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Application of amine collecting agent

A technology of collectors and amines, applied in the application field of amine collectors, can solve the problems that scheelite and calcite cannot be separated by flotation, collectors are not easy, collectors are not easy, etc., and achieve good results. Flotation effect, simple chemical system, high selectivity effect

Inactive Publication Date: 2020-02-11
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • 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); Separating scheelite and gangue mineral calcite, it is not easy to provide a collector with simple use process and simple chemical system

Method used

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  • Application of amine collecting agent

Examples

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Effect test

preparation example Construction

[0022] In the present invention, the preparation method of described N-dodecylpropanolamine preferably comprises the following steps:

[0023] Add the mixed liquid of propylene oxide and absolute ethanol into the liquid dodecylamine to carry out addition reaction, then carry out vacuum distillation, recrystallization, filtration, freezing and drying in sequence to obtain the N-dodecylpropanol amine.

[0024] In the present invention, unless otherwise specified, the medicaments are commercially available products well known to those skilled in the art.

[0025] In the present invention, the mixed liquid of propylene oxide and absolute ethanol is preferably added dropwise into liquid dodecylamine for addition reaction to obtain crude N-dodecylpropanolamine. In the present invention, when dodecylamine is solid, the method for obtaining the liquid dodecylamine is preferably a constant temperature water bath method; the water bath temperature of the constant temperature water bath...

Embodiment 1

[0039]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 the pH regulator to adjust the pH value of the primary pulp to 6.5, stir at 1704rpm for 2min, keep the pH value at 6.5, and obtain the pulp;

[0040] Add the collector N-dodecylpropanol of 50mg / L in gained ore slurry, carry out mineral flotation scraping bubble after the same stirring 2min, the time is 2min, obtain concentrate (foam product) and tailings (product in tank ); process flow chart see figure 1 .

[0041] The concentrate and tailings were put into a vacuum oven for drying and weighed, and the recovery rate was calculated according to Formula I.

[0042] R=M 1 / (M 1 +M 2 )×100% Formula I;

[0043] In formula I, R is the recovery r...

Embodiment 2

[0048] Put 2g of calcite 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 tank flotation machine, stir for 2min under the condition of 1704rpm, and obtain the primary slurry Material; at room temperature, the pH value of the primary pulp was adjusted to 6.5 with the HCl / NaOH solution of 1mol / L as a pH regulator, and stirred for 2min at 1704rpm to keep the pH value at 6.5 to obtain the pulp;

[0049] Add the collector N-dodecylpropanol of 50mg / L in gained ore slurry, carry out mineral flotation scraping bubble after the same stirring 2min, the time is 2min, obtain concentrate (foam product) and tailings (product in tank ).

[0050] Calculate the calcite recovery rate according to formula I, and calculate the calcite recovery rate to be 1.5%.

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Abstract

The invention belongs to the technical field of ore dressing, and particularly relates to application of an amine collecting agent. The invention provides the application of the amine collecting agentto flotation of scheelite or gangue mineral calcite. The amine collecting agent is N-dodecyl propanolamine. The amine collecting agent, i.e., N-dodecyl propanolamine, provided by the invention is lowin toxicity and free of pollution, has strong electrostatic adsorption, hydrogen bond adsorption and physical adsorption effect on scheelite or gangue mineral calcite, shows high selectivity for scheelite and gangue mineral calcite, does not needed to be compounded with other collecting agents, and is simple and convenient in application process and simple in agent system. Test results show thatthe amine collecting agent N-dodecyl propanolamine provided by the invention is used for mineral flotation collection, has a scheelite recovery rate of 93.89% and a calcite recovery rate of 5.27%, andhas the advantages of high efficiency, high selectivity, simple use process, simple reagent system and good flotation effect.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to the application of an amine 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 WO 3 76.56%) has the eco...

Claims

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Application Information

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IPC IPC(8): B03D1/01B03D1/02B03D103/02B03D101/02
CPCB03D1/01B03D1/028B03D2201/02B03D2203/02
Inventor 刘畅曾桂生王忠兵倪晨权罗旭彪任重杨利明邵鹏辉熊贞盛刘廷玺
Owner NANCHANG HANGKONG UNIVERSITY
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