Metallurgical apparatus – Means for treating ores or for extracting metals – Amalgam-type extraction means
Patent
1975-07-24
1977-04-26
Dost, Gerald A.
Metallurgical apparatus
Means for treating ores or for extracting metals
Amalgam-type extraction means
266218, F27D 316
Patent
active
040197255
ABSTRACT:
A gas seal and silencer is provided for attachment to a tuyere body to minimize the gas volume and pressure loss during the insertion of a punch bar through a tuyere valve closing the tuyere and so reduce the noise created by the blast of gas leaking out during opening of the tuyere valve. The gas seal and silencer comprises a housing adapted to be secured to the tuyere body with its longitudinal axis substantially in alignment with the longitudinal axis of the tuyere, and closure means mounted within the housing for forming a seal about the punch bar when inserted in the housing. Such closure means may consist of a plurality of closure members mounted for movement toward and away from the punch bar and include means for forcing the closure members against the periphery of the punch bar so as to form a seal between the closure members and the punch bar when the punch bar is inserted in the housing. Such closure members may consist of a plurality of jaws mounted within such housing for radial movement toward and away from the longitudinal axis of the housing and having the ends thereof adapted to contact the punch bar shaped so as to substantially match the periphery of the punch bar. Means are provided for guiding such jaws in their radial movement toward and away from the longitudinal axis of the housing. The ends of the jaws adapted to contact the punch bar are rounded so as to permit the entrance of the punch bar through the jaws even if the punch bar is slightly out of alignment with respect to the longitudinal axis of the housing during insertion of the punch bar through the housing.
REFERENCES:
patent: 123173 (1872-01-01), Holland
patent: 645224 (1900-03-01), Boehling
patent: 1517972 (1924-12-01), Faust
patent: 1689874 (1928-10-01), Jabs
Standard Handbook For Mechanical Engineers McGraw-Hill, 1958, pp. 6-25 to 6-29, Baumeister et al.
Dost Gerald A.
Noranda Mines Limited
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