Corex熔融气化炉煤焦混合料柱特性研究

Research on Characteristics of the Coal and Coke Mixed Stock Column in the Corex Melter Gasifier

在宝钢Corex工厂休风时,进行了熔融气化炉风口取样分析,得出了纯氧鼓风熔融气化炉煤焦混合料柱结构特点,并通过光学显微镜对粉末进行鉴别,得知料柱粒度分布结构形成的机理。利用XRD对风口水平焦的石墨化程度进行分析,并以此来推断其在炉内的高温历程。结果表明,气化炉料柱炉料的平均粒度小于7.7mm,是制约料柱透气性的关键因素,而块煤在炉内劣化严重,是导致料柱透气性差的主要原因。在此基础上,提出改善料柱结构和提高炉缸透气透液性的措施。

Tuyere coke probing was conducted at Baosteel Corex Plant in order to get better understanding of the structure of char bed in melter gasifier(MG). After screening,the specimens were observed by optical microscope to determine the mechanism of char bed formation. X-ray diffraction(XRD)was used to clarify the degree of graphitisation and inner thermal history of the coke. The results show that the mean size of the grains at tuyere level is less than 7.7 mm. It is the main factor that restrains the permeabili...