RAW MATERIAL FOR SILICATE PHOSPHATE FERTILIZER AND METHOD FOR PRODUCTION THEREOF
A raw material for a silicate phosphate fertilizer comprising a slag recovered in a pre−treatment process for a blast furnace hot−metal which contains silicates as oxides of silicon in the hot−metal and phosphates as oxides of phosphorus and contains acid−soluble silicic acid in an amount of 10 mass...
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| creator | TAKAHASHI, TATSUHITO WATANABE, KEIJI INOUE, SHIGERU YAO, YASUKO |
| description | A raw material for a silicate phosphate fertilizer comprising a slag recovered in a pre−treatment process for a blast furnace hot−metal which contains silicates as oxides of silicon in the hot−metal and phosphates as oxides of phosphorus and contains acid−soluble silicic acid in an amount of 10 mass % or more; and a method for producing the raw material which comprises adding a CaO source and an oxygen source to the hot−metal in the pre−treatment process for a blast furnace hot−metal to effect the oxidation of silicon and the dephosphorization of the hot−metal, and recovering a slag containing silicates and phosphates formed by the above reactions, followed by solidification, to thereby produce a slag containing acid−soluble silicic acid in an amount of 10 mass % or more and also phosphates. The raw material has excellent properties as a fertilizer, since it exhibits excellent characteristics of dissolution of silicates and improved absorption of silicates by a plant, due to the effect of co−existing phosphates, and also acts as a phosphate fertilizer, and it can be produced at a markedly reduced cost since the slag recovered in a pre−treatment process for a hot−metal can be used as it is.
A raw material for a silicate phosphate fertilizer comprising a slag recovered in a pre-treatment process for a blast furnace hot-metal which contains silicates as oxides of silicon in the hot-metal and phosphates as oxides of phosphorus and contains acid-soluble silicic acid in an amount of 10 mass % or more and a method for producing the raw material which comprises adding a CaO source and an oxygen source to the hot-metal in the pre-treatment process for a blast furnace hot-metal to effect the oxidation of silicon and the dephosphorization of the hot-metal, and recovering a slag containing silicates and phosphates formed by the above reactions, followed by solidification, to thereby produce a slag containing acid-soluble silicic acid in an amount of 10 mass % or more and also phosphates. The raw material has excellent properties as a fertilizer, since it exhibits excellent characteristics of dissolution of silicates and improved absorption of silicates by a plant, due to the effect of co-existing phosphates, and also acts as a phosphate fertilizer, and it can be produced at a markedly reduced cost since the slag recovered in a pre-treatment process for a hot-metal can be used as it is.
La présente invention concerne un fertilisant de phosphate de silicate comprenant u |
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A raw material for a silicate phosphate fertilizer comprising a slag recovered in a pre-treatment process for a blast furnace hot-metal which contains silicates as oxides of silicon in the hot-metal and phosphates as oxides of phosphorus and contains acid-soluble silicic acid in an amount of 10 mass % or more and a method for producing the raw material which comprises adding a CaO source and an oxygen source to the hot-metal in the pre-treatment process for a blast furnace hot-metal to effect the oxidation of silicon and the dephosphorization of the hot-metal, and recovering a slag containing silicates and phosphates formed by the above reactions, followed by solidification, to thereby produce a slag containing acid-soluble silicic acid in an amount of 10 mass % or more and also phosphates. The raw material has excellent properties as a fertilizer, since it exhibits excellent characteristics of dissolution of silicates and improved absorption of silicates by a plant, due to the effect of co-existing phosphates, and also acts as a phosphate fertilizer, and it can be produced at a markedly reduced cost since the slag recovered in a pre-treatment process for a hot-metal can be used as it is.
La présente invention concerne un fertilisant de phosphate de silicate comprenant un laitier récupéré dans un procédé de prétraitement pour une coulée de haut-fourneau contenant des silicates sous forme d'oxydes de silicium et des phosphates sous forme d'oxydes de phosphores et renfermant un acide silicique soluble dans l'acide en une quantité d'au moins 10 % en pourcentage massique. L'invention concerne également un procédé permettant la production de la matière première qui comporte l'ajout d'une source de CaO et d'une source d'oxygène à la coulée dans le processus de prétraitement pour une coulée de haut-fourneau pour réaliser l'oxydation du silicium et la déphosphoration de la fonte, et la récupération d'un laitier contenant des silicates et des phosphates formés par lesdites réactions, suivie d'une solidification, afin de produire un laitier renfermant un acide silicique soluble dans l'acide en une quantité d'au moins 10 % en pourcentage massique et également des phosphates. La matière première présente d'excellentes propriétés en tant que fertilisant, étant donné qu'elle présente d'excellentes caractéristiques de dissolution de silicates et une absorption améliorée par les plantes, due à l'effet des phosphates présents, et elle agit également en tant que fertilisant phosphaté, et il peut être produit à un coût considérablement réduit étant donné que le laitier récupéré dans un processus de prétraitement de coulée peut être utilisé tel quel.</description><edition>7</edition><language>eng ; fre ; jpn</language><subject>CHEMISTRY ; FERTILISERS ; MANUFACTURE THEREOF ; METALLURGY ; PHOSPHATIC FERTILISERS</subject><creationdate>2003</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20030508&DB=EPODOC&CC=WO&NR=03037824A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20030508&DB=EPODOC&CC=WO&NR=03037824A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>TAKAHASHI, TATSUHITO</creatorcontrib><creatorcontrib>WATANABE, KEIJI</creatorcontrib><creatorcontrib>INOUE, SHIGERU</creatorcontrib><creatorcontrib>YAO, YASUKO</creatorcontrib><title>RAW MATERIAL FOR SILICATE PHOSPHATE FERTILIZER AND METHOD FOR PRODUCTION THEREOF</title><description>A raw material for a silicate phosphate fertilizer comprising a slag recovered in a pre−treatment process for a blast furnace hot−metal which contains silicates as oxides of silicon in the hot−metal and phosphates as oxides of phosphorus and contains acid−soluble silicic acid in an amount of 10 mass % or more; and a method for producing the raw material which comprises adding a CaO source and an oxygen source to the hot−metal in the pre−treatment process for a blast furnace hot−metal to effect the oxidation of silicon and the dephosphorization of the hot−metal, and recovering a slag containing silicates and phosphates formed by the above reactions, followed by solidification, to thereby produce a slag containing acid−soluble silicic acid in an amount of 10 mass % or more and also phosphates. The raw material has excellent properties as a fertilizer, since it exhibits excellent characteristics of dissolution of silicates and improved absorption of silicates by a plant, due to the effect of co−existing phosphates, and also acts as a phosphate fertilizer, and it can be produced at a markedly reduced cost since the slag recovered in a pre−treatment process for a hot−metal can be used as it is.
A raw material for a silicate phosphate fertilizer comprising a slag recovered in a pre-treatment process for a blast furnace hot-metal which contains silicates as oxides of silicon in the hot-metal and phosphates as oxides of phosphorus and contains acid-soluble silicic acid in an amount of 10 mass % or more and a method for producing the raw material which comprises adding a CaO source and an oxygen source to the hot-metal in the pre-treatment process for a blast furnace hot-metal to effect the oxidation of silicon and the dephosphorization of the hot-metal, and recovering a slag containing silicates and phosphates formed by the above reactions, followed by solidification, to thereby produce a slag containing acid-soluble silicic acid in an amount of 10 mass % or more and also phosphates. The raw material has excellent properties as a fertilizer, since it exhibits excellent characteristics of dissolution of silicates and improved absorption of silicates by a plant, due to the effect of co-existing phosphates, and also acts as a phosphate fertilizer, and it can be produced at a markedly reduced cost since the slag recovered in a pre-treatment process for a hot-metal can be used as it is.
La présente invention concerne un fertilisant de phosphate de silicate comprenant un laitier récupéré dans un procédé de prétraitement pour une coulée de haut-fourneau contenant des silicates sous forme d'oxydes de silicium et des phosphates sous forme d'oxydes de phosphores et renfermant un acide silicique soluble dans l'acide en une quantité d'au moins 10 % en pourcentage massique. L'invention concerne également un procédé permettant la production de la matière première qui comporte l'ajout d'une source de CaO et d'une source d'oxygène à la coulée dans le processus de prétraitement pour une coulée de haut-fourneau pour réaliser l'oxydation du silicium et la déphosphoration de la fonte, et la récupération d'un laitier contenant des silicates et des phosphates formés par lesdites réactions, suivie d'une solidification, afin de produire un laitier renfermant un acide silicique soluble dans l'acide en une quantité d'au moins 10 % en pourcentage massique et également des phosphates. La matière première présente d'excellentes propriétés en tant que fertilisant, étant donné qu'elle présente d'excellentes caractéristiques de dissolution de silicates et une absorption améliorée par les plantes, due à l'effet des phosphates présents, et elle agit également en tant que fertilisant phosphaté, et il peut être produit à un coût considérablement réduit étant donné que le laitier récupéré dans un processus de prétraitement de coulée peut être utilisé tel quel.</description><subject>CHEMISTRY</subject><subject>FERTILISERS</subject><subject>MANUFACTURE THEREOF</subject><subject>METALLURGY</subject><subject>PHOSPHATIC FERTILISERS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2003</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZAgIcgxX8HUMcQ3ydPRRcPMPUgj29PF0BgooBHj4Bwd4gFhurkEhQNEo1yAFRz8XBV_XEA9_F7DigCB_l1DnEE9_P4UQD9cgV383HgbWtMSc4lReKM3NoOjmGuLsoZtakB-fWlyQmJyal1oSH-5vYGxgbG5hZOJoaEyMGgB-HS9C</recordid><startdate>20030508</startdate><enddate>20030508</enddate><creator>TAKAHASHI, TATSUHITO</creator><creator>WATANABE, KEIJI</creator><creator>INOUE, SHIGERU</creator><creator>YAO, YASUKO</creator><scope>EVB</scope></search><sort><creationdate>20030508</creationdate><title>RAW MATERIAL FOR SILICATE PHOSPHATE FERTILIZER AND METHOD FOR PRODUCTION THEREOF</title><author>TAKAHASHI, TATSUHITO ; WATANABE, KEIJI ; INOUE, SHIGERU ; YAO, YASUKO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_WO03037824A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; jpn</language><creationdate>2003</creationdate><topic>CHEMISTRY</topic><topic>FERTILISERS</topic><topic>MANUFACTURE THEREOF</topic><topic>METALLURGY</topic><topic>PHOSPHATIC FERTILISERS</topic><toplevel>online_resources</toplevel><creatorcontrib>TAKAHASHI, TATSUHITO</creatorcontrib><creatorcontrib>WATANABE, KEIJI</creatorcontrib><creatorcontrib>INOUE, SHIGERU</creatorcontrib><creatorcontrib>YAO, YASUKO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>TAKAHASHI, TATSUHITO</au><au>WATANABE, KEIJI</au><au>INOUE, SHIGERU</au><au>YAO, YASUKO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>RAW MATERIAL FOR SILICATE PHOSPHATE FERTILIZER AND METHOD FOR PRODUCTION THEREOF</title><date>2003-05-08</date><risdate>2003</risdate><abstract>A raw material for a silicate phosphate fertilizer comprising a slag recovered in a pre−treatment process for a blast furnace hot−metal which contains silicates as oxides of silicon in the hot−metal and phosphates as oxides of phosphorus and contains acid−soluble silicic acid in an amount of 10 mass % or more; and a method for producing the raw material which comprises adding a CaO source and an oxygen source to the hot−metal in the pre−treatment process for a blast furnace hot−metal to effect the oxidation of silicon and the dephosphorization of the hot−metal, and recovering a slag containing silicates and phosphates formed by the above reactions, followed by solidification, to thereby produce a slag containing acid−soluble silicic acid in an amount of 10 mass % or more and also phosphates. The raw material has excellent properties as a fertilizer, since it exhibits excellent characteristics of dissolution of silicates and improved absorption of silicates by a plant, due to the effect of co−existing phosphates, and also acts as a phosphate fertilizer, and it can be produced at a markedly reduced cost since the slag recovered in a pre−treatment process for a hot−metal can be used as it is.
A raw material for a silicate phosphate fertilizer comprising a slag recovered in a pre-treatment process for a blast furnace hot-metal which contains silicates as oxides of silicon in the hot-metal and phosphates as oxides of phosphorus and contains acid-soluble silicic acid in an amount of 10 mass % or more and a method for producing the raw material which comprises adding a CaO source and an oxygen source to the hot-metal in the pre-treatment process for a blast furnace hot-metal to effect the oxidation of silicon and the dephosphorization of the hot-metal, and recovering a slag containing silicates and phosphates formed by the above reactions, followed by solidification, to thereby produce a slag containing acid-soluble silicic acid in an amount of 10 mass % or more and also phosphates. The raw material has excellent properties as a fertilizer, since it exhibits excellent characteristics of dissolution of silicates and improved absorption of silicates by a plant, due to the effect of co-existing phosphates, and also acts as a phosphate fertilizer, and it can be produced at a markedly reduced cost since the slag recovered in a pre-treatment process for a hot-metal can be used as it is.
La présente invention concerne un fertilisant de phosphate de silicate comprenant un laitier récupéré dans un procédé de prétraitement pour une coulée de haut-fourneau contenant des silicates sous forme d'oxydes de silicium et des phosphates sous forme d'oxydes de phosphores et renfermant un acide silicique soluble dans l'acide en une quantité d'au moins 10 % en pourcentage massique. L'invention concerne également un procédé permettant la production de la matière première qui comporte l'ajout d'une source de CaO et d'une source d'oxygène à la coulée dans le processus de prétraitement pour une coulée de haut-fourneau pour réaliser l'oxydation du silicium et la déphosphoration de la fonte, et la récupération d'un laitier contenant des silicates et des phosphates formés par lesdites réactions, suivie d'une solidification, afin de produire un laitier renfermant un acide silicique soluble dans l'acide en une quantité d'au moins 10 % en pourcentage massique et également des phosphates. La matière première présente d'excellentes propriétés en tant que fertilisant, étant donné qu'elle présente d'excellentes caractéristiques de dissolution de silicates et une absorption améliorée par les plantes, due à l'effet des phosphates présents, et elle agit également en tant que fertilisant phosphaté, et il peut être produit à un coût considérablement réduit étant donné que le laitier récupéré dans un processus de prétraitement de coulée peut être utilisé tel quel.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| title | RAW MATERIAL FOR SILICATE PHOSPHATE FERTILIZER AND METHOD FOR PRODUCTION THEREOF |
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