炭酸ナトリウムによる高炭素溶鉄の脱りん,脱炭反応

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タイトル別名
  • Dephosphorization and Decarburization of High Carbon Iron Melts by Sodium Carbonate
  • タンサン ナトリウム ニ ヨル コウ タンソ ヨウテツ ノ ダツリン ダッタン

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説明

In order to get a basic knowledge concerning dephosphorization of hot metal by soda ash, the behavior of phosphorus and carbon in metal and gases evolved during the reaction was examined.<BR>Sodium carbonate explosively reacted with liquid iron containing 3 5% carbon. Gaseous material evolved by the reaction was only carbon monoxide.<BR>When sodium carbonate was added to liquid 4%carbon-0.2%phosphorus-iron, dephosphorizing reaction rapidly occurred within the first few minutes. While, decarburizing reaction began at around the period when dephosphorization was almost completed. Only a small amount of carbon dioxide gas evolved early in the experiment, gaseous material evolved over a run was mainly carbon monoxide.<BR>It was presumed from the relation between the amounts of carbon monoxide gas evolved and phosphrus removed that the dephosphorizing reaction of high carbon iron melt can be expressed as follows ;<BR>5Na2CO3 + 2P = 5Na2O + P2O5 + 5CO <BR>The reactions ofdephosphorization and decarburization were retarded by the addition of sodium disilicate together with sodium carbonate.<BR>It was found that the phosphate capacity of high sodium carbonate flux was very low compared with those of Na2O- SiO2 fluxes.

収録刊行物

  • 鉄と鋼

    鉄と鋼 76 (9), 1480-1487, 1990

    一般社団法人 日本鉄鋼協会

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