Process of recovering copper smelting waste acid and white smoke dusts

A white smoke, copper smelting technology, applied in the field of metallurgy, can solve the problems of low comprehensive utilization level of valuable elements, poor labor conditions, environmental pollution, etc., and achieve the effects of good wastewater treatment effect, low production cost, and high comprehensive recovery rate.

Inactive Publication Date: 2015-05-06
ZIJIN MINING GROUP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the traditional pyrotechnic process has shortcomings such as serious environmental pollution, poor working conditions, and low level of comprehensive utilization of valuable elements. The treatment process of white soot is gradually developing towards wet method, combined wet method and pyrotechnic met...

Method used

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  • Process of recovering copper smelting waste acid and white smoke dusts

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Effect test

Embodiment 1

[0024] A copper smelter produces 800m per day 3 Waste acid (sulfuric acid 150g / L, rhenium 10mg / L, copper 1.5g / L, arsenic 2g / L), produces 4500 tons of white smoke dust (Cu 5%, Bi 8%, Pb 30%, Zn 5%, Cd 3 %, As 5%). Add a small amount of oxidant to the waste acid to adjust the redox potential of the waste acid to 650mV; then use anion resin to adsorb rhenium, the flow rate of the waste acid is 5BV / h, after the adsorption is saturated, use 2mol / L ammonium thiocyanate solution to desorb, the flow rate of the desorption liquid is 2BV / h , the amount of desorption liquid is 5BV, after desorption, the liquid is concentrated and crystallized to obtain ammonium rhenate product. The white soot is subjected to two-stage countercurrent acid leaching, and the concentration of sulfuric acid is adjusted by using the waste acid after adsorbing rhenium. Chloride salt leaching of bismuth is carried out on white fume acid leaching residue, the main component of the leaching residue is lead sulfa...

Embodiment 2

[0026] A copper smelter produces 800m per day 3 Waste acid (sulfuric acid 150g / L, rhenium 10mg / L, copper 1.5g / L, arsenic 2g / L), produces 4500 tons of white smoke dust (Cu 5%, Bi 8%, Pb 30%, Zn 5%, Cd 3 %, As 5%). Add a small amount of oxidant to the waste acid to adjust the redox potential of the waste acid to 650mV; then use anion resin to adsorb rhenium, the flow rate of the waste acid is 8BV / h, after the adsorption is saturated, use 2mol / L ammonium thiocyanate solution to desorb, the flow rate of the desorption liquid is 3BV / h , the amount of desorption liquid is 5BV, after desorption, the liquid is concentrated and crystallized to obtain ammonium rhenate product. The white soot is subjected to two-stage countercurrent acid leaching, and the concentration of sulfuric acid is adjusted by using the waste acid after adsorbing rhenium. Chloride salt leaching of bismuth is carried out on white fume acid leaching residue, the main component of the leaching residue is lead sulfa...

Embodiment 3

[0028] A copper smelter produces 800m per day 3Waste acid (sulfuric acid 150g / L, rhenium 10mg / L, copper 1.5g / L, arsenic 2g / L), produces 4500 tons of white smoke dust (Cu 5%, Bi 8%, Pb 30%, Zn 5%, Cd 3 %, As 5%). Add a small amount of oxidant to the waste acid to adjust the redox potential of the waste acid to 650mV; then use the anion resin to adsorb rhenium, the flow rate of the waste acid is 3BV / h, after the adsorption is saturated, use 2mol / L ammonium thiocyanate solution to desorb, the flow rate of the desorption liquid is 1BV / h , the amount of desorption liquid is 5BV, after desorption, the liquid is concentrated and crystallized to obtain ammonium rhenate product. The white soot is subjected to two-stage countercurrent acid leaching, and the concentration of sulfuric acid is adjusted by using the waste acid after adsorbing rhenium. Chloride salt leaching of bismuth is carried out on white fume acid leaching residue, the main component of the leaching residue is lead su...

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Abstract

The invention provides a process of recovering copper smelting waste acid and white smoke dusts. The process comprises the following steps: removing suspended particulate matters in the waste acid, regulating the acidity and the redox potential of the liquid, and enabling ions including molybdenum ions in the liquid to exist in a high positive ion mode; then selectively adsorbing rhenium by utilizing ion exchange resin, after adsorption is saturated, carrying out desorption to obtain a rhenate liquid, and carrying out concentration and crystallization to obtain rhenate; using the waste acid after adsorbing the rhenium for leaching the white smoke dusts; treating the white smoke dusts by adopting two segments of countercurrent acid leaching-chloride leaching process, recovering valuable metals including copper, zinc and cadmium of an acid leaching liquid, carrying out harmless treatment on harmful elements including arsenic by virtue of a molysite method, recovering valuable metals including bismuth of a chloride leaching liquid, and selling lead sulfate, serving as a main component of chloride leaching residues, to a lead smelting plant. According to the process provided by the invention, the rhenium in the waste acid can be efficiently separated and recovered, the leaching white smoke dusts of the waste acid can be fully utilized, and the waste acid and white smoke dust leaching liquids can be comprehensively treated by utilizing a set of copper recovering and arsenic harmless treatment system, so that the process matching ability is good, the comprehensive recovery rate of the valuable metals is high, the waste water treatment effect is good, the investment is little, the production cost is low, and the economical benefit is good.

Description

1. Technical field [0001] The invention relates to the metallurgical industry, in particular to a process for recovering valuable metals during copper smelting, in particular to a process for comprehensively recovering copper smelting waste acid and white smoke. 2. Background technology [0002] Copper concentrate usually contains a certain amount of valuable metals such as rhenium, bismuth, lead, and zinc. During the copper smelting process, rhenium, bismuth and other metals are volatilized and enter the flue gas. Rhenium is mainly enriched in the waste acid, and bismuth, lead, and zinc are mainly enriched in the white smoke. Due to the high acidity of the waste acid, the composition Complicated, the content of harmful impurities such as arsenic is high, and the content of valuable metal ions such as rhenium (about 10 mg / L) and bismuth is relatively low, resulting in difficulties in the recovery of valuable metals. At present, the techniques for extracting rhenium from cop...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B15/00C22B19/30C22B17/00C22B13/00C22B61/00C22B30/06
CPCY02P10/20
Inventor 蓝碧波王俊娥张焕然伍赠玲衷水平彭钦华王春邹来昌
Owner ZIJIN MINING GROUP
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