The pyrite cinder (dry mine) is sieved through a 100 mesh sieve, and the sieved product is ground in a rod mill for 5 min, the grinding concentration is C=70%, stirred for 5-8 minutes, and then the mineral is treated with a spiral chute. The re-selected concentrate and tailings are magnetically selected on the magnetic separator, respectively, and the magnetic field strength is 2500 Oersted. The process is shown in Figure 1: Figure 1 spiral chute - magnetic separation joint process flow chart The test results are shown in the following table: Table spiral chute - magnetic separation test product name Yield(%) grade(%) Recovery rate(%) Fe S Fe S Concentrate I 16.71 64.50 0.225 21.22 2.16 Concentrate II 38.61 59.67 0.214 45.33 4.75 Concentrate III 8.12 61.44 0.258 9.82 1.20 Tailings 36.56 30.75 4.37 22.12 91.89 total 100 50.82 1.74 100 100 The test results show that the above table, sulfur, iron ore slag pretreated under the same conditions, with a spiral chute - can be ideal magnetic sorting index joint process. The grades of the three concentrates were relatively high, reaching 64.50%, 59.67% and 61.44% respectively, the cumulative yield was 63.44%, and the cumulative recovery rate was 76.37%. The content of S can also be reduced to less than 0.3%. Precision Machining Parts,Cnc Milling Machining Parts,Ss Lathe And Milling Parts,Cnc Lathe Machined Parts Shenzhen SCZY Technology Co.,Ltd , https://www.sczyltd.com