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

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...

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Problems solved by technology

[0006] Zhang Bangqi et al. (CN104404277A) proposed a method of intensified leaching of rhenium in rhenium-rich slag, which uses "rhenium-rich slag and a certain amount of sulfur-fixing agent for grinding - oxygen heating in a tube furnace for oxidation roasting - pressurized heating alkali leaching "Preparation of rhenium-containing precious liquid has the defects of high energy consumption for oxidative roasting, large environmental pollution, large consumption of high-pressure alkaline leaching, long reaction time and small 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.

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