| 摘要 |
Disclosed is a process for the production of a porous granulated ceramic material with a pore size greater than 1 mm, in which clay is mixed with calcite, quartz sand, dolomite, feldspar, fireclay, kieselgur and/or sepiolite as aggregate material, with water, with a fluidizer and with a surface-active agent and foamed in the usual way. The foamed mixture is subsequently moulded, if required, to form clay mouldings, the mouldings dried at a temperature between room temperature and 200 DEG C, the dried mouldings crushed and sieved, if required, the sieving fines being returned to the starting mixture, and finally mouldings or the crushed mouldings within a given particle-size range are baked at a temperature above 600 DEG C. The porous material thus produced is intended for use as an adsorbent or absorbent, in particular animal litter. The starting materials are mixed in given proportions and the mouldings or crushed mouldings with a moisture content of 5-25 % are placed in a preheated oven and baked at a given temperature in the range between 750 and 1050 DEG C. The invention also includes subsequently manufactured products. |
