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Coal slime flotation collector and preparation method thereof

A coal slime flotation and collector technology, which is applied in flotation, solid separation, etc., can solve the problems of many floating objects, poor dispersion, and low ash content in tailing coal, and achieve economic benefits, simple preparation process, good stability effect

Inactive Publication Date: 2010-06-09
SHANXI MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Hydrocarbon oil is a kind of hydrophobic substance with poor dispersion in water and can only exist in the form of droplets (>1mm), while the particle size of flotation coal particles is below 0.5mm. On the one hand, larger oil droplets It will be excessively adsorbed by fine coal particles, and float out in advance to cause waste, while the coarse coal particles are lost in the tailing coal due to insufficient reagents in the flotation process, and the flotation selectivity is poor, and the ash content of the tailing coal is low; on the other hand , the oil droplets will cover the fine mud on the surface of the coal slime while being adsorbed by the coal particles, resulting in more floating objects and an increase in the ash content of the clean coal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1, prepare coal slime flotation collector

[0019] Mix Tween 80 and Span 80 at a ratio of 4:1 (m / m, mass ratio) to obtain a mixed emulsifier (HLB value 12.9), add 50kg of the above mixed emulsifier to 1000kg kerosene, and stir until uniformly mixed. With a stirring rate of 100rmp, add 30kg of an aqueous solution of sodium dodecylbenzenesulfonate with a mass content of 5% while stirring until it becomes thick. When stirring is not splashing and there is no sound, add a small amount of water (about 100kg) and stir rapidly (stirring speed 300rpm) promptly forms thick colostrum. Stir and add water to the desired concentration to obtain milky white emulsified kerosene. The emulsified oil is stable, repeated exposure to the sun, freezing, no delamination, demulsification, etc., and no delamination after being placed at room temperature for 3 months.

Embodiment 2

[0020] Embodiment 2, prepare coal slime flotation collector

[0021] Mix Tween 20 and Span 80 at a ratio of 4:1 (m:m, mass ratio) to obtain a mixed emulsifier (HLB value 14.2), add 100kg of the above mixed emulsifier to 1000kg kerosene, and stir until uniformly mixed. With a stirring rate of 100rmp, add about 30kg of sodium dodecylbenzenesulfonate aqueous solution with a mass content of 1% while stirring until it becomes thick. When the stirring is not splashing and there is no sound, add a small amount of water (about 100kg) and stir rapidly (stirring speed 300rpm) promptly forms thick colostrum. Stir and add water to the desired concentration to obtain milky white emulsified kerosene. The emulsified oil is stable, repeated exposure to the sun, freezing, no delamination, demulsification, etc., and no delamination after being placed at room temperature for 3 months.

Embodiment 3

[0022] Embodiment 3, prepare coal slime flotation collector

[0023] Mix Tween 40 and Span 80 at a ratio of 4:1 (m:m, mass ratio) to obtain a mixed emulsifier (HLB value 13.3), add 80kg of mixed emulsifier to 1000kg kerosene, and stir until uniformly mixed. With a stirring speed of 100rmp, add mass content while stirring while stirring and be about 20kg of the aqueous solution of the mixture of fatty alcohol polyoxyethylene ether sodium sulfate and sodium dodecylbenzenesulfonate mass ratio of 1: 1 to thicken, when When the stirring is not splashing and there is no sound, add a small amount of water (about 100kg) and stir rapidly (stirring speed 300rpm) to form thick colostrum. Stir and add water to the desired concentration to obtain milky white emulsified kerosene. The emulsified oil is stable, repeated exposure to the sun, freezing, no delamination, demulsification, etc., and no delamination after being placed at room temperature for 3 months.

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Abstract

The invention discloses a coal slime flotation collector and a preparation method thereof. The coal slime flotation collector comprises the following matters in percentage by weight: 20-50 percent of kerosene and / or light diesel oil, 1-5 percent of primary emulsion, 0.006-0.015 percent of auxiliary emulsion and the balance of water; wherein the primary emulsion is a mixture of polyoxyethylene sorbitan fatty acid ester and dehydrated sorbitol fatty acid ester, and the hydrophile-lipophile balance (HLB) value of the primary emulsion is within 12.8-14.3; the auxiliary emulsion is selected from the following (1) or (2), wherein the (1) is sodium dodecyl benzene sulfonate, and the (2) is a mixture obtained by mixing fatty alcohol polyoxyethylene ether sulfate and the sodium dodecyl benzene sulfonate according to the mass ratio of 1: 0.5-2. The coal slime flotation collector has good stability, simple preparation process and 40-60 percent of the oil-saving ratio on the premise of improving the float yield and the tail coal ash proportion. The collector is beneficial to saving the energy, reducing the emission and improving the economical benefit when being used for floating the coal slime.

Description

technical field [0001] The invention relates to a coal slime flotation collector and a preparation method thereof. Background technique [0002] With the development of coal mining mechanization, the content of coal slime in raw coal is increasing day by day. At the same time, users and all aspects of the society require further improvement of clean coal quality, improvement of coal slime water treatment methods, reduction of environmental pollution, and the role of flotation in coal preparation. important. Flotation is based on the differences in the physical and chemical properties of the mineral surface to achieve separation. The structure of coal is complex, the microscopic components of each part are different, and the properties of the surface of coal particles are not uniform. Most of them are non-polar areas, and some are polar areas. In the coal slime flotation process, non-polar neutral hydrocarbon oils, such as kerosene and light diesel oil, are usually added as...

Claims

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Application Information

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IPC IPC(8): B03D1/016B03D101/02
Inventor 田青平段海龙吕靖刘继斌
Owner SHANXI MEDICAL UNIV
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