Method for producing a glass
AssigneeRgs90
InventorsMartin Juul, Erling Fundal
Life of this patent
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Abstract
Glass produced on basis of a raw material in form of a mixture of mainly mineral-containing components comprising sludge from e.g. purification plants and waste products from the industry, and having a determined chemical composition adjusted on basis of knowledge of the chemical composition of the mineral-containing components forming part of the glass. The glass is produced from the raw material which after mineralization is pressed into briquettes that are hardened and subsequently melted in e.g. a blast furnace under oxygen supply, and where the melt is quenched and dried. Large amounts of waste products and waste substances that are normally deposited either treated or untreated can be reused and utilized at production of the glass.
Claims23
A method for producing glass which comprises:
- providing a mixture of mineral-containing components from sewage sludge containing organic material and mineral-containing waste products and optionally including natural rocks;
- thermally decomposing soluble organic material from the mixture to form a thermally treated mixture;
- adjusting the amount of water in the thermally treated mixture to provide a water adjusted mixture having a water content of between 20 and 35 wt %;
- forming briquettes from the water-adjusted mixture;
- and
- melting the briquettes in the presence of oxygen to form a glass that contains more than 30 wt % inorganic components from the sludge.
A method for producing glass which comprises:
- providing a mixture of mineral-containing components from sludge from purification plants or other mineral-containing waste products and optionally including natural rocks;
- thermally decomposing soluble organic material from the mixture to form a thermally treated mixture;
- adjusting the amount of water in the thermally treated mixture to provide a water adjusted mixture having a water content of between 20 and 35 wt %;
- forming briquettes from the water-adjusted mixture;
- and
- melting the briquettes in the presence of oxygen to form a glass that contains more than 30 wt % inorganic components from the sludge;
- quenching the melted glass to form granulates;
- and
- drying the granulates to form glass particles.
Dependencies are inferred from the claim text.