Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7678326 | Method and apparatus for manufacturing fine particles An apparatus for manufacturing fine particles includes a reactor; a first inlet part including at least one port introducing a reactive gas flow containing a fine particle source material; a second inlet part including at least one port introducing a diluting gas fl... | 03/16/2010 |
| 7232542 | Preheating cold blast air of a blast furnace for tempering the hot blast temperature An improved blast furnace system for producing molten iron incorporating a preheater to heat the cold blast air used to temper the hot blast temperature is disclosed. The improved blast furnace system comprises a blast furnace, a hot blast main for conveying a suppl... | 06/19/2007 |
| 7175690 | Pre-treatment process for feed material for direct reduction process A pretreatment process for solid lump feed material for a gas and pellet/lump-based direct reduction process, comprising preheating feed material to a temperature of from about 200 C to about 500 C, without reduction, in a non-reducing atmosphere prior to charging t... | 02/13/2007 |
| 5474280 | Apparatus for preheating a reactor feed A method and apparatus for preheating a reactor feed, comprised of an iron ore (10) and a process gas (21), in an iron carbide process for making steel is provided. The apparatus comprises a process gas preheater (40) having a furnace (56) and a heat exch... | 12/12/1995 |
| 5437708 | Iron carbide production in shaft furnace A method and apparatus for the production of iron carbide in a shaft furnace, by reacting a carbon containing reducing gas as the process gas with particulate metal oxide material for an extended residence time at low temperature.... | 08/01/1995 |
| 4842256 | Apparatus for melting metal A process for melting metal in a shaft furnace operated without coke using a liquid or gaseous fuel, whose combustion products initially heat the molten metal which has collected below the furnace hearth (2) in furnace shaft (1) to the desired tapping tem... | 06/27/1989 |
| 4691899 | Apparatus for reactor iron making An improved apparatus for reactor iron making has a furnace body to melt raw material, typically as scrap, a shaft to heat the raw material, and a raw material supply bucket, these three components being arranged vertically, with an exhaust gas combustion... | 09/08/1987 |
| 4612042 | Method for automatically fluxing and casting samples A method of fluxing an oxide sample includes placing the sample in a crucible which has a central axis and a bottom, and heating the crucible and thus the oxide sample. A motion is applied to the crucible whereby the central axis moves to describe a conic... | 09/16/1986 |
| 4556418 | Process for melting a ferrous burden A process for melting a ferrous burden comprising scrap iron, scrap steel, pig iron, direct reduced iron or mixtures thereof without the use of coke is provided. Air or enriched air as a primary oxidant is preheated and together with fuel is combusted to ... | 12/03/1985 |
| 4462792 | Reheating metal bodies with recovered blast-furnace energy Metal bodies such as billets and blooms are reheated for rolling in a metal-refining operation having a blast furnace by first heating the top gas of the blast furnace to at least 800° C. by means of a plasma torch, then, before the gas has cooled apprec... | 07/31/1984 |
| 4457494 | Metal melting furnace A refractory lined melting furnace particularly suited for separation of non-ferrous metals with embedded or attached ferrous components, includes a casing or body pivotally mounted and tiltable by means of fluid operators. The interior is divided by two ... | 07/03/1984 |
| 4370162 | Method for the gaseous reduction of iron ore to sponge iron Process and apparatus for the gaseous direct reduction of iron ores wherein at least a portion of the spent reducing gas effluent from a reduction reactor is upgraded and thereafter heated and recycled to said reactor forming a reducing gas loop and make-... | 01/25/1983 |
| 4363655 | Method for operating blast furnace A method for operating a blast furnace, characterized by: adding a prescribed volume of blast furnace gas to an air for blast fed to a hot stove; oxidizing, in the hot stove, CO contained in the blast furnace gas into CO2 and H2 cont... | 12/14/1982 |
| 4362554 | Method and apparatus for manufacturing sponge iron Disclosed are a method and apparatus for manufacturing sponge iron by the continuous reduction of iron oxides in a shaft utilizing recirculation gases. Reaction gas is removed from the shaft furnace, substantially cleaned of all CO2 and H2... | 12/07/1982 |
| 4362555 | Method and apparatus for manufacturing sponge iron Disclosed are a method and apparatus for manufacturing sponge iron by the continuous reduction of iron oxides in a shaft utilizing recirculation gases. Reaction gas is removed from the shaft furnace, substantially cleaned of all CO2 and H2... | 12/07/1982 |
| 4354669 | Apparatus for regulating the quantities and percentages of the gaseous constituents of oxygen, nitrogen, carbon dioxide and water in reaction processes in metallurgical applications An apparatus is provided for regulating the percentage quantities of individual gases present in the combustion air supplied for reaction processes in metallurgy. A molecular sieve absorption material is used on the intake air to absorb the inert constitu... | 10/19/1982 |
| 4284419 | Declogging process for filtration installation and improved filtration installation The invention relates to an apparatus and a declogging process for filtration installation for dust-laden gases presenting reducing properties, consisting in taking dust-free gas at the outlet of the filtration installation, oxidizing this gas and using t... | 08/18/1981 |
| 4175951 | Method and apparatus for preparing a reducing gas stream A method and apparatus for preparing a hot reducing gas for introduction into a vessel containing ore oxide in order to react with the ore oxide to produce reduced metal including the steps of combusting a fuel with no more than a stoichiometric amount of... | 11/27/1979 |
| 4102674 | Method for hardening iron ore pellets Iron ore pellets on a grid in a treatment chamber are hardened by contact with a heat treated, low calorific gas. The gas is generated in the gasification chamber of a slag bath generator. The generator receives a gasification agent and solid fuel that pr... | 07/25/1978 |
