Method for removing arsenic, antimony and copper by refining raw lead

A crude lead refining and removal technology, applied in the field of crude lead refining to remove arsenic, antimony and copper, can solve the problems of long operation time, poor effect of removing arsenic, antimony and copper, environmental pollution, etc., achieve short operation time, reduce lead volatilization, and the effect of improving the working environment

Inactive Publication Date: 2011-04-13
ZHUZHOU SMELTER GRP
View PDF3 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods all have problems such as poor effect of removing arsenic, antimony and copper, long operation time, and serious environmental pollution.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First heat the crude lead in an iron open lead melting pot by electric heating, heat and melt and raise the temperature to 450°C, then add Al lumps to the molten crude lead melt at a ratio of 1:1, manually stir for 10 minutes, the Al lumps and crude lead melt Arsenic-antimony-copper in lead melt forms AsAl, SbAl, and CuAl 2 Wait until the compound floats to the surface of the lead melt to become scum, stop stirring, scoop up the scum on the surface of the lead melt, and cast ingots. Sampling test results: w As : 0.40%, w Sb : 0.80%,. w Cu : 0.06%.

Embodiment 2

[0030] First heat the crude lead in an iron open lead melting pot electrically, heat and melt and raise the temperature to 550°C, then add Al powder to the molten crude lead melt in a ratio of 1:2, stir mechanically for 25 minutes, and Al powder and coarse lead melt Arsenic-antimony-copper in lead melt forms AsAl, SbAl, and CuAl 2 Wait until the compound floats to the surface of the lead melt to become scum, stop stirring, scoop up the scum on the surface of the lead melt, and cast ingots. Sampling test results: w As : 0.38%, w Sb : 0.75%,. w Cu : 0.05%.

Embodiment 3

[0032] First heat the crude lead in an iron open lead melting pot electrically, heat and melt and raise the temperature to 650°C, then add Al powder to the molten crude lead melt in a ratio of 1:3, stir mechanically for 45 minutes, Al and crude lead Arsenic-antimony-copper in the melt forms AsAl, SbAl, and CuAl 2 Wait until the compound floats to the surface of the lead melt to become scum, stop stirring, scoop up the scum on the surface of the lead melt, and cast ingots. Sampling test results: w As : 0.30%, w Sb : 0.70%,. w Cu : 0.04%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for removing arsenic, antimony and copper by refining raw lead. The invention aims to provide the method for removing the arsenic, antimony and copper by refining the raw lead. The method is characterized by comprising the following steps of: A, putting raw lead ingots into an open lead melting pot, and heating the raw lead ingots to the temperature of between 450 and 850 DEG C for melting lead into lead liquid; B, putting aluminum or aluminum alloy into the lead liquid obtained in the step A, fully mixing the aluminum or the aluminum alloy and the lead liquid with stirring, and generating scum which floats to the surface of the lead liquid; C, fishing the scum, namely fishing the scum generated in the step B after stirring to obtain the lead liquid removed with arsenic, antimony and copper; and D, casting ingots, namely casting the ingots by using the impurity removed lead liquid obtained in the step C to obtain lead ingots removed with the arsenic, antimony and copper. The method is mainly used for removing the arsenic, antimony and copper by refining the raw lead.

Description

technical field [0001] The invention relates to a method for producing lead, in particular to a method for refining crude lead to remove arsenic, antimony and copper. Background technique [0002] Arsenic and antimony are common associated metals in lead concentrates. Generally, the content of Sb is 0.4-0.6%, and that of As is 0.5-0.6%. Antimony goes into crude lead. The antimony in crude lead is mainly used to improve the structure of anode slime during lead electrolysis, and to fix the anode slime on the anode so that it does not fall off, thus acting as a skeleton. There are certain requirements for the antimony content in the crude lead anode. When the Sb content is less than 0.3%, the anode slime has low adhesion strength, and it is easy to fall off and enter the lead electrolyte; when the Sb content is more than 1%, the lead electrolyte will contain lead ions. When the concentration drops, the anode slime thickens and hardens, resulting in anode passivation. When cle...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/06
CPCY02P10/20
Inventor 张伟陈顺窦传龙张德晶匡立春卢鹏龙李正明
Owner ZHUZHOU SMELTER GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap