Method for deeply extracting vanadium by utilizing vanadium extraction tailings

A technology for extracting vanadium tailings and depth, applied in the field of vanadium metallurgy, can solve the problems of increased management cost, low vanadium extraction rate and purity, human and environmental damage, etc., achieves good economic benefits and application prospects, and has obvious energy saving and consumption reduction effects. , to ensure the effect of purity and utilization

Pending Publication Date: 2022-04-29
承德钒钛新材料有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, if these vanadium-containing solid wastes are randomly stacked without disposal, it will not only occupy a large amount of land resources, increase the management cost of the enterprise, but also contain V in the tailings. 5+ Soluble metal ions such as ions are extremely harmful to human health and cause serious harm to people and the environment; on the other hand, if vanadium in solid waste containing vanadium is discarded, it will cause a lot of waste of resources. Therefore, it should be actively recycled Utilize, turn waste into wealth, turn harm into benefit, reduce environmental pollution, avoid waste of resources, and create considerable economic and social benefits
However, the current process of extracting vanadium from vanadium extraction tailings is complicated, the process is long, the energy consumption is high, and the extraction rate and purity of vanadium are also low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for deep vanadium extraction using vanadium extraction tailings, specifically comprising the following steps:

[0023] Step 1. Take 10g of vanadium extraction tailings, grind the ore to pass through an 80 mesh sieve, add 0.1g of semi-coke, 0.41g of starch, 0.3g of sodium vanadate and 0.5mL of water and mix to form pellets;

[0024] Step 2. Place the obtained pellets in a rotary kiln, heat up to 650°C and reduce for 5 hours to obtain a mixed material;

[0025] Step 3: Crush the mixed material, ball mill it into a fine powder with a particle size of 200 mesh, add 80°C water, and immerse in water for 2 hours to obtain a vanadium-containing solution, wherein the mass ratio of water to the mixed material is 4:1; the obtained vanadium-containing solution is circulated Sodium vanadate is obtained by crystallization when leaching to a concentration of 8g / L, and the obtained leaching slag can be directly used for blast furnace blending and ironmaking.

[0026] After de...

Embodiment 2

[0028] A method for deep vanadium extraction using vanadium extraction tailings, specifically comprising the following steps:

[0029] Step 1. Take 10g of vanadium extraction tailings, grind the ore until it passes through a 200 mesh sieve, add 0.15g of coke, 0.37g of starch, 0.3g of sodium chloride and 0.6mL of water to make pellets;

[0030] Step 2. Place the obtained pellets in a rotary kiln, heat up to 700°C and reduce for 4 hours to obtain the mixed material;

[0031] Step 3: Crush the mixed material, ball mill it into a fine powder with a particle size of 200 mesh, add water at 90°C, and immerse in water for 2 hours to obtain a vanadium-containing solution, wherein the mass ratio of water to the mixed material is 3:1; the obtained vanadium-containing solution is circulated When leaching to a concentration of 10g / L, sodium vanadate is obtained by crystallization, and the obtained leaching slag can be directly used for blast furnace blending and ironmaking.

[0032] After...

Embodiment 3

[0034] A method for deep vanadium extraction using vanadium extraction tailings, specifically comprising the following steps:

[0035] Step 1. Take 10g of vanadium extraction tailings, grind the ore until it passes through an 80 mesh sieve, add 0.12g of semi-coke, 0.45g of polyvinyl alcohol, 0.2g of sodium vanadate and 0.65mL of water and mix to form pellets;

[0036] Step 2. Place the obtained pellets in a rotary kiln, heat up to 620°C and reduce for 3 hours to obtain a mixed material;

[0037] Step 3: Crush the mixed material, ball mill it into a fine powder with a particle size of 200 mesh, add 80°C water, and immerse in water for 2 hours to obtain a vanadium-containing solution, wherein the mass ratio of water to the mixed material is 4:1; the obtained vanadium-containing solution is circulated Sodium vanadate is obtained by crystallization when leaching to a concentration of 9g / L, and the obtained leaching slag can be directly used for blast furnace blending and ironmakin...

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Abstract

The invention relates to the field of vanadium metallurgy, in particular to a method for deeply extracting vanadium by utilizing vanadium extraction tailings, which specifically comprises the following steps: grinding the vanadium extraction tailings, adding a carbonaceous reducing agent and a sodium salt additive, reacting at 600-750 DEG C for 1-5 hours, leaching after the reaction is finished, and carrying out solid-liquid separation to obtain a vanadium-containing solution; the carbonaceous reducing agent is at least one of semi-coke or coke, and the sodium salt additive is at least one of sodium vanadate or sodium chloride. According to the method, deep vanadium extraction of the vanadium extraction tailings is achieved at the temperature of 600-750 DEG C, valuable elements in the vanadium extraction tailings are recycled, the obtained leaching residues can be directly used for blast furnace ore blending ironmaking, and the obtained vanadium-containing solution can be used for vanadium crystallization. Meanwhile, process equipment is simple and easy to operate, the whole process flow is in closed cycle, clean and environmentally friendly, and good economic benefits and application prospects are achieved.

Description

technical field [0001] The invention relates to the field of vanadium metallurgy, in particular to a method for deep vanadium extraction using vanadium extraction tailings. Background technique [0002] Vanadium is an important rare metal, which has a special effect on some physical properties of materials such as tensile strength and fatigue resistance. Therefore, vanadium and its alloys are widely used in metallurgy, petrochemical, national defense and other technical fields. At present, in the smelting process of vanadium-titanium magnetite, the vanadium slag is mostly roasted by the rotary kiln sodium method. After vanadium is extracted from the vanadium slag, the vanadium content in the vanadium extraction tailings is relatively high. On the one hand, if these vanadium-containing solid wastes are randomly stacked without disposal, it will not only occupy a large amount of land resources, increase the management cost of the enterprise, but also contain V in the tailings....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B7/04C22B1/02C22B1/244C22B5/10
CPCC22B34/22C22B7/006C22B7/04C22B1/02C22B1/244C22B1/2406C22B5/10Y02P10/20
Inventor 李兰杰周冰晶卢明亮祁健张振全陈树军李男
Owner 承德钒钛新材料有限公司
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