The Best of Both Worlds:Supply and Demand China''''s Role as a Source of Refractory Minerals for Global Markets

China has long been recognised as an importantsource of refractory raw materials for refractorymarkets worldwide. Bauxite, magnesia, fused a-lumina, and refractory clays in particular, havemaintained China' s strong position as the world'sleading supplier of these mineral. However, im-portant changes have taken place in the structure of     

河南省大量营养元素平衡状况

河南省耕地氮、磷、钾化肥投入构成及其演变表明：氮肥所占比例在减少,而磷、钾肥所占比例逐步提高,但仍未达到合理的配比。磷、钾肥仍然不足。根据多年田间试验结果及施肥和农作物产量与携营养物质的统计分析,计算了河南省大量营养元素的平衡状况     

河南省肥料钾养分资源状况浅析

通过统计分析与典型调查相结合,对河南省农田肥料钾资源投入数量和结构的演变状况进行了研究。结果表明,１９７８年以前没有使用化学钾肥,到１９９６年施化学钾肥已占到施钾总量的３６．４％,但仅占化肥施入总量（Ｎ＋Ｐ２Ｏ５＋Ｋ２Ｏ）的７．６％,ｍ（Ｎ）ｍ（Ｐ２Ｏ５）ｍ（Ｋ２Ｏ）为１０．４３０．１２。有机肥中钾资源丰富,但归还率不高,仅为３７．５％,因此,挖掘有机肥中钾素可利用的潜力很大。     

河南省煤炭工业可持续发展问题探讨

分析了影响河南省煤炭工业可持续发展的主要因素 ,介绍了“十五”期间河南省煤炭综合利用的发展方向 ,指出大力发展煤炭的综合利用是促进河南省煤炭工业可持续发展的必然选择。     

Development and Markets of China‘s Refractory Raw Materials

The distribution of refractory raw material resources,its throughput capacity, product varieties and quality as well as market situation in China were investigated.     

河南省磷肥工业的现状与发展

通过对河南省磷肥企业生产许可证的考核和行业管理资料的整理,较全面介绍了河南省磷肥企业产品的结构、生产装备、技术、产量及消耗等状况,并对行业目前存在的主要问题和今后的发展提出一些建议。     

Progress on Preparation of Refractory Powder Using Nonmetallic Minerals and Its Applications

This review summarized the recent advances in the utilization of nonmetallic minerals and their applications for fabrication of unfired refractories.The preparation of refractory powder utilizing cheap nonmetallic minerals of zircon,low-grade bauxite and quartz was discussed,respectively.The preparation of three unfired SiC-based refractories：SiC-SiAlON-ZrN,Al2O3-SiC/β-SiAlON/Ti（C,N）-C,and Al2O3-SiC-Si3N4 using the as-prepared refractory powders was introduced.     

贵州毕节永安碗厂粘土的理化及工艺性能研究

从矿山采集具有代表性的粘土,球磨并过80目筛备用.利用X射线荧光光谱仪(XRF)、X射线衍射仪(XRD)、综合热分析仪(DTA-TG)、场发射扫描电子显微镜(FE-SEM)和透射电子显微镜(TEM)对粘土的化学成份、矿物组成、理化性质和微观形貌进行了表征,并详细考察了其多项工艺性能指标.研究结果表明:该粘士的主要矿物组成为伊利石(9.49 wt％)、累托石(45.36 wt％)和石英(43.68 wt％),呈典型的片状结构.该矿物原料可塑性良好、阳离子交换容量低、流动性较小、触变性较大、干燥收缩较大、干燥强度较低.由于该粘土矿物中碱金属和碱土金属总含量不高(4.25 wt％),因此烧结温度较高(烧结温度范围为1250～ 1300℃).该粘土矿物中Fe2 O3(0.72 wt％)和TiO2(0.27 wt％)总体含量不高,因此具有较高的烧成白度,1250℃下烧成的白度值为50.59％.     

对河南化肥工业调整和振兴的认识和思考

结合正在编制的《河南省化工行业产业振兴规划》，分析了河南省化肥工业的现状和矛盾，提出了河南省化肥工业的发展思路。     

Cyanidation of Gold Associated with Silver Minerals in Sulfide Mineral Matrices

Lead salt stimulated the dissolution of gold when gold associated with silver minerals was interspersed in the silica or in the pyrite‐silica layer. Gold dissolution was likewise promoted through lead addition for chalcopyrite‐silica and the sphalerite‐silica systems. Lead addition did not boost gold dissolution and a recovery of 6.9 % was achieved for gold and silver minerals dispersed in stibnite. Lead pretreatment also enhanced gold recovery except for the stibnite‐silica system. Gold surface‐passivating films were observed for gold associated with silver minerals and stibnite.     

Minerals in some Australian oil shales

The mineral composition of oil shales from three widely different ateas within Australia has been examined by X-ray diffractometry after low-temperature ashing. Quartz is more abundant than calcite. Feldspar is prominent in the Permian oil-rich shale from Glen Davis, New South Wales. Clay minerals are represented by smectite, illite, kaolinite and mixed-layer minerals (mostly mica-smectite). The content of clay minerals is generally low, except in the Tertiary oil shale from Rundle, Queensland.     

Advances in Process Control for Refractory Production

1IntroductionSince the middle of the 1990s, the focus of refrac-tory research in China changes slowly from filling upthe domestic blank to deeply researching manufactureprocess, up-grading equipments and control methods,improving and stabilizing products quality[1].The National Center of Supervision for Refracto-ries for Building Materials Industry is one of the witnes-ses of Chinese refractory history. Since 1990, the cen-ter has tested many refractories both homemade andimported. Recentl…     

高档耐火纤维的制备与应用

本文综述了我国耐火纤维，尤其是高档耐火纤维的生产与应用情况。重点讨论了氧化锆耐火纤维的制备与应用。     

分形及其在耐火材料研究中的应用

介绍了分形几何学的基本概念及随机分形维数的测定方法。并以O'－Sialon-ZrO2为例，讨论了并在耐火材料研究中的应用。     

非热等离子体技术在难降解废水处理中的应用进展

以有机废水和垃圾渗滤液处理为例,讨论了非热等离子体在难降解废水处理中的应用进展.     

耐火材料等静压成形缺陷分析与预防措施

详细介绍了数值模拟技术在耐火材料等静压成形分析中的应用,分析并讨论了耐火材料在等静压成形过程中的各种缺陷产生的原因及其防止办法.关键词耐火材料等静压缺陷 详细介绍了数值模拟技术在耐火材料等静压成形分析中的应用,分析并讨论了耐火材料在等静压成形过程中的各种缺陷产生的原因及其防止办法     

耐火材料等静压戊形缺陷分析与预防措施

详细介绍了数值模拟技术在耐火材料等静压成形分析中的应用,分析并讨论了耐火材料在等静压成形过程中的各种缺陷产生的原因及其防止办法。     

碳酸盐矿石中钨的前处理方法研究

对碳酸盐矿石中钨的熔矿方法进行了研究,分别考察了坩埚、熔剂、双氧水等因素的影响,通过电感耦合等离子体发射光谱法和传统比色法对钨含量的测定结果比较,得出以镍坩埚、氢氧化钠对碳酸盐矿石进行熔矿前处理,钨能较多的存在于溶液中以利于含量的测定。     

人体必需矿物质与营养强化剂

必需矿物质是维持人体正常生理功能所必需的,但我国居民普遍缺乏铁、钙等必需矿物质。食品营养强化是纠正营养缺乏和改善居民健康的重要手段,但我国居民对矿物质营养强化剂的认识仍有很多误区。从人体必需矿物质的生理功能出发,介绍了目前我国常用的矿物质营养强化剂和载体,指出了食用矿物质强化食品的注意事项。