Method of making a ceramic article and articles made by the method
AssigneesEsmil B.V., Hoeke Engineering, N.V.
InventorJan H. Van der Velden
Life of this patent
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Abstract
A ceramic article is made by shaping, drying and firing a body shaped from a mixture of clay and an organic fraction. The organic fraction is derived from domestic waste by separation of metal parts, coarse material and material in sheet form. The proportion of clay in the mixture is 40 to 65% by weight and the clay contains more than 10% by weight of particles of size greater than 2.mu..
Claims7
A method of making a ceramic article comprising the steps of preparing a mixture of (a) 40 to 65% (by weight) of clay consisting essentially of aluminum silicate, Fe.sub.2 O.sub.3 and CaO of which more than 10% (by weight of the clay) is a fraction consisting of particles of size greater than 2.sub..mu. and (b) an organic fraction which is obtained from domestic waste after separation therefrom of metal parts, coarse material and material in sheet form, said organic fraction having a screen analysis as follows (% by weight)
- ______________________________________ particle size <4 mm 60-75% particle size 4-6 mm 25-35% particle size 6-30 mm 4-10% particle size >-10 mm absent ______________________________________
- and having a moisture content of 25 to 50% by weight, and being substantially free from glass particles of size greater than 2 mm, shaping said moisture into a body, and drying and firing the shaped body.
Dependencies are inferred from the claim text.