砂鐵に含有するヴアナジユウムの還元に關する研究
スポンサーリンク
概要
- 論文の詳細を見る
It is a well known fact that the addition of a very small amount of vanadium improves the quality of steel, increasing its strength as well as ductility. Unfortunately, however, the occurrence of this precious element in its available forms of compounds is very scarce, and can not satisfy metallurgical demands. The price of Ferro-vanadium, consequently, is very high, so that it forms an almost insurmountable obstacle in the course of developing the manufacture of vanadium steel. The magnetic sand in Japan, without exception, contains certain quantities of V_2O_5, which sometimes exceed 0.6% in the original ore with a high iron content. Though the physical condition of the existence of V_2O_5 in the magnetic sand has not yet been cleared, when we apply the magnetic separation for the dressing of magnetic sand, nearly all the content of V_2O_5 enters into the concentrate, resulting in a higher percentage of V_2O_5 in it than in the original ore. From an economical point of view, the utilization of this element in the concentrate (or in the ore) affords a splendid prospect in the refining of magnetic sand, giving a superior quality to the product. The author carried out several researches for reducing the V_2O_5 in magnetic sand with an electric furnace. Naturally, varying degrees of reduction of V_2O_5 into the iron from the sand might give remarkable variations on the quality of the product as well as their composition, say, phosphorus, mangan, silicon, titan and carbon. The results of the author's research are summarized as follows : (1). In the direct reduction of V_2O_5 from the fused mass in the electric furnace, the slag must have certain definite ratios of SiO_2 and CaO to reduce the V_2O_5 as perfectly as possible. In this case, the TiO_2 and Al_2O_3 are considered as neutrals, and the reduction of TiO_2 must be excluded as much as possible. (2). For the above purpose, the slag should preferably have a composition approximating Bisilicate slag. (3). The absorption of carbon by the iron produced at certain temperature depends on the basicity of the slag and the length of time held in the furnace. (4). The vanadium content will accelerate the absorption of carbon in the iron produced.
- 社団法人日本鉄鋼協会の論文
- 1931-10-25
著者
関連論文
- 含ニツケルクロム鐵鑛の處理に關する研究 (IV) : ニツケルコバルト分離の研究
- 含ニッケルークロム鐵鑛處理の研究 (III) : 高壓淨液工程の研究
- 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
- 電氣爐銑中のマンガンの還元機構
- 電氣製鋼用弧光爐の設計に關する一基礎的研究(日本鐵鋼協會第九回研究部會第五回製鋼部會議事録)
- 熔銑中の炭素溶解度に關する小實驗
- 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