After covering all the exposed steel surfaces with ganister, the plates are put in a gas furnace and heated to a welding heat.    From Wordnik.com.  [Scientific American Supplement, No. 803, May 23, 1891] Reference

For furnace linings, the quartzite or ganister must be exceptionally pure.    From Wordnik.com.  [The Economic Aspect of Geology] Reference

The principal uses of sandstone are for building stone, crushed stone, and ganister (for silica brick and furnace-linings).    From Wordnik.com.  [The Economic Aspect of Geology] Reference

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.    From Wordnik.com.  [Scientific American Supplement, No. 303, October 22, 1881] Reference