The choice of crushing equipment type and specifications must adapt to the physical properties of the ore, meet the requirements of processing capacity and product particle size, and consider the factors of equipment configuration. The physical properties related to ore crushing performance are mainly ore hardness, density, viscosity, clay content, moisture, and larger particle size in the ore. The relationship between the larger particle size of the feeder and the width of the feeder port of the crusher is one of the main factors for selecting the size of the crusher. The technicians of Hongke Company believe that for coarse crushers, the larger particle size of the feed should generally not be greater than 0.8-0.85 of the width of the feed port; for medium and fine crushers, it should not be greater than 0.85-0.9.

    Selection of coarse crushing equipment

    The ore processed by the metal mine beneficiation plant is generally hard or medium-hard ore, which is suitable for the choice of jaw crusher or gyratory crusher; in some non-metallic mines or cement industries, when processing medium-hard or softer ore, it is also suitable A counterattack crusher can be used.

    The jaw crusher has a wide range of applications and can be used in large, medium and small concentrators. The main advantages of the jaw crusher are: simple structure, light weight, low price, easy maintenance and transportation, small appearance height, and small plant height; in terms of technology, its work is reliable, the adjustment of the discharge port is convenient, and the crushing is wet. Ores and ores with a lot of clay are not easy to block. The main disadvantages are: the liner is easy to wear, the processing capacity is lower than that of the gyratory crusher, the product size is uneven and there are more large pieces, and the uniform feeding is required, and the feeding equipment is required.

    The gyratory crusher is a kind of equipment with high crushing capacity, which is mainly used in large and medium-sized concentrators. Compared with jaw crusher, the main advantages are: large processing capacity, 2.5-3.0 times of jaw crusher under the same width of ore inlet and discharge opening; less power consumption; crushing cavity lining The board wears evenly, and the product size is uniform; the gyratory crusher with a specification of 900mm or more can be filled with the ore without the need for ore equipment. The main shortcomings are: the equipment structure is more complicated, the equipment weight is large, it requires a solid foundation, the machine body is high, and the higher workshop is required.

    Domestic gyratory crushers are divided into ordinary and light types. The light type is generally only suitable for crushing limestone ore and other ore with low hardness and low density. In addition, there are two types of jaw crushers and gyratory crushers that are suitable for use under special conditions. One is a large-size disintegrable and hoisting crusher, which is suitable for crushing operations in underground mines; the other is a semi-fixed or mobile crusher, which is suitable for crushing operations in underground mines; the other is a semi-fixed or mobile crusher. Type crusher is suitable for rock or ore crushing operations in open-pit mining sites that move regularly or irregularly.

    For large and medium-sized concentrators, before deciding to adopt a jaw crusher or a gyratory crusher, generally, technical and economic comparisons should be made in terms of total equipment weight, installation power, infrastructure investment, operating costs, equipment configuration and process operation advantages and disadvantages, and choose the preferred one. .