Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for recovering molybdenum and lead from wulfenite

A technology of molybdenum lead ore and lead molybdate, which is applied in the field of lead and molybdenum recovery, can solve the problems of safety and environmental disadvantages, hydrogen sulfide escape, product quality of thiomolybdate discoloration, etc., and achieve the effect of avoiding the leaching process

Active Publication Date: 2022-07-01
ZHENGZHOU UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sodium sulfide leaching process is usually carried out above 90°C, and the energy consumption is relatively large; moreover, the control on the amount of sodium sulfide is relatively strict. When sodium sulfide is insufficient, the separation effect of molybdenum and lead will be poor, and when there is too much sodium sulfide, it will cause the solution Viscosity increases, solid-liquid separation becomes more difficult, thiomolybdate is produced and discolored, resulting in a decline in product quality, etc.
In addition, sodium sulfide is easily hydrolyzed at higher temperatures to produce hydrogen sulfide gas, and is also easily oxidized into sulfur element; in the subsequent acidification and precipitation of ammonium molybdate to adjust the pH process, a large amount of hydrogen sulfide will escape, which is harmful to safety and Unfavorable environment

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
  • Method for recovering molybdenum and lead from wulfenite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] A specific embodiment of the present invention discloses a method for recovering molybdenum and lead from molybdenum lead ore.

[0079] The lead molybdate calcine obtained by oxidative roasting with molybdenum lead ore as raw material has a molybdenum content of 12.32% and a lead content of 42%.

[0080] Under the normal pressure condition of 100℃, 100g / L sulfuric acid was used for leaching, and phosphoric acid was added as a leaching aid at the same time. The dosage was 1.5 times the total molar amount of sulfuric acid.

[0081] The chemical extraction of molybdenum was carried out by using the extraction agent composed of 30% P507 and 70% sulfonated kerosene. The extraction ratio was O / A=2:1. The extraction method was countercurrent extraction, and the extraction stage was 5. Molybdenum-loaded P507 is obtained by extraction, and the extraction rate of molybdenum can reach 98%.

[0082] The raffinate is recycled to the leaching process after supplementing the sulfuric...

Embodiment 2

[0087] A specific embodiment of the present invention discloses a method for recovering molybdenum and lead from molybdenum lead ore.

[0088] The lead molybdate calcine obtained by oxidative roasting with molybdenum lead ore as raw material has a molybdenum content of 11.32% and a lead content of 40%.

[0089] Under the condition of normal pressure at 80℃, 150g / L sulfuric acid was used for leaching, and phosphoric acid was added as a leaching aid at the same time. The dosage was 1 times the total molar amount of sulfuric acid.

[0090] The chemical extraction of molybdenum was carried out by using an extractant consisting of 40% P204 and 60% sulfonated kerosene. The extraction ratio was O / A=1.2:1, the extraction method was countercurrent extraction, and the number of extraction stages was 8. Molybdenum-loaded P204 is obtained by extraction, and the extraction rate of molybdenum can reach 98.4%.

[0091] The raffinate is recycled to the leaching process after supplementing th...

Embodiment 3

[0096] A specific embodiment of the present invention discloses a method for recovering molybdenum and lead from molybdenum lead ore.

[0097] The lead molybdate calcine obtained by oxidative roasting with molybdenum lead ore as raw material has a molybdenum content of 14.52% and a lead content of 45%.

[0098] Under the condition of normal pressure at 90℃, 200g / L sulfuric acid was used for leaching, and calcium phosphate was added as a leaching aid. The dosage was 0.5 times the total molar amount of sulfuric acid. The leaching time was 5h.

[0099] The chemical extraction of molybdenum was carried out by using an extractant consisting of 10% P204 and 90% sulfonated kerosene. The extraction ratio was O / A=1.5:1. The extraction method was countercurrent extraction, and the number of extraction stages was 8. Molybdenum-loaded P204 is obtained by extraction, and the extraction rate of molybdenum can reach 98.3%.

[0100] The raffinate is recycled to the leaching process after sup...

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 relates to a method for recovering molybdenum and lead from molybdenum lead ore, belongs to the technical field of metal smelting, and solves the problems that in the prior art, strong base is adopted for leaching the molybdenum lead ore, the lead content in an obtained molybdenum product exceeds the standard, and thorough separation of the molybdenum and the lead cannot be achieved; sodium sulfide is used for leaching, temperature is high, and energy consumption is large; the use amount of sodium sulfide is difficult to control in the sodium sulfide leaching process; and hydrogen sulfide gas is generated by acidification in the process of recovering molybdenum after precipitating lead after leaching by a sodium sulfide method. The method for recovering the molybdenum and the lead from the wulfenite, provided by the invention, comprises the following steps: roasting the wulfenite to obtain roasted lead molybdate; adding a leaching agent and an auxiliary leaching agent to digest and leach the roasted lead molybdate, separating to obtain a leaching solution containing molybdenum and leaching residues enriched with lead sulfate, and directly using the leaching residues for further purification of lead; and extracting molybdenum from the leachate by using an extracting agent to obtain raffinate and molybdenum-containing extract liquor. And clean extraction of the wulfenite is realized.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a method for recovering molybdenum and lead from molybdenum-lead ore. Background technique [0002] Molybdenum is a very important rare metal. It is widely used in metallurgy, chemical industry, military, electronics, biomedicine, agriculture, environmental protection and aerospace due to its excellent physical and chemical properties such as high strength, high melting point, grinding resistance and corrosion resistance. , become an important raw material and irreplaceable strategic material in the national economy. Molybdenum-lead ore is one of the important ore sources for molybdenum production. It is often produced in the oxidation zone of lead-zinc deposits. Zinc ore, hemimorphite, limonite, hard manganese ore, perspective stone and other symbiosis. [0003] For a long time, the leaching of molybdenum-lead ore has been carried out by the alkaline process, namely the...

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): C22B34/34C22B1/02C22B3/08C22B3/38C22B13/02C22B13/00
CPCC22B34/34C22B1/02C22B3/08C22B13/02C22B13/04
Inventor 李永立赵中伟
Owner ZHENGZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com