A kinetic study of pyrite in the lime roasting of a vertical cyclone

수직 싸이클론의 ${Ca(OH)}_{2}$ 배소에서 $FeS_{2}$의 열적반응에 관한 연구

  • 조종상 (동신대학교 보석공학과)
  • Published : 1999.02.01

Abstract

This research has been studied in terms of investigating the reaction behavior of pyrite with a cyclone reactor. The Mathematical model has developed pyrite oxidation and lime sulfation in this reactor. The model assumes a chemical control shrinking core behavior for the pyrite and a fluid film control shrinking core behavior for the lime. The model was solved and characterized numerically. Experiments have been performed to study the influence of reaction parameters such as reactor temperatures, pyrite particle sizes, air flow rates, feeding rates, and mixing ratio of pyrite and lime. The oxidation and sulfation products were characterized chemically and physically.

본 연구는 싸이클론 반응로에서 $FeS_{2}$의 반응 특성에 관한 조사를 연구하였다. 수학적인 모형도로 이 반응로에서 $FeS_{2}$의 oxidation과 suifation 등을 전개하엿다. 모형은 $FeS_{2}$에서 chemical control shrinking core로서 그리고 ${Ca(OH)}_{2}$에서 fluid film control shrinking core로서 가정하였으며 수식으로서 발전시켰다. 본 실험은 이 반응 파라메터들의 영향에 연구로서 진행하였으며 즉 반응로의 온도변화, $FeS_{2}$의 입자크기, 공기 주입비율, 시료 주입비율, 그리고 $FeS_{2}$${Ca(OH)}_{2}$ 비율 등이다. Oxidation과 Sulfation에 의한 반응물들은 화학적 및 물리적으로 특성을 기술하였다.

Keywords

References

  1. Gold Metallurgy in South Africa Chamber of South Africa N.P. Finkelstein
  2. Precious Metals Recovery of Gold from Arsenical Ores M.C. Jha;M.J. Kramer
  3. Process Selection for the Olymppias Refractory Gold Concentrate. Precious Metal 89 A. Kontopoulos;M. Stefanakis
  4. Metallurgical Transactions v.B Oxidation Kinetics of a Lime Copper Concentrate Pellet H.H. Haung;R.W. Bartlett
  5. Metallurgical Transactions v.B Fluidized Bed Roasting of Lime Copper Concentrate Pellets H.H. Haung;R.W. Bartlett
  6. Metallurgical Transactions v.B Oxidation Aspects of a Lime-Concentrate- Pellets H. Ahmadzai;S. Blairs;B. Harris;L.-I. Staffansson
  7. Journal of the South African Institute of Mining an Metallurgy The Dissolution of Gold from Roasted Pyrite Concentrates A.O. Filmer
  8. Precious Metals v.89 Rapid Oxidation of Refractory Gold-Bearing Ores by Intense David Seymour;Gopalan Ramadorai
  9. The Recovery of Gold from Refractory Ores, Gold100 v.2 M.J. Dry;C.F.B. Coetzee
  10. CIM Bulletin v.76 The Mineralogy of Gold and it's Significance in Metal Extraction C. Gasparini
  11. The Roasting of Arsenical Gold Ores, Gold 100 P.M. Swash;G.T. Holle