检索结果-南通市图书馆

Effect of ultrasonic irradiation on particle size,reagents consumption,and feed ash content in coal flotation

在线全文

学校读者我要写书评

暂无评论

International Journal of Coal Science & Technology 2020年第4期7卷 787-795页

作者： Hossein Ebrahimi Mohammad Karamoozian Department of Mining Petroleum and GeophysicsShahrood University of TechnologyShahroodIran

Ultrasonic waves have a lot of use in the particle surface cleaning.As flotation is one of the methods associated with surface properties,this paper investigates the effect of these waves on performance,particle size,reagents,and feed ash content in coal flotation.To accomplish this goal,coal samples in three size fractions,including coarse(-800 to+400μm),medium(-400 to+100 μm)and fine(-100μm)with various feed ash content.The flotation experiments were evaluated by process indexes such as yield,combustible recovery,and selectivity index.The results indicated the increasing of yield.The increasing was significant in medium size.Furthermore,the results showed that in presence of ultrasonic waves,the collector and frother consumption decreased.And also,applying ultrasonic waves would result more combustible recovery and selectivity index.The ash selectivity index had the highest impact for high feed ash content.

关键词： flotation Ultrasonic waves Coal Particle size Reagents Feed ash

ROOM TEMPERATURE CLEANER flotation TECHNIQUE FOR SCHEELITE ROUGH CONCENTRATE

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1997年第2期7卷 21-25页

作者： Tian, Xueda Zhang, Xiaoyun Li, Longfeng Wang, Dianzuo Xiangtan Univ Xiangtan China

ＲＯＯＭＴＥＭＰＥＲＡＴＵＲＥＣＬＥＡＮＥＲＦＬＯＴＡＴＩＯＮＴＥＣＨＮＩＱＵＥＦＯＲＳＣＨＥＥＬＩＴＥＲＯＵＧＨＣＯＮＣＥＮＴＲＡＴＥ①ＴｉａｎＸｕｅｄａＣｈｅｍｉｓｔｒｙ＆ＣｈｅｍｉｃａｌＥｎｇｉｎｅｒｉｎｇＣｏ... 详细信息

ＲＯＯＭＴＥＭＰＥＲＡＴＵＲＥＣＬＥＡＮＥＲＦＬＯＴＡＴＩＯＮＴＥＣＨＮＩＱＵＥＦＯＲＳＣＨＥＥＬＩＴＥＲＯＵＧＨＣＯＮＣＥＮＴＲＡＴＥ①ＴｉａｎＸｕｅｄａＣｈｅｍｉｓｔｒｙ＆ＣｈｅｍｉｃａｌＥｎｇｉｎｅｒｉｎｇＣｏｌｅｇｅ，ＸｉａｎｇｔａｎＵｎｉｖ...

关键词： scheelite flotation technique depressant

Depressing effect of sodium hexametaphosphate on apatite in flotation of rutile

在线全文

学校读者我要写书评

暂无评论

Journal of University of Science and Technology Beijing 2007年第3期14卷 200-203页

作者： Hao Ding Hai Lin Yanxi Deng School of Materials Science and Technology China University of Geosciences （Beijing） Beijing 100083 China Civil and Environmental Engineering School University of Science and Technology Beijing Beijing 100083 China

The separation of rutile from apatite by flotation and the mechanism of depressing the apatite of sodium hexametaphosphate were studied. The results showed that rutile and apatite could be separated by using alkyl-mino-bismethylene phosphoric acid and sodium hexametaphosphate as a collector and a regulator, respectively. Sodium hexametaphosphate could selectively dissolve calcium ions on the apatite surface, and make calcium ions break away from lattice binding through combining.

关键词： rutile apatite sodium hexametaphosphate flotation depressing

flotation of quartz using N-(2-aminoethyl)-octadecanamide as collector

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University of Technology 2003年第4期10卷 329-332页

作者： ZHAO Shi-min (赵世民) School of Resources Processing and Bioengineering Central South University Changsha 410083 China

The flotation behavior of quartz using N-(2-aminoethyl)-octadecanamide (AEOA ) as a collector was investigated.Zeta potential and infrared spectra were conducted to investigate the mechanism of the interaction of the quartz surface with the collector molecules. The results show that electrostatic force and hydrogen bond play an important role in governing the mechanism of flotation in acidic and alkaline media. The recoveries of quartz are (99.0%)-99.8% in the pH range of 3-11. The recovery of quartz is less dependent on AEOA concentration, mainly due to the formation of micellae in aqueous solution,and the adsorption density of AEOA on the quartz surface nearly remains constant.

关键词： quartz flotation N-(2-aminoethyl)-octadecanamide adsorption

Investigation on the flotation Mechanism of Tantalite-Niobite Minerals with Styrenephosphonic Acid Collector

在线全文

学校读者我要写书评

暂无评论

Rare Metals 1990年第2期10卷 81-88页

作者： Huang, Jianhui Li, Yukang Sun, Ji Dong, Ronggeng General Research Inst for Non-ferrous Metals China

The flotability and mechanism of tantalite-niobite minerals which have different contents of Ta, Nb, Fe Mn using styrenephosphonic acid (SPA) were investigated. The optimum pH value in pulp is less than 5, flotability varies with the different contents of mineral, and flotability of minerals with higher Nb2O5 content is better than that with higher Ta2O5 content. In wide range of pH in solution, the Fe, Mn on the surface are the main active species for flotation. Research using Auger electron spectroscopy, infrared spectroscopy and ultraviolet spectroscopy for determining surface conditions has been done. SPA interacts with Fe, Mn ions on the surface by a chemical bond force. On the outer layer of the collector, which is a non-uniform multilayer, adsorption of SPA on surface is both chemico-adsorption and physico-adsorption, but chemico-adsorption is dominant.

关键词： Hydrogen Ion Concentration Niobium Ore Treatment flotation

Fourier Transform Infrared Spectroscopic Studies in flotation

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2001年第1期16卷 63-69页

作者：龚文琪 Sch. of Res./Environmental Eng. Wuhan University of Technology Wuhan 430070 China

Fourier transform infrared (FTIR) spectroscopy has beenextensively employed in flotation research. The work done by theauthor and co-workers has been reported. A comparison has been madeamong the different FTIR spectroscopic techniques, e.g., transmissionFTIR spectroscopy, diffuse reflectance infrared Fourier transform(DRIFT) spectroscopy, and attenuated total reflectance (ATR) FTIRspectroscopy.

关键词： flotation infrared spectroscopic study Fourier transform

Isolation of protein from Chlorella sorokiniana CY1 using liquid biphasic flotation assisted with sonication through sugaring-out effect

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2019年第3期37卷 898-908页

作者： CHIA Shir Reen CHEW Kit Wayne SHOW Pau Loke SIVAKUMAR Manickam LING Tau Chuan TAO Yang Bioseparation Research Group Department of Chemical and Environmental EngineeringFaculty of EngineeringUniversity of Nottingham Malaysia CampusSemenyih 43500Malaysia Department of Chemical and Environmental Engineering Faculty of EngineeringUniversity of Nottingham Malaysia CampusSemenyih 43500Malaysia Institute of Biological Sciences Faculty of ScienceUniversity of MalayaKuala Lumpur 50603Malaysia College of Food Science and Technology Nanjing Agricultural UniversityNanjing 210095China

Microalgae,a sustainable source of multi beneficial components has been discovered and could be utilised in pharmaceutical,bioenergy and food applications.This study aims to investigate the sugaring-out effect on the recovery of protein from wet green microalga,Chlorella sorokiniana CY1 which was assisted with sonication.A comparison of monosaccharides and disaccharides as one of the phaseforming constituents shows that the monosaccharides,glucose was the most suitable sugar in forming the phases with acetonitrile to enhance the production of protein(52% of protein).The protein productivity of microalgae was found to be significantly influenced by the volume ratio of both phases,as the yield of protein increased to 77%.The interval time between the sonication as well as the sonication modes were influencing the protein productivity as well.The optimum protein productivity was obtained with 10s of resting time in between sonication.Pulse mode of sonication was suitable to break down the cell wall of microalgae compared to continuous mode as a lower protein yield was obtained with the application of continuous mode.The optimum condition for protein extraction were found as followed:200g/L glucose as bottom phase with volume ratio of 1:1.25,10s of resting time for ultrasonication,5s of ultrasonication in pulse mode and 0.25g of biomass weight.The high yield of protein about 81% could be obtained from microalgae which demonstrates the potential of this source and expected to play an important role in the future.

关键词： sugaring-out Chlorella sorokiniana CY1 liquid biphasic flotation sonication microalgae extraction

Upgrading graphite by flotation at Bogala Mines in Sri Lanka

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2001年第3期13卷 193-196页

作者： M.R.Salgado (Central South University, Changsha 410083, China) Central South University Changsha China

Graphite is naturally floatable due to its hydrophobic pro pe rty and also soft and smears on other gangue particles, rendering the gangue mor e or less floatable too. Due to this reason it is important to concentrate on ar eas such as suitable flotation reagents, depression agents, pH modifiers, and pa rticle size to be fed during the process. The paper surveys and analyses the sui table particle size to be fed to achieve high-grade concentrate. According to t h e work carried out the author suggested the ideal cost effective flotation f low sheet for improved results at Bogala Mines in Sri Lanka.

关键词： graphite flotation process reagent carbon percentage

THE DEPRESSION OF PYRITE flotation BY THIOBACILLUS FERROOXIDANS

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2000年第1期15卷 60-65页

作者：袁欣 Wuhan University of Technology China School of Resources and Envir. Eng. Wuhan University of Technology Wuhan 430070 China

The experimental studies on the microbial flotation of a pure pyrite sample using Thiobacillus ferooxidans was conducted in the laboratory. The results indicate that Thiobacillus ferrooxidans has strong depression effect on the flotation of pyrite. Thiobacillus ferrooxidans can adsorb on the surface of pyrite in a very short time (a few min.), changing the surface from hydrophobic into hydrophilic and making the pyrite particles to lose their floatability. Therefore, Thiobacillus ferrooxidans is an effective microbial depressant of pyrite. It has also been pointed out that the depression of pyrite by Thiobacillus ferrooxidans is caused by the adsorption of the microbial colloids, but not by the oxidation effect.

关键词： thiobacillus ferrooxidans flotation depression pyrite