| Patent Number |
Title Of Patent |
Date Issued |
| 4158367 |
Valve system and improved actuator therefor |
June 19, 1979 |
| A valve actuator, for example a mechanism for imparting motion to a blast furnace evacuation valve, includes a force generator which is coupled to the valve member by a displacement mechanism including a pivotal lever and a pivot arm. The pivotal lever has a pair of angularly related arm |
| 4157816 |
Shaft furnace cooling |
June 12, 1979 |
| Cooling of the wall of a shaft furnace is achieved through the use of a plurality of individual cooling elements, through which a coolant may be circulated, which cooperate to form a lining immediately inwardly of the furnace metal shell. The cooling elements are supported on the shell, |
| 4153140 |
Lubrication technique and apparatus |
May 8, 1979 |
| Lubrication for a rotary shaft positioned within the upper region of a blast furnace is accomplished by mounting a mechanically actuated pump for rotation with a reduction gear box through which the rotatable shaft is driven. The pump is periodically operated by means of an adjustable ca |
| 4152243 |
Treatment of bituminous schists |
May 1, 1979 |
| A process for treating bituminous schists including the steps of crushing the bituminous schist, feeding said schist to the top of a retort, pyrolyzing the crushed schist in said retort as it is moved downwardly therein through a combustion zone into which air is introduced, removing |
| 4151047 |
Feed installation for apparatus for extracting hydrocarbons from bituminous schists |
April 24, 1979 |
| Apparatus for feeding bituminous schist to a series of retorts each equipped with a rotary distribution spout and a central feed channel, the retorts radiating from a central schist distributing tower. At least one hopper communicates with a central feed channel communicating with the |
| 4145033 |
Hot blast stove and method of operation |
March 20, 1979 |
| Intercrystalline stress corrosion of the walls of heat exchangers employed to produce hot air for injection into a blast furnace, particularly the wall of the passage interconnecting the combustion and heat exchange chambers, is avoided by eliminating pressure differentials across the |
| 4144902 |
Isolation valve |
March 20, 1979 |
| A gas generator, for example a blast furnace, is isolated from an exhaust gas treatment system by means of an isolation valve characterized by a valve housing which may be permanently installed in the gas delivery conduit. The housing has a laterally offset recess which receives the |
| 4094494 |
Furnace charge profile measuring process and apparatus |
June 13, 1978 |
| The surface contour of material deposited on the hearth of a furnace is sensed by measuring the height of the material on the furnace axis and at a plurality of points about the periphery of the furnace. The height on the furnace axis is measured with an instrument mounted on the axis of |
| 4074835 |
Furnace charger with discharge channel having approximate oval cross-section |
February 21, 1978 |
| Apparatus including a channel defining member and a movable flow control device cooperating therewith for exercising variable control over the rate of delivery of charge material from a hopper to a furnace is disclosed. The channel defining member approximates an oval shape and the flow |
| 4074816 |
Charge metering apparatus for shaft furnaces |
February 21, 1978 |
| A charge metering system for a shaft furnace is disclosed. The furnace charging apparatus includes means for continuously measuring the charge material in a supply hopper and a metering valve for controlling the material flow rate from the supply hopper. In order to permit accurate c |
| 4071166 |
Blast furnace charging method and apparatus |
January 31, 1978 |
| A method for the controlled delivery of ore charges to a shaft furnace is disclosed. The method employs apparatus including a plurality of sensors on which an intermediate charge storage hopper is supported whereby continuous measurement of charge weight is permitted. The apparatus also |
| 4063722 |
Ejector piston |
December 20, 1977 |
| Leakage of viscous material past an ejector piston, for example the piston of a clay gun employed in plugging blast furnace tapholes, is eliminated by a piston and ring design which exposes in excess of 50% of the leading and inner diameter surfaces of an expandable ring directly to the |
| 4058300 |
Clay gun |
November 15, 1977 |
| The efficiency of operation of a taphole plugging clay gun for a blast furnace is enhanced by facilitating the cleaning of the sealant receiving chamber thereof behind the ejector piston which moves therein. Cleaning is facilitated by providing a protective casing which defines an annula |
| 4040530 |
Shaft furnace feed device |
August 9, 1977 |
| The service life of the components of a bell-less shaft furnace charging installation is enhanced by controlling the trajectory of charge material delivered thereto to obtain an essentially entirely vertical discharge from a discharge funnel through a feed channel to the furnace. Also, |
| 4027605 |
Improved tuyere feed device |
June 7, 1977 |
| A tuyere stock for use in the delivery of heated gas from a source to a furnace and characterized by the provision of a rigid connection between the injection nozzle portion of the stock and the blast tuyere which injects the heated gas to the furnace interior is disclosed. The injection |
| 4023832 |
Apparatus for the transmission of heated fluid |
May 17, 1977 |
| Segmented conduits for transmitting heated fluid, and particularly tuyere feed lines for injecting preheated air into shaft furnaces, have an annular cooling chamber incorporated into the coupling joints between conduit sections. The cooling chambers are positioned inwardly toward the |
| 4023782 |
Tuyere stock and compensator joint therefore |
May 17, 1977 |
| A hermetic expansion joint for use between conduits lined with refractory material and a tuyere stock for blast furnaces utilizing a plurality of such expansion joints. The expansion joints include a bellows coaxial with and connected to the exterior of the conduits to be coupled and, lo |
| 4022573 |
Hot blast stove and method of operation |
May 10, 1977 |
| Intercrystalline stress corrosion of the walls of heat exchangers employed to produce hot air for injection into a blast furnace, particularly the wall of the passage interconnecting the combustion and heat exchange chambers, is avoided by eliminating pressure differentials across the |
| 3997194 |
Compensator connection for tuyere stock |
December 14, 1976 |
| A hermetic expansion joint employing an external bellows and means positioned within the bellows for limiting the relative axial displacements of the conduits being joined in both compression and tension. The expansion joint device has, located within the annular chamber defined by t |
| 3980286 |
Tuyere feed lines |
September 14, 1976 |
| A tuyere stock wherein the blast nozzle, which is the downstream section of the stock, is rigidly coupled to the blast tuyere through which the preheated gas is injected into the furnace. The blast nozzle-blast tuyere assembly and a cooling jacket, which is mounted in the furnace wall ab |
| 3955693 |
Method and apparatus for cooling and cleaning the sealing surface of a valve |
May 11, 1976 |
| 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 |
