陶瓷工业中对产自花岗岩的长石原料的提纯方法研究     

Mohamed El-Omla  Salah Shata 《地质与资源》2008,17(3):235-240

花岗岩是陶瓷工业中所需长石原料的重要来源之一.由于花岗岩中云母和氧化铁的存在,其最终产品的质量受到影响（强度、硬度、密度降低）.本研究对浙江花岗岩采用两阶段分离方法,以提高花岗岩中长石的质量.第一阶段为重力分离,去除重矿物杂质;第二阶段为磁性分离,进一步减少铁含量.用机械方法对不同加工阶段的3种样品进行了成分测试：1）原料花岗岩;2）第一阶段处理的花岗岩;3）第二阶段处理的花岗岩.结果显示,最终处理后的样品较之原始花岗岩在显微硬度、强度、密度及裂隙坚韧性方面都有明显提高.  相似文献   

Geochemical characteristics of particulate matter in the atmosphere surrounding a ceramic industrialized area   总被引：3，自引：0，他引：3  

E.?T.?Gómez  T.?Sanfeliu  M.?M.?JordánEmail author  J.?Rius  C.?de la?Fuente 《Environmental Geology》2004,45(4):536-543

Total suspended particulate samples (TSP) were collected and concentrations measured during seventeen months in the vicinity of a ceramic industrial area. A method of fractionating was applied to the samples in order to obtain two fractions corresponding to mineral particulate coming from dust emissions (Upper-F fraction) and to amorphous matter (carbon plus small amounts of S, Ca, Fe, etc) coming mainly from traffic and other combustion processes. Also for TSP samples several element concentrations were measured following two previous treatments: extraction of elements mainly associated with the soluble fraction of the samples (B, Fe, P, As, NO^2–, NH⁴⁺, Cl^–, F) and acid digestion for trace metals and elements mainly associated with the non-soluble fractions of the samples (Fe, As, Cd, Ni, Pb, Zn Ca). Seasonal differences and the influence of meteorological parameters (temperature, relative humidity, pressure and wind conditions) on the air pollution levels, particles as well as ions, were studied.Results show different seasonal and weekly evolution for mineral and amorphous carbonaceous particles because of the different origins in dust emissions or combustion processes respectively, and the different physical properties such as size grain. Of the ions analyzed Fe, Ca and Zn were clearly associated to mineral phases and consequently related to dust emissions, and NO^2–, NH4+, P, Cl^– were related to amorphous matter coming from combustion. Ni and Cd show lower levels than those reported as guideline values and the source is mainly related to the enrichment of these elements in clay materials. B and As content result in elevated concentrations, with the tendency to increase during cold months. The emission of these elements was associated with vaporization or volatilization during high temperature ceramic processes. The original gaseous state is influenced by temperature. In the winter the content for B and As is higher due to enhanced condensation of gas-phase boron onto particles, while in the summer the increase of air temperature results in elevated evaporation.  相似文献   

新型压电摩擦阻尼器的有限元分析及试验研究          下载免费PDF全文

朱军强  张泽鑫  张仁猛  李鹏飞 《地震工程学报》2015,37(2):377-382

利用压电陶瓷的压电效应,研发出一种基于半主动控制的新型压电摩擦阻尼器,介绍其构造和工作原理。建立新型压电摩擦阻尼器的ABAQUS有限元模型,得出阻尼器在不同工况下的滞回曲线,并进行其滞回性能试验,用试验值验证阻尼器有限元模型的相似性,两者得到的阻尼器摩擦力变化趋势相近;采用ANSYS建立安装有新型压电摩擦阻尼器的输变电塔模型,利用MATLAB计算输变电塔模型各层的加速度响应,验证新型压电摩擦阻尼器在实际结构中的摩擦耗能性能,为其工程应用提供理论依据。  相似文献   

利用非金属矿物原料研制半渗透陶瓷隔板     

范良明  向阳 《矿物岩石》1991,11(2):89-96

利用五种非金属矿物原料,按照科学的制造工艺,研制成功了高压半渗透隔板仪的核心部件——半渗透陶瓷隔板,广泛用于油气勘探和开发中测定流体分布和孔隙大小。其主要技术指标为:突破压力(过气)1—2兆帕(MPa),过水压力0.001—0.05兆帕,抗拉强度141kg/cm~2,抗压强度1310kg/cm~2,产品合格率达75％以上,其中达到国际先进水平的占32％。  相似文献   

晋江磁灶镇建筑陶瓷工业可持续发展初探     

翁发春 《地域研究与开发》1997,16(4):55-58

通过分析磁灶镇建筑陶瓷工业在迅猛发展中存在着环境污染，科技落后，产品结构不合理等一系列问题后，提出了污染型瞳可持续发展的新思路。  相似文献   

Possible uses of kaolin wastes and transformed materials from the Amazon region （northern Brazil） for environmental applications     

Romulo Simoes Angelica 《中国地球化学学报》2006,25(B08):25-25

The most important Brazilian kaolin district is located in the Amazon region. The beneficiation of this kaolin produces great volumes of wastes, mainly composed of coarse-grained kaolinite not suitable for the paper industry but still very fine and ideal for several other purposes. About 1000 M ton kaolinite-rich wastes are produced annually. The sludge is disposed on artificial sedimentary lakes that occupy extensive areas, with huge impacts on the environment due to extensive deforested areas needed for their construction. This work is indeed to present the different studies that have been carried out in order to characterize and find proper applications of such wastes and transformed products. Possible applications include： （1） production of high-reactivity metakaolinite and fine-grained silica for construction materials; （2） alumina for different applications （ceramic and adsorbents）. Methods used include： drying and calcination of the kaolin-residue, Al-extraction for low-granulometry alumina and silica （here named as sioclay） production. Start- and transformed materials were characterized by means of XRF, XRD, DTS-TG-DSC, FTIR, SEM-EDS, BET, among others. Technological assays were also carried out for ceramic purposes. The mineralogy is dominated by kaolinite, quartz and trace amounts of anatase, rutile, hematite and goethite. Total chemical analyses of all worked materials also reflect the theoretical composition of kaolinite. Both metakaolinite and sioclay do not exhibit X-ray diffraction patterns and present a very small grain size. Metakaolinite, alumina and sioclay exhibit increasingly values of specific area. For the ceramic products, sintering increases its mechanical resistance. Adsorption tests of different metals on kaolin-transformed products were carried out in a batch reactor. Tests will be presented for As, which is a toxic and carcinogenic metalloid. Results for As （V） adsorption carried out in this investigation reveal the ability of sioclay〉alumina〉metakaolin to remove this element by sorption from the solution.  相似文献   

深海视频采集系统保护窗口的设计和优化          下载免费PDF全文

马俊林  杜杰  刘英 《海洋开发与管理》2019,36(2):60-64

保护窗口是深海视频采集系统的关键组件。为提高深海视频采集系统的整体性能,保障深海资源的勘探和开发利用,文章通过力学分析、理论对比和打压试验等过程,对保护窗口进行设计和优化。研究结果表明:球扇形窗口更适合全海深均匀高压环境;与主流窗口材料蓝宝石相比,我国自主研制的YAG透明陶瓷在性能和成本上具有优势;以第四强度理论作为充分准则进行设计,以第一和第二强度理论作为必要条件进行校验,结合有限元力学分析结果,外径为96mm的半球形保护窗口的最优内径为76mm;对采用该内径尺寸透明陶瓷保护窗口的深海视频采集系统进行全海深压强水下打压试验,有力证实相关理论和设计思想的合理性和可靠性。  相似文献   

一种RZB分量式钻孔应变仪原地线性标定技术及试验     

吴立恒  熊玉珍  李涛  陈征 《大地测量与地球动力学》2018,38(4):437-440

由于运维时间长,RZB钻孔应变仪存在元器件老化、材质蠕变等问题,使传感器性能不断发生变化,需要定期对其进行原地静态物理标定。目前采用的以压电陶瓷为核心的静态物理标定方式存在迟滞、蠕变、非线性等缺陷,使标定结果精度差、误差大。本文设计了以陶瓷马达为核心、光栅传感器作为反馈、RS485总线为基础的远程线性标定机构,实现了RZB钻孔应变仪原地线性标定功能。在实验室开展原地线性标定模拟试验,传感器满量程的标定数据结果表明,标定分辨率达到2 μm,线性度优于1%。  相似文献   

矿物微粉制备的硅酸铝质高强陶瓷   总被引：1，自引：0，他引：1  

李博文 《地学前缘》2000,7(2):535-539

介绍了一种以蓝晶石微粉和αAl2 O3 微粉为主要原料 ,一步煅烧法制备硅酸铝质高强陶瓷的工艺方法 ,并对制品的烧结性能、显微结构进行了分析。 (1)由该方法制得的硅酸铝质陶瓷 ,体积密度为 2 0 9～ 2 12 g/cm3 ,气孔率为 2 5 58%～ 2 8 54% ,常温耐压强度高达 180 87～ 315 30MPa ,在烧结过程中体积收缩率为 0 4 9%～ 2 73%。与传统烧结方法生产的同类产品相比 ,工艺流程简化 ,烧结温度降低 2 0 0～ 2 50℃以上 ,材料的耐压强度仍得到较大幅度的提高 ,是一种值得向生产领域推广应用的方法。 (2 )制品强度的提高 ,主要得益于纤维状莫来石的交错排列。 (3)陶瓷的烧结温度以 1350℃为宜。  相似文献   

Purification of diatomite powder by acid leaching for use in fabrication of porous ceramics   总被引：1，自引：0，他引：1  

Osman an  Remzi Gren  Cem zgür 《International Journal of Mineral Processing》2009,93(1):6-10

This study presents an investigation of the purification of a raw diatomite by acid leaching conducted in hot solution (75 °C and 5 M HCl) for long periods up to 240 h, evaluates the use of these purified powders in the fabrication of porous materials, and examines their porosities. The treatment for 1 h increased the specific surface area of diatomite from 189 m²/g to 222 m²/g, but the SiO₂ content of 78.66% was still low. Material leached for a relatively short time shows an amorphous phase with quartz and plagioclase phases and the plagioclase is removable at longer leaching times during which no disruptive effect on the fine microscopic pores of the particles was observed. Thus, the diatomite based powders have potential use in the fabrication of porous coating as a membrane-separating layer: sintering at a relatively high temperature (1300 °C) still showed a significantly high apparent porosity of 48%.  相似文献