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1.发明授权公开(公告)号：US12054673B2
公开(公告)日：2024-08-06
申请号：US16333591
申请日：2018-05-28
Applicant: Beijing University of Technology
Inventor： Dean Pan , Yufeng Wu , Tieyong Zuo
CPC classification number: C10B53/00 , B03C1/30 , B09B3/40 , C10G1/00 , C22B1/005 , C22B7/001 , C22B7/005 , B03C2201/20 , B09B2101/17 , C10G2300/1003
Abstract: A green resource-based method of thermal mass synergy in waste Integrated circuit board mainly includes carbonization cracking system, crushing and separation system, gasification cracking system and heat value utilization and comprehensive recovery system. Compared with existing techniques, carbonization cracking system can realize the dry distillation cracking of organic matter in waste integrated circuit board which converts carbon, hydrogen and other elements into fuel carbonized cracking gas and cracking oil, the heat from the combustion of the carbonization cracking gas of the invention provides the energy needed for the carbonization cracking to realize self-heating carbonization cracking. Carbonization cracking products are cracked and separated to solve the problems such as hard to break and organic coating metal caused by direct crushing and separation of traditional circuit boards which Improves crushing and separation effect; gasification cracking system achieves the comprehensive utilization of carbon, the gasified cracking gas can be used as a heat source for subsequent valuable metal recovery to further improve the utilization rate of calorific value. The invention has the characteristics of: high heat value utilization rate, low energy consumption, high metal recovery rate, short process recovery of valuable metal and no pollution of flue gas.
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2.发明申请公开(公告)号：US20220119714A1
公开(公告)日：2022-04-21
申请号：US16333591
申请日：2018-05-28
Applicant: Beijing University of Technology
Inventor： Dean Pan , Yufeng Wu , Tieyong Zuo
Abstract: A green resource-based method of thermal mass synergy in waste Integrated circuit board mainly includes carbonization cracking system, crushing and separation system, gasification cracking system and heat value utilization and comprehensive recovery system. Compared with existing techniques, carbonization cracking system can realize the dry distillation cracking of organic matter in waste integrated circuit board which converts carbon, hydrogen and other elements into fuel carbonized cracking gas and cracking oil, the heat from the combustion of the carbonization cracking gas of the invention provides the energy needed for the carbonization cracking to realize self-heating carbonization cracking. Carbonization cracking products are cracked and separated to solve the problems such as hard to break and organic coating metal caused by direct crushing and separation of traditional circuit boards which Improves crushing and separation effect; gasification cracking system achieves the comprehensive utilization of carbon, the gasified cracking gas can be used as a heat source for subsequent valuable metal recovery to further improve the utilization rate of calorific value. The invention has the characteristics of: high heat value utilization rate, low energy consumption, high metal recovery rate, short process recovery of valuable metal and no pollution of flue gas.
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公开(公告)号：US20210324496A1
公开(公告)日：2021-10-21
申请号：US16342531
申请日：2018-12-21
Applicant: Beijing University of Technology
Abstract: The invention relates to the field of comprehensive recovery of valuable elements such as bromine, base metal and precious metal from incineration ash, especially relates to a method for enriching precious metals from printed circuit board incineration ash by bath smelting-chlorination circulation process. The process mainly comprises pretreatment of the printed circuit board Incineration ash and circulation-chlorination enrichment process for precious metals. The crude copper, crude zinc sulfate, bromine, lead chloride and precious metal enriched slag are obtained. Compared with the traditional process, it realizes the cycle enrichment of precious metals as well as avoids the loss of valuable metals and secondary pollution caused by tail liquid discharge.
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公开(公告)号：US11447845B2
公开(公告)日：2022-09-20
申请号：US16342531
申请日：2018-12-21
Applicant: Beijing University of Technology
Abstract: The invention relates to the field of comprehensive recovery of valuable elements such as bromine, base metal and precious metal from incineration ash, especially relates to a method for enriching precious metals from printed circuit board incineration ash by bath smelting-chlorination circulation process. The process mainly comprises pretreatment of the printed circuit board Incineration ash and circulation-chlorination enrichment process for precious metals. The crude copper, crude zinc sulfate, bromine, lead chloride and precious metal enriched slag are obtained. Compared with the traditional process, it realizes the cycle enrichment of precious metals as well as avoids the loss of valuable metals and secondary pollution caused by tail liquid discharge.
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5.发明申请公开(公告)号：US20220205063A1
公开(公告)日：2022-06-30
申请号：US17609277
申请日：2019-07-17
Applicant: Beijing University of Technology
Abstract: The invention relates to a method for multi-metal products recovery from pyrolytic waste integrated circuit boards. The method mainly comprises the steps of smelting and blending, atomization, acidolysis and filtration, noble metal recycling, copper extraction and back extraction, nickel extraction and back extraction. Compared with the prior art, the method has the advantages that smoke pollution and the smelting slag treatment in the process of preparing a black copper ingot through multi-metal collaborative smelting are reduced, and the problems of low anode efficiency of the black copper electrolysis process are solved. Meanwhile, the high-temperature high-oxygen atomized gas generated in the atomizing process provides a heat source and an oxygen source for subsequent acidolysis, so that the energy consumption is further reduced. The method has the advantages such as short process, remarkable energy conservation and emission reduction.
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Patent Agency Ranking
公开(公告)号：US10954125B2
公开(公告)日：2021-03-23
申请号：US16485141
申请日：2019-01-15
Applicant: BEIJING UNIVERSITY OF TECHNOLOGY
Abstract: A method of recovering bromide from bromine-containing smelting ash relates to the field of high efficient separation and recovery of bromine by total wet method. It especially relates to the method of high efficiency separation of bromine salt and lead, zinc recovery of circuit board smelting ash by two-step method. It mainly comprising: sub-molten salt leaching, washing, separate Lead and zinc by adjusting the pH of industrial sulfuric acid, membrane separation and concentration, reuse of water, crude bromine salt recovery by evaporation crystallization of bromine salt. Compared with the traditional baking and recycling process of ash, the invention adopts sodium hydroxide submolten salt leaching technology and membrane separation and concentration technology, to reduce the reaction temperature and tailings discharge greatly, which has a good effect of energy saving and emission reduction.
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公开(公告)号：US12006268B2
公开(公告)日：2024-06-11
申请号：US18500592
申请日：2023-11-02
Applicant: BEIJING UNIVERSITY OF TECHNOLOGY
Inventor： Dean Pan , Xiaoguang Zhang , Ruhao Kong , Qijun Zhang , Zhe Tan , Wei Wang
IPC: C04B38/00 , C04B35/00 , C04B35/19 , C04B35/34 , C04B35/622 , C04B35/626 , C04B38/10 , C04B41/00
CPC classification number: C04B38/10 , C04B35/19 , C04B35/62204 , C04B35/6261 , C04B35/62655 , C04B41/0072 , C04B2235/3472
Abstract: A method for preparing an ecological foamed ceramic from lepidolite filter mud whole waste belongs to the field of environmental protection and resource reuse. The ecological foamed ceramic with excellent properties can be prepared by using lepidolite filter mud as the main raw materials, including ball milling, homogenization, drying, material distribution, and heat treatment. The amount of lepidolite filter mud in the present invention accounts for more than 90%, which is a whole waste utilization and can achieve high-value utilization of bulk lepidolite filter mud. The present invention uses a composite foaming agent combined with a foaming technology and has the advantages of rapid foaming and controllable pore size compared with a single foaming agent. The ecological foamed ceramic prepared by the present invention meets the industrial standard of CJ/T 299-2008 “Artificial ceramic filter material for water treatment” and has potential application value in domestic sewage treatment.
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公开(公告)号：US20240076229A1
公开(公告)日：2024-03-07
申请号：US18389556
申请日：2023-11-14
Applicant: BEIJING UNIVERSITY OF TECHNOLOGY
Inventor： Yufeng WU , Xiaomin Liu , Dean Pan
CPC classification number: C03C10/0063 , C03B1/00 , C03B19/063 , C03B19/1045 , C03C1/002
Abstract: The invention discloses a method for preparing lead smelting slag glass-ceramics based on the oxidation of silicon-rich silicon smelting slag and composition adjustment, and belongs to the technical field of resource utilization of smelting slag rich in monatomic silicon. The method comprises the steps: mixing the silicon slag rich in monatomic silicon with an oxidant, a fluxing agent and a clarifying agent according to a formula ratio, ball-milling and screening to obtain a tempering raw material with uniform size, and performing high-temperature oxidation melting on the tempering raw material to form an oxidation-state molten tempering material; and carrying out further mixed melting on the molten tempering material and hot lead slag, carrying out water quenching to obtain basic glass, and carrying out heat treatment system on the obtained basic glass to form the glass ceramics. According to the method, the smelting slag rich in monatomic silicon is subjected to oxidation tempering and mixed melting with the hot lead slag to prepare the basic glass, and the glass ceramics are obtained by regulating and controlling the heat treatment system of the basic glass. The method is simple in technological process, high in production efficiency and low in cost, achieves the collaborative high-value conversion target of the silicon-rich silicon slag and the lead slag, and is easy to industrially popularize and apply.
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公开(公告)号：US11858822B2
公开(公告)日：2024-01-02
申请号：US16627721
申请日：2019-01-15
Applicant: BEIJING UNIVERSITY OF TECHNOLOGY
CPC classification number: C01B7/096 , C01G9/06 , C01G21/20 , C22B7/008 , C22B7/02 , C22B13/045 , C22B19/24
Abstract: The invention relates to the field of efficient separation and recovery of bromine by full wet method, especially to a two-step separating method of bromide and recovery of lead and zinc from printed circuit board Incineration ash. It mainly includes first sodium hydroxide alkaline leaching, secondary sodium peroxide alkaline leaching, pH adjustment, separate lead and zinc, bromide evaporation and crystallization to recover crude bromide and other steps. Compared with traditional comprehensive recovery process of ash, the invention uses sodium hydroxide to dissolve bromide, lead and zinc, and uses the strong oxidation of sodium peroxide in alkaline environment, copper bromide and other bromine are oxidized and leached; through two-step method, the efficient leaching of bromine, lead and zinc is realized, silver and other precious metals are enriched at the same time. It is beneficial to subsequent recovery of precious metals and has the characteristics of short tail liquid discharge.
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公开(公告)号：US11198615B2
公开(公告)日：2021-12-14
申请号：US16348506
申请日：2018-12-21
Applicant: Beijing University of Technology
Inventor： Yufeng Wu , Dean Pan , Bin Li , Tieyong Zuo
IPC: C01G3/00 , C01G3/10 , C01G9/06 , C01G21/20 , C22B7/00 , C22B7/04 , C22B3/00 , C22B15/00 , C22B19/30
Abstract: A method of pretreatment and bromine recovery of PCB Incineration ash is disclosed that relates to the field of comprehensive recovery of valuable metals by full wet method, especially relates to a method of valuable metals and bromine recovery, precious metals enrichment in pretreatment process of PCB Incineration ash. The major steps includes alkali leaching, Cu extraction back-extraction, neutralization-precipitation to separate, Bromine evaporative crystallization, regeneration, acid pickling, Zn evaporative crystallization, removal of Zn and Cu. Compared with the traditional comprehensive recovery process of ash, the invention can separate bromine from ash and recover valuable metals such as copper, zinc and lead with the maximum extent, at the same time, the enrichment of silver and other precious metals is beneficial to the subsequent recovery of precious metals. It has high added recovery value and no tailless discharge.
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