Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7238222 | Thermal synthesis production of steel A process for producing liquid steel is disclosed. Carbon monoxide and oxygen may be combusted in a high temperature reactor. Iron and iron oxide materials, along with scrap steel if desired, may be placed in the high temperature reactor. Carbon dioxide produced in ... | 07/03/2007 |
| 7227882 | System and method of processing electric arc furnace dust A method of processing electric arc furnace dust includes the steps of preheating a portion of electric arc furnace dust to a temperature of at least 170 degrees centigrade by convection heating to form a preheated dust. The preheated dust is further heated by micro... | 06/05/2007 |
| 6993855 | Method for drying compact containing metal oxide, method for reducing metal oxide, and rotary-hearth-type metal reducing furnace The present invention provides: a method for drying compacts containing water so as not to cause explosion and powdering; a method for reducing the compacts after being dried with great efficiency in a rotary-hearth-type reducing furnace; and a rotary-hearth-type me... | 02/07/2006 |
| 6451085 | Method for producing reduced iron In the production of reduced iron by agglomerating a mixed powder of an iron material and a reducing agent to form compacts like briquettes or pellets, and reducing the compacts in a high temperature atmosphere, when the temperature of reduced compacts is... | 09/17/2002 |
| 6235081 | Process for the production of spongy metal A method for producing a sponge metal from metal ore or iron ore which comprises reacting said metal ore or iron ore in a reduction zone with a CO-- and H2 -containing, reducing feed gas source which has been compressed, and after said reaction... | 05/22/2001 |
| 6083295 | Method of processing finely divided material incorporating metal based constituents Finely divided material, such as flue dust from a steel making furnace, is processed to reclaim constituents. The material in hopper (11) is pelletized. The pellets are dried in a dryer (16) and fed to a first rotary kiln (21) where they are sintered to p... | 07/04/2000 |
| 5906671 | Method for extraction of metals and non-metals from minerals, industrial by-products and waste materials A method for separation and recovery of metals and metal oxides from industrial minerals and waste materials containing zinc, lead, cadmium, arsenic, iron, mercury and selenium. The metals and metal oxides in dust form are mixed with a reducing agent and ... | 05/25/1999 |
| 5782957 | Process for treating iron bearing material A process for treating iron-bearing material with a carbonaceous material to form a dry mixture, wherein the amount of carbonaceous material added exceeds the stoichiometric amount required to reduce the metal oxide to elemental metal. In one embodiment, ... | 07/21/1998 |
| 5437707 | Apparatus for treating iron ore Apparatus for treating iron ore, comprising an elongate and generally cylindrical inclined kiln mounted for rotation about its longitudinal axis. A drive motor is coupled to the kiln to rotate the latter about that axis. A moving grate is positioned at th... | 08/01/1995 |
| 5076838 | Process for direct reduction of materials in a kiln An apparatus for directly reducing pellets of material without melting the material includes the transporting of the pellets through drying and preheating zones on an oxidizing traveling grate and reduction in a ported rotary kiln. There is a kiln having ... | 12/31/1991 |
| 4983214 | Method and apparatus for direct reduction of metal oxides A method and apparatus is disclosed for direct reduction of metal oxides, using a rotary kiln, fed with greenball pellets, the kiln having a feed-end and a discharge end. A first chamber within the kiln, and adjacent to the feed-end, is used for drying, p... | 01/08/1991 |
| 4622905 | Furnacing Discloses an improvement in furnacing objects on the top surface of an impervious rotating hearth in a directly fired rotary hearth furnace by the use of fuel burning with a luminous flame e.g., coal.... | 11/18/1986 |
| 4409022 | Method of producing low-sulfur, reduced, iron ore pellets A method of producing reduced iron wherein pelletized materials are introduced into a furnace together with a reducing agent and a desulfurizing agent, and the pelletized materials are subjected to a reduction treatment. This method includes the step of m... | 10/11/1983 |
| 4266966 | Dust treatment Steelmaking dust is refined by pelletizing the dust and heating the pellets with a reducing agent at a rate sufficient to explode a significant number of pellets.... | 05/12/1981 |
| 4266967 | Process for producing metallized pellets from raw pellets by controlling distribution of temperature in a rotary kiln A process for reducing pellets containing metal oxides, such as chrome oxide, iron oxide, zinc oxide, etc. with the contained carbon to metallized pellets in a rotary kiln, characterized by carrying out the reduction while blowing air or spraying water in... | 05/12/1981 |
| 4247323 | Process of directly reducing iron oxide-containing materials When in the direct reduction of iron-oxide-containing materials in a rotary kiln solid, carbonaceous reducing agents having a high content of volatile constituents are charged to the rotary kiln at its charging end, a reoxidation of the sponge iron can re... | 01/27/1981 |
| 4239530 | Process for producing metallized iron pellets Highly metallized, non-pyrophoric pellets are produced from a finely-divided iron ore concentrate by preparing a moistened mixture of the ore concentrate, a finely-divided carbonaceous material in an amount at least sufficient to reduce all the iron oxide... | 12/16/1980 |
| 4209322 | Method for processing dust-like matter from metallurgical waste gases A method is provided for processing dusts and muds from dust removing systems in the iron and steel industry by pelletizing them for further processing. Green pellets are formed by pelletizing the dusts and/or muds with a moisture content of between 10% a... | 06/24/1980 |
| 4181520 | Process for the direct reduction of iron oxide-containing materials in a rotary kiln Iron oxide-containing materials, such as iron ores, are directly reduced to produce sponge iron by a treatment with solid carbonaceous reducing agents in a rotary kiln at temperatures below the softening and melting point of the charge wherein the kiln at... | 01/01/1980 |
| 4174961 | Method for working-up waste slag from the oxygen steel production A new method is disclosed for recovering elemental iron and manganese present in oxide form in waste slag obtained from oxygen steel production. The metal oxides are reduced in the presence of carbon or carbon combined with a coal mine waste material and ... | 11/20/1979 |
| 4145210 | Process for indurating dried pellets in a rotary kiln Process for indurating dried pellets in a rotary kiln, characterized by charging the dried pellets and coke in the range of from about 2% by weight to about 20% by weight on the weight of the pellets into the rotary kiln, the coke having a size of from ab... | 03/20/1979 |
| 3948638 | Method for the press granulation of industrial dusts separated in dust removal systems A material treating system wherein the material is fed into a reduction furnace or reactor or similar structure whereby portions of the material issue from the furnace in the form of dusts carrying one or more surface reaction products such as oxides, hyd... | 04/06/1976 |
