公开(公告)号：US20210197264A1

公开(公告)日：2021-07-01

申请号：US17200475

申请日：2021-03-12

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

Inventor： Gang CHEN ,  Mingli QIN ,  Qiying TAO ,  Xuanhui QU

IPC: B22F9/04 ,  B33Y70/00 ,  B01J2/16 ,  B22F1/00

Abstract: A method of preparation of titanium and titanium alloy powder for 3D printing is based on a fluidized bed jet milling technique. Hydride-dehydrate titanium powder and titanium alloy powder are used as main raw material powder, jet milling and shaping are carried out in shielding atmosphere of nitrogen or argon, and finally high-performance titanium and titanium alloy powder meeting the requirements of 3D printing process is obtained. The titanium and titanium alloy powder prepared using this method has a narrow particle size distribution, approximately spherical shape, and controllable oxygen content.

公开(公告)号：US20210095360A1

公开(公告)日：2021-04-01

申请号：US16634909

申请日：2018-09-19

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING ,  BOEING (CHINA) CO., LTD.

Inventor： Shengen ZHANG ,  Bo LIU ,  Rui LIN

IPC: C22C1/02 ,  B22D21/00 ,  B22D43/00 ,  C22C1/03 ,  B22C9/08 ,  C22B21/00 ,  C22B21/06

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.

公开(公告)号：US10913110B2

公开(公告)日：2021-02-09

申请号：US16169570

申请日：2018-10-24

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

Inventor： Jingyuan Li ,  Mingfan Qi ,  Yulai Chen ,  Huiping Hong ,  Jianxin Xie

IPC: B22D11/16 ,  B22D25/06 ,  B22D11/114 ,  B29C67/00 ,  B22D11/10 ,  B33Y30/00 ,  B33Y10/00 ,  B33Y70/00 ,  B22D11/00 ,  B22D11/124 ,  B22D11/22 ,  B22D17/20 ,  B22D30/00 ,  C22C1/04

Abstract: An apparatus for a high-throughput screw caster of a multi-component gradient metal material from elongate materials, such as multi-component alloy pipes, rods, profiles, and other such materials, has in the lengthwise direction a continuous gradient distribution of chemical components. The apparatus includes an online powder flow-rate regulation system, a rotary feed system, a heating system, a heat insulation system, a motor drive system, a blank forming system and a control system.

公开(公告)号：US20210017051A1

公开(公告)日：2021-01-21

申请号：US16920643

申请日：2020-07-03

Applicant: University of Science and Technology Beijing ,  Beijing Mild Technology Co., Ltd.

Inventor： Suqin LI ,  Shuaishuai HAN ,  Xin ZHAO ,  Guohong XIONG

IPC: C02F1/48 ,  C02F1/52

Abstract: There is provided a method for controlling bio-slimes in a clean circulating water system through a physical-chemical-superconducting high gradient magnetic separation coupling process. An inorganic composite flocculant is added to circulating water to gather Zoogloea in the circulating water with micro-nano particles in hydrosol through demulsification to form alum floc. The resulting water passes through a superconducting high gradient magnetic separation system. A magnetic field strength of the superconducting high gradient magnetic separation system and flow rate of the circulating water are controlled to generate strong magnetic flocculation to allow floc to grow, such that the Zoogloea in the circulating water wraps the micro-nano particles to separate the Zoogloea from water.

公开(公告)号：US20210003005A1

公开(公告)日：2021-01-07

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

IPC: E21B49/02 ,  G01V99/00 ,  G01N3/08

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 text 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.

公开(公告)号：US20200377971A1

公开(公告)日：2020-12-03

申请号：US16576765

申请日：2019-09-20

Applicant: University of Science and Technology Beijing

Inventor： Chengyan WANG

IPC: C22B3/00

Abstract: A method for preparing lead directly from a lead-containing material by a solid phase reaction, includes: step 1, adding the lead-containing material to be processed to the grinder, and adding a metal substance and water to the grinder, wherein an activity of the metal substance is larger than that of lead; the solid phase reaction between the lead-containing material and the metal substance is caused directly by the grinder through a mechanical force to obtain a reaction product; step 2, washing and filtering the reaction product to obtain the lead and a metal salt solution corresponding to the metal substance; step 3, performing a melt casting on the lead to obtain a crude lead, crystallizing the metal salt solution to obtain a metal salt corresponding to the metal substance.

公开(公告)号：US10808290B2

公开(公告)日：2020-10-20

申请号：US16052629

申请日：2018-08-02

Applicant: University of Science and Technology Beijing

Inventor： Rong Zhu ,  Guangsheng Wei ,  Kai Dong ,  Jingxin Zhao ,  Xuetao Wu ,  Tianping Tang ,  Xueliang Wang ,  Wenhe Wu ,  Shaoyan Hu ,  Yun Wang

IPC: C21C7/10 ,  C21C7/064 ,  C21C5/52 ,  C21C7/00 ,  C21C7/072

Abstract: A clean and rapid smelting method in an electric arc furnace with full scrap steel, is suitable for smelting process of 30-300 t electric arc furnace with full scrap steel. In the smelting process of the electric arc furnace with full scrap steel, different kinds of mediums are injected by an injection lance which is installed inside refractory material of sidewall at the bottom of the electric arc furnace in different stages of smelting. Carburization is utilized in molten pool to accelerate melting down and improve carbon content of the molten pool at the stage of recarburizing and fluxing. A reaction in the molten pool is intensified at the stage of high efficiency dephosphorization and deep denitrogenation, to enhance efficient dephosphorization and deep denitrification of the reaction in the molten pool, thereby accelerating the smelting speed of the electric arc furnace with full scrap steel, improving effect of dephosphorization and denitrification.

公开(公告)号：US20190048430A1

公开(公告)日：2019-02-14

申请号：US16052629

申请日：2018-08-02

Applicant: University of Science and Technology Beijing

Inventor： Rong ZHU ,  Guangsheng WEI ,  Kai DONG ,  Jingxin ZHAO ,  Xuetao WU ,  Tianping TANG ,  Xueliang WANG ,  Wenhe WU ,  Shaoyan HU ,  Yun WANG

IPC: C21C7/064 ,  C21C7/00 ,  C21C7/072 ,  C21C5/52

CPC classification number: C21C7/0645 ,  C21C5/5264 ,  C21C7/0025 ,  C21C7/072 ,  C21C2005/5258 ,  Y02P10/143 ,  Y02P10/216

Abstract: A clean and rapid smelting method in an electric arc furnace with full scrap steel, is suitable for smelting process of 30˜300 t electric arc furnace with full scrap steel. In the smelting process of the electric arc furnace with full scrap steel, different kinds of medium is injected by an injection lance which is installed inside refractory material of sidewall at the bottom of the electric arc furnace in different stages of smelting; carburization is utilized in molten pool to accelerate melting down and improve carbon content of the molten pool at the stage of recarburizing and fluxing; reaction in the molten pool is intensified at the stage of high efficiency dephosphorization and deep denitrogenation, to enhance efficient dephosphorization and deep denitrification of the reaction in the molten pool, thereby accelerating the smelting speed of the electric arc furnace with full scrap steel, improving effect of dephosphorization and denitrification.

公开(公告)号：US20180187285A1

公开(公告)日：2018-07-05

申请号：US15690281

申请日：2017-08-30

Applicant: University of Science and Technology Beijing

Inventor： ZHANCHENG GUO ,  LONG MENG ,  LEI GUO ,  JINTAO GAO ,  YIWEI ZHONG ,  ZHE WANG ,  Kuiyuan CHEN

IPC: C22B11/02 ,  C22B7/04 ,  C22B7/00

CPC classification number: C22B11/025 ,  B01D2201/30 ,  B03B1/02 ,  C22B7/004 ,  C22B7/005 ,  C22B7/04 ,  C22B9/023 ,  C22B11/12 ,  Y02P10/214

Abstract: A method and apparatus for step-by-step retrieving valuable metals from waste printed circuit board particles. Many kinds of metals, most existing in form of elementary substance or alloy, are contained in the waste printed circuit boards. Molten metals are separated selectively by supergravity separation at different temperatures to achieve the step-by-step recovery. Tin-based alloys, lead-based alloy, zinc aluminum alloy, crude copper and precious-metal-enriched residues with different metal contents are separated out and collected on the condition of different temperatures (T=200˜300° C., 330˜430° C., 700˜900° C., 1100˜1300° C.) and controlling the gravity coefficient (G=50˜1000) and separation time (t=2˜20 min) etc. Different metals or alloys can be separated quickly and efficiently and the residue concentration of precious metals can be obtained. The process is simple and low cost to provide an efficient way to recovery the enrichment of valuable metals from electronic wastes.

公开(公告)号：US09796022B2

公开(公告)日：2017-10-24

申请号：US13587450

申请日：2012-08-16

Applicant: Shengen Zhang ,  Bo Liu ,  Jianjun Tian ,  Dean Pan ,  Bin Li

Inventor： Shengen Zhang ,  Bo Liu ,  Jianjun Tian ,  Dean Pan ,  Bin Li

IPC: B22F9/00 ,  B22F3/23 ,  B22F5/10 ,  B22F7/08 ,  B22F8/00

CPC classification number: B22F9/00 ,  B22F3/23 ,  B22F5/106 ,  B22F7/08 ,  B22F8/00 ,  Y02P10/24 ,  Y02W30/541

Abstract: The invention provides a pollution-free reuse method for iron-based grinding waste, involving the technology of recycling economy, with special reference to the metallurgical industry, iron-based grinding waste green recycling technology. The present invention of the iron grinding waste recycling and reuse methods includes degreasing, heat treatment, sieving, matching, and obtains iron-based alloyed powders, which can be used in SHS lined steel pipe, powder metallurgy structural component, magnetic grinding, thermal spray. More than 95% iron-based alloyed powders can be recycled from wide source of iron-based grinding waste. The invention has the advantage of low cost, no secondary pollution and wide application.