Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
권호 표지
DOI QR코드

DOI QR Code

Grinding Characteristics of Domestic Sericite using a Planetary Ball Mill

유성밀에 의한 국내 견운모 광석의 분쇄 특성

  • Hee-Young Shin (Korea Institute of Geoscience and Mineral Resources) ;
  • Sang-hun Lee (Department of Environmental Science, Keimyung University)
  • Received : 2023.05.25
  • Accepted : 2023.06.21
  • Published : 2023.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

Sericite was ground with or without additives (LiNO3 or TiO2) using a planetary mill. The resultant ground products included the average particle size of 2-3 ㎛ (sericite only or sericite+LiNO3) and 0.5-0.6 ㎛ (sericite+TiO2) were obtained within 10 minutes of grinding time. respectively. In the grinding of the sericite without any addictive, the particle size initially decreased, but, as grinding time elapsed thereafter, agglomerates were formed and D50 increased over 10 ㎛. In contrast, when the additive was added, the particle size decreased as the grinding time elapsed and any aggregation was relatively not noticeable, compared with the grinding of the sericite only. As a result of measuring the zeta potential for the raw or the ground samples, variation of the zeta potential values according to pH at the early stage of the grinding with the addictives was gentler than that at the final stage of grinding, which showed the relatively similar trend to the pH-zeta potential correlation in grinding of raw sericite. In addition, as a result of the disintegration experiment through ultrasonic excitation, D50 decreased rapidly only until the disintegration time of about 50 minutes.

견운모와 첨가제(LiNO3 혹은 TiO2)를 주입하여 구심력 기반의 유성밀으로 분쇄한 결과 분쇄 시간 10분 이내에 각각 중간경(D50) 2~3 ㎛(견운모 단독 혹은 견운모+LiNO3) 및 0.5~0.6 ㎛(견운모+TiO2)의 분쇄 산물이 취득되었다. 견운모 단독 분쇄시 초기에는 입도(D50)가 감소하다가 이 후 분쇄시간이 경과되면서 입자 간 응집으로 D50이 10 ㎛ 이상으로 증가하였다. 반면, 첨가제 주입시 초기 분쇄시간 경과에 따른 입도감소가 두드러졌으나 응집은 견운모 단독분쇄의 경우보다 활발하지 않은 걸로 보인다. 제타전위 측정 결과 첨가제 주입 시 견운모 단독분쇄 경우보다 분쇄 초반에는 pH에 따른 제타전위가 완만하였으나 분쇄 후반에는 단독 분쇄 시의 pH-제타전위 경향에 상대적으로 근사하였다. 또한 초음파 가진을 통한 해쇄실험 결과 해쇄시간 50분 정도까지만 입도 감소가 급격한 것으로 관측되었다.

Keywords

Acknowledgement

본 연구는 한국지질자원연구원 과제인 "고이온강도 석탄재 침출과 탄산화 기법을 이용한 저농도 희토류 농축기술 개발"(과제번호 23-3801)의 지원으로 수행되었습니다.

References

  1. Reed, J. S., 1995 : Principles of Ceramics Processing, 2nd Ed., pp.58-99. 
  2. Ikazaki, F., Uchida, K., Kamiya, K., et al., 1996 : Chemically assisted dry comminution of sericite - dry comminution method accompanied by ion-exchange, Int. J. Miner. Process., 44-45, pp.93-100.  https://doi.org/10.1016/0301-7516(95)00021-6
  3. Kumar, G., Tanvar, H., Pratap, Y., et al., 2019 : Thermal and mechanical activation of sericite for recovery of potash values, Trans. Indian Inst. Met., 72, pp.17-25.  https://doi.org/10.1007/s12666-018-1452-3
  4. Singh, Y.P., Tanvar, H., Kumar, G., et al., 2019 : Investigation of planetary ball milling of sericite for potash recovery, Powder Technol., 351, pp.115-121. https://doi.org/10.1016/j.powtec.2019.04.013
  5. Hu, Y., He, J., Zhang, C., et al., 2018 : Insights into the activation mechanism of calcium ions on the sericite surface: A combined experimental and computational study, Appl. Surf. Sci., 427, pp.162-168.  https://doi.org/10.1016/j.apsusc.2017.07.265
  6. Liu, S., Li, Q., Xie, G., et al., 2016 : Effect of grinding time on the particle characteristics of glass powder, Powder Technol., 295, pp.133-141.  https://doi.org/10.1016/j.powtec.2016.03.030
  7. Preocanin, T., Abdelmonem, A., Montavon, G., et al., 2015 : Chapter 3. Charging behavior of clays and clay minerals in aqueous electrolyte solutions - experimental methods for measuring the charge and interpreting the results, Book title : Clays, clay minerals and ceramic materials based on clay minerals, edited by Gustavo Morari do Nascimento, IntechOpen, URL: https://www.intechopen.com/chapters/49766.