熔鋼中の水素に関する研究 (III) : 鋼滓含有水素の定量について

概要

論文の詳細を見る
A study was made of vacuum heating method up to 1200℃, and vacuum fusion method up to 1800℃ in a graphite or Mo crucible for determination of hydrogen content in steelmaking slag. To analyse the gas extracted by vacuum fusion of the specimen, thermoconductivity method was applied, the accuracy of which was improved by means of new type thermoconductivity cells, made from thin Cu tubes dipped in ice water which was stirred by an impeller and separated from contact with ice by a network. The following conclusions were reached : 1) Hydrogen in steelmaking slag could not be extracted completely by vacuum heating only up to 1200℃ for complete extraction of hydrogen. It should be heated to above 1400℃ or its melting point. 2) H_2O in the specimen was quantitatively decomposed in the vacuum furnace and extracted as H_2 when it was melted in a graphite crucible. This fact was confirmed by extracting H_2 in minerals such as gypsum and actinolite. 3) Strong adsorption of H_2 caused by vaporization of reduced material of slag specimen in the vacuum furnace was found, when it was heated at high temperature in a graphite crucible. The effect was minimized, on the contrary, when a Mo crucible was used. 4) Vacuum fusion method with Mo crucible was made available for the purpose stated above.
社団法人日本鉄鋼協会の論文
1956-08-01