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Method for enriching vanadium from vanadium-containing steel slag

A steel slag and enrichment technology, applied in the field of vanadium enrichment, can solve the problems of high impurities in vanadium-containing steel slag, pollute the environment, and high cost, and achieve the effects of high vanadium enrichment, simple operation, and low cost

Active Publication Date: 2019-01-29
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses high temperature (1500°C-1550°C) for melting treatment, consumes a lot of energy, costs high, pollutes the environment, and cannot solve the problem of high impurities in vanadium-containing steel slag

Method used

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  • Method for enriching vanadium from vanadium-containing steel slag
  • Method for enriching vanadium from vanadium-containing steel slag
  • Method for enriching vanadium from vanadium-containing steel slag

Examples

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Embodiment 1

[0038] like figure 1 As shown, Embodiment 1 provides a preferred method for enriching vanadium from vanadium-containing steel slag, wherein the method for enriching vanadium from vanadium-containing steel slag comprises the following steps:

[0039] S1. Grinding: The vanadium-containing steel slag is crushed to particles with a particle size of less than or equal to 20mm, and then uniformly ball-milled to pass a 100-mesh sieve.

[0040] S2, enrichment: Weigh 40g of vanadium-containing steel slag, add dilute hydrochloric acid with a concentration of 3 mol / L and a liquid-solid ratio of dilute hydrochloric acid to vanadium-containing steel slag of 2:1, use a water bath heating device to magnetically stir at 30 ° C, and the leaching time For 120min, a mixed slurry was obtained.

[0041] Wherein, the preparation process of dilute hydrochloric acid with a concentration of 3mol / L is as follows: firstly take 60ml of distilled water, then add 20ml of high-grade pure (mass fraction of ...

Embodiment 2-9

[0049] Similar to the method steps for enriching vanadium from vanadium-containing steel slag described in Example 1, Examples 2-9 are by adjusting the grinding particle size in step S1, the quality of vanadium-containing steel slag in step S2, and the concentration of dilute hydrochloric acid. , Dilute hydrochloric acid and vanadium-containing steel slag liquid-solid ratio, leaching temperature, leaching time and other process parameters to achieve. The specific process conditions of Examples 2-9 are shown in Table 3 below.

[0050] Table 3: the process condition situation of embodiment 2-9

[0051]

[0052]

[0053] Elemental analysis was performed on the vanadium-rich slag in Examples 2-9 by inductively coupled plasma emission spectrometer (referred to as ICP spectrometer), and the content of each chemical composition in the vanadium-rich slag was obtained by calculation. According to the calculation formula of the enrichment ratio of vanadium in the vanadium-contain...

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Abstract

The invention discloses a method for enriching vanadium from vanadium-containing steel slag, and relates to the technical field of hydrometallurgy. It includes the following steps: S1. Grinding: crush the vanadium-containing steel slag, and then ball mill and screen it; S2. Enrichment: use dilute hydrochloric acid to stir and leach the vanadium-containing steel slag obtained in step S1 to obtain a mixed slurry; S3. Solid-liquid separation. : Perform solid-liquid separation of the mixed slurry in step S2, and wash the solid slag to obtain vanadium-rich slag and eluate. The method of the invention is simple to operate, has low energy consumption, low cost, is green and environmentally friendly, can effectively reduce the content of Ca, Mg, Fe, Mn and other impurities in vanadium-containing steel slag, improves the grade of vanadium, and facilitates the separation of vanadium from vanadium-containing steel slag. and extraction, greatly increasing the yield of vanadium.

Description

technical field [0001] The invention relates to a method for enriching vanadium from vanadium-containing steel slag, and relates to the technical field of hydrometallurgy. Background technique [0002] Vanadium-containing steel slag is a by-product of the vanadium-titanium magnetite smelting process. There are two ways to produce it: one is that the residual vanadium in the semi-steel is oxidized into the slag after steelmaking; the other is the vanadium slag that has not been blown. The slag body obtained by the direct steelmaking of molten iron. The characteristics of vanadium-containing steel slag are as follows: (1) The content of impurities such as Ca, Mg, Fe, Mn is high, the crystallization is perfect, the texture is dense, and the dissociation degree is poor; (2) The composition is complex and fluctuates greatly; (3) Vanadium The content is lower (with V 2 O 5 The content is calculated as 2%-4%). [0003] At present, there are two main processes for extracting van...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/22C21B3/06C22B7/04
CPCC21B3/06C22B7/04C22B34/22Y02P10/20Y02W30/50
Inventor 高明磊薛向欣杨合李兰杰
Owner NORTHEASTERN UNIV LIAONING
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