Magnesium-containing treatment agents
US4173466A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1977 |
| Grant date | Nov 6, 1979 |
| Priority date | — |
| Expiry date | Dec 6, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21C1/105
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Treatment agents are described for use in nodularizing cast iron in the production of ductile iron and also useful in deoxidizing steel and desulphurizing cast iron. The agents take the form of a compacted mixture comprising particulate iron, magnesium and calcium, and are distinguished by PA1 (a) a magnesium content of 5 to 15% by weight PA1 (b) a weight ratio of magnesium to calcium in the range of from 1:1 to 8:1 PA1 (c) the iron having a purity of at least 95% by weight and a particle size of all less than 0.5 mm and PA1 (d) being compacted into a body of density at least 4.3 gm/cm.sup.3. The high density allows the agent to be used effectively by a simple overpour technique.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.