1、19 1 武 汉 冶 金 科 技 大 学 学 报 Vol. 19, No. 11996 M3Journal of Wuhan Yejin University of Science and Technology March 1996h M V s; l a(炼铁教研室)K1 作者应用传热学的理论,定量分析了铁水传搁过程中温降的影响因素,及各种减少铁水温降措施效果的优劣。其结论可推广至钢水传搁过程温降的分析,对生产中进一步挖潜节能有一定的指导作用。1oM:温降;铁罐;保温ms |: TF0010 -M # V.Vv。BM V (1470, 110P。 V (1670, W80P。/ v ? n,
2、7 OY 3/ 6S。 d9,M h 50, V Vl15 20kg /t, 8 V Vl20 25kg /t, V4,h h。h .V“ V,9Fl , V -# p ,4,h h。yN,M V“1C Lil,i“ 6rm。Y M h 6rm /:M (h 50,9Fl20kg9, M500tM 。 8 , VM7 F ,#M M7F 。(1)| LM7CTr65mm 。 ! ( “ j= 0. 34W /(m2 )( 800 H0. 2 0. 5W /(m ),5Q1 = 2c(tl - t )111r1- 1r2 +1j1r2- 1r3 +131r3- 1r4 +1TC1+ Tr1= 8
3、607. 960. 203 = 42403. 8W152946kJ/hQ2 = 2cH(tl - t )11 lnr2r1 +1j lnr3r2 +13 lnr4r3 +1TC2+ Tr2= 14633. 540. 2519 = 58094. 96W209543kJ/hQ3= 873355kJ/ht60= Q1+ Q2+ Q3dT VTCT = 1235841600000. 7865926 /ht80= 1235841800000. 7865920 /h21t100= 12358411000000. 7865916 /h Y765mm , ?h M 3 /hP。(2)MA 65mm F“ rT
4、 , ( “j |0. 34W /(m), V N HTC3= 2. 77W /(m2) ,Tr3= 12. 7W /(m2)。#Q3= cr21(tl - t )(Sj /j )+ 1/(TC3+ Tr3 )=7273. 730. 2558= 28433. 3W102556kJ/hYM7 M ,5 V :t60= 15 /h, t80= 12 /h, t100= 9 /hYM7 H#M F ,5 V :t60= 6 /h, t80= 5 /h, t100= 4 /h Y7M1,7 F ,M ( l H Vh 11P。7 7M ( l H Vh 18P。 . HW (1. 5h9, | n 7
5、 V PM h 24P。(3)yM Mv, M 7F ,h M rTKz。 YM7 p #?,1 b7 T, rT| Kz(1 b7 T s )。2. 2 M7 QX2. 2. 1 计算M “ ,M7 9| M 。M , |%M7 9 M - , | % b7 HW 。y b7 V B . V,M7 HWh,yNM77, B H Y (t-,5M7 H Q= -dGVGCG dt-dfT: GM7;dGVGM7 ; CGM7 。V. A,M7 h b7 H ,-dGVGCGdt-df= (T-C+ T-r)F(t- t )T: FM7 , m2;T-C (1 “ , W /(m2 );T-r
6、( “ ,W(m2 )。 VQ= t- t , SHqQ(0)= t-0 - t sZs M s,t- tt-0- t= e- (T-C+ Tr) F /(dGVGCG) f Y7, VM7s pM7 S (:t-0= 584 V - (T-C+ T-r )FdGVGCG= (T-C =+ T-r =)F =+ (T-C+ T-r)FdMVMCM+ dVC= - 0. 028T: =M7 =V ;M7V ;MM7C;M7 。22 b79 :QX =0 - dGVGCGdt-dfdf= dGVGCG(t-0 - t ) = 10369893kJ/hb7fl H #M sY:Qf=f0 - dGV
7、GCGdt-dfdf= dGVGCG(t-0 - t )(1 - e- 0. 028f), kJ/htf= QfdT VT CT= dGVGCGdT VTCT (t-0- t ) (1- e- 0. 028f), T V , b78h,M7 9 60t, 80t, 100tM HsY:t60= 45,t80= 34,t100= 27b74h,M sY:t60= 23,t80= 18,t100= 147 9 M |:QXdT VTCT= dGVGCGdT VT CT(t-0 - t )= 165 b71 i HW200h。2. 2. 2 分析V 9 V A,M7 M M 、 b7 HW、M7 、
8、M7 “ y 1。7h M7 Krn b7 HW “ 。 b7 HW8h 4h,M ( Vh 16P。yN,4M7 q h M rn B。 “ , VYV M7 Hq LC。FM7, V :(T-C+ T-r )F= 0. 0077N H b78hM sYt60= 13,t80= 10,t100= 8b74hM sYt60= 7,t80= 5,t100= 4FM7 ?vM7 , ( Vh M 24P。3 (1)M V 9110P, 70%P M . #M79 M H 。(2)7M M ( l H25P,M7 M (34P,. HW (90min9,M #M7 (70P。(3)h M n ,M7
9、F Krn , H Vh M M7 , ( Vh M 42P。(4) V ? b7 HW4M7 9M , ( ?h M 15P。(5) ? H |M7F、4M7 9M # b7 HWn ,5 ( ?h M 55P。 M500tM , V 8S 6tP,6rmVB $。23(6)YM y , T V y Yvl,#hM n rTz。y ,YKv M7 n , Q b7 HW#M 9。. HW |90min, |30 H, W1“nm2。m2 b7 HWM 1“ I D1 W I. .: ,19802 v. VM M. M, 1986( 3)3 17 . VM .M,1993( 8)4 . VF
10、k. , 1994( 4)T HEORETICAL AN ALYSIS TO REDUCE TEM PERATUREDROP OF HOT M ETAL IN TRANSPORTATIONZeng XiaoningAbstrarct: In this paper, the theory of heat transfer was used to analyse the influence factorof temperature drop during transportation and to discuss the result of technology measures toreduce the temperature drop of hot metal.Keywords: temperature drop; hot metal ladle; holding temperature24
