, and toxic substances, which are easy to cause environmental pollution
[0007] The existing rhenium recovery process has disadvantages such as high investment cost, large environmental pollution, and poor extraction effect of low-concentration rhenium. If a new process with simple process, strong practicability, low investment, low operating cost, and high recovery efficiency can be developed, it will have significant economic value

Method used

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  • Method for recovering rhenium from metallurgical waste liquid
  • Method for recovering rhenium from metallurgical waste liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Using the smelting waste liquid provided by the copper smelter as raw material, the smelting waste liquid contains 260 mg / L of copper, 194 mg / L of magnesium, 204 mg / L of iron, 0.65 mg / L of rhenium and 7944 mg / L of sulfuric acid. L.

[0023] Add a precipitating agent (mixed by calcium hydroxide and calcium oxide in a weight ratio of 4:1) to the rhenium-containing smelting waste liquid until the pH of the solution is 9, press filter to separate, collect the filtrate, adjust the pH to 5~7, and put The filtrate passes through the biochar adsorption tower with an adsorption temperature of 15°C and a pH of 6 to further adsorb coexisting ions; then enters the stirring tank, and adds biochar to adsorb rhenium. When the adsorption reaches saturation, stop the adsorption and press filter to separate; The cake was sent to a rotary calciner for calcination. The calcination temperature was 550°C, the heating rate was 10°C / min, and the calcination time was 6 h. It was absorbed with 0...

Embodiment 2

[0025] Using the smelting waste liquid provided by the molybdenum smelter as raw material, the smelting waste liquid contains 520 mg / L copper, 980 mg / L molybdenum, 146 mg / L iron, 26 mg / L rhenium and 56870 mg / L sulfuric acid. L.

[0026] Add a precipitating agent (mixed by calcium hydroxide and calcium oxide at a weight ratio of 2:1) to the rhenium-containing smelting waste liquid until the pH of the solution is 10, press filter to separate, collect the filtrate, adjust the pH to 5~7, and put The filtrate passes through the biochar adsorption tower with an adsorption temperature of 20°C and a pH of 5 to further absorb coexisting ions; then enters the stirring tank, and adds biochar to adsorb rhenium. When the adsorption reaches saturation, stop the adsorption and press filter to separate; The cake was sent to a rotary calciner for calcination. The calcination temperature was 650°C, the heating rate was 10°C / min, and the calcination time was 8 h. It was absorbed with 1 mol / L amm...

Embodiment 3

[0028] Using the smelting waste liquid provided by the iron smelter as raw material, the smelting waste liquid contains 380 mg / L of copper, 135 mg / L of nickel, 870 mg / L of iron, 0.69 mg / L of rhenium, and 82610 mg / L of sulfuric acid. L.

[0029] Add a precipitating agent (mixed by calcium hydroxide and calcium oxide at a weight ratio of 6:1) to the rhenium-containing smelting waste liquid until the pH of the solution is 11, press filter to separate, collect the filtrate, adjust the pH to 5~7, and put The filtrate passes through the biochar adsorption tower at 25°C and pH 4 to further absorb the coexisting ions; then enters the stirring tank and adds biochar to adsorb rhenium. When the adsorption reaches saturation, the adsorption is stopped and separated by pressure filtration; the filter cake is sent to Calcination in a rotary calciner at a temperature of 750°C, a heating rate of 15°C / min, a calcination time of 8 h, and absorption with a 2 mol / L KOH solution to obtain potassiu...

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Abstract

The invention relates to a method for recovering rhenium from metallurgical waste liquid. A precipitant is added into the rhenium-containing metallurgical waste liquid till the pH of the liquid is 8-12, filter pressing is conducted for separation, filter liquid is collected, and the pH of the filter liquid is adjusted to be 5-7; the filter liquid is pre-treated through a biological carbon adsorption tower, and thus coexisting ions are further removed; then the filter liquid enters a stirring reactor, and biological carbon is added to adsorb rhenium; after adsorption is conducted till saturation is achieved, stirring is stopped, filter pressing is conducted for separation, and a filter cake is taken to be sent into a calcinatory to be calcined; and calcined gas is absorbed through alkalineliquid to obtain a perrhenate product. According to the method for recovering rhenium from the metallurgical waste liquid, a novel technique is adopted to recover rhenium in the metallurgical waste liquid, and the method has the remarkable advantages that the technique is simple, the practicability is high, the investment is few, the operation cost is low, and the recovery rate is high.

Description

technical field [0001] The invention belongs to the field of inorganic chemical industry, and in particular relates to a method for recovering rhenium from smelting waste liquid. Background technique [0002] Rhenium (Re) is a rare metal, the relative distribution in the earth's crust is about one part per billion, and it is one of the most dispersed elements in the world. As an important strategic resource, rhenium has many excellent properties such as high melting point, high density, corrosion resistance, wear resistance and high hardness. It is mainly used in aerospace and petrochemical industries, and also in electronics industry and nuclear radiation medicine. and other fields. Pure rhenium ore is extremely rare. So far, only pure rhenium ore has been found in the Kudryavy volcanic area of ​​Russia. L), iron, uranium, lead, platinum and other deposits. During the smelting process of rhenium-containing minerals, more than 80% of rhenium enters the smelting waste liqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B61/00
CPCC22B7/00C22B61/00Y02P10/20
Inventor 胡晖孙龙利卢慧娟王培黄永生陈晓晖
Owner FUZHOU UNIV
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