The Boc Group, Inc.

Christian Juan Feldermann

Andrew Miller Cameron

Donald P Satchell, Jr

Silvia Beatriz Dougill

A method of refining a ferroalloy includes the step of blowing molecular oxygen or a gas mixture including molecular oxygen into a melt of the ferroalloy. A metallurgically acceptable particulate material is introduced from above into the melt. The particulate material is carried into the melt in a first supersonic gas jet which travels to the melt shrouded by a second gas jet.

Refining ferroalloys

A method of introducing a solid particulate reagent into a bath of metallurgical liquid comprises a step of introducing a solid particulate reagent into a main supersonic gas jet. The main supersonic gas jet is directed at the surface of the bath and is surrounded with a jet of shrouding gas, preferably of a burning hydrocarbon fluid fuel, provided at a supersonic velocity. The main supersonic gas jet is formed at a velocity which is in the range of minus 10% to plus 10% of the velocity at which the jet of shrouding gas is formed, preferably in the range of Mach 2 to 3.

Injection of solids into liquids by means of a shrouded supersonic gas jet

A metallurgical lance for injecting particulate material into a liquid comprises a main gas tubedefining an axial main gas passage terminating at its outlet and in a first Laval nozzledownstream of the throat of said nozzle. A shrouding gas passage in the form of a combustion chambersurrounds the main gas tube and terminates in a second Laval nozzle. A particulate material transport tubedefines a passage for the particulate material to be introduced into the first Laval nozzledownstream of its throat. The first Laval nozzleis provided with a passagefor the flow of coolant.

Lance for injecting particulate material into liquid metal

A nasal cannula for use in administering a gas under pressure through a nasal passage of a user comprises at least one tubular nasal prong assembly. The assembly includes an inner tubular prong having a distal end to be placed in or adjacent the nasal passage and a proximal end for connection to a supply line for the gas, and also includes an outer sleeve extending over at least a portion of the inner tubular prong to define therewith an annular passage in communication with supply line . The arrangement is such that when gas flows through the supply line most will flow out of the distal end of the prong but some will pass through the annular passage to form a shrouding stream.

Nasal cannulae

This invention relates to a burner and a method of combustion for producing a flame jet sheet or sheets for various applications in industrial furnaces. The burner has at least one linear or curvilinear flame nozzle having a ratio of width to height of greater than unity in order to produce high velocity and high temperature flame jet sheet or sheets with a well defined geometry. The burner is capable of being scaled to various sizes for various industrial furnace applications due to its geometry.

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Banyoles, Spain

Christian Juan Feldermann