鑄鐵の脱硫に關する研究

抄録

(1) The use of about 5% Calcium Silicide (Ca Si) preheated powder n the ladle of the cupola furnace improves the desulphurisingaction for the molten east iron, and increases its tensile strength slightly. Si content increases slightly and total carbon and manganese content decreases slightly by addition of CaSi powder in the ladle,
(2) The use of CaSi powder n the ladle cannot eliminate the blow hole completely, as CaSi contains a little amount of gas which remains still after the preheating.
(3) The use of abont 5% calcium silicide lump from the charging door of the furnace improves the desulphurising action for the molten cast iron not remarkably compared with CaSi powder in the ladle; because the light CaSi escapes out from the chimney, and it varies as the furnace condition, etc.
(4) It is concluded that the use of suf ficient amount of preheated CaSi powder in the ladle improves the desulphurising action and the mechanical properties and the quality of casting to a certain extent.