Preparation of Slow-Release Potassium Silicate Fertilizer Using Converter Slag

전로(轉爐)슬래그를 활용(活用)한 완효성(緩效性) 칼리 비료(肥料)의 제조(製造) 특성(特性)

  • Yang, Yeong-Ho (Department of Automobile, KookJe College) ;
  • Kim, Young-Hwan (Central Technical Research Lab., DONGKUK Steel Mill Co., LTD) ;
  • Ko, In-Yong (Div. of Advanced Materials Engineering, Research Center of Advanced Materials Development, Chonbuk University)
  • 양영호 (국제대학교 자동차계열) ;
  • 김영환 (동구제강 중앙기술연구소 제강연구팀) ;
  • 고인용 (전북대학교 신소재공학부 신소재개발연구센터)
  • Published : 2007.08.27

Abstract

As a basic study for reusing converter slag as slow-release potassium fertilizer by a sintering process, powdery converter slag and reagent grade $SiO_2\;and\;K_2CO_3$ were mixed with ball mill above 24 hours and sintered at $900^{\circ}C{\sim}1000^{\circ}C\;for\;10{\sim}60$ min. Basicity of the mixed powder was controlled to 0.7, 1.0 and 1.4 and content of $K_2O$ was fixed with 22 mass%. After sintering, property of the potassium fertilizer was investigated with X-ray diffraction pattern and ICP analysis. Also effects of basicity, sintering temperature and time on the making slow-release potassium fertilizer was investigated. Water solubility of KBO in sample were decreased with sintering time, temperature and decreased with basicity. Citric acid solubility of $K_2O$ were increased with basicity and decreased with sintering temperature.

전로슬래그를 완효성 칼리비료로 활용하기 위한 기초연구로, 전로슬래그 분말에 시약급 $SiO_2$$K_2CO_3$를 첨가하여 염기도를 각각 0.7, 1.0및 1.4로 조절하고, $K_2O$의 함량은 22mass%로 고정한 후 볼밀에서 24시간 이상 혼합하여 $900^{\circ}C{\sim}1000^{\circ}C$ 사이의 온도에서 10분${\sim}$60분 동안 소결하였다. 소결 후 X-선 회절과 ICP분석을 이용하여 제조된 칼리비료의 특성을 조사하고 또한 염기도, 소결온도 및 소결시간이 완효성 칼리비료의 제조 조건에 미치는 영향을 검토하였다. 소결체의 수용성 $K_2O$의 용출특성은 소결시간이 길어질수록, 소결온도가 높아질수록, 염기도가 감소할수록 용출율이 감소하였다. 한편 구용성 $K_2O$의 용출특성은 염기도가 증가할수록 증가하는 경향이 뚜렷하였으며, 소결온도가 높을수록 용출율은 완만하게 감소하였다.

Keywords

References

  1. Yasuko Yao, et al., 2000: Development of Slow Release Potassium Fertilizer, NKK 技報, (172), pp. 34-38
  2. 川島健,渡邊 圭見, 2000: ク溶性カリ肥料の製造方法, 日本特許, JP2000-226284
  3. 越野正義, 1996: 言羊細肥料試驗法, 養賢堂(東京), pp 109-170
  4. Yasuko Yao and Takashi Akiyama, 2001 : Solubility and Mineral Composition of Fused Potassium Silicate Fertilizer, Jpn. J. Soi. Plant Nutr., 72, pp. 775-779
  5. Yasuko Yao, Tadakatsu Yoneyama & Hiroaki Hayashi, 2003 : Potassium uptake by Chinese cabbage from fused potassium silicate, a slow-releasing fertilizer, Plant and Soil, 249, pp. 279-286 https://doi.org/10.1023/A:1022841017303
  6. Takashi Akiyama, Yasuko Yao and Seiichi Matesuno, 2001 : A Major Compound in Fused Potassium Silicate Fertilizer, Jpn. J. Soil Sci. Plnat Nutr., 72, pp. 25-32