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Tellurobismuthite leaching method

A bismuth telluride ore and leaching technology, applied in the field of metallurgy, can solve the problems of incomplete processing of raw materials, few sources, low product output and the like

Inactive Publication Date: 2017-07-28
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, domestic tellurium separation and extraction technologies mainly include soda ash roasting method, sulfated roasting method, etc., but most of the raw materials have a single source and a small amount of source, and the raw material treatment is incomplete, high energy consumption, and low product output.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Leach tellurium from gray bismuthite: the original gray bismuthite contains 3.65% tellurium and 4.89% bismuth, and the grinding particle size reaches 90% ore powder is over 200 mesh. Put the above-mentioned bismuth tellurite into a roasting furnace, and roast at a temperature of 400°C for 5 hours. Continue to grind the fully roasted ore powder until 90% of the ore powder passes 200 mesh. Slowly add the pretreated bismuth tellurite to a 180g / L sulfuric acid solution at a solid-to-liquid ratio = 1:4, pass through an ozone concentration of 30mg / h, add 0.8g sodium dodecylbenzenesulfonate powder, and For leaching, the leaching process adopts 150r / min mechanical stirring, and the leaching stirring time is 3h. The measured and calculated tellurium content in the leaching solution is 98.78%, and the bismuth content is 97.23%.

Embodiment 2

[0019] Leach tellurium from gray bismuthite: the original gray bismuthite contains 3.02% tellurium and 7.78% bismuth, and the grinding particle size reaches 90% ore powder is over 200 mesh. Put the above-mentioned bismuth tellurite into a roasting furnace, and roast at a temperature of 400°C for 5 hours. Continue to grind the fully roasted ore powder until 90% of the ore powder passes 200 mesh. Slowly add the pretreated bismuth tellurite to a 180g / L sulfuric acid solution at a solid-to-liquid ratio = 1:4, pass through an ozone concentration of 30mg / h, add 0.8g sodium dodecylbenzenesulfonate powder, and For leaching, the leaching process adopts 150r / min mechanical stirring, and the leaching stirring time is 3h. The measured and calculated tellurium content in the leaching solution is 99.02%, and the bismuth content is 98.65%.

Embodiment 3

[0021] Leach tellurium from gray bismuthite: the original gray bismuthite contains 3.20% tellurium and 5.92% bismuth, and the grinding particle size reaches 90% ore powder is over 200 mesh. Put the above-mentioned bismuth tellurite into a roasting furnace, and roast at a temperature of 400°C for 5 hours. Continue to grind the fully roasted ore powder until 90% of the ore powder passes 200 mesh. Slowly add the pretreated bismuth tellurite to a 180g / L sulfuric acid solution at a solid-to-liquid ratio = 1:4, pass through an ozone concentration of 30mg / h, add 0.8g sodium dodecylbenzenesulfonate powder, and For leaching, the leaching process adopts 150r / min mechanical stirring, and the leaching stirring time is 3h. The measured and calculated tellurium content in the leaching solution is 98.31%, and the bismuth content is 97.11%.

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PUM

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Abstract

The invention discloses a tellurobismuthite leaching method. The method comprises the steps that crude tellurobismuthite is subjected to crushing treatment, and grinding is conducted to enable the particle size to meet the requirement that 90% of ore powder can pass through a 200-mesh sieve; treated tellurobismuthite is put into a roasting furnace, roasting is conducted for 4 h to 6 h at the temperature ranging from 400 DEG C to 450 DEG C, and tellurobismuthite subjected to roasting is collected; grinding is continuously conducted to enable the particle size to meet the requirement that 90% of ore powder can pass through the 200-mesh sieve, pretreated tellurobismuthite is put into a sulfuric acid medium, ozone with the concentration ranging from 10 mg / h to 50 mg / h is introduced, an appropriate amount of surfactant is added, leaching is conducted at 70 DEG C to 80 DEG C, and leachate is obtained, wherein 100 r / min to 200 r / min mechanical stirring is conducted in the leaching process, and the leaching stirring time ranges from 3 h to 4 h. According to the tellurobismuthite leaching method, the technological process is simple, operation is convenient, no special equipment requirement exists, the cost is low, the method is suitable for industrial scale production, the leaching rate of tellurium is 98% or above, the leaching rate of bismuth is 97% or above, and tellurium and bismuth in tellurobismuthite are fully leached; meanwhile, leached leachate provides a good condition for extraction of downstream tellurium and bismuth.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for leaching bismuth tellurite. Background technique [0002] Tellurium is a scattered non-metallic element with extremely low content in nature. In the field of metallurgy, the application of tellurium accounts for 78% of the total application. Tellurium can enhance the machinability of steel, improve the yield of stainless steel and low carbon steel processing; tellurium can enhance the thermal shock resistance and mechanical vibration resistance of iron, improve Its anti-corrosion and anti-fatigue properties. In the field of petrochemical industry, the application of tellurium in petroleum and chemical fields accounts for 12%, and tellurium catalysts are used in petroleum cracking and coal hydrogenation; adding tellurium can also prevent the oxidation of polymethylsiloxane; in photography, printing Tellurium has also shown good application effects in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/08C22B30/06C01B19/00
CPCC01B19/00C22B1/02C22B3/08C22B30/06Y02P10/20
Inventor 周堃龙剑平曾英王珂王云燕
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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