The flame space of the glass furnace includes the front wall, the crown, the breast wall,
burner and gas space divider. These parts are not only subjected to the high temperature
corrosion by dust and molten glass but also bear high temperature loads and periodic
temperature fluctuations caused by the exchange of fire (50-100℃)
.
Traditionally, silica brick is used in those parts, but with the use of the fuel with high heat
value or oxygen-enriched combustion technology, the temperature of the furnace is
increased. So, high quality silica brick, fused cast AZS, α-fused cast alumina block,
α+β-fused cast alumina block and β-fused cast alumina block are widely used now.
The front wall is subjected to the wear and corrosion by the batch materials and servere
erosion by overflow flame. Fused cast AZS block 33# or high quality silica brick and
sintered AZS block arem used. Besdies, air cooling is required to protect the front wall.
The crown and the breast wall are mainly subjected to the honeycomb pitting and burning
by the alkali sulfate. Refractory bricks used in these parts should have good corrosion
resistance to the molten glass volatiles, high softening temperature under load
and good creep resistance. silica brick, high quality silica brick and fused cast AZS 33#
can be used.
The refractory bricks used in the burner should have excellent resistance to high
temperature, corrosion, erosion and thermal shock. When the producer gas is burnt (the
thermal load is low), silica brick and even kaolin large brick can be used, but the tongue
brick must adopt fusede cast AZS 33# block. When high calorific value fuel is burnt (the
thermal load is high), fused cast AZS 33# can be used in the port, oblique arch interlayer
and burner block and fused cast AS 41# can be used in the thinnest part. Slope arch and
arch horizontal channels should use silica brick and the bottom brick can use dense
sintered cordundum brick.The gas space divider of the float glass furnace can use the same
materials with the crown. The gas space divider of the daily glass furnace can use silica
brick or sintered mullite brick.
برچسبها: فضاهاي تحت تاثير شعله و حرارت در كوره هاي ذوب شيشه
تاريخ : چهارشنبه بیست و چهارم آذر ۱۳۹۵ | 19:38 | نویسنده : علیرضا حسینی |
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