Waste incineration residues and the products obtained
US5416252A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1992 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Dec 28, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention concerns a process for the treatment of incineration residues of urban or industrial wastes comprising the following steps; a first step of chemical analysis of the incineration residues of urban or industrial wastes in order to determine: PA1 their water-soluble sulfate content, PA1 the overall retarding or accelerating action of the water-soluble ions which are liable to hinder the setting or hardening of a Portland cement, a second step in which the urban or industrial waste incineration residues are mixed or crushed, with a hydraulic binder and additives, followed by granulation with water of the mixture obtained with the granules then left to harden, the nature and proportion of said hydraulic binder and said additives having been selected in order to allow both the physical and/or chemical neutralization of the harmful elements for setting or hardening of a Portland cement present in the wastes, as well as the production of granules with low porosity and low permeability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.