Experimental study on combined process of pyrite cinder spiral chute-magnetic separation
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%.
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