A kind of low-rank coal flotation agent and flotation method

Abstract

A low-rank coal flotation agent and flotation method are suitable for the recovery and use of low-rank coal resources. The mass ratio is: waste lubricating oil: 40-60 parts, short-chain ester: 5-25 parts, Span 80: 10 parts, fatty acid polyoxyethylene ether: 10 parts, CuSO 4 : 5 parts, NaCl: 6 parts, flocculant: 4 parts; add the low-rank coal flotation agent and water to the mixing tank Ⅰ for stirring, then add the low-rank coal into the mixing tank Ⅱ for stirring and control the pulp concentration, then Carry out flotation. Its flotation effect is good, and it saves medicine. By adding the flotation agent to the pulp mixing tank in advance, the dispersion performance of the agent in the pulp is promoted, and the full contact and adsorption of the agent and the particles before the election are ensured, so as to play the role of the compound flotation agent. best performance.

Description

technical field [0001] The invention relates to a high-efficiency low-rank coal flotation agent and a flotation method, which are especially suitable for the high-efficiency low-rank coal flotation agent and the flotation method used by coal enterprises for the recovery of low-rank coal resources. Background technique [0002] my country's low-rank coal reserves, including lignite, long-flame coal, non-caking coal, and weakly caking coal, are very rich, accounting for about 40% of the overall coal resources. With the consumption and scarcity of high-quality coke coal and other coal resources, the mining and utilization of low-rank coal is of great significance to ensure my country's coal-based energy supply, realize the efficient use of low-quality coal resources, and reduce environmental pollution from coal measures. With the improvement of mining mechanization and the development of dense medium coal preparation, the coal presents fine particle size characteristics, and fl...

AI Technical Summary

Problems solved by technology

At the same time, the complex mineral embedded structure also greatly reduces the flotation efficiency of low-rank coal

Among them, the main reasons for the high consumption of low-rank coal slime flotation reagents are as follows: (1) Low-rank coal has a low degree of metamorphism, and the particle surface contains a large number of oxygen-containing functional groups. Water molecules form hydrogen bonds, which makes it difficult for hydrocarbon oil collectors to spread effectively on the particle surface; (2) The surface of low-rank coal is usually porous and loose, and the developed pore structure will make the flotation agent directly adsorbed by it, thereby reducing (3) Traditional collectors for low-rank coal flotation are generally hydrocarbon oils such as diesel oil or kerosene. This part of hydrocarbon oil has the characteristics of high viscosity and difficult dispersion in water. In flotation, the addition of excess collector can strengthen the flotation process of low-rank coal to a certain extent, but the high dosage is not conducive to the dispersion of collector

Problems such as poor flotation effect of low-rank coal and high reagent consumption have always been one of the problems that plague the production of coal preparation plants

Although these methods have achieved certain experimental results, they have not fundamentally solved the problems of low-rank coal difficult to float and high chemical consumption, and it is difficult to meet the required experimental requirements in actual production.

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