Coal dressing composite reagent and preparing method thereof

Abstract

The invention discloses a coal dressing composite reagent and a preparing method thereof. Raw materials used in the preparing method of the coal dressing composite reagent include, by mass percent, 65% of arene residual liquid, 15% of butanol and octanol residual liquid, 5% of light diesel oil, 1%-5% of an emulsifying agent and 10%-14% of water. The manufacturing method of the coal dressing composite reagent comprises the following steps that the arene residual liquid, the butanol and octanol residual liquid and the light diesel oil are mixed according to a required proportion and put into a reaction kettle with a stirring function, stirring is conducted for 30 min, and mixed oil liquid is formed; and the emulsifying agent and the water are mixed according to a required proportion, a mixed solution of the emulsifying agent and the water is obtained, the mixed solution of the emulsifying agent and the water is added to the obtained mixed oil liquid under the stirring condition at the stirring rate of 100 rmp, and stirring is conducted continuously till the solution is brown. Selectivity of hydrocarbon oil on cleaned coal can be improved through the coal dressing composite reagent, a floatation effect is improved, the floatation cost is saved, in addition, products high in additional value are produced by reasonably utilizing the arene residual liquid, and very good economic benefits and social benefits are achieved; and meanwhile the beneficial effects of facilitating energy saving and emission reducing, improving the economic benefits and the like are achieved.

Description

technical field [0001] The invention relates to a coal preparation composite agent and a preparation method thereof, and belongs to the technical field of coal slime flotation agent preparation. Background technique [0002] scene technology [0003] With the continuous deterioration of coalfield geological conditions, the increase of the proportion of mechanized coal mining, and the use of dense medium cyclones in coal preparation operations, the content of coal slime in washed raw coal is getting higher and higher. Coal slime flotation is the most commonly used method for fine particle coal treatment. Coal slime flotation is a process of separating at the phase interface by relying on the difference in wettability of coal and gangue surfaces. Due to the difference in the natural surface properties of coal and gangue, it is often necessary to add flotation agents to change the hydrophobicity of the coal surface during the flotation process, improve the buoyancy of coal, a...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems that the traditional diesel oil + 2-octanol agent has poor dispersibility, large amount of agent consumption, and general flotation effect in the coal slime flotation process, the present invention provides a coal preparation compound agent and its preparation method. The compound agent can not only improve the selectivity of hydrocarbon oil to clean coal, improve the flotation effect, save the cost of flotation, but also rationally utilize the aromatic hydrocarbon raffinate to produce high value-added products, which has good economic and social benefits; In addition, using the aromatic hydrocarbon raffinate as the raw material of the coal preparation compound agent has no irritating odor, good stability, and simple preparation process. On the premise of improving the floating fine yield and tailing coal ash content, the fuel saving rate can reach 25% %; at the same time, it is beneficial to energy saving and emission reduction, and to improve economic benefits, etc.

Images