Refractories Used in Glass Tank Furnace for Sale

The functions of glass tank furnace may be summarised as heating, melting, refining, controlling the smelted glass temperature and forming. These days a glass tank furnace is built to perform these functions simultaneously and is heated mainly by an air-heavy oil combustable system.

Glass Tank Furnace Refractories

RS Group offers refractories for the melter, working tank (for refining & homogenising and keeping the temperature of smelted glass), upper structure, keeping combustion pace, and pieces. RS caters to refractory requirements from both the two systems being side & end port broadly. The main wear factors with regards to the locations are summarised as follows:

a)Corrosion by smelted glass - Melter, Throat, Glass Contact in working lane

b)Corrosion by alkali vapours- Upper Structure, Crown

c)Wear by condensed alkali & temperature variations - Electrical generator walls & ceiling.

Found in glass contact areas, wear of refractory progresses through the dissolution of the refractory composition into the hot temperature molten glasses. RS offers high quality Fused Cast Alumina Zirconia Silica Refractories for use in the glass contact areas (except for glass fiber). High ZrO2, AZS fused cast refractories are being used for severe corrosion areas at the back of the glass tank. These refractories have got high corrosion resistance level.

AZS fused cast refractories

For areas encountering low corrosion (front zone of the melting tank), standard ZrO2 AZS Fused Cast Refractories are being used.

In the working tank container, the temperature is low and mild but refractories influence the quality of glass. Here, Fusion Alumina and AZS Refractories are deployed. AZS are preferred since they own higher corrosion resistance than fused cast alumina refractories.

The throat being the narrow path connecting the melter and the working tank, where the temp is high and witnesses a rapid glass stream, it is susceptible to severe erosion. Here high ZrO2AZS Fusion Cast refractories are used.

For fibreglass furnaces, RS offers dense chromium and dense zircon refractories to prevent problems associated with colouring of the products. These have better corrosion resistance than AZS Fused Cast refractories but lower spalling resistance.

The upper structure consists of the crown, wall and port. Requirements from the refractories are different specific to the location..

At the back of the melting furnace, refractories react with the batch carrying as well as alkali fumes. At the front side & cooling zone, refractories are corroded by alkalinity attack. Crown requires high RUL bearing and high creep resistance possessing silica bricks. When the furnaces are insulated from the heat for energy preservation, heavy-duty silica bricks with lower impurities are used.

Silica Brick For Glass Tank Furnace in RS

Regenerator contains checker bricks, which serve as a medium of heat exchange, and consists of a ceiling and sidewalls. Here, the carrying over batch besides alkali vapour attack chemically corrodes refractories. Thermal spalling also damages the refractories in this part of the furnace.

Checker brick for glass kiln

Magnesia bricks are being used in the top part of the pieces. At the highest part, the bricks experience temperature ranges scaling 1500 Deg C and react with carry over batch to create Forsterite and crystal regarding periclase commences. This brings about creation and growth of cracks and eventually collapses. High purity magnesia bricks help in reducing this phenomenon.

Magnesia bricks used in glass tank furnance

RS Group offer complete refractories for the Glass Tank Furnaces, such as: fused AZS bricks, fused corundum bricks, silica bricks, high grade magnesia bricks, magnesite chrome refractory bricks, magnesia alumina spinel bricks, fire clay bricks, insulation refractory materials, etc.