Electric arc oven for treating molten metals with a gas and a process therefor
US5067693A · kind A · utility
Inventors
Key dates
| Filing date | Mar 13, 1990 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Mar 13, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Electric arc oven for melting scrap iron of the type comprising a vat lined with an inner coating made of refractory material which is called the sole of the oven, lateral walls, a vault capping the upper opening of the vat, openings provided in the vault through which the electrodes extend, and a tapping nozzle or eccentric tapping hole. In this oven, the sole is provided with at least one device for injecting gas to stir the molten metal. The injection device includes a low injector formed of a compact block made of dense non-porous refractory material through which extend one or a plurality of, preferably less than 50, hollow metallic tubes or slits or channels along its entire height in the direction of gaseous blowing and permitting gas to pass therethrough. The low injector is surmounted by a body of porous rammed earth whose initial thickness is 50 to 300 mm, is composed of unshaped refractory material in the form of granular particles having a diameter of at least 10 mmg, and the granulometry of the porous rammed earth has a permeability between 100 and 300 Namoperm after fritting under heat. A process of melting scrap iron using this oven is also disclosed. The gas is sent…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.