Specifications

the advantage of mechanical strength,
excellent stability of thermal shocking,
resistance to corrosion of glass liquid.

HDZ-65 mainly used in glass contact portion of alkali free or low-alkali glass melting furnace, especially some special region of glass tank, such as paving part and secondary layer of paving bottom, wall and bottom of forehearth, flowing spout and spinning portion and melter, back lining of forehearth, and also used in lining of other quality glass furnace and special glass furnace with high corrosion resistance, such as boron silicate glass, ceramic glass, low-alkali or other technical glass.

 

HDZ-68 mainly used in glass fibre melting tank furnace, in which thermal shock are frequently, require high quality to glass and the area contacting with glass liquid, such as melter sidewall, paving bottom, forehearth, refiner, flowing spout, spinning portion of melting tank, and also used in related area of the furnace for melting boron silicate glass, ceramic glass, low-alkali glass or other technical glass.

 

 

Item	HDZ-65	HDZ-68
ZrO2 (%)	≥65	≥68
SiO2 (%)	≤33	≤30
Fe2O3(%)	≤0.3	≤0.3
Apparent Porosity (%)	≤1	≤8
Bulk Density (g/cm3)	≥4.25	≥4.15
Cold Crushing Strength (Mpa)	≥310	≥200
0.2Mpa Refractoriness Under Load T0.6 °C	≥1680	≥1680
Pyrometric Cone Equivalent S.C. SK	40	40
Reversible Thermal Expansion 1000°C %	0.5	0.5