Method for the removal of lead from waste products
US5067978A · kind A · utility
Inventor
Key dates
| Filing date | Aug 17, 1990 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Aug 17, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10J2300/0983
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A process for the removal of lead from a waste product comprising the steps of delivering silica to a combustion chamber, heating the silica within the combustion chamber to a temperature of greater than 1500.degree. F., mixing a lead-containing waste with the heated silica so as to form a leaded glass, and removing the leaded glass from the combustion chamber. The silica material is sand. The process further includes the step of removing oxygen from the chamber prior to the step of heating. The oxygen is removed by injecting an inert gas into the chamber so as to displace oxygen from the chamber. The silica is heated to a temperature suitable for forming molten glass. The remaining constituents of the waste product are heated so as to become diassociated gaseous components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.