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US 6,744,006 B2Granted
Twin plasma torch apparatus
AssigneeTetronics Limited
InventorsTimothy Paul Johnson, David Edward Deegan, Christopher David Chapman, John Kenneth Williams
Life of this patent
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Abstract
A twin plasma torch assembly includes two plasma torch assemblies supported in a housing. Each of the two plasma torch assemblies has an electrodes. Plasma gas is introduced into a processing zone around the two electrodes. A shroud gas is introduced to surround the plasma. A feed tube is provided to supply feed material to the processor.
Claims27
A twin plasma torch assembly comprising:
- (a) at least two plasma torch assemblies of opposite polarity supported in a housing, said assemblies being spaced apart from one another and comprising
- (i) a first electrode,
- (ii) a second electrode which is or is adapted to be spaced apart from the first electrode by a distance sufficient to achieve a plasma arc therebetween in a processing zone;
- (b) a passage for introducing a plasma gas into the processing zone around each electrode;
- (c) a further passage for introducing shroud gas to surround the plasma gas;
- (d) a feed tube for supplying feed material into the processing zone;
- and
- (e) a power source for generating a plasma arc in the processing zone;
- characterised in that distal ends of first and second electrodes do not project beyond the housing.
6 more elements
Dependencies are inferred from the claim text.