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Application method of defoaming agent to beneficiation and tailings discarding of stone coal vanadium ore and hydrometallurgy

A technology of hydrometallurgy and application methods, applied in wet separation, chemical instruments and methods, flotation and other directions, can solve the problems of unstable extraction, large loss rate of tail throwing, large ratio of leaching liquid to solid, etc., and achieve good defoaming. Effect, low toxicity of agent, good leaching effect

Active Publication Date: 2015-03-25
西安西北有色地质研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used beneficiation treatment method for stone coal-type vanadium ore is basically gravity separation. The grade of vanadium pentoxide in the concentrate can be increased to more than 1.5%, but it will cause a large loss rate of tailings.
However, the Chinese patent 200910023414.5 patent obtained by the applicant of this patent uses the combined process of flotation and re-election-flotation, and the vanadium concentrate produced by high temperature and stirring in the hydrometallurgical leaching process is aimed at the vanadium concentrate enriched by beneficiation flotation and throwing tailings. Foam is difficult to eliminate, leached liquid-solid ratio is relatively large, etc., it is necessary to find a defoamer and its application method that can overcome the above shortcomings and make the process smooth
Other defoamers have problems such as large dosage, high cost, high toxicity, and unstable subsequent extraction.

Method used

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  • Application method of defoaming agent to beneficiation and tailings discarding of stone coal vanadium ore and hydrometallurgy
  • Application method of defoaming agent to beneficiation and tailings discarding of stone coal vanadium ore and hydrometallurgy
  • Application method of defoaming agent to beneficiation and tailings discarding of stone coal vanadium ore and hydrometallurgy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This method is used for stone coal-type vanadium ore in a certain place in Shaanxi. The ore is subjected to grinding, gravity separation, and flotation to obtain enriched vanadium concentrate, the main minerals of which are quartz and clay minerals, and the pulp concentration is 5%.

[0027] Slurry with sulfuric acid until the pH value is 6, tributyl phosphate is used alone or in combination with other defoamers, add different types of defoamers, and use a mechanical mixer to stir at 1400rpm for 5 minutes, the agent will have defoaming effect, and the pulp will settle , after dense dehydration treatment, the supernatant liquid of the pulp is removed, and the liquid-solid ratio reaches 1:1, and the dense pulp is hydrometallurgically leached to extract vanadium. When no antifoaming agent is added to the enriched vanadium concentrate, the foam overflows during the leaching heating process. The following are the results of Experiment 1 after adding different defoamers. Th...

Embodiment 2

[0031] This method is used for stone coal-type vanadium ore in a certain place in Shaanxi. The ore is subjected to grinding and flotation to obtain enriched vanadium concentrate. The main minerals in the enriched vanadium concentrate are quartz, clay minerals and carbon, and the pulp concentration is 15%.

[0032] Slurry with sulfuric acid until the pH value is 6, tributyl phosphate is used alone or in combination with other defoamers, add different types of defoamers, and use a mechanical mixer to stir at 1400rpm for 5 minutes, the agent will have defoaming effect, and the pulp will settle , after dense dehydration treatment, the upper clarified liquid of the pulp is removed, and the liquid-solid ratio reaches 1:1.2, and the dense pulp is hydrometallurgically leached to extract vanadium. When no antifoaming agent is added to the enriched vanadium concentrate, the foam overflows during the leaching heating process. The following are the results of Experiment 2 after adding di...

Embodiment 3

[0036] This method is used for stone coal-type vanadium ore in a certain place in Xinjiang. The ore is subjected to grinding, gravity separation, and flotation to obtain enriched vanadium concentrate. The main minerals in the enriched vanadium concentrate are clay minerals, quartz and a small amount of carbonate, and the pulp concentration is 5%.

[0037] The ore pulp is left to settle and thicken, and the clarified liquid in the upper layer of the ore pulp is removed, and the liquid-solid ratio reaches 1:1.3. The thick ore pulp is hydrometallurgically leached to extract vanadium, and tributyl phosphate is added to add different leaching additives. When no antifoaming agent is added to the enriched vanadium concentrate, the foam overflows during the leaching heating process. The following are the results of Test 3 after treatment with tributyl phosphate and different leaching additives.

[0038] Table 3 Concentrate treatment and treatment results of vanadium extraction by aci...

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Abstract

The invention relates to an application method of defoaming agent to beneficiation and tailings discarding of stone coal vanadium ore and hydrometallurgy. The application method includes the steps of adjusting pH of vanadium concentrate pulp to 3-7; and adding the defoaming agent into the vanadium concentrate pulp, mixing, allowing the concentrate pulp to stand and settle, and performing thickening and dewatering, so that overflow of foam in high-temperature leaching of enriched vanadium concentrate in hydrometallurgy is avoided, and recovery rate of vanadium can be increased greatly. The application method has the advantages that tributyl phosphate is capable of well defoaming vanadium concentrate in floatation; the consumption of the tributyl phosphate is 2% of that of other defoaming agents, consumption of drugs is low, and production cost is reduced; toxicity of the drugs is low, and by the aid of the subsequent vanadium extraction process, environmental pollution is low; and the defoaming agent not only can be independently applied to defoaming the vanadium concentrate in flotation, but also can be used with other leaching additives, and effective leaching is achieved.

Description

Technical field: [0001] The invention belongs to the intersecting field of ore dressing and hydrometallurgy, and specifically relates to an application method of a defoamer in stone coal-type vanadium ore dressing and tailing-hydrometallurgy. Background technique [0002] Vanadium extraction from stone coal is an important aspect of comprehensive utilization of stone coal resources. my country has started the related research and production of vanadium extraction from stone coal since the 1960s. The technical level of vanadium extraction from stone coal has been greatly improved, but there are Problems such as low vanadium recovery rate, high reagent consumption, high cost, and easy pollution are still prominent; and there are few theoretical studies on the extraction of vanadium from stone coal, and the research methods are single, especially the related theoretical research on the roasting process and leaching process is relatively weak , which seriously restricts the develo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03D1/00C22B34/22C22B3/04
CPCY02P10/20
Inventor 赵笑益李洁齐建云马晶王金平
Owner 西安西北有色地质研究院有限公司