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Method for vanadium tailings sodium removal after sodium salt roasting of vanadium titano-magnetite through dilute acid dump leaching

A technology for extracting vanadium-titanium magnetite and vanadium tailings, which is applied in the field of hydrometallurgy, can solve the problem of high process cost, and achieve the effect of high-efficiency removal

Inactive Publication Date: 2019-01-11
BEIJING ZHONGKAIHONGDE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this process, the vanadium extraction tailings need to be reacted in an acid kettle, and the obtained tailings washing water needs to be treated separately. For the tailings that have been stockpiled, the cost of this process is still relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment uses vanadium-titanium magnetite sodium roasting to extract vanadium tailings containing Fe 2 o 3 70.02%, containing Na 2 O 1.02%.

[0032] (1) The vanadium-titanium magnetite sodium roasting and vanadium extraction tailings are piled up, and the pile height is 4m;

[0033] (2) the dilute sulfuric acid solution that the mass concentration is 0.2wt% is evenly distributed on the heap by spraying, and the spraying intensity is 3L / (m 2 h), then collect the leachate from the heap leaching solution collection pipe and enter it into the liquid collection tank, add acid to adjust the acidity and then return to the tailings pile for solution circulation leaching;

[0034] (3) After heap leaching for 20 days, the vanadium-extracting tailings were simply washed with water, the volume-to-mass ratio of the washing process water to the vanadium-extracting tailings was 0.5:1, and the washing temperature was normal temperature to obtain a sodium content of 0.17% (in ...

Embodiment 2

[0036] This embodiment uses vanadium-titanium magnetite sodium roasting to extract vanadium tailings containing Fe 2 o 3 65.26%, containing Na 2 O 2.13%.

[0037] (1) The vanadium-titanium magnetite sodium roasting and vanadium extraction tailings are piled up, and the pile height is 12m;

[0038] (2) the dilute sulfuric acid solution that the mass concentration is 1wt% is evenly distributed on the heap with drip irrigation, and the intensity is 20L / (m 2 h), then collect the leachate from the heap leaching solution collection pipe and enter it into the liquid collection tank, add acid to adjust the acidity and then return to the tailings pile for solution circulation leaching;

[0039] (3) After heap leaching for 30 days, the vanadium extraction tailings were simply washed with water, the volume to mass ratio of the washing process water to the vanadium extraction tailings was 2:1, and the washing temperature was 80° C. to obtain a sodium content of 0.15% (in terms of Na 2...

Embodiment 3

[0041] This embodiment uses vanadium-titanium magnetite sodium roasting to extract vanadium tailings containing Fe 2 o 3 69.87%, containing Na 2 O 1.56%.

[0042] (1) The vanadium-titanium magnetite sodium roasting and vanadium extraction tailings are piled up, and the pile height is 8m;

[0043] (2) the dilute sulfuric acid solution that mass concentration is 2wt% is evenly distributed on the heap with the drip irrigation method, and intensity is 8L / (m 2 h), then collect the leachate from the heap leaching solution collection pipe and enter it into the liquid collection tank, add acid to adjust the acidity and then return to the tailings pile for solution circulation leaching;

[0044](3) After heap leaching for 40 days, the vanadium extraction tailings were simply washed with water, the volume to mass ratio of the washing process water to the vanadium extraction tailings was 1:1, the washing temperature was 40°C, and the sodium content was 0.14% (as Na 2 O) tailings are ...

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PUM

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Abstract

The invention belongs to the technical field of hydrometallurgy, and relates to a method for vanadium tailings sodium removal after sodium salt roasting of vanadium titano-magnetite through dilute acid dump leaching. The method comprises following steps that firstly, vanadium tailings obtained after sodium salt roasting of vanadium titano-magnetite are subjected to heap construction; secondly, a dilute acid solution is distributed in a heap in the first step, a leaching agent is collected, dilute acid is added into the leaching agent, after the concentration is adjusted to the constant concentration, then, the leaching agent is returned to the tailings heap, solution circular leaching is carried out, and the tailings are obtained; and thirdly, the tailings obtained through heap leaching inthe second step are washed, and low sodium vanadium tailings are obtained. The method is easy and convenient to operate, cost is low, sodium in the vanadium tailings obtained after sodium salt roasting of vanadium titano-magnetite is efficiently removed, and after treatment, in the finally obtained low-sodium vanadium tailings, the content of sodium is below 0.2% as Na2O.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and relates to a method for dilute acid heap leaching of vanadium-titanium magnetite, sodium roasting, vanadium extraction and tailing slag removal. Background technique [0002] There are large reserves of vanadium-titanium magnetite in the world, concentrated in a few countries and regions, including: Russia, the United States, China, South Africa, Norway, Sweden, Finland, etc., and concentrated in South Africa, North America and other regions. From the perspective of reserves, South Africa accounts for 46%, Russia accounts for 23.6%, the United States accounts for 13.1%, China accounts for 11.6%, and the sum of other countries is less than 6%. [0003] In South Africa and other countries, the grade of vanadium in vanadium magnetite is relatively high, with an average grade of about 1.5%. However, the grade of vanadium in my country's vanadium-titanium magnetite is relatively low, belo...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B3/06
CPCC22B1/02C22B3/06
Inventor 王少娜杜浩郑诗礼关永祥廖章辉
Owner BEIJING ZHONGKAIHONGDE TECH
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