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Method for extracting vanadium from solid

A technology of solid and solid powder, applied in the field of vanadium extraction, can solve the problems of environmental hazards, equipment corrosion, high maintenance costs, unusability, etc., and achieve the effect of low vanadium extraction cost

Inactive Publication Date: 2019-08-30
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method also has the following problems: (1) the extraction rate of vanadium is not high, only 70%; (2) Fe in the water leaching residue 2 o 3 The content is as high as 38%, but it contains a large amount of sulfate, so it cannot be used as a raw material for blast furnace ironmaking; (3) Vanadium is impregnated with a high-concentration sulfuric acid solution at 95 ° C, and the equipment corrosion and maintenance costs are relatively high
(4) The chromium in the vanadium slag is hardly extracted, which makes the slag after vanadium extraction have environmental problems
Because these slags contain sodium or sulfur, they cannot be reused in blast furnaces, and are generally disposed of in the open air, which brings great harm to the surrounding environment.

Method used

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  • Method for extracting vanadium from solid
  • Method for extracting vanadium from solid

Examples

Experimental program
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Effect test

Embodiment 1

[0034] With 20 grams of dry vanadium slag powder (particle size is 48-120 micron, V 2 o 3 and Cr 2 o 3 Contents are respectively 13.80wt.% and 3.18wt.%) and 10 grams of calcium hydroxide (Ca(OH) 2 ) powder and 2 grams of water, and press it into 10 cylindrical blocks with a diameter of 15 mm and a height of 10 mm in a press under a pressure of 0.5 MPa. Take 10 block samples and put them into a high aluminum boat. Put the boat in a muffle furnace that has been preheated to 800°C. The furnaces of the muffle furnace are slightly opened. After keeping at this temperature for 2 hours, take out the boat and let it cool naturally in the air. It was found that the roasted block samples in the boat were hard and complete, and the high-alumina boat was not bonded at all. The weight of 10 block samples after roasting was 25.8 grams. Crush 10 roasted samples by hand, then pulverize them with a sample mill, transfer the powder into a 500mL glass beaker, add 250mL deionized water to th...

Embodiment 2

[0036] With 20 grams of dry vanadium slag powder (particle size is 48-120 micron, V 2 o 3 and Cr 2 o 3 Contents are respectively 13.80wt.% and 3.18wt.%) and 10 grams of calcium hydroxide (Ca(OH) 2 ) powder and mix them into a high aluminum boat. Put the boat in a muffle furnace that has been preheated to 800°C. The furnaces of the muffle furnace are slightly opened. After keeping at this temperature for 2 hours, take out the boat and let it cool naturally in the air. It was found that the boat was slightly agglomerated after roasting, but the high-alumina boat was basically not bonded. Crush the sintered sample manually, then pulverize it with a sample mill, transfer the powder into a 500mL glass beaker, add 250mL deionized water to the beaker, cover it, heat the aqueous solution to boil for 30 minutes, cool to 60°C, add 5mL concentrated acetic acid (99wt%), kept at 60°C for 60 minutes, cooled to room temperature and then filtered to obtain filter residue 2 and filtrate 2...

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Abstract

The invention discloses a method for extracting vanadium from a solid. The preparation method comprises the following steps of uniformly mixing dried vanadium-containing solid powder, calcium hydroxide powder and water to make a block, oxidizing and roasting the block sample at 600-900 DEG c in a high temperature furnace, crushing the block sample after roasting, transferring the crushed powder sample into a beaker, adding the water into the breaker, heating the water for nearly boiling for a period of time, then adding a small amount of acetic acid into solution to extract soluble vanadium ions in the powder, separating solid and liquid to obtain a vanadium-containing filtrate and a water leaching residue after vanadium removal. The vanadium-containing filtrate is used for preparing a V2O5 vanadium product through a precipitation method, and a precipitation filtrate is used as a water immersion liquid; and the water leaching residue subjected to vanadium slag vanadium removal not onlydoes not contain sodium nor sulfur, but also has the FeO content of 44 wt%, so that the water leaching residue can be used for blast furnace ironmaking, the vanadium extraction rate is more than 95%,15% higher than that of the traditional vanadium residue sodium roasting vanadium leaching rate of 80%, and 25% higher than the traditional method for adding limestone (CaCo3) vanadium residue sodiumroasting vanadium leaching rate of 70%. According to the method for extracting vanadium from the solid, zero emission of waste solid and waste liquid is realized; the method is green and efficient, and the vanadium extraction cost is low.

Description

technical field [0001] The invention relates to a method for extracting vanadium from solids, in particular to a method for extracting vanadium from iron and steel plant vanadium slag and vanadium-containing stone coal. Background technique [0002] At present, there are more than 70 kinds of vanadium-containing minerals, among which vanadium-titanium magnetite is the most typical, and 88% of vanadium comes from vanadium-titanium magnetite. The process of recovering vanadium from vanadium-titanium magnetite is to smelt vanadium-titanium magnetite into vanadium-containing molten iron in a blast furnace or electric furnace, add oxidant and coolant to the vanadium-containing molten iron in the first converter, and then blow oxygen into the converter After the vanadium in the molten iron is oxidized, it enters the steel slag to obtain vanadium-rich vanadium slag, and at the same time the molten iron is converted into carbon semi-steel; then the carbon semi-steel is poured into t...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B3/06C22B3/08C22B34/22
CPCC22B1/02C22B3/06C22B3/065C22B3/08C22B34/22Y02P10/20
Inventor 沈少波
Owner UNIV OF SCI & TECH BEIJING
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