Modeling of the classification behavior of the diaphragms used in multi-chamber cement mills     

C.E. Özer  S¸.L. ErgünA.H. Benzer 《International Journal of Mineral Processing》2006

A new approach has been developed for describing the classification that arises at the diaphragm in multi-chamber ball mills. Fourteen industrial scale cement mills have been sampled in this study and after mass balancing, model fits of the equipment were done. Successive mill product predictions for the sampled conditions were achieved, and requirements to build up an optimization capable model are discussed.  相似文献   

水源井同径套、筛管封井止水工艺     

邢振德 《中国煤田地质》2007,19(A01):83-84

水源供水井，在封井止水下艺中，始终存在封井质量、水泥固结质量及井内钻具事故等风险，为此在对准格尔旗施工的10口水源供水井施工中，制作了单向逆止阀水泥封隔器，并与Ф340套、筛管用吊卡按一定顺序下入井内。该装置的使用，有效地提高了封井止水的质量。  相似文献   

氢氧化镁沉淀热力学、动力学及控制   总被引：5，自引：0，他引：5       下载免费PDF全文

许荣辉  李海民 《盐湖研究》2003,11(3):40-42,46

分析了氢氧化镁絮状沉淀生成的热力学、动力学 ,提出了使其结晶的控制措施  相似文献   

Atomistic simulation of Mg2SiO4 and Mg2GeO4 spinels: a new model     

M. Blanchard  K. Wright  J. D. Gale 《Physics and Chemistry of Minerals》2005,32(5-6):332-338

  相似文献   

桩底注浆钻孔灌注桩承载力的研究     

李连营  林波  邵建 《岩土工程技术》2005,19(1):24-27

通过天津地区几例钻孔灌注桩桩底注浆的静载荷试桩结果 ,分析天津地区钻孔灌注桩桩底注浆单桩竖向极限承载力标准值的估算方法  相似文献   

MgSO4-NaOH-H2O四元交互体系在200℃水热条件下相互作用的动力学研究          下载免费PDF全文

王雪静  周建国  高世扬  夏树屏  卢雁 《盐湖研究》2004,12(2):29-32

利用七水硫酸镁和氢氧化镁,研究了在200℃水热条件下合成产物的物相及其随时间的变化机制。  相似文献   

水泥搅拌桩与锚杆组合支护结构的力学参数研究   总被引：1，自引：0，他引：1  

赵剑豪  陈振建  方家强 《岩土力学》2004,25(Z2):265-270

水泥搅拌桩--锚杆组合支护结构是一种新型的组合支护结构,笔者采用有限元方法进行各相关力学参数研究,分析了该组合支护结构的受力特性及变形性态.通过计算结果与实测数据的比较,表明本文所得结论对该组合支护结构的应用有一定的指导价值.  相似文献   

Mineralogical changes during thermal demagnetization of natural continental sandstones     

C. Prezzi  R. Somoza  R. C. Mercader 《Studia Geophysica et Geodaetica》2005,49(2):213-232

We study the mineralogical changes suffered by specimens of natural miocene red and green continental sandstones (from Pozuelos Formation and Tiomayo Formation) cropping out in the Argentine Puna that increase their bulk magnetic susceptibility and change color when thermally treated. We hypothesize that on heating siderite, which is present in small quantities as cement in the studied sandstones, would oxidize and decompose into maghemite and/or magnetite. Subsequent heating to higher temperatures sometimes would bring about the conversion of maghemite and/or magnetite to hematite. Mössbauer spectroscopy proved to be a very valuable tool for the determination of the presence of siderite in small amounts in the studied samples. The present results show that further work is needed in order to fully understand the mineralogical changes suffered by continental sandstones during heating. The characterization of such changes occurred during laboratory routines is relevant, since they can help to better understand natural processes.  相似文献   

Soil water residence times and solute uptake on a dolomite bedrock—preliminary results     

Stephen T. Trudgill  Ian M. S. Laidlaw  Peter L. Smart 《地球表面变化过程与地形》1980,5(1):91-100

Calcium and magnesium levels have been monitored in slope foot drainage waters on a dolomite bedrock. Both calcium and magnesium rich pulses occur. Short term dissolution experiments demonstrate high calcium levels in solution while other authors have suggested that long residence time groundwater has relatively high levels of magnesium due to calcite precipitation. Patterns of field fluctuations in Ca: Mg ratios can thus be tentatively interpreted in terms of short residence time water of high calcium content mixing with long residence time water of high magnesium content. Fluorometric dye tracing has been used to indicate the orders of magnitude of soil water residence times, suggesting that quickflow components are resident in the system for a few hours to a few days. Further work is in progress.  相似文献   

基坑支护结构施工技术要点与工程实例分析(下)   总被引：1，自引：0，他引：1       下载免费PDF全文

刘小敏 《探矿工程》1998,(5):4-6

４地下连续墙施工技术方法４．１要点（１）导墙的修筑精度（宽度、平直度、垂直度和标高等）和强度对成槽施工质量有直接影响,高质量的导墙是高质量槽段的基础,常用的导墙形式如图２所示。图２导墙断面形式示意图（ａ）板型;（ｂ）Ｌ型;（ｃ）倒Ｌ型;（ｄ）槽型导墙...  相似文献