還元性雰囲気下でのりん蒸気の固体鉄への移行速度

概要

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Transport rate of gaseous phosphorus into solid iron under a reducing atmosphere was observed by a weighing method, to obtain fundamental data to discuss transport mechanism of phosphorus into reduced iron in a blast furnace. A kind of killed and rolled steel sheet and non worked electrolytic iron sheet were used. Partial pressures of phosphorus vapor were controlled by using equilibrium relation between Ca_3(PO_4)_2, SiO_2, C, CaSiO_3 and CO. Phosphorus partial pressure and temperature were every one order between 4×10^<-6> and 4×10^<-2> atm, and every 50℃ between 900 and 1050℃, respectively. Experimental results are as follows : 1. The transport rate obeyed a parabolic rate law. 2. Relations between the rate constant of the parabolic rate law, κ, phosphorus partial pressure, P_<P2>, and temperature, T, are as follows : In the case of killed steel, log κ = 0.14 logP_<P2>+5.68-15.6×10^3/T In the case of electrolytic iron, log κ=0.14logP_<P2>+4.94-15.6×10^3/T 3. Reaction product on the surface of the solid iron was Fe_2P.
社団法人日本鉄鋼協会の論文
1991-12-01