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A method for extracting vanadium from blank roasted vanadium slag

A technology of blank roasting and vanadium slag, which is applied in the field of vanadium extraction from vanadium slag, can solve the problems of difficult and effective reuse of vanadium extraction tailings, unsatisfactory utilization effect, waste of resources and energy, etc., and achieve good social and economic benefits and low cost Low, the effect of reducing material consumption

Inactive Publication Date: 2016-01-20
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But no, the biggest problem in the vanadium extraction process of sodium roasting is that wastewater treatment and vanadium extraction tailings are difficult to effectively reuse, and there is a lot of waste in resources and energy
Domestically, Panzhihua Iron and Steel mainly adopts the calcification roasting vanadium extraction process, but there are also problems such as vanadium slag roasting rings in production, and the utilization effect is not ideal
[0004] The vanadium slag roasting process disclosed in the existing patent literature basically adopts the addition of sodium salt, potassium salt or calcium-containing substances for high-temperature roasting, and then leaching to obtain a vanadium-containing leaching solution, but chlorine gas, Many harmful gases such as carbon dioxide and hydrogen chloride are not conducive to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0041] The vanadium slag with the composition listed in Table 1 was crushed to below 120 mesh, and 100 g of the crushed vanadium slag was put into a muffle furnace for high-temperature blank roasting. The roasting temperature was controlled at 840° C. and the roasting time was 2 hours.

[0042] After the roasted clinker is cooled, crush the clinker to 120 mesh, add 100ml of water, keep the water temperature at 40°C, maintain the leaching pH value at 2.8, and control the leaching time to 40 minutes. After leaching, filter to obtain vanadium-containing leachate and tailings , detection tailings containing vanadium pentoxide 1.2%, the vanadium leaching rate of 92.2%.

example 2

[0044] The vanadium slag with the composition listed in Table 1 was crushed to below 120 mesh, and 100 g of the crushed vanadium slag was put into a muffle furnace for high-temperature blank roasting. The roasting temperature was controlled at 950° C. and the roasting time was 5 hours.

[0045] After the roasted clinker is cooled, crush the clinker to 120 mesh, add 200ml of water, keep the water temperature at 50°C, maintain the pH value of the leaching at 3.5, control the leaching time to 100min, and filter to obtain the vanadium-containing leaching solution and tailings after leaching. , detection tailings containing vanadium pentoxide 0.5%, the leaching rate of vanadium is 94.8%.

example 3

[0047]The vanadium slag with the composition listed in Table 1 was crushed to below 120 mesh, and 100 g of the crushed vanadium slag was put into a muffle furnace for high-temperature blank roasting. The roasting temperature was controlled at 900 °C and the roasting time was 3 hours.

[0048] After the roasted clinker is cooled, crush the clinker to 120 mesh, add 300ml of water, keep the water temperature at 60°C, maintain the leaching pH value at 4.0, control the leaching time to 100min, and filter to obtain vanadium-containing leachate and tailings after leaching , detection tailings containing vanadium pentoxide 0.8%, the vanadium leaching rate of 96.8%.

[0049] To sum up, the present invention adopts the method of blank roasting vanadium slag and acid leaching clinker, not only can obtain higher vanadium leaching rate, but also can make vanadium extraction tailings easy to return to the blast furnace for use, and realize the recycling of vanadium resources. It has high ec...

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Abstract

The invention discloses a method for extracting vanadium from vanadium slag through blank roasting. The method comprises the following steps: (a) crushing the vanadium slag, and carrying out high-temperature blank roasting on the crushed vanadium slag, so as to obtain clinker; (b) crushing cooled clinker, mixing the crushed clinker with water, adding sulfuric acid to leach, and filtrating, thereby obtaining vanadium containing leachate and tailing, wherein the vanadium slag is obtained through carrying out vanadium blowing on vanadium-containing molten iron. According to the method, a process of carrying out blank roasting-acid leaching on the vanadium slag, namely a vanadium extracting method of directly carrying out high-temperature blank roasting on the vanadium slag and then carrying out acid leaching on the clinker, is adopted, the material consumption is lowered, and no waste gas is discharged, so that the method is environmentally friendly and pollution-free; meanwhile, relatively high vanadium leaching rate is obtained. The method has the advantages of simplicity and easiness in use, low equipment requirements, convenience in operation, wide adaption range and low cost and has good social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction from vanadium slag, and more specifically relates to a method for extracting vanadium from blank roasted vanadium slag. Background technique [0002] Vanadium is an important metal element, which has many excellent properties and is widely used in various fields. About 85% of vanadium in the world is used in the steel industry, and the remaining 15% is mainly used in aerospace alloys, vanadium batteries, chemical industry, catalysts and other industries. [0003] The vanadium slag obtained by smelting vanadium-titanium magnetite is the main raw material for extracting vanadium at present. At present, the techniques for extracting vanadium from vanadium slag mainly include sodium roasting-water leaching vanadium extraction process and calcification roasting-acid leaching vanadium extraction process. But no, the biggest problem in the process of vanadium extraction by sodium roasting is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B34/22
Inventor 殷兆迁郭继科高官金游本银
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP