MAGNETIC MATERIAL

PURPOSE:To reduce the production cost of a magnetic material by removing oil from the ground scraps of a iron material and allowing them to react with steam under heating and utilizing the resultant magnetite as a main component of the magnetic material. CONSTITUTION:Ground scraps which are produced in the case of grinding of iron material are recovered though they have been subjected to disposal heretofore. The ground scraps 10 are charged into an electric open 12 and an oven cover 12a is closed and the valve 26 of an N2 introduction pipe 25 is opened. While introducing gaseous nitrogen into the electric oven 12, the temp. of the electric oven 12 is raised and water and oil contained in the ground scraps 10 are evaporated and recovered in a recovery tank 19. After heating of the ground scraps 10 free from water and oil 550-1,000 deg.C, steam is introduced into the electric oven 12 through steam introduction pipe 15 and is reacted with the scraps as shown in the formula. Resultant magnetite is recovered and utilized as a main component of a magnetic material.