Metal ore mining mineral processing plant is generally treated hard or hard minerals, the choice of suitable jaw crusher or gyratory crusher.
Jaw crusher has a wide range of applications, and large, medium and small concentrators can be used. The main advantages of the jaw crusher are: simple structure, light weight, low price, easy maintenance and transportation, small height and low plant height; in terms of process, it is reliable, adjusts the discharge port, and is broken and wet. Ore and ore containing more clay are less likely to clog. The main disadvantages are: the lining is easy to wear, the processing volume is lower than that of the gyratory crusher, the product size is not uniform and the oversize is too large, and the uniform feeding is required, and the feeding equipment needs to be set.
The gyratory crusher is a high crushing capacity equipment, mainly used in large and medium-sized concentrators. Compared with the jaw crusher, the main advantage is that the processing capacity is large, and the processing capacity is 2.5-3.0 times that of the jaw crusher under the same width of the mine mouth and the discharge port; the power consumption is less; the crushing chamber lining The board wears evenly and the product size is uniform; the gyratory crusher with the specification of 900 mm or more can be filled with ore, and no mining equipment is needed. The main disadvantages are: the equipment is more complex in construction, the weight of the equipment is large, the foundation is required to be strong, the body is high, and the factory building is required.
The domestic rotary crusher has the common type and the light type. The light type is generally only suitable for the ore with low hardness and low density such as broken limestone ore. In addition, there are two types of jaw crushers and gyratory crushers suitable for special conditions. One is a large-sized disintegrable hoisting crusher, suitable for crushing operations in underground mines; the other is semi-fixed or mobile crusher, suitable for rock or ore crushing in regular or irregular moving positions in open pit mines. operation.
For large and medium-sized concentrators, before determining the use of jaw crushers or gyratory crushers, technical and economic comparisons should be made from the aspects of total equipment weight, installation power, capital investment, operating expenses, equipment configuration and process operation advantages and disadvantages. .
At present, the largest size jaw crusher manufactured and used in production is 1500mm×2100mm, and the largest size gyratory crusher is 1400mm/220mm. Shenyang Heavy Machinery Plant introduced the American Fuller Rotary Crusher technology with a maximum size of 1829mm. Many foreign manufacturers produce 颚 type and gyratory crusher, whose structural parameters and technical performance are not the same. They should be selected according to the manufacturer's data and actual production data.
For medium and fine crushing equipment for crushing hard ore and medium hard ore, cone crusher is generally used: medium crushing is standard type; fine crushing is short type; small and medium concentrator adopts two-stage crushing process, and the second section is medium-sized cone crusher. . In order to match the capacity of the small coarse crusher jaw crusher, a compound pendulum type jaw crusher can be used. The friable ore can be used with a counter roll or a counter or hammer crusher .
The cone crusher is widely used in the concentrator because of its reliable production, large crushing force and large processing capacity. The cone crusher has two types: spring cone crusher and hydraulic cone crusher. Compared with the spring cone crusher, the hydraulic cone crusher is easy to achieve iron protection and automatic adjustment, and the weight and shape are small, but the manufacture and maintenance of the hydraulic and moving cone support structure are more complicated. Since both crushers have their own characteristics, they are widely used and developed at home and abroad.
In recent years, in order to reduce the position of broken products, many improvements have been made to the cone crusher at home and abroad. Allis-Chalmers Company of the United States has manufactured a small cone-distance, high-swing speed hydraulic cone crusher. This technology has been the Shenyang Nonferrous Metallurgical Machinery Factory. Introduced. Rexnord has manufactured the Symons spring cone crusher [including the super heavy cone crusher (SXHD)] and the Gyradisc crusher, which has been introduced for the Shenyang Heavy Machinery Plant. The former Soviet Union developed the inertia cone crusher (KИД), which achieved good results, and the crushing ratio was 10-15 in the open-circuit fine crushing operation.
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