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APPLICATION OF TRIANGLE MARKOV CHAIN TO gravity concentration

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Acta Metallurgica Sinica(English Letters) 1990年第8期3卷 81-90页

作者： WANG Weixing HUANG Shu CHEN Jin Central South University of Technology,Changsha,China WANG Weixing,Department of Mineral Engineering,Central South University of Technology,Changsha,Hunan 410083,China

In combination with the Bagnold's shearing theory and the principle of Markov process,a mathematical model of sluice type's gravity concentrators has been developed based on the transfer probabilities of mineral *** to the transfer probabilities,the quanti- tative relationship between the final separation results and feed variables has been established and verified by experimental *** availability of this model is vital for process design and optimization or mill control of gravity concentration circuits.

关键词： gravity concentration mineral processing stochastic process Markov process sediment transport

Characterization and processing of talc-magnesite from the Zinelbulak deposit

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Mining Science and Technology 2010年第3期20卷 415-420,433页

作者： HOJAMBERDIEV Mirabbos ARIFOV Pulat TADJIEV Kamil XU Yunhua New York State College of Ceramics Alfred University Alfred 14802 USA Institute of General and Inorganic Chemistry Uzbekistan Academy of Sciences Tashkent 100170 Uzbekistan Institute of Wear Resistance Material Xi'an University of Architecture and Technology Xi 'an 710055 China

The characteristics of talc-magnesite from the Zinelbulak deposit(Uzbekistan) were investigated via X-ray diffraction, differential thermal analysis,infrared spectroscopy and optical *** mineralogical composition of the Zinelbulak talc-magnesite consists of 52 wt.%talc,43 wt.%carbonates and 5 wt.%of the iron-containing minerals magnetite,siderite and *** analysis confirmed the presence of carbonates in two forms:magnesite and *** tests revealed that talc and magnesite particles are completely separated after a grinding process carried out for 10～12 *** distribution of the yield of talc and magnesite,as a function of the particle size,shows an irregular feature in that a comparatively coarser sample(>0.1 mm) is richer in magnesite and poor in talc while a comparatively finer sample(gravity concentration,flotation and electromagnetic *** concentration was found to be the most economic initial process for the complete separation of magnesium carbonate and *** flotation and magnetic separation techniques could further increase the yield of high quality magnesite and *** samples prepared by heating the separated magnesite at 1600℃for 2 h met the State Standards for refractory materials.

关键词： talc-magnesite grinding froth flotation gravity concentration magnetic separation

Evaluation of Mayer curve validity on feed blending at the Zarand coal washery plant

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International Journal of Mining Science and Technology 2012年第1期22卷 19-22页

作者： Habetinejad Hamidreza Jorjani Esmaeil Sam Abbas Department of Mining Engineering Science and Research BranchIslamic Azad University Faculty of Mineral Processing Engineering Shahid Bahonar University

The coal processing methods used at the Zarand coal washery plant are the heavy medium bath,jigs,and *** coal-containing materials that are fed to the plant are acquired from different mines,and they have different washability *** this paper,the validity of Mayer curve (M-curve),the conventional method for determining coal washability,was evaluated on blending of raw coals that are fed to the *** curves were prepared for the hand-blended samples and compared with the washability predicted by the Mayer *** samples from different seams and mines were blended by hand in 50:50 ratios,and sink and float tests were performed;the resulting washability curves were in good agreement with the washability curves predicted using the Mayer method for the same blending *** work resulted in the preparation of the optimum plant feed that can be achieved from the blending of different coal samples to produce the best plant yield at a given ash content.

关键词： Coal Dense medium separation gravity concentration Mayer curve