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1.发明授权
公开(公告)号：US4769069A
公开(公告)日：1988-09-06
申请号：US946199
申请日：1986-12-24
CPC分类号： C22B26/22 , C22B21/02 , C22B21/04 , C22B26/20 , Y02P10/212
摘要： An improved process is disclosed for carbothermically producing an alkaline earth metal aluminide from an aluminum-bearing material which, in one aspect comprises forming a mixture of a carbonaceous reducing agent and a slag comprising the aluminum-bearing material, the alkaline earth metal compound; forming, at a first temperature, an alloy containing impurities in the slag; removing the alloy containing the impurities from the slag; and then heating the slag to a higher temperature to form the alkaline earth metal aluminide. The alkaline earth metal compound used in the process may comprise calcium carbide. Alternatively, both the alkaline earth metal compound and the aluminum-bearing material may be obtained using a calcium aluminate slag such as a byproduct from the steel industry. The calcium aluminate slag is purified in a preliminary step to remove silicon by alloying it with iron and then removing a ferrosilicon alloy formed in this step. Byproducts formed during the reactions may be recycled back if desired.Either metallic aluminum, the alkaline earth metal, or both may be recovered from the aluminide material using, respectively a halide, a sulfurous, or a nitrogen stripping agent, or by reducing both metals in an electrolytic reduction cell. The alkaline earth metal aluminide may also be used as a reducing agent to recover other metals such as magnesium oxide by reduction from their respective compounds.
摘要翻译： 公开了一种改进的方法，用于从含铝材料碳热还原生产碱土金属铝化物，其一方面包括形成碳质还原剂和包含含铝材料，碱土金属化合物的炉渣的混合物; 在第一温度下，在炉渣中形成含有杂质的合金; 从炉渣中除去含有杂质的合金; 然后将炉渣加热到更高的温度以形成碱土金属铝化物。 该方法中使用的碱土金属化合物可以包括碳化钙。 或者，碱土金属化合物和含铝材料都可以使用诸如来自钢铁工业的副产物的铝酸钙渣来获得。 在预备步骤中，将铝酸钙炉渣纯化，通过与铁合金除去硅，然后除去在该步骤中形成的硅铁合金。 如果需要，在反应期间形成的副产物可以再循环回来。 可以使用卤化物，亚硫酸或氮气剥离剂，或通过还原电解还原电池中的两种金属，从铝化物材料中回收金属铝，碱土金属或二者。 也可以使用碱土金属铝化物作为还原剂，从其各自的化合物中还原回收其它金属如氧化镁。
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2.发明授权Process for carbothermic production of alkaline earth metal aluminide and recovery of same 失效碱土金属铝化物的碳热生产方法及其回收方法
公开(公告)号：US4812168A
公开(公告)日：1989-03-14
申请号：US946200
申请日：1986-12-24
申请人： C. Norman Cochran , Melvin H. Brown
发明人： C. Norman Cochran , Melvin H. Brown
CPC分类号： C22B26/20 , C22B21/04 , C22B7/04 , C22C1/00 , Y02P10/212
摘要： An improved process is disclosed for carbothermically producing an alkaline earth metal aluminide from an aluminum-bearing material which, in one aspect comprises forming a mixture of a carbonaceous reducing agent and a slag comprising the aluminum-bearing material, the alkaline earth metal compound; forming, at a first temperature, an alloy containing impurities in the slag; removing the alloy containing the impurities from the slag; and then heating the slag to a higher temperature to form the alkaline earth metal aluminide. The alkaline earth metal compound used in the process may comprise calcium carbide. Alternatively, both the alkaline earth metal compound and the aluminum-bearing material may be obtained using a calcium aluminate slag such as a byproduct from the steel industry. The calcium aluminate slag is purified in a preliminary step to remove silicon by alloying it with iron and them removing a ferrosilicon alloy formed in this step. Byproducts formed during the reactions may be recycled back if desired.Either metallic aluminum, the alkaline earth metal, or both may be recovered from the aluminide material using, respectively a halide, a sulfurous, or a nitrogen stripping agent, or by reducing both metals in an electrolytic reduction cell. The alkaline earth metal aluminide may also be used as a reducing agent to recover other metals such as magnesium oxide by reduction from their respective compounds.
摘要翻译： 公开了一种改进的方法，用于从含铝材料碳热还原生产碱土金属铝化物，其一方面包括形成碳质还原剂和包含含铝材料，碱土金属化合物的炉渣的混合物; 在第一温度下，在炉渣中形成含有杂质的合金; 从炉渣中除去含有杂质的合金; 然后将炉渣加热到更高的温度以形成碱土金属铝化物。 该方法中使用的碱土金属化合物可以包括碳化钙。 或者，碱土金属化合物和含铝材料都可以使用诸如来自钢铁工业的副产物的铝酸钙渣来获得。 在预备步骤中，将铝酸钙炉渣纯化，以通过与铁合金除去硅，并除去在该步骤中形成的硅铁合金。 如果需要，在反应期间形成的副产物可以再循环回来。 可以使用卤化物，亚硫酸或氮气剥离剂，或通过还原电解还原电池中的两种金属，从铝化物材料中回收金属铝，碱土金属或二者。 也可以使用碱土金属铝化物作为还原剂，从其各自的化合物中还原回收其它金属如氧化镁。
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3.发明授权Process for production of aluminum by carbothermic production of an alkaline earth metal aluminide such as calcium aluminide and recycling of reactant byproducts 失效通过碱土金属铝化物如铝酸钙的碳热还原生产铝的生产方法和反应物副产物的再循环
公开(公告)号：US4769067A
公开(公告)日：1988-09-06
申请号：US946006
申请日：1986-12-24
申请人： C. Norman Cochran , Melvin H. Brown
发明人： C. Norman Cochran , Melvin H. Brown
CPC分类号： C22B26/22 , C22B21/02 , C22B21/04 , C22B26/20 , Y02P10/212
摘要： An improved process is disclosed for carbothermically producing an alkaline earth metal aluminide from an aluminum-bearing material which, in one aspect comprises forming a mixture of a carbonaceous reducing agent and a slag comprising the aluminum-bearing material, the alkaline earth metal compound; forming, at a first temperature, an alloy containing impurities in the slag; removing the alloy containing the impurities from the slag; and then heating the slag to a higher temperature to form the alkaline earth metal aluminide. The alkaline earth metal compound used in the process may comprise calcium carbide. Alternatively, both the alkaline earth metal compound and the aluminum-bearing material may be obtained using a calcium aluminate slag such as a byproduct from the steel industry. The calcium aluminate slag is purified in a preliminary step to remove silicon by alloying it with iron and then removing a ferrosilicon alloy formed in this step. Byproducts formed during the reactions may be recycled back if desired.Either metallic aluminum, the alkaline earth metal, or both may be recovered from the aluminide material using, respectively a halide, a sulfurous, or a nitrogen stripping agent, or by reducing both metals in an electrolytic reduction cell. The alkaline earth metal aluminide may also be used as a reducing agent to recover other metals such as magnesium oxide by reduction from their respective compounds.
摘要翻译： 公开了一种改进的方法，用于从含铝材料碳热还原生产碱土金属铝化物，其一方面包括形成碳质还原剂和包含含铝材料，碱土金属化合物的炉渣的混合物; 在第一温度下，在炉渣中形成含有杂质的合金; 从炉渣中除去含有杂质的合金; 然后将炉渣加热到更高的温度以形成碱土金属铝化物。 该方法中使用的碱土金属化合物可以包括碳化钙。 或者，碱土金属化合物和含铝材料都可以使用诸如来自钢铁工业的副产物的铝酸钙渣来获得。 在预备步骤中，将铝酸钙炉渣纯化，通过与铁合金除去硅，然后除去在该步骤中形成的硅铁合金。 如果需要，在反应期间形成的副产物可以再循环回来。 可以使用卤化物，亚硫酸或氮气剥离剂，或通过还原电解还原电池中的两种金属，从铝化物材料中回收金属铝，碱土金属或二者。 也可以使用碱土金属铝化物作为还原剂，从其各自的化合物中还原回收其它金属如氧化镁。
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4.发明授权Process for production of alkaline earth metal by carbothermic production of alkaline earth metal aluminide and stripping of alkaline earth metal from alkaline earth metal aluminide with nitrogen stripping agent 失效通过碱土金属铝化物的碳热还原生产碱土金属的制备方法和用碱性金属铝化物与氮气剥离剂从碱土金属铝化物中剥离碱土金属
公开(公告)号：US4765831A
公开(公告)日：1988-08-23
申请号：US946079
申请日：1986-12-24
申请人： C. Norman Cochran , Melvin H. Brown
发明人： C. Norman Cochran , Melvin H. Brown
CPC分类号： C22B26/20 , C22B21/0053 , C22B21/02 , C22B26/22 , C22B7/04 , Y02P10/212
摘要： An improved process is disclosed for carbothermically producing an alkaline earth metal aluminide from an aluminum-bearing material which, in one aspect comprises forming a mixture of a carbonaceous reducing agent and a slag comprising the aluminum-bearing material, the alkaline earth metal compound; forming, at a first temperature, an alloy containing impurities in the slag; removing the alloy containing the impurities from the slag; and then heating the slag to a higher temperature to form the alkaline earth metal aluminide. The alkaline earth metal compound used in the process may comprise calcium carbide. Alternatively, both the alkaline earth metal compound and the aluminum-bearing material may be obtained using a calcium aluminate slag such as a byproduct from the steel industry. The calcium aluminate slag is purified in a preliminary step to remove silicon by alloying it with iron and then removing a ferrosilicon alloy formed in this step. Byproducts formed during the reactions may be recycled back if desired.Either metallic aluminum, the alkaline earth metal, or both may be recovered from the aluminide material using, respectively a halide, a sulfurous, or a nitrogen stripping agent, or by reducing both metals in an electrolytic reduction cell. The alkaline earth metal aluminide may also be used as a reducing agent to recover other metals such as magnesium oxide by reduction from their respective compounds.
摘要翻译： 公开了一种改进的方法，用于从含铝材料碳热还原生产碱土金属铝化物，其一方面包括形成碳质还原剂和包含含铝材料，碱土金属化合物的炉渣的混合物; 在第一温度下，在炉渣中形成含有杂质的合金; 从炉渣中除去含有杂质的合金; 然后将炉渣加热到更高的温度以形成碱土金属铝化物。 该方法中使用的碱土金属化合物可以包括碳化钙。 或者，碱土金属化合物和含铝材料都可以使用诸如来自钢铁工业的副产物的铝酸钙渣来获得。 在预备步骤中，将铝酸钙炉渣纯化，通过与铁合金除去硅，然后除去在该步骤中形成的硅铁合金。 如果需要，在反应期间形成的副产物可以再循环回来。 可以使用卤化物，亚硫酸或氮气剥离剂，或通过还原电解还原电池中的两种金属，从铝化物材料中回收金属铝，碱土金属或二者。 也可以使用碱土金属铝化物作为还原剂，从其各自的化合物中还原回收其它金属如氧化镁。
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5.发明授权
公开(公告)号：US4769068A
公开(公告)日：1988-09-06
申请号：US946003
申请日：1986-12-24
申请人： C. Norman Cochran , Melvin H. Brown , Siba P. Ray
发明人： C. Norman Cochran , Melvin H. Brown , Siba P. Ray
CPC分类号： C22B26/22 , C22B21/02 , C22B21/04 , C22B26/20 , Y02P10/212
摘要： An improved process is disclosed for carbothermically producing an alkaline earth metal aluminide from an aluminum-bearing material which, in one aspect comprises forming a mixture of a carbonaceous reducing agent and a slag comprising the aluminum-bearing material, the alkaline earth metal compound; forming, at a first temperature, an alloy containing impurities in the slag; removing the alloy containing the impurities from the slag; and then heating the slag to a higher temperature to form the alkaline earth metal aluminide. The alkaline earth metal compound used in the process may comprise calcium carbide. Alternatively, both the alkaline earth metal compound and the aluminum-bearing material may be obtained using a calcium aluminate slag such as a byproduct from the steel industry. The calcium aluminate slag is purified in a preliminary step to remove silicon by alloying it with iron and then removing a ferrosilicon alloy formed in this step. Byproducts formed during the reactions may be recycled back is desired.Either metallic aluminum, the alkaline earth metal, or both may be recovered from the aluminide material using, respectively a halide, a sulfurous, or a nitrogen stripping agent, or by reducing both metals in an electrolytic reduction cell. The alkaline earth metal aluminide may also be used as a reducing agent to recover other metals such as magnesium oxide by reduction from their respective compounds.
摘要翻译： 公开了一种改进的方法，用于从含铝材料碳热还原生产碱土金属铝化物，其一方面包括形成碳质还原剂和包含含铝材料，碱土金属化合物的炉渣的混合物; 在第一温度下，在炉渣中形成含有杂质的合金; 从炉渣中除去含有杂质的合金; 然后将炉渣加热到更高的温度以形成碱土金属铝化物。 该方法中使用的碱土金属化合物可以包括碳化钙。 或者，碱土金属化合物和含铝材料都可以使用诸如来自钢铁工业的副产物的铝酸钙渣来获得。 在预备步骤中，将铝酸钙炉渣纯化，通过与铁合金除去硅，然后除去在该步骤中形成的硅铁合金。 在反应期间形成的副产物可以被再循环回来。 可以使用卤化物，亚硫酸或氮气剥离剂，或通过还原电解还原电池中的两种金属，从铝化物材料中回收金属铝，碱土金属或二者。 也可以使用碱土金属铝化物作为还原剂，从其各自的化合物中还原回收其它金属如氧化镁。
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6.发明授权
公开(公告)号：US4765832A
公开(公告)日：1988-08-23
申请号：US946004
申请日：1986-12-24
申请人： Melvin H. Brown , C. Norman Cochran , Noel Jarrett
发明人： Melvin H. Brown , C. Norman Cochran , Noel Jarrett
CPC分类号： C22B7/04 , C22B21/0053 , C22B21/02 , C22B26/20 , C22B26/22 , Y02P10/212
摘要： An improved process is disclosed for carbothermically producing an alkaline earth metal aluminide from an aluminum-bearing material which, in one aspect comprises forming a mixture of a carbonaceous reducing agent and a slag comprising the aluminum-bearing material, the alkaline earth metal compound; forming, at a first temperature, an alloy containing impurities in the slag; removing the alloy containing the impurities from the slag; and then heating the slag to a higher temperature to form the alkaline earth metal aluminide. The alkaline earth metal compound used in the process may comprise calcium carbide. Alternatively, both the alkaline earth metal compound and the aluminum-bearing material may be obtained using a calcium aluminte slag such as a byproduct from the steel industry. The calcium aluminate slag is purified in a preliminary step to remove silicon by alloying it with iron and then removing a ferrosilicon alloy formed in this step. Byproducts formed during the reactions may be recycled back if desired.Either metallic aluminum, the alkaline earth metal, or both may be recovered from the aluminide material using, respectively a halide, a sulfurous, or a nitrogen stripping agent, or by reducing both metals in an electrolytic reduction cell. The alkaline earth metal aluminide may also be used as a reducing agent to recover other metals such as magnesium oxide by reduction from their respective compounds.
摘要翻译： 公开了一种改进的方法，用于从含铝材料碳热还原生产碱土金属铝化物，其一方面包括形成碳质还原剂和包含含铝材料，碱土金属化合物的炉渣的混合物; 在第一温度下，在炉渣中形成含有杂质的合金; 从炉渣中除去含有杂质的合金; 然后将炉渣加热到更高的温度以形成碱土金属铝化物。 该方法中使用的碱土金属化合物可以包括碳化钙。 或者，可以使用诸如来自钢铁工业的副产物的钙铝渣来获得碱土金属化合物和含铝材料。 在预备步骤中，将铝酸钙炉渣纯化，通过与铁合金除去硅，然后除去在该步骤中形成的硅铁合金。 如果需要，在反应期间形成的副产物可以再循环回来。 可以使用卤化物，亚硫酸或氮气剥离剂，或通过还原电解还原电池中的两种金属，从铝化物材料中回收金属铝，碱土金属或二者。 也可以使用碱土金属铝化物作为还原剂，从其各自的化合物中还原回收其它金属如氧化镁。
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7.发明授权Process for reduction of metal compounds by reaction with alkaline earth metal aluminide 失效通过与碱土金属铝化物反应还原金属化合物的方法
公开(公告)号：US4735654A
公开(公告)日：1988-04-05
申请号：US946002
申请日：1986-12-24
申请人： C. Norman Cochran , Melvin H. Brown
发明人： C. Norman Cochran , Melvin H. Brown
摘要： An improved process is disclosed for carbothermically producing an alkaline earth metal aluminide from an aluminum-bearing material which, in one aspect comprises forming a mixture of a carbonaceous reducing agent and a slag comprising the aluminum-bearing material, the alkaline earth metal compound; forming, at a first temperature, an alloy containing impurities in the slag; removing the alloy containing the impurities from the slag; and then heating the slag to a higher temperature to form the alkaline earth metal aluminide. The alkaline earth metal compound used in the process may comprise calcium carbide. Alternatively, both the alkaline earth metal compound and the aluminum-bearing material may be obtained using a calcium aluminate slag such as a byproduct from the steel industry. The calcium aluminate slag is purified in a preliminary step to remove silicon by alloying it with iron and then removing a ferrosilicon alloy formed in this step. Byproducts formed during the reactions may be recycled back if desired.Either metallic aluminum, the alkaline earth metal, or both may be recovered from the aluminide material using, respectively a halide, a sulfurous, or a nitrogen stripping agent, or by reducing both metals in an electrolytic reduction cell. The alkaline earth metal aluminide may also be used as a reducing agent to recover other metals such as magnesium oxide by reduction from their respective compounds.
摘要翻译： 公开了一种改进的方法，用于从含铝材料碳热还原生产碱土金属铝化物，其一方面包括形成碳质还原剂和包含含铝材料，碱土金属化合物的炉渣的混合物; 在第一温度下，在炉渣中形成含有杂质的合金; 从炉渣中除去含有杂质的合金; 然后将炉渣加热到更高的温度以形成碱土金属铝化物。 该方法中使用的碱土金属化合物可以包括碳化钙。 或者，碱土金属化合物和含铝材料都可以使用诸如来自钢铁工业的副产物的铝酸钙渣来获得。 在预备步骤中，将铝酸钙炉渣纯化，通过与铁合金除去硅，然后除去在该步骤中形成的硅铁合金。 如果需要，在反应期间形成的副产物可以再循环回来。 可以使用卤化物，亚硫酸或氮气剥离剂，或通过还原电解还原电池中的两种金属，从铝化物材料中回收金属铝，碱土金属或二者。 也可以使用碱土金属铝化物作为还原剂，从其各自的化合物中还原回收其它金属如氧化镁。
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8.发明授权
公开(公告)号：US4770696A
公开(公告)日：1988-09-13
申请号：US946001
申请日：1986-12-24
CPC分类号： C22B21/0053
摘要： An improved process is disclosed for carbothermically producing an alkaline earth metal aluminide from an aluminum-bearing material which, in one aspect comprises forming a mixture of a carbonaceous reducing agent and a slag comprising the aluminum-bearing material, the alkaline earth metal compound; forming, at a first temperature, an alloy containing impurities in the slag; removing the alloy containing the impurities from the slag; and then heating the slag to a higher temperature to form the alkaline earth metal aluminide. The alkaline earth metal compound used in the process may comprise calcium carbide. Alternatively, both the alkaline earth metal compound and the aluminum-bearing material may be obtained using a calcium aluminate slag such as a byproduct from the steel industry. The calcium aluminate slag is purified in a preliminary step to remove silicon by alloying it with iron and then removing a ferrosilicon alloy formed in this step. Byproducts formed during the reactions may be recycled back if desired.Either metallic aluminum, the alkaline earth metal, or both may be recovered from the aluminide material using, respectively a halide, a sulfurous, or a nitrogen stripping agent, or by reducing both metals in an electrolytic reduction cell. The alkaline earth metal aluminide may also be used as a reducing agent to recover other metals such as magnesium oxide by reduction from their respective compounds.
摘要翻译： 公开了一种改进的方法，用于从含铝材料碳热还原生产碱土金属铝化物，其一方面包括形成碳质还原剂和包含含铝材料，碱土金属化合物的炉渣的混合物; 在第一温度下，在炉渣中形成含有杂质的合金; 从炉渣中除去含有杂质的合金; 然后将炉渣加热到更高的温度以形成碱土金属铝化物。 该方法中使用的碱土金属化合物可以包括碳化钙。 或者，碱土金属化合物和含铝材料都可以使用诸如来自钢铁工业的副产物的铝酸钙渣来获得。 在预备步骤中，将铝酸钙炉渣纯化，通过与铁合金除去硅，然后除去在该步骤中形成的硅铁合金。 如果需要，在反应期间形成的副产物可以再循环回来。 可以使用卤化物，亚硫酸或氮气剥离剂，或通过还原电解还原电池中的两种金属，从铝化物材料中回收金属铝，碱土金属或二者。 也可以使用碱土金属铝化物作为还原剂，从其各自的化合物中还原回收其它金属如氧化镁。
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9.发明授权
公开(公告)号：US4724054A
公开(公告)日：1988-02-09
申请号：US946005
申请日：1986-12-24
申请人： Melvin H. Brown , C. Norman Cochran
发明人： Melvin H. Brown , C. Norman Cochran
摘要： An improved process is disclosed for carbothermically producing an alkaline earth metal aluminide from an aluminum-bearing material which, in one aspect comprises forming a mixture of a carbonaceous reducing agent and a slag comprising the aluminum-bearing material, the alkaline earth metal compound, forming, at a first temperature, an alloy containing impurities in the slag; removing the alloy containing the impurities from the slag; and then heating the slag to a higher temperature to form the alkaline earth metal aluminide. The alkaline earth metal compound used in the process may comprise calcium carbide. Alternatively, both the alkaline earth metal compound and the aluminum-bearing material may be obtained using a calcium aluminate slag such as a byproduct from the steel industry. The calcium aluminate slag is purified in a preliminary step to remove silicon by alloying it with iron and then removing a ferrosilicon alloy formed in this step. Byproducts formed during the reactions may be recycled back if desired.Either metallic aluminum, the alkaline earth metal, or both may be recovered from the aluminide material using, respectively a halide, a sulfurous, or a nitrogen stripping agent, or by reducing both metals in an electrolytic reduction cell. The alkaline earth metal aluminide may also be used as a reducing agent to recover other metals such as magnesium oxide by reduction from their respective compounds.
摘要翻译： 公开了一种改进的方法，用于从含铝材料中碳热还原生产碱土金属铝化物，其一方面包括形成碳质还原剂和包含含铝材料，碱土金属化合物的成渣的混合物，形成 在第一温度下，在炉渣中含有杂质的合金; 从炉渣中除去含有杂质的合金; 然后将炉渣加热到更高的温度以形成碱土金属铝化物。 该方法中使用的碱土金属化合物可以包括碳化钙。 或者，碱土金属化合物和含铝材料都可以使用诸如来自钢铁工业的副产物的铝酸钙渣来获得。 在预备步骤中，将铝酸钙炉渣纯化，通过与铁合金除去硅，然后除去在该步骤中形成的硅铁合金。 如果需要，在反应期间形成的副产物可以再循环回来。 可以使用卤化物，亚硫酸或氮气剥离剂，或通过还原电解还原电池中的两种金属，从铝化物材料中回收金属铝，碱土金属或二者。 也可以使用碱土金属铝化物作为还原剂，从其各自的化合物中还原回收其它金属如氧化镁。
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公开(公告)号：US5538604A
公开(公告)日：1996-07-23
申请号：US375790
申请日：1995-01-20
CPC分类号： A62D3/37 , A62D3/30 , C25C3/08 , A62D2101/45
摘要： Disclosed is an improved carbonaceous material suitable for use as a liner in an aluminum producing electrolytic cell, the cell using an electrolyte comprised of sodium containing compounds and the carbonaceous material penetrable by sodium or nitrogen and resistant to formation or accumulation of sodium cyanide during operation of the cell. The carbonaceous material is comprised of carbon and a reactive compound capable of reacting with one of sodium, nitrogen and sodium cyanide during operation of the cell to produce aluminum, the reactive compound present in an amount sufficient to suppress formation or accumulation of cyanide compounds in the liner.
摘要翻译： 公开了一种改进的碳质材料，适合用作铝生产电解槽中的衬垫，该电池使用由含钠化合物组成的电解质和可渗透钠或氮的碳质材料，并且在运行期间耐氰化钠形成或积聚 细胞。 碳质材料由碳和能够在电池操作期间与钠，氮和氰化钠中的一种反应生成铝的反应性化合物构成，反应性化合物的存在量足以抑制氰化物在 衬垫。
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