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Development of Dry type Fluidized High Gradient Magnetic Separation Device for Coal Powder Beneficiation

Research Project

Project/Area Number 59850042
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field 電力工学
Research InstitutionThe University of Tokyo

Principal Investigator

ODA Tetsuji  Assoc. Prof., Dept.Electrical Eng., Faculty of Eng., Univ.Tokyo, 工学部, 助教授 (90107532)

Co-Investigator(Kenkyū-buntansha) ITAGAKI Toshihumi  Educational Assistant, Dept.Electr.Eng., Faculty of Eng. (60242012)
Project Period (FY) 1984 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1986: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1985: ¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1984: ¥2,900,000 (Direct Cost: ¥2,900,000)
KeywordsCoal / Fluidization / High Gradient Magnetic Separation (HGMS) / Ash / 灰分 / 品位向上 / 磁気分離 / 炭分回収率 / 灰分除去率 / 熱刺激電流 / 磁化率
Research Abstract

A novel dry type high gradient magnetic separation (HGMS) device comprized with a fluidized-bed has been developed for the purpose of coal powder beneficiation for the electric power plant. Three types of FHGMS have been tested. The basic type A consisting of parallel and straight ferro-magnetic wires was examined with parameters of wire size, number of wires, coal particle size range, magnetic flux density, carrier gas velocity, amount of feed (processed coal) and so on. The carrier gas velocity where weight of mags (trapped part on wires) is maximum, and the gas velocity where the ash reduction ratio is maximum, are found to be different. That is, the optimum gas velocity for good separation process is slightly larger than that of mags peak indicating good and characteristic separation performance of fluidization. The optimum wire size was not defined exactly, but in general, a rather thick wire ( for example, 0.8 mm in diameter) is better than a small wire ( 0.1 or 0.3 mm in diamter ), contrary to the theoretical estimation where a small wire has relatively large capturing cross section normalized with the wire cross section. From the view point of technological reason, thick and hard wire or other mechanism is desirable. New devices of FHGMS with slotted steel plates (types B and C) in place of ferro-magnetic wires were also tested. Type B with horizontally slotted steel plates shows large ash reduction, however, the coal loss factor is also very large, resulting the worst separation performance among three types. Vertically slotted steel plates type C are very well with high ash reduction ratio where coal loss is as mostly small as type A. More large scale was also tested, for example, movable long steel plates were inserted and were moved to check the semi-continuous mode operation. It was found that the gas flow inside must be examined more to realize good separation performance.

Report

(2 results)
  • 1986 Final Research Report Summary
  • 1985 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] 小田哲治,國末義英,増田閃一: 日本応用磁気学会誌. 8. 205-208 (1984)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 小田哲治,高橋正,高市和明,増田閃一: 日本応用磁気学会誌. 11. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] T.Oda;T.Takahashi;K.Takaichi;S.Masuda: Digests of the INTERMAG Conf. 1987. DE-07 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] T.Oda;T.Takahashi;K.Takaichi;S.Masuda: Trans. IEEE on Magn.MAG-23. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] T.Oda;S.Masuda;T.Fujita: Proc.2nd.Int.Conf.on ESP. 540-547 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 小田哲治,高橋正,増田閃一: 21-24 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] T.Oda, Y.Kunisue and S. Masuda: "Coal Powder Beneficiation by Dry Fluidized HGMS Process." Journal of Magnetic Society of Japan. 8. 205-208 (1984)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] T.Oda, T.Takahashi, K.Takaichi and S.Masuda: "Coal Powder Beneficiation by a Dry Fluidized HGMS Process - Dependence on Coals from Various Countries -" Journal of Magnetic Society of Japan. 11. to be published (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] T.Oda, T.Takahashi, K.Takaichi and S.Masuda: "Pulverized Coal Beneficiation by a Fluidized High Gradient Magnetic Separation Process with Slotted Steel Plates" Digests of the INTERMAG Conf. 1987. DE-07 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] T.Oda, T.Takahashi, K.Takaichi and S.Masuda: "Pulverized Coal Beneficiation by a Fluidized High Gradient Magnetic Separation Process with Slotted Steel Plates" Trans. of IEEE on Magn.,. MAG-23. (187)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] T.Oda, S.Masuda and T.Fujita: "TSDC Measurement of Fly Ashes from Pulverized Coal Combustion." Proc. 2nd. Int. Cont. on ESP. 540-547 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 日本応用磁気学会学術講演概要集. (1985)

    • Related Report
      1985 Annual Research Report
  • [Publications] 静電気学会講演論文集'85. (1985)

    • Related Report
      1985 Annual Research Report
  • [Publications] Proc.of 2nd Int.Conf.on ESP. (1985)

    • Related Report
      1985 Annual Research Report
  • [Publications] 電気学会全国大会. (1986)

    • Related Report
      1985 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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