Materials for the production of primary aluminium. Dense refractory bricks. Determination of cryolite resistance Ingestion-build-232773 BS 1911:1990 includes some technical

BS 1911:1990 includes some technical changes with respect to BS 1911:1985

Fire Alarm Warnings for Deaf and Hard of Hearing People

and their use is strongly recommended

Land/soil surveyors

or can be provided with the device

Materials for the production of primary aluminium. Dense refractory bricks. Determination of cryolite resistance Ingestion-build-232773 BS 1911:1990 includes some technical1 Scope This International Standard covers materials for the production of primary aluminium. This International Standard specifies a method for the determination of the resistance of dense refractory bricks to cryolite melt with excess sodium fluoride.