Process for extracting vanadium from stone coal by acid method by using leaching agent

A technology of leaching aid and stone coal acid, which is applied in the field of vanadium extraction by stone coal acid method, can solve the problems of low total recovery rate and low leaching rate, and achieve the effects of increasing economic benefits, reducing costs, and overcoming low recovery rate

Inactive Publication Date: 2010-09-29
SHANYANG YINHUA MINING
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Problems solved by technology

[0004] However, compared with the hydrometallurgical process of other elements, its total recovery rate is still low, the root cause is that the leaching rate cannot increase, and the reason why the leaching rate of vanadium-containing stone coal is low has many reasons, including low-valence vanadium (V +2 , V +3 ) is generally mostly in the majority, and it is also closely related to its occurrence state. Most of the vanadium in stone coal is isomorphic. On the contrary, there are very few vanadium in the adsorption state. It is very difficult to destroy this structure, so it causes leaching. low rate
Therefore, how to increase the leaching rate is also the key to the process of extracting vanadium from stone coal. At present, there are no reports, literature records or practical applications on how to increase the leaching rate.

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  • Process for extracting vanadium from stone coal by acid method by using leaching agent

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[0021] Compared with the hydrometallurgical process of other elements, the total recovery rate of vanadium in the existing stone coal acid vanadium extraction process is still low. The root cause is that the leaching rate cannot be improved. There are many reasons, among which, in addition to low-valence vanadium (V +2 , V +3 ) is generally mostly in the majority, and it is also closely related to its occurrence state. Most of the vanadium in stone coal is isomorphic. On the contrary, there are very few vanadium in the adsorption state. It is very difficult to destroy this structure, resulting in the leaching rate. Low.

[0022] The principle of the present invention is to use a small amount of cheap CaF 2 added to the leaching process to achieve a small amount of H 2 SO 4 In exchange for a small amount of HF, in order to destroy its structure and achieve the effect of increasing the leaching rate, a small amount of CaF 2 Joining is not only low cost, but also ensures tha...

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Abstract

The invention discloses a process for extracting vanadium from stone coal by an acid method by using a leaching agent. The process comprises the following steps of: rude ore crushing, acid leaching, liquid-solid separation, solution pretreatment, extraction and back-extraction, oxidization of the vanadium precipitation, and red vanadium deamination, wherein a CaF2-containing leaching agent is added in the step of rude ore crushing or / and acid leaching and pulping; and the weight ratio of rude ore to CaF2 is 100:1-8. Due to the adoption of the process, the technical problem that the leaching rate of vanadium-containing stone coal is low is solved; the leaching rate is high; specific yield is improved; and unit cost is saved.

Description

technical field [0001] The invention relates to a process for extracting vanadium from stone coal by an acid method, in particular to a process for extracting vanadium by an acid method from stone coal using a leaching aid. Background technique [0002] As we all know, vanadium-containing stone coal is one of the unique and rich vanadium resources in my country, but for a long time, the vanadium extraction process from vanadium-containing stone coal has been dominated by the classic salt roasting process. development requirements; second, the recovery rate of vanadium is extremely low, usually ≤ 50%, such a low recovery rate is also a great waste of my country's rich vanadium-containing stone coal resources; third, the degree of mechanized continuous operation is poor, especially The original two-step vanadium sinking method is difficult to scale up. For this reason, this old technology has been discontinued or banned by the government. [0003] Instead, the vanadium extracti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B3/04C22B3/46B02C23/06
CPCY02P10/20
Inventor 鲁兆伶缪晓宏
Owner SHANYANG YINHUA MINING
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