Method for washing lead anode mud and recovering lead in lead anode mud

A lead anode slime and pickling technology, which is applied in the field of washing lead anode slime and recovering lead in lead anode slime, can solve problems such as non-leaching, lead recovery process research, etc., and achieve effective recovery, short purification time, and rapid treatment.

Active Publication Date: 2017-07-04
ZHUZHOU SMELTER GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, many researchers have done more research on the treatment of lead anode slime, most of which focus on the comprehensive recovery process of lead anode slime, including chlorination leaching method, controlled current chlorination leaching method, controlled potential oxidation method, and pressure leaching method. etc., but there is relatively little research on the recovery process of lead in lead anode slime. In Chinese patent CN101713028A, the electrolytic lead-bismuth alloy anode slime is soaked in purified water and dilute fluorosilicic acid solution, which cannot effectively treat lead anode slime. effective leaching of water-insoluble lead in

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  • Method for washing lead anode mud and recovering lead in lead anode mud

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Embodiment 1

[0035] Such as figure 1 As shown, according to the method of washing lead anode slime of the present invention and reclaiming lead in lead anode slime, the lead anode slime with a weight percentage of lead of 30% is a raw material, mainly comprising the following steps:

[0036] (1) pressure filtration for the first time, after pressure filtration, the massfraction of the water in the control lead anode slime is 29%, will send the filtrate of gained after pressure filtration for the first time to electrolysis process and carry out direct recovery, will first time The lead anode slime obtained after press filtration contains 30% lead, and is sent to the stirring pickling tank for subsequent treatment;

[0037] (2) Agitate and pickle, add the fluosilicate solution with a concentration of 235g / L into the pickling tank, and the liquid-solid ratio of the mixture of the lead anode slime and the fluosilicate solution obtained after the first pressure filtration is 18:1 , stirring an...

Embodiment 2

[0046] Such as figure 1 As shown, according to the method for washing lead anode slime of the present invention and reclaiming lead in lead anode slime, the lead anode slime with a weight percentage of lead of 22.5% is a raw material, mainly comprising the following steps:

[0047] (1) pressure filtration for the first time, after pressure filtration, the massfraction of the water in the control lead anode slime is 27%, will send the filtrate of gained after pressure filtration for the first time to the electrolysis process and directly reclaim, the first time The lead anode slime obtained after press filtration contains 22.5% lead, and is sent to the stirring pickling tank for subsequent treatment;

[0048] (2) Add the fluorosilicic acid solution with a concentration of 145g / L into the pickling tank, and the liquid-solid ratio of the mixture of the lead anode slime and the fluorosilicic acid solution obtained after the first pressure filtration is 12:1, and pickling with stir...

Embodiment 3

[0057] Such as figure 1 As shown, according to the method for washing lead anode slime of the present invention and reclaiming lead in lead anode slime, the lead anode slime with a weight percentage of lead of 15% is a raw material, mainly comprising the following steps:

[0058] (1) pressure filtration for the first time, after pressure filtration, the massfraction of the water in the control lead anode slime is 25%, will send the filtrate of gained after pressure filtration for the first time to electrolysis process and carry out direct recovery, will first time The lead anode slime obtained after press filtration contains 15% lead, and is sent to the stirring pickling tank for subsequent treatment;

[0059] (2) Add the fluorosilicic acid solution with a concentration of 50g / L into the pickling tank, and the liquid-solid ratio of the mixture of the lead anode slime and the fluorosilicic acid solution obtained after the first pressure filtration is 6:1, and pickling with stir...

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Abstract

The invention discloses a method for washing lead anode mud and recovering lead in the lead anode mud. The method mainly comprises the following steps of first-time filter pressing, stirring acid pickling, second-time filter pressing, first-time purification, second-time purification and the like. The method is short in technological process, low in investment, easy to operate and small in environmental pollution. Lead sulfate obtained through the method is high in grade, a high-purity lead sulfate chemical product can be obtained through simple follow-up treatment, and effective recovery of the lead in the lead anode mud is achieved; and the grade of valuable metal in the anode mud obtained after acid pickling is high, and good raw materials are provided for recycling smelting of the valuable metal subsequently. According to the method, the circulated acid pickling method is adopted, lead oxide is used for deep purification, circulated use of a pickling solution can be achieved, influences of lead electrolysis volume balance are avoided, metal impurities are avoided, and finally the high-grade lead sulfate recovering is achieved.

Description

technical field [0001] The invention relates to the technical field of wet treatment of lead anode slime, in particular to a method for washing lead anode slime and recovering lead in the lead anode slime. Background technique [0002] Lead anode slime is the product of crude lead electrolytic refining. The lead anode slime is rich in valuable metals such as precious metals and scattered metals. These metals occupy a very important position in the national economy. Extracting these metals from lead anode slime can obtain Great economic benefits. Although due to the difference in lead smelting process and lead smelting raw materials, the composition of lead anode slime produced is quite different, but generally the main components of lead anode slime are within the following weight percentage range: gold 0.03-0.5%, silver 2- 8%, antimony 15-40%, bismuth 8-20%, tellurium 0.2-2%, lead 10-40%. However, with the decline in the profit margin of the lead smelting industry, there ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B13/00
CPCC22B7/007C22B13/045Y02P10/20
Inventor 王文军张记东林文军伏东才戴慧敏柳承辉谌可颂周萍
Owner ZHUZHOU SMELTER GRP
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