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Clean and efficient method for recycling arsenic, copper, lead, antimony and silver from copper-containing smelting slag

A technology for copper smelting slag and copper smelting, which is used in the field of silver, clean and efficient recovery of arsenic, copper, antimony and lead, can solve the problem of high energy consumption and cost of three wastes discharge and treatment, complicated process flow of iron salt method, and easy introduction of other impurities, etc. It can eliminate the arsenic pollution problem, realize the utilization of resources, and achieve the effect of fast reaction process.

Inactive Publication Date: 2018-11-06
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main patents in related fields include: a clean and efficient process for arsenic matte treatment (201610446668.8), a process for recycling copper and arsenic from arsenic-containing polluted acid (201410701797.8), a process for removing arsenic matte by oxygen pressure alkaline leaching A method for removing and recovering arsenic (201310191630.7), a method for slagging and removing arsenic in copper smelting process (201610683819.1), etc. Few studies have been done on issues such as serious pollution
In the process of leaching copper, arsenic enters the leaching solution in the form of ions. If the leaching solution is not treated to remove arsenic, the production of copper sulfate from a high-arsenic mother solution will seriously affect the quality of its products.
Among the currently available arsenic removal methods, the lime method has the disadvantage of high loss of copper resulting in low leaching rate; while the iron salt method has a complicated process and is easy to introduce other impurities; the sodium sulfide method has difficulty in solid-liquid separation after leaching, resulting in a large amount of The Problem of Difficult Wastewater
In addition, in the existing copper-containing slag treatment methods, the arsenic is generally reacted with iron compounds or iron ore to form iron arsenate for fixed storage, which not only requires the addition of iron powder or iron ore, resulting in high processing costs, but also is difficult to remove Arsenic forms resources, and also forms waste liquid, waste gas and waste residues containing arsenic and heavy metals such as lead and copper, which not only results in high energy consumption and cost for the treatment of three wastes, but also pollutes the environment, and the metal recovery rate is low

Method used

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  • Clean and efficient method for recycling arsenic, copper, lead, antimony and silver from copper-containing smelting slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Crushing the copper-containing smelting slag, then finely grinding the crushed copper-containing smelting slag to a fineness of -0.074 mm and accounting for more than 90%, passing through a 200-mesh sieve to obtain copper-containing slag powder.

[0035] 2. Put the copper-containing slag powder and the alkaline solution of sodium hydroxide with a concentration of 30g / L into the autoclave at a liquid-to-solid ratio of 5:1, and inject oxygen with a pressure of 0.8MP into the autoclave. , Stirring speed is 400rpm, pH is 7 under the conditions of pressurized oxidation alkali leaching reaction for 1.5h, after the reaction is completed, the slurry is filtered out of the kettle to obtain leaching residue containing copper, lead, antimony and silver and arsenic-containing leaching solution.

[0036] 3. Pass the arsenic-containing leaching solution with arsenic ion concentration of 35g / L through the tank with a pressure of 3.0V and a current density of 150A / m 2Alkaline system...

Embodiment 2

[0040] 1. Crushing the copper-containing smelting slag, then finely grinding the crushed copper-containing smelting slag to a fineness of -0.074mm and accounting for more than 90%, passing through a 200-mesh sieve to obtain copper-containing slag powder.

[0041] 2. Put copper-containing slag powder and sodium hydroxide alkaline solution with a concentration of 50g / L into the autoclave at a liquid-to-solid ratio of 4:1, and inject oxygen with a pressure of 0.6MP into the autoclave. , Stirring speed is 400rpm, pH is 8 under the conditions of pressurized oxidation alkali leaching reaction for 1.8h, after the reaction is completed, the slurry is filtered out of the kettle to obtain leaching residue containing copper, lead, antimony and silver and arsenic-containing leaching solution.

[0042] 3. Pass the arsenic-containing leaching solution with arsenic ion concentration of 32g / L through the tank with a pressure of 2.8V and a current density of 200A / m 2 Alkaline system swirling e...

Embodiment 3

[0046] 1. Crushing the copper-containing smelting slag, then finely grinding the crushed copper-containing smelting slag to a fineness of -0.074 mm and accounting for more than 90%, passing through a 200-mesh sieve to obtain copper-containing slag powder.

[0047] 2. Put the copper-containing slag powder and the sodium hydroxide alkaline solution with a concentration of 150g / L into the autoclave at a liquid-solid ratio of 6:1. , Stirring speed is 300rpm, PH is 10 under the conditions of pressurized oxidation alkali leaching reaction for 1.0h, after the reaction is completed, the slurry is filtered out of the kettle to obtain leaching residue containing copper, lead, antimony and silver and arsenic-containing leaching solution.

[0048] 3. Pass the arsenic-containing leaching solution with arsenic ion concentration of 35g / L through the tank with a pressure of 3.1V and a current density of 220A / m 2 Alkaline system swirling electrowinning, so that metal arsenic ions are deposited...

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Abstract

The invention discloses a clean and efficient method for recycling arsenic, copper, lead, antimony and silver from copper-containing smelting slag. The method comprises the steps of conducting crushing and fine grinding on the copper-containing smelting slag, so that copper slag powder is obtained; adding the copper slag powder and a sodium hydroxide solution into an autoclave, introducing an oxidizing medium for an oxygen pressure alkaline leaching reaction, and then delivering the materials for filtration, so that leaching residues containing the copper, the lead, the antimony and the silverand arsenic-containing leachate are obtained; conducting rotational flow arsenic electrodeposition on the arsenic-containing leachate through an alkalic system, so that a metallic arsenic electrolysis product is obtained at a cathode, and after alkali replenishment, electrodeposition waste liquor I serves as replenishment fluid for the oxygen pressure alkaline leaching reaction; adding the leaching residues and sulfuric acid into the autoclave, introducing the oxidizing medium for an oxidation acid leaching reaction, then delivering the materials for filtration, so that leaching residues containing the lead, the antimony and the silver and copper-containing leachate are obtained, and returning the leaching residues for smelting to recycle the lead, the antimony and the silver; and conducting rotational flow copper electrodeposition on the copper-containing leachate through a sulfuric acid system, so that a refined copper product is obtained at the cathode, and electrodeposition wasteliquor II serves as replenishment fluid for the oxidation acid leaching reaction. The clean and efficient method has the beneficial effects of being good in arsenic removal effect, high in metal recycling rate, low in energy consumption, clean and free of waste gas, waste gas and industrial residues.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for cleanly and efficiently recovering arsenic, copper, lead, antimony and silver from copper-containing smelting slag materials with good arsenic removal effect, high metal recovery rate, low energy consumption, cleanness and no three wastes method. Background technique [0002] The annual output of lead-zinc smelting copper-containing slag in my country reaches more than 50 million tons, and Yunnan Province has more than 10 million tons. These copper slags contain copper grades of 10-40%, lead 3-80%, zinc 3-20%, bismuth 1~ 30% and 0.9% silver, with high potential value, it is a mineral resource with high value for comprehensive utilization and recovery. Lead-zinc smelting copper-containing slag is the waste slag produced during the lead-zinc smelting process. This type of slag includes converter slag, sub-matte, copper scum, copper-cadmium slag, lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B30/04C22B15/00C22B13/02C22B30/02C22B11/02C25C1/12C25C1/22
CPCC22B7/007C22B7/008C22B7/04C22B11/023C22B13/025C22B15/0071C22B30/02C22B30/04C25C1/12C25C1/22Y02P10/20
Inventor 周娴胥福顺包崇军香钦华杨筱筱周林陈越尚青亮张玮陈劲戈张辉孙彦华曹瑞珂刁薇之闫森
Owner KUNMING METALLURGY INST