Title:
Phosphate fertilizer materials, a phosphate fertilizer, and a manufacturing method for the same
Document Type and Number:
Japanese Patent JP6003911
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a phosphoric acid fertilizer raw material having high fertilizer effect by using steel making slag generated in a steel making process.SOLUTION: A high phosphorus hot pig iron obtained by conducting a reduction treatment on steel making slag containing phosphorus generated in a steel making refining process and produced slag is used as a phosphoric acid fertilizer raw material. Slag contains at least CaO, POand SiO, having a composite with PO:15% or more and the total amount of CaO, POand SiOis 50% or more by mass% based on the total amount of the slag, CaO:50 to 65%, PO:15% or more and SiOof less than 10% by mass% in a ternary system of CaO, POand SiO, preferably mainly containing CaO-PO-based crystal having a crystal structure of α-Ca(PO)and/or CaO(PO)and soluble phosphate of 4.5% or more by mass% based on the total amount of the slag. The slag becomes a phosphoric acid fertilizer raw material excellent in plant growth condition and fertilizer effect.
Inventors:
Yasuko Yao
Osaka Tomoya
Naoki Kikuchi
Akitoshi Matsui
Yuichi Uchida
Osaka Tomoya
Naoki Kikuchi
Akitoshi Matsui
Yuichi Uchida
Application Number:
JP2014015546A
Publication Date:
October 05, 2016
Filing Date:
January 30, 2014
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C05B13/00; B09B3/00
Domestic Patent References:
| JP2009132544A | ||||
| JP2005060846A | ||||
| JP2011208277A | ||||
| JP2008223095A | ||||
| JP2013142046A | ||||
| JP62226883A |
Foreign References:
| WO2002092537A1 | ||||
| GB1160125A |
Attorney, Agent or Firm:
Kenichiro Ochiai