A kind of iron oxide-ferrite composite material prepared by metallurgical dust, preparation method and application thereof
A composite material and iron oxide technology, which is applied in the field of iron oxide-ferrite composite material preparation, can solve problems such as narrow application fields and cost constraints, and achieve the effects of simple operation, reduced pollution, and wide applicability
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[0028] The preparation method of the iron oxide-ferrite composite material in the embodiment of the present invention includes the following steps: using a large amount of solid waste-metallurgical dust generated in the production process of the iron and steel industry as the initial raw material, and sintering the above-mentioned initial raw material for the first time Obtain iron oxide, then mix the above-mentioned iron oxide and metal compound to obtain a mixed material, and then sinter the above-mentioned mixed material for a second time to obtain an iron oxide-ferrite composite material.
[0029] In some embodiments, the initial raw material is pretreated before the first sintering, wherein the pretreatment includes centrifugal drying treatment and ball milling treatment, and the centrifugal drying treatment specifically includes the following steps: weighing an appropriate amount of initial raw material, adding deionized water to fully After stirring evenly, stand and pou...
Embodiment 1
[0054] Take an appropriate amount of solid waste and put it into deionized water, stir and let it stand for 1 hour, then pour out the supernatant, then add deionized water and let it stand still, wash it repeatedly for 5 times, then centrifugally filter it, put the filter cake in an oven and dry it at 150°C for 4 hours Put the above-mentioned dried filter cake into a ball mill, select stainless steel balls with a diameter of 6mm as the balls for ball milling, the rotating speed is 300r / min, the mass ratio of the ball to material is 20:1, and the ball milling time is 4h; Carry out screening and testing, proceed to the next step if the average particle size is less than 600 mesh screen, and continue ball milling if the average particle size is larger than 600 mesh screen; put the above solid waste into a crucible, and then put it into a muffle furnace for roasting in an air atmosphere , the calcination temperature is 500°C, and the calcination time is 2h; the cooled sample is obt...
Embodiment 2
[0061] Take an appropriate amount of solid waste and put it into deionized water, stir and let it stand for 1 hour, then pour out the supernatant, then add deionized water and let it stand still, wash it repeatedly for 5 times, then centrifugally filter it, put the filter cake in an oven and dry it at 180°C for 2 hours Put the above-mentioned dried filter cake into a ball mill, select stainless steel balls with a diameter of 6mm as the balls for ball milling, the rotating speed is 300r / min, the mass ratio of the ball to material is 25:1, and the ball milling time is 4h; The waste is put into a crucible, then put into a muffle furnace and roasted in an air atmosphere, the roasting temperature is 600°C, and the roasting time is 2h; the cooled sample is obtained by cooling;
[0062] Take basic copper carbonate and the above-mentioned sintered and cooled α-Fe 2 o 3 According to the molar ratio of iron and cobalt of 6:1, add copper salt, put it into a mortar, mix and grind it roug...
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