Recycling and Utilization Method of Calcified Vanadium Extraction Tailings

A technology for extracting vanadium tailings and vanadium slag, which is applied in the field of recycling of calcification vanadium extraction tailings, can solve the problems of waste of resources, high vanadium content in calcification vanadium extraction tailings, etc., to improve production efficiency, increase vanadium concentration, and avoid resources the wasteful effect of

Active Publication Date: 2021-04-06
PANGANG GROUP RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a recycling method for calcified vanadium extraction tailings to solve the problem of excessive vanadium content in the calcification vanadium extraction tailings and waste of resources

Method used

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  • Recycling and Utilization Method of Calcified Vanadium Extraction Tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1 adopts the inventive method to recycle and utilize calcification to extract vanadium tailings

[0061] Add 750ml of 2% w / w sulfuric acid aqueous solution to 500g dry calcified vanadium extraction tailings (primary tailings), stir and react for 5min at 34°C, separate and wash liquid and solid to obtain secondary tailings and secondary leaching solution, and add to secondary Slowly add 52g of vanadium slag calcified roasting clinker (particle size ≤ 0.125mm) to the primary leachate, adjust the pH to 1.5, stir and react for 10 minutes, filter to obtain the primary impurity removal slag and primary impurity removal liquid; then slowly add concentration It is 25% w / w ammonia water, adjust the pH to 3.1, stir and react for 7 minutes, and filter to obtain the secondary impurity removal liquid; mix the secondary impurity removal liquid with the primary filtered washing liquid, and use it as the mother liquid for vanadium slag calcification and roasting clinker Prim...

Embodiment 2

[0063] Embodiment 2 adopts the inventive method to recycle and utilize calcification to extract vanadium tailings

[0064] Add 750ml of 2% w / w aqueous sulfuric acid solution to 500g of dry primary impurities removal slag (obtained according to Example 1), stir and react at 16°C for 10min, liquid-solid separation and washing, to obtain secondary tailings and secondary leaching solution, Slowly add 45g of vanadium slag calcified roasting clinker (particle size ≤ 0.125mm) to the secondary leaching solution, adjust the pH to 1.6, stir and react for 10 minutes, and filter to obtain a primary impurity removal solution; then slowly add a concentration of 25% to the primary impurity removal solution w / w ammonia water, adjust the pH to 3.0, stir and react for 10 minutes, and filter to obtain the secondary impurity removal liquid; mix the secondary impurity removal liquid with the primary filtered washing liquid, and use it as the mother liquor for the primary leaching of vanadium slag c...

Embodiment 3

[0066] Embodiment 3 adopts the inventive method to recycle and utilize calcification to extract vanadium tailings

[0067] Add 500ml of 2.5% w / w sulfuric acid aqueous solution to 500g dry calcified vanadium extraction tailings (primary tailings), stir and react for 5min at 65°C, separate and wash liquid and solid to obtain secondary tailings and secondary leaching solution, and send to secondary Slowly add 63g of calcified roasted clinker (particle size ≤ 0.125mm) to the secondary leaching solution, adjust the pH to 1.5, stir and react for 5 minutes, and filter to obtain the primary impurity-removing liquid; then slowly add the concentration of 25% w / w Ammonia water, adjust the pH to 3.0, stir and react for 5 minutes, and filter to obtain a secondary impurity removal liquid; mix the secondary impurity removal liquid with the primary filtered washing liquid, and use it as the mother liquid for the primary leaching of vanadium slag calcification roasting clinker.

[0068] Take v...

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Abstract

The invention relates to a recycling method of calcified vanadium extraction tailings, and belongs to the field of vanadium oxide preparation. What the present invention aims to solve is the problem that the vanadium content in the tailings for vanadium extraction by calcification is too high, resulting in waste of resources. Place in 1%-4% w / w sulfuric acid aqueous solution for acid leaching, use vanadium slag to calcify and roast the clinker to adjust the pH of the leachate to 1.0-2.0, separate the solid and liquid, collect the liquid phase, and obtain the impurity-removed leachate, use Primary leaching of calcified roasted clinker from vanadium slag. The invention can not only fully extract the vanadium in the tailing slag, avoid waste of resources, but also help to increase the vanadium concentration of the leaching solution, so as to achieve the purpose of enriching vanadium.

Description

technical field [0001] The invention relates to a recycling method of calcified vanadium extraction tailings, and belongs to the field of vanadium oxide preparation. Background technique [0002] After vanadium slag is calcified and roasted, the dissolution rate of vanadium can reach about 88% in the laboratory leaching temperature of 50-60°C and leaching pH value of 2.8-3.2, but the dissolution and leaching rate of vanadium in the on-site production process is significantly lower than that in the laboratory The main reasons are as follows: firstly, the on-site leaching temperature is difficult to meet the process requirements. First, when there is no heat preservation measure on site, the control of leaching temperature, leaching liquid-solid ratio and sulfuric acid concentration can only be determined by experience and trial and error. Second, the actual production The process is affected by factors such as roasting calcium-vanadium ratio, roasting temperature, and seasona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B34/22
CPCC22B7/007C22B7/04C22B34/22Y02P10/20
Inventor 何文艺申彪叶露陈燕
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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