氧气顶吹转炉炼钢工艺.doc

41 .1. ,.,.,;,.2. :.Fe3C,.: C=1.74.5%: C 1.7%CSiMnPS3. 54.00.61.60.20.80.00.40.030.070.061.500.10.370.250.800.0450.050.050.270.070.250.700.0450.054. : ;,CO,CO,H,N. (P,S);P,S,P,S.P,S,P,S. ;(,)H,N. ;,.,Si, Mn,.().12501300,1650,.5. ,.P,S,(,),P,S,.,.,.1. Si(34).,Si,Si,Si.Si+O2=(SiO2) ()Si+2O= (SiO2) ()Si+(FeO)=(SiO2)+2Fe ()2(FeO)+(SiO2)=(2FeOSiO2),2FeOSiO22CaOSiO2,SiO2CaO,SiO2,FeO,Si,1530,COSiO,(CaO)(SiO2)2CaO.SiO2,C(SiO2).,:Si;Si(SiO2),;C%SiP0.P0:A. (450530cmMs),M=1.82.1.B. .P0=0.7841.176MPa.P:.P=0.1180.125MPa.,H,m.,.,.1. ,.:H=(3746)PD P,MPa;D,mm;H,mm.,-: .,(SiO2),(P),(FeO)2530%;,C2S ,.,. .,.,(FeO),S,P,(FeO)1015%. .,C-O,(),. .,.2. A. ;B. ,Si,P,S;C. ,;D. ,;E. ;F. ,.,.A. :,(FeO),-.,(FeO),.B. :,;,.,.C. :,.D. :,(FeO),(FeO).E. :,.F. ,.G. a ,;b ,;c ,.H. a ,;b ,;c ,.I. ,.,.,.1. ,;,;.2. ,.3. .,(FeO)2530%,.,(FeO)1015%,.,(FeO).:95TA. :,200mm.:(1.1m).B. :1.72.0m;:1.41.7m;:1.21.4m;,0.10.2m.:95T(a)Si0.70%,0.10.2m;Si ,P,Si1%),P,S,.:.P,.,Si,P.,25%,30%;,10min.:1,.3.:(,(FeO),.:,60%70%,95%,.:,.,.,30100kg,40100kg,;70%80%;,.,.,.1. :(,).:,:1/22/3();1/21/3.2. . ,(306 min)(, ,;,(FeO).,:,;:,).,34.,.1. ,A. (P0.3%),(kgMt)%CaOCaO,%CaO=(%CaO)-R(%SiO2),.:B. (P0.3%),(kgMt) ,(%SiO2)(:,),.: SiO28%,3.0,80%,kg = 83.0/80 = 0.3(kg)Si,1520kg.2.MgO.MgO8%10%,MgO,.W(kg/t)=W/=W-W-W3.:,4kg/t.:,25%.4.1:1t85%,10%,5%,T5kg,3kg,0.5%,85%,.3.5.:1t%Si0.500.101.40%CaO37.583%SiO2362.56.05.0:100085%0.5% = 4.25 (kg)SiO2CaOSiO2:(kg)2:%CaO%SiO2%MgO832.54.09502.03777:(MgO)=9.66%,8.2%,0.05%,.:(MgO):A. .C. MgO.D. MgO. 168.39kgMt.MgO:68.394.09% =2.80 (kg)MgO:10000.05%77%=0.385 (kg)1tMgO:10008.2%9.66%=7.92 (kgMt) = 68.39 - 8.62 + 1.21= 60.98 (kg)3:100t,Si:0.4%,P:0.1%.,3.5,3000kg,MgO,2500kg.:CaO: 91.6% SiO2: 1.6%:SiO2: 8%:MgO:35% CaO:55% SiO2: 2%(kg,).: = 5454+203-1599 = 4085 (kg).,.,.Mn P,.Mn P.:() Mn P Fe (kg) % kg % kg % kg 28000 0.40 112 0.20 56 4000 0.50 20 0.02 0.8 1000 0.30 3 0.10 1.0 56.0 560 135 57.8 560(MnO)% %Mn (P2O5)% %P 0.12 0.03 3.30 2.56 2.86 1.25 28000+4000+560=32560kg(90%)3256090%=29304kgMn 293040.12%=35.16kgP 293040.03%= 8.79kgMn 135-35.16=99.84kgP 57.8 - 8.79=49.01kgMn P:1:, 2 ,3 45 6.45 :,.,.,.,.,.,;,.1. ,.2. ; ,; ,.1. .,.,.1200,25,CO:C1473+O2298=CO1473 H1473K= -137520 J/mol1kgCCO137520/1211300kJ/kg.100kg,.15%,10%,:Q=MCT Q1kg,kJ/kg;M,kg;C,CL0.841.0kJ/kg,CS1.23kJ/ kg.1200COCO,1kg:1kg100kg1%,1%.CO2,.,COCO2,.,.,1400,0.5%,3%,71249,.2. :;().,70%,10%,.P,S,.,;,.,.3. ().,;, ,.:,: ; ,; ,C,Si,P,(). 6070%.:=100%,70%,.,.1. :2030(,).,80120.2. TT =T +t+T T ,.T=1539-ti%i-7 ;t,.,.T.T=t1+t2+t3+t4+t5t1,.t2,.t3,.t4,.t5,.1. .,;,.,;.,().2. kg,q,kJ/kg.:Fe2O3,Fe2O370%,FeO10%:q=1Ct+1(Fe2O3%112/1606456+FeO%56/724247)=11.02(1650-25)+209+1(0.7112/1606456+0.156/724247)=5360 kJ/kg:,1500,25,:q=1C(t-25)+ C(t-t)=10.7(1500-25)+272+0.837(1650-1500)=1430 kJ/kg:,50%FeO,40%Fe2O3 ,:q=5311 kJ/kg1,(49).3. :,.,(:.():,.,.) ;,.:,812%,10%.:(Q-10q)/q=(30000-101430)/5360=2.93 kg100kg10kg2.93.4. ,.30t:0.1%,815;:10,6;:1,8;:0.01%,3;1,100kg(15kg,10kg):1001.05+151.235+101.235=136 kJ/100kg136/5360=0.025 kg,136/143