Service and repair of the rammed lining of a rotary furnace
The rotary furnace is designed for heating of carbon and alloy steel billets 100-150 mm in diameter and 1000-3800 mm long with a maximum weight of 350 kg to 1130-1260 degrees C. The furnace hearth lining is made in three layers. The top of the center layer is made of parts laid with gaps between them of 20-30 mm. The 80-90-mm-thick working layer is made of type MKhGP-35 rammed chromite-clay compound. To protect the top of the side parts of the hearth from impacts, they are covered with a 40-mm-thick layer of rammed MKhGP-35 compound. During operation of the furnace and heating of the billets, the rammed compound of the hearth is compacted and after 6-7 months of service waves up to 20-30 mm deep are formed on it from the action of the round billets. To avoid the condition in which the unloading machine is not able to take the heated billets from such a hearth, ramming compound is added to the depressions in the hearth through the charging door. The furnace temperature is brought up to the heating schedule and billets are charged. The rammed lining is completely replaced once every two or three years. The saving with such a method of repair of the worn rammed hearth during 2 years of operation of the rotary furnace is substantial.
- Research Organization:
- All-Union Refractory Institute
- OSTI ID:
- 5500014
- Journal Information:
- Refractories (Engl. Transl.); (United States), Vol. 28:8
- Country of Publication:
- United States
- Language:
- English
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42 ENGINEERING
FURNACES
LINERS
REPAIR
SERVICE LIFE
REFRACTORIES
CHROMIUM OXIDES
CLAYS
COMPACTING
FLOORS
HEAT RESISTANT MATERIALS
HEAT TREATMENTS
MAINTENANCE
OXIDE MINERALS
STEELS
ALLOYS
CHALCOGENIDES
CHROMIUM COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MINERALS
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
421000 - Engineering- Combustion Systems