ZBS改性剂对焦炭微观结构和热性能的影响

Effective of ZBS Additive on Coke Microstructure and Thermal Properties

对安钢、昆钢的系列焦炭进行喷洒焦炭改性剂(ZBS)溶液实验,用扫描电镜、HY-4型全自动显微光度计对喷洒ZBS前后昆钢焦的微观结构进行检测分析.根据GB/T4000-1996测定焦炭反应性(CR I)和反应后强度(CSR).结果表明:与没喷洒ZBS的焦样比,喷洒ZBS后焦炭孔隙相对小、少,焦炭气孔率p降低.在空隙的周围形成了亮白色的筋带———ZBS碳化物,与碳结合紧密,而且在气化反应2 h后仍然存在,有利于反应后强度提高;ZBS能明显改善焦炭热性能,焦炭热性能越差的焦炭,ZBS对其改善的幅度越大.

A series of experiments were carried out on the coke sprayed with ZBS of Anyang and Kunming Iron ＆ Steel Co. , Ltd on the reaction electrical furnace. The mlcrostructure of coke before and after spraying with ZBS were investigated with SEM and HY -4 Automatic microdensitometer. Coke reaction index and coke strength reaction were investigated according to the GB/T4000 - 1996. The results are as follows ：Compared to original coke sample, the pore space become relatively little and small, and the coke hole rate is reduced. The ZBS carbide with brilliant white rib formed around the gap, existed in the coke reacted 2 hours, and it can improve CSR. ZBS can obviously improve coke thermal properties. The worse coke thermal properties are, the bigger the margin improved by ZBS are.