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US 4,071,588 AGranted
Process for production of magnetite spheres with an arc heater
AssigneeWestinghouse Electric Corp.
InventorsMaurice G. Fey, Charles B. Wolf, Paul E. Martin, Francis J. Harvey, II
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Abstract
A process for the production of magnetic spheres from grit of magnetite ore by introducing the grit into an arc heated gas jet, thus heating the grit to a temperature of at least 1600.degree. C, and allowing the melted magnetite droplets to spheroidize and cool to a solid state.
Claims9
A process for producing particulated magnetite spheres by thermal fusion of magnetite ore, comprising:
- a. striking an electric arc in an axial gap between generally hollow, cylindrical electrodes, said electrodes forming a chamber for said arc,
- b. causing the arc to rotate and form a substantially cylindrical arc path between the electrodes,
- c. directing gas through the gap into the arc chamber to thereby form an elongated arc heated gas jet,
- d. introducing particles of magnetite ore having a non-spherical shape with sufficient momentum into the arc heated gas jet to melt the particles to effect spheriodization by formation of droplets by surface tension, and
- e. cooling the droplets to solid state to preserve sphericity.
2 more elements
Dependencies are inferred from the claim text.