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Application for gemini quaternary ammonium salt collecting agent

A Gemini quaternary ammonium salt and collector technology, which is applied in the direction of solid separation and flotation, can solve the problems of poor selectivity, difficult collectors, and inability to realize flotation separation of scheelite and calcite, and achieve The effect of high selectivity, high selectivity and good flotation effect

Inactive Publication Date: 2020-05-22
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with the traditional anionic collector sodium oleate, the cationic quaternary ammonium collector has a stronger flotation capacity for scheelite, but select the collector that can simultaneously realize the flotation of scheelite and gangue mineral calcite It is not easy. For example, dodecyl dimethyl ammonium chloride has a certain ability to collect scheelite and gangue mineral calcite, but it is also a cationic quaternary ammonium substance dodecyl trimethyl ammonium chloride. Then the flotation separation of scheelite and calcite cannot be realized (Yang Fan. Application of quaternary ammonium collector in scheelite flotation and research on its mechanism of action [D]. Central South University, 2013); at the same time, the existing cationic The collector has the problem of poor selectivity after the pH value of the flotation system increases

Method used

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  • Application for gemini quaternary ammonium salt collecting agent

Examples

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preparation example Construction

[0021] In the present invention, the preparation method of said hexane-1,6-didodecyldimethylammonium bromide preferably comprises the following steps:

[0022] Mix 1,6-dibromohexane, dodecyl tertiary amine and ethanol for quaternization reaction to obtain the hexane-1,6-didodecanyldimethylammonium bromide.

[0023] In the present invention, unless otherwise specified, the medicaments are commercially available products well known to those skilled in the art.

[0024] In the present invention, the molar ratio of 1,6-dibromohexane to dodecyl tertiary amine is preferably 1:2.2. The present invention does not limit the amount of ethanol used, subject to the ability to fully dissolve 1,6-dibromohexane and dodecyl tertiary amine; the ethanol used in the present invention is a solvent. In the present invention, the quaternization reaction is preferably carried out under a protective atmosphere; the protective atmosphere is preferably nitrogen. In the present invention, the quaterni...

Embodiment 1

[0035] Put 2g of scheelite ore sample into the flotation cell, add deionized water according to the mass ratio of the ore sample to deionized water is 1:17, use a hanging cell flotation machine, stir for 2min under the condition of 1704rpm, and obtain the primary Slurry: at room temperature, use 1mol / L HCl solution and NaOH solution as pH regulators to adjust the pH value of the primary pulp to 7, stir at 1704rpm for 1min, keep the pH value at 7, and obtain pulp;

[0036] Add 0.5×10 to the resulting slurry -4 Gemini quaternary ammonium salt collector hexane-1,6-didodecyl dimethyl ammonium bromide of mol / L, after stirring 3min, carry out mineral flotation scraping foam, flotation time is 3min, obtains concentrate ( foam product) and tailings (tank product); process flow chart see figure 1 .

[0037] The concentrate and tailings were put into a vacuum oven for drying and weighed, and the recovery rate was calculated according to Formula I.

[0038] R=M 1 / (M 1 +M 2 )×100% ...

Embodiment 2

[0048] Put 2g of scheelite ore sample into the flotation cell, add deionized water according to the mass ratio of the ore sample to deionized water is 1:17, use a hanging cell flotation machine, stir for 2min under the condition of 1704rpm, and obtain the primary Slurry: at room temperature, use 1mol / L HCl solution and NaOH solution as pH regulators to adjust the pH value of the primary pulp to 11, and stir for 1 min at 1704rpm to keep the pH value at 11 to obtain pulp;

[0049] Add 0.5×10 to the resulting slurry -4 Gemini quaternary ammonium salt collector hexane-1,6-didodecyl dimethyl ammonium bromide of mol / L, after stirring 3min, carry out mineral flotation scraping foam, flotation time is 3min, obtains concentrate ( foam product) and tailings (tank product).

[0050] Calculate the recovery rate of scheelite according to the formula I, and the calculated recovery rate of scheelite is 95.05%.

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Abstract

The invention belongs to the technical field of ore dressing, and specifically relates to an application for a gemini quaternary ammonium salt collecting agent. The gemini quaternary ammonium salt collecting agent provided by the invention is applied to scheelite or gangue mineral calcite flotation. The gemini quaternary ammonium salt collecting agent is hexane-1,6-didodecyl dimethyl ammonium bromide. The gemini quaternary ammonium salt collecting agent, namely the hexane-1,6-didodecyl dimethyl ammonium bromide provided by the invention is low in toxicity and free of pollution, has strong electrostatic adsorption, hydrogen bond adsorption and physical adsorption with scheelite or gangue mineral calcite, has high selectivity for scheelite and gangue mineral calcite, has wide flotation applicable pH range and does not need to be compounded with a collecting agent. Test results show that the gemini quaternary ammonium salt collecting agent provided by the invention is used for mineral flotation collection, can reach a scheelite recovery rate of 97.51% and a calcite recovery rate of only 8.24%, and has stable and highly-efficient selectivity and good flotation separation effect.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to the application of a gemini quaternary ammonium salt collector. Background technique [0002] Collectors are the most important type of flotation agents that change the hydrophobicity of the mineral surface and make the floating ore particles adhere to the air bubbles. It has two basic properties: (1) It can be selectively adsorbed on the mineral surface; (2) It can improve the hydrophobicity of the mineral surface, making it easy to adhere to the air bubbles, thereby improving the buoyancy of the mineral. Separation of scheelite from calcium-bearing gangue minerals has always been a recognized problem in the field of mineral processing. Tungsten is found in more than 20 kinds of tungsten-containing minerals in the earth's crust, most of which are tungstates, of which only scheelite CaWO 4 (including WO 3 80.60%) and wolframite (Fe, Mn) WO 4 (including ...

Claims

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Application Information

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IPC IPC(8): B03D1/01B03D1/02B03D101/02B03D103/04
CPCB03D1/011B03D1/02B03D2201/02B03D2203/04
Inventor 罗旭彪倪晨权任重刘畅曾桂生杨利明邵鹏辉熊贞晟刘廷玺
Owner NANCHANG HANGKONG UNIVERSITY
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