| On the basis of the production data for50tLDat Jin Steel, thetechnlogical parameters influencing the dephsphorization anddesulfuration in converter steel-making are analyzd. By applyinggray system theory, the degree of association of factors influencing thedephsphorization and desulfuration is found, and the GM(0,N)mathematical models for dephosphorization and desulfuration arebuilt.The order of the factors influencing dephosphorization is asfollows:tf (X6) > qo2(X7) > Rf(X9) > (%∑FeO)f(X8) > (?)n (X5) > [%P], (X3) > [%S]0, (X4The order of influencing factors related to desulfuraton is:[%S]0,(X4) > [%P]0,(X3) >(?)b(X5) > Rf(X9) > tf(X6) > qoz (X7) > (%∑FeO)f,(X8GM(0, N)models for dephosphorization and desulfuration are:np = 0.2279[%P]0, -0.3356[%S]0, -3.9403(?)b-0.0035tf + l.0664qQ2+l.744l(%∑Feo)f, +l3.9958Rf(?)s=-0.2737[%P]0 + 1.l106[%S]0 + 5.7957tb-0.0264tl-0.5777qO2-0.3574(%∑FeO)f+5.0205RfThen, the multivariable linear regression models for dephosphorization and desulfuration in converter steelmaking are established too.By and comparing the two models, the applicabilty ofthe GM(0,N)model in converter Steel-making system is certified. Theprecision checkin results of the GM(0, N)model also indicated that thismodel is precise and Prevalen.Finally the optimizing program of linear multi-objective-planningis Worked out, and the optimized technological conditions of dephosp-horization and desulfuration in 50tLD converter steel-making are obtained: [%P]0:93xl0-3～l14 x10-3%; [%S]0,:42x10-3 ～ 52x10-3%;(?)4:l4～16min;Tf:1630～l670℃; qo2:45～5lm3/t; (%∑FeO)f,:l6～20%; Rf,:3.0～3.5. |
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