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Method for removing phosphorus and extracting vanadium from high-calcium high-phosphorus vanadium slag

A high-calcium, high-phosphorus vanadium slag and low-phosphorus vanadium slag technology, applied in the field of phosphorus removal and vanadium extraction from high-calcium, high-phosphorus vanadium slag, can solve the problems of poor phosphorus removal effect, complexity, and high cost of phosphorus removal, so as to avoid the loss of vanadium , Reduce the cost of vanadium extraction and reduce the difficulty of separation

Active Publication Date: 2017-09-15
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is: provide a method for removing phosphorus and extracting vanadium from high-calcium and high-phosphorus vanadium slag, and solve the difficulty of phosphorus removal in the process of extracting vanadium from the existing high-calcium and high-phosphorus vanadium slag Large, poor phosphorus removal effect, high phosphorus removal cost, large loss of vanadium caused by phosphorus removal process, complex vanadium extraction process, difficult impurity removal process, high vanadium extraction cost and other technical problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Crushing and grinding the high-calcium and high-phosphorus vanadium slag, grinding and sieving, and taking the 200-mesh sieve as vanadium slag powder for later use.

[0033] 2) Weigh 3g of high-calcium and high-phosphorus vanadium slag powder passed through a 200-mesh sieve with an electronic balance, add sodium carbonate according to the vanadium-sodium molar ratio of 0.2, mix well, put it in an evaporating dish, and then put it in a muffle furnace at 800°C Roast for 2 hours, take it out and cool it in air, then grind the roasted clinker through a 200-mesh sieve for subsequent leaching. Then take 1g of vanadium slag roasted clinker passed through 200 sieves, put it into a three-necked bottle, then add 10mL deionized water to leaching at room temperature for 2 hours, and use mechanical stirring during the leaching process; Suction filtration to obtain a vanadium-containing solution; rinse and wash the leaching residue with deionized water for 3 times, and put the was...

Embodiment 2

[0035] 1) Crushing and grinding the high-calcium and high-phosphorus vanadium slag, grinding and sieving, and taking the 200-mesh sieve as vanadium slag powder for later use.

[0036] 2) Weigh C with an electronic balance 6 h 8 o 7 (99.5%) 21g and NaOH (97%) 8.4g, measure 16mL of HCl (36%) in a graduated cylinder, put them into a beaker with an appropriate amount of deionized water for dissolution, and finally use a volumetric flask to make up to 1L, the obtained buffer The pH of the solution was about 1.9.

[0037] 3) Add 100mL of C prepared in step 2) to the three-necked bottle 6 h 8 o 7 -NaOH-HCl buffer solution, the bottle mouth is plugged with a rubber stopper; put the three-necked bottle into a magnetic stirring water bath at room temperature, and then add 1g of the high-calcium and high-phosphorus vanadium slag powder obtained in step 1) to the three-necked bottle Add slag and finish timing, control leaching time is 60min; Adopt the mode of mechanical agitation in...

Embodiment 3

[0040] 1) Crushing and grinding the high-calcium and high-phosphorus vanadium slag, grinding and sieving, and taking the 200-mesh sieve as vanadium slag powder for later use.

[0041] 2) Measure glacial acetic acid C with a graduated cylinder 2 h 4 o 2 (99.5%) 114.5mL, then pour in the 500mL volumetric flask, finally make up to 500mL with deionized water, the pH value of the obtained weak acid solution is about 1.7, and the concentration of glacial acetic acid is 4mol / L.

[0042] 3) Add 100mL of the 4mol / L glacial acetic acid solution prepared in step 2) into the three-necked bottle, and plug the bottle mouth with a rubber stopper; place the three-necked bottle in a magnetic stirring water bath at room temperature, and then add 1g of the vanadium slag powder obtained in step 1); start timing after adding slag, and control the leaching time according to 60min; use mechanical stirring during the leaching process to speed up the leaching speed of phosphorus in the vanadium slag...

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PUM

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Abstract

The invention discloses a method for removing phosphorus and extracting vanadium from high-calcium high-phosphorus vanadium slag. The high-calcium high-phosphorus vanadium slag is broken and fine ground and is subject to leaching phosphorus removal treatment in a buffered solution or acid-deficient solution with the pH value ranging from 1.5 to 4.0, solid-solution separation is carried out, and phosphorus-contained filtrate and low-phosphorus vanadium slag are obtained; the low-phosphorus vanadium slag is dried and then subject to high-temperature roasting, and the high-temperature roasted low-phosphorus vanadium slag is subject to the water leaching working procedure, and a phosphorus-contained solution is obtained. The technical problems that the existing high-calcium high-phosphorus vanadium slag phosphorus removing and vanadium extracting process is large in phosphorus removing difficulty, poor in phosphorus removing effect, and high in phosphorus removing cost, in the phosphorus removing process, a large amount of vanadium is lost, the whole vanadium extracting technology process is complex, the impurity removal procedure difficulty is large, and the vanadium extracting cost is high are solved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical secondary resource reuse, and specifically relates to a method for removing phosphorus and extracting vanadium from high-calcium and high-phosphorus vanadium slag. Background technique [0002] There are a large amount of vanadium-titanium magnetite in my country. Vanadium-titanium magnetite is mainly obtained by blast furnace or other ironmaking processes firstly to obtain vanadium-containing molten iron, and then blowing oxygen into the converter to oxidize and enrich the vanadium in the molten iron into the slag to obtain semi-steel and vanadium slag, and then carry out the semi-steel steelmaking process; now the molten iron obtained by this method contains a large amount of phosphorus, and all the phosphorus in the molten iron enters the semi-steel steelmaking process, causing serious damage to the semi-steel smelting Dephosphorization burden, the semi-steel smelting process needs to use h...

Claims

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Application Information

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IPC IPC(8): C22B34/22C21B3/06
CPCC21B3/06C22B34/22Y02W30/50
Inventor 刁江周旺谢兵张权刘宇豪谭文奉顾攀
Owner CHONGQING UNIV
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