| 摘要 |
The process for producing refractory mouldings, in particular boards, is proposed in which a cellulose fibre material, in particular waste paper and/or wood pulp, is impregnated with an aqueous solution of aluminium sulphate and then mechanically disintegrated. The resulting mash is pressed into the desired shape, about 85 to 95% of the solution being removed. The remaining solution has a higher density, i.e. a higher aluminium sulphate content, than the liquid pressed out. The object thus pressed is then dried at about 200 DEG C. The finished moulding did not yet burst into flames even at 2000 DEG C and withstood flaming with a bunsen burner over a period of up to 40 minutes, without smoke evolution occurring.
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