Method for efficiently recovering copper and rhenium from copper smelting waste acid

A technology for copper smelting and copper recovery, applied in the direction of improving process efficiency, etc., can solve the problems of low copper rhenium recovery rate, neglect, waste of secondary resources, etc., to improve the quality of liquid-solid separation, improve the precipitation effect, and increase the recovery rate Effect

Active Publication Date: 2014-05-07
BAIYIN NONFERROUS GROUP
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  • Abstract
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Problems solved by technology

[0003] At present, during the smelting process of the oxygen-enriched molten pool of the silver furnace, the rhenium sulfide associated in the copper sulfide ore is oxidized into volatile rhenium oxide, and about 80% of the rhenium oxide enters the flue gas. During the sulfuric acid purification and washing process, the flue gas The copper and rhenium in the copper smelting waste acid respectively enter into the copper smelting waste acid, and the rhenium in the copper smelting waste acid exists in the form of perrhenic acid. Since the copper concentrate purchased in the copper smelting process has a wide range of sources and complex components, the heavy metals contained in the copper smelting waste acid There are many kinds, including copper, lead, arsenic, zinc, antimony, selenium, bismuth, etc., among which copper and ars

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  • Method for efficiently recovering copper and rhenium from copper smelting waste acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Take 5 m of copper smelting sewage acid 3 , spent acid composition: H 2 SO 4 : 50 g / L, Cu : 0.2 g / L, As : g / L, Re : 0.01 g / L;

[0022] (2) Add the copper smelting dirty acid in step 1 into a filter press to filter and remove lead in the copper smelting dirty acid, the filtrate is the copper smelting dirty acid purification solution, and the filter cake is returned to the lead smelting system as lead deposits;

[0023] (3) Add the copper smelting sewage acid purification solution in step 2 into the reaction tank and heat it to 60°C with a steam tube coil, turn on the stirrer, control the stirring speed to 80r / min, and use the redox potentiometer to detect the initial oxidation of the reaction solution Reduction potential, detection value is 240 mv;

[0024] (4) Add thiosulfate and flocculant in step 3. Thiosulfate is prepared by dissolving sodium thiosulfate to make a 5%-20% solution, and flocculant is to dissolve polyacrylamide with water to form a glue-like liqu...

Embodiment 2

[0027] (1) Take 5 m of copper smelting sewage acid 3 , spent acid composition: H 2 SO 4 : 102.49 g / L, Cu: 0.280 g / L, As: 4.59 g / L, Re: 0.06695 g / L;

[0028] (2) Add the copper smelting dirty acid in step 1 into a filter press to filter and remove lead in the copper smelting dirty acid, the filtrate is the copper smelting dirty acid purification solution, and the filter cake is returned to the lead smelting system as lead deposits;

[0029] (3) Add the copper smelting sewage acid purification solution in step 2 into the reaction tank and heat it to 70°C with a steam tube coil, turn on the stirrer, control the stirring speed to 100r / min, and use the redox potentiometer to detect the initial oxidation of the reaction solution Reduction potential, detection value is 264 mv;

[0030] (4) Add thiosulfate and flocculant in step 3. Thiosulfate is prepared by dissolving sodium thiosulfate to make a 5%-20% solution, and flocculant is to dissolve polyacrylamide with water to form a gl...

Embodiment 3

[0033] (1) Take 5 m of copper smelting sewage acid 3 , spent acid composition: H 2 SO 4 : 200 g / L, Cu: 0.6 g / L, As: 5 g / L, Re: 0.08 g / L;

[0034] (2) Add the copper smelting dirty acid in step 1 into a filter press to filter and remove lead in the copper smelting dirty acid, the filtrate is the copper smelting dirty acid purification solution, and the filter cake is returned to the lead smelting system as lead deposits;

[0035] (3) Add the copper smelting sewage acid purification solution in step 2 into the reaction tank and heat it to 80°C with a steam tube coil, turn on the stirrer, control the stirring speed to 120r / min, and use the redox potentiometer to detect the initial redox potential at the same time, The detected value is 360 mv;

[0036](4) Add thiosulfate and flocculant in step 3. Thiosulfate is prepared by dissolving sodium thiosulfate to make a 5%-20% solution, and flocculant is to dissolve polyacrylamide with water to form a glue-like liquid , the proportio...

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Abstract

The invention relates to the field of metal smelting and particularly relates to a method for efficiently recovering copper and rhenium from copper smelting waste acid. The method comprises the steps: filtering copper smelting waste acid serving as a raw material for the first time, heating the filtered copper smelting waste acid in a reaction tank, and detecting the initial oxidation reduction potential by using an oxidation reduction potentiometer; then, sequentially adding a flocculant and thiosulfate for reaction, and controlling the reaction time through discontinuously detecting the oxidation reduction potential in the reaction process; and finally, carrying out secondary filtration to obtain a filter residue, i.e., a copper and rhenium precipitate. By using the method, copper and rhenium in the waste acid can be thoroughly settled, the sedimentation effect is improved under the action of the flfocculant, and thus, the recovery rates of the copper and the rhenium are increased; the recovery rate of copper is higher than 95%, the recovery rate of rhenium is higher than 98%, the sedimentation rate of arsenium is relatively low and is only about 10%, and the obtained filter cake contains 2-4% of rhenium and 10-20% of copper; and meanwhile, silver and bismuth are also recovered, and the silver content is up to 2-5%, and the bismuth content is up to 6-10%.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a method for efficiently and controllably recovering copper rhenium from copper smelting waste acid. Background technique [0002] As a rare and precious metal, rhenium exists in the form of rhenium sulfide in nature, and its content in the earth's crust is very low, mainly associated with molybdenite and a small amount of copper sulfide ore. The largest use of rhenium is as a catalyst in the petrochemical industry, and its consumption accounts for more than 60% of the total consumption. Tantalum and tungsten alloys containing rhenium are considered to be the most resistant to high temperatures, and have become an important strategy in aerospace, rockets and missiles. supplies. [0003] At present, during the smelting process of the oxygen-enriched molten pool of the silver furnace, the rhenium sulfide associated in the copper sulfide ore is oxidized into volatile rhenium oxide, an...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/44C22B3/22C22B15/00C22B30/04C22B13/00C22B61/00
CPCY02P10/20
Inventor 侯福祖张龙军梁富明张建斌
Owner BAIYIN NONFERROUS GROUP
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