钛铁渣制备含TiCN复合材料及其反应动力学

Preparation of composite material containing TiCN from ferrotitanium slag and reaction kinetics

为了实现钛铁渣的有效利用,以钛铁渣、焦炭和SiO_(2)为原料通过碳热还原氮化法制备了含TiCN的复合材料,研究了工艺条件对反应产物的影响。TiCN的最佳合成条件为在流动氮气下经1400℃保温4 h,且焦炭加入量的增加可促进TiCN的生成。采用Kissinger法、Ozawa法和Coats-Redfern法研究了以钛铁渣为原料制备TiCN的反应非等温动力学。反应的最概然机制函数为G(α)=[-ln(1-α)]^(3),反应机制为随机成核和随后生长,反应级数n=3。反应的活化能E=115.34 kJ·moL^(-1),指前因子A=6.76×10^(47) min^(-1)。

To realize the effective utilization of ferrotitanium slag,TiCN containing composite material was synthesized by carbothermal reduction nitridation with ferrotitanium slag,coke,and SiO_(2) as raw materials,and the effects of technological conditions on the reaction products were studied.The optimal synthesis condition of TiCN is 1400℃insulation for 4 h with flowing nitrogen,and the increase of the coke addition can promote the generation of TiCN.The non-isothermal kinetics of the reaction of TiCN prepared from ferrotitanium slag were studied by the methods of Kissinger,Ozawa,and Coats-Redfern.The most probable mechanism function of the reaction is G(α)=[-ln(1-α)]^(3),the reaction mechanism is random nucleation and subsequent growth,the reaction grade n is 3,the reaction activation energy E is 115.34 kJ·moL^(-1),and the pre-exponential factor A is 6.76×10^(47) min^(-1).