Treating method of tailings generated from vanadium extraction

A technology for extracting vanadium tailings and a treatment method is applied in the direction of improving process efficiency, which can solve the problems of large amount of acid solution and difficulty in wastewater treatment, and achieve the effects of reducing sodium content, being beneficial to recycling and efficient utilization.

Active Publication Date: 2015-10-28
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

[0005] The Chinese patent with application number 201410121291.X proposes to use acid solution to remove sodium in vanadium extraction tailings to meet the requirements of blast furnace ironmaking, but this method requires a large amount of acid solution and difficult wastewater treatment

Method used

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  • Treating method of tailings generated from vanadium extraction

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Embodiment 1

[0033] A treatment method for extracting vanadium tailings, the specific steps are as follows:

[0034] (1) adding magnesium chloride to the vanadium extraction tailings, the addition of the magnesium chloride is 3% of the vanadium extraction tailings quality, mixed uniformly;

[0035] (2) Add water to the mixture in step (1), the mass volume ratio of the mixture to water is 1g: 5mL; then place it in a reactor and react for 100min under the conditions of a temperature of 90°C and a pressure of 0.1MPa ;

[0036] (3) Separating the solid and liquid of the reaction product to obtain the immersion liquid and leaching residue. The removal rate of sodium in the leaching residue is about 47.5%.

Embodiment 2

[0038] A treatment method for extracting vanadium tailings, the specific steps are as follows:

[0039] (1) Add magnesium chloride and sodium hexametaphosphate in the tailings of vanadium extraction, the addition of described magnesium chloride is 3% of the quality of the tailings of vanadium extraction, the addition of the sodium hexametaphosphate is 2% of the quality of the tails of vanadium extraction %,well mixed;

[0040] (2) Add water to the mixture in step (1), the mass volume ratio of the mixture to water is 1g: 3mL; then place it in the reactor and react for 150min under the conditions of temperature 75°C and pressure 0.1MPa ;

[0041] (3) Separating the solid and liquid of the reaction product to obtain the immersion liquid and leaching residue. The removal rate of sodium in the leaching residue is about 62.7%.

Embodiment 3

[0043] A treatment method for extracting vanadium tailings, the specific steps are as follows:

[0044] (1) adding calcium chloride to the tailings of vanadium extraction, the addition of said calcium chloride is 8% of the quality of the tailings of vanadium extraction, mixed uniformly;

[0045] (2) Add water to the mixture in step (1), the mass volume ratio of the mixture to water is 1g: 8mL; then place it in the reactor and react for 60min under the condition that the temperature is 110°C and the pressure is 0.3MPa ;

[0046] (3) Separating the solid and liquid of the reaction product to obtain the immersion liquid and leaching residue. The removal rate of sodium in the leaching residue is about 55%.

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Abstract

The invention discloses a treating method of tailings generated from vanadium extraction. The treating method adopts the technical scheme as follows: through the adoption of ions of alkaline-earth metals, sodium with stronger activity in the tailings generated from vanadium extraction is replaced to form sodium ions to enter a solution, so that the purpose of sodium removal is achieved; through the addition of a dispersing agent, the clustering phenomenon between particles is reduced, so that the removing rate of sodium is further improved. According to the treating method of the tailings generated from vanadium extraction, the sodium content can be significantly decreased, and sodium is replaced by alkaline-earth metals which have a less influence on smelting, so that the fact that the leaching residues are further subjected to blast furnace ironmaking is possible, and the efficient utilization of the tailings generated from vanadium extraction is achieved; a large amount of acid solution is avoided, and the recycle of a leaching solution is facilitated; the leaching solution can be used for leaching vanadium from vanadium slag; the removing rate of sodium in the leaching residues can be 40-70% above.

Description

technical field [0001] The invention relates to the technical field of industrial tailings treatment, in particular to a treatment method for vanadium extraction tailings. Background technique [0002] Vanadium-titanium magnetite is a typical polymetallic co-associated metal mineral resource. The vanadium in vanadium-titanium magnetite was industrialized after it was discovered in the early 20th century that vanadium in steel can significantly improve the mechanical properties of steel. In the course of decades of research and development, one of the vanadium-titanium magnetite extraction processes formed is the vanadium-titanium magnetite sodium roasting-water leaching vanadium extraction process. [0003] The vanadium extraction tailings obtained by vanadium-titanium magnetite sodium roasting-water leaching vanadium extraction process have high iron content, and the iron oxide content is generally above 60%, which is of great value for use. However, because the tailings co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B34/22
CPCY02P10/20
Inventor 郝建璋曾冠武杨金成张海平
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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