Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
HIGH PHOSPHORUS-CONTAINING SLAG, MANUFACTURING METHOD OF SLAG-BASED FERTILIZER, AND PHOSPHATE FERTILIZER
To provide a manufacturing method for providing high phosphorus-containing slag easy to use as a phosphorus resource, from steel slag.SOLUTION: A high phosphorus-containing slag is manufactured through: a first process for reduction treating steel slag containing phosphorous generated in a steel-making refining process, and reducing iron oxide in the steel slag to recover the same as a phosphorous-containing molten iron; a second process for dephosphorylation treating the phosphorus-containing molten iron obtained in the first process to recover resulting high phosphorus slag; a third process for heating the high phosphorus slag obtained in the second process at a temperature of 1500°C or higher to separate it into two liquid phases, and recovering ultra high phosphorus slag in an upper layer; and a fourth process for using the ultra high phosphorus slag obtained in the third process as it is, or conducting at least one of methods of a magnetic separation, a floatation separation, and a gravity separation to obtain a slag having phosphoric acid of 30 mass% or more, and an iron component of less than 10 mass% (in terms of Fe).SELECTED DRAWING: Figure 1
【課題】製鋼スラグから、リン資源として活用しやすい高リン含有スラグを得る製造方法の提供。【解決手段】製鋼精錬プロセスにおいて発生したリンを含有する製鋼スラグを、還元処理し、該製鋼スラグ中の鉄酸化物を還元しリン含有溶融鉄として回収する第一の工程と、前記第一の工程で得られたリン含有溶融鉄を脱リン処理し、得られた高リンスラグを回収する第二の工程と、前記第二の工程で得られた高リンスラグを、１５００℃以上の温度に加熱して二液相分離し、上層の超高リンスラグを回収する第三の工程と、前記第三の工程で得られた超高リンスラグを、そのまま、あるいは磁力選鉱、浮遊選鉱および比重分離のうち少なくともいずれか１つの方法を実施して、リン酸３０質量％以上と、鉄分１０質量％(Ｆｅ換算)未満を含有するスラグを得る第四の工程とを経て、高リン含有スラグを製造する。【選択図】図１
HIGH PHOSPHORUS-CONTAINING SLAG, MANUFACTURING METHOD OF SLAG-BASED FERTILIZER, AND PHOSPHATE FERTILIZER
To provide a manufacturing method for providing high phosphorus-containing slag easy to use as a phosphorus resource, from steel slag.SOLUTION: A high phosphorus-containing slag is manufactured through: a first process for reduction treating steel slag containing phosphorous generated in a steel-making refining process, and reducing iron oxide in the steel slag to recover the same as a phosphorous-containing molten iron; a second process for dephosphorylation treating the phosphorus-containing molten iron obtained in the first process to recover resulting high phosphorus slag; a third process for heating the high phosphorus slag obtained in the second process at a temperature of 1500°C or higher to separate it into two liquid phases, and recovering ultra high phosphorus slag in an upper layer; and a fourth process for using the ultra high phosphorus slag obtained in the third process as it is, or conducting at least one of methods of a magnetic separation, a floatation separation, and a gravity separation to obtain a slag having phosphoric acid of 30 mass% or more, and an iron component of less than 10 mass% (in terms of Fe).SELECTED DRAWING: Figure 1
【課題】製鋼スラグから、リン資源として活用しやすい高リン含有スラグを得る製造方法の提供。【解決手段】製鋼精錬プロセスにおいて発生したリンを含有する製鋼スラグを、還元処理し、該製鋼スラグ中の鉄酸化物を還元しリン含有溶融鉄として回収する第一の工程と、前記第一の工程で得られたリン含有溶融鉄を脱リン処理し、得られた高リンスラグを回収する第二の工程と、前記第二の工程で得られた高リンスラグを、１５００℃以上の温度に加熱して二液相分離し、上層の超高リンスラグを回収する第三の工程と、前記第三の工程で得られた超高リンスラグを、そのまま、あるいは磁力選鉱、浮遊選鉱および比重分離のうち少なくともいずれか１つの方法を実施して、リン酸３０質量％以上と、鉄分１０質量％(Ｆｅ換算)未満を含有するスラグを得る第四の工程とを経て、高リン含有スラグを製造する。【選択図】図１
HIGH PHOSPHORUS-CONTAINING SLAG, MANUFACTURING METHOD OF SLAG-BASED FERTILIZER, AND PHOSPHATE FERTILIZER
高リン含有スラグおよびスラグ系肥料の製造方法ならびにリン酸肥料
KOBAYASHI SAKI (Autor:in) / TAKAHASHI KATSUNORI (Autor:in)
10.10.2019
Patent
Elektronische Ressource
Japanisch
IPC:
C04B
Kalk
,
LIME
/
C05B
Phosphatische Düngemittel
,
PHOSPHATIC FERTILISERS
/
C05D
INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C
,
Anorganische, nicht von den Unterklassen C05B, C05C umfasste Düngemittel
/
C21C
Weiterverarbeiten von Roheisen, z.B. Feinen, Herstellen von Schweißeisen oder Stahl
,
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL
| Europäisches Patentamt | 2019
| Europäisches Patentamt | 2019
| Europäisches Patentamt | 2015