Low-temperature normal-pressure leaching vanadium recovery method of vanadium-containing roasted clinker with ammonium bicarbonate solution

A technology of roasting clinker at low temperature and normal pressure, which is applied in the field of vanadium extraction, and can solve the problems of ammonium bicarbonate solution ammonium loss and impact on ammonium bicarbonate solution, etc., and achieve the effect of simple equipment and fast volatilization of ammonia gas

Inactive Publication Date: 2015-08-12
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0009] The key to solving the problem of ammonium loss in ammonium bicarbonate solution is to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] Put V 2 O 5 The clinker obtained by blank roasting the vanadium slag with a content of 10.5% in NH 4 + The vanadium was extracted by leaching in 100g / L ammonium bicarbonate solution, the leaching temperature was 45°C, the leaching solution-solid ratio was 10ml / g, and the leaching time was 3h to obtain vanadium extraction tailings and vanadium-containing leaching solution. The recovery rate of vanadium was 93.2%, and the loss rate of ammonium root was 6.9%.

Example Embodiment

[0024] Example 2

[0025] Put V 2 O 5 The clinker obtained after calcification and roasting of vanadium titanomagnetite with a content of 1.8% was 4 + 250g / L ammonium bicarbonate solution was leached to extract vanadium, the leaching temperature was 35℃, the leaching solution-solid ratio was 8ml / g, and the leaching time was 4h, to obtain vanadium extraction tailings and vanadium-containing leaching solution. The recovery rate of vanadium was 90.2%, and the loss rate of ammonium root was 4.6%.

Example Embodiment

[0026] Example 3

[0027] Put V 2 O 5 The clinker obtained by calcining the vanadium slag with a content of 14.7% by magnesium salt is in NH-containing 4 + 200g / L ammonium carbonate solution was leached to extract vanadium, the leaching temperature was 25°C, the leaching solution-solid ratio was 5ml / g, and the leaching time was 2h, to obtain vanadium extraction tailings and vanadium-containing leaching solution. The recovery rate of vanadium was 93.2%, and the loss rate of ammonium root was 3.7%.

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Abstract

The invention discloses a low-temperature normal-pressure leaching vanadium recovery method of a vanadium-containing roasted clinker with an ammonium bicarbonate solution. According to the low-temperature normal-pressure leaching vanadium recovery method, the clinker obtained via roasting of a vanadium-containing raw material is subjected to leaching vanadium extraction in the ammonium bicarbonate solution, vanadium enters into the solution in a form of ammonium vanadate, a leaching residue and a vanadium-containing solution are obtained via filtration, and an ammonium metavanadate product can be obtained from the vanadium-containing solution via ammonium vanadate cooling crystallization separation. Ammonium bicarbonate solution leaching is adopted; processes are simple; operation is convenient; vanadium recovery rate can be as high as 90 to 99%; vanadium clean and high efficiency extraction is realized; and no high-salinity ammonia nitrogen wastewater is generated.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction, in particular to a method for extracting vanadium by leaching vanadium-containing roasted clinker with ammonium bicarbonate solution at low temperature and normal pressure. Background technique [0002] Vanadium is widely used in iron and steel, chemical industry, aerospace, electronic technology and other fields, and is called "the monosodium glutamate of modern industry", of which more than 85% of vanadium is used in the iron and steel industry. [0003] The traditional vanadium extraction method for vanadium-titanium magnetite, vanadium slag, sodium vanadium slag, vanadium-containing steel slag, stone coal and other vanadium-containing raw materials is roasting-water leaching / acid leaching method. Vanadium leaching is the mainstream method for vanadium extraction. The basic principle of the sodium roasting process is based on Na 2 CO 3 , NaCl, Na 2 SO 4 Waiting for sodium salt...

Claims

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Application Information

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IPC IPC(8): C22B34/22C22B3/14
CPCY02P10/20
Inventor 杜浩郑诗礼刘彪李猛王少娜张洋张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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