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微晶玻璃是一类含有微晶相和玻璃相的多晶固体材料,是特定组分的基础玻璃在一定的热处理制度下通过控制晶化作用制得的一种功能性材料,兼具玻璃的基本特性和陶瓷的多晶特性,因此具有良好的化学稳定性和物理稳定性,目前已被广泛应用于建筑装饰、电子电工和机械化工等领域。利用废弃高炉渣生产微晶玻璃不但可以固定炉渣中的有害成分,还可以降低成本,产生一定的经济效益,因此这是一项具有环保和经济双重效益的生产技术。文章主要概括了以高炉渣作为原材料制备微晶玻璃的发展历程,系统阐述了国内外对于晶核剂的作用机理、提高微晶玻璃的性能、主晶相的选择以及晶化方式等方面的研究进展,并介绍了高炉渣微晶玻璃的制备原理、工艺方法、晶核剂和热处理制度的选择依据,同时简要叙述了微晶玻璃按照不同标准的分类情况及其性质和应用。 相似文献
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以煤矸石为主要原料,CaO为助熔剂,采用直接烧结法制备微晶玻璃。探讨了热处理制度对微晶玻璃物相组成、吸水率、体积密度、线收缩率等物化性能的影响。结果表明:本试验所用煤矸石主要含SiO2 40%~50%、Al2O3 25%~40%、Fe2O3 5%~10%,在1 280℃下焙烧60 min,所制备的微晶玻璃主晶相为莫来石。同时,其体积密度和线收缩率最大,分别达2.155 g/cm3和17.911%,吸水率为0.302%。该工艺为煤矸石的资源化利用提供了一种途径。 相似文献
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摘 要 为推动大宗废弃物和新型废弃物的综合利用,开发热态炉渣余热高效回收和资源化利用技术,以某含钛高炉渣及矿山铁尾矿为原料,利用高炉渣排渣时的高温熔融改性制备微晶铸石,系统研究了不同原料
配比对微晶铸石性能的影响。结果表明:当含钛高炉渣配比为41.7%,铁尾矿配比为58.3%,可得主要晶相为透辉石、辉石,且其耐酸度、耐碱度、抗折强度等性能均达到相应国家标准的微晶铸石产品。通过利用高炉
渣排矿时的余热,将含钛高炉渣与铁尾矿制备微晶铸石产品,为矿山铁尾矿与高炉钛渣的综合利用提供了新思路。 相似文献
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《中国稀土信息(英文版)》2014,(11)
正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent 相似文献
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《中国稀土信息(英文版)》2014,(8)
正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of 相似文献
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《中国稀土信息(英文版)》2014,(7)
正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst, 相似文献
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Ye Peipei 《中国稀土信息(英文版)》2014,(7)
<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new 相似文献
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针对煤矿开采深度不断向深部延伸,掘进巷道受深部高应力的影响越来越大,巷道围岩整体稳定性差,矿山压力显现越剧烈现象,一般锚网喷加锚索支护无法从根本上控制巷道的变形。总结了平煤股份十三矿-685 m进风大巷注浆加固技术,依据对巷道掘进之后变形监测数据的采集,对巷道变形机理进行分析研究,并对注浆时段进行了合理选择,在对巷道的注浆工艺进行了充分论证的基础上,对巷道进行了注浆。注浆后效果表明:巷道滞后注浆时间段的选择非常重要,巷道在恰当的时间内进行注浆加固施工,能有效控制巷道的变形,巷道注浆后变形量明显减小,岩体的稳定性明显增强,减少了巷道日常维修工作,降低了矿井的生产成本,保障了矿井的安全生产。 相似文献
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《中国稀土信息(英文版)》2014,(9)
正China Minmetals Rare Earth Construction of Jianghua Separation Plant is set to complete at the yearend Civil works of Jianghua Separation Plant have been finished and the company is installing and debugging equipments now.It is estimated that construction of Jianghua Separation Plant will be 相似文献
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《中国稀土信息(英文版)》2014,(11)
正Total transactions of rare earth in Rare Earth Ex-change Center of Hunan South Rare and Precious Metal Exchange neared 40 billion yuan from January to October From the opening in January of this year to the end of October,the total transaction of rare earth products in Rare Earth Exchange Center of Hunan South Rare and Precious Metal Exchange neared40 billion yuan.There are 16 varieties including dysprosium oxide and terbium oxide traded on the exchange center,one of the largest trading platforms for rare earth oxides in China. 相似文献
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A hypothesis that associates optimal conditions of mineral flotation with a zero charge of their surface is put forward. This
hypothesis serves as a basis for a methodology to obtain and verify quantitative physical-chemical models for a minimal necessary
concentration of a collector during flotation of sulfide-free minerals. These models may be of use for upgrading engineering
processes of flotation and as a job for the concentration plant automation systems.
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Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 89–99, March–April, 2006. 相似文献
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随着地下采煤活动不断加大,越来越多的输电杆塔不可避免地被建设在煤矿沉陷区。目前,现有手段采用靠人力去进行定期检查一定会浪费大量的人力和物力,因而需开展对位于煤矿沉陷区的杆塔进行实时在线检测。基于NB-IoT和LoRa提出了一种新的算法——低功耗广域网(LPWAN)技术,提出了一种新型的输电杆塔倾斜监测系统,其中包含1个主节点和多个子节点,以适应地域广和远距离的需求信息监控。该系统通过LoRa多节点网络的数据传输,将杆塔的倾斜参数通过NB-IoT上传至在线实时监控系统。管理人员可以从后台得出监测数据并分析结果,及时对处于煤矿沉陷区的有故障的输电杆塔进行针对性的维护。 相似文献
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介绍了如何利用其他软件在AutoCAD中精确绘制各种不同规划曲线的技巧 ,很好地解决了在AutoCAD中绘制多义线方法形成复杂曲线的误差问题 ,取得了较好的效果 ,具有实际意义。 相似文献