A low-rank coal flotation using polar mixed reagents and flotation process

Abstract

A low-rank coal flotation uses a polar mixed agent and a flotation process, which is applicable to the technical field of low-rank coal mining. The composition of raw materials is calculated in parts by mass: short-chain ester: 30-44 parts, n-octanoic acid: 30-44 parts, secondary octanol: 3 parts, fatty acid polyoxyethylene ether: 7 parts, Tween 40: 5 parts, Span 80:4 parts, CuSO 4 : 7 servings. When in use, use the ultrasonic waves emitted by the mixing bucket and the ultrasonic board to fully mix in the aqueous solution in advance. Its chemical consumption is small, which improves the recovery rate of flotation, fully disperses different types of chemical molecules into the pulp solution, reduces the size of collector oil droplets, and makes it more efficient to effectively spread on the surface of coal particles, which greatly improves the chemical efficiency. The efficiency of the action increases the recovery rate of clean coal and reduces the pollution of the coal-based environment.

Description

technical field [0001] The invention relates to a polar mixed agent for flotation of low-rank coal and a flotation process, and is especially suitable for a polar mixed agent for flotation of low-rank coal and a flotation process used in coal enterprises. Background technique [0002] The reserves of low-rank coal, including lignite and long-flame coal, account for more than 50% of the total coal reserves; low-rank coal has low mining cost and easy access, and has become an important energy supply and chemical production raw material. However, low-rank coal itself has the characteristics of low calorific value and high ash content, which restrict the large-scale industrial application of low-rank coal and cause serious waste of resources. Therefore, in order to improve the utilization efficiency of low-rank coal resources and the technical concept of green production, it is necessary to classify and sort low-rank coal before industrial use, so as to achieve the purpose of re...

AI Technical Summary

Problems solved by technology

However, due to the low degree of metamorphism of low-rank coal, the surface contains a large number of oxygen-containing functional groups, such as carboxyl, hydroxyl and methoxyl groups, etc., resulting in a large amount of water molecules adsorbed on the coal surface to contain oxygen during the flotation and pulping process of low-rank coal. A hydration film is formed on the group, which seriously hinders the adsorption and spreading of oil collector molecules on the surface of low-rank coal

At the same time, due to the high viscosity of the oil collector molecules, they are easy to self-polymerize in the water environment, which also limits their adsorption on the coal surface.

The poor adsorption effect of oil collector molecules on the surface of low-rank coal has become the main factor affecting the flotation improvement of low-rank coal

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