مقاله انگلیسی رایگان در مورد بتنی دیرگداز مبتنی بر سیمان آلومینیوم باریم – زیرکونات باریم – الزویر 2005

 

مشخصات مقاله
ترجمه عنوان مقاله بتنی دیرگداز مبتنی بر سیمان آلومینیوم باریم – زیرکونات باریم برای صنایع فولادسازی
عنوان انگلیسی مقاله Refractory concrete based on barium aluminate–barium zirconate cements for steel-making industries
انتشار مقاله سال 2005
تعداد صفحات مقاله انگلیسی  7 صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله
مقاله پژوهشی (Research article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) scopus – master journals – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF)
3.057 در سال 2017
شاخص H_index 82 در سال 2018
شاخص SJR 0.784 در سال 2018
رشته های مرتبط  مهندسی عمران
گرایش های مرتبط  سازه
نوع ارائه مقاله
ژورنال
مجله / کنفرانس  Ceramics International
دانشگاه Ceramics Department, National Research Centre, Dokki, Cairo, Egypt
شناسه دیجیتال – doi
https://doi.org/10.1016/j.ceramint.2004.09.020
کد محصول E11743
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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فهرست مطالب مقاله:
Outline
Abstract
1. Introduction
2. Materials and experiment
3. Results and discussion
4. Conclusion
References

بخشی از متن مقاله:

Abstract

Five refractory cement mixes were prepared from different proportions of barite, zirconia and calcined alumina by sintering at 1500– 1550 8C for 3 h. The obtained cements were composed of barium aluminate and barium zirconate minerals in addition to comparable proportions of di-barium silicate. Cement mix prepared from 70 wt.% barite, 10 wt.% zirconia and 20 wt.% alumina and containing comparable proportions of barium aluminate and barium zirconate minerals (38 and 29 wt.%, respectively) shows a comporomise between good cementing, sintering and refractory properties. Refractory concretes prepared from 20 wt.% of this cement and 80 wt.% of either bauxite or fused spinel aggregate are composed mainly of mullite, barium aluminate, barium zirconate and a-corundum in case of bauxite aggregate or magnesium aluminate spinel in addition to barium aluminate and barium zirconate in case of fused spinel aggregate. These assemblages of minerals exhibit compact and homogenous microstructure and results in outstanding technological properties that meet the requirements of international standard specifications, i.e., good volume stability (permanent linear change is only 0.62 and 0.28%, respectively) good mechanical properties (680 and 610 kg/cm2 ), high spalling resistance (>30 cycles), high refractoriness (>1700 8C) as well as high load bearing capacity (ta: 1560 and 1590 8C). The combination of these advantages in such refractory concretes makes them suitable for use in severe conditions at high temperature applications especially in steel-making industries.

Introduction

The progress of high temperature industrial technology resulted in a substantial advances in monolithic refractories over the last decades. This has led not only to important innovations in castable preparation and application processes but also to significant improvement in product performance, in response to the constantly increasing service conditions imposed mainly by the steel and foundry industries [1,2]. The concretes based on alumina and magnesia are the most widely used high temperature materials. It has been reported that the refractoriness of refractory concretes can be increased substantially, without adversely affecting their compressive strength, when CaO in the cement clinker is partially substituted by MgO [3]. This is due to the formation of magnesium aluminate spinel which results in improved slag resistance and high hot sagging under load. Therefore, they are being used increasingly in steel-making applications such as lining of steel ladles, continuous casting tundishes and degasser snorkels and lancers [4,5]. However, their working temperatures are significantly lower and amount to 1800– 1900 8C [6]. Under the service conditions involving temperatures close to 2100 8C, barium aluminate–barium zirconate cement forms the promising materials.

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