HEAT CURE

For the heat setting plastic refractories (except CH group), you should start heat curing as soon as possible you can, after the installation of the material is completed. The material slowly starts stiffening, after it contacts air. For to get best characteristic and performance results from the lining, you should apply a low degree dry-out program.

Heating Procedure For Ceramic Bonded-Heat Setting Plastic Refractories

The schedule for plastic refractories is shown below :

• Raise the temperature to 80-90°C at a rate of 17°C / hour.

• Hold the temperature constant for 6 hours.

• Raise the temperature to 150°C at a rate of 17°C / hour.

• Hold the temperature constant for 5 hours.

• Raise the temperature to 350°C at a rate of 17°C / hour.

• Hold the temperature at 350°C for one hour per every 25 mm of lining thickness.

• At last, raise the temperature over 50°C of the normal working temperature.

Notes :

The heat curing procedure for refractory materials entails more than a schedule. Issues such as burner sizing, exhaust location, air volume and velocity need to be determined. At this point, Kiltaş recommends you to contact people who has experience and is professional about dry out.

For any reason, if the heating schedule is interrupted, we advice you to start up the schedule from beginning. By taking risk, you can continue to the rest of the procedure. But in this case, Kiltaş has no responsibility about the discomposure of the material.

Heating Procedure For Phospate Bonded-Air Setting Plastic Refractories

You should provide controlled release of water in the plastic refractory material to prevent forming of build-up stream and steam spalling. You should cover the surface of the refractory with a plastic, canvas or burlap. We advise you to choose plastic sheet. Because canvas or burlap covering need to be wet to prevent moist loses. When you start the heating program, you should continue until it finishes. Do not stop.

• Raise the temperature to 150°C with a heating rate of 25°C/hour.

• Hold at this temperature 1 hour per 25 mm of material. Do not exceed 8 hours.

• Raise the temperature to 325°C with a heating rate of 25°C/hour.

• Hold at this temperature 1 hour per 25 mm of material. Do not exceed 8 hours.

• Raise the temperature to 550°C with a heating rate of 25°C/hour.

• Hold at this temperature 1 hour per 25 mm of material. Do not exceed 8 hours.

• After you hold at 550° C for necessary duration, raise the temperature to operation degree with a rate of 24° C/hour. If the process will not work and calm down. Hold the temperature at the opration degree for 1 hour per 25 mm material and than let to be calm down naturally. Do net let to exceed 38° C/hour.

Notes:

The heat curing procedure for refractory materials entails more than a schedule. Issues such as burner sizing, exhaust location, air volume and velocity need to be determined. At this point, Kiltaş recommends you to contact people who has experience and is professional about dry out. For any reason, if the heating schedule is interrupted, we advice you to start up the schedule from beginning. By taking risk, you can continue to the rest of the procedure. But in this case, Kiltaş has no responsibility about the discomposure of the material.

Heating Procedure For Castable Refractories

This dry-out program is given for the average amount of material as an information guide. You should apply our company for the different refractory labels, amounts and widths. The correct application of heat curing and controlled release of water in the castable is very important for the life time and performance of the materials. The schedule for castable refractory is shown below :

• As the first step of heat curing, raise the temperature to 100°C at a rate of 17°C/hour.

• Hold the temperature at 100°C for minimum 24 hours. But do not raise the temperature until the steam finishes.

• Raise the temperature between 350°C – 550°C at a rate of 20°C/hour and hold the temperature again for minimum 24 hours and additional 2 hours per extra 25 mm.

• Raise the temperature to 750°C at a rate of

30°C/hour.

• If vapouring still continues at this temperature at the back-up, hold the temperature you observed

vapouring until the vapouring finishes.

• As the last step, you should wait at 50-100°C over the working temperature at least for 8 hours. After this last waiting, you can decrease the temperature to the operation values and start working.

• If there is a insulation castable layer behind the castable, the time necessary for the dry-out must be increased 2-3 time.

Notes:

The heat curing procedure for refractory materials entails more than a schedule. Issues such as burner sizing, exhaust location, air volume and velocity need to be determined. At this point, Kiltaş recommends you to contact people who has experience and is professional about dry out. During the dry-out application, the temperature at the refractory surface should be monitored from several locations. If you observe steaming during the heating schedule, you should fix the temperature until the steaming ends. For any reason, if the heating schedule is interrupted, we advice you to start up the schedule from beginning. By taking risk, you can continue to the rest of the procedure. But in this case, Kiltaş has no responsibility about the discomposure of the material.

 

Heating Procedure For Insulating Castable Refractory

The correct application of heat curing and controlled release of water in the insulating castable is very important for the lifetime and performance of the materials. The schedule for castable refractory is shown below :

• As the first step of heat curing, raise the temperature to 150°C at a rate of 25°C/hour.

• Hold the temperature at 150°C for minimum 24 hours. But do not raise the temperature until the steam finishes.

• Raise the temperature between 350°C – 550°C at a rate of 25°C/hour and hold the temperature again for minimum 24 hours and additional 2 hours per extra 25 mm.

• Raise the temperature to 750°C at a rate of 30°C/hour.

• If vapouring still continues at this temperature at the back-up, hold the temperature you observed vapouring until the vapouring finishes.

• As the last step, you should wait over 50-100°C of the working temperature at least for 8 hours. After this last waiting, you can decrease the temperature to the operation values and start working.

Notes:

This dry-out schedule is given for the situations that insulating castable is used alone. You should contact

us if there are different refractory layers. Temperatures given above are measured at the hot face lining for in place heating. Allow the lining to cool down naturally. Do not exceed 56°C/hour cooling rate. The heat curing procedure for refractory materials entails more than a schedule. Issues such as burner sizing, exhaust location, air volume and velocity need to be determined. At this point, Kiltaş recommends you to contact people who has experience and is professional about dry out. During the dry-out application, the temperature at the refractory surface should be monitored from several locations.If you observe steaming during the heating schedule, you should fix the temperature until the steaming ends. For any reason, if the heating schedule is interrupted, we advice you to start up the schedule from beginning. By taking risk, you can continue to the rest of the procedure. But in this case, Kiltaş has no responsibility about the discomposure of the material.

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