In beneficiation plant in order to make useful minerals monomer solution to be reached from the cost of pay it is very striking. In the concentrator, the electricity consumption of the grinding process generally accounts for more than 50% of the electricity consumption of the whole plant, accounting for 10-20% of the production cost. Therefore, improving grinding efficiency is of great significance for reducing energy consumption and reducing the cost of mineral processing.
In recent years, in order to improve the grinding efficiency, a new grinding process, namely the grinding aid process, has been developed. It is a chemical agent added to the grinding, which changes the grinding environment to the physical and chemical properties of the surface of the material to improve the grinding efficiency. To achieve this purpose, the chemical added in the mill is called For grinding aids.
The research on grinding aids was originally initiated in the 1930s. In 1931, when the hardness of the side material was found, Melon A. Rebinger found that the solid surface was covered with a film, and its R degree was smaller than that of a smooth surface. So he systematically examined the influence of the surrounding medium on the mechanical properties of the material during the destruction process. The experimental results on water, inorganic salts and surfactants show that the relationship between the hardness reduction of calcite and the concentration of the additive has the characteristics of adsorption isotherm. He also focused on the effect of surfactant adsorption on reducing solid curvature.
The results of this research by Rebinger laid a new edge discipline - the basis of physical and chemical mechanics. After that, many researchers have carried out a discussion on the effects of various chemical agents on the mechanical properties of solids. And its mechanism of action and application conditions were studied. The most prominent human AR 1965 Westwood (Westwood) and colleagues studied water, toluene, heptane and homologues until the atmosphere of the aqueous solution of aluminum alloy hexadecane flat drill bit penetrates new cleaved The effect of the rate of the MgO and CaF single crystals is believed to be due to the change in the near-surface electronic state caused by the adsorption. This change leads to a special interaction between the dislocations and the defect points in the crystal lattice.
It was reported in 1972 that West Germany and Yugoslavia succeeded in using grinding aids in production, resulting in a significant increase in the production capacity of the mill.
Published in 1975 Eleventh International Conference on beneficiation studies the former Soviet Union together with Bulgaria, Bulgaria ur iron ore deposits ladder Ivanov, the low molecular weight fatty acids as grinding aids, promote understanding of the ore particles 9 from there Conducive to selective grinding, the concentrate iron content increased by 1-1.5%, the recovery rate increased by 2-8%, while also improving the processing capacity of the grinding machine.
In 1977, at the 12th International Mineral Processing Conference, the results of R. Klim-pel's use of grinding aid CF-4272 were published. He comprehensively examined the relationship between grinding aid and slurry concentration, slurry viscosity and grinding rate.
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