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一、我国新型干法水泥的规模迅速扩大 我国新型干法水泥起步于20世纪70年代,至今已30多年,但发展步伐较小,速度缓慢。其中,20世纪70年代,主要进行实验研究、中间试验和生产实验;80年代,从国外成套引进的冀东、宁国、珠江、柳州等4000t/d、3000t/d熟料级生产线及国产化的江西水泥厂2000 t/d熟料生产线相继投产,同时引 相似文献
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1概况天瑞集团汝州水泥有限公司5000t/d新型干法水泥熟料生产线,是规划两条线中的第二条生产线,年产熟料160万吨,包括从原料进厂破碎至水泥熟料出厂的一条完整的5000t/d水泥熟料生产线。工程总投资2.85亿元,从生料均化库桩基开始到生产线一次点火投产仅用了10个月另2天。无论从 相似文献
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北京太行前景水泥有限公司3000t/d熟料生产线为天津水泥工业设计研究院开发设计的五级双系列带TSD分解炉的新型干法生产线。该生产线窑系统于2003年1月20日点火,1月26日投料,至今已投产近两年,2003年生产水泥熟料82.38万t,2004年共计生产水泥熟料近百万吨。 相似文献
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内蒙古乌兰水泥集团现拥有三条2500t/d干法熟料生产线,第四条5000t/d干法熟料生产线正在安装、调试阶段,随着第四条生产线的投产,原料石灰石的贮量成了大问题,为此,我公司研究用电石渣代替部分石灰石,并寻求新的配料方案。 相似文献
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0 概述 北京新港水泥制造有限公司系中外合资企业,是天津水泥设计研究院设计的700t/d水泥熟料干法生产线,设计年产熟料21万t,年产水泥30万t。1995年11月投产以来,公司注重管理和技术创新,不断投入对生产线进行技术改造,熟料已达1200t/d(月考 相似文献
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1公司简介平凉祁连山水泥有限公司系甘肃祁连山水泥集团股份有限公司控股子公司,公司位于甘肃省平凉市崆峒区40里铺镇洪岳村,公司一期项目2500t/d新型干法水泥熟料生产线(含矿山)总投资3亿元,2004年12月28日投产,有效工期10个月。生产线采用环保节能的工艺设 相似文献
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为掌握佛山市顺德新城区降水中污染物的情况,2015年7月至8月,文章作者分别在雨天进行了降水取样,对降水中的pH、电导率、常见阴离子(F-、Cl~-、NO_3~(2-)、SO_4~(2-))及部分重金属(铅和镉)进行监测分析。选择有相关数据的珠江三角洲和石家庄、厦门等地的降水中污染物的情况进行对比。结果表明,顺德新城区降水中的p H和部分阴离子浓度优于珠江三角洲平均值,酸雨类型属于硫酸和硝酸混合型;其水体洁净程度略差于石家庄;铅和镉的浓度也高于厦门,甚至部分超出了人体能直接接触的安全范围。 相似文献
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Saturated very long chain fatty acids (fatty acids with greater than 22 carbon atoms; VLCFA) accumulate in peroxisomal disorders,
but there is little information on their turnover in patients. To determine the suitability of using stable isotope-labeled
VLCFA in patients with these disorders, the metabolism of 22-methyl[23,23,23-2H3]tricosanoic (iso-lignoceric) acid was studied in rats in vivo and in human skin fibroblasts in culture. The deuterated iso-VLCFA was degraded to the corresponding 16- and 18-carbon iso-fatty acids by rats in vivo and by normal human skin fibroblasts in culture, but there was little or no degradation in peroxisome-deficient (Zellweger’s
syndrome) fibroblasts, indicating that its oxidation was peroxisomal. Neither the 14-, 20-, and 22-carbon iso-fatty acids nor the corresponding odd-chain metabolites could be detected. In the rat, the organ containing most of the iso-lignoceric acid, and its breakdown products, was the liver, whereas negligible amounts were detected in the brain, suggesting
that little of the fatty acid crossed the blood-brain barrier. Our data indicate that VLCFA labeled with deuterium at the
ω-position of the carbon chain are suitable derivatives for the in vivo investigation of patients with defects in peroxisomal β-oxidation because they are metabolized by the same pathways as the
corresponding n-VLCFA. Moreover, as iso-VLCFA and their β-oxidation products are readily separated from the corresponding n-fatty acids by normal chromatographic procedures, the turnover of VLCFA can be more precisely measured.
A preliminary report of part of this work (Reference 18) was presented at the 5th International Symposium on the Synthesis
and Applications of Isotopes and Isotopically Labelled Compounds, Strasbourg, France, June 20–24, 1994. 相似文献
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高效液相色谱法分析化妆品中微量成分的研究进展 总被引:1,自引:0,他引:1
综述了高效液相色谱法在化妆品中防腐剂、防晒剂中紫外线吸收剂以及性激素的检测等几个方面的应用;同时,介绍了分析所用的色谱柱、流动相、使用的检测手段以及样品的提取方法;最后针对目前存在的问题,提出了高效液相色谱用于化妆品中微量成分分析的研究方向和发展前景。 相似文献
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H. Toda Y. Mochizuki T. Kawanishi H. Kawashima 《Nutrient Cycling in Agroecosystems》2002,63(2-3):167-173
In a coastal agricultural area in the central part of Japan (Shizuoka), we found decreasing nitrate concentration with depth in a shallow groundwater, where the depth to water table varied between 0.6 and 1.2 m below ground surface. High nitrate concentrations (5–29 mg N L–1) were often observed in the upper layer (0–2 m) of the groundwater, but the concentration decreased to less than 1 mg N L–1 in the deeper layer. Ammonium was scarcely detected, and the concentration of dissolved oxygen was usually low (< 1 mgO2 L–1) in the groundwater. Nitrate in the groundwater often had very heavy nitrogen stable isotope ratios (>20{}). There was a negative relationship between nitrogen stable isotope ratio of nitrate and its concentration. When nitrate was injected into the groundwater with acetylene and bromide (a conservative tracer), nitrate concentration decreased to 20% of the initial level within 5 days, accompanied by the increase in nitrite and nitrous oxide concentration and a little change in bromide concentration. These results indicate that microbial denitrification plays a potential role in the decrease of nitrate in shallow groundwater at the study site. 相似文献
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我国硝酸工业生产技术新进展 总被引:1,自引:0,他引:1
系统叙述了我国硝酸工业2000-2007年生产现状及主要技术成果,尤其指出了国产"四合一"机组的成功投运,使我国硝酸国产化装置取得较大的进步,表现在吨酸的铂耗、氨耗和能耗等方面接近国外引进装置水平,同时介绍了国外双加压法硝酸生产技术的进展.我国已成为硝酸生产大国,仍需以先进的技术改造和发展我国硝酸工业,确保我国硝酸工业健康有序地发展,加快从硝酸生产大国向强国迈进的步伐. 相似文献