Method and plant for producing hollow microspheres made of glass
AssigneeDennert Poraver GmbH
InventorsKarl Weinberger, Wolfram Neidhardt
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Abstract
A process and a plant produce hollow microspheres made of glass. According to the process an aqueous suspension is prepared from starting materials containing glass powder and water glass, feedstock particles having a diameter between 5 μm and 300 μm, in particular between 5 μm and 100 μm, being produced from the suspension. The feedstock particles are mixed with a pulverulent release agent made of aluminum hydroxide in an intensive mixer. The mixture of feedstock particles and release agent is subsequently introduced into a firing chamber of a furnace. The feedstock particles expand in the firing chamber, at a firing temperature which exceeds the softening temperature of the glass powder, to form the hollow microspheres.
Claims13
A method for producing hollow microspheres made of glass, which comprises the steps of:
- preparing an aqueous suspension of starting substances containing glass powder and water glass;
- producing firing material particles having diameters lying between 5 micrometers and 300 micrometers from the aqueous suspension of starting substances;
- mixing the firing material particles with a powdered release agent made of aluminum hydroxide in an intensive mixer;
- and
- introducing a mixture of the firing material particles and the powdered release agent into a firing chamber of a kiln, the firing material particles expanding to form the hollow microspheres in the firing chamber at a firing temperature which exceeds a softening temperature of the glass powder.
Dependencies are inferred from the claim text.