A method for roasting and extracting vanadium in vanadium-bearing shale

A shale and roasting technology, which is applied in the field of decomposition and extraction of vanadium-containing shale, can solve the problems of low vanadium leaching rate, low vanadium leaching rate and high roasting temperature, and achieves no environmental pollution, low raw material cost and low reaction temperature. Effect

Active Publication Date: 2018-07-17
有研资源环境技术研究院(北京)有限公司
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Problems solved by technology

Studies have shown that the leaching rate of vanadium in this method can reach more than 70%, which can reduce the emission of harmful gases. The disadvantage is still that the leaching rate of vanadium is not high
[0009] It is worth noting that the aforementioned roasting processes all have problems such as high roasting temperature and low vanadium leaching rate (<80%) to varying degrees.

Method used

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  • A method for roasting and extracting vanadium in vanadium-bearing shale
  • A method for roasting and extracting vanadium in vanadium-bearing shale
  • A method for roasting and extracting vanadium in vanadium-bearing shale

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Embodiment 1

[0024] process such as figure 1 As shown, 100g of a vanadium-bearing shale in Hubei area (the main chemical composition is shown in Table 1) was ground to a particle size of -200 mesh to -400 mesh, and mixed with 10g of concentrated sulfuric acid (content 98%) and 10g of ammonium sulfate And mix evenly, put it into a muffle furnace for roasting, control the roasting temperature to 200° C., and the roasting time to be 1 h. After roasting, the obtained material was added to sulfuric acid solution (concentration ~ 10wt%), the solid-to-liquid ratio (g / mL) was 1:5, stirred at 90°C for 2 hours, and then filtered to obtain a filtrate containing vanadium. The obtained filtrates are respectively transferred to volumetric flasks for constant volume, and the content of vanadium element therein is detected. In addition, the vanadium element in the filter residue also needs to be detected.

[0025] After calculation, the leaching rate of vanadium is 85.7%.

[0026] Table 1. Composition o...

Embodiment 2

[0029] process such as figure 1 As shown, 100g of a vanadium-bearing shale in Hubei area (the main chemical composition is shown in Table 1) was ground to a particle size of -200 mesh to -400 mesh, and mixed with 40g of concentrated sulfuric acid (content 98%) and 40g of magnesium sulfate and mixed evenly, put into a muffle furnace for roasting, the roasting temperature is controlled at 250°C, and the roasting time is 1.5h. After roasting, the obtained material was added to sulfuric acid solution (concentration ~8wt%), the solid-to-liquid ratio (g / mL) was 1:5, stirred at 70°C for 1.5h, and then filtered to obtain a filtrate containing vanadium. The obtained filtrates were respectively transferred to volumetric flasks for constant volume, and the content of vanadium element therein was detected. In addition, it is necessary to detect the vanadium element in the filter residue.

[0030] After calculation, the leaching rate of vanadium is 87.8%.

Embodiment 3

[0032] process such as figure 1 As shown, 100g of a vanadium-bearing shale in Hubei area (the main chemical composition is shown in Table 1) was ground to a particle size of -200 mesh to -400 mesh, and mixed with 70g of concentrated sulfuric acid (content 98%) and 70g of potassium sulfate and mixed evenly, put into a muffle furnace for roasting, control the roasting temperature to 300° C., and the roasting time to be 2 hours. After roasting, the obtained material was added to sulfuric acid solution (concentration ~5wt%), the solid-to-liquid ratio (g / mL) was 1:4, stirred at 60°C for 1 hour, and then filtered to obtain a filtrate containing vanadium. The obtained filtrates were respectively transferred to volumetric flasks for constant volume, and the content of vanadium element therein was detected. In addition, it is necessary to detect the vanadium element in the filter residue.

[0033] After calculation, the leaching rate of vanadium is 92.1%.

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Abstract

A method for extracting the vanadium element in vanadium shale through calcinations comprises the following steps that the vanadium containing shale is ground, and blending is carried out according to the mass ratio that the vanadium containing shale to concentrated sulfuric acid to sulfate is 1:(0.1-4):(0.1-4); the ingredients are mixed to be uniform, and calcination is carried out for 0.5 h to 5 h at the temperature of 200 DEG C to 400 DEG C; the calcined materials are subjected to sulfuric acid solution leaching at the temperature of 30 DEG C to 100 DEG C, the concentration of a sulfuric acid solution ranges from 0 wt% to 10 wt%, the leaching time ranges from 0.5 h to 4 h, filtering is carried out, and the vanadium element enters the solution. According to the method, the vanadium element in the vanadium shale can be efficiently extracted, the vanadium leaching rate is larger than 85%, and the beneficial effects of being high in recovery rate, easy and convenient to operate, low in energy consumption and the like are achieved.

Description

technical field [0001] The invention relates to the decomposition and extraction of vanadium-containing shale, in particular, the invention relates to a method for roasting and extracting vanadium element in vanadium-containing shale. Background technique [0002] The rare metal vanadium is an important strategic resource, known as the "metal vitamin". As an additive in the iron and steel metallurgy industry, it can effectively improve the toughness, elasticity, strength, wear resistance, etc. of the alloy, and has a wide range of applications; It can be used as a colorant in the glass and ceramic industries; it can be used as a catalyst in the production of sulfuric acid and petrochemicals. In recent years, with the development of the economy and the progress of science and technology, the market demand for vanadium products has increased year by year. [0003] my country is rich in vanadium resources, mainly in the form of vanadium-titanium magnetite and vanadium-bearing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B34/22
CPCY02P10/20
Inventor 高文成温建康武彪
Owner 有研资源环境技术研究院(北京)有限公司
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