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公开(公告)号：US11773025B2
公开(公告)日：2023-10-03
申请号：US17964973
申请日：2022-10-13
Applicant: University of Science and Technology Beijing
Inventor： Yanling Zhang , Zheng Zhao , Weifeng Zhang , Kan Yu , Yao Zhang
IPC: C04B35/26
CPC classification number: C04B35/2633 , C04B35/2683 , C04B2235/3208 , C04B2235/3274 , C04B2235/6583
Abstract: Provided is a red mud-based composite calcium ferrite and a preparation method and use thereof. The preparation method of the red mud-based composite calcium ferrite includes the following steps: mixing red mud and a calcium source, and roasting an obtained mixture in an oxygen-containing atmosphere to obtain the red mud-based composite calcium ferrite; where the calcium source is selected from the group consisting of lime and calcium carbonate. In the present disclosure, the composite calcium ferrite is prepared using a solid waste red mud, with a greatly reduced cost of raw materials; on the other hand, compared with traditional calcium ferrite, the composite calcium ferrite mainly has phase structures of CaFe2O4, Ca2FeAlO5, and Ca2Fe2O5. Therefore, the composite calcium ferrite has a lower melting point, a higher lime dissolution efficiency, and better fluxing and dephosphorization effects during primary smelting and refining of molten steel, and has broad prospects for use in industry.
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22.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：US11648608B1
公开(公告)日：2023-05-16
申请号：US17897257
申请日：2022-08-29
Applicant: University of Science and Technology Beijing
Inventor： Qing Liu , Leilei Zou , Jiangshan Zhang , Huisheng Wang , Biao Tao
CPC classification number: B22D11/225 , B22D11/001 , C21D6/02
Abstract: A secondary cooling control method for reinforcing surface solidification structure of microalloyed steel continuous casting bloom includes: in situ observing precipitation behavior of secondary phase particles of the microalloyed steel, and determining a concentrated precipitation temperature range; cooling the microalloyed steel at different cooling rates, obtaining a particle size and a volume fraction of the secondary phase particles of the microalloyed steel at different cooling rates; determining an optimal average cooling rate; determining an optimal average cooling rate r; determining an optimal average cooling rate; and determining an optimal average cooling rate range through intersection of the three optimal average cooling rates whereby the continuous casting secondary cooling is optimized. The present invention can enhance the surface solidification structure of continuous casting bloom and reduce surface and subsurface cracks of the microalloyed steel continuous casting bloom.
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24.发明授权公开(公告)号：US11567230B1
公开(公告)日：2023-01-31
申请号：US17679137
申请日：2022-02-24
Applicant: University of Science and Technology Beijing
Inventor： Dazhao Song , Xueqiu He , Menghan Wei
Abstract: A direction-finding and positioning system of electromagnetic emission of coal or rock fracture includes a three-axis electromagnetic sensor array, a signal acquisition module and a direction-finding and positioning terminal; the three-axis electromagnetic sensor array is composed of at least four three-axis electromagnetic sensors configured to synchronously sense magnetic field strength in three-axis direction based on a tunnel magneto resistance technology, and obtain a real magnetic field vector in space by measuring; the signal acquisition module is configured to acquire magnetic field vector variable information of multiple measuring points in real-time, and after extracting magnetic field vector variable parameters, transmitting the magnetic field vector variable parameters to the direction-finding and positioning terminal; the direction-finding and positioning terminal is configured to perform direction-finding and positioning calculations according to the magnetic field vector variable parameters received, and performing a three-dimensional dynamic visual display to positioning results, positioning time, and positioning coordinates.
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公开(公告)号：US20220325368A1
公开(公告)日：2022-10-13
申请号：US17440648
申请日：2020-08-11
Applicant: University of Science and Technology Beijing
Inventor： Rong ZHU , Weifeng LI , Guangsheng WEI , Chao FENG , Kai DONG , Runzao LIU , Yun ZHOU , Qiang RUAN , Guoli WEI , Deyong WANG , Qingde ZHU , Zhiguo HAN
Abstract: There is provided a method of dynamic control for a bottom blowing O2—CO2—CaO converter steelmaking process. In the process, O2 is adopted as a top blowing gas, a mixed gas O2+CO2 is adopted as a bottom blowing carrier gas to inject lime powders into the converter from a bottom blowing tuyere. The ingredients of the molten steel in the converter steelmaking process are predicted based on the conservation of matter, in combination with the ingredient data of charged molten iron, the ingredient data of the converter gas in the converter blowing process, and working conditions of the bottom blowing device. The top blowing oxygen amount, the bottom blowing gas ratio and the flow rate of lime powder are dynamically adjusted stage by stage according to requirements for target ingredients at the end point of blowing.
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Patent Agency Ranking
公开(公告)号：US11371344B2
公开(公告)日：2022-06-28
申请号：US16620657
申请日：2018-09-21
Applicant: University of Science and Technology Beijing
Inventor： Weiyao Zhu , Zhiyong Song , Ming Yue , Yunfeng Liu , Zhen Chen , Dongxu Ma , Wenchao Liu , Qian Qi
Abstract: A method for identifying a medium structure coupling and a fracture network morphology of a shale gas reservoir includes the following steps. Firstly, performing a fracturing test on shale cores by using a modified Brazilian disc test and categorizing the fracture network morphology. Secondly, performing a shale matrix-fracture structure and stress sensitivity test on the shale cores having different fracture network morphology. After that, determining a stress sensitivity constant of different fracture network morphology according to indoor core data and finally preparing an identification chart of the fracture network morphology based on an indoor core stress sensitivity test combined with a production practice. The identification chart can be applied to an actual fracturing well, and the fracture network morphology is directly identified by a real-time effective stress and a normalized flow.
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公开(公告)号：US20220140961A1
公开(公告)日：2022-05-05
申请号：US17138949
申请日：2020-12-31
Applicant: University of Science and Technology Beijing
Inventor： Haijun ZHANG , Xiangnan LIU , Keping LONG
Abstract: A bandwidth part (BWP) and power scheduling method and apparatus for indoor terahertz are provided. The BWP and power scheduling method uses an intelligent reflecting surface (IRS) and a non-orthogonal multiple access (NOMA) to compensate for a shortcoming, wherein terahertz waves are not suitable for an indoor transmission, convert an indoor environment of an IRS-assisted terahertz propagation into a channel model, and convert an optimal wireless resource scheduling in an indoor IRS-assisted terahertz system into a functional optimization design with random constraints. Policies and corresponding actions are trained by using a proximal policy optimization (PPO) to schedule a power and a BWP. An actor part generates continuous a power scheduling, and a critic part generates a discrete BWP scheduling.
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公开(公告)号：US11286192B2
公开(公告)日：2022-03-29
申请号：US16824659
申请日：2020-03-19
Applicant: University of Science and Technology Beijing , Shengshi Weilan (Shandong) Environmental Science & Technology Co., Ltd.
Inventor： Yi Xing , Chen Hong , Yanxiao Si , Wei Su , Bo Jiang
Abstract: The present invention discloses a high-moisture sludge ultra-fine synchronizing deep-drying device and a method thereof. The device has a sludge ultrafine pulverizing unit and a sludge drying unit arranged horizontally in parallel, and a pulverized sludge discharge port arranged between them. The sludge ultrafine pulverizing unit comprises a sludge pulverizing chamber and a sludge feeding port, and the sludge pulverizing chamber is a hollow cylindrical structure with a pulverizing rotation shaft arranged in the center, and the pulverizing rotation shaft is provided with a sludge pulverizing impeller. The lower part of the sludge feeding port is provided with a first baffle and/or a second deflector. The sludge is pulverized into sludge powders in the sludge pulverizing chamber, and then fed into the sludge drying chamber to be fluidized and dried. The present invention has the advantage of high drying efficiency, etc.
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公开(公告)号：US11180863B2
公开(公告)日：2021-11-23
申请号：US16612739
申请日：2019-03-27
Inventor： Shuqiang Jiao , Zhe Wang , Handong Jiao
Abstract: A device and a method for preparing pure titanium by electrolysis-chlorination-electrolysis, wherein the device includes a first electrolytic cell, a second electrolytic cell, a chlorination reactor and guide tubes. The Cl2 generated at the anode of the first electrolytic cell is introduced into a chlorination reactor containing the TiCxOy or TiCxOyNz raw materials via a guide tube, and a chlorination is carried out to generate TiCl4 gas at a temperature of 200° C.-600° C. The TiCl4 gas passes through a guide tube into a cathode of the second electrolytic cell, and then an electrolysis is performed to obtain the high-purity titanium in the second electrolytic cell. At the same time, the Cl2 generated at the anode of the second electrolytic cell is recycled into the chlorination reactor in the first electrolytic cell to continue to participate in the chlorination of TiCxOy or TiCxOyNz.
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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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