Pneumatic injection of powder or granule through submerged tuyeres
AssigneeNoranda Inc.
InventorsRaymond Lemay, Robert A. Vos
Life of this patent
Estimating the term…
Abstract
A method of injecting powdered material into converters or other metallurgical vessels equipped with at least one submerged tuyere and a gas flow line interconnecting the tuyere to a bustle pipe or other source for blowing converting gas into the tuyere comprises providing an injection pipe fitted into the tuyere at an acute angle, preferably about 20.degree. C., with respect to the centre line of the tuyere and intersecting the tuyere at a point downstream of the gas line flow line entrance, and introducing fluidized powdered material into the tuyere through such injection pipe.
Claims6
A method of injecting powdered material into converters or other metallurgical vessels equipped with at least one submerged tuyere and a gas flow line interconnecting said tuyere to a bustle pipe or other source for blowing converting gas into the tuyere, the gas flow line comprising a check valve to prevent back flow of the powdered material into the bustle pipe in case of tuyere blockage, said method comprising the steps of:
- a) providing an injection pipe fitted into the tuyere at an acute angle with respect to the centre line of the tuyere and intersecting the tuyere at a point downstream of such gas flow line entrance;
- and
- b) introducing fluidized powdered material into said tuyere through said injection pipe.
A system for injecting powdered material into converters or other metallurgical vessels equipped with at least one submerged tuyere and a gas flow line interconnecting said tuyere to a bustle pipe or other source for blowing converting gas into the tuyere, said system comprising:
- a) an injection pipe at an acute angle with respect to the centre line of the tuyere and intersecting the tuyere at a point downstream of said gas flow line entrance;
- b) a pipeline connected to the injection pipe;
- c) a pneumatic conveying equipment for supplying fluidized powdered material to said pipeline;
- and
- d) a check valve located in the gas flow line from the bustle pipe to prevent back flow of the powdered material into the bustle pipe in case of tuyere blockage.
Dependencies are inferred from the claim text.