電氣爐に於ける白銑及び鼠銑の生成因子並に黒鉛化の機構に關する研究

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概要

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• M Mukaiyama Formation of the white and gray pig iron in the electric furnace reduction of the magnetic sand and the mechanism of the Graphitization of the pig iron in the process. Synopsis. The pig iron can be devided into two groups, white and gray pig iron. The former is not only poor in the Silicon and free carbon (graphite) contents, in general, but the carbon content remains in the combined form of cementite Fe_3C with iron. The fracture is quite lustrous, white, and freak, It is very hard and brittle. The latter is quite softer and stronger than the white pig and used for the castings. It is remarkably rich in Silicon and graphite and the colour of the fracture is gray. The writer's experiments in the Electric reduction of the magnetic sand have shown the existence of the critical temperatures for the formation of both kinds of iron, white and gray. The temperature ranges are 1, 450-1, 500℃ at the formation or the smelting zone. The deviations of the temperatures are chiefly due to the slag compositions. The gray iron can never be made under nor the white iron above the temperatures. Referring to these facts, he suggests of the principle of the production of the low silicon, and high carbon pig iron in the blast furnace process. The writer made the explanation of the mechanism of the graphitization of the pig iron during its formation in the furnace. He says that the reduction of the silicon above the critical temperature diminishes the solubility of the cementite in iron and consequently cementite decomposes into iron and colloidal graphite. The distribution of the graphite is quite uniform throughout the molten iron. The state of the graphite after cooling is totally depending upon the composition, temperature of the melt, and the rate of cooling. The effects of the quantity of Si and Mn in the iron are also shown micrographically.

• 社団法人日本鉄鋼協会の論文
• 1931-01-25

著者

• 向山 幹夫

  大東亞省囑託

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• 含ニツケル-クロム鐵鑛の處理に關する研究(第 II 報) : クロム分離の研究
• 含ニッケルクロム鐵鑛の處理に關する研究 (I) : 高温高壓液化法の研究
• 紫鑛利用に關する一新研究
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• 電氣爐銑鐵製造の理論的研究
• 砂鐵の電氣熔融製錬に於ける各種還元劑の効果に關する研究(A. 電氣爐に依る製錬, 附録 第六囘研究部會議事録(第二囘砂鐵部會))
• 砂鐵に含有するヴアナジユウムの還元に關する研究
• 砂鐵の電氣製錬に就て(附録 日本鐵鋼協會第五囘研究部會議事録 砂鐵部會)
• 砂鐵の電氣製錬に關する研究概要
• 電氣爐に於ける白銑及び鼠銑の生成因子並に黒鉛化の機構に關する研究
• 砂鐵鑛濕式製錬に關する基礎的研究
• 製鋼作業上に於ける熔銑の酸化に關する理論的考察

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