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Method for extracting vanadium from extracted vanadium tailings

A technology for extracting vanadium tailings and vanadic acid, applied in the direction of improving process efficiency, etc., can solve problems such as complicated processing procedures, large equipment investment, and difficult industrialization, and achieve environmentally friendly industrialization, reduce production costs, and simple methods Effect

Inactive Publication Date: 2013-04-17
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] Although the above two patented technologies can recover useful metals from vanadium extraction tailings, the method requires large investment in equipment, complicated treatment procedures, and certain difficulties in industrialization.

Method used

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  • Method for extracting vanadium from extracted vanadium tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for extracting vanadium from vanadium extraction tailings. The method as figure 1 As shown, the specific steps are:

[0028] Step 1: Roasting the vanadium-containing converter steel slag and immersing in water to obtain a water immersion liquid and a water immersion slag, the water immersion slag is the tailings for vanadium extraction.

[0029] Step 2: Add calcium fluoride accounting for 2~4wt% of the vanadium extraction tailings to the vanadium extraction tailings, and add 10~15% to the vanadium extraction tailings and calcium fluoride at a liquid-solid ratio of 1~1.5L / Kg The volume concentration of sulfuric acid is reacted at 90-100°C for 1.5-2.0 hours, and the solid and liquid are separated to obtain vanadium-containing acid leaching solution and acid leaching tailings.

[0030] Step 3: Adjust the pH value of the vanadium-containing acid soak solution obtained in step 1 to 4.0-4.5 with sodium hydroxide solution, stir at room temperature for 1-5 minutes, a...

Embodiment 2

[0033] A method for extracting vanadium from vanadium extraction tailings. The method as figure 1 As shown, the specific steps are:

[0034] Step 1 is the same as Step 1 in Example 1.

[0035] Step 2: Add calcium fluoride accounting for 4~6wt% of the vanadium extraction tailings to the vanadium extraction tailings, and add 15~20% to the vanadium extraction tailings and calcium fluoride at a liquid-solid ratio of 1.5~2.0L / Kg The volume concentration of sulfuric acid is reacted at 90-100°C for 2.0-2.5 hours, and the solid and liquid are separated to obtain vanadium-containing acid leaching solution and acid leaching tailings.

[0036] Step 3: Adjust the pH value of the vanadium-containing acid soak solution obtained in step 1 to 4.5-5.0 with sodium hydroxide solution, stir at room temperature for 5-10 minutes, and separate solid and liquid to obtain a vanadium-containing mixture and a treatment solution.

[0037] Step 4 is the same as Step 4 in Embodiment 1.

Embodiment 3

[0039] A method for extracting vanadium from vanadium extraction tailings. The method as figure 1 As shown, the specific steps are:

[0040] Step 1 is the same as Step 1 in Example 1.

[0041] Step 2: Add calcium fluoride accounting for 2~4wt% of the vanadium extraction tailings to the vanadium extraction tailings, and add 15~20% to the vanadium extraction tailings and calcium fluoride at a liquid-solid ratio of 1.5~2.0L / Kg The volume concentration of sulfuric acid is reacted at 90-100°C for 1.5-2.0 hours, and the solid and liquid are separated to obtain vanadium-containing acid leaching solution and acid leaching tailings.

[0042] Step 3: Adjust the pH value of the vanadium-containing acid immersion solution obtained in step 1 to 4.5-5.0 with milk of lime, stir at room temperature for 1-5 minutes, and separate solid and liquid to obtain a vanadium-containing mixture and a treatment solution.

[0043] Step 4 is the same as Step 4 in Embodiment 1.

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Abstract

The invention relates to a method for extracting vanadium from extracted vanadium tailings, which adopts the technical scheme that allowing vanadium-containing Bessemer furnace slag to be subjected to roasting and water immersion so as to obtain water immersed slag, actually the extracted vanadium tailings; adding calcium fluoride about 2-6 wt percent of the exacted vanadium tailings in the exacted vanadium tailings, adding sulfuric acid of 10-20 volume concentration in the exacted vanadium tailings and the calcium fluoride according to the liquid-solid ratio of 1-2L / k, allowing all materials to be reacted for 1.5-2.5 h under the temperature of 90-100 DEG C, and then carrying out solid-liquid separation to obtain the vanadium-containing pickling liquor and the pickling tailings; adjusting the pH value of the obtained vanadium-containing pickling liquor to be 4.0-5.0 through an alkali liquor, stirring under the ambient temperature for 1-10 min, carrying out solid-liquid separation to obtain a vanadium-containing mixture and a processing liquid; and mixing the vanadium-containing mixture and the vanadium-containing Bessemer furnace slag for recycling, wherein the obtained vanadium-containing Bessemer furnace slag is Bessemer furnace slag generated in the steelmaking process of vanadium titano-magnetite, and the V2O5 grade of the vanadium-containing Bessemer furnace slag is 10-20 percent. The method has the characteristics of low manufacturing cost, convenience in operation, simple process, environmental friendliness and easiness in industrialization.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of vanadium extraction tailings, in particular to a method for extracting vanadium from vanadium extraction tailings. Background technique [0002] More than 90% of my country's vanadium-titanium magnetite is concentrated in the Panxi area, and the vanadium resource reserves (in V 2 o 5 Total) was 17.542 million tons. The method of extracting vanadium by using vanadium-titanium magnetite is to first smelt vanadium-containing iron ore, coke quenching and flux in a blast furnace to obtain vanadium-containing molten iron, and then oxidize vanadium by oxygen-blowing molten iron to obtain vanadium-containing converter steel slag. The vanadium-containing converter steel slag is roasted and soaked in water to make the vanadium enter the solution, and then use the acidic ammonium salt vanadium precipitation process to obtain the vanadium-containing product. This process will produce a...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/08C22B3/44C22B34/22
CPCY02P10/20
Inventor 张一敏李秀敏刘涛黄晶包申旭陈铁军
Owner WUHAN UNIV OF TECH
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