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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 6288001 | Graphite-containing monolithic refractory material A graphite-containing monolithic refractory material comprises at least one component selected from alumina and alumina-magnesia spinel, which are divided into selected particle size regions, artificial graphite having a selected average particle size, an... | 09/11/2001 |
| 5314599 | Barrier layer against fluoride diffusion in linings of aluminum reduction cells A barrier layer for prevention of solid fluorides penetration, e.g. NaF, from the interior of an aluminum production cell holding a fluoride-containing melt into a refractory layer intended to provide heat and electrical insulation for the cell. The barri... | 05/24/1994 |
| 5018710 | Method and devices for removing alumina and other inclusions from steel contained in tundishes Molten steel in tundishes can be contacted with high surface area ceramic shapes which remove the alumina and other impurities contained in steel. Certain ceramic shapes, in particular tundish baffles, having a large surface area which acts as alumina tra... | 05/28/1991 |
| 4703022 | Alumina and MgO preheatable insulating refractory liners and methods of use thereof Novel preheatable molded refractory insulating liners and methods of use thereof for lining metallurgical vessels, such as hot tops, ladels, tundishes, troughs and pipes, etc., which serve to transfer molten metals, such as ferrous alloys, are disclosed. ... | 10/27/1987 |
| 4570910 | Method of constructing a steelmaking ladle A ladle or other vessel for containing molten metal, for example molten steel, is lined with refractory at least some of which (e.g. in the slag line area) is unfired refractory bonded with a phosphate bond such as a long-chain glassy polyphosphate and co... | 02/18/1986 |
| 4555094 | Process for the repair of slide plates The invention relates to a method for repairing slide plates of metallurgical containers. These types of slide plates consist of refractory material and have a passage opening for the discharge of the liquid metal, which is usually steel. Owing to corrosi... | 11/26/1985 |
| 4545568 | Unfired refractory structural member in the form of a plate for use as an expendable lining of metallurgical vessels Unfired refractory structural member in the form of a plate for the expendable lining of metallurgical vessels, especially for tundishes used in continuous steel casting, and comprising magnesia sinter and possibly olivine with a grading of 30-45% by weig... | 10/08/1985 |
| 4497473 | Composite refractory articles and method of manufacturing them A method of manufacturing a composite refractory article having a flow passage through which a molten metal stream may be conducted and comprising a first body of refractory material which defines a surface of that passage, the first body being bonded to ... | 02/05/1985 |
| 4379691 | Olivine bedding material for soaking pits A method of operating "wet bottom" practice soaking pits to prolong useful period between bed replacement. Olivine is used to replace coke breeze in the bottom of the soaking pit to protect its refractory lining. Operating periods from 40-60 days are possible ... | 04/12/1983 |
| 4277539 | Refractory articles and composite metal-ceramic articles (cermets) prepared from a silicate-containing aluminum titanate Refractory products such as foundry articles and composite metal-ceramic articles are prepared from a sepiolite (2 MgO.3SiO2.2H.sub.2 O) and silicate containing aluminum titanate.... | 07/07/1981 |
| 4272062 | Blast furnace hearth A blast furnace hearth, or at least its internal surface layer, is built of carbon bricks whose pores have been reduced in size by an Si--N--O composition formed in them.... | 06/09/1981 |
| 4115133 | Unburnt refractory masses or bricks for metallurgical vessels based on chrome-ore and carbon-containing binder An unburnt refractory mass, which can be in the form of a brick, for use in vessels employed in metallurgical refining consisting essentially of chromium-ore, sintered magnesia and a carbon-containing binder, said mass consisting essentially of: 75 to 95%... | 09/19/1978 |
| 4006891 | Crucible for melting super-alloys A crucible for melting a nickel-based superalloy containing one or more of the elements aluminium, titanium and hafnium is made of magnesia grains bonded by tinania, hafnia or yttria. The purity of the magnesia is not less than 97%.... | 02/08/1977 |
