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| Number | Title | Issue Date |
| 4457496 | Filtration block for liquid metals and alloys, with a mechanical and physical-chemical effect The invention concerns a filtration block for liquid alloys and metals, with a mechanical and physical-chemical effect. Agglomerating, for example by sintering, elements of an active mineral compound based on fluorides, results in a porous structure with a hig... | 07/03/1984 |
| 4401295 | Apparatus for treating molten metal An apparatus for treating a molten metal to a high quality by means of applying gas treating and filtration consecutively in a simple compact treating vessel. The vessel is divided into two parts, i.e., fluxing and filtration compartments, by a vertical p... | 08/30/1983 |
| 4395333 | Pre-wet and reinforced molten metal filter The present invention relates to an improved filter element for use in an apparatus for filtering molten metal, and to the method of making such filter element. The apparatus consists of a filtering vessel fitted with a filter element. In one embodiment o... | 07/26/1983 |
| 4394271 | Apparatus and method for filtration of molten metal An apparatus and method for filtering molten metal is disclosed. The apparatus includes a crucible, a portion of which is a porous filter material. Attached to the rim of the crucible is a shock resistant ring. The crucible is positioned such that the por... | 07/19/1983 |
| 4392888 | Metal treatment system Molten aluminum or other metals are purified by contacting with a fluorocarbon, such as CCl2 F2, in order to decrease the amount of impurity metal elements along with gas and inclusions therein preferably in the presence of an agitat... | 07/12/1983 |
| 4386956 | Metal recovery process from aluminum dross An improved method for recovery of metal, particularly aluminum, from metal bearing dross utilizes a trough for collection of the dross. A wedge member compresses the dross in the trough. In this manner, metal is decanted from the compressed dross and flo... | 06/07/1983 |
| 4384888 | Treating molten aluminum Molten metal, such as aluminum, is passed through a media of submerged contacting surfaces such as a filter bed. The contacting media is selected to provide a void fraction of at least one-half and a specific surface area of at least 50 sq. ft. per cubic ... | 05/24/1983 |
| 4379718 | Process for separating solid particulates from a melt A process for treating a metal recovery byproduct which contains solid ash constituents entrained in a melt comprising a major amount of a molten salt and a minor amount of molten metal in which the melt is filtered through a high-temperature filter appar... | 04/12/1983 |
| 4338124 | Method of purification of aluminium melts When optimizing the conventional purification methods, by gas, of aluminum in a molten state, a negative effect of the temperature has been revealed surprisingly when using a mixture of noble gases and carbon dioxide. In the same way, it has been proved i... | 07/06/1982 |
| 4298187 | Apparatus for inline degassing and filtration of molten metal The disclosure teaches an improvement in the degassing and filtration of molten metal, especially aluminum, using an apparatus which employs a pair of sequentially placed, removable filter-type plates and at least one fluxing gas inlet positioned therebet... | 11/03/1981 |
| 4277280 | Apparatus and method for removal of alkali and alkaline earth metals from molten aluminium For the removal of alkali metal and alkaline earth metal contaminants molten aluminium (including Mg-free aluminium alloys), is passed through an active bed of particles of material containing aluminium fluoride, maintained continuously immersed in molten... | 07/07/1981 |
| 4265659 | Molten metal filter The present invention provides a highly efficient, ceramic foam material for filtering molten metal which is characterized by improved strength reliability. The filter of the present invention is prepared by impregnating an organic foam material with an a... | 05/05/1981 |
| 4258099 | Cordierite, alumina, silica porous ceramic bodies coated with an activated alumina layer A ceramic porous body useful as a filtering material for molten metal is disclosed. The ceramic porous body, consisting essentially of cordierite, alumina and silica, is formed by covering surfaces of cell strands of a ceramic porous body skeleton having ... | 03/24/1981 |
| 4257810 | Cordierite, silica, alumina porous ceramic body A ceramic porous body for use in filtering molten metal is disclosed. The ceramic porous body has a three-dimensionally network cellular structure with a plurality of interconnected voids and is characterized by having a pore size of 25-35 pores per linea... | 03/24/1981 |
| 4246106 | Method for refining melts from solid impurities The method provides for filtration in the field of centrifugal forces generated in a filter immersed into a layer of a melt to be refined, with the solid impurities accumulating in the filter being strained from the residual melt beyond the layer of the m... | 01/20/1981 |
| 4177065 | Method for the degassing and filtration of molten metal The disclosure teaches an improved method and apparatus for the treatment of liquids with gases and especially for use in the degassing and filtration of molten metal, especially aluminum, using an apparatus which employs a swirling tank reactor. The swir... | 12/04/1979 |
| 4165235 | Method for inline degassing and filtration of molten metal The disclosure teaches an improvement in the degassing and filtration of molten metal, especially aluminum, using an apparatus which employs a pair of sequentially placed, removable filter-type plates and at least one fluxing gas inlet positioned therebet... | 08/21/1979 |
| 4154689 | Filtering and inline degassing of molten metal The disclosure teaches an improvement in the filtration of molten metal especially aluminum using a removable vertically disposed filter plate and at least one fluxing gas inlet positioned in such a manner so as to introduce fluxing gas into the filter pl... | 05/15/1979 |
| 4152470 | Method of making particles useful for removal of alkali and alkaline earth metals from light metal melts Alkali and alkaline earth metals are removed from light metal melts by causing the melt to flow through a bed consisting of granules of a mechanically resistant and chemically inert carrier particles which have a coating of carbon. A suitable granule is p... | 05/01/1979 |
| 4152141 | Method of removal of alkali and alkaline earth metals from light metal melts Alkali and alkaline earth metals are removed from light metal melts by causing the melt to flow through a bed consisting of granules of a mechanically resistant and chemically inert carrier particles which have a coating of carbon. A suitable granule is p... | 05/01/1979 |
| 4138246 | Process for lowering the concentration of sodium in aluminum melts The sodium content of aluminum melt is reduced efficiently to within acceptable limits by filtering the primary metal from the electrolytic cell through a loosely packed filter bed of granular material which in part comprises carbon. The treatment is carr... | 02/06/1979 |
| 4137073 | Method and apparatus for treating aluminous metal skim material and by-products of said method A method for treating hot skim material to separate, recover, and prepare for use both aluminum and non-aluminous constituents contained in the hot skim materials involves a centrifuge having a rotatable bowl to receive a charge of skim material. The cent... | 01/30/1979 |
| 4124506 | Method for the filtration of molten metal in a crucible type furnace An improved method for the filtration of molten metal for use in the production of castings is disclosed in which a ladling crucible provided with a ceramic foam filter is inserted into a furnace crucible which is filled with molten metal so that the molt... | 11/07/1978 |
| 4113241 | Apparatus for the filtration of molten metal in a crucible type furnace An improved apparatus for the filtration of molten metal for use in the production of castings is disclosed in which a ladling crucible provided with a ceramic foam filter is employed in a furnace type crucible to remove impurities.... | 09/12/1978 |
| 4092153 | Filtering and inline degassing of molten metal The disclosure teaches an improvement in the filtration of molten metal especially aluminum using a removable vertically disposed filter plate and at least one fluxing gas inlet positioned in such a manner so as to introduce fluxing gas into the filter pl... | 05/30/1978 |
| 4081371 | Filtering of molten metal The disclosure teaches an improvement in the filtration of molten metal, especially aluminum, using a removable filter plate. The filter plate is provided with a bevelled peripheral surface mating with a like bevelled surface in a filter chamber so that t... | 03/28/1978 |
| 4052198 | Method for in-line degassing and filtration of molten metal The disclosure teaches an improvement in the degassing and filtration of molten metal, especially aluminum, using an apparatus which employs a pair of sequentially placed, removable filter-type plates and at least one fluxing gas inlet positioned therebet... | 10/04/1977 |
| 4024056 | Filtering of molten metal The disclosure teaches an improvement in the filtration of molten metal, especially aluminum, using a removable filter plate. The filter plate is provided with a bevelled peripheral surface mating with a like bevelled surface in a filter chamber so that t... | 05/17/1977 |
| 3962081 | Ceramic foam filter The disclosure teaches an improved ceramic foam filter particularly useful for filtering molten metal, and also a method for filtering molten metal. The filter is characterized by a combination of properties which makes it particularly suitable for use in... | 06/08/1976 |
