Application of carrier-microencapsulation for coal flotation to remove pyrite and to suppress acid mine drainage formation at tailing dam

2010 Fiscal Year Final Research Report

• Project/Area Number: 20360401
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Earth system and resources enginnering
• Research Institution: Hokkaido University
• Principal Investigator: HIROYOSHI Naoki Hokkaido University, 大学院・工学研究院, 教授 (50250486)
• Co-Investigator(Kenkyū-buntansha): TSUNEKAWA Masami 北海道大学, 大学院・工学研究院, 教授 (40002026) ; ITO Mayumi 北海道大学, 大学院・工学研究院, 准教授 (10339690) ; IGARASHI Toshifumi 北海道大学, 大学院・工学研究院, 教授 (90301944) ; FUKUSHIMA Masami 北海道大学, 大学院・工学研究院, 准教授 (40344113)
• Project Period (FY): 2008 – 2010
• Keywords: 石炭 / 黄鉄鉱 / カテコール / 薄膜 / 脱硫 / 鉱山酸性汚濁水

Research Abstract

Pyrite associated with coal generates SOx causing acid rain during coal combustion. In coal preparation, pyrite is rejected as a gangue mineral using the physical separation technique such as froth flotation and wasted into tailing pond. In the froth flotation, pyrite is frequently entrapped in froth together with valuable mineral due to its hydrophobic nature. Formation of acid mine drainage due to the air-oxidation of pyrite in tailing pond is also a serious problem. In the present study, carrier-microencapsulation (CME) is proposed to suppress both the floatability and oxidation of pyrite in coal preparation.

Research Products

• [Journal Article] Suppression of floatability of pyrite in coal processing by carrier microencapsulation (2011)
  • Author(s): Rani Kumari Thakur Jha, Jacqueline Satur, Naoki Hiroyoshi, Mayumi Ito, Masami Tsunekawa
  • Journal Title: Fuel Processing Technology Volume 92, Issue 5 Pages: 1032-1036
  • Peer Reviewed
• [Journal Article] Carrier Microencapsulation using Si-Catechol for Suppressing Pyrite Floatability (2008)
  • Author(s): Rani Kumari Thakur Jha, Jacqueline Satur, Naoki Hiroyoshi, Mayumi Ito, Masami Tsunekawa
  • Journal Title: Minerals Engineering Vol.21, no.12-14 Pages: 889-893
  • Peer Reviewed
• [Presentation] Application of CME Treatment on the Suppression of Pyrite Floatability and Oxidation in Coal Preparation (2010)
  • Author(s): Jha R.K.T., Satur J., Ito M., Hiroyoshi N., Tsunekawa M.
  • Organizer: MMIJ, Annual Autumn Meeting of Mining and Materials Processing Institute of Japan
  • Place of Presentation: Fukuoka, Japan.
  • Year and Date: 20100913-20100916
• [Presentation] Carrier Micro Encapsulation (CME) for Suppressing Pyrite Floatability and Oxidation in Coal Preparation (2010)
  • Author(s): Jha R.K.T., Satur J., Ito M., Hiroyoshi N., Tsunekawa M.
  • Organizer: AUSIMM, International Mineral Processing Congress
  • Place of Presentation: Brisbane,Australia.
  • Year and Date: 20100906-20100910
• [Presentation] 硫化鉱物の浮遊性に及ぼすキャリアマイクロエンカプセレーションの効果 (2010)
  • Author(s): 広吉直樹,川代晋太郎,Rani Kumari Thakur Jha,恒川昌美,伊藤真由美
  • Organizer: MMIJ, Annual Spring Meeting of Mining and Materials Processing Institute of Japan
  • Place of Presentation: Tokyo, Japan.
  • Year and Date: 20100330-20100401
• [Presentation] Application of Carrier microencapsulation using Si-catechol Complex for Pyrite Removal from Coal (2009)
  • Author(s): Jha R.K.T., Satur J., Ito M., Hiroyoshi N., Tsunekawa M.
  • Organizer: KIRR, RRDC, KNCPC, East Asian ResourcesRecycling Technology
  • Place of Presentation: Jeju Island, South Korea.
  • Year and Date: 20091102-20091106
• [Presentation] Carrier microencapsulation (CME) for Coal Preparation, Department of Sustainable Resources Engineering,Hokkaido University (2009)
  • Author(s): Jha R.K.T., Satur J., Ito M., Hiroyoshi N., Tsunekawa M.
  • Organizer: 3rd International Workshop and Conference on Earth Resources Technology
  • Place of Presentation: Sapporo, Japan.
  • Year and Date: 20090513-20090514
• [Presentation] Application of Carrier Microencapsulation using Si and Catechol to Suppress Pyrite Floatability in Coal Production (2008)
  • Author(s): Jha R.K.T., Satur J., Ito M., Hiroyoshi N., Tsunekawa M.
  • Organizer: MMIJ, Annual Autumn Meeting of Mining and Materials Processing Institute of Japan
  • Place of Presentation: Sendai, Japan.
  • Year and Date: 20081006-20081009