摘要
为提高高灰熔点潞安煤对大规模煤基合成油气化工艺的适应性,采用灰熔点测试仪、XRD射线衍射、热重分析仪等测试手段,研究了添加助熔剂和配煤2种灰化学性质调控方法对潞安煤灰熔融特性及气化反应性的影响,提出了山西潞安集团180万t/a煤基合成油项目气化工艺.结果表明：助熔剂的质量分数为0～7%时,CaO,Fe2O3,MgO使灰流动温度降低的最大值分别为150,73,68℃,随着助熔剂含量继续增加,Fe2O3,MgO的助熔效果明显提高.在考察的实验范围内,平均每加入1%的神木煤,灰熔融温度降低约3℃.莫来石含量的逐渐降低及铁橄榄石和钙铝榴石的不断形成是混煤灰熔融温度下降的主要原因.潞安原煤中的原生矿物质对煤焦气化反应性影响很小,添加助熔剂和配煤能显著提高煤焦的气化反应性。
To enhance the suitability of Lu＇an coal with high ash fusion temperature（AFT）to largescale coal-based oil synthesizes process,the influences of two ash chemical properties regulation methods,coal blending and flux addition on the ash fusion temperature and gasification reactivity were investigated using ash fusion detector,X-ray diffractometer,thermogravimetric analysis and so on.A novel technology for the 1.8 Mt/a coal-based oil synthesizes project of Lu＇an Group was proposed.The results show that CaO,Fe2O3 and MgO can decrease the AFTs of Lu＇an coal by 150,73and68℃respectively when the addition amount is less than 7%.With the continuous increase of the flux,the fluxing effect of Fe2O3 and MgO increases significantly.Within the range of the experimental investigation,the AFTs of Lu＇an coal decrease about 3℃for each 1%of Shenmu coal addition.It is the gradual reduction of mullite and the formation of fayalite and hessonite in blended coal ashes that lead to the decrease of AFTs.The primary minerals in Lu＇an raw coal have little impact on the gasification reactivity of Lu＇an coal char,while adding flux and Shenmu coal char can increase its gasification reactivity significantly.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2015年第4期720-725,共6页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(21376142)
中国博士后科学基金项目(2013M541940)
关键词
灰熔融性
气化工艺
配煤
助熔剂
气化反应性
灰化学性质
ash fusion characteristics
gasification technology
coal blending
flux
gasification reactivity
ash chemical properties
