Investigation of critical failures using root cause
kiln refractory brick failure Unlike the previous plant based investigations which continuously attributed the failure causes to refractory brick design/manufacturing the current approach provides a detailed almost macroscopic dimension of vulnerabilities in maintenance operations and quality practices in the plant
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REFRACTORY FAILURE INVESTIGATION IN CFBC
REFRACTORY FAILURE INVESTIGATION IN CFBC BOILER 1 Heavy industrialization modernization of society demands in increasing of power cause to research develop new technology efficient utilization of existing power units Variety of sources are available for power generation such as conventional sources like thermal hydro nuclear and
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of main steel and bent in a rectangle shape to prevent shear failure called stirrups 1 1 2 Beam geometry and cross section For this master thesis a singly reinforced concrete RC beam and a doubly RC beam simply supported and subjected to pure bending are selected for comparison between analytical and numerical methods
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Refractory failure in entrained flow gasifier
Based on an industrial OMB gasification plant a systematic investigation of refractory failure characteristics has been conducted for the first time In this study a complete image of the spent refractory material inside the gasifier was obtained to study the macrostructure and the partitioned erosion characteristics based on systemic industrial operating data
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Refractory failure in entrained flow gasifier Vision
The corrosion and erosion mechanism are different from other gasification technologies and a systematic investigation on the whole refractory failure of OMB gasifiers has been conducted for the first time In this study the macrostructure refractory failure has been investigated by advanced vision based techniques
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Using the method involving primary heating and cooling of large blocks of refractory concrete that is by measuring the pressure of the steam in the concrete and the deformation of the block surface it is possible to experimentally establish the drying and cooling cycle for blocks of different construction and made from different materials To prevent the appearance of cracks inside the
Get PriceCiteSeerX INVESTIGATION OF REFRACTORY CONCRETE FAILURE
The main tool of the investigation was finite element computer modelling The models were supported by extensive material testing and post mortem investigations of the failed structures 1 REFRACTORY CONCRETE Refractories are bulk ceramic materials composed of oxide and non oxide components with a rather coarse grain matrix structure
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Evaluation of Failure Modes for Concrete Dams
Chapter 2 includes a presentation of theory behind the key concepts of concrete gravity dams The main features for stability analyses of concrete gravity dams are presented The different design loads for the stability analysis are stated and illustrated A brief presentation of the causes of concrete gravity dam failure by
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Understanding Refractory Failure A New Perspective
A refractory failure is the number one cause of boiler inefficiency and a major contributor to boiler shut downs Refractory that is properly selected and installed will always last longer help minimize the amount of shutdowns required and lead to savings in annual fuel cost
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Investigation of Alkaline Hydrolysis in Refractory Linings
Owing to the project complexities and installation schedules refractory lined equipments are often stored at project sites for prolonged times leading to non performance and premature failures One of the main reasons for such failure especially for plants in the vicinity of a seacoast is alkaline hydrolysis or carbonation of refractory linings
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INVESTIGATION OF STRENGTH AND FAILURE CRITERION OF
Cubic concrete specimens were tested under bi and tri axial stresses states by the authers in which 45 pieces of them were tested under tensile compressive compressive or tensile tensile compressive stresses All the experimental data are summarized in this paper The regularity of the varying strength of concrete under different stress conditions are analyzed Five kinds of typical failure
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Refractory lining failure investigation key issues STM 11 KSA 5 نوفمبر، 2014 Corrosion of boiler tubes under refractory concrete a case study MS T 14 Pittsburgh USA أكتوبر 2014 Refractory lining design of process furnaces fired with high sulfur fuel Chat Online How to Destroy a Boiler Part 1
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This report provides an overview of refractory concrete materials and the existing specifications at KSC for refractory concrete reviews recommendations made by Trejo and Calle in 2004 for developing a new specification for refractory products presents findings from pre and postlaunch inspections of the flame
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Investigation of refractory concrete materials with
Petrographic methods are used to investigate concrete alumosilicate materials produced by the Semiluki Refractory Works on fireclay fill and an integral binder based on high alumina cement The microscopic investigations showed that as the result of heat treatment of concrete up to 380°C degradation processes are essentially completed in the binding substance and formation of a glass
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Failure Analysis or InvestigationMetallurgical
Failure analysis or investigation is the process of collecting and analysing facts or data to determine the root cause of a failure This involves collecting data about operating conditions visual examination of the failed product or component fractography non destructive testing evaluation of mechanical and chemical properties metallography microscopy spectroscopy analysis of the facts
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SpallingSigns of Refractory Failure RG Smith Company
Refractory systems are complicated heavy duty machines and equipment that help make a wide range of products In addition to containing the fire and protecting wall tubes refractory chimneys are a vital part of the process not only allowing out any smoke steam and other excess heat but also saving facilities on fuel costs when correctly designed installed and maintained
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Types and Causes of Concrete Deterioration
Concrete can deteriorate for a variety of reasons and concrete damage is often the result of a combination of factors The following summary discusses potential causes of concrete deterioration and the factors that influence them CORROSION OF EMBEDDED METALS Fig 1 Corrosion of reinforcing steel is the most common cause of concrete
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Petrographic methods are used to investigate concrete alumosilicate materials produced by the Semiluki Refractory Works on fireclay fill and an integral binder based on high alumina cement The microscopic investigations showed that as the result of heat treatment of concrete up to 380°C degradation processes are essentially completed in the binding substance and formation of a glass phase
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Analysis and Solution of Refractory Concrete Failure in a
The American Concrete Institute Founded in 1904 and headquartered in Farmington Hills Michigan USA the American Concrete Institute is a leading authority and resource worldwide for the development dissemination and adoption of its consensus based standards technical resources educational programs and proven expertise for individuals and organizations involved in concrete design
Get PriceCentrifugal Casting of Refractory Concretes
The investigation revealed that the major controlling factor in the production of the centrifugally cast pipe was the workability of the refractory concrete Coal gasification processes require refractory linings in the gasifier unit transfer lines between the preheaters and the gasifiers and exhaust lines leading to the gas scrubbers
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Petrographic methods are used to investigate concrete alumosilicate materials produced by the Semiluki Refractory Works on fireclay fill and an integral binder based on high alumina cement The microscopic investigations showed that as the result of heat treatment of concrete up to 380°C degradation processes are essentially completed in the binding substance and formation of a glass phase
Get Price
Understanding Refractory Failure A New Perspective
A refractory failure is the number one cause of boiler inefficiency and a major contributor to boiler shut downs Refractory that is properly selected and installed will always last longer help minimize the amount of shutdowns required and lead to savings in annual fuel cost
Get Price
Experimental Investigation of Reinforced Concrete T beams
EXPERIMENTAL INVESTIGATION OF REINFORCED CONCRETE T BEAMS STRENGTHENED IN SHEAR WITH EXTERNALLY BONDED CFRP SHEETS Robert M Foster1 Monika Brindley2 Janet M Lees3 Tim J Ibell4 Chris T Morley5 Antony P Darby6 Mark C Evernden7
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Important Considerations for Refractory Dryouts Startups
Important Considerations for Refractory Dryouts Startups Shutdowns 2011 Sulfur Recovery Symposium in Vail CO Brimstone STS Limited September 13 16 2011 Page 1 of 15 This has sometimes led to refractory failure before reaching normal operating conditions or premature deterioration of lining systems leading to unexpected time
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Monolithic Refractory developed in the U S A at the beginning of the 20th century as an innovative alternative to fire brick was first introduced in Japan by AGC Plibrico leading to an epoch making revolution in the refractory field As the pioneer of monolithic refractories Plibrico Japan has since been engaged in the
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Investigation to Ascertain the Causes of Failure and
Investigation to Ascertain the Causes of Failure and Present Traffic Capacity of Highways Abstract The essence of this project work is to look into the causes of highway failure and the different types of failure which are presented along the EliozuNew Airport road
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Tests on Concrete Refractory material
Several types of tests are performed on concrete and refractory materials to determine physical engineering and chemical properties LMATS has experienced staff that can perform and advise adequate tests to determine suitability or reliability of the existing or new concrete ceramic or refractory products Visual inspection is the most common and significant test on concrete structures to
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Investigation of the compressive behavior and failure
A few DIC based studies on localization and concentration of strain for unconfined and FRP confined concrete specimens under bending e g and unconfined concrete specimens under compressive loading e g have shown the benefits and potentials of the technique in furthering the understanding of failure However to the best of our
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Investigation of heating large blocks of refractory
Using the method involving primary heating and cooling of large blocks of refractory concrete that is by measuring the pressure of the steam in the concrete and the deformation of the block surface it is possible to experimentally establish the drying and cooling cycle for blocks of different construction and made from different materials
Get Price
Failure Analysis InvestigationLMATS
Failure analysis is a process of collecting and analysing facts or data to determine a probable root cause of a failure This involves collecting data about operating conditions visual examination of the failed product or component fractography non destructive testing evaluation of mechanical and chemical properties metallography
Get PriceSpallingSigns of Refractory Failure RG Smith Company
Refractory systems are complicated heavy duty machines and equipment that help make a wide range of products In addition to containing the fire and protecting wall tubes refractory chimneys are a vital part of the process not only allowing out any smoke steam and other excess heat but also saving facilities on fuel costs when correctly designed installed and maintained
Get Price
Investigation of the compressive behavior and failure
A few DIC based studies on localization and concentration of strain for unconfined and FRP confined concrete specimens under bending e g and unconfined concrete specimens under compressive loading e g have shown the benefits and potentials of the technique in furthering the understanding of failure However to the best of our
Get Price
Refractory failure in entrained flow gasifier Vision
According to the simulation results and corrosion morphology along longitudinal sections penetration depth of slag on refractory the refractory failure can be classified into dome zone impinging up flow zone impinging/burner zone impinging down flow zone plug flow zone and cone zone in order to investigate the corrosion and erosion of the refractory
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Analysis and Solution of Refractory Concrete Failure in a
The American Concrete Institute Founded in 1904 and headquartered in Farmington Hills Michigan USA the American Concrete Institute is a leading authority and resource worldwide for the development dissemination and adoption of its consensus based standards technical resources educational programs and proven expertise for individuals and organizations involved in concrete design
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Refractory Inspection ALS
ALS Refractory Consulting Inspection is the industry leader for Refractory inspection and testing services ALS core group of Consultants Inspectors have over 200 years combined experience Fluent in the design installation root cause failure analysis and inspection of all forms of refractory linings and anchoring systems
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Numerical Discrete Element Method Investigation on Failure
This study numerically investigates the failure processes of recycled aggregate concrete RAC and natural aggregate concrete NAC A two dimensional simulation based on a discrete element method DEM is conducted with a universal distinct element code UDEC program
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