METHOD OF PRODUCTION OF A POROUS BILLET OF GLASS (ALTERNATIVES) Russian patent published in 2005 - IPC

FIELD: glass industry; production of large porous billets.

SUBSTANCE: the invention is dealt with the process of homogeneous deposition of glass microparticles at production of large porous billets. The method of production of a porous billet of glass provides for measuring distribution of surface temperature T_m of a butt part core of a porous stock material of a glass and maintaining the surface temperature T_c in the central point of the core on the butt part of the porous billet of glass within the range of 500°C up to 1000°С and, more preferably, within the range of 600 up to 950°С. Maintaining temperature difference T_m - T_c between the maximum surface temperature_{Тm of the butt part of the middle of the porous billet of a glass and the surface temperatureTc of the central point of the core of the butt part of the porous billet of a glass makes from 5 up to 45°С. Maintaining of a share of area R, in which surface temperature of the butt part of core of the porous billet of a glass is higher, than the surface temperatureTc in the a central point of the butt part of the core of the porous billet of a glass, within the range from 5 up to 30 %. The technical result is stability of introduction in a porous billet of a glass of an alloying addition and a capability to prevent formation of a porous billet with a pulled surface.}

EFFECT: the invention ensures stability of introduction in a porous billet of a glass of an alloying addition and a capability to prevent formation of a porous billet with a pulled surface.

4 cl, 8 dwg