CN-117085853-B - Reverse flotation collector and preparation method and application thereof

CN117085853BCN 117085853 BCN117085853 BCN 117085853BCN-117085853-B

Abstract

The invention provides an anti-floatation collector, a preparation method and application thereof. The reverse flotation collector is compounded with the nonpolar oil-fatty primary amine combined collector, and the nonpolar oil is used as an auxiliary collector to mix and dissolve the fatty primary amine, so that the interfacial tension is reduced by adsorption on the oil-water interface of the nonpolar oil through the emulsification of the fatty primary amine, the selectivity of organic carbon is enhanced, and the content of black organic carbon is reduced. The invention enhances the solubility of a single collector in a water body by utilizing the emulsification characteristic of the primary fatty amine, thereby reducing the drug cost of the collector, and removes SiO 2 impurities by reverse flotation through the electrostatic adsorption characteristic of the primary fatty amine and silicate.

Inventors

ZHANG HUALI
JIA ZHENLIN
LIANG HUAN

Assignees

武汉工程大学

Dates

Publication Date: 20260508
Application Date: 20230706

Claims (3)

1. An application of a reverse flotation collector in phosphogypsum flotation; the application comprises the following steps: adding water into phosphogypsum to prepare slurry; adding a reverse flotation collector into the slurry for reverse flotation; The reverse flotation collector comprises the following components by mass percent, 10% of pine alcohol oil, 20% of nonpolar oil, 50% of aqueous solution of fatty primary amine and 20% of aqueous solution of alcohol; The nonpolar oil is aviation kerosene; the primary fatty amine in the aqueous solution of the primary fatty amine is dodecylamine; the mass fraction of the primary fatty amine in the primary fatty amine aqueous solution is 5%; The alcohol in the aqueous solution of the alcohol is n-butanol; the mass fraction of alcohol in the aqueous solution of alcohol is 8%.
2. The use according to claim 1, characterized in that the method for preparing the reverse flotation collector comprises the steps of: mixing the aqueous solution of the primary aliphatic amine, terpineol and nonpolar oil, adding the mixture into the aqueous solution of the alcohol, stirring, and performing ultrasonic treatment to obtain the reverse flotation collector.
3. The use according to claim 2, wherein the reverse flotation collector is obtained by mixing an aqueous solution of a primary aliphatic amine, terpineol and nonpolar oil, adding the mixture into the aqueous solution of alcohol, stirring the mixture, and then performing ultrasonic treatment at a temperature of 40-50 ℃ for 30-60 min.

Description

Reverse flotation collector and preparation method and application thereof Technical Field The invention belongs to the technical field of solid waste treatment, and particularly relates to a reverse flotation collector, a preparation method and application thereof. Background Phosphogypsum is an industrial byproduct of wet-process phosphoric acid, has an off-white or off-black powdery solid appearance, and mainly comprises CaSO 4·nH2 O with the proportion of more than 85%, and further contains undissolved phosphate rock powder, unwashed phosphoric acid, iron-aluminum compounds, acid insoluble substances, organic matters, P, F, heavy metals and other impurities. According to the current investigation, the phosphogypsum stock of China exceeds 6 hundred million tons, about 8000 ten thousand tons are newly increased each year, increment is continuously generated, and the stock utilization rate is low. Because of the presence of phosphogypsum impurities, the resource utilization of phosphogypsum is greatly hindered. The method for desilication, purification and whitening of phosphogypsum by flotation is an excellent method for treating phosphogypsum, however, at present, the method for treating phosphogypsum by flotation at home and abroad is still in a starting stage. Less research on flotation agents, and the flotation agents are mostly used for referencing the fields of coal slime separation, phosphorite flotation and the like. Therefore, the method has the characteristics of weaker mineral pertinence in the phosphogypsum flotation process and the like. The prior art discloses a phosphogypsum reverse flotation whitening impurity-removing agent and a preparation method thereof, wherein the reverse flotation collecting agent is compounded by tributyl phosphate, terpineol, primary fatty amine and dimethyl tertiary amine, the collecting agent has good adaptability to strong acid environment, but the flotation process is complicated, the better effect can be achieved only by pairwise reverse and positive directions, and the collecting agent for collecting siliceous minerals and the preparation method thereof are also disclosed. The method is used in phosphogypsum flotation process, and has low efficiency of removing organic carbon and lower whiteness. In view of the problems with existing collectors, improvements are needed. Disclosure of Invention In view of the above, the invention provides an anti-flotation collector, a preparation method and application thereof, so as to solve the defects in the prior art. In a first aspect, the invention provides an reverse flotation collector comprising terpineol, nonpolar oil, aqueous solution of primary aliphatic amine and aqueous solution of alcohol; wherein the primary fatty amine in the aqueous solution of the primary fatty amine is primary fatty amine with a fatty alkyl carbon chain length of C12-C18. Preferably, the reverse flotation collector comprises at least one of aviation kerosene, light diesel oil and shale light diesel oil. Preferably, the reverse flotation collector comprises at least one of dodecyl amine, hexadecyl amine and octadecyl amine in the aqueous solution of the primary fatty amine. Preferably, in the reverse flotation collector, the mass fraction of the primary fatty amine in the primary fatty amine aqueous solution is 4-6%. Preferably, the reverse flotation collector comprises an alcohol in an aqueous solution of the alcohol, wherein the alcohol comprises at least one of methanol, ethanol and n-butanol; the mass fraction of the alcohol in the aqueous solution of the alcohol is 5-10%. Preferably, the reverse flotation collector comprises, by mass, 5% -10% of pine-alcohol oil, 10% -20% of nonpolar oil, 30% -60% of aqueous solution of primary aliphatic amine and 20% -40% of aqueous solution of alcohol. In a second aspect, the invention also provides a preparation method of the reverse flotation collector, which comprises the following steps: mixing the aqueous solution of the primary aliphatic amine, terpineol and nonpolar oil, adding the mixture into the aqueous solution of the alcohol, stirring, and performing ultrasonic treatment to obtain the reverse flotation collector. Preferably, in the preparation method of the reverse flotation collector, the aqueous solution of the primary aliphatic amine, terpineol and nonpolar oil are mixed and then added into the aqueous solution of the alcohol, and after stirring, the reverse flotation collector is obtained by ultrasonic treatment at the temperature of 40-50 ℃ for 30-60 min. In a third aspect, the invention also provides an application of the reverse flotation collector or the reverse flotation collector prepared by the preparation method in phosphogypsum flotation. Preferably, the application comprises the following steps: adding water into phosphogypsum to prepare slurry; And adding a reverse flotation collector into the slurry for reverse flotation. The reverse flotation collector is compounded with