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Ultrasonic assisted alkali leaching method of vanadium from tailing residue refined with titanium tetrachloride

A titanium tetrachloride, ultrasonic-assisted technology, applied in chemical instruments and methods, vanadium compounds, inorganic chemistry, etc., can solve the problems of environmental pollution of titanium tetrachloride refining tailings, vanadium loss, etc., to reduce the roasting process, reduce The effect of pollution and energy reduction

Active Publication Date: 2020-08-18
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the invention is the environmental pollution problem and vanadium loss when the titanium tetrachloride refined tailings are piled up

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Add the refined titanium tetrachloride tailings and 20wt% sodium hydroxide solution into the reactor at a liquid-to-solid ratio of 7:1, add oxygen to the reactor, and heat it. The alkaline leaching process is carried out in an ultrasonic environment and the oxygen partial pressure is controlled to 0.2MPa, constant temperature 110°C, ultrasonic frequency 25KHz, power 200W, reaction time 0.5h; keep the reactor temperature at 70°C and filter and separate the obtained mixed slurry to obtain vanadium-containing leachate and tailings; the obtained vanadium-containing leachate is subjected to rapid After cooling treatment, sodium vanadate crystals and crystallization liquid are obtained, and then the obtained crystallization residual liquid is returned to the ultrasonic-assisted alkaline leaching step for recycling. After testing, the leaching rate of vanadium is 85%.

Embodiment 2

[0044] Add the refined titanium tetrachloride tailings and 20wt% sodium hydroxide solution into the reactor at a liquid-to-solid ratio of 7:1, add oxygen to the reactor, and heat it. The alkaline leaching process is carried out in an ultrasonic environment and the oxygen partial pressure is controlled to 0.3MPa, constant temperature 110℃, ultrasonic frequency 40KHz, power 200W, reaction time 0.5h; keep the reactor temperature at 70℃, filter and separate the obtained mixed slurry to obtain vanadium-containing leachate and tailings; the obtained vanadium-containing leachate is subjected to rapid After cooling treatment, sodium vanadate crystals and crystallization liquid are obtained, and then the obtained crystallization residual liquid is returned to the ultrasonic-assisted alkaline leaching step for recycling. After testing, the leaching rate of vanadium was 89.6%.

Embodiment 3

[0046] Add the refined titanium tetrachloride tailings and 50wt% sodium hydroxide solution into the reactor at a liquid-to-solid ratio of 7:1, add oxygen and heat it. The alkaline immersion process is carried out in an ultrasonic environment with heat preservation, and the oxygen partial pressure is controlled as 0.3MPa, constant temperature 200℃, ultrasonic frequency 40KHz, power 200W, reaction time 4h; keep the reactor temperature at 90℃, filter and separate the obtained mixed slurry to obtain vanadium-containing leachate and tailings; rapidly cool the obtained vanadium-containing leachate After treatment, sodium vanadate crystals and crystallization liquid are obtained, and then the obtained crystallization residual liquid is returned to the ultrasonic-assisted alkaline leaching step for recycling. After testing, the leaching rate of vanadium was 92.4%.

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Abstract

The invention relates to an ultrasonic-assisted alkali-leaching vanadium extraction method for titanium tetrachloride purification tailings, and belongs to the technical field of vanadium chemical engineering metallurgy. Technical problems to be solved by the method are environment pollution and vanadium loss during titanium tetrachloride purification tailing stacking. According to a technical scheme, the method includes a) mixing the titanium tetrachloride purification tailings with an alkali liquid, and feeding oxygen under ultrasonic conditions to perform leaching reaction; b) performing solid-liquid separation to obtain a titanium-containing leachate and tailings; c) rapidly cooling the titanium-containing leachate to obtain sodium vanadate crystals and a liquid after crystallization,and returning the liquid after crystallization back to the ultrasonic-assisted alkali leaching step for cycle utilization. The method omits a roasting step, reduces energy consumption and is a clean vanadium extraction method. The vanadium leaching rate is 85%-98.5%.

Description

Technical field [0001] The invention belongs to the technical field of vanadium chemical metallurgy, and specifically relates to a method for ultrasonically assisted alkali leaching extraction of vanadium from titanium tetrachloride refined tailings. Background technique [0002] Vanadium is an important strategic resource and an indispensable material for the development of modern industry, modern national defense, and modern science and technology. The application of vanadium in steel accounts for about 90% of its total consumption. Vanadium-containing high-strength low-alloy steel (HSLA) is widely used in oil / gas pipelines, construction, bridges, rails, pressure vessels, Car frame and other production and construction are underway. Vanadium is mainly used in the production of vanadium-titanium alloys in non-ferrous alloys, and it is also an excellent high-temperature structural material for aircraft and rockets. [0003] Panxi area is rich in vanadium-titanium magnetite resour...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/00C22B7/00C22B34/22
CPCC01G31/00C22B7/008C22B34/22Y02P10/20
Inventor 周丽李良李明陆平
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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