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Method for extracting vanadium from vanadium slag by using sintering process red mud as additive

A sintering method and additive technology, which is applied in the field of vanadium extraction from vanadium slag, can solve the problems of no vanadium slag extraction vanadium roasting additive, etc., and achieve the effects of resource utilization, convenient operation, and reduced roasting cost

Active Publication Date: 2022-01-21
PANGANG GROUP RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen from the review that although the sintering red mud has been applied in many aspects in the prior art, there is no use of the sintering red mud to extract vanadium and roast the vanadium slag. Reports about additives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Take 100g fine powder vanadium slag and mix with 21.25g sintering process red mud, n(CaO) / n(V 2 o 5 ) = 2.0, then add the mixed material to the muffle furnace for high-temperature roasting, control the high-temperature roasting temperature to 840°C, and hold the time for 180 minutes; after the roasted clinker is cooled, crush the clinker until it passes through a 160-mesh sieve, and then crush The final clinker is 120.10g, then the broken clinker is added to 480ml of water, and the sulfuric acid with a mass concentration of 30% is added to maintain the pH value at 2.5 during leaching, the liquid-solid ratio of leaching is 4ml / g, and the leaching temperature is kept at 40°C. The leaching time is controlled to be 80 minutes; vanadium-containing leaching solution and vanadium extraction tailings are obtained after filtration.

[0051] Detection of V in tailings of vanadium extraction 2 o 5 The content of vanadium is 1.20%, the dry weight of vanadium extraction tailings ...

Embodiment 2

[0053] Take 200g fine powder vanadium slag and mix with 50.08g sintering process red mud, n(CaO) / n(V 2 o 5 ) = 2.3, then add the mixed material to the muffle furnace for high-temperature roasting, control the high-temperature roasting temperature to 900°C, and hold the time for 100 minutes; after the roasted clinker is cooled, crush the clinker until it passes through a 160-mesh sieve. The final clinker is 246.56g, then the broken clinker is added to 740ml of water, and the sulfuric acid with a mass concentration of 70% is added to maintain the pH value at 2.8 during leaching, the liquid-solid ratio of leaching is 3ml / g, and the leaching temperature is kept at 50°C. The leaching time is controlled to be 40 minutes; vanadium-containing leaching solution and vanadium extraction tailings are obtained after filtration.

[0054] Detection of V in tailings of vanadium extraction 2 o 5 The content of vanadium is 1.32%, the dry weight of vanadium extraction tailings is 245.33g, and...

Embodiment 3

[0056] Take 300g fine powder vanadium slag and mix with 86.48g sintering process red mud, n(CaO) / n(V 2 o 5 ) = 2.6, then add the mixed material to the muffle furnace for high-temperature roasting, control the high-temperature roasting temperature to 870°C, and hold the time for 140 minutes; after the roasted clinker is cooled, crush the clinker until it passes through a 160-mesh sieve, and then crush it. The final clinker is 380.25g, then the broken clinker is added to 1900ml of water, and the sulfuric acid with a mass concentration of 50% is added to maintain the pH value at 3.5 during leaching, the liquid-solid ratio of leaching is 5ml / g, and the leaching temperature is kept at 60°C. The leaching time is controlled to be 60 minutes; vanadium-containing leaching solution and vanadium extraction tailings are obtained after filtration.

[0057] Detection of V in tailings of vanadium extraction 2 o 5 The content of vanadium is 1.16%, the dry weight of vanadium extraction tail...

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Abstract

The invention relates to the technical field of comprehensive utilization of vanadium resources and red mud solid wastes, and discloses a method for extracting vanadium from vanadium slag by taking sintering process red mud as an additive. The method comprises the following steps: (1) mixing dried and crushed sintered red mud with fine powder vanadium slag, and then roasting at high temperature to obtain clinker; and (2) the clinker is crushed and then mixed with water, then the pH value of the obtained mixed solution is adjusted to be acidic for leaching, and vanadium-containing leachate and vanadium extraction tailings are obtained after filtering. The sintering method red mud is used as a roasting additive to extract vanadium from the vanadium slag, the process is simple, waste utilization and cost reduction can be achieved, good social benefits and economic benefits are achieved, and meanwhile the leaching rate of vanadium is high. Vanadium can be further extracted from the vanadium-containing leachate to obtain a vanadium oxide product; and vanadium extraction tailings can be returned to a blast furnace for reuse after being subjected to desulfurization and dephosphorization treatment.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of vanadium resources and red mud solid waste, in particular to a method for extracting vanadium from vanadium slag using sintering red mud as an additive. Background technique [0002] The vanadium extraction process from vanadium slag mainly includes sodium roasting process and calcification roasting process, that is, using sodium salt or calcium salt as an additive, roasting at high temperature, and then water or acid leaching to obtain vanadium-containing leachate and vanadium extraction tailings. In the vanadium slag sodium roasting process, the liquid treatment process after vanadium precipitation is complex and the production cost is high, and the vanadium chromium reduction slag and the mixture of sodium sulfate and ammonium sulfate containing vanadium and chromium are hazardous wastes. In the calcification roasting process, the tailings after acid leaching do not contain...

Claims

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Application Information

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IPC IPC(8): C22B34/22C22B7/04C22B1/02
CPCC22B34/22C22B7/001C22B7/007C22B7/04C22B1/02Y02P10/20
Inventor 蒋霖伍珍秀伍金树
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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