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连铸结晶器石英水口蚀损机理分析 被引量:3
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作者 刘明华 董小明 +2 位作者 唐成伟 宋传文 张晓秋 《中国冶金》 CAS 北大核心 2019年第5期66-69,共4页
在前人研究的基础上,总结了石英水口制备工艺、选用以及在钢水浇铸过程的作用。针对本厂下线石英水口的状况,通过测量下线水口断面尺寸,分析了钢水成分、保护渣和水口对中等因素对石英水口蚀损的影响,得知石英水口蚀损主要有内部扩颈和... 在前人研究的基础上,总结了石英水口制备工艺、选用以及在钢水浇铸过程的作用。针对本厂下线石英水口的状况,通过测量下线水口断面尺寸,分析了钢水成分、保护渣和水口对中等因素对石英水口蚀损的影响,得知石英水口蚀损主要有内部扩颈和外部缩颈两种形式,其中以保护渣侵蚀造成缩颈为主,平均速率为15.86mm/h。水口在使用过程中如果未良好对中,会造成水口薄厚不均,影响水口正常使用。针对上述问题提出了在保证水口对中的前提下,改变石英水口浸入金属液面深度来延长其使用寿命的方法。 展开更多
关键词 结晶器 石英水口 蚀损机理 缩颈 寿命
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Gastro-protecting effect of gefarnate on chronic erosive gastritis with dyspeptic symptoms 被引量:20
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作者 Du Yi-qi SU Tun +9 位作者 HAO Jian-yu WANG Bang-mao CHEN Min-hu LI You-ruing tang cheng-wei GONG Yan-fang MAN Xiao-hua GAO Li CAI Quan-cai LI Zhao-shen 《Chinese Medical Journal》 SCIE CAS CSCD 2012年第16期2878-2884,共7页
Background The role of gastro-protecting agents on symptomatic chronic gastritis is unclear. This multicenter, open, randomized trial was designed to compare the comprehensive effects of gefarnate with sucralfate on e... Background The role of gastro-protecting agents on symptomatic chronic gastritis is unclear. This multicenter, open, randomized trial was designed to compare the comprehensive effects of gefarnate with sucralfate on erosive gastritis with dyspeptic symptoms. Methods Totally 253 dyspepsia patients confirmed with erosive gastritis were enrolled from six centers in China. They randomly received either daily 300 mg gefarnate or 3 g sucralfate for six weeks. The primary endpoint was the effective rate of both treatments on endoscopic erosion at week six. Results Gefarnate showed an effective rate of 72% and 67% on endoscopic score and dyspeptic symptom release, which is statistically higher than sucralfate (40.1% and 39.3%, P 〈0.001, intension-to-treat). For histological improvement, gefarnate showed both effective in decreasing mucosal chronic inflammation (57.7% vs. 24.8%, P 〈0.001, intension-to-treat) and active inflammation (36.4% vs. 23.1%, P 〈0.05, intension-to-treat) than the control. A significant increase of prostaglandins and decrease of myeloperoxidase in mucosa were observed in gefarnate group. Severity of erosion is non-relevant to symptoms but Helicobacter pylori (H. pylor status does affect the outcome of therapy. Conclusions Gefarnate demonstrates an effective outcome on the mucosal inflammation in patients with chronic erosive qastritis. Endoscopic and inflammation score should be the major indexes used in gastritis-related trials. 展开更多
关键词 GEFARNATE gastritis functional dyspepsia gastro-protection
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