The pyrite cinder (dry mine) is sieved through a 100 mesh sieve, and the sieved product is ground in a holding mill for 5 min, the grinding concentration is C=70%, stirred for 5-8 minutes, and then subjected to two-stage magnetic separation. The magnetic field strength is 2500 ohms and 3000 ohms respectively. One magnetic separation concentrate and two-stage magnetic separation concentrate are combined into the final concentrate. The second-stage magnetic separation tailings are re-elected on the shaker to obtain the middle and tailings respectively. . The process flow is shown in Figure 1. The table below shows the test results. Figure 1 Two-stage magnetic separation-shaker process flow chart Table 2 magnetic separation - shaker test product name Yield(%) grade(%) Recovery rate(%) Fe S Fe S Concentrate I 30.63 61.23 0.286 36.91 5.03 Concentrate II 12.39 63.22 0.272 15.41 1.94 Tailings 56.98 42.53 2.84 47.68 93.03 total 100 50.82 1.74 100 100 The results in the table show, the sulfur in the iron ore slag pretreated under the same conditions, with a two-stage magnetic separation - combined shaker test process, although possible to obtain high concentrate grade, 61.23%, and 63.22%, respectively, The content of S is also relatively low, and can be reduced to less than 0.3%, but the concentrate yield and recovery rate are not high. The cumulative yield of concentrate I+ concentrate II is 43.02%, and the cumulative recovery rate is 52.32%. Automatic Sliding Door Series and door accessories automatic doors is the introduction of European advanced technology imported from Germany and configuration , Using the principle of rotating suspension developed luxury automatic door products ,Advanced control system imported from Germany and the motor and reducer , More Comprehensive security requirements of the systems ,showing the beauty of fashion automatic sliding door series,automatic doors,automatic doors motor,fast sliding doors,quickly doors SHENZHEN HONGFA AUTOMATIC DOOR CO., LTD , http://www.hongfahss.com