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| Number | Title | Issue Date |
| 7790099 | Process and apparatus for extracting zinc A process and apparatus for extraction of zinc from a material containing one or more iron oxides and zinc oxide which facilitate heating a composite body of the material and a carbonaceous material in a reduction zone. The reduction zone contains a reducing atmosph... | 09/07/2010 |
| 7618581 | Conditioning system and method for use in the measurement of mercury in gaseous emissions Embodiments of the invention relate generally to systems used to measure mercury in gaseous emissions. In one aspect, the invention is directed to the use of silicon carbide as material for a thermal pyrolysis unit. In another aspect, at least one of silicon nitride... | 11/17/2009 |
| 7381383 | Treating apparatus, treating method and method of treating soil A treatment apparatus of the present invention includes a hermetic door 115b and a retort 115c as an interface for taking out a gaseous emission containing vaporized substances from an object to be treated which is being heated in a reduc... | 06/03/2008 |
| 7232544 | Apparatus for continuous slag treatment of silicon The invention relates to an apparatus for continuous slag treatment of molten silicon for removal of one a more impurity elements from the silicon, the apparatus comprising a vessel (1) intended to contain molten silicon and liquid slag. The vessel (1)... | 06/19/2007 |
| 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 |
| 6866814 | Mercury recovery apparatus Both ends of a bulb of a waste fluorescent lamp are cut off, a phosphor layer formed on an interior surface of the bulb is detached, so that mercury-containing phosphor powder can be obtained. The mercury-containing phosphor powder is subjected to a heating and redu... | 03/15/2005 |
| 6682586 | Assemblies and methods for processing zinc-bearing materials A process for separating and recovering a desired metal as metal oxide from raw material is provided. The process includes placing the raw material and a reductant in a container to form a reducing microclimate within the container. A housing having an ox... | 01/27/2004 |
| 6676889 | Modular furnace emission remediation system A furnace exhaust remediation unit comprises an auxiliary combustion chamber with a gas burner assembly optimized for efficient and substantially complete combustion of pollutants, for example, waxy hydrocarbons emitted as binder/lubricant substances are ... | 01/13/2004 |
| 6468466 | Furnace emission remediation system A furnace exhaust remediation unit comprises an auxiliary combustion chamber with a gas burner assembly optimized for efficient and substantially complete combustion of pollutants, for example, waxy hydrocarbons emitted as binder/lubricant substances are ... | 10/22/2002 |
| 6464928 | Gas regulation system for blast furnace A system for introducing a homogenous mixture of natural gas and oxygen into the tuyeres of a blast furnace. Included in this system are gas conduits with flow controllers connected to a mixer that produces a homogenous mixture. Provisions are made to by-... | 10/15/2002 |
| 6433451 | Method and electric motor with rotational stator An electric composite rotating machine haveing two rotors, capable of developing mechanical power and of runing on two rotational direction at selfadjutable speeds, of differential type, with 40% increase of output, doubling the torque at 30% reduction of... | 08/13/2002 |
| 6416567 | Removal of mercury from waste materials Mercury is efficiently and effectively removed from waste materials by a process and apparatus which heats waste containing mercury to temperatures well above the boiling point of mercury to create a vapor stream laden with mercury vapor. This vapor strea... | 07/09/2002 |
| 6042776 | Apparatus for recovering zinc oxide from dust A method for recovering zinc oxide comprises the steps of: agglomerating a dust; charging the agglomerate to a molten iron in a melting furnace; collecting a dust generated from the melting furnace; recycling a part of the collected dust and recovering an... | 03/28/2000 |
| 5840097 | Method for direct reduction of oxides A method for direct reduction of oxides includes the steps of: providing a reduction zone for direct reduction of oxides and a gas reforming zone communicating with the reduction zone; feeding metal oxides to the reduction zone; feeding a gas mixture comp... | 11/24/1998 |
| 5782188 | Pyrolytic combustion apparatus and method A method and apparatus for incinerating waste material and in particular, for incinerating particulate material resulting from the shredding of vehicles. The particulate material is fed to one end of a rotary drum, and is subjected in the drum to pyroliti... | 07/21/1998 |
| 5607496 | Removal of mercury from a combustion gas stream and apparatus in a hot combustion gas stream are removed therefrom by oxidizing the elemental mercury, to form a mercury compound, and adsorbing the mercury compounds on adsorbent particles such as activated alumina. Oxidation is catalytically promoted. After adsorbing... | 03/04/1997 |
| 5529605 | Method and apparatus for removing mercury from contaminated pipes and installation parts, in particular mercury introduced by natural gas Pipe lines for conducting natural gas become contaminated, over a period of time, by an accumulation of mercury, which occurs in minute amounts in natural gas. If used pipe is scrapped, for example by melting, mercury vapor escaping to the atmosphere pose... | 06/25/1996 |
| 5513834 | Preparation of high purity elements Described is in situ refining high purity elements in Groups IIA and VIB of the Periodic Table in a hermetically sealed apparatus by distilling, condensing and zone refining material within the apparatus.... | 05/07/1996 |
| 5437705 | Device and process for the recovery of cadmium and nickel A process and device for recovering cadmium and nickel metals from Ni-Cd battery and processing scrap material containing nickel, cadmium, iron and other substances are disclosed. The process includes depositing the scrap material in a furnace and adding ... | 08/01/1995 |
| 5431373 | Method and apparatus for increasing the efficiency of a waste heat boiler The invention relates to a waste heat boiler construction provided in succession to a suspension smelting furnace, particularly a flash smelting furnace, in which construction the dust-bearing gases created in the suspension smelting furnace are prevented... | 07/11/1995 |
| 5306472 | Vacuum-suction degassing method and an apparatus therefor A melt is stored in a vessel placed in a decompression vessel. On the bottom of the vessel is arranged a bubble generator made of porous bricks, and bubbles of argon gas are introduced into the melt through this bubble generator. Also a lower half section... | 04/26/1994 |
| 5300137 | Method for removing mercury from contaminated soils and industrial wastes and related apparatus A method and an apparatus for removing mercury from contaminated soils and industrial wastes are provided. The removed mercury may be recovered. A furnace vaporizes the mercury containing portion and the vapors are condensed. In one embodiment, an individ... | 04/05/1994 |
| 5131634 | Sublimer-reactor system with weighing means A sublimer-reactor system for reducing Group IVB metals with magnesium has a sublimer spaced from a reactor with a gas flow control valve in piping interconnecting them. A load cell weighs the feed in the sublimer and outputs a signal to the control valve... | 07/21/1992 |
| 5104096 | Smelting apparatus for making elemental silicon and alloys thereof Smelting apparatus for use in making elemental silicon and alloys thereof is disclosed. The apparatus includes an electrometallurgical furnace having a body which includes a reactor external to the body which includes carbonaceous reductant.... | 04/14/1992 |
| 5035404 | Retort assembly for kroll reductions A retort assembly comprises a retort defining a first chamber for containing zirconium tetrachloride. A crucible having a generally vertical sidewall defines a second chamber for containing magnesium and the reaction products. A vapor passageway extends f... | 07/30/1991 |
| 5031883 | Apparatus for mercury refinement The effluent from mercury collected during the photochemical separation of the 196 Hg isotope is often contaminated with particulate mercurous chloride, Hg2 Cl2. The use of mechanical filtering via thin glass tubes, ultras... | 07/16/1991 |
| 5004496 | Method and apparatus for treatment of dust recovered from off gases in metallurgical processes The method for treating the dust entails the following steps: (a) supplying a combination of dust, a reducing agent and flux to a gastight electrothermic smelting furnace, (b) smelting, reducing and volatilizing certain metals in the smelting furnace, (c) tapp... | 04/02/1991 |
| 4940213 | Exhaust processing apparatus An exhaust processing apparatus comprises a cracking furnace for cracking and solidifying exhaust discharged from a reactor for forming crystals on a semiconductor substrate, a first collecting device for collecting relatively large components solidified ... | 07/10/1990 |
| 4913407 | Precious metal recovery system A precious metal recovery system utilizing an amalgamation process which results in substantially complete recovery both of the precious metal sought and of the mercury utilized in the process. Mercury has undesirable health and environmental characterist... | 04/03/1990 |
| 4883258 | Plasma furnace A plasma furnace including an upper chamber having three electrodes radially spaced from an ore feed tube. The ore is gasified by a plasma arc in a central crucible and allowed to condense in the space between the central crucible and an outer crucible. T... | 11/28/1989 |
| 4861368 | Method for producing iron A method for producing iron in an elongated reaction vessel provided with underbath nozzles and top blowing means in which carbonaceous fuels, iron ore and/or prereduced ore are fed to the melt and in which the reaction gases escaping from the melt are af... | 08/29/1989 |
| 4797524 | Apparatus and method for regenerating active carbon The invention relates to an apparatus for the regeneration of active carbon comprising particularly: a hopper for introducing the active carbon; a reactor (7) delimited by an elongated shaped sheath; a continuous Archimedes screw (10) situated inside the reactor to... | 01/10/1989 |
| 4571259 | Apparatus and process for reduction of metal oxides An apparatus and process for the reduction in a plasma stream of a feed material including a comminuted metal oxide, a slag former and a reductant utilizing an enclosed horizontal reactor having a reduction chamber and a filter chamber therein separated b... | 02/18/1986 |
| 4502871 | Apparatus and method for separating wax from an entrainer gas Disclosed is a wax condenser for separating wax from an entrainer gas (or sweep gas) which is introduced into a sintering furnace and then pumped out in order to remove the wax from the furnace. The condenser includes a hot chamber and a cold chamber. Wax... | 03/05/1985 |
| 4488905 | Method of recovering volatile metals from material containing metal oxides A method of reducing and recovering volatile metal from metal oxides comprising the steps of injecting metal oxide-containing material into a shaft reactor, simultaneously injecting reducing agent into said reactor, continuously maintaining said reactor s... | 12/18/1984 |
| 4407488 | Distillation and sublimation apparatus comprising a condenser The invention relates to a distillation and sublimation apparatus having a receiving vessel and a number of containers for the starting product. Each container has a bottom, an outer wall and an inner wall with a vapor duct, and the containers are stacked... | 10/04/1983 |
| 4344793 | Mercury removal process and apparatus Disclosed herein is an apparatus and process for recovering mercury from a sludge which is discharged, for example, from a mercury-cell process for producing chlorine. In accordance with the invention the sludge is applied to a filter which washes away sa... | 08/17/1982 |
| 4226406 | Apparatus for the complex continuous processing of polymetallic raw materials An apparatus for processing complex metallic materials, such as, copper-zinc or copper-lead-zinc concentrates and also slag-containing zinc and lead, by melting these materials in an atmosphere of gas containing free oxygen, and reducing the resulting mel... | 10/07/1980 |
| 4139181 | Apparatus for preparing metallic magnesium Metallic magnesium is prepared by reducing magnesium oxide with carbon and condensing metallic magnesium by ejecting a coolant gas from a nozzle having small hole to an outlet opening for discharging the mixed gas of the coolant gas, carbon monoxide and m... | 02/13/1979 |
| 4059438 | Process for the work-up of a contaminated inactive mercury(II)chloride/active carbon-catalyst Contaminated inactive mercury(II)chloride/active carbon-catalysts are worked-up. To this end the invention provides for the active carbon to be burnt with the quantity of air or oxygen or mixtures thereof necessary to produce combustion gases containing m... | 11/22/1977 |
