Low-rank coal flotation reagent and flotation method thereof

Abstract

A low-rank coal flotation reagent and a flotation method thereof are suitable for recycling low-rank coal resources. The flotation reagent is prepared from, by mass, 40 to 60 parts of waste lubricating oil, 5 to 25 parts of short-chain ester, 10 parts of span 80, 10 parts of fatty acid polyoxyethylene ether, 5 parts of CuSO4, 6 parts of NaCl and 4 parts of a flocculating agent. The low-rank coal flotation reagent and water are added into a stirring barrel I and are stirred, then low-rank coal is added into a stirring barrel II and is stirred, the concentration of ore pulp is controlled, and then flotation is conducted. The flotation effect is good, the flotation agent is saved, and the flotation agent is added into the ore pulp stirring barrel in advance to promote the dispersing performance of the flotation agent in the ore pulp and ensure sufficient contact and adsorption of the flotation agent and particles before flotation, so the optimal performance of the composite flotation agent is achieved.

Description

technical field [0001] The invention relates to a low-rank coal flotation agent and a flotation method, and is 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 flotation is one of t...

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.

Images