Clean metallurgical method for bismuth or stibium by wet method

A wet and clean technology, applied in the field of bismuth extraction, can solve the problems of large discharge of "three wastes", difficulty in liquid-solid separation, slow reduction speed, etc., achieve significant economic and social benefits, short process flow, and effective separation Effect

Active Publication Date: 2010-07-14
YIYANG SHENGLI CHEM IND
View PDF3 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These metallurgical processes have their own advantages, but most of them have the following disadvantages: 1. The selected oxidizing agent has strong corrosiveness, strict requirements on equipment materials, and difficult operation; 2. The ion concentration of the solution is high, especially FeCl 3 When the concentration is high, the viscosity of the solution is high, resulting in difficulty in liquid-solid separation; 3. The discharge of "three wastes" is large, causing great environmental pressure; 4. The replacement method consumes a large amount of iron powder, and the produced FeCl 2 Need to use Cl 2 Oxidized to FeCl 3 5. The reagent consumption is large, the cost is high, etc.
The defect of antimony pyrometallurgy is mainly SO 2 Serious pollution, difficult to control
Low recovery rate
In the smelting process, due to the large number of returned materials, the direct recovery rate and recovery rate of metals are not ideal, which affects the technical and economic indicators of smelting, and greatly affects the economic benefits of the enterprise.
[0006] And there are also many problems in the existing antimony wet smelting method: 1) in the sodium sulfide leaching-sodium thioantimonite solution electrodeposition method, the accumulation of sodium su

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Clean metallurgical method for bismuth or stibium by wet method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The composition of bismuth concentrate provided by a company in Hunan is: Bi25.02%, WO 3 0.43%, Mo 3.17%, Fe 20.68%, SiO 2 6.33%, Cu1.6%. S 26.5%.

[0044] Take 100g of the above-mentioned bismuth concentrate powder, and make it -1 , Oxidant NaClO 3 The amount of addition (by Bi 2 S 3 consumption) is 1.5 times of the theoretical amount, and the leaching temperature is 70°C for 3 hours, then filtered and separated, the washing liquid and the filtrate are combined, and the filter residue is dried and weighed. The content of bismuth in the filtrate and filter residue was analyzed, and the leaching rate of bismuth was 99.6% (liquid basis) / 99.1% (residue basis).

[0045] Analysis of impurity components and Fe in the filtrate 3+ , Cu 2+ , Ag + content, add 1.5 times the theoretical amount of bismuth powder to carry out reduction and purification agent to remove impurities, react at room temperature for 60 minutes, and then filter and separate.

[0046] In the reducti...

Embodiment 2

[0049] The composition of antimony concentrate provided by a company in Hunan is: Sb 37.31%, Fe 13.68%, SiO 2 6.33%, Cu 4.6%, S 26.5%.

[0050] Take 100g of the above-mentioned antimony concentrate powder, in the liquid-solid ratio of 5:1, the acidity of hydrochloric acid is 4.5mol L -1 , Oxidant SbCl 5 The amount of addition (as Sb 2 S 3 consumption) is twice the theoretical amount, and the leaching temperature is 60°C for 2 hours, then filtered and separated, the washing liquid and the filtrate are combined, and the filter residue is dried and weighed. The antimony content in the filtrate and filter residue was analyzed, and the antimony leaching rate was 98.9% (liquid basis) / 99.4% (residue basis).

[0051] Analyze the main impurity components and Fe in the filtrate 3+ , Cu 2+ content, adding 1.2 times the theoretical amount of antimony sponge powder and 1.4 times the theoretical amount (NH 4 ) 2 S is subjected to the reduction and purification agent to remove impuri...

Embodiment 3

[0055] A kind of bismuth-containing dust, bismuth with Bi 2 o 3 Morphology exists. The main components (%) are: Bi4.23, Pb 41.30, Sn 3.01, Zn 1.0, Cu 1.7, As 2.3, S 9.7, Cd 0.12, In 0.016, Ag 0.01, Ge 0.02.

[0056] Take 10000g of the above-mentioned bismuth soot powder, when the liquid-solid ratio is 4:1, and the acidity of hydrochloric acid is 4mol L -1 1. After leaching for 3 hours at a leaching temperature of 50°C, filter and separate, combine the lotion with the filtrate, dry and weigh the filter residue. The content of bismuth in the filtrate and filter residue was analyzed, and the leaching rate of bismuth was 96.2% (liquid basis) / 95.5% (residue basis).

[0057] Add 1.2 times of theoretical amount of sponge bismuth powder and 1.3 times of theoretical amount (NH 4 ) 2 S was used as a reduction and purification agent, and after reduction and purification at room temperature for 40 minutes, it was filtered and separated.

[0058] In the reduction purification solutio...

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 clean metallurgical method for bismuth or stibium by a wet method, comprising steps of leaching, purifying, diaphragm electrodepositing and the like. The method comprises the following steps: firstly, selectively leaching the bismuth (or the stibium) from bismuth concentrate (or stibium concentrate); then, purifying and reducing leachate; and finally, extracting the bismuth (or stibium) by adopting diaphragm electrodeposition. The electro-bismuth (or electro-stibium) is obtained on a negative plate, and oxidant solution is obtained in an anode chamber. The oxidant solution can be used as the oxidant required in the leaching step, and is returned to the leaching process. The method achieves closed loop circulation of the technical process, recycled oxidant, better solves the problems of high consumption, severe equipment corrosion, low metal reclamation, difficult comprehensive reclamation of other valuable metals, large discharge of wastewater and the like universally existing in the prior wet bismuth (or stibium) extracting process. The method is particularly suitable for treating low-grade difficult-treatment complicated bismuth (stibium) mineral or bismuth (stibium) containing materials, and has outstanding advantages of strong raw material adaptability and high metal reclamation.

Description

technical field [0001] The invention belongs to the field of metallurgy and chemical industry, and relates to a method for extracting bismuth (or antimony) from bismuth concentrate (antimony concentrate) or materials containing bismuth (or antimony). Background technique [0002] Bismuth is a "green" rare metal widely used in bismuth-based low melting point alloys, metallurgical additives, medicine and military industries and other fields. Bismuth has very little stock in nature, its abundance is comparable to that of silver, and most of it is symbiotic with lead, tungsten and molybdenum deposits, so bismuth is generally recovered as a by-product in the smelting process of tungsten, molybdenum, lead, copper and tin. There are two methods of smelting bismuth: wet method and fire method. For high-grade bismuth concentrate, pyrolysis is usually used. However, since the late 1960s, with the increase of complex refractory low-grade bismuth ores, high-silicon bismuth ores and var...

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
IPC IPC(8): C25C1/22C22B3/10
Inventor 杨建广唐朝波唐谟堂何静杨声海
Owner YIYANG SHENGLI CHEM IND
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