Supercharge Your Innovation With Domain-Expert AI Agents!

Method for recycling tungsten carbide and cobalt sulfate from tungsten carbide waste

A technology of tungsten carbide and tungsten waste, applied in the direction of cobalt sulfate, carbide, tungsten/molybdenum carbide, etc., can solve the problems of low leaching rate, low leaching rate, long leaching time, etc., and achieve low input cost and method. Simple operation and high recovery rate

Active Publication Date: 2019-12-31
XIAMEN TUNGSTEN +1
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, a large amount of reducing agent is added during the treatment process; on the other hand, sodium sulfite and sulfur dioxide will release sulfur dioxide gas during use, and the leaching time is long and the leaching rate is not high
Another method adopted is to use acid atmospheric pressure leaching of tungsten carbide waste to recover the cobalt in it, and the slag after recovering the cobalt is oxidized and roasted to recover the tungsten in it. This method has a long leaching time and a low leaching rate.
[0003] Therefore, the existing technology for recycling tungsten and cobalt in tungsten carbide waste needs to be improved

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 recycling tungsten carbide and cobalt sulfate from tungsten carbide waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Get 300kg of tungsten carbide waste (the mass content of tungsten is 3%, the mass content of cobalt is 20%, the mass content of oil is 5%, and the mass content of water is 3%), and the tungsten carbide waste is dried at a drying temperature of 150 °C, drying time 24h, to obtain a dried material with an oil content of 0.2wt% and a moisture content of 0.1wt%;

[0039] (2) The dried material is crushed by crushing equipment, passed through a 150-mesh screen, and the crushed material with a particle size of not less than 150 mesh is obtained;

[0040] (3) Add water to the crushed material to adjust the slurry, add concentrated sulfuric acid to the slurry, the amount of concentrated sulfuric acid is 1.2 times the theoretical value, and then add water to adjust the solid-liquid ratio to 1:10, and then send the obtained slurry into high pressure oxygen The high-pressure oxygen immersion reaction is carried out in the immersion equipment. The reaction conditions include the...

Embodiment 2

[0042] (1) Get 500kg of tungsten carbide waste (the mass content of tungsten is 95%, the mass content of cobalt is 3%, the mass content of oil is 4%, and the mass content of water is 5%), and the tungsten carbide waste is dried at a drying temperature of 300 °C, drying time 1h, to obtain a dried material with an oil content of 0.3wt% and a moisture content of 0.2wt%;

[0043] (2) The dried material is crushed by crushing equipment, passed through a 100-mesh screen, and the crushed material with a particle size of not less than 100 mesh is obtained;

[0044] (3) Add water to the crushed material to adjust the slurry, add concentrated sulfuric acid to the slurry, the amount of concentrated sulfuric acid is 3.0 times the theoretical value, and then add water to adjust the solid-liquid ratio to 1:3, and then send the obtained slurry into the high pressure oxygen The high-pressure oxygen immersion reaction is carried out in the immersion equipment. The reaction conditions include r...

Embodiment 3

[0046] (1) Get 400kg of tungsten carbide waste (the mass content of tungsten is 80%, the mass content of cobalt is 5%, the mass content of oil is 3%, and the mass content of water is 7%), and the tungsten carbide waste is dried at a drying temperature of 250 °C, drying time 8h, to obtain a dried material with an oil content of 0.2wt% and a moisture content of 0.2wt%;

[0047] (2) The dried material is crushed by crushing equipment, passed through a 60-mesh screen, and the crushed material with a particle size of not less than 60 mesh is obtained;

[0048] (3) Add water to the crushed material to adjust the slurry, add concentrated sulfuric acid to the slurry, the amount of concentrated sulfuric acid is 2.0 times the theoretical value, and then add water to adjust the solid-liquid ratio to 1:4, and then send the obtained slurry into the high pressure oxygen The high-pressure oxygen immersion reaction is carried out in the immersion equipment. The reaction conditions include the...

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

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for recycling tungsten carbide and cobalt sulfate from tungsten carbide waste. The method comprises the step (1) of mixing the tungsten carbide waste, concentrated sulfuric acid and water for obtaining mixed slurry; the step (2) of performing high pressure oxygen leaching treatment to the mixed slurry for obtaining oxygen leaching solutions; and the step (3) of performing solid-liquid separation treatment to the oxygen leaching solutions for obtaining cobalt sulfate solutions and the tungsten carbide. By adopting the method, tungsten and cobalt elements in thetungsten carbide waste can be recycled effectively; the recovery rate is high, and the cobalt recovery rate is up to 97% and above; compared with a traditional recycling process, the method disclosedby the application has the advantages of no harmful gas, simple operation and low input cost, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of recovery and reuse of tungsten carbide waste materials, in particular to a method for recovering tungsten carbide and cobalt sulfate from tungsten carbide waste materials. Background technique [0002] With the rapid development of the chemical industry, the dominance of resources is getting higher and higher, and the pressure on environmental protection is also getting heavier. Tungsten and cobalt are important non-renewable resources. With the increasing scarcity of ore, the recovery of secondary resources is becoming more and more important. The current process mainly adopts saltpeter smelting method, crushing method, chemical method, etc. to recover tungsten and cobalt in tungsten carbide waste. Among them, the chemical method is used to recover tungsten and cobalt in tungsten carbide waste. The main methods are oxidative roasting of tungsten carbide waste, alkali leaching to recover tungsten, and the slag aft...

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): C22B34/36C22B23/00C22B7/00C01B32/949C01G51/10
CPCC22B34/36C22B23/043C22B7/007C01B32/949C01G51/10Y02P10/20
Inventor 黎轩王世良胡庆民
Owner XIAMEN TUNGSTEN
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com