1、Feb.2023Vol.52.No.1(Sum 298)2023 2 52 1(298)YUNNAN METALLURGY、。、。、*2022-04-27 1974-。1984-E-mail。202205AD160028。Feb.2023Vol.52.No.1 Sum 298 2023 2 52 1 298 YUNNAN METALLURGY*661000、76.54%77.69%0.123 t/t 0.09 t/t 10 11。TD451 A 1006-0308 2023 01-0162-05Study and Application on Treatment of High Iron-be
2、aring Tin Concentrateby Top-blow ConverterYANG Zuo-di,XIE Yun-hua,KONG Mei,YUAN Hai-bing(Yunnan Tin Co.,Ltd.,Gejiu,Yunnan 661000,China)ABSTRACT Tin concentrate has larger changes in recent years,the development and utilization of tin-lean ore is more often,theimpurities content in tin concentrates w
3、ere rising constantly,among the impurities,the increasing of iron content is more prominent,it hasbig influence to reduction smelting of tin concentrates,it makes decreasing of direct recovery rate,increasing of unit consumption of coal,and decreasing of life time of refractory material and so on,fo
4、r the above mentioned problems,the reasonable slag density shall beselected,and the trend of iron element shall be controlled,the coefficient of excess air inside the furnace and slag volume shall becontrolled,the silica acidity and the temperature shall be controlled properly,then the direct recove
5、ry rate was increased from 76.54%to 77.69%,coal unit consumption was decreased from 0.123 t/t to 0.09 t/t,the life time of refractory material inside the furnace wasincreased from 10 months to 11 months.KEY WORDS tin;reduction smelting;high iron-bearing tin concentrate;furnace slag;sedimentation sep
6、aration 162、1。、。1“”。、-、-、-、-SnO2 Sn FeO SiO2 2 1 5。SnO2 s+C s=Sn l+CO2 g 1 SnO2 s 2CO g Sn l 2CO2 g 2 C s CO2 g 2CO g 3 Fe 2O3 s+CO g=2FeO s+CO2 g 4 FeO s+SiO2 s=FeO SiO2 s 5、。2。、。1。1 14.68%18.37%。15%。3、。3.1 SnO、2。Sn Pb As Fe S Cu Zn 49.58 0.042 0.088 18.373 0.585 0.087 0.135 54.94 0.572 0.332 14.67
7、7 1.257 0.110 0.122 52.96 0.064 0.898 15.283 2.850 0.050 0.048 50.86 0.051 0.993 16.433 2.940 0.127 0.026 1 Ta.1 Composition of tin concentrate%Sn/%FeO/%SiO2/%CaO/%/g/cm 3/%/k 5 7.15 42.77 20.66 5.32 3.89 76.54 0.9991 3.02 39.32 21.49 6.04 3.71 77.69 1.0954 5.55 41.70 19.90 5.42 3.83 76.89 0.9812 4.
8、50 39.97 21.13 7.57 3.75 77.35 1.0203 5.10 40.02 20.94 6.73 3.80 77.03 1.033 2 Tab.2 Comparison table for high iron-bearing slag and its direct recovery rate 163Feb.2023Vol.52.No.1(Sum 298)2023 2 52 1(298)YUNNAN METALLURGY 2/3。3.2、1 CO SnO2、Fe2O3 Sn、FeO。Fe2O3 3。3 4 3 2 SiO2。3.3 4。1 2。3。4。4.1。1 100 1
9、 200。0.2 Pa s 1 200 1 300 1.5 0.2 Pa s。4.0 g/cm 3 2 g/cm 3 5。-。1.5 2 g/cm 3 FeO。Sn/%Pb/%As/%Fe/%S/%Cu/%/t/t 4 54.940 0.572 0.332 14.677 1.257 0.110 0.0901 49.580 0.042 0.088 18.373 0.585 0.087 0.1202 50.860 0.051 0.993 16.433 2.940 0.127 0.1133 52.960 0.064 0.898 15.283 2.850 0.050 0.105 3 Tab.3 Com
10、parison table for high iron-bearing material and coal consumption 164。Fe Fe、6。4.2 Fe 2O 3、Fe 3O 4 FeS SO 2。Fe2O 3 1 200 0.88 FeO SiO 2 7。K FeO FeO。、。1 050 1 200 1 150 7 3 2。SiO 2 SiO 232%46%FeO 35%55%CaO 5%25%。4.3、。K 1.1 1 050 1200 1 150 8 SiO 232%46%FeO 35%55%CaO 5%25%。5、4。4 76.54%77.69%/%/t/t/g/cm
11、 3/%/k 5 76.54 0.123 3.89 76.54 0.9991 77.69 0.090 3.71 77.69 1.0954 76.89 0.120 3.83 76.89 0.9812 77.35 0.105 3.75 77.35 1.0203 77.03 0.113 3.80 77.03 1.033 4 Tab.4 Application results 165Feb.2023Vol.52.No.1(Sum 298)2023 2 52 1(298)YUNNAN METALLURGY 0.123 t/t 0.09 t/t 10 11。6 1 0.2 Pa s。4.0 g/cm 3 2 g/cm 3 2 0.88 FeO 3 1.1 1 050 1 200。1.M.2005.2.J.2003 32 2 10-141.3.J.2014 4 108-110.4.M.2007.5.J.1994 1 54-57.6.J.1988 1 12-15.7.J.2015 23 47-488.J.2016 5 28-30.166
