from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A fine-grained quartzite used to line refractory furnaces.
- n. A mixture of fire clay and ground quartz, used to line metallurgical furnaces.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A hard, fine-grained sandstone, used in manufacturing silica bricks for lining furnaces.
from the GNU version of the Collaborative International Dictionary of English
- n. A refractory material consisting of crushed or ground siliceous stone, mixed with fire clay; -- used for lining Bessemer converters; also used for macadamizing roads.
from The Century Dictionary and Cyclopedia
- n. In mining and metallurgy, a hard, silicious rock forming the floor of some coal-seams in England.
Silica has an important use in the form of silica brick or "ganister" for lining furnaces and converters in which acid slags are formed.
After covering all the exposed steel surfaces with ganister, the plates are put in a gas furnace and heated to a welding heat.
The principal uses of sandstone are for building stone, crushed stone, and ganister (for silica brick and furnace-linings).
For furnace linings, the quartzite or ganister must be exceptionally pure.
a thick lining of ganister to prevent loss of heat and oxidation of the metal, and at the bottom of this cylinder is a grate on which a fire is built up.