New technology and technology for jigging beneficiation (8)

e Large-grained jig The large-size jig is mainly used for the selection of coarse ore. Two models have been made: AM-30 and LTC-75. The former (see Figure 17) has a mineral size of 30 mm and the latter up to 75 mm. Both structures are double-row four-chamber, and the diaphragm movement is driven by the eccentric link mechanism. The ore is layered on the screen surface and then discharged by a V-shaped plate. The bottom edge of the V-shaped plate is a certain distance from the screen surface (AM-50 type is 30~50 mm), and heavy minerals pass through the gap to enter the end of the jib chamber, and are discharged over the concentrate raft after the water flow is agitated. Light minerals move along the V-shaped plate to the sides of the jip room and exit the tailings raft. Table 13 and Table 14 shows the AM-30 Jig process operating conditions apricot hill plot hematite ore and sorting indices.

The screen size of the LTC-75 Jig is 1500×1800 mm, the mechanical stroke is 0~100 mm, and the punching time is 150~160 times/min. The dry magnetic separation tailings (hematite) of Meishan Iron Mine is treated, and the ore size is 75~12 mm. Under the condition of 98 mm stroke and 140 times/min, the ore supply reaches 41.45 tons/hour (normal 30~) 35 tons / Taiwan. Time). The process indicators are: 38.21% of the ore grade, 44.04% of the concentrate grade, 15.98% of the tailings grade, 77.56% of the concentrate yield, and the recovery rate is 90.62%.
AM-30 Jig has been successfully applied in many iron mines, manganese mining country, but LTC-75 Jig, there are still large water consumption and other issues of discharge is not smooth, yet continue to improve.
(2) Moving sieve jig The moving sieve jig is also very early. The simplest moving sieve jig is a manual bucket wash. Place the ore in the sieve frame, then put it into the water tank or bucket, and manually oscillate up and down to achieve stratification, and then pick out the refined and tailings. This method is still used in field exploration or soil processing . The mechanical moving sieve jig used to have the Hancock type in the early stage. It was driven by a ratchet in the lower part. Due to its complicated structure, it has rarely been used. The upper-moving moving sieve jig has few stereotypes at home and abroad. However, because the moving sieve jig has the advantages of water saving, forced loose bed, and no restriction on the size of the ore, it has been paid more attention in the ore pre-selection in recent years.
A three-chamber dynamic sieve jig The three-chamber dynamic sieve jig is shown in Figure 18. This is an upper transmission type made by the former Soviet Union. The screen frame is suspended from the crank lever and supported by a spring. The eccentric mechanism drives the crank lever to move the screen frame up and down. The screen surface is divided into three sections, and the heavy product enters the lower cone by the slit at the end of each section. The light product finally passes over the tailings raft to enter the tailing hopper, and then respectively The bucket elevator is discharged. Equipment performance is shown in Table 15. Used to select manganese ore, the ore size is 35~3 mm, the ore grade is 43.2% Mn, the concentrate grade is 46.0%, the recovery rate is 84.78%, the tailing grade is 32.5%, and it is selected after crushing.