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

Removal of silver from chloride solutions using new polymer materials 用新型高分子材料从氯化物溶液中去除银

4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-10-21 DOI: 10.37190/ppmp/174357

Magdalena Pilśniak-Rabiega, Joanna Wolska

{"title":"Removal of silver from chloride solutions using new polymer materials","authors":"Magdalena Pilśniak-Rabiega, Joanna Wolska","doi":"10.37190/ppmp/174357","DOIUrl":"https://doi.org/10.37190/ppmp/174357","url":null,"abstract":"This work presents the synthesis of polymer resins with heterocyclic functional groups, that is, N-(3-aminopropyl)-2-pipecoline, N-(3-aminopropyl)-2-pyrrolidinone, and trans-1,4-diaminocyclohexane for the recovery of Ag(I) from chloride solutions. The modification yield was 69.2, 74.6 and 88.3%, respectively. The best Ag(I) sorption was achieved from synthetic and real chloride solutions in the case of trans-1,4-diaminocyclohexane resin (sorption was 26.8 and 21.5 mg/g, respectively). The sorption kinetic data were well fitted to the pseudo-first-order kinetic model. The maximum sorption capacity of Ag(I) is 105.4, 117.8 and 130.7 mg Ag(I)/g for N-(3-aminopropyl)-2-pipecoline resin, N-(3-aminopropyl)-2-pyrrolidinone resin and trans-1,4-diaminocyclohexane resin, respectively. The trans-1,4-diaminocyclohexane modified resin was very selective towards Ag(I) compared to Cu(II), Pb(II), and Zn(II) from the real chloride leaching solution. The N-(3-aminopropyl)-2-pipecoline and N-(3-aminopropyl)-2-pyrrolidinone resins showed high preferences for Ag(I) over Pb(II) in real solution. These results indicated that the polymers can be applied in the recovery of Ag(I).","PeriodicalId":49137,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135510971","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

Organosolv lignin particles as an ecological reagents in the Kupfershiefer copper ore flotation 有机溶剂型木质素颗粒作为生态药剂在铜矿石浮选中的应用

4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-10-21 DOI: 10.37190/ppmp/174363

Kajetan Witecki, Monika Szkurat, Katerina Hruzova

{"title":"Organosolv lignin particles as an ecological reagents in the Kupfershiefer copper ore flotation","authors":"Kajetan Witecki, Monika Szkurat, Katerina Hruzova","doi":"10.37190/ppmp/174363","DOIUrl":"https://doi.org/10.37190/ppmp/174363","url":null,"abstract":"Mineral separation relies heavily on the process of flotation. This study explored the feasibility of using organosolv lignin nanoparticles and microparticles (OLP) as a greener alternative to xanthates in the flotation process for mineral separation. Xanthates are widely used but pose environmental and health risks. The efficiency of OLP as collectors was compared to collectorless flotation, resulting in approximately 50% copper recovery, indicating that OLP may not be a suitable replacement for xanthates. Further tests were conducted using a mixture of xanthates and OLP (birch nano and spruce micro) with varying substitution levels (20%, 30%, and 40%). The results demonstrated that increasing the dosage of OLP led to a decrease in flotation efficiency for copper. TOC analysis of the products revealed that high dosages (160 g/t) of birch nano and spruce micro as sole collectors showed beneficiation and selective recovery against copper. While OLPs did not prove effective as collectors, the study highlights their potential as substitutes for maltodextrin in selective flotation of the final concentrate. Two out of four tested OLPs were recommended for pilot scale testing.","PeriodicalId":49137,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135512693","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

Study of new commercial collectors for the recovery of coarse quartz particles in iron ore flotation 新型商用捕收剂在铁矿浮选中回收粗粒石英的研究

4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-10-20 DOI: 10.37190/ppmp/174292

Geraldo Lisboa Oliveira, Gilberto Rodrigues da Silva

{"title":"Study of new commercial collectors for the recovery of coarse quartz particles in iron ore flotation","authors":"Geraldo Lisboa Oliveira, Gilberto Rodrigues da Silva","doi":"10.37190/ppmp/174292","DOIUrl":"https://doi.org/10.37190/ppmp/174292","url":null,"abstract":"Currently, a small range of commercial collectors is available for the use in reverse iron ore flotation at Vale. This input represents a considerable unit cost, being essential for the concentration of low content itabiritic iron ores. The present work evaluated the reverse cationic flotation of an itabiritic ore with low iron content (39.6 % Fe) from the Iron Quadrangle (BR) in bench scale tests, focusing on the use of new collectors to remove coarse quartz. The sample presents 19% of its particles as oversize in the 0.150 mm sieve. The poor flotation of coarse quartz particles (>0.150 mm) causes significant problems in various iron ore flotation circuits by contaminating the concentrate. The study evaluated the performance of 10 new collectors from the etheramine family with different degrees of neutralization and at different collector dosages. The flotation process variables were set as industrially practiced at the Cauê iron ore plant (BR). In tests varying the specific collector dosage, the non-neutralized etheramines showed improved performance compared to the current 50% neutralized etheramine used in the plant, achieving industrial targets: concentrate SiO2 content rate lower than 4.5% (1.4%), tailings iron content lower than 23% (18.94%), metallurgical recovery greater than 66% (74,8%), and Gaudin Selectivity Index greater than 6.6 (10.5). The 0.150 mm oversize in the concentrate, mostly coarse quartz particles, was reduced from 5.7% down to 1.2%, indicating the potential for the industrial application of non-neutralized etheramines in the recovery of coarse quartz.","PeriodicalId":49137,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135617535","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

Effects of different grain size of expanded perlite aggregate and content of silica aerogel on the characteristics of lightweight cementitious composite 膨胀珍珠岩骨料的不同粒径和二氧化硅气凝胶含量对轻质胶凝复合材料性能的影响

4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-10-20 DOI: 10.37190/ppmp/174338

Andrii Vashchuk, Agnieszka Slosarczyk

{"title":"Effects of different grain size of expanded perlite aggregate and content of silica aerogel on the characteristics of lightweight cementitious composite","authors":"Andrii Vashchuk, Agnieszka Slosarczyk","doi":"10.37190/ppmp/174338","DOIUrl":"https://doi.org/10.37190/ppmp/174338","url":null,"abstract":"In this research, an attempt was made to investigate effects of expanded perlite aggregate grain size on consistency, density, compressive strength, thermal conductivity and microstructure of 15 different composite mixes with silica aerogel. As for the samples preparation, expanded perlite aggregate of 5 different groups based on grain size, were used for sample preparation, then partially replaced by volume for 20% and 40% of hydrophobic silica aerogel particles. The results showed, that density of the samples varied between 0.35 g/cm3 and 1.5 g/cm3, flexural strength varied between 3.4 MPa and 7.4 MPa, compressive strength was in the range between 12.3 MPa and 55 MPa, thermal conductivity coefficient was in the range between 0.130 W/mK and 0.190 W/mK. Scanning electron microscopy showed that expanded perlite aggregates and silica aerogel particles are capable of being mixed and formed homogenous mixture. Nevertheless, microscope images indicated weaker adhesion of silica aerogel particles at interfacial zone as compared with expanded perlite aggregate particles. Results revealed, that both of the factors: grain size of expanded perlite aggregate particles silica aerogel content influenced the density, compressive strength and thermal conductivity. The study also indicated feasibility of expanded perlite aggregate and silica aerogel for achieving homogeneous mixture of the lightweight cementitious composites. Study demonstrated that using different size fractions of expanded perlite aggregate affects differently physical, mechanical and thermal characteristics of the lightweight cementitious composite with silica aerogel.","PeriodicalId":49137,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135569171","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

Flotation separation influenced by the rheological properties of diaspore-pyrite mixed pulp 水硬—黄铁矿混合矿浆流变性能对浮选分离的影响

4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-10-19 DOI: 10.37190/ppmp/174305

Yongqing Zhao, Xianhai Li

{"title":"Flotation separation influenced by the rheological properties of diaspore-pyrite mixed pulp","authors":"Yongqing Zhao, Xianhai Li","doi":"10.37190/ppmp/174305","DOIUrl":"https://doi.org/10.37190/ppmp/174305","url":null,"abstract":"The effects of pyrite and diaspore with different particle sizes on the rheological properties of pulp with butyl xanthate added as a collector were studied, and the mechanism for rheological pyrite separation from diaspore by flotation was probed. The apparent viscosity of the diaspore pulp with different particle sizes was higher than that of pyrite, especially for -30 μm diaspore. Microfine diaspore was an important component affecting the apparent viscosity and yield stress of the diaspore-pyrite mixed pulp, and the pulp became a non-Newtonian fluid when the mass fraction of fine-grained diaspore in the mixed pulp was high. In this study, sodium hexametaphosphate (SHMP) was used to control the rheology of the mixed pulp and improve the pyrite flotation, and the S (sulfur) recovery rate first increased and then decreased with increasing SHMP concentration. The apparent viscosity of the pulp decreased by 3.01% and the S recovery rate increased by 34.83% when the amount of added SHMP was 0.05 mg/kg. The apparent viscosity with 0.50 mg/kg SHMP was 21.76% lower than that seen with the addition of 0.05 mg/kg SHMP, but the S recovery rate was also reduced by 14.94%. Further research showed that the increased SHMP concentration led to increases in the electronegativities of the particle surface and the repulsive force between particles, which prevented agglomeration of the particles, reduced the apparent viscosity and yield stress of the mixed pulp, promoted collisions between the pyrite particles and the bubbles, and reduced the resistance of the air bubbles to flotation.","PeriodicalId":49137,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135730358","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

Research on deposition of silver nanoparticles at the cellulose/NaNO3 electrolyte interface 纳米银在纤维素/NaNO3电解液界面

4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-10-10 DOI: 10.37190/ppmp/173554

Władysław Janusz, Klaudia Kowalska, Ewa Skwarek

引用次数: 0

Effect of spiral vanes width on the separation performance of a hydrocyclone 螺旋叶片宽度对水力旋流器分离性能的影响

4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-10-10 DOI: 10.37190/ppmp/173563

Peikun Liu, Xiaoguo Wang, Lanyue Jiang, Yuekan Zhang, Xinghua Yang, Xiaoyu Li, Hui Wang

引用次数: 0

Daily disposable contact lenses as a platform for ocular drug delivery of cyclosporine A 日用一次性隐形眼镜作为环孢素a眼部给药平台

4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-09-22 DOI: 10.37190/ppmp/172794

Ola Michałkiewicz, Iwona Nowak, Rafał Nowak, Iwona Rykowska

{"title":"Daily disposable contact lenses as a platform for ocular drug delivery of cyclosporine A","authors":"Ola Michałkiewicz, Iwona Nowak, Rafał Nowak, Iwona Rykowska","doi":"10.37190/ppmp/172794","DOIUrl":"https://doi.org/10.37190/ppmp/172794","url":null,"abstract":"Ophthalmic drug delivery is an important area of research that aims to improve the efficacy and convenience of treatment for various eye conditions. There are multiple ways in which drugs can be delivered to the eye, including eye drops, ointments, gels, and inserts. The most prevalent way of administering medication to the eye is through eye drops. They are easy to use and can be self-administered by patients. Nonetheless, eye drops have the disadvantage of being prone to removal by tears, which may result in insufficient drug absorption and reduced effectiveness. Irregular use of active substances can exacerbate the disease, resulting in prolonged treatment with questionable efficacy. Soft contact lenses that serve as ophthalmic drug delivery systems (DDS) can become a viable substitute for traditional treatments. These polymeric lenses can be embedded with various active compounds, some of which are not readily soluble in water or physiological fluids. One such drug is Cyclosporine A (CyA), an immunosuppressant with a high molecular weight and hydrophobic properties, chronically used to treat dry eye syndrome (DES). The article discusses the development of a method for modifying Hilafilcon B contact lenses obtained from drugstores with Cyclosporine A (CyA). The drug was administered to the lenses using an immersion technique, and the process parameters were monitored to control drug release efficiency and profile. The drug release was measured in an Artificial Lacrimal Fluid (ALF) buffer, mimicking tear fluid with a pH of 7.9. The stability of CyA in this buffer was assessed. For the parameters used, the best drug application and release profile was achieved by immersing the contact lenses for 24 hours at 25 °C in a CyA solution containing 20 μg/ml of the active substance and adding 5 mg/ml of Vitamin E.","PeriodicalId":49137,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136058982","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

Crystal-to-crystal investigations of highly thermally stable three-dimensional coordination polymer based on sodium(I) ions and 4,4’-stilbenedicarboxylic acid 基于钠(I)离子和4,4 ' -二苯甲酸的高热稳定性三维配位聚合物的晶体间研究

4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-09-21 DOI: 10.37190/ppmp/172683

Marcin Groszek, Renata Łyszczek, Agnieszka Ostasz, Dmytro Vlasyuk

{"title":"Crystal-to-crystal investigations of highly thermally stable three-dimensional coordination polymer based on sodium(I) ions and 4,4’-stilbenedicarboxylic acid","authors":"Marcin Groszek, Renata Łyszczek, Agnieszka Ostasz, Dmytro Vlasyuk","doi":"10.37190/ppmp/172683","DOIUrl":"https://doi.org/10.37190/ppmp/172683","url":null,"abstract":"The new three-dimensional coordination polymer termed {[Na2SDC(H2O)]}n (SDC2-= C16H10O42-) has been synthesized using workstation Easymax 102 while controlling the conditions and monitoring in-situ reagents. The metal complex was obtained in the reaction of sodium hydroxide with a suspension of 4,4’-stilbenedicarboxylic acid in aqueous medium. The compound was characterized by elemental analysis, single crystal, and powder X-ray diffraction methods, ATR-FTIR spectroscopy, SEM and optical microscopy, TG-DSC and TG-FTIR thermal analysis in air and nitrogen atmosphere. In the crystal structure of {[Na2SDC(H2O)]}n appears penta- and hexacoordinated sodium atoms joined by octa- and decadentate SDC2- linkers. Aqua ligand acts as bridge between Na1 and Na2 atoms. The as-synthesized sodium complex is thermally stable up to 86oC whereas its dehydrated form has extreme stability up to 491oC. Removal of water molecule leads to the crystal-to-crystal transformation yielded changes in coordination modes of COO groups. Reversibility of the hydration process in the studied complex was also examined.","PeriodicalId":49137,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136153397","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

Research on preparation and properties of porous ceramsites sintered with high-ash coal slime 高灰分煤泥烧结多孔陶粒的制备及性能研究

4区工程技术

Physicochemical Problems of Mineral Processing Pub Date : 2023-09-21 DOI: 10.37190/ppmp/172665

Dan Zhu, Fanfei Min, Wenbao Lv

{"title":"Research on preparation and properties of porous ceramsites sintered with high-ash coal slime","authors":"Dan Zhu, Fanfei Min, Wenbao Lv","doi":"10.37190/ppmp/172665","DOIUrl":"https://doi.org/10.37190/ppmp/172665","url":null,"abstract":"In order to realize the resource and harmless utilization of high-ash coal slime in coal preparation plants, porous ceramsites were prepared by the high-temperature sintering method with coal slime as raw material. The influences of sintering temperature, sintering time and ash content on the properties of porous ceramsites were studied by experiments, and the phase composition, micro-morphology and pore structure characteristics of ceramsites were analyzed by XRD, SEM and BET. The experimental results showed that with the increase of sintering temperature and sintering time, the amount of molten liquid in ceramsite green bodies increased, the densification degree of ceramsites increased gradually, the bulk density and the apparent density increased gradually, and the water absorption and the apparent porosity decreased gradually. However, with the increase of coal slime ash content, the quantity of pores within ceramsites increased first and then decreased. When the coal slime ash content was 55%, the bulk density of porous ceramsite sample was 0.549g/cm3, the water absorption rate was 64.63%, the specific surface area was 19.40m2/g, the crushing rate and wear rate were 0.14%, with rough surface, porous structure and excellent water absorption performance, which met the optimum performance requirements of porous ceramsites. At the same time, this research also provides a new idea and method for the reuse of high-ash coal slime resource, a by-product of coal washing and dressing","PeriodicalId":49137,"journal":{"name":"Physicochemical Problems of Mineral Processing","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136235372","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