Si 脱酸一次生成物の静止鉄浴中における浮上速度と凝集性について

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For the deoxidation of iron melt with silicon, a study has been made to investigate the floating-up velocity of the particles of the primary product in the static iron bath and the coagulation of them on the way of floating-up. The results obtained are as follows; 1) The floating-up velocity of the particles of the primary product consisting of components SiO_2 and FeO obeys better a velocity equation ν= (3/2) (⊿ρ・g/18η)χ^2 rather than Stokes' equation ν=(⊿ρ・g/18η)χ^2, where χ is radius of a particle. 2) The so called "local reaction heat effect" is possible to stimulate the growth of the primary products by coagulation in the early period of deoxidation. Therefore, when the amount of reactant of added silicon is large which would increase the heat effect, and the agitation is strong, the number of coarse particles will increase. As a result, the separation of the primary product from the bath becomes more rapid with the increase of added silicon. 3) When the amount of added silicon is small, the coagulation of the products is poor in the early period of deoxidation because of the small heat effect. However, the separation of the products is as rapid as in the case of the large amount of added silicon, for there is some composition range favourable for the coagulation on the way of floating up in the bath. 4) The amount of added silicon does not essentially affect the floating-up removal rate of the primary product in high silicon range. 5) When the concentration of the suspension of the inclusion particles in the bath is high, all the particles contribute almost equally to the coagulation on the way of floating up independently of radii. 6) In case that the primary deoxidation products are some oxide mixtures, the constitution of chemical composition of the particles has a considerable influence on the floating-up removal rate from the bath.
社団法人日本鉄鋼協会の論文
1969-01-01

Si 脱酸一次生成物の静止鉄浴中における浮上速度と凝集性について

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