Size-graded ternary batch for bonded basic refractory shapes
US3940279A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1974 |
| Grant date | Feb 24, 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 one coarse and one intermediate particle size fraction in the batch, while the magnesite is alone in the fine fraction. The fine, intermediate and coarse fractions are separated by large discrete gaps in the size distribution of particles resulting in a burned refractory of high hot strength and corrosion resistance to slags in basic oxygen furnaces. The width of each large gap in the particle size distribution is at least equivalent to the gap created by removing from a ground raw material batch, with a continuous particle size distribution, the particles retained on at least three consecutive primary Tyler sieves after screening (sizing) the batch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.