It is a material which is deposited on the worn out areas of banks and bottom of Electric Arc Furnace (EAF) in hot condition. These are normally applied by shoveling and by using a Fettling Machine for intermittent repairing of Electric Arc Furnace.
The classification and nomenclatures of monolithic refractories have been done on the basis of more than a single criterion out of which one is based on their setting or method of installation. The following are the terminologies of different type of Monolithic Refractory products classified as above:
These are powdered refractory materials mixed with water and/or added with a binder, and with adequate plasticity that can be patched in a place.
Gunning Masses are also un-shaped refractories made after blending graded refractory grains with suitable bonding agents and are installed with a Gunning Machine.
Type of Refractory Gunning Compounds -
These are the Refractory materials especially made for coating on the working surface of the lining having a thin thickness.
These are the refractory materials that can be injected into a furnace in the slurry state.
Powdered or finely ground refractory preparation which becomes plastic and trowel able when tempered with water and is suitable for laying and bonding refractory bricks while furnace lining.
Refractory materials tempered with water and/or added with a binder, which has adequate plasticity to be rammed into a place.
Ramming Masses are the ready-mix unshaped refractory products usually tempered with water, that cannot be extruded but that has suitable properties to permit ramming into a place to form a monolithic refractory structure.
Type of Ramming Masses - 1. Dry Ramming Mass 2. Wet Ramming Mass
These are refractory mix consisting of fines and additives which are installed with a Spraying Machine (can also be applied with a Gunning Machine).
These are dry mix hydraulic compositions of graded refractory aggregates with a suitable bonding material, Fillers & (/or) special Additives. On addition of the prescribed quantity of water to these compositions, a wet concrete-like mass is produced which forms useful castables. Ceramic bond is developed when the same is fired at a certain high temperature.
Type of Refractory Castables -