Product Data
Brightcross Exothermic riser sleeves are self heating by means of an exothermic reaction taking place within the sleeve. This reaction is initiated on contact with molten iron or steel. The exothermic reaction generates heat over an extended period. The sleeves are also highly insulating.
Exothermic sleeves are produced by dewatering a slurry containing ceramic fibre, aluminium metal, oxidising agents and refractory fillers, starch and silica. The resulting items when dried are rigid, grey/brown in colour, low density.
Typical Physical Properties
| Colour | grey/brown |
| Density | 350 - 450 kg/m³ |
| MEF | 1.6 (modulus extension factor) |
Typical Chemical Analysis
| Al2 O3 | 30 - 35% |
| SiO2 | 30 - 35% |
| Al | 20 - 25% |
| Fe2O3 | 0 - 10% |
| Insoluble Fluoride | 5 - 10% |
| Ignition Loss | 4 - 6% |
Health & Safety
Exothermic sleeves are difficult to ignite by normal means. Exposure to continuous high temperatures is required such as contact with molten ferrous metals. When ignited, the sleeves burn in a controlled manner, liberating intense heat.
Exothermic sleeves contain ceramic fibres, silica and inorganic fluorides. Inhalation of dust, or fume arising from burning sleeves should be avoided. Good ventilation should be provided in areas where the product is being used. Suitable dust extraction should be used in areas where moulds are knocked or shaken out. A high level of personal hygiene should be observed so that inhalation or ingestion of the product is avoided. e.g. from residue on hands or clothing.
The product should be stored in a dry fireproof area away from any source of ignition. "No Smoking" rules should be strictly applied. Dust accumulations from stored product should be removed by means of a vacuum cleaner with flame proof electrics.
In case of fire, do not use water on exothermic materials. The fire should be completely smothered with sand or other inert material.