Table 1, Table 2, and Table 3 are the results of spectroscopic analysis, multi-element analysis, and iron phase analysis of pyrite cinder. Table 1 Spectral analysis results of pyrite cinder (sintering) element Al Si Mg Pb Fe Ti Mo Ca Cu Ag Zn content(%) 0.1 >10 0.1 0.1 >10 0.1 0.01 1.0 0.1 0.01 1> Table 2 Multi-element analysis results element Fe SiO 2 CaO MgO Al 2 O 3 S TiO 2 As content(%) 50.82 12.07 3.35 1.29 1.90 1.74 0.28 <0.1 element Pb Zn Cu Mn P Ag Mo content(%) 0.34 0.57 0.70 0.087 0.014 14.7g/t 0.0059 Table 3 Iron phase Sulfate Sulfide Silicate Magnetic iron oxide Non-magnetic iron oxide and others Total amount Fe (%) 0.13 <0.10 0.53 10.60 39.45 50.82 According to the above table data, iron is the main recyclable element in the slag, and the content of other elements is low, which does not meet the requirements for comprehensive utilization. According to the standard of iron concentrate, the content of elements S, Cu, Pb and Zn exceeds the requirements for the content of harmful elements, and should be removed when producing iron concentrate. Table 4 shows the analysis results of the slag screening analysis. It can be seen from the above that S in the slag is mainly concentrated in the coarse-grained grade. The iron is mainly concentrated in the fraction of -0.1 to +0.019 mm, and the grade of iron is high. The content of S is relatively low. Also, the content of Zn and SiO 2 is higher in the level of +0.15 mm. Iron has a lower grade in this class, and the +0.15mm level only accounts for 3.9%. Table 4 Results of sieve analysis of slag Granular grade Yield(%) grade(%) Fe S Pb Zn SiO 2 +0.28 2.38 26.20 2.66 0.75 1.21 30.34 -0.28+0.15 1.56 28.12 1.08 0.36 1.16 38.73 -0.15+0.1 4.73 47.48 0.46 0.23 0.81 21.68 -0.1+0.074 18.42 57.59 0.40 0.22 0.59 11.43 -0.074 + 0.037 37.64 60.22 0.20 0.18 0.44 8.29 -0.037+0.019 24.50 53.36 0.22 0.36 0.56 14.19 -0.019+0.010 4.99 42.04 0.41 0.79 0.79 23.00 -0.010+0.005 0.9 37.89 0.56 0.94 1.01 25.50 -0.005 4.84 9.34 0.20 0.42 0.26 8.35
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