Inoculation filter
US6793707B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 10, 2002 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Jan 10, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D1/007
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for inoculating molten iron. The method comprises passing the molten iron through a filter assembly at an approach velocity of about 1 to about 60 cm/sec. The filter assembly comprises a filter element and an inoculation pellet in contact with the filter element. The pellet has an inoculant dissolution rate of at least 1 mg/sec. to no more than 320 mg/sec. and comprises about 40-99.9%, by weight, carrier comprising ferrosilicon. The pellet further comprises about 0.1-60%, by weight, at least one inoculating agent selected from a group consisting of cerium, strontium, zirconium, calcium, manganese, barium, bismuth, magnesium, titanium and aluminum or from rare earths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.