Enrichment method for rhenium in acid wastewater of copper smelting smoke purification system

A flue gas purification system and acid wastewater technology, which is applied in chemical instruments and methods, gaseous effluent wastewater treatment, water/sewage treatment, etc., can solve the problems of less research on rhenium recovery, difficulty in enrichment and recovery, easy dispersion of rhenium, etc. , to achieve the effect of improving the comprehensive utilization rate of resources, high enrichment rate and low price

Inactive Publication Date: 2019-03-26
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acidic wastewater can be used as a raw material for extracting rhenium after cyclic enrichment, but there are few studies on the recovery of rhenium in acidic wastewater, because the grade of rhenium in raw materials is low, and rhenium is easy to disperse during the smelting process, making it difficult to enrich and recover

Method used

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  • Enrichment method for rhenium in acid wastewater of copper smelting smoke purification system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Measure 5L of acidic wastewater from the copper smelting flue gas purification system, containing 10mg / L of rhenium in the acidic wastewater, place it on an electric heating plate and heat it to 40°C, then add saturated sodium thiosulfate solution, the saturated sodium thiosulfate added per liter of acidic wastewater The amount of the solution is based on the molar content of sodium thiosulfate, and the molar amount of sodium thiosulfate contained in the added saturated sodium thiosulfate solution is 1.2 times the molar amount of copper in the acidic waste liquid. After stirring for 3 hours in the heat preservation state, rhenium precipitated in the form of sulfide, left to age for a period of time and then filtered. The volume of the filtrate was 4.96L, and the rhenium content in the filtrate was 0.93mg / L. The rest of the rhenium entered the filter residue and dried. Filter residue, just obtain rich rhenium residue 3.88g, contain rhenium 0.083%. Based on slag, the enri...

Embodiment 2

[0011] Measure 5L of acidic wastewater from the flue gas purification system of copper smelting. The acidic wastewater contains 10mg / L of rhenium, heat it on a hot plate to 30°C, and then add saturated sodium thiosulfate solution. The saturated sodium thiosulfate added per liter of acidic wastewater The amount of the solution is based on the molar content of sodium thiosulfate, and the molar amount of sodium thiosulfate contained in the added saturated sodium thiosulfate solution is 1.3 times the molar amount of copper in the acidic waste liquid. After stirring for 4 hours under heat preservation, rhenium precipitated in the form of sulfide, left to age for a period of time and then filtered. The volume of the filtrate was 4.97L, and the rhenium content in the filtrate was 0.93mg / L. The remaining rhenium entered the filter residue and dried again. Filter residue, just obtain rich rhenium residue 3.90g, contain rhenium 0.085%. Based on slag, the enrichment rate of rhenium is 97...

Embodiment 3

[0013] Measure 5L of acidic wastewater from the flue gas purification system of copper smelting. The acidic wastewater contains 10mg / L of rhenium, heat it on a hot plate to 50°C, and then add saturated sodium thiosulfate solution. The saturated sodium thiosulfate added per liter of acidic wastewater The amount of the solution is based on the molar content of sodium thiosulfate, and the molar amount of sodium thiosulfate contained in the added saturated sodium thiosulfate solution is 1.1 times the molar amount of copper in the acidic waste liquid. After stirring for 2 hours in the heat preservation state, rhenium precipitated in the form of sulfide, left to age for a period of time and then filtered. The volume of the filtrate was 4.96L, and the rhenium content in the filtrate was 0.93mg / L. The remaining rhenium entered the filter residue and dried. Filter residue, just obtain rich rhenium residue 3.85g, contain rhenium 0.082%. Based on slag, the enrichment rate of rhenium is 9...

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Abstract

The invention discloses an enrichment method for rhenium in acid wastewater of a copper smelting smoke purification system. The temperature of the acid wastewater is 30 DEG C-50 DEG C through heating.saturated sodium thiosulfate solution is added into a reaction vessel, the quantity of the saturated sodium thiosulfate solution added into per liter of acid wastewater is calculated with the sodiumthiosulfate molar content, the sodium thiosulfate molar content in the added saturated sodium thiosulfate solution is 1.1-1.3 times of the copper molar content in the acid waste liquid, stirring is conducted in the adding process of the saturated sodium thiosulfate solution, and thermal reaction is conducted for 2-4 h. After the reaction, reaction liquid is aged, filtrated and dried to obtain rhenium-containing enrichment slag. The enrichment method has the beneficial effects that the enrichment rate of rhenium in the acid water is high, a precipitation enrichment process for rhenium in the acid wastewater is built, the recovery rate of valuable metal is increased, production cost is lowered, resources are saved, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to a method for enriching rhenium in the acid wastewater of a copper smelting flue gas purification system, which is suitable for treating the acid wastewater of the copper smelting flue gas purification system. Background technique [0002] During the copper smelting process, the rhenium sulfide associated with copper in the copper concentrate is easily oxidized to Re when the temperature reaches above 800°C. 2 o 7 , and Re 2 o 7 Volatile, so rhenium is represented by Re 2 o 7 The form enters the flue gas, and part of it is deposited in the soot. When the flue gas is in the wet purification system, Re 2 o 7 Dissolved with water to ReO 4 - Ionic forms exist in acidic wastewater. During this smelting process, about 60-70% of the rhenium in the copper concentrate enters the flue gas, 16-17% enters the matte, and 12-15% enters the slag. [0003] During the blowing process of matte, 90% of the rhenium in the matte enters the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B61/00C22B7/00C02F9/10C02F103/18
CPCC02F1/001C02F1/02C02F1/5236C02F1/58C02F9/00C02F2103/18C22B7/006C22B61/00Y02P10/20
Inventor 赵书运李娟张鹏吴红星郑江华卢越刚苏俊敏徐文芳张妮王辉
Owner JINCHUAN GROUP LIMITED
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