Flotation promoter of coal slime and method for preparing flotation reagent

Abstract

The invention discloses a flotation promoter of coal slime. The flotation promoter comprises the following materials in percent by weight: 40%-70% of a gemini surfactant, 20%-40% of a polyoxyethylene ether surfactant and 0%-20% of an aliphatic ester surfactant. The invention also discloses a method for preparing a flotation reagent from the flotation promoter of the coal slime. The flotation promoter disclosed by the invention has the advantages that since a novel surfactant-bisamide diester group non-ionic gemini surfactant is mainly adopted as a main component, not only can the flotation effect be obviously improved, but also the used quantity of the flotation reagent can be reduced, the adaptability to different coal types and different flotation reagents is strong, the problem of poor cooperativity of the promoter to different flotation reagents in the prior art is solved, the emulsification is not needed, the defects in the prior art that the emulsification is required to be carried out in advance, even the original flotation process is changed and the operation is fussy are overcome, so that the purposes of reducing the reagent consumption and improving the flotation efficiency are achieved.

Description

technical field [0001] The invention relates to a coal slime flotation accelerator and a method for preparing a flotation agent, which are mainly used for coal slime flotation. Background technique [0002] my country is one of the countries where coal is the main energy source. 70% of energy and 60% of chemical raw materials come from coal. With the improvement of coal mining mechanization and the aggravation of poor, fine and miscellaneous conditions of industrial deposits, the proportion of fine-grained coal slime in the selected raw coal continues to increase, accounting for 20% to 30% of the raw coal. There are many fine-grained coal slime separation technologies, but in terms of the current development level of coal preparation technology at home and abroad, flotation is still the most effective method for fine-grained coal slime separation. [0003] The coal slime flotation process in my country's coal preparation plants generally has the problems of large flow, low ...

AI Technical Summary

Problems solved by technology

In 2012, the amount of floating dry coal slime in my country was about 450 million to 500 million tons. Based on the calculation of 1.3 kg of collector required for each ton of dry coal slime in flotation, the national consumption of coal collectors was about 600,000 tons. Increased production costs and impact on the process operation of the flotation system

[0005] As can be seen from the prior art, the problems in these technologies include: the flotation accelerators used are all higher fatty acid alcohol ester surfactants, and this type of accelerator is only for traditional non-composite reagents, and there is a problem with different flotation The problem of poor chemical synergy, and the accelerator in the disclosed technology needs to emulsify diesel oil first, and then carry out flotation, which is cumbersome to operate and high in production cost

[0007] However, Gemini surfactants are applied to the coal slime flotation accelerator to increase the yield of clean coal, adapt to different coal types, and have strong synergy with different flotation agents, without changing the original flotation process, and the operation is simple The process or technology has not been reported

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