Method of stabilizing the surface of a fibrous body made of oxide or non-oxide ceramic fibres

摘要

2.1 Current fibre blocks, plates and hollow bodies have the disadvantage that they are subjected to very severe erosion effects during handling, transport, installation and in use such as, for example, as a burner tube, especially at high inflow velocities and through-flow velocities. Even on handling in the dried state, these fibre mouldings tend to release fibre constituents in the form of individual fibres and also fibre fragments which, depending on the size, can enter the lungs and represent a considerable health hazard potential, even up to a carcinogenic effect. 2.2 The disadvantages described are to be avoided and handling without problems and through-flow or outflow without hazards is to be ensured. The process is characterised in that a protective film of waterglass, boehmite sol, thioglycolate solution, thiolactate, Teflon, resin, varnish and/or wax, if appropriate with added surfactants, is applied to the surface of the fibre moulding, producing a physical and/or chemical bond with the fibres. 2.3 Preferred use of the process for the manufacture of burner tubes.