Process for the chemical bonding of heavy metals from sludge in the silicate structure of clays and shales and the manufacture of building and construction materials therewith
AssigneeCeramic Bonding, Inc.
InventorsBarrett Johnson, Charles B. Rubenstein
Life of this patent
Estimating the term…
Abstract
The present invention relates to a process for removing contaminants, particularly heavy metal cations from industrial sludge and other industrial materials. The process comprises mixing the industrial wastes with specific fine clay or shale particles to form pellets which are heated at high temperature to form a nonhazardous sintered product. The product is then utilized in the manufacture of bricks, cinder blocks and other building materials and surfaces.
Claims14
A process for removing contaminants from hazardous liquid waste containing heavy metal cations comprising the steps of:
- providing natural clay or shale capable of adsorbing metal cations;
- reducing said clay or shale to finely divided particles with high specific surface area to enhance adsorption of metal cations;
- providing liquid waste having a solid content of less than 1% to 100% solids, said liquid waste containing said heavy metal cations;
- mixing said liquid waste and said clay or shale together in a predetermined concentration of between 1:1 to 40:1 parts clay or shale to liquid waste;
- extruding or pelletizing said mixed materials into nodules;
- drying said mixed material and sintering in a kiln or calciner at a temperature in the range of 1500.degree. Fahrenheit to 2700.degree. Fahrenheit for at least 5 minutes;
- cooling said sintered material;
- and
- incorporating said sintered material in construction materials selected from the group consisting of bricks, cinder blocks, and concrete aggregate.
A process for removing contaminants from hazardous liquid waste containing heavy metal cations comprising the steps of:
- providing clay selected from Montmorillonite and Kaolinite capable of adsorbing metal cations;
- reducing said clay to finely divided particles with high specific surface area to enhance adsorption of metal cations;
- providing liquid waste having a solid content of less than 1% to 100% solids, said liquid waste containing said heavy metal cations;
- mixing said liquid waste and said clay together in a predetermined concentration of between 1:1 to 40:1 parts clay to liquid waste;
- extruding or pelletizing said mixed materials into nodules;
- drying said mixed material and sintering in a kiln or calciner at a temperature in the range of 1500.degree. Fahrenheit to 2700.degree. Fahrenheit for at least 5 minutes;
- cooling said sintered material;
- and
- incorporating said sintered material in construction materials selected from the group consisting of bricks, cinder blocks and concrete aggregate.
Dependencies are inferred from the claim text.