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US 5,314,171 AGranted
Apparatus for the extraction of metals from metal-containing raw materials
AssigneeOsaka Fuji Corporation
InventorsHans A. Friedrichs, Leonid W. Ronkow
Life of this patent
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Abstract
Metal-containing ores are extracted by a process and apparatus which avoid contaminating the product with fuel gas components. In a rotary kiln, a heat shock-resistant ceramic pipe is subjected to indirect high temperature heating, thereby allowing the extraction reaction to be conducted without heat producing fuel gases.
Claims15
An apparatus for extracting metals from raw materials comprising:
- (a) a temperature shock-resistant ceramic pipe, said pipe being capable of withstanding a temperature change of between about 1100.degree. C. and room temperature within about 5 seconds without failure;
- (b) means for rotating said pipe;
- and
- (c) an external heat source for heating said pipe.
1 more element
An apparatus for extracting metals from raw materials comprising:
- (a) a temperature shock-resistant ceramic pipe, said pipe being capable of withstanding a temperature change of between about 1100.degree. C. and room temperature with about 3 seconds;
- the wall of said ceramic pipe having a multilayered construction, each of said layers having a thickness of between 0.05 and 0.2 mm and said wall having a total thickness of between about 8 and 12 mm, said layers being individually produced by a plasma-spraying process and each layer having fine, homogeneously distributed pores with an average diameter of between about 10 and 1000 nm, and said pipe including an internal reaction space free of heat sources;
- (b) means for rotating said pipe;
- and
- (c) an external heat source for heating said pipe.
2 more elements
Dependencies are inferred from the claim text.