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Comprehensive utilization method for vanadium slag

A technology of vanadium slag and vanadium pentoxide, which is applied in the field of metallurgy, can solve problems such as high pollution, low efficiency, and unsafety, and achieve the effects of high purity, simple process, and low cost

Inactive Publication Date: 2011-07-27
NORTHEASTERN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Purpose of the invention: the present invention provides a method for comprehensive utilization of vanadium slag, the purpose of which is to solve the problems of high pollution, low efficiency and unsafety in previous methods for extracting vanadium from vanadium slag; the present invention obtains pentoxide from vanadium slag Vanadium and iron oxide

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  • Comprehensive utilization method for vanadium slag
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Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Crushing and grinding: the vanadium slag containing 29% by weight of iron and 1.0% by weight of vanadium is crushed and ground to obtain a powder with a diameter of 80 μm;

[0036] (2) Mixing: According to the weight ratio of vanadium slag powder: ammonium sulfate: potassium ammonium sulfate = 1:7:3, weigh the raw materials, and mix the vanadium slag powder with ammonium sulfate and potassium ammonium sulfate evenly;

[0037] (3) Melting: raise the temperature of the above-mentioned mixed material to 300°C and keep it warm for 15 minutes to obtain massive solid and ammonia gas;

[0038] (4) Dissolving and filtering: the block solid obtained above is dissolved in an aqueous solution of EDTA with a concentration of 0.15mol / L, and the molar ratio of EDTA to iron is 0.6:1, and then filtered to obtain the filtrate and residue, the residue is iron cement , the percentage of filtrate water-soluble vanadium accounting for the total weight of vanadium in the vanadium slag is...

Embodiment 2

[0043] (1) Crushing and grinding: the vanadium slag containing 20% ​​by weight of iron and 3.0% by weight of vanadium is crushed and ground to obtain a powder with a diameter of 70 μm;

[0044] (2) Mixing: According to the weight ratio of vanadium slag powder: ammonium sulfate: ammonium potassium sulfate=1:5:5, weigh the raw materials, and mix the vanadium slag powder with ammonium sulfate and ammonium potassium sulfate evenly;

[0045] (3) Melting: raise the temperature of the above-mentioned mixed material to 270°C and keep it warm for 30 minutes to obtain massive solid and ammonia gas;

[0046] (4) Dissolving and filtering: Dissolve the block solid obtained above in an aqueous solution of EDTA with a concentration of 0.18mol / L, and the molar ratio of EDTA to iron is 1.1:1, then filter to obtain the filtrate and residue, the residue is iron cement , the percentage of filtrate water-soluble vanadium accounting for the total weight of vanadium in the vanadium slag is 96%, and ...

Embodiment 3

[0051] (1) Crushing and grinding: the vanadium slag containing 30% by weight of iron and 0.8% by weight of vanadium is crushed and ground to obtain a powder with a diameter of 100 μm;

[0052] (2) Mixing: According to the weight ratio of vanadium slag powder: ammonium sulfate: potassium ammonium sulfate = 1:12:2, weigh the raw materials, and mix the vanadium slag powder with ammonium sulfate and potassium ammonium sulfate evenly;

[0053] (3) Melting: raise the temperature of the above-mentioned mixed material to 400°C and keep it warm for 10 minutes to obtain massive solid and ammonia gas;

[0054] (4) Dissolving and filtering: Dissolve the block solid obtained above in an aqueous solution of EDTA with a concentration of 0.1mol / L, and the molar ratio of EDTA to iron is 0.8:1, then filter to obtain the filtrate and residue, the residue is iron cement , the percentage of filtrate water-soluble vanadium accounting for the total weight of vanadium in the vanadium slag is 93%, and...

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Abstract

The invention provides a comprehensive utilization method for vanadium slag, which is characterized by comprising the following steps of: (1) crushing and grinding; (2) mixing materials; (3) melting; (4) dissolving and filtering; (5) settling vanadium; and (6) preparing ferric oxide. Raw materials are wide in sources, the vanadium slag is utilized integrally at one time, immediate products are recycled, the consumption of the raw materials and water is reduced, secondary pollution is avoided, the process is simple, operating conditions are mild, the cost is low, the added value of the productis high, and the economic benefit is high. Iron is effectively removed in the process of producing high-purity vanadium pentoxide, resources such as vanadium and iron are reasonably utilized, and theinvention provides a new way for comprehensively utilizing the vanadium slag.

Description

technical field [0001] The invention relates to a comprehensive utilization method of vanadium slag, which belongs to the technical field of metallurgy. Background technique [0002] South Africa, Russia and China are major vanadium producers and exporters in the world, while the European Union, Japan and the United States are major importers. It is predicted that in the next 10 years, the world can provide a market space of 100,000 tons of vanadium (equivalent to vanadium pentoxide) per year. It is estimated that from 2011 to 2020, the demand for vanadium in the world will maintain a continuous growth trend, with an annual growth rate of about 4.3%. Vanadium usually exists in the form of vanadium-containing minerals or similar substances, which prevents vanadium from obtaining vanadium concentrate through mechanical beneficiation like copper, lead, zinc and other non-ferrous metals. Therefore, in the existing vanadium extraction process, the processed ore and / Or the grad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04
CPCY02P10/20
Inventor 薛向欣张悦赵京京杨合
Owner NORTHEASTERN UNIV
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