A method for recovering valuable metals from complex high-arsenic copper smelting dust

A valuable metal and copper smelting technology, applied in the field of metallurgy, to achieve the effect of reasonable technical arrangement and easy utilization

Active Publication Date: 2019-04-23
云南锡业研究院有限公司研究设计院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for recovering valuable metals from complex high-arsenic copper smelting fumes. bloat problem

Method used

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  • A method for recovering valuable metals from complex high-arsenic copper smelting dust

Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0015] Example 1: 1.2 tons of high-arsenic copper smelting dust (containing: 14.62% arsenic, 17.6% lead, 3.62% bismuth, 3.18% copper, 1450g / t indium, 4.27% tin) was put into a blast furnace for reduction smelting, and the smelting temperature was 1100~1300℃, the reaction time is 8 hours, the obtained soot contains 3280g / t indium and 38% arsenic; the obtained metal lead contains 89% lead, 2.1% tin, and 2.8% bismuth; the slag contains 3.68% copper.

[0016] The dust obtained is dearsenized by rotary kiln and reverberatory furnace. The temperature of rotary kiln is 800-900°C, the temperature of reverberatory furnace is 800-900°C, the purity of arsenic trioxide is 93.87%, and the arsenic content in the final calcined sand is 0.95%, the indium content is 4800g / t, the calcine is leached with 180g / L sulfuric acid, and replaced with zinc powder to obtain sponge indium.

[0017] The metal lead obtained is made of a smelting pot, the temperature for removing impurities from the metal le...

Embodiment ２

[0019] Example 2: Put 1.2 tons of high-arsenic copper smelting dust (containing: 17.45% arsenic, 14.6% lead, 4.12% bismuth, 3.52% copper, 1150g / t indium, 3.45% tin) into the blast furnace for reduction smelting, and the smelting temperature is 1150℃, the reaction time is 8 hours, the obtained smoke contains 3200g / t indium and 37% arsenic; the obtained metal lead contains 93% lead, 2.9% tin, and 2.6% bismuth; the slag contains 3.5% copper.

[0020] The obtained soot is dearsenized by rotary kiln and reverberatory furnace. The temperature of rotary kiln and reverberatory furnace is 800-900°C. The purity of arsenic trioxide is 93.76%. The arsenic content in the final calcined sand is 1.2%, the indium content is 4821g / t, the calcine is leached with 180g / L sulfuric acid, and replaced with zinc powder to obtain sponge indium.

[0021] The metal lead obtained is made of a smelting pot, the temperature for removing impurities from the metal lead is 800-1000° C., and the addition amoun...

Embodiment ３

[0023] Example 3: Example 1: Put 1.2 tons of high-arsenic copper smelting dust (containing: 19.63% arsenic, 18.82% lead, 4.82% bismuth, 3.93% copper, 1450g / t indium, 5.77% tin) into the blast furnace for reduction smelting , the smelting temperature is 1300°C, and the reaction time is 8 hours. The obtained smoke contains 3023g / t indium and 36% arsenic; the obtained metal lead contains 87.2% lead, 2.3% tin, and 2.5% bismuth; the slag contains 3.21% copper .

[0024] The obtained soot is dearsenized by rotary kiln and reverberatory furnace. The temperature of rotary kiln is 800-900°C, the temperature of reverberatory furnace is 800-900°C, the purity of arsenic trioxide is 93.57%, and the arsenic content in the final calcined sand is 1.5%, the indium content is 4802g / t, the calcine is leached with 180g / L sulfuric acid, and replaced with zinc powder to obtain sponge indium.

[0025] The metal lead obtained is made of a smelting pot, the temperature for removing impurities from th...

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Abstract

The invention discloses a method for recovering valuable metals from complex high-arsenic-and-copper smelting flue dust, belongs to the technical field of metallurgy, and concretely relates to a method for recovering valuable metals from high-arsenic-and-copper smelting flue dust containing complex components. The method comprises the following steps: 1, the high-arsenic-and-copper smelting flue dust is reduced and molten at a high temperature in order to make lead, bismuth and tin be reduced and enter metallic lead, arsenic and indium enter the flue dust and copper enter slag; 2, the obtained flue dust undergoes arsenic removal treatment in a rotary kiln, obtained calcine undergoes further arsenic removal in a reverberatory furnace to obtain an arsenic trioxide product, and indium enriched in the calcine is leached by sulfuric acid and is recovered; 3, the metallic lead is processed in a smelting furnace in the presence of sodium carbonate and sodium chloride to obtain a qualified product metallic lead, and tin and bismuth contained in slag are recovered in a tin smelting raw material form; and 4, copper contained in the slag in a matte form is recovered as a copper smelting raw material. The method has the advantages of no generation of dangerous waste arsenic calcium slag, no generation of a hydrogen arsenide gas in the whole treatment process, no water system expansion problem, and good utilization of the valuable metals.

Description

technical field [0001] The method belongs to the technical field of metallurgy, and specifically relates to a method for recovering valuable metals from complex high-arsenic copper smelting flue dust. Background technique [0002] The existing main method for treating high-arsenic copper smelting dust (see Chinese patent document 201210062957.X for details) is: use wet leaching method to leach high-arsenic copper dust that has been slightly roasted, and dissolve elements such as copper, arsenic, zinc, and indium into the solution , lead bismuth tin into the slag. Arsenic in the solution is removed in the form of arsenic-calcium slag by neutralization and precipitation, copper is recovered in the form of sponge copper by replacement, zinc is recovered in the form of zinc sulfate heptahydrate by concentration, lead, bismuth, tin Enter the slag as raw material for lead smelting to recover lead, tin and bismuth. The main problems of this method are: a large amount of hazardous...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B13/02C22B15/00C22B25/06C22B30/06C22B30/04C22B58/00
CPCY02P10/20
Inventor 李学鹏尹久发陈学元卢兴伟张梅英李畅蔡群辉
Owner 云南锡业研究院有限公司研究设计院
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