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1.发明授权公开(公告)号：US11685966B2
公开(公告)日：2023-06-27
申请号：US16634909
申请日：2018-09-19
Inventor： Shengen Zhang , Bo Liu , Rui Lin
CPC classification number: C22C1/026 , B22C9/086 , B22D21/007 , B22D43/00 , C22B21/0007 , C22B21/0092 , C22B21/066 , C22C1/03
Abstract: The present invention relates to techniques for producing 2024 and 7075 aluminum alloys by recycling waste aircraft aluminum alloys, which belong to technical fields for circular economy. The present invention develops techniques for obtaining the 2024 and 7075 aluminum alloys by subjecting waste aircraft aluminum alloys as raw materials to pretreatment, smelting, impurity removal, melt ingredient assay, ingredient adjustment, refining, and casting. Through utilizing the waste package aluminum alloys and the waste aluminum pop-top cans to adjust the ingredients, the waste aircraft aluminum alloys would be recycled at a lower cost without downgrading. The present invention has some advantages, such as low cost, and applicability for industrial production, as well as prominent economic benefit.
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公开(公告)号：US20210356118A1
公开(公告)日：2021-11-18
申请号：US16335677
申请日：2017-11-30
Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
Inventor： Shengen Zhang , Lin Li , Bo Liu , Bolin Zhang
Abstract: A pure oxygen combustion method with a low nitrogen source is provided, relating to a technical field of thermal engineering. The method includes steps of: adopting a low nitrogen fuel, and adopting pure oxygen as a combustion-supporting gas; separately transporting the pure oxygen and the low nitrogen fuel; controlling a ratio of the pure oxygen to the low nitrogen fuel; and combusting tangentially in the pure oxygen in a combustion chamber, so as to realize deep burnout of the low nitrogen fuel and decrease CO and NOx emission concentrations. The present invention realizes nitrogen source reduction before combustion, reduces NOx emissions, and increases a thermal energy conversion efficiency of the fuel, without a flue gas de-nitrification device. Therefore, a NOx emission concentration is 5-100 mg/m3, a CO emission concentration is 50-500 mg/m3, and a combustion efficiency of the fuel is beyond 95%.
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公开(公告)号：US09499440B2
公开(公告)日：2016-11-22
申请号：US14419255
申请日：2014-03-13
Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
Inventor： De an Pan , Shen gen Zhang , Ling jie Li , Bin Guo , Bo Liu
CPC classification number: C04B28/085 , C01F11/46 , C04B5/00 , C04B12/005 , C04B14/22 , C04B18/0445 , C04B18/0472 , C04B28/008 , C22B7/04 , C22C11/00 , Y02P40/165 , Y02W30/91 , Y02W30/94 , Y02W30/95 , C04B12/04 , C04B18/14 , C04B22/062 , C04B18/167
Abstract: An amount-reduction, harmless, disposal method for heavy metal waste gypsum (HMWG), which belongs to the technical fields of recycling economy and environmental protection. The HMWG used as raw material is subjected to processes of smelting fluxpreparation, lead smelting, fuming, and geopolymeric gelling, to realize amount-reduction, harmless and resources recycling utilization of heavy metal waste gypsum. The smoke containing sulfur dioxide produced in the smelting process is sent to the acid making system, and the produced dust with heavy metal is sent to the dedicated system for heavy mental disposing. The smoke dust produced in the fuming process is returned to the lead smelting system. The secondary HMWG produced in the acid making system would be returned to the preparation process of smelting flux. And the final products would be sulfuric acid and geopolymer material.
Abstract translation: 重金属废石膏（HMWG）的减量，无害化处置方法属于循环经济和环保技术领域。 用作原料的HMWG进行冶炼助熔，铅冶炼，发烟和地质聚合胶凝的工艺，实现重金属废石膏的减量，无害化和资源循环利用。 将冶炼过程中产生的含二氧化硫的烟气送至制酸系统，将重金属产生的粉尘送至专用系统进行重心处理。 在发烟过程中产生的烟尘返回到铅冶炼系统。 在制酸系统中生产的次级HMWG将返回到熔炼焊剂的制备过程。 最终产品将是硫酸和地质聚合物材料。
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公开(公告)号：US20190144972A1
公开(公告)日：2019-05-16
申请号：US16246991
申请日：2019-01-14
Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
Inventor： Shengen Zhang , Bo Liu , Xueying Lan
Abstract: A method for controlling a microstructure of a recycled aluminum alloy includes steps of: degassing and removing inclusions from the molten aluminum alloy, refining grains and controlling the deformed microstructure. Good microstructures of the deformed aluminum alloy can be obtained after degassing by gas flushing, removing the inclusions by filtering, refining the grains by adding a modifier, and extruding or rolling or forging. The present invention provides desirable results of degassing and impurity removal. Contents of hydrogen and inclusions in the refined recycled molten aluminum alloy are 0.02-0.26 ml/100 g Al and 0.4-0.7 area % metallographic field respectively.In an aluminum alloy billet, an average grain size is 25-50 μm and a short rod-shaped or elliptical second phase is 10-100 nm. In the deformed aluminum alloy, a grain aspect ratio is 10:1-100:1 and short rod-shaped or elliptical particles are 5-80 nm.
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公开(公告)号：US20210333018A1
公开(公告)日：2021-10-28
申请号：US16335676
申请日：2017-11-30
Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
Inventor： Shengen Zhang , Bolin Zhang , Bo Liu , Lin Li
Abstract: A double chambers boiler system with oxygen-enriched combustion is provided, relating to fields of thermal power engineering and mechanical manufacturing. The double chambers boiler system includes a boiler furnace subassembly and a combustion control subassembly. The boiler furnace subassembly includes a combustion chamber and a heat exchange chamber. The heat exchange chamber is arranged above the combustion chamber. A high temperature flue gas outlet is arranged between the combustion chamber and the heat exchange chamber. The combustion control subassembly includes a burner, a pure oxygen injector and a fuel injector. The double chambers boiler system with oxygen-enriched combustion is able to simultaneously solve problems of improving a combustion efficiency and reducing an emission concentration of NOx.
