Pyrite-slag shaker-magnetic separation combined process test

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-selected on a shaker. The re-selected concentrate and tailings were magnetically selected on a magnetic separator, each with a magnetic field strength of 2500 Oersted. The process is shown in Figure 1:

Figure 1 Shaker-magnetic separation combined process flow diagram

Four products were obtained: concentrate I, concentrate II, medium mine, tailings. The test results are shown in the following table:

Table Shaker - Magnetic Separation Test

product name

Yield

(%)

grade(%)

Recovery rate(%)

Fe

S

Fe

S

Concentrate I

8.27

63.16

0.260

10.28

1.24

Middle mine

11.55

57.29

0.232

13.02

1.54

Concentrate II

27.34

61.20

0.256

32.92

4.03

Tailings

52.84

42.09

3.07

43.76

93.19

total

100

50.82

1.74

100

100

Table above test results, the sulfur iron ore slag pretreated under the same conditions, with shaking - combined magnetic separation process to obtain products of lower quality iron ore. Although the grades of concentrate I and concentrate II concentrates are relatively high, they can reach 63.16% and 61.20%, but the cumulative concentrate yield and recovery rate are lower, which are 47.16% and 56.24%, respectively.

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