TUYERE FOR BOTTOM GAS METAL PURGING IN LADLE AND MANUFACTURING METHOD THEREOF Russian patent published in 2009 - IPC B22D41/58 

FIELD: metallurgy industry.

SUBSTANCE: tuyere consists of metal sleeve with a bottom, which is filled with refractory concrete mass, in which around longitudinal axis there made are through gas-supplying slot channels, and wear indicator located in lower part of metal sleeve. Slot channels are spiral and are surrounded with eyes of distance rings. Tuyere manufacturing method involves manufacture of cone sleeve with a bottom and gas-supplying tube, installation of channel-forming strips into slots of the consumable pattern, installation of pattern with strips in bottom part on pins welded to the cone sleeve bottom, installation of wear indicator into consumable pattern and its attachment by means of a clamp to pins for the pattern, attachment of upper ends of channel-forming strips by means of a fixture put on upper part of cone sleeve, sandwiching and vibration compaction of refractory concrete mass with further thermal treatment. Before consumable pattern is installed in the sleeve, upper ends of channel-forming strips are passed through eyes of distance rings, crimped for fixing the rings position. After the pattern is installed and fixed in the sleeve, upper ends of strips are turned in circumferential direction relative to vertical sleeve axis till the strips are located spirally.

EFFECT: improving operating reliability of tuyere at spiral location of through slot-type channels.

2 cl, 5 dwg, 2 ex