Crushing and screening plant layout design

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In a mineral processing plant, the layout of the crushing and screening plant is closely related to the technical process, equipment, topography, capacity and other factors. In the process of layout design, the relationship between each section should be considered first, the general layout plan should be determined, and then the specific layout should be carried out.

The general layout scheme of the crushing and screening plant is much more. According to the production process, it can be divided into two sections open circuit, two sections closed circuit, three sections open circuit and three sections closed circuit. According to the different configuration mode, it can be divided into single layer and overlap, dispersion and concentration, single and double system and other schemes.

The main advantages of the overlapping configuration are small area of land, short production line, easy management and automation. The disadvantage is that the civil construction is complex and the flexibility is small in production.

The main features of the centralized configuration are the convenient operation and maintenance of the equipment, and the high utilization rate of the lifting equipment and facilities. But when the equipment is too much, the noise in the factory is large, and the dust collecting system is strict. It is mainly used in medium and small mineral processing plants. For example, figure 1 is the two section of one closed centralized allocation scheme, which is mostly used in medium and small minitype beneficiation plant.

crushing plant

Fig1. Two section of one closed centralized allocation scheme

1.feeder;2.jaw crusher;3.spring cone crusher;4.belt conveyor;5.vibrating screen;6. belt conveyor（return）;7. belt conveyor

Figure 2 is the three section of open circuit centralized configuration scheme. The main feature is that the number of equipment is less and the configuration is simple. It is often used in a mineral processing plant with a relatively steep in primary crusher, and secondary & fine crusher are topographic.

crushing plant

Fig2. three section of open circuit centralized configuration scheme

1.ROM hopper; 2.grizzly screen; 3. primary crusher; 4. secondary crusher; 5. vibrating screen; 6.fine crusher

The main features of the dual system configuration are large production flexibility and high production guarantee rate. The shortcoming is that the auxiliary equipment and facilities are more, the investment is large and the management is complex. It is mostly used in large or large mineralprocessing plants.

Figure 3 is the three section of closed circuit single system fragmentation configuration scheme. Commonly used in large and medium-sized mineral processing plants, the quantity of the equipment can be allocated to 1 or more units according to the scale of the concentrator, which is used for the primary and secondary crushing plant with a steep terrain, and the fine crusher with topographic topography.

crushing plant

Fig3. three section of closed circuit single system fragmentation configuration scheme

1.ROM hopper; 2. grizzly screen; 3.jaw crusher; 4. spring cone crusher;5.fine cone crusher;6. vibrating screen

Figure 4 is the three section of aclosed double system crushing and screening allocation scheme, more suitable for large size beneficiation plant. The scheme has a large buffer capacity of the transfer hopper, and the production is relatively stable, so that the working efficiency of the crushing and screening equipment can be fully played.

crushing plant

Fig4. three section of aclosed double system crushing and screening allocation scheme

1.ROM hopper; 2.belt conveyor; 3.jaw crusher; 4.transfer hopper; 5.pre screen; 6.spring cone crusher; 7. distribution hopper; 8.secondary screen; 9. fine cone crusher

Figure 5 is the three section two closed circuit crushing and screening opencast layout scheme. The crushing process is suitable for small and medium size beneficiation plant according to single system and single equipment design. In the scheme, the screen adopts double-layer vibrating screen, the vibrating screen is arranged on the top of the FOB, and the fine product is directly entered into the FOB. The product above screen is moved into the transferr hoppers of the secondary and fine crusher respectively The configuration is compact, and the number of equipment is reduced as much as possible.

crushing plant

Fig5. three section two closed circuit crushing and screening opencast layout scheme

1.ROM hopper; 2. jaw crusher; 3. transpotation station; 4. vibrating screen; 5.FOB; 6.cone crusher; 7. cone crusher

There are various layout modes in the crushing and screening plant. There is no fixed mode in the actual configuration. We should decide on the layout suitable for the project according to the design capacity, equipment type and quantity, topography and climate conditions. Figure 6 is the detail layout drawing of crushing and screening workshop for a 1000tpd lead zinc beneficiation plant.

crushing plant