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神华煤灰掺混木屑灰在O_2/CO_2气氛下的烧结特性
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作者 周斌 周昊 +1 位作者 王建阳 岑可法 《浙江大学学报(工学版)》 EI CAS CSCD 北大核心 2016年第3期468-476,共9页
利用CCD监测系统和自制烧结探针研究神华煤灰掺混不同比例的木屑灰在O_2/CO_2气氛下的烧结特征,实时在线监测灰块在烧结时的形状特征.结果表明:掺混木屑灰对混合灰块的高度影响较少,而对横截面积影响较大.当木屑灰比例为0、25%、50%、75... 利用CCD监测系统和自制烧结探针研究神华煤灰掺混不同比例的木屑灰在O_2/CO_2气氛下的烧结特征,实时在线监测灰块在烧结时的形状特征.结果表明:掺混木屑灰对混合灰块的高度影响较少,而对横截面积影响较大.当木屑灰比例为0、25%、50%、75%和100%时,相应的高度收缩率分别为0.127、0.119、0.134、0.124和0.136,而横截面积收缩率则分别为0.125、0.150、0.074、0.117和0.164.各灰块在烧结探针上经过烧结处理后,其横截面都具有三层层状结构,且每层的颜色和烧结程度都不同.利用XRD技术对每层的矿物质分布进行分析,结果表明:对于掺混不同比例的生物质灰,其混合灰块的矿物质种类和含量都有很大变化,尤其是最外层.对各灰块的层状结构进行SEM分析,发现掺入木屑灰后,灰块最外层孔状结构变小.同时,加入掺混木屑灰能够使得灰块最外层的横截面结构光滑致密. 展开更多
关键词 烧结 木屑灰 混合 O2/CO2
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Serpulids and their paleoecology of the Paleogene Kalatar Formation in southwest Tarim Basin of China 被引量:1
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作者 YANG HaiJun SHEN JianWei +3 位作者 ZHANG LiJuan LI Meng HUANG ZhiBin WANG Yue 《Science China Earth Sciences》 SCIE EI CAS 2012年第7期1087-1100,共14页
Polychaete serpulids are globally distributed tubeworms mostly in marine environments from Late Triassic to modem time. These calcareous tubeworms could be rock-forming, reef-building, or a principal fouling organism ... Polychaete serpulids are globally distributed tubeworms mostly in marine environments from Late Triassic to modem time. These calcareous tubeworms could be rock-forming, reef-building, or a principal fouling organism in harbor and bays. Car- bonates of the Paleogene Kalatar Formation in southwest Tarim Basin yield abundant serpulid fossils, which, together with oyster fossils, constitute the characteristic fossil assemblage of the Kalatar Formation. Other common fossils include bivalves, gastropods, ostracods, echinoderms, and bryozoans. Lithologies that yielded serpulid fossils are characterized by micritic bio- clastic limestone, sandy limestone, and shelly limestone, indicating a semi-restricted to open shallow marine environment with medium to low water energy. The research data about serpulids and their fossil materials from China are relatively rare. Based on the studies of tbssils taxonomy, community palaeoecology, and fossil taphonomy, this paper analyzed and studied the types, occurrence, distribution, and morphological characteristics of serpulids and their palaeoecological features in the Kalatar For- mation. Two serpulid community compositions were recognized in the Kalatar Formation, including a rock-forming Ditrupa community and a cluster-growth Propomatoceros community. The Ditrupa community was distributed in coastal environment of the west Kunlun piedmont, lived on sandy hard substrates with little mud, and rarely occurred in lagoon and tidal settings. The Propomatoceros community occurred in offshore middle carbonate ramp in the piedmont of the south Tianshan Moun- tains and in offshore shelf in the piedmont of the west Kunlun Mountains. According to the analysis on the host-rock litholo- gies, preservation and symbionts, it is inferred that serpulids in the Kalatar Formation grew on the oyster shell or other hard substrate, and they did not form reefs or bioherms. 展开更多
关键词 serpulids PALAEOECOLOGY Kalatar Formation PALEOGENE southwest Tarim Basin
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