Iron-containing refractory balls for retorting oil shale

Details Iron-containing refractory balls for retorting oil shale Iron-containing refractory balls for retorting oil shale

1982-09-30

1983-09-13

Hall, James R.

Plastic and nonmetallic article shaping or treating: processes

Spheroidizing or rounding of solid particles

264 60, 264 85, 264113, 264122, 264131, 264141, 264241, 264345, B01J 200

Patent

active

044041527

ABSTRACT:
Iron-containing refractory balls, in a retorting process for oil shale, permit effective magnetic separation of the balls from the spent shale. These ceramic balls can be made by a process such as admixing powdered alumina and water to form an extrudable mixture, extruding to form cylinders, reshaping cylinders into balls, overcoating with iron particles, further overcoating with alumina, and firing.

REFERENCES:
patent: 2641044 (1953-06-01), Bearer
patent: 3004292 (1961-10-01), Folkins et al.
patent: 3255279 (1966-06-01), Smith
patent: 3593372 (1971-07-01), Driscoll

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