Apparatus for producing spheroidal inorganic particulate material
US5253991A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1991 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Sep 4, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/121
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is directed to a spheroidal particulate inorganic material of an inorganic particulate material such as spheroidal cement or slag whose respective particles are of a substantially spheroidal shape and have smooth surfaces having improved flowability and filling properties. The spheroidal particulate material is produced by subjecting the respective particles of the particulate inorganic material to a high temperature flame treatment and rapid cooling in air, or by dispersing fine particles of the inorganic material and an organic or inorganic binder in a non-aqueous solvent to form a slurry and granulating the slurry. Compositions containing the spheroidal particulate inorganic material are used in civil engineering works and construction. To improve energetic efficiency in the production of the spheroidal particulate inorganic material, particularly spheroidal cement or slag, an apparatus is used which is a retention furnace for retaining a molten liquid inorganic material, a nozzle assembly communicated to the retention furnace and capable of scattering therethrough the molten liquid inorganic material, a jet gas for entraining the molten inorganic material …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.