Method and apparatus for treating metal
US4004919A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 1974 |
| Grant date | Jan 25, 1977 |
| Priority date | — |
| Expiry date | Aug 22, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D3/18
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The apparatus disclosed is intended primarily for use in practicing the disclosed method of introducing additives into a molten metal bath contained in a typical ladle or vessel mounted in an upright position with an open mouth at its upper end. The total apparatus includes mechanisms which may be conventional for producing a continuous stream of a fluidized mixture of a carrier gas and solid additive material in particulate form. Various solid additives are introduced into molten pig iron or steel, including aluminum, magnesium, calcium carbide, rare earths, columbium, boron, molybdenum, and many others for such purposes as deoxidizing, desulfurizing, alloying, controlling grain structure, etc. The novel portion of the apparatus includes a discharge tube mounted in upright attitude and extending down into the open mouth of the vessel. The upper inlet end of the tube is flow-connected to the source of the fluidized mixture and the lower discharge end is spaced a selected distance above the bath to eject a free stream of the mixture down toward the bath. The velocity of the stream is so chosen that the energy of the solid particles is sufficient to cause them to penetrate into the b…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.