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A method for extracting vanadium from vanadium-containing ore

A technology for ore and clay vanadium ore, applied in the field of vanadium extraction, can solve the problems of large amount of sulfuric acid, high energy consumption and high cost, and achieve the effects of less residual acid, low energy consumption and strong applicability of raw materials

Active Publication Date: 2021-06-29
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has high temperature and high energy consumption during water quenching, and the amount of sulfuric acid used in the leaching process is large and the cost is high.

Method used

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  • A method for extracting vanadium from vanadium-containing ore
  • A method for extracting vanadium from vanadium-containing ore
  • A method for extracting vanadium from vanadium-containing ore

Examples

Experimental program
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Embodiment 1

[0065] This embodiment provides a method of extracting vanadium from the vanadium ore, the vanadium ore is the primary stone coal vanadium ore, its main components and content are: V 2 O 5 0.74 wt%, Fe 2 O 3 1.23 wt%, CaO 0.15 wt%, MgO 0.34 wt%, Al 2 O 3 10.72 wt%, K 2 O 3.65 wt%, the remaining ingredients are SiO 2 And C.

[0066] The process flow chart of the method is figure 1 As shown, including the following steps:

[0067] (1) Mixing the stone coal vanadium and ammonium sulfate and phthalic sulfate is 1: 1.5: 0.07 by mass 1: 1.5: 0.07, and obtain a mixed powder having a particle size of no greater than 150 μm;

[0068] (2) The mixed powder obtained by step (1) is calcined by 20 vol.% Oxygen, 80 vol.% Water vapor, the calcination temperature is 330 ° C, and the ammonia-free gas generated during the calcination process is absorbed. To obtain ammonia water; obtained ammonia water is used in neutralization of vanadium-containing leaching liquid;

[0069] (3) The mixed powder aft...

Embodiment 2

[0071] This embodiment provides a method of extracting vanadium from the vanadium ore, the vanadium ore is the primary stone coal vanadium ore, and its main components and content are the same as in Example 1.

[0072] The method includes the following steps:

[0073] (1) Mixing the stone coal vanadium ore with ammonium sulfate, calcium sulfate and seven water sulfate is 1: 1: 0.03: 0.03 to obtain a mixed powder having a particle size of no greater than 104 μm;

[0074] (2) The mixed powder obtained by step (1) is calcined in the air atmosphere of 1 h, and the calcined temperature is 380 ° C, and the ammonia tail gas generated during the calcination process is absorbed, and ammonium sulfate solution is obtained; ammonium sulfate solution After the ammonium sulfate solid is made, it is returned to recycle;

[0075](3) The mixed powder after the step (2) is allowed to extract 60 min at 65 ° C, and the leached liquid solid ratio is 0.25m. 3 : 1T, then filtered separation to give vana...

Embodiment 3

[0077] This embodiment provides a method of extracting vanadium from the vanadium ore, the vanadium ore is the primary stone coal vanadium ore, the main components and content are: V 2 O 5 1.26WT%, Fe 2 O 3 0.59 wt%, CaO 6.35 wt%, MgO2.17Wt%, Al 2 O 3 7.62 wt%, K 2 O 2.16 wt%, the remaining ingredients are SiO 2 And C.

[0078] The method includes the following steps:

[0079] (1) Mix the stone coal vanadium ore and ammonium hydrogen sulfate and water are mixed, abrupt, and obtain a mixed powder having a particle size of no more than 89 μm;

[0080] (2) The mixed powder obtained by step (1) is calcined by 5 vol.% Air, 95 vol.%, The temperature of 300 ° C, and the ammonia tail gas generated during the calcination process is carried out by water. Absorption to obtain ammonia water; the obtained ammonia water is used in the neutralization of vanadium leaching.

[0081] (3) The mixed powder after the step (2) is fed by water 120 min at 60 ° C, and the leached liquid solid ratio is 3m....

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Abstract

The invention provides a method for extracting vanadium from vanadium-containing ore. The method comprises: mixing the vanadium-containing ore with ammonium salt and water-based additives, leaching after roasting, and separating solid and liquid to obtain vanadium-containing leaching solution and leaching slag. The method of the present invention adopts the ammonium salt roasting technology, and by adding water-based additives, the vanadium-containing minerals of the vanadium-containing ore are oxidatively decomposed and converted into water-soluble vanadium-containing compounds, which improves the leaching rate of vanadium and simultaneously solves the problem of material Problems such as sticking, wall formation, agglomeration and ring formation; the method has low energy consumption, strong raw material applicability, high ammonium salt utilization rate, less residual acid in the leachate, simple operation, environmental friendliness, good economic benefits, and It is beneficial to industrial scale production and has good industrial application prospects.

Description

Technical field [0001] The present invention belongs to the field of chemical metallurgy, involving a method of extracting vanadium from a vanadium ore. Background technique [0002] Vanadium is an important strategic resource, widely used in steel, national defense cutting-edge technology, chemical industry, and textile industries. With the development of technology, my country's demand for vanadium resources in China is getting bigger. my country's vanadium resources mainly exist in vanadium-titanium magnetite and stone coal. Among them, stone coal is a black carbon-containing shale. After the death of the algae algae, it is formed under reduction conditions, one of the main raw materials of vanadium. [0003] At present, the method of vanadium vanadium in stone coal is mainly including two categories: roasting method and acid immersion. The roasting method is required to calcine with a solution, calcium salt as auxiliary, the temperature of the calcination is high, the energy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/22C22B3/14
CPCC22B3/14C22B34/22Y02P10/20
Inventor 董玉明刘宏辉裴丽丽米界非徐红彬张懿李佐虎
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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