Filter medium for molten metals
US5998322A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Aug 18, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/1015
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Herein disclosed is a filter medium for molten metals which consists of a sintered body of a mixture comprising 100 parts by weight of at least one refractory grain selected from the group consisting of alumina particles and Al.sub.2 O.sub.3.MgO spinel crystal particles; and 5 to 25 parts by weight of an inorganic binder which comprises 60 to 90% by weight of Al.sub.2 O.sub.3.MgO spinel crystal powder, 5 to 12% by weight of B.sub.2 O.sub.3, and not more than 30% by weight of at least one oxide selected from the group consisting of Al.sub.2 O.sub.3, MgO and TiO.sub.2. The filter medium is used for filtering off solid impurities mixed in molten metals, in particular, molten aluminums.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.