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Method for extracting antimony from lead anode mud

A lead anode slime and anode slime technology, applied in the metallurgical industry, can solve the problems of long production cycle, increased environmental protection pressure, low recovery rate, etc., and achieve the effects of high recovery rate, high extraction efficiency and high purity

Inactive Publication Date: 2015-08-26
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the pyrotechnic process has a large processing capacity and strong adaptability of raw materials, it will face problems such as increased pressure on environmental protection, long production cycle, high energy consumption, and low recovery rate.

Method used

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  • Method for extracting antimony from lead anode mud

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Comparison scheme
Effect test

Embodiment 1

[0015] The method for extracting valuable metal antimony from lead anode slime of the present invention comprises the following steps:

[0016] (1) Low-temperature oxidation roasting of lead anode slime: put the weighed lead anode slime in the roasting tray to ensure that the thickness of the anode slime is 20-25 mm and evenly distributed, and then put the roasting tray containing the lead anode slime into the oxidation roaster , the furnace temperature was maintained at 120°C, the roasting time was 24 hours, and the lead anode slime in the roasting furnace was rolled every 6 hours during the roasting period.

[0017] (2) Enrichment of antimony and precious metals in lead anode slime by alkaline leaching of low-carbon polyol + sodium hydroxide mixed solution: Weigh 20g of lead anode slime obtained after roasting in step (1) and pour it into a 400ml beaker, Prepare 100ml of 250g / L NaOH solution, then add 20ml of glycerin with a mass fraction of 99% into the NaOH solution, then ...

Embodiment 2

[0021] The method for extracting valuable metal antimony from lead anode slime of the present invention comprises the following steps:

[0022] (1) Low-temperature oxidation roasting of lead anode slime: put the weighed lead anode slime in the roasting tray to ensure that the thickness of the anode slime is 20-25 mm and evenly distributed, and then put the roasting tray containing the lead anode slime into the oxidation roaster , the furnace temperature was maintained at 100°C, the roasting time was 10 hours, and the lead anode slime in the roasting furnace was rolled every 3 hours during the roasting period.

[0023] (2) Enrichment of antimony and precious metals in lead anode slime by alkaline leaching of low-carbon polyol + sodium hydroxide mixed solution: Weigh 20g of lead anode slime obtained after roasting in step (1) and pour it into a 200ml beaker, Prepare 60ml of NaOH solution of 50g / L, then add 18g of xylitol with a concentration of 99% in the NaOH solution, then pou...

Embodiment 3

[0027] The method for extracting valuable metal antimony from lead anode slime of the present invention comprises the following steps:

[0028] (1) Low-temperature oxidation roasting of lead anode slime: put the weighed lead anode slime in the roasting tray to ensure that the thickness of the anode slime is 20-25 mm and evenly distributed, and then put the roasting tray containing the lead anode slime into the oxidation roaster , the furnace temperature was maintained at 100°C, the roasting time was 48 hours, and the lead anode slime in the roasting furnace was rolled every 5 hours during the roasting period.

[0029](2) Enrichment of antimony and precious metals in lead anode slime by alkaline leaching of low-carbon polyol + sodium hydroxide mixed solution: Weigh 20 g of lead anode slime obtained after roasting in step (1) and pour it into a 500ml beaker, Prepare 160ml of 300g / L NaOH solution, then add 48g of tartaric acid with a concentration of 99% into the NaOH solution, t...

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Abstract

The invention discloses a method for extracting antimony from lead anode mud. The method comprises the steps of lead anode mud waste residue treatment, anode mud efficient leaching, purification of leaching liquid, electrodeposition antimony extracting of the purification liquid and the like. During leaching, mixed liquid of alcohol-ester-base-contained low carbon polyhydric alcohol organic matter and sodium hydroxide is used; the concentration of the sodium hydroxide and the concentration of the polyhydric alcohol low carbon organic matter in the leaching liquid are 50-300 g / L respectively; the ratio of the volume (mL) of the alkaline leaching liquid to the weight (g) of the lead anode mud is 3 : 1-8 : 1; leaching temperature is 20-93 DEG C; and leaching time is 0.5-5 h. In the leaching process, at least 90% of elements such as lead, antimony, bismuth, copper and arsenium in the anode mud can enter the leaching liquid; ions such as copper, lead, bismuth and arsenium in the leaching liquid, sulfide and calcium salt form insoluble precipitate to purify the leaching liquid. The leaching liquid is used as raw materials for carrying out electrodeposition antimony extracting in an electrolytic cell; cell voltage is 1.6-3.2 V; current efficiency can reach at least 55%. The method is simple; equipment cost is low; operation is convenient; purification residues obtained in the production process and electrodeposition liquid can be further recycled.

Description

technical field [0001] The invention belongs to the field of metallurgical industry and relates to a metal recovery method, in particular to a method for efficiently extracting and recovering antimony metal from lead anode slime. Background technique [0002] Lead anode slime is the main raw material for the production of precious metals Au and Ag, and the extracts of other valuable metals such as antimony and bismuth in lead anode slime are equally important. At present, the treatment of lead anode slime is mainly to recover Au and Ag by using the noble lead furnace of the fire method system, so that the valuable metals antimony and bismuth in the lead anode slime, especially the element Part of the antimony will enter the flue with the flue gas of the noble lead furnace, while the other part will be discharged with the slag, and then the slag and soot of the noble lead furnace will be collected, and the antimony in the soot and slag will be collected and extracted by pyrot...

Claims

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Application Information

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IPC IPC(8): C22B7/00C25C1/22
CPCY02P10/20
Inventor 李彦龙何国才易超鲁兴武程亮崔海瑞李贵
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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