— An industrial-scale air-dense medium fluidized bed was used to prepare a low-ash coal from a feed coal that was difficult to wash. The low-ash coal provided raw material for preparing low-ash activated carbon. A new fluidized bed density control method for preparing a low-ash coal was proposed, which effectively reduced bed density …
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— Luo et al. [33] sorted 50–6 mm coal at a separating density of 1.44 g/cm 3 using magnetic pearls as a medium to form an ADMFB with low density. Duan et al. [34] used fluidized bed system with air dense medium for pyrite recovery from 50 to 13 mm and 13–6 mm fractions and achieved recovery rates equal to 81.69 and 79.51, respectively.
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— 1. Introduction. Air-dense medium fluidized beds (ADMFBs) have been increasingly used to beneficiate low-rank coal of lignite and coal in water-deficient areas or to increase the environmental friendliness of the process (Chen and Wei, 2003; He et al., 2013a).Achieving a high efficiency of coal beneficiation requires ADMFBs to have a …
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— In the present work, the influence of the distribution plate structure on the fluidization characteristics of fluidized bed with agitator was investigated. Two different feedstock samples with the size fraction of …
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— Low-rank coals are widely used as fuel in coal-fired power plants. Continuing the use of these fuels is under huge pressure because of stringent environmental regulations. The air dense medium fluidized bed (ADMFB), which is a dry physical coal beneficiation method, can offer an efficient and economical solution for ash removal. …
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Utilizing an Air-Dense Medium Fluidized Bed Dry Separating System for Preparing a Low-Ash Coal BO ZHANG1, YUEMIN ZHAO1, ZHENFU LUO1, SHULEI SONG1, GONGMIN LI2, AND CHENG SHENG1 1School of Chemical ...
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— The theory and technique of dense medium gas-solid fluidized bed beneficiation include the bubbling fluidized bed, the vibrated fluidized bed, and the magnetically fluidized bed [7][8][9][10][11 ...
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— Air dense medium fluidized bed separator (ADMFBS) uses the magnetite medium to improve the separation efficiency of beneficiation of high NGM coal. Stability of the particulate fluidized bed in this system is the essential prerequisite for the separation of heavy and light particles. In this study, the characterization of medium and particulate ...
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— The fluidized bed separator. R R Sharapov 1, ... which pollute the air basin and the huge territory around the factories that dumped these same wastes. This reduces as a space for human life and for the functioning and development of cities. ... [11] Oshitani J, Franks G and Griffin M 2010 Dry dense medium separation of iron ore using a gas ...
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— ABSTRACT In this study, the performance of a continuous air dense medium fluidized bed (ADMFB) separator is investigated for coal beneficiation. The full factorial experimental design method is used to study the effect of superficial air velocity (U), bed length (T), and bed height (H) on the clean-coal ash content, organic material recovery, …
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— Air dense medium fluidized bed (ADMFB) separation is the most widely used technology for dry-type coal cleaning with the efficiency comparable to those of wet-type methods. ... [212], secondary air-distribution fluidized bed separator (SADFBS) [213], pronation-grille baffle dense phase medium fluidize bed [214], and porous sponge …
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— From sampling point ② to sampling point ⑦ in the column, the ash content tends to increase, reaching the minimum value of 14.17% at the overflow port and the …
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— 4.1. Fluidized separation with dense medium technology. Air dense medium fluidized bed (ADMFB) separation is the most widely used technology for dry-type coal …
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— The air dense medium fluidized bed separator which has been developed for the dry beneficiation of coal and recognized as a low cost and high efficiency process. In some cases the efficient … Expand. PDF. 1 Excerpt; Save. Evaluation of the Performance of Air Dense Medium Fluidized Bed (ADMFB) for Low-Ash Coal Beneficiation. Part 1: …
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— The potential to remove mercury prior to coal utilization by ash rejection using an air dense medium fluidized bed separator was demonstrated. At a combustible recovery of 81%, an ash rejection of ...
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— Luo ZF, Chen QR (2001) Dry beneficiation technology of coal with an air dense-medium fluidized bed. Int J Miner Process 63(3):167–175. Article Google Scholar Luo ZF, Chen QR, Zhao YM (2002a) Dry beneficiation of coarse coal using an air dense medium fluidized bed (ADMFB). Coal Prep 22(1):57–64
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— The air dense-medium fluidized bed also differs in principle from pneumatic separating devices (using air as separating medium) such as air-tables that have comparatively high E P values. This technique introduces a new method of coal beneficiation for the regions where water resources are in short supply or weather is …
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— Air dense medium fluidized bed separation (ADMFB) technique demonstrated good separation performance for coal cleaning. Feeding position …
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— Low-rank coals are widely used as fuel in coal-fired power plants. However, feeding such a coal in addition to lower efficiency generates a variety of problems mostly associated with the ash-forming minerals. An efficient dry coal cleaning method can offer a solution while avoiding problems associated with wet methods and generates partially …
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— Dry coal beneficiation with an air dense medium fluidized bed (ADMFB) is an efficient way of producing high-quality clean coal without using water. ... An ADMFB separator employs a gas–solid fluidized bed, which is formed by air and dense particles, as the medium used for separation. A significant issue in this technology is the formation of ...
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— Preliminary results show that the air dense medium fluidized bed separator performance is quite satisfactory for the feed coal within the 50–15 mm size range. View. Show abstract.
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— An air dense medium fluidized bed separator is an efficient dry process for the removal of undesirable gangue material from run-of-mine coal. Its cleaning performance depends on a variety of ...
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— Available literature conforms that the separation efficiency of an air dense medium fluidized bed separator, which is a gravity separation operation, decreases with …
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— ABSTRACT In order to efficiently purify and recover the magnetite powder (dense medium) in the process of dry coal preparation of air-dense medium fluidized beds, a new type of fluidized dry magnetic separator was developed in this paper by changing the feeding device and mode, the location and structure of the separating tank, and the …
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— Air dense medium fluidized bed separator is one of the dry beneficiation techniques that uses magnetite powder and air as fluidizing mediums. It utilizes the pseudo fluid characteristics of air–magnetite fluidized bed to form a uniform and stable suspension of certain density, and separation is achieved by sink and float of coal particles as ...
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Air-dense Medium Fluidized Bed Separator 2.1 Theory and Fundamentals. The increasing consumer demands and greater environmental constraints compared with the past requires the need of coal beneficiation. Coal beneficiation is a process to …
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— A Teetered Bed Separator (TBS) was used autogenously, and with a range of media, to study the dense medium separation of a coal feed slurry, −2.00+0.375 mm in size.
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A novel air dense medium fluidized bed (ADMFB) separator developed by the China University of Mining and Technology, with magnetic powder and fine coal acting as the heavy medium, has the advantages of uniform and …
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— A separation density of 1.42 g/cm 3 was maintained in the air-dense medium fluidized bed to produce a clean coal with an ash content of 3.71%, with an E P …
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— The beneficiation of different size fractions (+5, −31 mm) of coal using an air-fluidized bed dry dense-medium separator with silica/zircon sands as the fluidizing-bed medium has been studied. … Expand. 30. Save. Dry Cleaning of Coal by a Laboratory Continuous Air Dense Medium Fluidised Bed Separator.
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— This dry separation method is known as Air Dense Medium Fluidized Bed (ADMFB) (Chen and Wei, 2003) which is capable of floating the clean coal with relative …
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— Beneficiation of coarse coal ore in an air-fluidized bed dry dense-medium separator. Int. J. Coal Prep. Util., 32 (2012), pp. 276-289. Crossref View in Scopus Google Scholar. Franks et al., 2013. G.V. Franks, M. Firdaus, J. Oshitani. Copper ore density separations by float/sink in a dry sand fluidised bed dense medium.
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