The review of ore crushing and grinding processes at the mining-and-processing enterprise is presented. An alternative to the standard technology of crushing ore in cone crushers is proposed after a comparative analysis of ore grinding processes.The modern branch of industry is characterized by high costs for the implementation of technological processes based on the disintegration of materials. Mining companies have a complex technological process, one of the stages of which is the process of reducing ore pieces. The extracted mineral in most cases is a mixture of closely intergrown mineral pieces of various sizes. The size of the ore depends on the type of mining and, in particular, on the method of blasting. With open mining, the largest pieces are 1 -1.5 m in diameter, while with underground work they are slightly smaller [1].To assess the efficiency for the use of technological processes and ore crushing and grinding equipment, when obtaining the final product at JSC "Almalyk MMC", we will perform a comparative analysis of ore preparation.The process of material pieces or grains reduction by destruction under the influence of external mechanical forces, depending on the size of the final product, is called crushing or grinding (crushing is effected by crushing, splitting, impact forces or a combination thereof, and grinding as a result of impact and abrasive forces). Previously believed that the material destruction during crushing is due to compressive forces, and when grinding from shear. At present, there are no fundamental differences between crushing and grinding, and the difference is only in the size of the starting material and the final product. The types of crushing are distinguished by the size of the obtained product pieces, and the types of crushing are determined by the content of coarse or fine grain classes in the product. It is conditionally considered that during crushing, a product with a maximum grain size of more than 5 mm is obtained, and when grinding it is less than 5 mm.Crushing and grinding are preparatory operations of enrichment and are intended for ore grains separation (opening) of various minerals, contained in the mineral in the form of closely intertwined intergrowths. The more fully the minerals are revealed during crushing and grinding, the more successful the subsequent mineral enrichment is.Evaluation of the crushing and grinding results is performed according to the degree of crushing, grinding and efficiency of crushers and mills.The degree of crushing or grinding is determined by the formula:

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Bridged compounds Q 0060 Synthesis of para-Substituted Bicyclo[2.2.1]hept-5-en-2-ylmethyl Benzoates-[by Diels-Alder reaction of cyclopentadiene with p-substituted allyl benzoates]. -(MAMEDBEILI*, E. G.; KYAZIMOVA, T. G.; NAGIEV, Z. M.; ABDIEV, O. B.; ALIEV, K. A.; Russ.

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