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Method and device for rapidly recovering rhenium, copper and lead from copper smelting waste acid

A copper smelting and rapid technology, applied in the field of copper, rapid recovery of rhenium and lead, can solve the problems of long reaction time, large environmental pollution, equipment scale, large investment, etc., and achieves less material handling, good environmental protection, and production small investment

Active Publication Date: 2017-12-01
ZIJIN MINING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Zhang Bangqi et al. (CN 104404277 A) proposed a method for intensified leaching of rhenium in rhenium-rich slag, which uses "rhenium-rich slag and a certain amount of sulfur-fixing agent to moisten and grind - oxygen heating in a tube furnace to oxidize and roast - pressurized heating Alkali leaching” method to prepare rhenium-containing precious liquid has the defects of high energy consumption for oxidative roasting, great environmental pollution, high-pressure alkaline leaching, long reaction time and low processing capacity.
[0007] In summary, in the prior art, due to the traditional sulfide precipitation process of waste acid from copper smelting, valuable metals such as rhenium, copper, and lead sink into the arsenic filter cake together, resulting in poor enrichment effect of valuable metals, and a large amount of material to be processed in the subsequent extraction process , the process is long, the scale of equipment and investment are large. In addition, it is difficult to avoid the treatment of toxic and harmful low value-added element arsenic in the process of arsenic filter cake recycling, which is environmentally friendly and has high production costs.

Method used

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  • Method and device for rapidly recovering rhenium, copper and lead from copper smelting waste acid
  • Method and device for rapidly recovering rhenium, copper and lead from copper smelting waste acid
  • Method and device for rapidly recovering rhenium, copper and lead from copper smelting waste acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this example, the sulfuric acid concentration of copper smelting waste acid is 73.48g / L, the rhenium concentration is 17.94mg / L, the copper concentration is 33.48mg / L, and the arsenic concentration is 7.58g / L. The treatment process and effect are as follows:

[0034] (1) The waste acid from copper smelting is filtered by anti-gravity osmosis to remove the lead suspension in the waste acid and send it to the rhenium-copper precipitation tank to obtain the lead slag composition: lead 52.3%, copper 0.1%, bismuth 0.5%, arsenic 0.1%.

[0035] (2) Pump the waste acid after filtering and removing lead to the rhenium-copper precipitation tank, and use a metering pump at a rate of 1m 3 Add 20L of 20% sodium thiosulfate and 15g of sodium sulfide to the waste acid, heat it with steam to 70°C, and stir for 5 minutes; the obtained rhenium-rich slag contains 2.56% rhenium, 32.18% arsenic, and 8.34% copper; the rhenium precipitation rate is 99.8%, The arsenic precipitation rate is ...

Embodiment 2

[0039] In this example, the sulfuric acid concentration of copper smelting waste acid is 73.48g / L, the rhenium concentration is 17.94mg / L, the copper concentration is 33.48mg / L, and the arsenic concentration is 7.58g / L. The treatment process and effect are as follows:

[0040] (1) The waste acid from copper smelting is filtered by anti-gravity osmosis to remove the lead suspension in the waste acid and send it to the rhenium-copper precipitation tank to obtain the lead slag composition: lead 52.3%, copper 0.1%, bismuth 0.5%, arsenic 0.1%. (2) Pump the waste acid after filtering and removing lead to the rhenium-copper precipitation tank, and use a metering pump at a rate of 1m 3 Add 25L of 20% sodium thiosulfate and 20g of sodium sulfide to the waste acid, heat it with steam to 65°C, and stir for 15 minutes; the obtained rhenium-rich slag consists of 2.55% rhenium, 22.18% arsenic, and 8.28% copper; the rhenium precipitation rate is 99.2%, The arsenic precipitation rate is only ...

Embodiment 3

[0044] In this example, the sulfuric acid concentration of copper smelting waste acid is 73.48g / L, the rhenium concentration is 17.94mg / L, the copper concentration is 33.48mg / L, and the arsenic concentration is 7.58g / L. The treatment process and effect are as follows:

[0045] (1) The waste acid from copper smelting is filtered by anti-gravity osmosis to remove the lead suspension in the waste acid and send it to the rhenium-copper precipitation tank to obtain the lead slag composition: lead 52.3%, copper 0.1%, bismuth 0.5%, arsenic 0.1%. (2) Pump the waste acid after filtering and removing lead to the rhenium-copper precipitation tank, and use a metering pump at a rate of 1m 3 Add 10L of 20% sodium thiosulfate and 10g of sodium sulfide to the waste acid, heat it with steam to 50°C, and stir for 15 minutes; the obtained rhenium-rich slag consists of 4.06% rhenium, 30.36% arsenic, and 12.46% copper; the rhenium precipitation rate is 90.5%, The arsenic precipitation rate is only...

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Abstract

The invention discloses a method for rapidly recovering rhenium, copper and lead from copper smelting waste acid and a device for implementing the method. According to the method, the copper smelting waste acid is subjected to lead removing through filtering, lead residues with the lead content higher than 55% are obtained and taken as lead extraction raw materials, the lead extraction raw materials are subjected to targeted rhenium precipitation, rhenium-rich residues are obtained and are subjected to hot-pressing oxidizing leaching, a rhenium-rich leaching agent is obtained, the rhenium-rich leaching agent after evaporation and concentration is subjected to KCl rhenium precipitation and recrystallization, potassium perrhenate is prepared, and a liquid obtained after rhenium precipitation is vulcanized for copper deposition. The device comprises a rhenium and copper precipitant storage tank, a precipitation tank, a flocculating agent storage tank, a flocculation reaction tank, a reaction kettle, an evaporation-crystallization device, a centrifugal separator, a waste acid anti-gravity-osmosis filter, a rhenium-rich copper residue anti-gravity-osmosis filter, a filter press, a rhenium and copper precipitation tank steam heating system, a copper precipitation tank steam heating system and a slurry pump. The method and the device have the characteristics of low investment, rapid and short procedures, simple and efficient operation, and high recovery rate, and are clean and environment-friendly.

Description

technical field [0001] The invention relates to a method and a device for recovering rhenium, copper and lead from copper smelting waste acid, in particular to a method and a device for rapidly recovering rhenium, copper and lead from copper smelting waste acid. Background technique [0002] Rhenium is a rare metal element with a high melting point. It has no independent minerals in nature and is usually associated with copper, molybdenum, uranium and other minerals. During the smelting process of copper, molybdenum, uranium, etc., rhenium is mainly enriched in volatile smoke, flue gas washing liquid or leaching liquid, and this intermediate material can be used as an important raw material for rhenium extraction. [0003] Copper smelting waste acid is the washing liquid of the flue gas water medium in the copper smelting process. During the copper smelting process, most of the scattered metal rhenium in the copper concentrate volatilizes into the flue gas and then enters t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B13/00C22B61/00C22B15/00
CPCC22B7/006C22B7/02C22B13/045C22B15/0086C22B15/0091C22B61/00Y02P10/20
Inventor 吴健辉衷水平张焕然林泓富王俊娥刘招平刘长东熊家春苏秀珠林锦富邱逢杭刘晓英
Owner ZIJIN MINING GROUP
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