FURNACES AND REFRACTORIESModern Eq
refractory shape inside the furnace and to minimize space between construction joints Bulk density The bulk density is useful property of refractories which is the amount of refractory material within a volume kg/m3 An increase in bulk density of a given refractory increases its volume stability heat capacity and resistance to slag
Get Price
Secondary Reformer Refractory Dry Out OperationIJERT
Dry out is the initial heating of castable lining in order to remove retained water from within the refractory castable without adversely affecting its structure or physical properties The secondary reformer having monolithic refractory material contain water or water based liquid which are needed to place the material and help the setting
Get Price
PDF Secondary Reformer Refractory Dry Out Operation
Dry out is the initial leaves the reforming section at about 1000°C It is cooled to heating of castable lining in order to remove retained water about 360°C in the Waste heat boiler 11 E 208 where 120 from within the refractory castable without adversely kg/cm2g saturated steam is produced
Get Price
Deflocculants for refractory castables review
Sarkar R Samant A D Study on the effect of deflocculant variation in high alumina low cement castable InterCeram International Ceramic Review 2016 pp 28 34 Doi 10 1007/BF Woeyer Chr Auvray J M Zetterstrom C Dry out of dense refractory castables via use of permeability enhancing active compounds
Get Price
High Performance Castable Refractories for Cupola
rapid dry out capability for the application The elimination of the CaO Al 2O 3 cement phase should also provide a bonding matrix that is mullite based and therefore more refractory Additionally the elimination of metallic additions that can lead to the evolution of hydrogen gas during curing
Get Price
Drying methods for monolithic refractories
The installed monolithic refractory lining contains much moisture just after the removal of the formwork at the time of completion of curing because mixing water is added for installation Following the removal of the formwork heating up for drying is necessary Heating up for drying to the operational temperature of the installed monolithic
Get Price
Challenges and key considerations of refractory dry out
The actual refractory dry out procedure heating rates hold points are always agreed upon between the owner material supplier/designer refractory installer and last but not least the dry out subcontractor in order that all parties have signed off their agreement prior to the commencement of the dry out operation
Get Price
Refractory Dry Outs National Heat
An effective dry out procedure and one carried out in compliance with the manufacturers specification is the key to ensuring that a furnace operates to both the manufacturers specification and the operators expectations National Heat has over ten years of experience undertaking refractory dry outs for many clients around Australia
Get PriceMonolithic Refractory
Gunning castable refractories for dry and semi dry gunning installa tion Wide range of products including basic oxidation resistant SiC and providing well thought out and field oriented services such as carrying out Castable Refractory Plicast Insulating Castable Plibrico Plastic Refractory Plisulate Insulating Ceramic Fibers 4 2013
Get Price
Calderys Installation Manual for Refractories CIM
Keep dry 03 Avoid storing in direct contact with wall or ground 04 First in first out FIFO 05 Must be used within shelf life period 06 Can be stored for long time 07 Frost free 08 Stack maximum 2 pallets high Table 1 2 Material storage conditions No Item storage Code see table 1 1 A Dense and insulating castable Gunning/
Get PriceCastable refractory curing and drying procedure
I ll be using castable refractory cement with high alumina I ve got a usage manual from the refractory company the correct procedure is after drying the cement about 48 hours the first drying and firing waaaay too long Guide says I have to go up 150 C in 6 8 hours and keep at that temp about 12 hours then in 12 hours I have to go up to
Get Price
Refractory Dry Out ProcedureBanks Engineering
Boiler Refractory Dryout Courtesy of Rentech Boiler Systems Refractory Dry Out Procedure The refractory material was not normally thermally cured at the factory It is not uncommon for moisture to be absorbed by the refractory during final stages of in shop fabrication transit to the job site and before the upstream combustion products are first passed through the unit
Get Price
Refractory Dry Outs National Heat
Services Refractory Dry Outs Newly built or repaired refractory lined furnaces generally require a start up under controlled conditions This involves a gradual step by step heating of the furnace that is in compliance with the manufacturers specifications This process may take many days
Get Price
Kaolite InsulatingJohn J Moroney John J Moroney
Highest strength is obtained with castable refractory by using the least amount of clean mixing water This will allow thorough working of material into place by vibrating or rodding A mechanical mixer is required for proper placement paddle type mortar mixers are best suited After achieving a ball in hand consistency mix for 6 minutes
Get Price
Points to Remember When Using Castablessparref
1 Always store castables in a cool dry area Use the oldest castables first 2 Mixers and tools must be clean and free of any old castable cement or foreign material that may contaminate the mix Any material of this nature will affect the set time and/or the ultimate strength of the castable 3 Use only clean drinkable water for mixing
Get PriceImportant Considerations for Refractory Dryouts Startups
Refractory dryout is the controlled process of applying heat to a refractory lining to remove water from the lining system without causing damage to the refractory materials Whenever linings are heated up from ambient temperatures whether it be the initial heatup after a new lining installation or a subsequent heatup of an existing lining after an outage heatup procedures ramp rates and hold points should always be thoroughly discussed and agreed upon by the owner lining designer lining installer refractory
Get Price
Secondary Reformer Refractory Dry Out Operation
Dry out is the initial heating of castable lining in order to remove retained water from within the refractory castable without adversely affecting its structure or physical properties
Get PriceREFRACTORY APPLICATION PROCEDURE
Insulating bricks used as a back up bricks on the colder side of the refractory walls Refractory tiles used for gas baffling in the boiler bank area Ceramic blanket used in between refractory insulation bricks LT castable used for lining hot gas duct High alumina castable refractory –used for casting insitu This is used for abrasion resistant application
Get Price
Steps to Refractory Installation for Successful Refractory
2 Curing the Refractory Lining The castable refractory curing procedure is the process where the water reacts with the refractory cement is completed when the refractory material has hardened to its final form However it is an intricate process This is because the temperature of surroundings and castable can impact curing success
Get Price
IS 10570 2011 METHODS OF TESTING REFRACTORY
usual procedure of coning and quartering 5 2 Test Method Dry sieve analysis of the sample shall be carried out in accordance with IS 1528 Part 14 using the appropriate sizes of sieves 6 CHEMICAL ANALYSIS 6 1 Sample for chemical analysis should be selected based on the sieve analysis After sieve analysis
Get Price
Installation methods for monolithic refractories
5Feed the mixed castable with suitable consistency to the pump as quickly as possible after mixing Do not use again mixed castable that lost its suitable consistency and discard it 6Clean the pump and pipes thoroughly immediately after completion of pumping Gunning dry type In dry gunning castables are slightly premoisted and
Get PriceBoiler refractory dry out procedureBoilersinfo
Start ID and FD fan at minimum load to light up the boiler Ensure that rate of heating is maintained at the rate of 25°C per hour Raise the temperature of flue gas at boiler outlet to 100°C and hold the temperature to up to 10 hours at 100°C for soaking refractory castables
Get Price
Castable refractory curing and drying procedure
I ll be using castable refractory cement with high alumina I ve got a usage manual from the refractory company the correct procedure is after drying the cement about 48 hours the first drying and firing waaaay too long Guide says I have to go up 150 C in 6 8 hours and keep at that temp about 12 hours then in 12 hours I have to go up to
Get Price
Refractory Dry outVersa Integrity
Refractory Dry out When you need to complete the heating cycle on your refractory call Versa Integrity Group The large majority of refractories are rammed casted or gunned in the field As a result of this manufacturing process refractories require drying out on location The dry out constitutes of a heating cycle that is applied to
Get PriceExplosive Spalling of Low Cement Castable Refractories
refractory castables will explode during initial dryout As the refractory castable is heated a volume expansion takes place within the lining as water turns to steam causing pressure to build and the permeability of the material then dictates the rate at which the dryout can proceed if
Get Price
Application Procedure For CastablesRefractory Products
Once in place the castable should not dry out due to exposure or due to the heart produced within the mass Curing should start immediately after the final set of the castables is placed Moist conditions can be maintained by covering the castables with wet sack or by frequent sprinkling of cold water on all exposed surfaces
Get Price
Proper Refractory Dry Out Is Key To Optimum Service Life
The combined efforts of refractory manufacturer installer and dry out contractor result in optimal refractory performance There have been significant improvements in castable and plastic refractories over the past 35 years through the selection of better raw materials improved particle sizing additives improved bonding materials and improved manufacturing processes and placement methods
Get Price
