Q.Lu
,
L.Y.Sun
,
Y.Xu
,
Q.F.Chai
金属学报(英文版)
This paper studied the changing principles of carbon content in direct reduction iron (DIR) and liquid iron in the COREX melting gasifier.Under the normal working conditions of experimental equipment,liquid nitrogen was poured into the meling gasifier from its tuyere to cool down quickly.And then seven cross sections were made to study the carburization reaction and its characteristics of the solid iron and the liquid iron,and also the reaction of carbon between the slag and the metal.According to the results,the influences of the thickness of the semi-coke layer and the temperuture on the carbon content of liquid iron in the COREX meltion gasifier were confirmed.
关键词:
melting gasifier
,
null
,
null
刘起航
,
张亚楠
,
折媛
,
吴铿
中国冶金
doi:10.13228/j.boyuan.issn1006-9356.20160185
为了研究块煤在熔融气化炉内高温结构演变和降解机制,采用扫描电镜和光学显微镜观察了COREX熔融气化炉风口焦和实验室自制半焦的形貌和显微结构,并结合不同试样的高温反应特性,确定了不同风口焦试样的来源.结果表明,风口焦中兴隆庄块煤形成试样含有较多的中粒和粗粒镶嵌结构,表面呈孔状结构;大同块煤形成试样中类丝炭较多,表面呈层状结构.根据结果提出应考虑灰分对煤焦高温强度的影响,在测量风口焦试样的反应性及反应后强度时应考虑灰分含量进行折算,并确定了以灰分的基准含量为13%进行折算为最佳条件.
关键词:
块煤
,
熔融气化炉
,
风口焦
,
半焦
,
灰分
