公开(公告)号：US06475260B2

公开(公告)日：2002-11-05

申请号：US09939857

申请日：2001-08-27

Applicant: Alfred F. LaCamera

Inventor： Alfred F. LaCamera

IPC: C22B2102

CPC classification number: C22B21/0053 ,  C22B5/10 ,  C22B9/02 ,  C22B21/02 ,  C22B21/066 ,  Y02P10/234

Abstract: A process for producing aluminum metal by carbothermic reduction of alumina ore. Alumina ore is heated in the presence of carbon at an elevated temperature to produce an aluminum metal body contaminated with about 10-30% by wt. aluminum carbide. Aluminum metal or aluminum alloy scrap then is added to bring the temperature to about 900-1000° C. and precipitate out aluminum carbide. The precipitated aluminum carbide is filtered, decanted, or fluxed with salt to form a molten body having reduced aluminum carbide content.

公开(公告)号：US06805723B2

公开(公告)日：2004-10-19

申请号：US10382972

申请日：2003-03-06

Applicant: Jan Arthur Aune ,  Kai Johansen

Inventor： Jan Arthur Aune ,  Kai Johansen

IPC: C22B2102

CPC classification number: C22B5/06 ,  C22B5/10 ,  C22B5/18 ,  C22B21/02 ,  C22B21/06

Abstract: A hollow partition wall is employed to feed carbon material to an underflow of a carbothermic reduction furnace used to make aluminum. The partition wall divides a low temperature reaction zone where aluminum oxide is reacted with carbon to form aluminum carbide and a high temperature reaction zone where the aluminum carbide and remaining aluminum oxide are reacted to form aluminum and carbon monoxide.

Abstract translation: 采用中空的隔壁将碳材料供给用于制造铝的碳热还原炉的底流。 分隔壁将氧化铝与碳反应的低温反应区域分割成碳化铝，并且使碳化铝和剩余的氧化铝反应形成铝和一氧化碳的高温反应区。

公开(公告)号：US06530970B2

公开(公告)日：2003-03-11

申请号：US09862196

申请日：2001-05-21

Applicant: Tor Lindstad

Inventor： Tor Lindstad

IPC: C22B2102

CPC classification number: B01D53/46 ,  B01D2251/208 ,  C01B32/914 ,  C01P2004/61 ,  C01P2006/12 ,  C22B5/06 ,  C22B21/02 ,  Y02P10/214 ,  Y02P10/218

Abstract: A method for aluminum recovery during the carbothermic production of aluminum in a smelting furnace (1,2) is disclosed, where during carbothermic reduction of alumina, aluminum and aluminum suboxide vapors are produced (3, 4), which are reacting with carbon. Reactive carbon is generated in situ by the cracking of hydrocarbon compounds (6) in a separate closed reactor vessel (5) at a temperature greater than about 1955° C. Solid aluminum carbide that formed during the reaction can then be recycled by a conduit (8) to the primary reactor for reduction to aluminum, and reactor gas (10) can be fed to a cooler (9).

公开(公告)号：US06440193B1

公开(公告)日：2002-08-27

申请号：US09862192

申请日：2001-05-21

Applicant: Kai Johansen ,  Jan A. Aune

Inventor： Kai Johansen ,  Jan A. Aune

IPC: C22B2102

CPC classification number: C22B21/02 ,  C22B5/10 ,  C22B21/066

Abstract: The present invention relates to a process for carbothermic production of aluminum where molten bath aluminum carbide and aluminum oxide are produced in a low temperature compartment (2), and continuously flow into a high temperature compartment (3) where the aluminum carbide is reacted with alumina to produce a top aluminum layer (31), where the aluminum layer (31) forms a layer on the top of a molten slag layer and is tapped from the high temperature compartment (3) at outlet (5), and where off-gases from the two compartments are treated in reactors fed by one or more columns (9, 19). According to the invention the low temperature compartment (2) and the high temperature compartment (3) are located in a common reaction vessel (1) where the low temperature compartment is separated from the high temperature compartment by an underflow partition wall (4). The present invention also includes precipitating and filtering aluminum carbide from the tapped molten aluminum, followed by degassing and casting to form aluminum shapes such as ingots (62). The present invention further relates to a reactor for production of aluminum by carbothermic reduction of aluminum.

Abstract translation: 本发明涉及在低温室（2）中制造熔融铝碳化铝和氧化铝的铝的碳热还原生产方法，并且连续地流入高温室（3），其中碳化铝与氧化铝反应 以产生顶部铝层（31），其中铝层（31）在熔渣层的顶部形成一层，并在出口（5）处从高温隔室（3）中抽出，并且在废气 来自两个隔室的反应器在由一个或多个塔（9,19）进料的反应器中进行处理。 根据本发明，低温室（2）和高温隔室（3）位于公共反应容器（1）中，其中低温隔室通过下溢分隔壁（4）与高温隔室分离。 本发明还包括从轻敲的熔融铝中沉淀和过滤碳化铝，然后进行脱气和铸造以形成诸如锭（62）的铝形状。 本发明还涉及通过碳热还原铝生产铝的反应器。

公开(公告)号：US06361580B1

公开(公告)日：2002-03-26

申请号：US09622753

申请日：2000-08-21

Applicant: Sven Plahte ,  Bjorn Lillebuen ,  Alexander F. Diaz ,  Jack B. Howard ,  Anthony J. Modestino ,  William A. Peters

Inventor： Sven Plahte ,  Bjorn Lillebuen ,  Alexander F. Diaz ,  Jack B. Howard ,  Anthony J. Modestino ,  William A. Peters

IPC: C22B2102

CPC classification number: C22B5/12 ,  C22B4/005 ,  C22B21/02

Abstract: A continuous process for the production of elemental aluminum is described. Aluminum is made from aluminum oxide and a reducing gas such as a light hydrocarbon gas or other reducing gas, for example hydrogen. In the process, a feed stream of the aluminum oxide and the reducing gas is continuously fed into a reaction zone. There the aluminum oxide and reducing gas are reacted at a temperature of about 1500° C. or greater in the reaction zone to provide a continuous product stream of reaction products, which include elemental aluminum. The product stream is continuously quenching after leaving the reaction zone, and the elemental aluminum is separated from the other reaction products.

Abstract translation: 描述了生产元素铝的连续方法。 铝由氧化铝和还原性气体例如轻烃气体或其它还原气体例如氢气制成。 在此过程中，将氧化铝和还原气体的进料流连续送入反应区。 在反应区中，氧化铝和还原气体在约1500℃或更高的温度下反应，以提供包括元素铝在内的反应产物的连续产物流。 离开反应区后，产物流继续猝灭，元素铝与其他反应产物分离。

公开(公告)号：US06179899B2

公开(公告)日：2001-01-30

申请号：US09571882

申请日：2000-05-16

Applicant: Kelvin T. Higa ,  Curtes E. Johnson ,  Richard A. Hollins

Inventor： Kelvin T. Higa ,  Curtes E. Johnson ,  Richard A. Hollins

IPC: C22B2102

CPC classification number: C22B21/0053 ,  B22F9/24 ,  B22F9/30 ,  B22F2998/00 ,  B22F1/0018 ,  B22F1/0088

Abstract: Fine aluminum powders are prepared by decomposing alane-adducts in organic solvents under an inert atmosphere to provide highly uniform particles and believed particularly effective as fuels and additives, in pyrotechnics, and in energetic materials. Effective adduct species are trialkyl amines and tetramethylethylenediamine, ethers and other aromatic amines. Effective production is obtained at atmospheric pressure and at temperatures as low as 50° C. with xylene solvent. Toluene, dioxane, and tetramethylethylenediamine were also effective solvents. Aliphatic solvents and other aromatic and polar solvents are believed effective. Titanium catalyst was provided as a halide, amide, and alkoxide; and it is believed that the corresponding compounds of zirconium, hafnium, vanadium, niobium, and tantalum are effective as catalysts. Particle size was controlled by varying catalyst concentration and by varying the concentration of an adducting species. It is believed that particle size is controllable by varying the catalyst, concentration of the reactants, polarity of the solvent, reaction temperature, and the stage and rate at which the solution is brought to this temperature. The product powder is passivated in the reaction vessel by exposing the solution to air before product separation or by controlling the admission of air to the separated, dried powder.

Abstract translation: 通过在惰性气氛下在有机溶剂中分解丙烯加成物来提供细铝粉，以提供高度均匀的颗粒，并被认为在烟火和高能材料中作为燃料和添加剂特别有效。 有效的加合物是三烷基胺和四甲基乙二胺，醚和其他芳族胺。 在大气压和低于50℃的温度下用二甲苯溶剂有效生产。 甲苯，二恶烷和四甲基乙二胺也是有效的溶剂。 脂肪族溶剂和其他芳族和极性溶剂被认为是有效的。 提供钛催化剂作为卤化物，酰胺和醇盐; 相信锆，铪，钒，铌和钽的相应化合物作为催化剂是有效的。 通过改变催化剂浓度和改变加合物质的浓度来控制粒度。 据信通过改变催化剂，反应物的浓度，溶剂的极性，反应温度以及溶液达到该温度的阶段和速率来控制粒度。 通过在产品分离之前将溶液暴露于空气或通过控制空气进入分离的干燥粉末，将产物粉末在反应容器中钝化。