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公开(公告)号：US5196047A
公开(公告)日：1993-03-23
申请号：US791961
申请日：1991-11-13
Applicant: Jan A. Aune
Inventor： Jan A. Aune
CPC classification number: C22B7/02 , C22B19/12 , C22B5/04 , C22B5/16 , C22B7/04 , Y02P10/214 , Y02P10/22 , Y02P10/224 , Y02P10/232
Abstract: The present invention relates to a method for treatment of zinc-containing by-products and waste materials from primary and secondary production of nonferrous metals and especially zinc- and leadcontaining slags from the production of lead. The by-products and the waste materials are supplied to a gastight closed electric smelting furnace in which the materials are melted and subjected to a selective metallothermic reduction in order to reduce and volatilize zinc and other volatile metals. Elemental sulphur and/or sulphur compounds are added to the smelting furnace in an amount sufficient to form a sulphide phase containing one or more of the elements Cu, Ni, Pb, As, Bi, Sb and Ag. An inert slag phase and the sulphide phase are tapped from the furnace, and zinc and other volatile metals are recovered from the off-gas from the furnace by condensation.
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2.发明授权Method for melting ferrous scrap metal and chromite in a submerged arc furnace to produce a chromium containing iron 失效在埋弧炉中熔炼亚铁废金属和铬铁矿以生产含铬铁的方法
公开(公告)号：US5654976A
公开(公告)日：1997-08-05
申请号：US423771
申请日：1995-04-18
Applicant: Peter Cowx , Hjalte Rognsaa
Inventor： Peter Cowx , Hjalte Rognsaa
CPC classification number: C21C5/562 , C21C5/5264 , C21C5/527 , F27B3/085 , C21C2005/5258 , Y02P10/216
Abstract: The process feeds a mixture of scrap metal, chromite, flux materials, carbonaceous material and wood chips to a submerged arc furnace to make a base iron suitable for iron and steel purposes. The mixture contains about 1-60% chromite, about 1 to 20% flux materials, about 5 to 35% carbonaceous material, about 0-10% wood chips, all based on the weight of scrap in the mixture. By maintaining the charge in the furnace, good energy efficiencies are obtained.
Abstract translation: 该工艺将废金属，铬铁矿，助焊剂材料，含碳材料和木屑混合物送入埋弧炉，制成适合钢铁目的的基础铁。 该混合物含有大约1-60％的亚铬酸盐，约1到20％的助熔剂材料，约5到35％的碳质材料，大约0-10％的木屑，都是基于混合物中废料的重量。 通过保持炉内的电荷，可获得良好的能量效率。
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公开(公告)号：US5188658A
公开(公告)日：1993-02-23
申请号：US628573
申请日：1990-12-14
Applicant: Jan A. Aune , Inger J. Eikeland , Thor Pedersen
Inventor： Jan A. Aune , Inger J. Eikeland , Thor Pedersen
CPC classification number: C22B4/04 , C22B1/16 , C22B19/28 , C22B7/02 , Y02P10/212
Abstract: The present invention relates to a method for recovering zinc from zinc-containing materials, especially from zinc-containing materials recovered from waste gases in metallurgical smelting processes. Particulate zinc-containing materials are agglomerated together with a carbonaceous reduction material and optionally slag forming materials, and are supplied to a gas tight closed electrothermic smelting furnace containing a molten bath kept at a temperature between 1200.degree. and 1700.degree. C. in which the agglomerates are smelted and subjected to selective reduction and volatilization of zinc and other volatile metals. An inert slag phase and optionally a liquid metal phase are tapped from the smelting furnace, and zinc and other volatile metals are recovered from the waste gas from the smelting furnace by condensation. In order to prevent reoxidation of metallic zinc the particulate zinc-containing materials are agglomerated together with a carbonaceous binder which cracks at a temperature below 700.degree. C. and forms carbon black, and that the temperature in the gas atmosphere in the smelting furnace is kept above 1000.degree. C. in order to maintain a volume ratio between CO.sub.2 and CO in the gas atmosphere in the smelting furnaces below 0.3.
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公开(公告)号：US5146469A
公开(公告)日：1992-09-08
申请号：US611930
申请日：1990-11-09
Applicant: Erik Svana
Inventor： Erik Svana
Abstract: The present invention relates to a method and a means for continuous production of elongated carbon bodies having a constant or substantially constant cross-section where a casing filled with unbaked paste consisting of carbon and a carbon containing binder is continuously baked to a solid carbon body by heating by means of direct electric current. The first terminal of the direct current source is being slidably connected to the casing through a plurality of vertical ribs extending radially outwards from the casing, said ribs being made from a current conducting material, and the second terminal of the direct current source being connected to the baked part of the carbon body or to a bottom contact in a smelting furnace in which the carbon body is consumed. The casing containing the carbon containing paste is continuously or substantially continuously moved in axial direction by means of slipping- and holding means. The present invention thus relates to carbon bodies baked outside a smelting furnace and to carbon bodies which are produced in direct connection with the smelting furnace wherein the carbon bodies are consumed.
Abstract translation: 本发明涉及一种用于连续生产具有恒定或基本上恒定的横截面的细长碳体的方法和装置，其中将填充有由碳和含碳粘合剂组成的未烘烤糊状物的套管连续地烘烤成固体碳体， 通过直流电加热。 直流源的第一端子通过从壳体径向向外延伸的多个垂直肋可滑动地连接到壳体，所述肋由电流导电材料制成，并且直流源的第二端子连接到 碳体的烘烤部分或碳体被消耗的熔炼炉中的底部接触。 含有含碳糊料的壳体通过滑动和保持装置在轴向上连续或基本上连续移动。 因此，本发明涉及在冶炼炉外部烘烤的碳体和与冶炼炉直接相连制造的碳体，其中碳体被消耗。
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公开(公告)号：US5103072A
公开(公告)日：1992-04-07
申请号：US540458
申请日：1990-06-18
Applicant: Inger J. Eikeland , Per Poppe
Inventor： Inger J. Eikeland , Per Poppe
Abstract: The present invention relates to a plasma torch intended for being submerged into a bath of molten metal, such as for example a steel melt. The torch comprises an outer electrode made from a non-consumable material and an inner electrode, where at least the outer electrode is made from a copper pipe having internal channels for circulation of a cooling medium, said copper pipe at least on the outside having a layer of refractory material.The layer of refractory material has a thickness between 1 and 5 mm and is made from Al.sub.2 O.sub.3 or from ZrO.sub.2 stabilized with 5-25% by weight of MgO and/or Y.sub.2 O.sub.3 or oxides of other rare earth elements.
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Patent Agency Ranking
公开(公告)号：US5092564A
公开(公告)日：1992-03-03
申请号：US556265
申请日：1990-07-20
Applicant: Toralv Basen , Robin Ephithite
Inventor： Toralv Basen , Robin Ephithite
Abstract: The present invention relates to a method for production of metals and/or ferro alloys by prereduction of particulate metal oxide co-current with a reducing gas. Reducing gas having a temperature between 650.degree. and 1100.degree. C. and metal oxide particles are supplied at the lower end of a substantially vertical prereduction column which comprises at least two chambers having a substantially circular cross-section, said chambers in their upper and lower ends having a decreasing cross-section and where a ringshaped member for decreasing the cross-section is arranged in the intermediate zone between the chambers. The mixture of reducing gas and prereduced metal oxide particles is collected at the top of the prereduction column, whereafter the prereduced metal oxide particles are transported to a smelting furnace for smelting and final reduction to metallix state by addition of a reduction material.The present invention also relates to a column for treatment of particulate solid materials with a gas. The column comprises at least two chambers having a substantially circular cross-section. The chambers have in their upper and lower ends a dreasing cross-section, and a ringshaped member is arranged at least in the intermediate zone between each chamber for decreasing the cross-section in the intermediate zone.
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公开(公告)号：US4975116A
公开(公告)日：1990-12-04
申请号：US339687
申请日：1989-04-18
Applicant: Toralv Basen , Robin Ephithite
Inventor： Toralv Basen , Robin Ephithite
Abstract: The present invention relates to a method for production of metals and/or ferro alloys by prereduction of particulate metal oxide co-current with a reducing gas. Reducing gas having a temperature between 650.degree. and 1100.degree. C. and metal oxide particles are supplied at the lower end of a substantially vertical prereduction column which comprises at least two chamber having a substantially circular cross-section, said chambers in their upper and lower ends having a decreasing cross-section and where a ringshaped member for decreasing the cross-section is arranged in the intermediate zone between the chambers. The mixture of reducing gas and prereduced metal oxide particles is collected at the top of the prereduction column, whereafter the prereduced metal oxide particles are transported to a smelting furnace for smelting and final reduction to metallic state by addition of a reduction material.The present invention also relates to a column for treatment of particulate solid materials with a gas. The column comprises at least two chambers having a substantially circular cross-section. The chambers have in their upper and lower ends a decreasing cross-section, and a ringshaped member is arranged at least in the intermediate zone between each chamber for decreasing the cross-section in the intermediate zone.
Abstract translation: 本发明涉及通过与还原气体预还原颗粒状金属氧化物并流来生产金属和/或铁合金的方法。 温度在650℃到1100℃之间的还原气体和金属氧化物颗粒在基本上垂直的预还原塔的下端处供应，其包括至少两个具有基本圆形横截面的室，所述室在其上部和下部 具有减小横截面的端部，并且其中用于减小横截面的环形构件布置在室之间的中间区域中。 将还原气体和预还原金属氧化物颗粒的混合物收集在预还原塔的顶部，然后通过添加还原材料将预还原的金属氧化物颗粒输送到熔炼炉中进行熔炼和最终还原成金属状态。 本发明还涉及一种用气体处理颗粒状固体材料的柱。 该柱包括具有基本圆形横截面的至少两个室。 这些腔室的上端和下端具有减小的横截面，并且环形构件至少设置在每个室之间的中间区域中，以减小中间区域中的横截面。
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公开(公告)号：US5363901A
公开(公告)日：1994-11-15
申请号：US979616
申请日：1992-11-19
Applicant: Karl O. Bjornestol , Jan T. Malmo , Yngve Strom , Eiolf Vikhagen
Inventor： Karl O. Bjornestol , Jan T. Malmo , Yngve Strom , Eiolf Vikhagen
IPC: G01N21/89 , G01N21/892 , G01N21/894 , B22D11/00
CPC classification number: G01N21/894 , G01N2021/889
Abstract: Continuously cast metal billets are continuously passed by a symmetric light source comprising a plurality of single light sources arranged in a circle or in another way such that the light falls substantially symmetrically on the part of the surface of the metal billet which is to be detected in such a way that the surface of the metal billet which faces the light source is illuminated except for pinholes. Reflected light from the surface of the billet is detected by a linescan camera arranged centrally in relation to the light source, which camera has a scanning direction normal to the direction of movement of the metal billet, whereby pinholes are detected by registration of reflected light intensity below a preset threshold value.
Abstract translation: 连续铸造的金属坯料通过对称光源连续通过，该对称光源包括以圆形或另一种方式布置的多个单个光源，使得光将基本上对称地落在待检测的金属坯料的表面的一部分上 除了针孔以外，面向光源的金属坯料的表面被照亮。 来自坯料表面的反射光通过相对于光源居中布置的线扫描相机来检测，该相机具有与金属坯料的移动方向垂直的扫描方向，由此通过配准反射光强度来检测针孔 低于预设阈值。
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9.发明授权
公开(公告)号：US5286274A
公开(公告)日：1994-02-15
申请号：US971054
申请日：1992-11-03
Applicant: Jon G. Lindkvist , Terje Johnsen
Inventor： Jon G. Lindkvist , Terje Johnsen
IPC: A62D3/33 , A62D3/38 , A62D101/26 , A62D101/43 , A62D101/45 , A62D101/49 , C22B21/00
CPC classification number: A62D3/38 , A62D3/33 , A62D3/40 , C25C3/08 , A62D2101/26 , A62D2101/43 , A62D2101/45 , A62D2101/49 , A62D2203/04
Abstract: This is a method for treatment of spent potlining from aluminium reduction cells including the refractory material in order to transfer the spent potlining to a form in which it can be used as a filler or as a raw material. The spent potlining is crushed and supplied to a closed electrothermic smelting furnace optionally together with a SiO.sub.2 source, wherein the spent potlining is melted at a temperature between 1300.degree. and 1750.degree. C. An oxidation agent is supplied to the furnace in order to oxidize carbon and other oxidizable components contained in the spent potlining such as metals, carbides and nitrides. Further, a source of calcium oxide is supplied to the smelting furnace in an amount necessary to react with all fluoride present to form CaF.sub.2 and to form a calcium aluminate or calcium aluminate silicate slag containing CaF.sub.2 which slag is liquid at the bath temperature in the furnace, and that the calcium aluminate or calcium aluminate silicate slag and optionally a metal phase are tapped from the furnace and cooled to blocks or granules.
Abstract translation: 这是一种用于处理包括耐火材料在内的铝还原电池的乏花化的方法，以便将废弃的陶瓷衬底转移到其可用作填料或原料的形式。 废弃的铜精粉被粉碎并任选地与SiO 2源一起供应到封闭的电热熔炼炉中，其中废锅炉在1300℃和1750℃之间的温度下熔化。将氧化剂供应到炉中以氧化碳 以及废铜罐中所含的其它可氧化组分，例如金属，碳化物和氮化物。 此外，将氧化钙源以与所存在的所有氟化物反应形成CaF 2并与其形成含有CaF 2的铝酸钙或铝酸钙硅酸盐渣进行反应，其中炉渣在熔池温度下为液态 ，并且从炉中抽出铝酸钙或铝酸钙硅酸盐渣和任选的金属相并冷却成块或颗粒。
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公开(公告)号：US5069005A
公开(公告)日：1991-12-03
申请号：US451756
申请日：1989-12-18
Applicant: Heljar Hovland , Jan Nilsen , Yngve Strom
Inventor： Heljar Hovland , Jan Nilsen , Yngve Strom
IPC: G01N25/72
CPC classification number: G01N25/72
Abstract: The present invention relates to a method for detecting flaws and surface defects in metallic workpieces, particularly in non-magnetic steel workpieces. The surface of the workpiece is heated by passing the workpiece in its longitudinal direction through an induction coil, scanning the surface of the workpiece with an infrared camera transversely across the surface of the moving workpiece immediately after induction heating and recording a streaked pattern temperature profile in which the streaked pattern repeats itself where there are flaws in the surface. It is used an induction coil with a current frequency which gives a penetration depth of the induced current in the workpiece which is greater than the depth of the flaws which are to be detected. The flaws and surface defects are detected by recording a lower surface temperature than the rest of the surface of the workpiece by scanning the temperature profile immediately after induction heating.
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