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Method for deeply extracting vanadium by utilizing alkaline tailings

A tailings and alkaline technology, which is applied in the field of deep vanadium extraction using alkaline tailings, can solve the problems of complex process, high energy consumption, and recovery outweighing the loss, and achieve the effects of simple process, short process and cost saving.

Inactive Publication Date: 2019-05-31
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing vanadium extraction tailings treatment technology is difficult to realize the full utilization of valuable substances in the tailings at the same time, and there are common problems such as complex process and high energy consumption, which leads to the loss outweighing the recovery.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Ingredients: Mix the alkaline tailings (Na is 10%, V is 0.8%, and moisture is 25%) with vanadium-containing materials (V is 1.5%) at a mass ratio of 0.1:1 to obtain a mixture ;

[0034] (2) Roasting: Place the mixed material in a muffle furnace and roast at 820°C for 1.5 hours to obtain roasted clinker;

[0035] (3) Leaching: leaching the roasted clinker with 85°C hot water, and filtering to obtain a vanadium-containing leaching solution;

[0036] (4) Washing: Wash the leaching residue with hot water at 80°C to obtain the vanadium extraction tailings, and the obtained washing water is returned to the vanadium-containing leaching solution.

[0037] After testing, the obtained vanadium extraction tailings contained vanadium at 0.55 wt%, and the leaching rate of vanadium was 88.7%.

Embodiment 2

[0039] (1) Ingredients: Mix the alkaline tailings (12% for Na, 0.9% for V, and 22% for water) with vanadium-containing materials (V for 1.8%) at a mass ratio of 0.2:1 to obtain a mixture ;

[0040] (2) Roasting: Place the mixture in a muffle furnace and roast at 800°C for 1 hour to obtain roasted clinker;

[0041] (3) Leaching: leaching the roasted clinker with hot water at 90°C, and filtering to obtain a vanadium-containing leaching solution;

[0042] (4) Washing: Wash the leaching residue with hot water at 85°C to obtain the vanadium extraction tailings, and the obtained washing water is returned to the vanadium-containing leaching solution.

[0043] After testing, the vanadium extraction tailings contained 0.52wt% vanadium, and the vanadium leaching rate was 90%.

Embodiment 3

[0045] (1) Ingredients: Mix the alkaline tailings (Na is 8%, V is 0.75%, and the water content is 20%) and vanadium-containing materials (V is 1.2%) at a mass ratio of 0.15:1 to obtain a mixture ;

[0046] (2) Roasting: Place the mixture in a muffle furnace and roast for 0.5h at 750°C to obtain roasted clinker;

[0047] (3) Leaching: leaching the roasted clinker with 95°C hot water, and filtering to obtain a vanadium-containing leaching solution;

[0048] (4) Washing: Wash the leaching residue with hot water at 80°C to obtain the vanadium extraction tailings, and the obtained washing water is returned to the vanadium-containing leaching solution.

[0049] After testing, the vanadium extraction tailings contained 0.58 wt% vanadium, and the leaching rate of vanadium was 86.1%.

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Abstract

The invention relates to a method for deeply extracting vanadium by utilizing an alkalinetailings. The method comprises the steps of mixing the alkaline tailings and a vanadium-containing material, and then roasting an obtained mixture; and leaching the roasted clinker through water so as to obtain a vanadium-containing solution and a leaching residue. According to the method for deeply extractingthe vanadium by utilizing the alkaline tailings provided by the invention, the alkaline extracted vanadium tailings is directly used as a raw material and is mixed with the vanadium-containing material so as to carry out reaction, so that compared with a traditional tailings treatment technology, the method provided by the invention has remarkable advantages. The method for deeply extracting thevanadium by utilizing the alkaline tailings is simple in process and short in flow, sodium slat in the alkaline extracted vanadium tailings is recycled, meanwhile, a vanadium element in the extractedvanadium tailings is high-efficiently recovered, vanadium is high-efficiently cleaned and utilized, the cost is reduced favorably, and the method has favorable economic benefit and application prospect.

Description

Technical field [0001] The invention belongs to the technical field of resource utilization and environmental protection, and specifically relates to a method for deeply extracting vanadium by using alkaline tailings. Background technique [0002] Vanadium is an important non-ferrous metal. Vanadium and its alloys are widely used in metallurgy, petrochemical, national defense and other technical fields. At present, in the smelting process of vanadium-titanium magnetite, vanadium slag mostly adopts rotary kiln sodium roasting process. After vanadium slag extracts vanadium, the content of vanadium and sodium in the waste slag (that is, the tailings of vanadium extraction) is relatively high. These vanadium extraction tailings are usually directly discharged and piled up like a mountain, which not only causes a waste of valuable resources in the tailings, but also the high alkali and heavy metals in the tailings will have a serious impact on the pollution environment. [0003] CN1023...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B1/02C22B7/00
CPCY02P10/20
Inventor 周冰晶李兰杰高明磊
Owner HEBEI IRON AND STEEL
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