And Northern Region west Guangdong lead zinc flotation tailings using multiple spiral chute reselection recovery of pyrite tailings. The mineral composition of the lead-zinc flotation tailings in Yuebei and Yuexi, the single mineral analysis of pyrite , the multiple analysis of lead and zinc tailings, and the screening analysis are shown in Tables 1 to 4.
Table 1 Mineral composition
Yuebei lead-zinc tailings
Yuexi lead-zinc tailings
And a small amount of pyrite galena, sphalerite; gangue in sericite, quartz, calcite, chlorite most, dolomite and the like.
Pyrite, a small amount of lead-zinc minerals and red and limonite; gangue minerals are quartz, feldspar , kaolinite, sericite, dolomite, calcite.
Table 2 Analysis of single minerals of sulfur-iron and sulfur in northern Guangdong (%)
ingredient
S
Fe
Pb
Zn
Cu
total
Quality score
52.73
43.35
0.49
0.071
0.005
96.85
Table 3 Multiple analysis of lead and zinc tailings in Yuebei (%)
ingredient
S
As
SiO 2
Al 2 O 3
CaO
Ag(g/t)
Quality score
30.5
0.21
16.33
2.80
7.21
64.0
Table 4 Screening analysis results (%)
Size/mm
North Guangdong
Western Guangdong
Yield
grade
Distribution rate
Yield
grade
Distribution rate
+0.2
7.06
14.85
3.73
-
-
-
-0.20+0.10
27.00
23.22
22.31
7.16
2.32
0.71
-0.10+0.076
12.25
33.54
14.62
30.18
14.37
18.68
-0.076+0.043
18.87
35.92
24.12
24.55
31.85
33.68
-0.043+0.030
6.08
38.85
8.41
17.65
32.85
24.96
-0.030
28.74
26.21
26.81
20.46
24.93
21.97
total
100.00
31.46
100.00
100.00
23.22
100.00
In the test, the lead-zinc tailings were sorted by a spiral chute (see Figure 1 for the process) to obtain a pyrite concentrate with a grade of 39.75% to 44.08% and a recovery rate of 58% to 74%.

Figure 1 Test process of Yuebei lead-zinc tailings

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