Process using melt accelerator for the conversion of solid waste substances into glass

US4944785A · kind A · utility

Assignees

• Sorg GmbH & Co. KG · DE
• Metallgesellschaft AG · DE

Inventors

• Helmut Sorg · Lohr am Main, DE
• Helmut Pieper · Lohr am Main, DE
• Hartmut Zschocher · Lohr am Main, DE
• Heinz Merlet · Kelkheim, DE

Key dates

• Filing date: Jun 23, 1989
• Grant date: Jul 31, 1990
• Expiry date: Jun 23, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P40/50
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Waste substance such as incineration ash is mixed with cullet and alkaline earth salt to form a mixed batch which is added to a glass melt heated solely by electrodes, producing an exhaust gas which is introduced into the batch thereby cooling the gas to produce condensation products. The alkaline earth salt reacts with alkali in the gas and the condensation products to produce a gall layer of alkali salts and alkaline earth salts which serve as a melt accelerator and are readily removed when accumulated. According to a further step the gas is purified by separating dust therefrom and introducing it into the batch as a slurry.