Recycling and Utilization of Tailing Slag from Vanadium Extraction by Calcium Method

A technology for extracting vanadium tailings and calcium method, which is applied in the solid-liquid separation process, recycling of calcium method for vanadium extraction tailings, and mineral processing, and can solve the problems of difficult-to-return sintering applications and high sulfur content in calcium-based vanadium extraction tailings. Achieve efficient utilization, reduce sulfur content, and reduce costs

Active Publication Date: 2019-03-05
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of high sulfur content in tailings of vanadium extraction by calcium method and difficulty in large-scale back-sintering application, the purpose of this invention is to provide a recycling method for tailings of vanadium extraction by calcium method

Method used

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  • Recycling and Utilization of Tailing Slag from Vanadium Extraction by Calcium Method

Examples

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Effect test

Embodiment 1

[0040] Embodiment 1 Using the technical scheme of the present invention to reclaim the tailings of vanadium extraction by calcium method

[0041] A method for utilizing the tailings of vanadium extraction by calcium method, the specific steps are:

[0042]Weigh 50g of the above-mentioned vanadium extraction tailings by the calcium method and place it in the XFD-1.5 single-cell flotation cell, add 1L of water, stir evenly; add 10ml of alcohol, 3 Stir with air at a rate of 1 / h for 2 minutes, add 0.1 g of sodium oleate, continue stirring for 3 minutes, float until the foam no longer increases, filter and dry the obtained foam and pulp respectively to obtain gypsum and iron-rich materials. The yield of the obtained gypsum is 11.6%, the gypsum contains 13.8% sulfur, and the sulfur yield is 72%; the iron-rich material contains 0.7% sulfur, 34.4% iron, and the iron yield is greater than 90%.

Embodiment 2

[0043] Embodiment 2 Using the technical scheme of the present invention to reclaim the tailings of vanadium extraction by calcium method

[0044] A method for utilizing the tailings of vanadium extraction by calcium method, the specific steps are:

[0045] Weigh 100g of the above-mentioned vanadium extraction tailings by the calcium method and place it in the XFD-1.5 single-trough flotation cell, add 1L of water, stir evenly; add 5ml of water glass, and use 5m 3 Add air at a rate of 1-5min and stir for 1-5min, add 0.1g sodium lauryl sulfate, continue to stir for 5min, float until the foam no longer increases, filter and dry the obtained concentrate foam and tailings slurry respectively to obtain Gypsum and iron-rich materials. The yield of the obtained gypsum is 15.6%, the gypsum contains 12.7% of sulfur, and the sulfur yield is 69%; the iron-rich material contains 1.0% of sulfur, 31.1% of iron, and the iron yield is greater than 88%.

Embodiment 3

[0046] Embodiment 3 Using the technical scheme of the present invention to reclaim the tailings of vanadium extraction by calcium method

[0047] A method for utilizing the tailings of vanadium extraction by calcium method, the specific steps are:

[0048] Weigh 100g of the above-mentioned vanadium extraction tailings by the calcium method and place it in the XFD-1.5 single-cell flotation cell, add 1L of water, and use 2m 3 The speed of / h feeds air and stirs 2min, adjusts pH to 9.0 with sulfuric acid, calcium hydroxide; Add 0.1g sodium dodecylbenzene sulfonate, continue stirring 2min, flotation until foam no longer increases, respectively to the refined The ore foam and tailings slurry are filtered and dried to obtain gypsum and iron-rich materials. The yield of the obtained gypsum is 22.6%, the gypsum contains 16.4% sulfur, and the sulfur yield is 93.9%; the iron-rich material contains 0.3% sulfur, 34.1% iron, and the iron yield is 93.8%.

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Abstract

The invention belongs to the field of chemical industry and relates to an ore dressing and solid-liquid separation technology, in particular to a recycling method for calcium process vanadium extracting tailings. On account of the problem that the calcium process vanadium extracting tailings are high in sulphur content and difficult to be massively applied to sintering again, the invention provides the recycling method for the calcium process vanadium extracting tailings. The vanadium extracting tailings are prepared into ore pulp, a proper collecting agent is added for carrying out foam flotation, chemicals, such as a dispersing agent, a regulator and a foaming agent, are further selectively added during flotation, foamed gypsum and remaining ore pulp are obtained, and filtering and drying are separately carried out for obtaining gypsum and an iron-rich material. The gypsum can be used for building materials or further enriched for producing high-quality gypsum. The iron-rich material of which the sulphur content is greatly reduced can be massively used for sintering again without increasing desulfuration cost, and can also be further used as a steelmaking slag former. Therefore, the recycling of the calcium process vanadium extracting tailings is realized.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to ore dressing and solid-liquid separation technology, in particular to a method for recycling tailings of vanadium extraction by calcium method. Background technique [0002] At present, there are mainly two kinds of vanadium extraction from vanadium slag in China: sodium method and calcium method. In comparison, the calcium method has the advantages of low cost and less pollution. Calcium vanadium extraction tailings is the solid waste obtained from vanadium slag after the calcium vanadium extraction process. It contains about 30% iron, and also contains calcium, titanium, silicon and other elements. It has certain utilization value, but the high sulfur content inhibits its use. Return to factory for use. However, heavy metals such as vanadium and chromium exceed the standard and require special treatment when they are discharged, which not only increases costs, but also causes wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/02B03D101/02B03D101/04B03D101/06
CPCB03D1/02B03D2201/02B03D2201/04B03D2201/06
Inventor 曾冠武郝建璋
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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