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 re-elected by a spiral chute. The obtained tailings were further shaken to obtain the middle and tailings respectively. The process flow is shown in Figure 1:
Figure 1 spiral chute - shaker process flow chart
According to the test results in the following table, under the same pretreatment conditions, the slag can obtain 62.34% concentrate grade, 57.49% cumulative recovery of I+II, and iron concentrate containing less than 0.3% sulfur.
Table spiral chute - shaker test
product name | Yield(%) | grade(%) | Recovery rate(%) | ||
Fe | S | Fe | S | ||
Concentrate I | 24.76 | 62.34 | 0.271 | 30.37 | 3.86 |
Concentrate II | 32.64 | 58.65 | 0.236 | 37.67 | 4.43 |
Tailings | 42.60 | 38.13 | 3.76 | 31.96 | 91.71 |
total | 100 | 50.82 | 1.74 | 100 | 100 |
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