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A method for selectively separating vanadium, titanium and iron from modified vanadium slag

A selective, vanadium slag technology, applied in the field of metallurgy, can solve problems such as pollution, low efficiency, and high energy consumption, and achieve the effect of reducing energy consumption

Active Publication Date: 2019-02-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Purpose of the invention: the present invention provides a method for separating vanadium, titanium and iron from vanadium slag, its purpose is to solve the problems of high energy consumption, serious pollution and low efficiency in the traditional method for extracting vanadium from vanadium slag, effectively High content of titanium and iron resources in recovered vanadium slag

Method used

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  • A method for selectively separating vanadium, titanium and iron from modified vanadium slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Modification of vanadium slag: put the vanadium slag with 17.52% vanadium content, 13.10% titanium content and 36.73% iron content in a water quenching furnace, heat it up to 1450°C for 10 minutes with the furnace, melt and water quench, and obtain modified Vanadium slag;

[0038] (2) Crushing and screening: use a planetary ball mill to crush the modified vanadium slag, and obtain a powder with a diameter of less than 74 μm after screening;

[0039] (3) Mixing: Weigh the raw materials according to the mass ratio of ammonium sulfate: vanadium slag 8:1, and place them in a crucible for mixing;

[0040] (4) Low-temperature activation: put the above-mentioned mixed material in a muffle furnace to raise the temperature to 370°C and keep it warm for 1 hour to obtain molten material and ammonia gas;

[0041] (5) Cooling and miscibility: Place the above molten solid in the air to cool to obtain a massive solid, add the prepared dilute sulfuric acid with a volume concentrat...

Embodiment 2

[0049] (1) Modification of vanadium slag: place vanadium slag with vanadium content of 17.52%, titanium content of 13.10%, and iron content of 36.73% in a water quenching furnace, heat up to 1200°C with the furnace and quickly release and cool to obtain modified vanadium slag;

[0050] (2) Crushing and screening: use a planetary ball mill to crush the modified vanadium slag, and obtain a powder with a diameter of less than 74 μm after screening;

[0051] (3) Mixing: Weigh the raw materials according to the mass ratio of ammonium sulfate: vanadium slag 4:1, and place them in the crucible evenly;

[0052] (4) Low-temperature activation: put the above-mentioned mixed material in a muffle furnace to raise the temperature to 350°C and keep it warm for 30 minutes to obtain molten material and ammonia gas;

[0053] (5) Cooling and miscibility: Place the above molten solid in the air to cool to obtain a massive solid, add the prepared sulfuric acid with a volume concentration of 4% in...

Embodiment 3

[0061] (1) Modification of vanadium slag: place vanadium slag with vanadium content of 17.52%, titanium content of 13.10%, and iron content of 36.73% in a water quenching furnace, heat up to 1600°C with the furnace and quickly release and cool to obtain modified vanadium slag;

[0062] (2) Crushing and screening: use a planetary ball mill to crush the modified vanadium slag, and obtain a powder with a diameter of less than 74 μm after screening;

[0063] (3) Mixing: Weigh the raw materials according to the mass ratio of ammonium sulfate: vanadium slag 6:1, and place them in the crucible evenly;

[0064] (4) Low-temperature activation: Put the above-mentioned mixed material in a muffle furnace at a temperature of 400°C and keep it warm for 30 minutes to obtain molten material and ammonia gas;

[0065] (5) Cooling and miscibility: place the above molten solid in the air to cool to obtain a massive solid, add the prepared sulfuric acid with a volume concentration of 8% into the c...

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Abstract

The invention provides a method for selectively separating vanadium, titanium and iron from modified vanadium slag. The method is characterized by comprising the first step of vanadium slag modification, the second step of crushing and screening, the third step of mixing, the fourth step of low-temperature activation, the fifth step of cooling, the sixth step of mixing and dissolving, the seventh step of water bath heating, the eighth step of preparation of titanium dioxide, the ninth step of preparation of vanadium pentoxide, the tenth step of preparation of iron trioxide and the eleventh step of circulation of ammonium sulfate mother liquor. The activity of converter vanadium slag is improved through modification, main phases in the converter slag can be converted at the low calcination temperature, and comprehensive utilization of various elements of vanadium, titanium and iron in the vanadium slag is achieved. By means of the method, energy consumption needed in the production technology is reduced, no poisonous or harmful gas is produced, operation conditions are mild, an additive can be recycled, and the typical low-carbon green environment-friendly vanadium extraction technology is achieved.

Description

technical field [0001] The invention relates to a method for selectively separating vanadium, titanium and iron from modified vanadium slag, belonging to the technical field of metallurgy. Background technique [0002] Vanadium resources are widely distributed in the world, and are most concentrated in several regions such as Northern Europe, China and South Africa, with a total reserve of nearly 16 million tons. my country's vanadium resources mainly include vanadium-titanium magnetite and stone coal. Vanadium-titanium magnetite resources are mainly distributed in the Panzhihua-Xichang area of ​​Sichuan Province, and its reserves account for more than 95% of the country's total reserves. At present, in industry, vanadium-titanium magnetite is usually smelted into vanadium-containing molten iron through blast furnace, and then the molten iron is blown and oxidized into slag through converter, and the obtained slag with high vanadium content is used as converter vanadium slag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B34/12C22B34/22
CPCC22B7/007C22B7/04C22B34/125C22B34/22Y02P10/20
Inventor 张国权李春吕莉刘强任恩泽邓晨辉刘维燥汪霖
Owner SICHUAN UNIV
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