Size-graded quaternary batch for bonded basic refractory shapes
US3948671A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1974 |
| Grant date | Apr 6, 1976 |
| Priority date | — |
| Expiry date | Jun 17, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A refractory of fused or dead-burned dolomitic grain bonded with fine magnesite. The dolomitic grain is divided into three coarse and intermediate particle size fractions in the batch, while the magnesite is alone in the fine fraction. The four particle fractions are separated by three discrete gaps in the size distribution of particles resulting in a burned refractory of high hot strength and corrosion resistance to furnace slags in basic oxygen furnaces. The width of each gap is at least equivalent to the gap created by removing, from a ground raw material batch with continuous particle size distribution, the raw material retained on one primary Tyler sieve after screening (sizing) the batch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.