阅读说明：本技术 一种煤泥复合浮选药剂 (Coal slime composite flotation reagent ) 是由 刘智 张敏 袁靖 于 2019-10-17 设计创作，主要内容包括：本发明内容属于选矿药剂的制备技术领域,涉及一种以矿物油、醇、酯、乳化剂等作为基础原料的煤泥浮选捕收剂。针对传统煤泥浮选药剂效果差、药剂用量大、气味大、毒性高等不足,提供一种选择性强、用量少、泡沫致密带矿充足、低毒低气味的高效煤泥复合浮选捕收剂。(The invention belongs to the technical field of preparation of beneficiation reagents, and relates to a coal slime flotation collector taking mineral oil, alcohol, ester, an emulsifier and the like as basic raw materials. Aiming at the defects of poor effect, large medicament dosage, large smell, high toxicity and the like of the traditional coal slime flotation medicament, the high-efficiency coal slime composite flotation collector is strong in selectivity, small in dosage, sufficient in foam compact zone ore, low in toxicity and low in smell.)

1. The composite coal slime flotation reagent is characterized in that in the flotation reagent composition, the weight percentage of each composition is 40-60 of mineral oil respectively; 20-30 parts of fatty ester; 10-15 parts of polyoxypropylene alcohol; 2-5 parts of an emulsifier; the preparation process of the flotation reagent composition comprises the steps of firstly putting mineral oil and fatty ester into a reactor according to the proportion, and fully dissolving the mineral oil and the fatty ester at the temperature of 30-40 ℃; secondly, adding polyoxypropylene ether according to the proportion and stirring for 5 minutes for treatment; and thirdly, adding an emulsifier to stir and emulsify the medicament after the reaction is finished.

2. The composition and preparation method of coal slime composite flotation reagent as claimed in claim 1, wherein the mineral oil is a nonpolar mineral oil with basically symmetrical molecular structure and basically covalent bonds between the atoms in the molecule, wherein the carbon chain length is C14-C24 aliphatic hydrocarbon or cyclic hydrocarbon.

3. The composition and preparation method of the coal slime composite flotation reagent according to claim 1, characterized in that the composite reagent mainly comprises fatty ester and polyoxypropylene alcohol ether which play a foaming role and a collecting role simultaneously. The structure of the fatty ester is:

wherein R1 is a fatty chain of C2-C8, and R2 is a fatty chain of C2-C6. The alcohol ether has the structure:

wherein n is 1 to 4.

4. The composition and preparation method of the coal slime composite flotation reagent as claimed in claim 1, wherein the emulsifier is tween, oleic acid, span, alkyl alcohol ether, etc., and the mixture ratio is 2-5 by ultrasonic vibration treatment at 30-40 ℃. The high mixing ratio can cause sufficient emulsification and difficult demulsification. The mixture ratio is low, and the effect of full emulsification cannot be achieved.

Technical Field

The invention belongs to the technical field of preparation of beneficiation reagents, and relates to a coal slime flotation reagent taking mineral oil, alcohol ether, ester, an emulsifier and the like as basic raw materials.

Background

The low-rank coal in China has large reserves, but the coalification degree is low and fragile, and the improvement of the coal mining mechanization level causes a large amount of raw coal with fine granularity to be generated, some coal preparation plants purposefully crush large-block materials to recover more low-ash clean coal and also generate a large amount of secondary coal slime, and the fine-granularity coal slime is mixed with a large amount of impurities with higher ash content, and the energy and economic value of the low-rank coal are far lower than those of high-rank coal, so the low-rank coal is rarely utilized by people all the time. In recent years, as coal with high metamorphic grade in China is exploited and utilized in large quantities, coal energy is increasingly tense, and the large-quantity exploitation and utilization of low-rank coal are gradually promoted. To achieve efficient, non-polluting utilization of this fraction of fine-grained low-rank coal, it is necessary to reduce its ash content by an appropriate method and then process it for utilization.

The traditional coal slime flotation reagent is used by matching kerosene, light diesel oil, coking oil and the like with chemical byproducts (such as fusel and the like). Has the problems of large dosage, low sorting efficiency, large smell, toxicity, easy pollution, low flash point, safety and the like. In the research of coal slime flotation reagents, alcohol ether, ester, emulsifier and mineral oil with low toxicity and low odor are compounded to prepare a high-efficiency environment-friendly coal slime flotation composite reagent, so that the reagent dosage can be effectively reduced, and the coal slime separation efficiency is improved.

Disclosure of Invention

The invention aims to provide a high-efficiency coal slime composite flotation agent with strong selectivity, small dosage, sufficient foam compact zone ore, low toxicity and low odor, aiming at the defects of poor effect, large agent dosage, large odor, high toxicity and the like of the traditional coal slime flotation agent.

The technical solutions adopted to achieve the above objects of the invention are as follows.

A coal slime composite flotation reagent is composed of the following material raw materials in parts by weight:

40-60% of mineral oil,

20-30% of a fatty ester,

10-15% of polyoxypropylene alcohol,

emulsifier (2-5);

the mineral oil used in the medicinal component is C12-C24 aliphatic hydrocarbon or cyclic hydrocarbon, and is nonpolar alkane.

The preparation process of the medicament comprises the steps of heating and stirring mineral oil and fatty ester in a reactor at the temperature of 30-40 ℃ to fully dissolve the mineral oil and the fatty ester, adding polyoxypropylene ether, stirring for 5 minutes, adding an emulsifier, and carrying out ultrasonic oscillation treatment at the temperature of 50 ℃ to emulsify the medicament. And cooling the reagent to normal temperature to obtain the coal slime composite flotation collector.

Compared with the existing reagent, the coal slime flotation reagent prepared by the process uses safe and environment-friendly raw materials, has high flash point and small smell, and is environment-friendly and safe; the collecting property is strong, the selectivity is good, and the collecting and foaming functions are achieved; the additive has good effect on difficult-to-float coal slime such as oxidized coal slime, fine-grain coal slime and the like, and the dosage of the additive is only about 1/3 of that of the traditional additive.

The coal flotation reagent is light yellow to yellow oily liquid, the density of the flotation reagent is 0.88 +/-0.04, the viscosity of the flotation reagent is less than or equal to 8mpa.S, and the water content of the flotation reagent is less than 3 percent; the solubility in water is 0.5-1 per mill, and the organic solvent is dissolved in various organic solvents. Meanwhile, the flotation reagent produced by the scheme is neutral; belongs to nontoxic and non-carcinogenic substances.

In practical use, the above effect can be produced, the main reason is that the mineral oil is a hydrocarbon compound and belongs to a nonpolar medicament, atoms among molecules are combined by covalent bonds, the molecular structure is basically symmetrical, the chemical activity is small, and the mineral oil cannot be dissociated into ions in water, so that the solubility in water is small, the hydrophobicity is high, and the nonpolar medicament has good adsorption performance on natural hydrophobic mineral bituminous coal with a molecular bond broken surface according to the rule that a nonpolar adsorbent easily adsorbs a nonpolar solute and a polar adsorbent easily adsorbs a polar solute; the fatty ester and the polyoxypropylene alcohol ether have good foaming performance in a synergistic mode, formed foams are brittle, the phenomenon of foam accumulation cannot occur, and meanwhile the collecting performance and the chemical property are stable. The proper amount of the emulsifier can effectively emulsify and disperse the mineral oil, so that the collecting capability of the mineral oil can be fully exerted. Meanwhile, after contacting the surface of coal, the coal emulsion can be rapidly broken to release the collecting agent, and the collecting performance of the collecting agent is fully exerted. When the raw materials are mixed according to a certain proportion and stirred at a certain temperature, and the emulsified product is used for flotation of coal, mineral oil with the collecting performance is directionally adsorbed on the surface of coal particles, so that a hydrophobic film is formed on the surface of the coal particles, and the fatty ester and the polyoxypropylene alcohol can not only produce the directional arrangement of molecules on a gas-liquid interface and reduce the surface tension of water, so that a stable hydration film layer is formed, so that the bubbles have certain mechanical strength, and can not be broken out too fast, and hydrophilic groups can also cover a hydrophilic area on the surface of the coal particles, so that the surface of the coal particles is more hydrophobic, and the purpose of flotation of coal is easier to achieve.