Heat Applications India Private Limited

As the pressure to reduce routine maintenance and shutdown periods is increased, any significant time savings that can be made without compromising production are at a premium. One area where HAL can make a real time saving is in the draining of furnace contents prior to cool down.
Drilling one or more holes in the furnace and guiding the glass into a specially design water cooled sledge which is fitted with a high pressure water jet, which in turn carries, and sinters the molten glass and discharges in a predetermined area usually outside the factory. Specialized drilling equipment, draining equipment, including high-pressure water pumps, and glass flow control equipments are supplied by HAL for this service.

HAL can provide highly trained personal for drilling the glass melting furnace in hot/cold condition, for the introduction of thermocouples, bubblers, and boost electrodes.

Any sizes and any types can be handled by our experienced personnel and we can also be called upon to remove such equipment when required.

After heat up, the quickest way to re-establish a working level is to charge with cullet introduced in such a way as to give the most rapid melt down rate without chilling any part of the furnace refractory.

The highest ratio of surface area to unit weight plus spreading the cullet over as large an area of the melter hearth as possible are the requirement for a swift cullet fill. Cullet fill normally commences from 1400°C. Melting rate of up to 60 tons/hr. on float furnaces can be attained, depending upon the size & type of furnace.

Dependant upon the furnace and dog house type the HAL cullet blowers take the form of either a water cooled box pattern which enters the furnace under the charging arch or a shorter single skin "Hot Air" unit which attaches directly to the outlet of a service burner. This precisely controls the cullet flow and the direction of the cullet to give a wide distribution over the hearth area. In ideal circumstances the cullet formed after an HAL tapping operation is blown back into the furnace under accurate control. The temperature of the furnace is carefully monitored throughout the operation, with particular attention to the throat and riser, especially when electrical backup heat is not available. In certain circumstances it may be advise to provide a temporary bubbler in the throat and the riser to prevent any possibility of freezing the glass in this area.