Preparation method of magnetic sulfide minerals

The invention discloses a preparation method of magnetic sulfide minerals. The preparation method comprises the steps of selecting ferrous sulfide minerals, and finely grinding the ferrous sulfide minerals to be less than 100 [mu] m; adding the ferrous sulfide minerals into an alkaline solution of which the pH value is 9-13, and stirring to carry out magnetic reaction at 20-90 DEG C so as to obtain the magnetic sulfide minerals. According to the preparation method of the magnetic sulfide minerals provided by the invention, the surface magnetism of the minerals can be changed on the basis that the morphology of mineral particles is not damaged; furthermore, the sulfide minerals after the modification of a magnetic enhancement technique has good magnetic property and can essentially keep the primary basic attributes of the sulfide minerals, therefore the sulfide minerals can be used as physical agents during material separation.