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Novel process for recovering metallic rhenium from copper smelting waste acid

A copper smelting and new process technology, applied in the new process field of metal rhenium recovery, can solve the problems of low recovery rate of valence metals, high investment cost, complex process, etc., and achieve large processing capacity, low investment cost, and short process flow Effect

Inactive Publication Date: 2017-12-12
铜陵有色金属集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the conventional box extraction and ion exchange technology, this process has the advantage of reducing fixed investment in equipment and civil engineering, and effectively improving the economic benefits of rhenium recovery. However, this process is more complicated and longer than the above process, and the investment cost is large. And the recovery rate of valuable metals is low

Method used

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  • Novel process for recovering metallic rhenium from copper smelting waste acid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Raw material pretreatment process: the solid particles in copper smelting waste acid are removed by one-stage plate and frame filter press and two-stage drum expansion filter to obtain copper smelting waste acid clear liquid;

[0025](2) Centrifugal extraction process: Prepare and group 7.5% N235 + 40% 2-octanol + 260# solvent oil mixed organic phase 20L as the extraction agent, through the flow meter according to the ratio O / A=1 / 10, control the entry The waste acid of the centrifugal extraction separator is 15L / h and the feed rate of the extractant is 1.5L / h. Three-stage countercurrent extraction is adopted, and the single-stage centrifugal extraction time is 4s to obtain a rhenium-containing loaded organic phase and an oil-containing raffinate, containing The rhenium-loaded organic phase is sent to the centrifugal washing process, and the oily raffinate is sent to the sewage acid treatment process of the copper smelter after degreasing, and the organic phase is ret...

Embodiment 2

[0032] (1) Raw material pretreatment process: the copper smelting waste acid is vacuum filtered with a filter cloth of 2000 mesh to remove solid particles in the copper smelting waste acid to obtain a copper smelting waste acid clear liquid;

[0033] (2) Centrifugal extraction process: prepare a mixed organic phase of 7.5% N235 + 40% 2-octanol + 260# solvent oil 2m 3 As an extractant, the processing capacity of waste acid from copper smelting is 600L / h, and the amount of waste acid from copper smelting and extractant entering the centrifuge extraction separator is controlled by a flow meter according to the ratio O / A=1 / 10, using 3 Stage countercurrent extraction, single-stage centrifugal extraction time is 4s, to obtain rhenium-containing organic phase and oil-containing raffinate, rhenium-containing organic phase is sent to centrifugal washing process, and oil-containing raffinate is sent to copper smelter for sewage acid treatment after degreasing process, the organic phase ...

Embodiment 3

[0041] (1) Raw material pretreatment process: the solid particles in copper smelting waste acid are removed by one-stage plate and frame filter press and two-stage drum expansion filter to obtain copper smelting waste acid clear liquid;

[0042] (2) Centrifugal extraction process: prepare a mixed organic phase of 7.5% N235 + 40% 2-octanol + 260# solvent oil 2m 3 As an extraction agent, the processing capacity of waste acid from copper smelting is 800L / h, and the amount of waste acid from copper smelting and extraction agent entering the centrifugal extraction separator is controlled by a flow meter according to O / A=1 / 10, using 3 Stage countercurrent extraction, single-stage centrifugal extraction time is 4s, get rhenium-containing organic phase and oil-containing raffinate, rhenium-containing organic phase is sent to centrifugal washing process, oil-containing raffinate is sent to raffinate oil separation tank to remove organic phase Finally, it is sent to the copper smelter s...

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Abstract

The invention relates to a novel process for recovering metallic rhenium from copper smelting waste acid. The novel process comprises the following steps: through pretreatment, centrifugal extraction, centrifugal washing, centrifugal reverse extraction, concentration, freezing crystallization and recrystallization, so that valuable metallic rhenium in the copper smelting waste acid is recovered, and a high purity ammonium rhenate product is obtained; and meanwhile, the on-line and automatic PLC control is realized in the overall technological process design. With the adoption of the novel process for recovering metallic rhenium from the copper smelting waste acid provided by the technical scheme of the invention, the following benefits are achieved: 1, the technological process is short, the operation is simple and convenient; 2, the equipment floor area is small, the investment cost is low, and the cost can be controlled at RMB1450 Yuan / kg of ammonium rhenate; 3, the degree of automation is high, and the on-line monitoring and controlling are realized; 4, compared with the conventional box-type extraction process, the novel process has the advantages as follows: the extraction efficiency is high, the organic phase retention volume is small, the extraction balance in all time periods is achieved, the real-time start / stop is realized, the treatment capacity is high, the emulsification is eliminated, the on-line cleaning is realized, the recovery rate of valuable metallic rhenium is high, and the separation effect of valuable metallic rhenium from metallic impurities is good; and 5, the sewage quantity is small, the secondary pollution is avoided, and the environmental friendliness is achieved.

Description

technical field [0001] The invention relates to the field of hydrometallurgy, in particular to a new process for recovering metal rhenium from copper smelting waste acid. Background technique [0002] Rhenium is a rare metal that is very scarce and constantly increasing in value. Its content in the earth's crust is only greater than that of protactite and radium. At present, it is widely used in modern industry, mainly used as catalyst in petroleum industry and automobile industry, petroleum reforming catalyst, rhenium alloy in electronics industry and aerospace industry, etc. Rhenium has an irreplaceable role in other metals in modern industry. Rhenium is mostly used as CuReS in copper raw materials 4 and ReS 2 It exists in the form, and is completely oxidized to Re during the smelting process of copper matte 2 o 7 , SO 2 When the concentration is high, a part of Re 2 o 7 Reverted to ReO 3 、ReO 2 . Under the smelting atmosphere, almost all rhenium oxides enter the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B61/00
CPCC22B7/006C22B61/00Y02P10/20
Inventor 俞鹰申其新方支灵钱俊杰
Owner 铜陵有色金属集团股份有限公司
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