To summarize, a further intensification of the carbonizing process and a higher coke quality can be achieved by raising the quality of silica brick in the indicated directions, establishing the highest safe temperatures from the viewpoint of silica reduction and rationally reducing the heating-wall thickness.

Silica brick for modern coke-oven batteries

Temperature dependence of Young’s modulus, damping and dilatation during repeated thermal cycling of silica refractories for high-temperature thermal energy storage (TES)

This entry concerned with dense silica bricks microstructure was produced as a part of a project within the Technology Agency of the Czech Republic which is being implemented in cooperation of the biggest producer of refractories the P-D Refractories CZ company with the research organisation Brno University of Technology. The paper is focused on the influence of mixture homogenisation and the influence of grain size of the mineraliser on the resulting utility properties of the material as well as its microstructure. It has a decisive influence on the durability of the material in a building structure. This paper is a continuation of a previously published study dealing with the suitability of various types of mineralising agents in terms of density, strength and mineral composition of silica brick. The entry describes the influence of the method of mixture homogenisation and the influence of granulometry of the applied Femineralising agent on the resulting silica microstructure. Porosity, density, phase composition and microstructure of the experimentally prepared silica bricks samples were examined and the results were discussed in context with the technology of homogenisation and firing temperature used. The properties of silica bricks samples were compared to the sample without any Fe-mineraliser. Keywords—Silica bricks, Fe-mineraliser, mineralogical composition, new developed silica bricks. I. GENERAL INTRODUCTION ILICA brick is a refractory which is significant from the chemical point of view by its high content of SiO2 (more than 93 %). As a mineral, it is composed of various modifications of SiO2, particularly β-cristobalite and γtridymite [1]. Furthermore, it is composed of a low amount of unmodified β-quartz, calcium orthosilicates, and vitreous phase [2]. The usage of refractory materials, usage of silica bricks as well, is influenced by technological development in the industries where these materials are applied. Their constantly increasing technical quality is an accompanying effect referred to as “Hara-kiri effect.” Despite the unavoidable trend of continuous stagnation of the volumes required by industries, new refractory products are being developed, new technologies invented or new raw materials utilized. One of Dr.Lenka Nevrivova is with the Institute of Technology of Building Materials and Components, Brno University of Technology, Faculty of Civil Engineering, Brno, Czech Republic (corresponding author provide phone: +420 605 544 863; fax: +420 541 147 502; e-mail: nevrivova.l@ fce.vutbr.cz). Ing. Karel Lang, CSc., and Ing. Miroslav Kotoucek are with the P-D Refractories CZ a. s., Velke Opatovice, Nadrazni 218, Czech Republic (email: lang@mslz.cz, kotoucek@mslz.cz). Mgr. Dalibor Vsiansky is with the Ph.D. Department of Geological Sciences, Masaryk University, Brno, Czech Republic (e-mail: dalibor@sci.muni.cz). such products is silica material which is still used for its specific properties. The use of silica material is quite specific, being implemented mainly in the following 3 areas with completely different utilization (Fig. 1). The biggest volumes are utilized in the construction of coke oven batteries, silica is still hardly replaceable in the crowns of glass melting furnaces and it is being used ever more frequently and also for the top parts of hot blast stoves in metallurgy. Even though the application of silica materials in these 3 areas is very effective there is still a potential for reaching an even higher level of quality. The success of this material based on SiO2 is determined mainly by its outstanding performance at high temperatures. The melting point of SiO2 is the lowest one in the category of technical oxides (1726C) which is why firing is the critical part of the manufacturing process. Fig. 1 Application of silica in coke production, glass industry and metallurgy Despite this fact it is clear that the desired changes of parameters cannot be attained only by making changes in the firing regime. It is essential to attain maximum density at raw conditions and optimal dosage of mineralisers (maintaining thermodynamic properties) in order to have the optimal solution. Among other issues related to the use of silica bricks are adapting the material’s behaviour to various operational conditions and optimizing its properties for the requirements of specific applications. Reaching better chemical (higher SiO2 content and lower content of melting oxides), physical (lower apparent porosity and higher CCS) and thermodynamic properties (lower speed of creep) is mostly linked with higher thermal conductivity which is not always an advantage especially in glass industry application. A partial problem is also posed by the specification of “Alkali-resistance test (as per OWENS-ILLINOIS)” where corrosion resistance test at 1370°C is required. This temperature will not always correspond with operation temperatures which are mostly higher. There will be a The Influence of Mineraliser Granulometry on Dense Silica Brick Microstructure L. Nevrivova, K. Lang, M. Kotoucek, D. Vsiansky S World Academy of Science, Engineering and Technology International Journal of Civil and Environmental Engineering Vol:8, No:11, 2014 1125 International Scholarly and Scientific Research & Innovation 8(11) 2014 ISNI:0000000091950263 O pe n Sc ie nc e In de x, C iv il an d E nv ir on m en ta l E ng in ee ri ng V ol :8 , N o: 11 , 2 01 4 pu bl ic at io ns .w as et .o rg /9 99 96 65 /p df difference in the obtained values of penetration and melt Also result interpretation of so few tests may be problematic. An entirely different situation can be seen in case of application in coke-making industry (Fig. thermal conductivity is desired and coking temperatures are much lower than corrosion test temperature. of the monitored parameters is provable and there are no problems with result interpretation. As the text above reveals, the different behaviours of individual applications must be taken into account when optimising the properties of silica materials. II. OBJECTIVE During the production of silica materials it is advisable to use such additives which accelerate the during silica bricks firing and have an influence on its resulting mineralogical composition. Such additives are Fe-pigments and Fe-dust. The goal of this research was the investigation of the influence of the granulometry of these Fe properties of silica bricks which have the greatest impact on its durability in the structure of an oven (strength, porosity, bulk density and mineralogical composition). the influence of the method of homogenising and the length of firing on these properties was observed.

The Influence of Mineraliser Granulometry on Dense Silica Brick Microstructure

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

K. Lang

Author Tools

Chat about Author

Papers

The Influence of Mineraliser Granulometry on Dense Silica Brick Microstructure