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公开(公告)号：US3737305A
公开(公告)日：1973-06-05
申请号：US3737305D
申请日：1970-12-02
Applicant: ALUMINUM CO OF AMERICA
Inventor： BLAYDEN L , BRONDYKE K , SPEAR R
CPC classification number: C22B9/055 , C22B21/066
Abstract: THIS IS A IMPROVEMENT IN A MOLTEN ALUMINUM REFINING PROCESS OF THE TYPE DESCRIBED IN U.S. PAT.3,039,864 WHERE A NON-REACTIVE FLUXING GAS IS PASSED THROUGH MOLTEN ALUMINUM AS IT MOVES THROUGH A BED OF REFRACTORY BODIES TO REMOVE FROM THE ALUMINUM HYDROGEN GAS AN NON-METALLIC IMPURITIES SUCH AS OXIDES. ACCORDING TO THE IMPROVEMENT A RELATIVELY SMALL STREAM OF A REACTIVE CHLORINACEOUS FLUXING GAS INTRODUCED ALONG WITH THE NON-REACTIVE FLUXING GAS SUBSTANTIALLY INCREASES THE USEFUL LIFE OF THE REFRACTORY BODY BED. THE PROCESS IS CAPABLE OF CHLORINE FUME-FREE OPERATION.
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公开(公告)号：US3770420A
公开(公告)日：1973-11-06
申请号：US3770420D
申请日：1971-07-29
Applicant: ALUMINUM CO OF AMERICA
Inventor： SPEAR R , ORMESHER R , SHORT H
IPC: C22B21/00
CPC classification number: C22B21/0084
Abstract: Solid aluminum charge is melted by contact with superheated molten aluminum in a charging bay or compartment. The molten aluminum is heated in a separate bay wherein special flow conditions are maintained to improve the rate of heat input to the melt. The temperatures exiting the heating and charging bays are also controlled.
Abstract translation: 固体铝电荷通过与充电槽或隔间中的过热熔融铝接触来熔化。 熔融铝在独立的隔间中被加热，其中保持特殊的流动条件以提高对熔体的输入速率。 离开加热和充电槽的温度也受到控制。
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公开(公告)号：US3737304A
公开(公告)日：1973-06-05
申请号：US3737304D
申请日：1970-12-02
Applicant: ALUMINUM CO OF AMERICA
Inventor： BLAYDEN L , BRONDYKE K , SPEAR R
IPC: C22B21/06
CPC classification number: C22B21/066
Abstract: THE SODIUM OXIDE AND HYDROGEN CONTENT OF MOLTEN ALUMINUM IS DRASTICALLY REDUCED BY MOVNG THE MOLTEN ALUMINUM THROUGH TWO PURIFYING ZONES. IN EACH ZONE THE MOLTEN ALUMINUM IS MOVED THROUGH A BED OF REFRACTORY BODIES IN CONTACT WITH FLUXING GASES. CONDITIONS ARE CAREFULLY MAINTAINED TO REMOVE IMPURITIES WHILE PREVENTING DETERIORATION OF THE BEDS. THE PROCESS CAN BE OPERATED ON A POLLUTION FREE BASIS AND YET ACHIEVE EXTREMELY LOW IMPURITY LEVELS.
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公开(公告)号：US3737303A
公开(公告)日：1973-06-05
申请号：US3737303D
申请日：1970-12-02
Applicant: ALUMINUM CO OF AMERICA
Inventor： BLAYDEN L , BRONDYKE K , SPEAR R
CPC classification number: C22B21/066 , B22D43/004
Abstract: THE SODIUM CONTENT OF MOLTEN ALUMINUM ALONG WITH THE OXIDE AND HYDROGEN GAS CONTENT, IS REDUCED BY AN IMPROVED PROCESS WHEREIN THE MOLTEN ALUMINUM IS PASSED THROUGH A BED OF REFRACTORY BODIES. THE REFRACTORY BODIES HAVE THEIR SURFACES ACTIVATED BY CHLORINE AND ARE REACTIVE TO THE SODIUM IMPURITIES. THE REFRACTORY BODY BED IS CONTINUOUSLY FLUSHED WITH A NON-REACTIVE GAS FUX TO REMOVE CHLORINE REACTION PRODUCTS FORMED IN THE BED. THE IMPROVEMENT IS CAPABLE OF CHLORINE FUME-FREE OPERATION AND ACCORDINGLY IS ESPECIALLY USEFUL WHERE POLLUTION CONTROL IS IMPORTANT.
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