Inorganic porous body and method for producing the same
AssigneeAisin Takaoka Co., Ltd.
InventorHayato Kato
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Abstract
This invention aims to provide an inorganic porous body which can be ensured with high strength and high porosity and which is applicable to soil conditioners. The inorganic porous body has a pellet-shape having pores, includes 50% and more silica by weight, and 20% and more alumina by weight. Also, the inorganic porous body has a porosity of 40% and more by volume. The sludge, which discharged from casting foundries as sludge-wastes and which has an ignition loss of 20%, is utilized as a starting material. The starting material is mixed with water to make a mixture, the mixture is formed to become pellets, and the pellets are burned.
Claims26
A method for producing an inorganic porous body,
- using a starting material which has an ignition loss of 20% or more by weight comprising sludge as a main constituent, said sludge including silica and alumina discharged from a casting foundry as sludge-wastes, comprising the steps of:
- forming a pellet-shaped body or a lump-shaped body from a mixture obtained by mixing said starting material with water, and
- heating said pellet-shaped body or said lump-shaped body at a temperature of at least 800.degree. C. to burn said pellet-shaped body or said lump-shaped body so as to obtain said inorganic porous body.
A method for producing an inorganic porous body,
- using a starting material which has an ignition loss of 10% or more by weight comprising dust as a main constituent, said dust including silica and alumina discharged from a casting foundry as dust-wastes,
- comprising the steps of:
- mixing said starting material with water to make a mixture by means of a stirring wing, thereby forming a pellet-shaped body having a non-cylindrical shape, and
- heating said pellet-shaped body at a temperature of at least 800.degree. C. to burn said pellet-shaped body so as to obtain said inorganic porous body.
Dependencies are inferred from the claim text.