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| Number | Title | Issue Date |
| 6379423 | Device and method for producing sponge iron In a device for producing sponge iron from lumps of iron oxide in a reduction shaft (1), a hot, dust-containing and carbon monoxide-rich reduction gas is used. The reduction gas is generated in a gas generator by partial oxidation of solid carbon-containi... | 04/30/2002 |
| 5443572 | Apparatus and method for submerged injection of a feed composition into a molten metal bath A lance for submerged injection of a feed composition, such as a waste, into a molten metal bath includes a perforate refractory tube which extends substantially coaxially about an injection tube. The perforate refractory tube shields the injection tube f... | 08/22/1995 |
| 5403378 | Method and apparatus for protecting an injection device disposed in a hot blast conduit of a blast furnace To prevent burn-back at a coal dust injection lance which projects into a hot blast conduit of a blast furnace, cooling is effected using atomized coolant. Water is preferred as the coolant. The carrier gas used for the atomized water is either air or the... | 04/04/1995 |
| 5373530 | Melting furnace with gas injection A furnace comprises a space overlying a charge into which space opens at least one oxygenated gas injector passing through the periphery of the furnace to deliver within this space a jet of gas that is nonradial relative to a vertical axis of the space. E... | 12/13/1994 |
| 4887800 | Tuyere of blast furnace A tuyere for a blast furnace comprises water-cooled tuyere; and a burner removably mounted inside the water-cooled tuyere to burning pulverize coal. The burner comprises an inner pipe, an intermediate pipe and an outer pipe which are concentrically arrang... | 12/19/1989 |
| 4699361 | Shaft furnace arrangement for the direct reduction of iron ores There is disclosed a shaft furnace for the direct reduction of iron ores. It includes a gas feed device arranged centrally in the bottom of the shaft furnace in the longitudinal axis of the shaft furnace and having a central cavity. From the cavity, a plu... | 10/13/1987 |
| 4371151 | Blast furnace smelting of zinc A tuyere for a blast furnace, the main body of the tuyere being in the form of a tube with a central bore and the nose portion of the tuyere having a downwardly-inclined hood-like extension of the upper wall of the tube, whereby gas passing through the no... | 02/01/1983 |
| 4344754 | Water cooled vertical gas distributor A vertically disposed gas distributor for injection of combustion air into a shaft kiln. The air distributor extends from the upper portion of the shaft kiln to an intermediate combustion zone, and includes at least one cooling water inlet line and at lea... | 08/17/1982 |
| 4294433 | Pyrometallurgical method and furnace for processing heavy nonferrous metal raw materials A method for processing heavy nonferrous metal raw materials by heating and melting said raw materials in a molten slag with the formation of a heterogeneous melt consisting of a sulfide and an oxide phases. The melt is bubbled oxidized by injecting a gas... | 10/13/1981 |
| 4165979 | Flash smelting in confined space Use of a burner design featuring a tunnel of high length to diameter ratio enables the flash-smelting of sulfides to be carried out in a much more confined space than heretofore possible.... | 08/28/1979 |
