攀钢高炉渣碳氮化处理中矿化剂对碳氮化钛晶粒的影响

对攀钢高炉渣还原氮化处理,使碳氮化钛晶粒长大到适合的尺度,以便于选矿,最终提取TiC,TiN及TiO2·还原氮化处理后炉渣的X射线及扫描电镜检测发现,渣中的钛组分完全富集于碳氮化钛一相·还原氮化处理时通过向渣中分别加入矿化剂CaO,K2CO3,Na2SO4,改变了液态炉渣的性质,可有效地促进碳氮化钛晶粒长大,其中加入K2CO3的炉渣样品中碳氮化钛晶粒最大,其中最大粒径可达30μm左右;无任何矿化剂的炉渣样品中碳氮化钛晶粒最小且无聚集长大的趋势·

Impact of Mineralizers on Titanium Carbonitride Grains During Reductive Carbo-Nitridation for PANSTEEL BF Slag

The titanium compounds in PANSTEEL BF slag were enriched in titanium carbonitride via reductive carbo-nitridation process so as to enable the grain size of titanium carbonitride to grow up properly, thus facilitating the slag benefication and finally the extraction of TiC, TiN and TiO2. After the reductive process, the phase composition and microstructure of slag were characterized by XRD and SEM. The results showed that the titanium components are fully enriched in titanium carbonitride phase, and that adding such mineralizers as CaO, K2CO3 and Na2SO4, in slag which could in the reductive process can modify the liquid slag properties and accelerate effectively the titanium carbonitride grain growth, among which the maximum grain size up to about 30 μm is found in the samples which K2CO3 was added in. Meanwhile, the minimum grain size is found in the samples which no mineralizer was added in and shows no trend of grain aggregation growth.