Method for recovering valuable metals from complex high-arsenic-and-copper smelting flue dust

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

Active Publication Date: 2017-01-04
云南锡业研究院有限公司研究设计院
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method fo

Method used

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  • Method for recovering valuable metals from complex high-arsenic-and-copper smelting flue dust

Examples

Experimental program
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Effect test

Example

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

[0016] The obtained smoke dust is treated by rotary kiln and reverberatory furnace. The temperature of rotary kiln treatment is 800~900℃, the temperature of reverberatory furnace treatment is 800~900℃, the purity of arsenic trioxide is 93.87%, and the arsenic content in the final calcine 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 obtained metallic lead is used in a smelting pot, the temperature of metallic lead removal is...

Example

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

[0020] The obtained smoke and dust are treated by rotary kiln and reverberatory furnace for arsenic removal. The temperature of rotary kiln treatment is 800-900℃, the temperature of reverberatory furnace treatment is 800-900℃, the purity of arsenic trioxide is 93.76%, and the final arsenic content in the calcine 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 obtained metallic lead is used in a smelting p...

Example

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

[0024] The obtained smoke dust is treated by rotary kiln and reverberatory furnace for arsenic removal. The temperature of rotary kiln treatment is 800~900℃, the temperature of reverberatory furnace treatment is 800~900℃, the purity of arsenic trioxide is 93.57%, and the arsenic content in the final calcine 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 obtained metallic lead is used in a smelting pot, the temper...

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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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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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