Search Patents
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Patent number: 4437796Abstract: A pulverized combustible material or ore is transported from a storage container, at atmospheric pressure, to the interior of a pressurized shaft furnace via three intermediate receptacles. The material is weighed in the first receptacle, pneumatically transported to the second receptacle, the second receptacle pressurized and the material transmitted under pressure to the third receptacle which is maintained at a pressure which is higher than the furnace pressure.Type: GrantFiled: June 11, 1980Date of Patent: March 20, 1984Assignee: Paul Wurth S.A.Inventors: Leon Ulveling, Edouard Legille, Jean Boever
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Patent number: 4493600Abstract: The movements of an oscillatory member, for example the charge distribution spout of a furnace charging system, are caused to follow the movements of a remotely located control device which may be in the form of an elongated arm. The spout and arm are rotatable about respective pairs of orthogonal axes and any angular deviations between the orientation of the control device arm and spout axis are sensed. Control signals commensurate with the angular deviations are delivered to fluidic actuators which reposition the spout.Type: GrantFiled: April 14, 1982Date of Patent: January 15, 1985Assignee: Paul Wurth S.A.Inventors: Edouard Legille, Pierre Mailliet
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Patent number: 4162784Abstract: The pressurization and depressurization of a container, and specifically a feed hopper for materials to be delivered to the interior of a blast furnace, is accomplished with the aid of pressure equalization devices which each include a valve and a wear and sound reducing mechanism immediately downstream of the valve. The wear and sound reduction mechanism subdivides the stream of gas, which may contain entrained particulate matter, into a plurality of jets which are caused to follow a zig-zag trajectory.Type: GrantFiled: February 18, 1977Date of Patent: July 31, 1979Assignee: S.A. des Anciens Etablissements Paul WurthInventors: Edouard Legille, Rene N. Mahr, Carlo Heinz
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Patent number: 3955693Abstract: A method of and apparatus for cooling and cleaning the sealing surfaces of the sealing valves of a material storage hopper which are subjected to the high temperature and pressure within a shaft furnace. The method comprises introducing a cooling medium into the charging installation of the furnace and causing the coolant to continuously impinge upon the sealing valves. The apparatus includes a rotatable sealing flap having a sealing surface of resilient material and a cooling fluid supply conduit for directing a flow of cooling fluid towards the sealing surface of the flap when the flap is in its opened position.Type: GrantFiled: June 26, 1974Date of Patent: May 11, 1976Assignee: S.A. des Anciens Etablissements Paul WurthInventors: Edouard Legille, Rene N. Mahr
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Patent number: 4307987Abstract: The profile of material deposited on the hearth of a pressurized furnace is controlled by means of a charging installation including a lower charging bell which has, suspended therefrom, a variable geometry distributor which may be controlled to select the point of deposition of material delivered to the furnace. The charging bell cooperates with an intermediate storage hopper, positioned within a hermetically sealable casing, whereby the hopper may be alternately filled with material and emptied by permitting the material to fall onto the distributor via an annular opening defined when the bell is lowered.Type: GrantFiled: July 13, 1979Date of Patent: December 29, 1981Assignee: Paul Wurth S.A.Inventors: Edouard Legille, Pierre Mailliet, Rene Mahr, Pierre Mailliet
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Patent number: 4547116Abstract: The position of the discharge end of a tubular member, supported from its first end so as to be rotatable about a first axis and pivotal about a second axis which intersects and is transverse to the first axis, is controlled from a remote location. The controllable tubular member may be the distribution spout of a shaft furnace charging installation which is mounted between the branches of a suspension fork which is rotatable about its own longitudinal axis. A motion transmission mechanism extends through the suspension fork and, in cooperation with the movements of the fork itself, transmits the movements imparted to a control device, which is caused to undergo precisely the same movements as it is desired to have the spout perform, to the spout.Type: GrantFiled: November 26, 1984Date of Patent: October 15, 1985Assignee: Paul Wurth, S.A.Inventors: Edouard Legille, Pierre Mailliet
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Patent number: 4525120Abstract: The position of the discharge end of a tubular member, supported from its first end so as to be rotatable about a first axis and pivotal about a second axis which intersects and is transverse to the first axis, is controlled from a remote location. The controllable tubular member may be the distribution spout of a shaft furnace charging installation which is mounted between the branches of a suspension fork which is rotatable about its own longitudinal axis. A motion transmission mechanism extends through the suspension fork and, in cooperation with the movements of the fork itself, transmits the movements imparted to a control device, which is caused to undergo precisely the same movements as it is desired to have the spout perform, to the spout.Type: GrantFiled: July 31, 1981Date of Patent: June 25, 1985Assignee: Paul Wurth S.A.Inventors: Edouard Legille, Pierre Mailliet