Physicochemical Problems of Mineral Processing最新文献_第3页

Effect and mechanism on the flotation desulfurization of high-sulfur bauxite by using the mixed collector of PYDH PYDH混合捕收剂对高硫铝土矿浮选脱硫的影响及机理

Physicochemical Problems of Mineral Processing Pub Date : 2024-02-08 DOI: 10.37190/ppmp/183812

Han Li, Qin Zhang

{"title":"Effect and mechanism on the flotation desulfurization of high-sulfur bauxite by using the mixed collector of PYDH","authors":"Han Li, Qin Zhang","doi":"10.37190/ppmp/183812","DOIUrl":"https://doi.org/10.37190/ppmp/183812","url":null,"abstract":"Desulfurization of high sulfur bauxite is an important issue in Bayer alumina production. In this study, by using two anionic sulphydryl collectors (HX, HD) as mixed collectors (PYDH), the selectivity of flotation separation between pyrite and diaspore was improved, thereby reducing the sulfur content of high sulfur bauxite and ultimately meeting the production requirements of Bayer alumina. The findings showed that under the optimized conditions of 500 g/Mg collector, 150 g/Mg inhibitor, 200 g/Mg activator, 100 g/Mg foaming agent, and a slurry pH of 9, the sulfur content of bauxite can be reduced from 3.35% to 0.33% through one rough selection, one fine selection, and one scavenging flotation. Moreover, the interaction mechanism between mixed collectors and pyrite was studied through scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Zeta potential analysis, and contact angle testing. SEM-EDS research confirmed that PYDH adsorbed on the surface of pyrite. The contact angle measurement analysis showed that compared to individual collectors, pretreated pyrite with mixed collectors had better hydrophobicity. Zeta potential, FTIR, and XPS results indicated that PYDH selectively adsorbed pyrite through chemical adsorption. The mixed collector PYDH is an effective collector for pyrite in high sulfur bauxite flotation desulfurization.","PeriodicalId":508651,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":"52 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139853151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect and mechanism on the flotation desulfurization of high-sulfur bauxite by using the mixed collector of PYDH PYDH混合捕收剂对高硫铝土矿浮选脱硫的影响及机理

Physicochemical Problems of Mineral Processing Pub Date : 2024-02-08 DOI: 10.37190/ppmp/183812

Han Li, Qin Zhang

{"title":"Effect and mechanism on the flotation desulfurization of high-sulfur bauxite by using the mixed collector of PYDH","authors":"Han Li, Qin Zhang","doi":"10.37190/ppmp/183812","DOIUrl":"https://doi.org/10.37190/ppmp/183812","url":null,"abstract":"Desulfurization of high sulfur bauxite is an important issue in Bayer alumina production. In this study, by using two anionic sulphydryl collectors (HX, HD) as mixed collectors (PYDH), the selectivity of flotation separation between pyrite and diaspore was improved, thereby reducing the sulfur content of high sulfur bauxite and ultimately meeting the production requirements of Bayer alumina. The findings showed that under the optimized conditions of 500 g/Mg collector, 150 g/Mg inhibitor, 200 g/Mg activator, 100 g/Mg foaming agent, and a slurry pH of 9, the sulfur content of bauxite can be reduced from 3.35% to 0.33% through one rough selection, one fine selection, and one scavenging flotation. Moreover, the interaction mechanism between mixed collectors and pyrite was studied through scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Zeta potential analysis, and contact angle testing. SEM-EDS research confirmed that PYDH adsorbed on the surface of pyrite. The contact angle measurement analysis showed that compared to individual collectors, pretreated pyrite with mixed collectors had better hydrophobicity. Zeta potential, FTIR, and XPS results indicated that PYDH selectively adsorbed pyrite through chemical adsorption. The mixed collector PYDH is an effective collector for pyrite in high sulfur bauxite flotation desulfurization.","PeriodicalId":508651,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":" 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139793336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Role of maceral groups in coal beneficiation: A short review 大型矿物群在煤炭选矿中的作用：简评

Physicochemical Problems of Mineral Processing Pub Date : 2024-02-07 DOI: 10.37190/ppmp/183765

An Ping, Xinran Liu, W. Xia, Yao-li Peng, Guang-yuan Xie

引用次数: 0

Role of maceral groups in coal beneficiation: A short review 大型矿物群在煤炭选矿中的作用：简评

Physicochemical Problems of Mineral Processing Pub Date : 2024-02-07 DOI: 10.37190/ppmp/183765

An Ping, Xinran Liu, W. Xia, Yao-li Peng, Guang-yuan Xie

引用次数: 0

Innovative correlation relating the destruction of graphite flakes to the morphology characteristics of minerals 石墨片破坏与矿物形态特征之间的创新关联

Physicochemical Problems of Mineral Processing Pub Date : 2024-02-04 DOI: 10.37190/ppmp/183655

N. Wang, Xinyang Xu, Yanxin Jiang, Zhi-tao Yuan, Jiwei Lu, Lixia Li, Qingyou Meng

引用次数: 0

Innovative correlation relating the destruction of graphite flakes to the morphology characteristics of minerals 石墨片破坏与矿物形态特征之间的创新关联

Physicochemical Problems of Mineral Processing Pub Date : 2024-02-04 DOI: 10.37190/ppmp/183655

N. Wang, Xinyang Xu, Yanxin Jiang, Zhi-tao Yuan, Jiwei Lu, Lixia Li, Qingyou Meng

引用次数: 0

Gravity-based pre-concentration strategies for complex rare earth ore containing niobium and zirconium 基于重力的含铌和锆复杂稀土矿预选策略

Physicochemical Problems of Mineral Processing Pub Date : 2024-02-02 DOI: 10.37190/ppmp/183609

Mingliang Zhou, Lixia Li, Feifei Liu, Zhichao Liu, Naci Emre Altun, Zhi-tao Yuan, Jiongtian Liu

{"title":"Gravity-based pre-concentration strategies for complex rare earth ore containing niobium and zirconium","authors":"Mingliang Zhou, Lixia Li, Feifei Liu, Zhichao Liu, Naci Emre Altun, Zhi-tao Yuan, Jiongtian Liu","doi":"10.37190/ppmp/183609","DOIUrl":"https://doi.org/10.37190/ppmp/183609","url":null,"abstract":"The Balzhe rare earth mine, renowned for its rich reservoirs of niobium, zirconium, and rare earth elements, poses a unique challenge due to its diverse and interbedded mineral composition. Despite the abundance of these elements, their valuable grade remains notably low, falling short of economic thresholds. To this end, pre-concentration of valuable minerals to discard gangue minerals before flotation would be an economical option. In response, this study delves into the feasibility of gravity-induced pre-concentration, aiming to segregate valuable minerals from gangue for subsequent flotation processes. Conducting float-and-sink tests on varied particle sizes (-2+0.5 mm, -0.5+0.074 mm, and -0.074+0.02 mm) within heavy liquids of specific gravities (ranging from 2.55 to 2.85), the study reveals the effectiveness of gravity separation. Notably, particles sized -2+0.5 mm and -0.074+0.02 mm demonstrated superior separation performance over the -0.5+0.074 mm fraction. Comparative analysis of diverse gravity separation equipment unveiled compelling results. The dense medium cyclone separator showcased impressive recovery rates and high-grade concentrates of Nb2O5, ZrO2, and total rare earth oxides (TREO) at 0.34%, 8.20%, and 0.41%, respectively, surpassing the sand table's performance for -2+0.5 mm particles. Conversely, for -0.5+0.074 mm particles, the shaking table exhibited optimal separation efficiency, yielding grades of Nb2O5, ZrO2, and TREO at 0.37%, 4.08%, and 0.44%, with substantial recovery values. Ultimately, the Knelson centrifugal separator proved most effective for -0.074+0.02 mm particles, yielding notable grades and recoveries of Nb2O5, ZrO2, and TREO. This study underscores the promising potential of gravity-induced pre-concentration techniques for enhancing the recovery of valuable elements from the complex Balzhe rare earth ore, offering critical insights into optimizing mineral extraction processes.","PeriodicalId":508651,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":"15 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139869350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Current status of research on nanobubbles in particle flotation 颗粒浮选中的纳米气泡研究现状

Physicochemical Problems of Mineral Processing Pub Date : 2024-02-02 DOI: 10.37190/ppmp/183613

Jian Chen, Jun Chen, Yali Cheng

{"title":"Current status of research on nanobubbles in particle flotation","authors":"Jian Chen, Jun Chen, Yali Cheng","doi":"10.37190/ppmp/183613","DOIUrl":"https://doi.org/10.37190/ppmp/183613","url":null,"abstract":"Froth flotation, as one of the most widely used separation approaches in mineral processing, is commonly used to recover valuable components from minerals. However, maintaining high flotation efficiencies is a serious challenge for conventional froth flotation in the face of decreasing particle size of the minerals to be sorted. To date, there have been plenty of reports on the software of nano-bubbles (NBS) in flotation, and the experimental consequences show that nano-bubbles' introduction has given rise to improvement's different grades in the recovery of varieties of minerals, which highlights the great potential of nano-bubbles for mineral flotation. Nanobubbles have smaller bubble radii and unusually high stability compared to conventional flotation bubbles, and their related behavior in flotation has been a hot research topic. This paper reviews some of the methods of preparing nanobubbles, equipment techniques for characterizing nanobubbles, factors affecting their stability, and some of the popular doctrines. In particular, the reinforcing mechanism of nanobubbles in the particle flotation process is discussed, first, the nanobubbles improve the electrostatic attractiveness with the particles by achieving the charge inversion while the nanobubbles that was adsorbed on the particles' surface will cover a share of the charge, which decreases the electrostatic repulsive force between the particles; and second, the nanobubbles can act as a bridge between the surfaces of the two particles, which advances the agglomeration between the particles. This review aims to be able to further advance the research related to the industrialization of nanobubbles.","PeriodicalId":508651,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":"66 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139810884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coupling effect between magnetic wires and its influence on high gradient magnetic separation performance 磁力线之间的耦合效应及其对高梯度磁分离性能的影响

Physicochemical Problems of Mineral Processing Pub Date : 2024-02-02 DOI: 10.37190/ppmp/183620

Yaxiong Jiang, Jianwu Zeng, Mengbing Cao, Weijun Yu, Enlong Xie, Luzheng Chen

{"title":"Coupling effect between magnetic wires and its influence on high gradient magnetic separation performance","authors":"Yaxiong Jiang, Jianwu Zeng, Mengbing Cao, Weijun Yu, Enlong Xie, Luzheng Chen","doi":"10.37190/ppmp/183620","DOIUrl":"https://doi.org/10.37190/ppmp/183620","url":null,"abstract":"High gradient magnetic separation (HGMS) is effective for the separation of weakly magnetic minerals, and this method is achieved through the use of matrix, which is made of huge numbers of rod wires. So that the coupling effect of magnetic field and flow field between wires has a marked effect on the HGMS performance. In the investigation, the coupling effect between magnetic wires and its influence on high gradient magnetic separation performance were theoretically described and simulated using COMSOL Multiphysics. It is found that the magnetic field round a wire would be affected by the neighboring wires, and then a coupling effect of magnetic field between wires was produced, increasing the magnetic induction intensity on the upstream and downstream of wire surface. And the coupling effect of flow field could increase the slurry velocity at the regions of the wire surface with azimuth angles of 0° and 90°, which is beneficial for the selective capture of wire. These simulated results were basically validated with the experimental separation, using an innovative Magnetic Capture Analysis Method. It is found that the wire spacing has significant effect on the coupling effect of magnetic wires, and a critical spacing for wires could achieve an excellent coupling effect, which is beneficial for the improvement of HGMS performance. This investigation contributes to improve HGMS performance in concentrating fine weakly magnetic ores.","PeriodicalId":508651,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139809843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coupling effect between magnetic wires and its influence on high gradient magnetic separation performance 磁力线之间的耦合效应及其对高梯度磁分离性能的影响

Physicochemical Problems of Mineral Processing Pub Date : 2024-02-02 DOI: 10.37190/ppmp/183620

Yaxiong Jiang, Jianwu Zeng, Mengbing Cao, Weijun Yu, Enlong Xie, Luzheng Chen

{"title":"Coupling effect between magnetic wires and its influence on high gradient magnetic separation performance","authors":"Yaxiong Jiang, Jianwu Zeng, Mengbing Cao, Weijun Yu, Enlong Xie, Luzheng Chen","doi":"10.37190/ppmp/183620","DOIUrl":"https://doi.org/10.37190/ppmp/183620","url":null,"abstract":"High gradient magnetic separation (HGMS) is effective for the separation of weakly magnetic minerals, and this method is achieved through the use of matrix, which is made of huge numbers of rod wires. So that the coupling effect of magnetic field and flow field between wires has a marked effect on the HGMS performance. In the investigation, the coupling effect between magnetic wires and its influence on high gradient magnetic separation performance were theoretically described and simulated using COMSOL Multiphysics. It is found that the magnetic field round a wire would be affected by the neighboring wires, and then a coupling effect of magnetic field between wires was produced, increasing the magnetic induction intensity on the upstream and downstream of wire surface. And the coupling effect of flow field could increase the slurry velocity at the regions of the wire surface with azimuth angles of 0° and 90°, which is beneficial for the selective capture of wire. These simulated results were basically validated with the experimental separation, using an innovative Magnetic Capture Analysis Method. It is found that the wire spacing has significant effect on the coupling effect of magnetic wires, and a critical spacing for wires could achieve an excellent coupling effect, which is beneficial for the improvement of HGMS performance. This investigation contributes to improve HGMS performance in concentrating fine weakly magnetic ores.","PeriodicalId":508651,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":"39 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139869692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0