A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
RAW MATERIAL FOR PHOSPHATE FERTILIZER AND PRODUCTION METHOD THEREOF
PROBLEM TO BE SOLVED: To provide a raw material for phosphate fertilizers which has high fertilizer effects, although containing phosphorus in molten iron and iron oxide originated from, e.g. phosphoric acid from steel slag, and its production method.SOLUTION: A raw material for phosphate fertilizers contains CaO, SiO, POand iron oxide (based on Fe) in a total amount of 60 mass% or higher, has a basicity α, in terms of the weight concentration ratio of CaO and SiO, of 0.8-2.0 and includes 5 mass% or higher and (-6α+27α-6) mass% or lower of POand 5-25 mass%, based on Fe, of iron oxide. In the raw material for phosphate fertilizers, the total of abundance ratios of one or more of the solid solution of Ca(PO)-CaSiO, 5CaO.SiO.POand 7CaO.2SiO.POis 15 mass% or higher. Molten slag of 1,000-1,700°C having the above composition is cooled at 10°C/min or higher.
【課題】溶銑中のリンや製鋼スラグ中のリン酸等から酸化鉄を含むが、肥料効果の高いリン酸肥料原料とその製造方法の提供。【解決手段】ＣａＯ、ＳｉＯ2、Ｐ2Ｏ5、及び、酸化鉄（Ｆｅ換算）を合計で６０質量％以上含有し、ＣａＯとＳｉＯ2の重量濃度比で表示する塩基度αが０．８〜２．０であり、Ｐ2Ｏ5を５質量％以上（−６α2＋２７α−６）質量％以下、酸化鉄をＦｅ換算で５〜２５質量％含有するリン酸肥料原料であって、前記リン酸肥料原料中、Ｃａ3（ＰＯ4）2−Ｃａ2ＳｉＯ4固溶体、５ＣａＯ・ＳｉＯ2・Ｐ2Ｏ5、及び、７ＣａＯ・２ＳｉＯ2・Ｐ2Ｏ5の１種又は２種以上の存在比の合計が１５質量％以上であることを特徴とするリン酸肥料原料。上記組成の、１０００〜１７００℃の溶融スラグを１０℃／ｍｉｎ以上で冷却する。【選択図】なし
RAW MATERIAL FOR PHOSPHATE FERTILIZER AND PRODUCTION METHOD THEREOF
PROBLEM TO BE SOLVED: To provide a raw material for phosphate fertilizers which has high fertilizer effects, although containing phosphorus in molten iron and iron oxide originated from, e.g. phosphoric acid from steel slag, and its production method.SOLUTION: A raw material for phosphate fertilizers contains CaO, SiO, POand iron oxide (based on Fe) in a total amount of 60 mass% or higher, has a basicity α, in terms of the weight concentration ratio of CaO and SiO, of 0.8-2.0 and includes 5 mass% or higher and (-6α+27α-6) mass% or lower of POand 5-25 mass%, based on Fe, of iron oxide. In the raw material for phosphate fertilizers, the total of abundance ratios of one or more of the solid solution of Ca(PO)-CaSiO, 5CaO.SiO.POand 7CaO.2SiO.POis 15 mass% or higher. Molten slag of 1,000-1,700°C having the above composition is cooled at 10°C/min or higher.
【課題】溶銑中のリンや製鋼スラグ中のリン酸等から酸化鉄を含むが、肥料効果の高いリン酸肥料原料とその製造方法の提供。【解決手段】ＣａＯ、ＳｉＯ2、Ｐ2Ｏ5、及び、酸化鉄（Ｆｅ換算）を合計で６０質量％以上含有し、ＣａＯとＳｉＯ2の重量濃度比で表示する塩基度αが０．８〜２．０であり、Ｐ2Ｏ5を５質量％以上（−６α2＋２７α−６）質量％以下、酸化鉄をＦｅ換算で５〜２５質量％含有するリン酸肥料原料であって、前記リン酸肥料原料中、Ｃａ3（ＰＯ4）2−Ｃａ2ＳｉＯ4固溶体、５ＣａＯ・ＳｉＯ2・Ｐ2Ｏ5、及び、７ＣａＯ・２ＳｉＯ2・Ｐ2Ｏ5の１種又は２種以上の存在比の合計が１５質量％以上であることを特徴とするリン酸肥料原料。上記組成の、１０００〜１７００℃の溶融スラグを１０℃／ｍｉｎ以上で冷却する。【選択図】なし
RAW MATERIAL FOR PHOSPHATE FERTILIZER AND PRODUCTION METHOD THEREOF
リン酸肥料原料及びその製造方法
SAKAMOTO MOTOHIRO (author) / SASAKI NAOTO (author) / OGAWA YUJI (author) / HARADA TOSHIYA (author) / ITO KIMIO (author) / MANABE KAYO (author)
2015-11-02
Patent
Electronic Resource
Japanese
Soluble phosphate fertilizer production using acid effluent from metallurgical industry
| Online Contents | 2016
Utilization of phosphate fertilizer industry waste for belite-ferroaluminate cement production
| British Library Online Contents | 2013
| European Patent Office | 2020