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Method and system for treating vanadium extraction tailings

A technology for extracting vanadium tailings and vanadium slag, which is applied to the improvement of process efficiency, photography technology, instruments, etc., and can solve the problem of low utilization rate of vanadium extraction tailings

Pending Publication Date: 2017-07-18
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can realize the comprehensive recovery and utilization of iron, vanadium and gallium elements in the vanadium extraction tailings, and obtain electrolytic iron, vanadium pentoxide and metal gallium respectively, which fundamentally solves the problem of low utilization rate of vanadium extraction tailings and long-term stacking and disposal

Method used

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  • Method and system for treating vanadium extraction tailings
  • Method and system for treating vanadium extraction tailings
  • Method and system for treating vanadium extraction tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Vanadium extraction tailings (TFe content 30wt%, V 2 o 5 content of 1 wt%, Ga content of 0.010 wt%) and reduced coal according to the mass ratio of 100:15 for mixed molding treatment to obtain mixed pellets. The mixed pellets were reduced and roasted to obtain metallized pellets. The roasting temperature was 1200° C. for 30 minutes, and the metallization rate of the metallized pellets was 90%. Metallized pellets are subjected to grinding and magnetic separation to obtain gallium-containing iron powder (containing gallium 0.030wt%) and vanadium-rich slag (V 2 o 5 Content 2wt%). The vanadium-rich slag and sodium salt are mixed according to the mass ratio of 100:10, and then sodium oxide is roasted in an air atmosphere to obtain water-soluble sodium vanadate clinker (the proportion of pentavalent vanadium to total vanadium is 92%), and sodium oxide is The roasting temperature is 600°C, the time is 2h, and the water-soluble sodium vanadate clinker is soaked in water-pur...

Embodiment 2

[0086] Vanadium extraction tailings (TFe content 35wt%, V 2 o 5 content of 2wt%, Ga content of 0.012wt%) and reduced coal in a mass ratio of 100:20 for mixed molding treatment to obtain mixed pellets. The mixed pellets were reduced and roasted to obtain metallized pellets. The roasting temperature was 1300° C. for 60 minutes, and the metallization rate of the metallized pellets was 92%. Metallized pellets are subjected to grinding and magnetic separation to obtain gallium-containing iron powder (containing gallium 0.036wt%) and vanadium-rich slag (V 2 o 5 Content 4wt%). The vanadium-rich slag and sodium salt are mixed according to the mass ratio of 100:20, and then sodium oxide is roasted in an air atmosphere to obtain water-soluble sodium vanadate clinker (the proportion of pentavalent vanadium to total vanadium is 94%), and sodium oxide is The roasting temperature is 700°C, the time is 1.5h, and the water-soluble sodium vanadate clinker is soaked in water-purified-precip...

Embodiment 3

[0088] Vanadium extraction tailings (TFe content 40wt%, V 2 o 5 content of 4wt%, Ga content of 0.015wt%) and reduced coal in a mass ratio of 100:25 for mixed molding treatment to obtain mixed pellets. The mixed pellets were reduced and roasted to obtain metallized pellets. The roasting temperature was 1400° C. for 90 minutes, and the metallization rate of the metallized pellets was 95%. Metallized pellets are subjected to grinding and magnetic separation to obtain gallium-containing iron powder (containing gallium 0.045wt%) and vanadium-rich slag (V 2 o 5 Content 8wt%). The vanadium-rich slag and sodium salt are mixed according to the mass ratio of 100:30, and then sodium oxide is roasted in an air atmosphere to obtain water-soluble sodium vanadate clinker (the proportion of pentavalent vanadium to total vanadium is 96%), and sodium oxide is The roasting temperature is 900°C, the time is 1h, and the water-soluble sodium vanadate clinker is soaked in water-purified-vanadium...

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Abstract

The invention provides a method and system for treating vanadium extraction tailings. The method comprises the steps that the vanadium extraction tailings and reduced coal are mixed and formed, so that mixed pellets are obtained; reduction roasting treatment is conducted on the mixed pellets, so that metalized pellets are obtained; ore grinding magnetic separation treatment is conducted on the metalized pellets, so that iron powder containing gallium and vanadium-rich slag are obtained; the vanadium-rich slag and sodium salt are mixed and treated through oxidation sodium salt roasting, so that water-soluble sodium vanadate clinker is obtained; water leaching treatment is conducted on the water-soluble sodium vanadate clinker, so that vanadium pentoxide and first tailings are obtained; extrusion forming is conducted on the iron powder containing gallium to obtain iron anodes containing gallium, and electrolysis treatment is conducted on the iron anodes containing gallium, so that anode slime containing gallium and electrolytic iron are obtained; and gallium in the anode slime containing gallium is extracted, so that metal gallium and second tailings are obtained. By the adoption of the method, comprehensive recycling of iron elements, vanadium elements and gallium elements in the vanadium extraction tailings can be achieved, the electrolytic iron, the vanadium pentoxide and the metal gallium are obtained, and the problems that the utilization ratio of the vanadium extraction tailings is low, and the vanadium extraction tailings are stacked and abandoned for a long time are fundamentally solved.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular, the invention relates to a method and a system for treating vanadium extraction tailings. Background technique [0002] Vanadium-titanium magnetite in Panzhihua Iron and Steel is smelted in a blast furnace to obtain vanadium-containing pig iron, and then the vanadium is oxidized by selective oxidation of molten iron and then enters the slag to obtain V 2 o 5 Vanadium slag with a content of 14-22% is obtained after oxidative roasting and wet leaching, that is, vanadium extraction tailings. National vanadium enterprises discharge about 300,000 tons of vanadium extraction tailings every year, and with the increase in production capacity of vanadium enterprises If the volume is too large, the discharge of vanadium extraction tailings will gradually increase. Such a large amount of waste will accumulate all year round, which will not only occupy a lot of land, but also cause environmental...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/02C22B1/24C22B34/22C22B58/00C25C1/06
CPCC22B1/02C22B1/2406C22B7/007C22B34/22C22B58/00C25C1/06Y02P10/20
Inventor 宋文臣王静静李红科曹志成汪勤亚吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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