Chemex Gmbh

Ulrich Lanver

Klaus Riemann

Hermann Lieber

Jürgen Hübert

Ulrich Recknagel

Klaus Dieter Riemann

Feeders for use in the foundry industry comprising (a) rice husk ash containing, based on the total amount of the constituents detectable in the rice husk ash by quantitative phase analysis by means of x-ray diffractometry (i) crystalline modifications of silicon dioxide, (ii) monoclinic feldspar and (iii) amorphous silicon dioxide, a total content of at least 70 wt. %, preferably more than 75 wt. % of (i) crystalline modifications of silicon dioxide and (ii) monoclinic feldspar, wherein, based on the total weight of the shapeable composition of the feeder, the amount of this rice husk ash is in the range of from 5 to 50 wt. %, preferably 5 to 25 wt. %, (b) cured binder, (c) optionally fiber material, (d) optionally one or more further fillers, and (e) optionally an oxidizable metal and an oxidizing agent for the oxidizable metal are described.

Feeder and shapeable composition for production thereof

The present invention relates to a core-sheath particle for use as filler for feeder compositions for the production of feeders, comprising

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Langenfeld, Germany

Ulrich Lanver