Method for extracting vanadium from vanadium-containing ores

An ore, stone coal vanadium technology, applied in the direction of improving process efficiency, can solve the problems of large amount of sulfuric acid, high energy consumption, high temperature, and achieve the effect of strong applicability of raw materials, solving material adhesion and uniform distribution

Active Publication Date: 2020-12-04
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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  • Method for extracting vanadium from vanadium-containing ores
  • Method for extracting vanadium from vanadium-containing ores
  • Method for extracting vanadium from vanadium-containing ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The present embodiment provides a method for extracting vanadium from vanadium-containing ore, said vanadium-containing ore is primary stone coal vanadium ore, and its main components and content are: V 2 o 5 0.74wt%, Fe 2 o 3 1.23wt%, CaO 0.15wt%, MgO 0.34wt%, Al 2 o 3 10.72wt%, K 2 O 3.65wt%, the rest is SiO 2 and C.

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

[0067] (1) Mix and grind the stone coal vanadium ore with ammonium sulfate and magnesium sulfate heptahydrate in a mass ratio of 1:1.5:0.07 to obtain a mixed powder with a particle size not greater than 150 μm;

[0068] (2) Roast the mixed powder obtained in step (1) for 3 hours in an atmosphere containing 20vol.% oxygen and 80vol.% water vapor, the temperature of the roasting is 330°C, and the ammonia-containing tail gas produced during the roasting process is absorbed by water , to obtain ammoniacal liquor; the obtained ammoniacal liquor is...

Embodiment 2

[0071] This embodiment provides a method for extracting vanadium from vanadium-containing ore, the vanadium-containing ore is primary stone coal vanadium ore, and its main components and contents are the same as those in Embodiment 1.

[0072] The method comprises the steps of:

[0073] (1) Mix and grind the stone coal vanadium ore with ammonium sulfate, calcium sulfate dihydrate and ferrous sulfate heptahydrate in a mass ratio of 1:1:0.03:0.03 to obtain a mixed powder with a particle size not greater than 104 μm;

[0074] (2) Roasting the mixed powder obtained in step (1) for 1 h in an air atmosphere, the temperature of the roasting is 380° C., and the ammonia-containing tail gas produced in the roasting process is absorbed by sulfuric acid to obtain an ammonium sulfate solution; the obtained ammonium sulfate solution After being made into solid ammonium sulfate, it is returned for recycling;

[0075](3) The mixed powder after step (2) is roasted is leached with water at 65°...

Embodiment 3

[0077] The present embodiment provides a method for extracting vanadium from vanadium-containing ores, the vanadium-containing ores are primary stone coal vanadium ores, and the main components and contents are respectively: V 2 o 5 1.26wt%, Fe 2 o 3 0.59wt%, CaO 6.35wt%, MgO2.17wt%, Al 2 o 3 7.62wt%, K 2 O 2.16wt%, the rest is SiO 2 and C.

[0078] The method comprises the steps of:

[0079] (1) Mix and grind the stone coal vanadium ore, ammonium bisulfate and water in a mass ratio of 1:1.2:0.2 to obtain a mixed powder with a particle size not greater than 89 μm;

[0080] (2) The mixed powder obtained in step (1) is roasted for 6 hours in an atmosphere containing 5vol.% of air and 95vol.% of water vapor. The temperature of roasting is 300°C. Absorb to obtain ammonia water; the obtained ammonia water is used for the neutralization of vanadium-containing leachate;

[0081] (3) The mixed powder after step (2) is roasted is leached with water at 60°C for 120min, and t...

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Abstract

The invention provides a method for extracting vanadium from vanadium-containing ores. The method comprises the following steps: mixing the vanadium-containing ores with ammonium salt and a water-based additive, roasting and then leaching, and carrying out solid-liquid separation to obtain vanadium-containing leachate and leaching slag. According to the method, an ammonium salt roasting technologyis adopted, the vanadium-containing minerals of the vanadium-containing ores are oxidized, decomposed and converted into water-soluble vanadium-containing compounds by adding the water-based additive, so that the leaching rate of vanadium is increased, and meanwhile, the problems of material adhesion, wall adhesion, agglomeration, ring formation and the like are solved; and the method is low in energy consumption, high in raw material applicability, high in ammonium salt utilization rate, low in residual acid content in the leachate, simple to operate, environment-friendly, good in economic benefit and beneficial to industrial large-scale production, and has a relatively good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and metallurgy, and relates to a method for extracting vanadium from vanadium-containing ores. Background technique [0002] As an important strategic resource, vanadium is widely used in the fields of iron and steel, national defense cutting-edge technology, chemical industry, and light textile industry. With the development of science and technology, my country's demand for vanadium resources is also increasing. my country's vanadium resources mainly exist in vanadium-titanium magnetite and stone coal. Among them, stone coal is a kind of black carbon-containing shale, which is formed by accumulation under reducing conditions after the death of shallow sea bacteria and algae, and is one of the main raw materials for vanadium extraction. [0003] At present, the methods for extracting vanadium from stone coal vanadium ore mainly include two categories: roasting method and acid leaching...

Claims

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Application Information

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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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