Efficient flotation method for oxidized slime

Abstract

The application discloses an efficient flotation method for oxidized coal slime and belongs to the technical field of coal washing and processing. A composite collecting agent is prepared from polyethylene glycol octylphenyl ether and diesel oil, and fatty acid methyl ester is added as a synergistic agent; the mass fraction of the polyethylene glycol octylphenyl ether in the composite collecting agent is 6-10 parts, the mass fraction of the diesel oil is 0-4 parts, the adding amount of the composite collecting agent in the coal sample is 200-1200 g / t, and the adding amount of the fatty acid methyl ester is 20-100 g / t. Through the synergistic effect between the composite collecting agent and the synergistic agent, the hydrophobicity of the surface of the oxidized coal is significantly enhanced, the adsorption amount and the uniformity of the collecting agent on the surface of the coal particles are improved, the problem of low flotation efficiency caused by the high hydrophilicity of the surface due to the high content of oxygen-containing functional groups is effectively overcome, the reagent system constructed by the application has the characteristics of simple formula, wide source, non-irritating odor, environmental friendliness and easy implementation, the clean coal yield can be further improved, the ash content can be effectively controlled, and the application has significant industrial application value.

Images