Method for acid leaching vanadium extracting from stone coal vanadium ore by using microwave pretreatment

A technology of pretreatment and stone coal vanadium, which is applied in the field of vanadium extraction from stone coal vanadium ore, can solve the problems of low production efficiency, high equipment requirements, and shortened reaction time, so as to reduce production cost, reduce sulfuric acid consumption, and adapt to the method good sex effect

Inactive Publication Date: 2019-10-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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Problems solved by technology

CN100526486C proposes a method for leaching vanadium from stone coal by oxidative transformation under pressure field, leaching under the conditions of 100-300°C, pressure 1.0-6.0Mpa, 50-98% sulfuric acid and oxidant, the leaching rate of vanadium can reach 75% As mentioned above, oxygen pressure acid leaching for refractory stone coal can significantly shorten the reaction time and increase the leaching rate of vanadium, but oxygen pressure acid leaching requires high equipment and is difficult for industrial application
CN103160696A proposes a method for extracting vanadium from vanadium-containing stone coal by microwave heating. The vanadium-containing stone coal particles are evenly wetted with sulfuric acid solution, and then microwave-heated after wetting. The heating temperature is 100-180°C, and the heating time is 3- After 30 minutes, add the heated vanadium-containing stone coal into water, stir and leaching under the condition of 25-100°C, and then separate the solid and liquid to obtain a vanadium-containing leach solution. This method has a high vanadium leaching rate, but it is still only suitable for most vanadium at high prices stone coal
In order to process the stone coal in which vanadium mostly exists in a lower valence form, CN104841682A proposes a method of sulfuric acid slaking-water immersion, the extraction rate of vanadium in this method is higher, but the slaking time of this method is 3-7 days, and the slaking time Longer, less productive

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  • Method for acid leaching vanadium extracting from stone coal vanadium ore by using microwave pretreatment

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Embodiment 1

[0049] The invention provides a method for extracting vanadium by microwave pretreatment acid leaching of stone coal vanadium ore, said method comprising the following steps:

[0050] (1) Grind the crushing to -40 mesh containing V 2 o 5 0.74% low-vanadium primary-type stone coal vanadium ore is stirred and mixed with the leachate to obtain a mixture, and the quality of the leachate in the mixture is 1% of the stone coal mass;

[0051] (2) Utilize 100W microwave to heat the mixed material obtained in step (1) to 160° C., pretreat for 5 minutes, and obtain the pretreated material;

[0052] (3) add additive and 1% sulfuric acid in the pretreatment material that step (2) obtains and carry out leaching, the liquid-solid ratio of described sulfuric acid and pretreatment material is 5:1, and the add-on of described additive is pretreatment material 0.1% of the mass, the temperature of leaching is 25°C, and the time of leaching is 60min. After the leaching is completed, through so...

Embodiment 2

[0055] The invention provides a method for extracting vanadium by microwave pretreatment acid leaching of stone coal vanadium ore, said method comprising the following steps:

[0056] (1) Grind the crushing to -40 mesh containing V 2 o 5 0.74% low-vanadium primary-type stone coal vanadium ore is stirred and mixed with the leachate to obtain a mixture, and the quality of the leachate in the mixture is 10% of the stone coal mass;

[0057] (2) Utilize 50W microwave to heat the mixed material obtained in step (1) to 320° C., and pretreat for 120 minutes to obtain the pretreated material;

[0058] (3) add additive and 20% sulfuric acid in the pretreatment material that step (2) obtains and carry out leaching, the liquid-solid ratio of described sulfuric acid and pretreatment material is 0.25:1, and the add-on of described additive is pretreatment material 5% of the mass, the leaching temperature is 30°C, and the leaching time is 20min. After the leaching is completed, the acid l...

Embodiment 3

[0061] The invention provides a method for extracting vanadium by microwave pretreatment acid leaching of stone coal vanadium ore, said method comprising the following steps:

[0062] (1) Grind the crushing to -40 mesh containing V 2 o 5 0.74% low-vanadium primary-type stone coal vanadium ore is stirred and mixed with the leachate to obtain a mixture, and the quality of the leachate in the mixture is 5% of the stone coal mass;

[0063] (2) Use 500W microwave to heat the mixture obtained in step (1) to 300°C, and pretreat for 30 minutes;

[0064] (3) add additive and 50% sulfuric acid in the pretreatment material that step (2) obtains and carry out leaching, the liquid-solid ratio of described sulfuric acid and pretreatment material is 2.5:1, and the add-on of described additive is pretreatment material 1% of the mass, the leaching temperature is 70°C, and the leaching time is 40min. After the leaching is completed, the solid-liquid separation is carried out to obtain the ac...

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Abstract

The invention relates to a method for acid leaching vanadium extracting from stone coal vanadium ore by using microwave pretreatment. The method comprises the following steps that(1) the stone coal vanadium ore is mixed with leachate to obtain a mixture; (2) microwave pretreatment is carried out on the obtained mixture obtained in the step (1)to obtain a pretreated material; and (3) an additive and sulfuric acid are added into the pretreated material obtained in the step (2) for leaching, after leaching is carried out, an acid leaching solution and leaching residue are obtained after liquid-solid separation, and the acid leaching solution is returned to the step (1);and under the microwave-assisted condition, the structure of vanadium-containing minerals in stone coal can be preliminarilydestroyed, and then the sulfuric acid and the additive are adopted for extracting vanadium. The method can be suitable for different types of stone coal vanadium ores, the acid leaching liquid is partially returned to the microwave pretreatment process, so that the acid consumption is reduced, the method has the advantages of being high in vanadium leaching rate, high in vanadium extraction speed,low in acid consumption, good in adaptability.

Description

technical field [0001] The invention relates to the technical field of vanadium extraction from stone coal vanadium ore, in particular to a method for extracting vanadium by microwave pretreatment acid leaching from stone coal vanadium ore. Background technique [0002] Stone coal is a kind of black carbon-containing shale. It is a kind of early Paleozoic coal, which is formed by accumulation under reducing conditions after the death of shallow sea bacteria and algae. Stone coal often contains vanadium in addition to silicon. One of the main raw materials for vanadium extraction, it also contains various associated elements such as aluminum, potassium, iron, calcium, magnesium, molybdenum, nickel, cobalt, copper, titanium, chromium, uranium, and selenium. Stone coal vanadium ore accounts for 30% of the total production raw materials of vanadium products in my country, and is an important raw material for the production of vanadium products in China. [0003] At present, the...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B3/08C22B34/22
CPCC22B1/00C22B3/08C22B34/22
Inventor 董玉明刘宏辉裴丽丽刘龙杨建旺张红玲王明华徐红彬张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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