Method for enhancing vanadium shale ore grinding and leaching efficiency through microwaves

Abstract

The invention relates to a method for enhancing vanadium shale ore grinding and leaching efficiency by utilizing microwaves. According to the technical scheme, the method comprises the following steps: crushing and screening vanadium shale raw ore to obtain vanadium shale raw ore with the particle size of less than 1.5 mm and vanadium shale raw ore with the particle size of 1.5-10.0 mm; starting a continuous microwave treatment device for strengthening vanadium shale ore grinding and leaching efficiency, feeding vanadium shale raw ore with the particle size of 1.5-10.0 mm from a feed port at the speed of 60-150kg / h, and performing water quenching according to the mass ratio of the vanadium shale subjected to microwave treatment to water of 1: (1-3) to obtain water-quenched slurry; and mixing the water-quenched slurry with the vanadium shale raw ore with the particle size of less than 1.5 mm according to the mass ratio of the vanadium shale raw ore with the particle size of less than 1.5 mm to the vanadium shale raw ore with the particle size of 1.5-10.0 mm of 1: (1.5-2), grinding, and leaching the obtained ground product. The method is short in treatment time, low in energy consumption, free of carbon emission, good in vanadium shale grindability and leaching rate strengthening effect, easy to operate, high in treatment efficiency and suitable for microwave strengthening of a vanadium shale all-wet-process vanadium extraction system.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction from shale. Specifically, it relates to a method for enhancing the efficiency of vanadium shale grinding and leaching by microwave. Background technique [0002] Vanadium-bearing stone coal (vanadium shale) is a kind of important vanadium resource, and vanadium extraction from shale has become an important way and demand guarantee for the development and utilization of vanadium resources in my country. The grinding and leaching of vanadium shale are two important links in the process of vanadium extraction from shale. The efficiency of grinding and leaching together determines the comprehensive recovery rate of shale vanadium and the cost of vanadium extraction. As a clean energy, microwave has received extensive attention in the field of mining and metallurgy, especially in auxiliary grinding and enhanced leaching. [0003] Junpeng Wang et al. (Junpeng Wang,Tao Jinag,Yajing Liu,and ...

AI Technical Summary

Problems solved by technology

Compared with the conventional roasting method, although the roasting temperature and roasting time are shortened, and the leaching rate is also improved; but there are still technical defects such as high processing temperature, long processing time and high energy consumption; moreover, the microwave roasting temperature It has far exceeded the combustion temperature of carbon in vanadium shale, and a large amount of carbon emissions will be generated during the process

In addition, this method belongs to discontinuous microwave treatment. When a large amount of vanadium-bearing shale needs to be processed, the operation of this device will be more complicated and inefficient

Therefore, the existing technology for enhancing the leaching efficiency of vanadium-containing minerals through microwave roasting has technical defects such as long microwave treatment time, high energy consumption, large carbon emissions, complex operation and low treatment efficiency.

[0006] To sum up, the existing technology of using microwave to enhance the grinding and leaching efficiency of vanadium shale has the disadvantages of long processing time, high energy consumption, large carbon emission, small improvement of vanadium leaching efficiency, complex operation of the device and low processing efficiency. technical flaw

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