Vanadium extraction method of high-calcium and high-phosphor vanadium slag clinker

A high-calcium and high-phosphorus vanadium slag and clinker technology, applied in the direction of improving process efficiency, can solve problems such as harsh requirements of equipment and operating environment, and achieve the effect of less environmental pollution and low price

Inactive Publication Date: 2015-04-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activation of concentrated hydrochloric acid is equivalent to adding an additional process, and it has strict requirements on equipment and operating environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The high-calcium and high-phosphorus vanadium slag clinker (containing CaO13.71 w t%, V 2 o 5 13.93 w t%, P 2 o 5 0.80 w t%) is crushed and ground, and 10g of under-sieve material below 100 mesh is taken, and the particle size meets 100% <0.15mm.

[0027] Add 100mL of 10wt% Na to a 250mL Erlenmeyer flask 2 CO 3 Solution, add 10g of high-calcium and high-phosphorus vanadium slag clinker into the solution, put a rubber stopper on the mouth of the bottle without plugging it tightly, and then put it into a constant temperature water bath with magnetic stirring at 95°C, set the stirring speed to 200 r / min , the time is 30 minutes.

[0028] Immediately after the end of the reaction, filter while hot by a filter unit, and the residue is filtered with 5 w t% concentration of Na 2 CO 3 The solution was washed twice, and the washing water and the leaching solution were mixed and added to a 250mL volumetric flask, and the volume was made up to volume with deionized ...

Embodiment 2

[0030] The high-calcium and high-phosphorus vanadium slag clinker (containing CaO 13.71 w t%, V 2 o 5 13.93 w t%, P 2 o 5 0.80 w t%) is crushed and ground, and 10g of under-sieve material below 100 mesh is taken, and the particle size meets 100% <0.15mm.

[0031] Add 100mL concentration of 12.5 to a 250mL Erlenmeyer flask w t% NaHCO 3 Solution, add 10g of high-calcium and high-phosphorus vanadium slag clinker into the solution, put a rubber stopper on the mouth of the bottle without plugging it tightly, and then put it into a constant temperature water bath with magnetic stirring at 95°C, set the stirring speed to 150 r / min, the time is 60min.

[0032] Immediately after the end of the reaction, filter through a filter device while hot, and the residue is washed with 5wt% NaHCO 3 The solution was washed twice, and the washing water and the leaching solution were mixed and added to a 250mL volumetric flask, and the volume was made up to volume with deionized water. ...

Embodiment 3

[0034] High-calcium and high-phosphorus vanadium slag is prepared by chemical reagents, and high-calcium and high-phosphorus vanadium slag clinker (containing CaO 20.12 w t%, V 2 o 5 11.44 w t% ,P 2 o 5 0.52 w t%).

[0035] After the clinker is crushed and ground, take 10g of the sieve under 100 mesh, and the particle size meets 100%w t% NaHCO 3 Solution, add 10g of high-calcium and high-phosphorus vanadium slag clinker into the solution, put a rubber stopper on the mouth of the bottle without plugging it tightly, and then put it into a constant temperature water bath with magnetic stirring at 95°C, set the stirring speed to 250 r / min, start timing the reaction for 90 minutes.

[0036] Immediately after the end of the reaction, filter while hot by a filter unit, and the residue is filtered with 5 w t% concentration of NaHCO 3 The solution was washed twice, and the washing water and the leaching solution were mixed and added to a 250mL volumetric flask, and the volu...

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PUM

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Abstract

The invention provides a vanadium extraction method of a high-calcium and high-phosphor vanadium slag clinker. The method comprises the following steps: crushing, grinding and screening the high-calcium and high-phosphor vanadium slag clinker with greater than 7wt% of CaO and greater than 0.6wt% of P2O5 until the particle size is 0.050-0.154mm, wherein the mass ratio of CaO to V2O5 is greater than 0.7, then carrying out carbonation leaching in a Na2O3 solution with a concentration of 3-20wt% or a NaHCO3 solution with a concentration of 4-25wt%, wherein a solid-liquid ratio is 1:1mL / g-1:15mL / g, the leaching temperature is 50-99 DEG C, the leaching time is 30-120 minutes and the stirring rate is higher than 150 revolutions per minute during leaching; carrying out solid-liquid separation to obtain a vanadium-containing leaching liquid; and then preparing a vanadium product by using the existing mature process of precipitating vanadium and deaminizing. According to the method, the leaching operation process is simple; a leaching agent is low in cost; a high vanadium leaching rate can be achieved; the leaching of phosphor in the vanadium slag clinker can be avoided; and the effective vanadium extraction of the high-calcium and high-phosphor vanadium slag clinker can be implemented.

Description

technical field [0001] The invention belongs to the field of rare metal wet extraction, in particular to a method for extracting vanadium from high-calcium and high-phosphorus vanadium slag clinker. Background technique [0002] Phosphorus is a harmful element in the acidic ammonium salt precipitation of vanadium-containing leaching solution. It will form a stable and complex complex with vanadium in acidic medium. Phosphorus vanadium series heteropolyacids and their salts. Iron ions and aluminum ions form FePO 4 , AlPO 4 Precipitation, these will pollute the precipitation of ammonium vanadate and seriously affect the progress of vanadium precipitation of acidic ammonium salt. The commonly used dephosphorization method is to adjust the pH of the solution between 9.5 and 11.0, and then add an appropriate amount of calcium salt or magnesium salt to form a phosphate precipitate. Generally, the P concentration of the leachate after dephosphorization is required to be <0.0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B26/22
CPCY02P10/20
Inventor 宋文臣李宏王艳南王耀冯佳
Owner UNIV OF SCI & TECH BEIJING
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