Treatment method for polymetallic alloy formed by arsenic-lead-antimony and noble metal

A processing method and precious metal technology, applied in the direction of improving process efficiency, can solve the problem of difficulty in directly obtaining qualified antimony white product precious metal alloy, etc., and achieve the effect of reducing the amount of precious metal volatilization loss

Inactive Publication Date: 2013-07-10
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alloys produced in the above-mentioned different places are composed of elements such as Sb, Pb, As, Au and Ag to varying degrees, among which Sb and noble metals are the main value elements, while Pb and As are the main impurity elements. It is difficult to directly Obtain qualified antimony white products as well as precious metal alloys suitable for further processing

Method used

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  • Treatment method for polymetallic alloy formed by arsenic-lead-antimony and noble metal
  • Treatment method for polymetallic alloy formed by arsenic-lead-antimony and noble metal
  • Treatment method for polymetallic alloy formed by arsenic-lead-antimony and noble metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Take 5000kg of lead anode slime whose composition is shown below to reduce the obtained polymetallic alloy.

[0048] Table 1 Raw material composition / %

[0049]

[0050] Note: *--g / t

[0051] Under the condition of 600~650℃, add NaOH according to 1.2 times of the theoretical amount, and blow air into it for 1.5~2h to oxidize, and the arsenic can be removed to 0.03%, which is used for the next step of antimony white conversion. Under the condition of 800~850℃, in figure 2 The antimony white is blown in the road shown, and the antimony grade at the end of the blowing is controlled to be 10%, and the quality of the obtained antimony white is shown in Table 2.

[0052] Table 2 The mass of antimony white in comprehensive condition test / %

[0053]

[0054] The product quality reaches the Sb in GB / T4062-1998 2 o 3 99.8 requirements.

[0055] The residual alloy composition obtained after blowing is shown in Table 3.

[0056] Table 3 Composition of rich and noble le...

Embodiment 2

[0065] Take 30 tons of the alloy whose composition is shown in Table 5, under the condition of 600-650°C, add NaOH according to twice the theoretical amount, and oxidize it by blowing air for 6 hours, and remove the arsenic to 0.04%, which will be used in the next step of antimony white casting .

[0066] Table 5 Raw material composition / %

[0067]

[0068] Note: *--g / t

[0069] At 880°C, at figure 2 The antimony white is blown in the road shown, and the antimony grade at the end of the blowing is controlled to be 9%, and the quality of the obtained antimony white is shown in Table 6.

[0070] Table 6 Mass / % of antimony white in comprehensive condition test

[0071]

[0072] The product quality reaches the Sb in GB / T4062-1998 2 o 3 99.8 requirements.

[0073] The residual alloy composition obtained after blowing is shown in Table 7.

[0074] Table 7 Composition of rich and noble lead obtained from blowing / %

[0075]

[0076] Note: *--g / t

[0077] Put the abov...

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Abstract

The invention discloses a treatment method for a polymetallic alloy formed by arsenic-lead-antimony and noble metal. In order that the polymetallic alloy formed by arsenic-lead-antimony and noble metal is directly prepared to meet the international standard Sb20399.8, the noble metal is enriched in the noble metal alloy. The treatment method comprises the following steps of: carrying out alkalification and deep dearsenification treatment on the polymetallic alloy formed by arsenic-lead-antimony and noble metal; then converting antimony white at low temperature in a special converting furnace; and finally blasting and highly oxidizing lead slagging to obtain the noble metal alloy. According to the treatment method, the antimony directly satisfies the output requirement of antimony white; the energy consumption is low, and the direct yield rate of the noble metal is improved to more than 98%; and the converting and slagging time of residual alloy after removal of arsenic and antimony is shortened within 30 hours, which is reduced by more than 50% compared with the conventional process.

Description

technical field [0001] The invention relates to a treatment method for a multi-metal alloy formed by containing arsenic, lead, antimony and precious metals, in particular a kind of rough antimony obtained by reducing a multi-metal alloy obtained by reducing anode slime, arsenic-antimony soot or antimony sulfide volatilization and smelting antimony-oxygen powder Treatment methods for noble metal alloys containing arsenic, lead, and antimony. Background technique [0002] Anode slime can remove metals such as copper and bismuth through wet treatment, and then reduce it in a converter or reverberatory furnace to obtain a multi-metal alloy composed of arsenic, lead, antimony and precious metals; a traditional anode slime smelting process will produce a rich Soot containing arsenic and antimony, this soot also contains a certain amount of lead and precious metals, mixed with coal or coke, it can be reduced in reverberatory furnace, converter or bottom blowing furnace to obtain ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00C22B30/02
CPCY02P10/20
Inventor 刘维刘锐覃文庆张忠国蔡练兵邝江华刘三军邬锋潮王毅
Owner CENT SOUTH UNIV
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