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| Number | Title | Issue Date |
| 6948887 | Transport container having compartments that can be individually pressurized A container for use in transporting particulate materials includes a plurality of product compartments, with each such compartment having a material outlet in communication therewith through which particulate material in the compartment may be discharged. The contai... | 09/27/2005 |
| 6245122 | Apparatus and method for reclaiming scrap metal An apparatus and method for reclaiming contaminated scrap metal, more particularly an improved reverberatory furnace designed for melting scrap. The amount of hydrocarbons volatilized from the melting of contaminated scrap is measured and the fumes are pa... | 06/12/2001 |
| 6039916 | Apparatus for producing direct reduced iron with a controlled amount of carbon Method and apparatus for the production of prereduced iron ore, Direct Reduced Iron (DRI), or the like, in an ironmaking plant wherein the reducing gas utilized in the chemical reduction of iron oxides is generated from natural gas within the reduction re... | 03/21/2000 |
| 5225142 | Method and apparatus for the automatic monitoring of operating safety and for controlling the progress of the process in a vacuum heat-treatment oven In a vacuum heat treating oven operating with hydrogen under pressure as the cooling medium, especially for the quenching of greatly heated metal workpieces (5), a method is provided for the automatic control of the progress of the process and for monitor... | 07/06/1993 |
| 4953832 | Apparatus for the controlled cooling of hot rolled steel samples A method and apparatus for cooling samples of hot rolled steel sections. A programmable controller directs a predetermined sequence of air and cooling water sprays against the sample while held in a closed container. The controlled cooling of the sample p... | 09/04/1990 |
| 4835701 | Post-mix method and system for supply of powderized materials A powderized material supply system comprises a plurality of reservoir tanks, each containing a different type of powder, and is associated with a metering means for metering the material into an individual supply line. Each individual supply line is asso... | 05/30/1989 |
| 4752329 | Apparatus and method for increasing carbon content of hot directly reduced iron A method of producing a hot, carburized metallized iron product in a generally vertical shaft furnace having an upper reducing zone in which iron oxide reacts with a gaseous reductant, and a lower carbon control and product discharge zone, including: esta... | 06/21/1988 |
| 4723763 | Device for continuous injection under low pressure of a powdered additive into a stream of molten metal The invention relates to a device for continuous injection under low pressure of a powdered additive into a stream of molten metal. It comprises, in succession from top to bottom: a top compartment 5 for the admission of the molten metal, a treatment chamber 7 conn... | 02/09/1988 |
| 4707183 | Method of operating a blast furnace with plasma heating A blast furnace, especially for the production of hot metal for the steel industry and operated with a normal charge above the tuyere blast zone, has its hot metal production increased at least temporarily by a lateral injection of metal oxides into the z... | 11/17/1987 |
| 4702766 | Method of increasing carbon content of direct reduced iron and apparatus A method of producing a hot, carburized metallized iron product in a generally vertical shaft furnace having an upper reducing zone in which iron oxide reacts with a gaseous reductant, and a lower carbon control and product discharge zone, including: esta... | 10/27/1987 |
| 4676826 | Method and apparatus for pneumatic feeding or additives into converters A method and apparatus for pneumatic feeding of additives along pipes from an additive silo to converters. The additive is allowed to flow into a dispatching device, a scale or a similar device in it stopping the entrance of the additive when the desired ... | 06/30/1987 |
| 4643402 | System for producing a regulated atmosphere for a high-temperature process The invention provides a method and apparatus for producing a regulated atmosphere in a heat treating furnace. In the preferred embodiment, liquid methanol is heated sufficiently to cause it to dissociate into hydrogen and carbon monoxide, i.e. the combus... | 02/17/1987 |
| 4378244 | System for coal injection in iron oxide reducing kilns A method and means for improved control of the process for directly reducing materials containing iron oxides in a rotary kiln using a solid carbonaceous reducing agent, such as coal, introduced from the charge feed and discharge ends of the kiln, as the ... | 03/29/1983 |
| 4358092 | Exothermic reaction, system for supplying a reactant gas and a shielding fluid to a reactor, and control signal generating circuit for use in said system An exothermic reactor has a refractory lining and a plurality of annular nozzles mounted in said lining. Each nozzle has an inner reactant gas passage and an annular shielding fluid passage surrounding said reactant gas passage. A reactant gas is supplied... | 11/09/1982 |
| 4286774 | System for automatically injecting a measured quantity of powdered reagent into a pool of molten metal A system for automatically controlling the injection of powdered reagent into a pool of molten metal through a generally vertically disposed movable tubular lance includes lance manipulating means for imparting movement to the lance, convey gas control me... | 09/01/1981 |
| 4279406 | Plant for generating an atmosphere for the heat treatment of metals This invention relates to the generation of an atmosphere for the heat treatment of metals, incorporating an alcohol of the methanol type that decomposes by cracking. A generating plant comprises a nitrogen circuit connected to a pressure source, an alcoh... | 07/21/1981 |
| 4232852 | Apparatus for control of the carburization of parts in a vacuum furnace An apparatus for the control of the carburizing of parts under vacuum in a acuum furnace, with which as a carbon carrier a hydrocarbon gas is introduced controlled in the furnace. A detector detects the occurrence of a soot mist formation. Upon the occurre... | 11/11/1980 |
| 4127257 | Process for operating a plurality of regenerative hot blast stoves for supplying hot blast to a blast furnace A plurality of regenerative hot blast stoves are operated under a staggered-parallel process wherein each stove is alternately operated under a fixed heating cycle wherein no cold blast is supplied to the stove and no hot blast issues therefrom and a fixe... | 11/28/1978 |
| 4073628 | Control system for apparatus to gasify fine-grain fuels in a reactor Fine-grain fuel is delivered from pressure vessels with a vehicle gas as a fluidized flow into a reactor for gasification at an elevated pressure. A gaseous gasification agent is also fed into the reactor. A control system for the fine-grain fuel and gasi... | 02/14/1978 |
| 4054444 | Method for controlling the carbon content of directly reduced iron This invention relates to a method for controlling the carbon content of metallized iron pellets produced by the continuous direct reduction of iron oxide in a vertical shaft furnace with a reducing gas having a high hydrogen and carbon monoxide content. ... | 10/18/1977 |
| 4050681 | Apparatus for the controlled feeding of a refining gas and of a fluid protective medium An improved apparatus for supplying the refining gas and protective media utilized in the refining process described in U.S. Pat. No. 3,706,549 issued Dec. 19, 1972, including valves provided in the supply lines for preventing malfunctioning of the proces... | 09/27/1977 |
| 4049394 | Control system for a coal gasification plant A control system maintains a predetermined volumetric ratio between fine-particle fuel and a gasification agent which are fed separately into a reactor wherein the fuel is gasified under pressure. The control system includes a first measuring means respon... | 09/20/1977 |
| 4034969 | Oxidation roasting of ore The roasting temperature of ore, such as sulfide concentrate, is controlled by feeding water and air under pressure to at least one spray nozzle located relative to a roasting zone containing the ore, means being employed for selectively varying the ratio... | 07/12/1977 |
