Furnascote CF

High Temperature Surface Coating
and Ceramic Fibre Binding Agent

Product Information

Furnascote CF is a zircon based refractory composition specially developed for use as a surface coating and binding agent for ceramic fibre and other lightweight refractory insulation materials.

Furnascote CF will provide protection against chemical and physical attack at temperatures upto 1900°C.

Introduction

Furnascote CF, as part of the Furnascote family of Refractories is characterised by a very high zircon content (<60%), which imparts high chemical resistance against the aggressive environments typical of furnaces and boilers burning fossil and hydrocarbon fuels. By binding the surface fibres and forming a thick skin over the ceramic fibre linings, Furnascote CF also strengthens the surface of an otherwise weak material greatly improves its resistance to erosion in areas subject to high gas velocities, flames, splashes from molton metals and many industrial chemical processes. The ceramic fibre is then able to serve closer to its general classification temperature. Improved insulation is also achieved as the layer of Furnascote CF stops the passage of hot gases into the fibre lining reducing heat loss from radiated energy into the fibre.

Mixing

Mix 5kg of Furnascote CF briskly with 1.7 litres of clean, cold water using a mechanical stirrer for 2 minutes. Allow to stand after mixing for about 40 minutes (or longer if schedules allow) then re-mix (mechanically) for a further three minutes adding more water at this stage for any final adjustments to viscosity bearing in mind the final application method.

Pre-Wetting

For the strongest coating on blanket, soak the fibre surface with cold water to a depth of 5mm to 10mm and then compact the wetted surface before applying the Furnascote CF.

Typical Application and Features

As a 1mm to 3mm coating applied by spray or brush to ensure surface sealing and protection of all ceramic fibre based refractory materials including blankets, performed blocks and modules.

• Increased erosion resistance to flames and high velocity gases from approximately 12m/s to 30 to 50m/s.
• Reduced surface dusting and broken fibre breakdown.
• Protects fibre against chemical attack from combustion gases and harsh process environments.
• Allows fibre to work closer to its specified maximum working temperature.
• Reduces the penetration of hot gases into the fibre.
• Reduces heat loss from energy radiated into the fibre.
• Improves the insulating quality of the fibre.
• Increases the lifespan of ceramic fibre linings.

Drying

Allow the coating to dry out completely before firing.

Coverage

1mm of dried Furnascote CF over 1m² weighs 3kg.

Pack Sizes

Furnascote CF is supplied as a dry powder in 5kg and 20kg plastic tubs.

Shelf Life

Indefinite, if stored as a powder in airtight containers as supplied. Approximately 7 days after mixing with water.