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

A review of the application of nanoparticles as collectors in ion flotation 纳米颗粒作为捕收剂在离子浮选中的应用综述

IF 1.5 4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-11-29 DOI: 10.37190/ppmp/176040

Arash Sobouti, Bahram Rezai, F. S. Hoseinian

引用次数: 0

The influence of air inlet layout on the inner flow field for a vertical turbo air classifier 进气口布局对立式涡轮空气分级机内部流场的影响

IF 1.5 4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-11-26 DOI: 10.37190/ppmp/175859

Yuan Yu, Xingshuai Li, Yu Zhang, Zhiwei Jiao, Jiaxiang Liu

引用次数: 0

An investigation into using benzohydroxamic acid as a collector for sulfide minerals 将苯羟肟酸用作硫化矿物收集剂的研究

IF 1.5 4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-11-26 DOI: 10.37190/ppmp/175662

S. Mohammadi-Jam, Ziyi Li, Neil Rose, Kristian E. Waters

{"title":"An investigation into using benzohydroxamic acid as a collector for sulfide minerals","authors":"S. Mohammadi-Jam, Ziyi Li, Neil Rose, Kristian E. Waters","doi":"10.37190/ppmp/175662","DOIUrl":"https://doi.org/10.37190/ppmp/175662","url":null,"abstract":"The mining industry aims to promote responsible chemical use during mineral processing operations to minimize the chemical contamination. Hydroxamic acids, which can form strong chelates with metals, have been shown to have less health and environmental issues when compared to xanthate collectors. In this work, the performance of benzohydroxamic acid (BHA) as a collector for galena, chalcopyrite, and quartz was evaluated. The minerals were conditioned with different concentrations (1.5, 3, and 4.5 kg/t) of collector at pHs 8, 9, and 10. The result showed that the treatment of the mineral surfaces with BHA enhanced the flotation recoveries of the sulfide minerals. High concentrations of benzohydroxamate anion, the protonic dissociation product of BHA, existed at basic pHs, where a chemical reaction between the anion and a metal cation on the mineral surface resulted in the adsorption of the collector onto the mineral surface. The microflotation results showed that the BHA collector was able to successfully recover galena and chalcopyrite. Their flotation recovery was dependent on the conditioning pH. Galena showed a high flotation recovery (up to 86%) at both pH 9 and 10, whereas chalcopyrite became most hydrophobic at pH values of 8 and 9 (up to 88%). None of the BHA concentrations or conditioning pHs was able to enhance quartz recovery beyond 7%. The research results have implications in the application of BHA for the froth flotation of galena and chalcopyrite.","PeriodicalId":20169,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139236079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of magnesium hydroxide by modifier-directed hydration and its effect on flame retardancy and mechanical properties of polypropylene 通过改性剂定向水合制备氢氧化镁及其对聚丙烯阻燃性和机械性能的影响

IF 1.5 4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-11-26 DOI: 10.37190/ppmp/175706

Mei Jia Wang, Li Mei Bai, MengTing Zhang, Yu Xin Ma, Liu Cheng Zhao, Shao Ying Li

{"title":"Preparation of magnesium hydroxide by modifier-directed hydration and its effect on flame retardancy and mechanical properties of polypropylene","authors":"Mei Jia Wang, Li Mei Bai, MengTing Zhang, Yu Xin Ma, Liu Cheng Zhao, Shao Ying Li","doi":"10.37190/ppmp/175706","DOIUrl":"https://doi.org/10.37190/ppmp/175706","url":null,"abstract":"With the rapid development of the polymer materials industry and the improvement of people's environmental awareness, magnesium hydroxide has been widely used in polymer materials due to its high decomposition temperature, non-toxic smoke suppression, and the advantages of neutralizing harmful gases produced by polymer combustion. However, the conventional preparation methods of magnesium hydroxide exhibit several issues, including high hydrophilicity, elevated polarity, and limited compatibility with polymers. This research proposes an improved method by adding sodium stearate and KH560 modifier, controlling the rate of magnesium oxide and preparing magnesium hydroxide flame retardants using a modifier-directed hydration method. Various characterizations confirmed its morphology, particle size and structure. The magnesium hydroxide exhibits low polarity, small particle size, stable structure and excellent hydrophobicity (with a contact angle of 120.32°, and a free energy of 1.34mN/m). In parallel, the magnesium hydroxide/polypropylene composites demonstrate excellent flame retardancy (LOI of 25%, V-1 grade) and simultaneously enhance the dispersion of magnesium hydroxide within the polypropylene matrix, improving the material's toughness and strength.","PeriodicalId":20169,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139234981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study of quartz classification in the enhanced gravity field using Falcon concentrator 使用猎鹰浓缩机对增强重力场中的石英进行分级的实验研究

IF 1.5 4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-11-15 DOI: 10.37190/ppmp/175242

Ling Zhang, Lu Yang, Yan Zhao, Haochun Hou, Zeliang Zhang, Cai-Hong Bu, Jun Lin, Xinran Zheng, Dong Fu

{"title":"Experimental study of quartz classification in the enhanced gravity field using Falcon concentrator","authors":"Ling Zhang, Lu Yang, Yan Zhao, Haochun Hou, Zeliang Zhang, Cai-Hong Bu, Jun Lin, Xinran Zheng, Dong Fu","doi":"10.37190/ppmp/175242","DOIUrl":"https://doi.org/10.37190/ppmp/175242","url":null,"abstract":"The classification and separation of minerals happen in the traditional gravity separation simultaneously. This paper focuses on the classification performance of quartz particles in the enhanced gravity field. The classification efficiency of single quartz particles decreased then increased with the increase of rotational angular velocity, while it decreased with the increase of backwash water pressure. The classification efficiency of -0.5 +0.25mm, -0.25 +0.125mm, -0.125 +0.074mm, -0.074 +0.045mm and -0.045mm quartz was higher than the corresponding narrow size of -0.5mm quartz in general. The “fish-hook” phenomenon appeared in the partition curve of -0.5mm quartz under small/large rotational angular velocity and small backwash water pressure, and the dip point could be found in fine particles region, which indicated that the “fish-hook” was closely related with operating parameters and particle size. A medium rotational angular velocity and larger backwash water pressure could be helpful to avoid the appearance of “fish-hook” in fine particles region and achieve a better classification performance. This investigation is beneficial to understand the regularity of particle migration in the enhanced gravity field.","PeriodicalId":20169,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139274814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of a capacity increase in AG milling of copper slag 铜渣 AG 研磨能力提升评估

IF 1.5 4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-11-15 DOI: 10.37190/ppmp/175181

Metin Nurullah Can, Orberk Mercan

{"title":"Evaluation of a capacity increase in AG milling of copper slag","authors":"Metin Nurullah Can, Orberk Mercan","doi":"10.37190/ppmp/175181","DOIUrl":"https://doi.org/10.37190/ppmp/175181","url":null,"abstract":"The verification of the desired capacity increase in the grinding circuits is performed by simulation studies as they suggest accurate and fast alternatives compared to expensive and labor-intensive methods, particularly for the evaluation of situations that require investment. In this study, simulation was used to evaluate the alternatives that can be made to increase the capacity from 38.86 tph to 90 tph in a grinding circuit where copper slag is autogenously milled. The slag sample was characterized by drop weight and abrasion tests to describe the breakage in autogenous (AG) milling. The performances of the existing circuit and equipment were determined by a comprehensive sampling study, and modeling studies were carried out to form the basis of the simulations. Simulation scenarios were evaluated as investment free and investment requiring alternatives. In the investment free option changing fresh feed size distribution was examined however, capacity could be increased up to only 42 tph. In investment option, increasing the mill motor capacities was simulated and 90 tph target throughput was provided. This result was validated in the plant by replacement of mill motors of AG and pebble mill for 1000 kW and 750 kW, respectively.","PeriodicalId":20169,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139275634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0