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

Method for extracting vanadium from vanadium-contained raw material clinker via ammonium oxalate leaching

A technology of ammonium oxalate and raw materials, which is applied in the field of vanadium chemical metallurgy, can solve the problems of low production cost, poor operating environment, and short process flow, and achieve the effects of low production cost, less impurity element content, and short process flow

Active Publication Date: 2016-07-20
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF9 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the technical problems of ammonium salt loss caused by a large amount of ammonia volatilization in the leaching process of the existing vanadium slag oxidative roasting ammonium leaching technology, poor operating environment and serious loss of leaching agent, the purpose of the present invention is to provide a vanadium-containing raw material leached by ammonium oxalate A method for extracting vanadium from clinker, the method has high vanadium selective leaching rate, less impurity element leaching, and suitable pH, which can simplify or omit the purification and impurity removal process, which is beneficial to the next step of vanadium precipitation and production of high-purity vanadium products; The ammonium oxalate solution used in the method is non-volatile, which can avoid producing a large amount of ammonia in the leaching process; and the method has a short process flow, simple leaching process flow, environmental friendliness, and low production cost

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

[0031] will V 2 o 5 Vanadium slag with a content of 10.5% was roasted at 1000°C for 0.5h. The clinker was leached to extract vanadium in an ammonium oxalate solution. , to obtain vanadium extraction tailings and vanadium-containing leaching solution. Wherein, the ammonium oxalate solution is prepared by directly dissolving ammonium oxalate in a solvent; the NH in the ammonium oxalate solution 4 + The mass concentration is 200g / L, C 2 o 4 2- The mass concentration is 300g / L. The leached slag was washed, dried, weighed and analyzed for the vanadium content of the leached residue. The vanadium transfer leaching rate was detected to be 93.2%.

Embodiment 2

[0033] will V 2 o 5 Vanadium slag with a content of 14.7% was roasted at 900°C for 1 hour. The clinker was leached in ammonium oxalate solution to extract vanadium. The leaching temperature was 75°C. Vanadium tailings and vanadium-containing leachate. Wherein, the ammonium oxalate solution is prepared by directly dissolving ammonium oxalate in a solvent; the NH in the ammonium oxalate solution 4 + The mass concentration is 150g / L, C 2 o 4 2- The mass concentration is 400g / L.

[0034] The leached slag was washed, dried, weighed and analyzed for the vanadium content of the residue. It was tested that the vanadium transfer leaching rate was 90.2%.

Embodiment 3

[0036] will V 2 o 5 Vanadium slag with a content of 20% was roasted at 600°C for 5 hours. The clinker was leached to extract vanadium in ammonium oxalate solution. The leaching temperature was 20°C, the leaching liquid-solid ratio was 10mL / g, and the leaching time was 6h. Solid-liquid separation gave Extraction of vanadium tailings and vanadium-containing leaching solution. Wherein, the ammonium oxalate solution is obtained by reacting ammonia water and oxalic acid solution; NH in the ammonium oxalate solution 4 + The mass concentration is 80g / L, C 2 o 4 2- The mass concentration is 300g / L.

[0037] The leached slag was washed, dried, weighed and analyzed for the vanadium content of the leached residue. The vanadium transfer leaching rate was detected to be 93.5%.

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 provides a method for extracting vanadium from vanadium-contained raw material clinker via ammonium oxalate leaching. The method comprises the following steps: conducting blank roasting on a vanadium-contained raw material, so as to obtain the vanadium-contained raw material clinker; leaching the vanadium-contained raw material clinker in an ammonium oxalate solution for vanadium extraction; carrying out solid-liquid separation, so as to obtain leaching residue and vanadium-contained liquid. The method has the advantages that the selective vanadium leaching rate can reach up to 90% or higher; the impurity element content of the obtained vanadium-contained liquid is low; the PH value of the obtained vanadium-contained liquid is proper; the purification and impurity removing process can be simplified or eliminated, so as to facilitate the nest step of vanadium precipitation and preparation of a high-purity vanadium product; no salinity-contained wastewater is generated; the ammonium oxalate solution, which serves as a leaching agent, cannot volatilize, so as to avoid the volatilization problem of ammonia gas; and moreover, the method is simple in leaching technological process, environmentally friendly in operation, and low in production cost.

Description

technical field [0001] The invention belongs to the technical field of vanadium chemical industry and metallurgy, and relates to a method for extracting vanadium from vanadium-containing raw material clinker, in particular to a method for extracting vanadium from vanadium-containing raw material clinker by ammonium oxalate leaching. Background technique [0002] The traditional method for extracting vanadium from vanadium slag is the roasting-water leaching method to extract vanadium, among which the vanadium slag sodium roasting-water leaching vanadium extraction is the mainstream method for vanadium extraction. The method is to use sodium salt additives (such as table salt, Glauber's salt, soda ash, etc.) to help trivalent vanadium oxidize to pentavalent vanadium and convert it into soluble vanadate. The sodium roasting process needs to consume a large amount of sodium salt, and the recovery rate of vanadium is low. The recovery rate of vanadium in a single roasting is abo...

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): C22B1/02C22B3/14C22B7/00C22B34/22
CPCC22B1/02C22B3/14C22B7/008C22B34/22Y02P10/20
Inventor 杜浩郑诗礼李猛刘彪王少娜张洋
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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