Specialty graphites for the manufacturing of float glass

Float glass requires consistent high quality, absolute precision, flawless appearance, and the highest purity possible. Our materials and components for the continuous manufacture of large-format float glass are impressive in every respect.

SGL Carbon's portfolio is tailored to meet the demanding requirements and highly specific machinery used by float glass. In view of the high temperature of the tin bath of 1100°C (2000°F), a graphite edge insert is essential. The main reasons for using extruded graphite here are its high corrosion and abrasion resistance.

Our ash-reduced grades such as SIGRAFINE^® R7550 have a particularly long service life, which helps keep plant maintenance costs to a minimum.

For more demanding requirements, we supply special impregnations (NOX treatment) that further increase oxidation resistance and consequently the service life of the materials and components.

Our precision components and systems produced from SIGRAFINE fine-grain graphites offer maximum process reliability. Typical examples include ready-to-use profiles and barriers, sometimes in extreme lengths, for tin bath walls. SIGRATHERM^® soft felts hereby ensure the thermal insulation. This also makes the most of the advantages of extruded graphite in conveying systems, rollers, and scrapers. In the refining section, it is combined with isostatically pressed graphite.

Extruded graphite		Isostatic graphite	Soft graphite felt
SIGRAFINE HLM		SIGRAFINE R7550	SIGRATHERM GFG5	SIGRATHERM GFA10
300 x 1220 x 1830 mm	600 x 600 x 3300 mm	400 x 500 x 1230 mm	6.0 x 1220 x 25000 - 30000 mm	11.5 x 1270 x 25000 - 30000 mm
400 x 500 x 3500 mm	610 x 760 x 1830 mm
500 x 500 x 1830 mm	610 x 760 x 2030 mm
500 x 500 x 2750 mm	610 x 760 x 2540 mm