Research On Preparing The Material Of Soft Magnetism Ferrites Using Pyrite Cinder

The pyrite cinder is the industry waste residue which is produced with in the pyrite production sulfuric acid process. Every time produces the 1t sulfuric acid to be able generally to produce 0.8t to cinder, our country discharges 12,000,000 t pyrite cinder approximately every year. However only has 10% cinder to use in industries and so on cement making the assistance raw material approximately. Not only the use factor is low, but also the product added value is also low, limiting the large-scale reusing of pyrite cinders. Our country sulfuric acid output occupies world third, yearly produces the near thousands of ton, massive pyrite cinder emissions and stack, not only the waste resources, take the land, but also has created a series of environment problem. The pyrite cinders question already becomes the important content on firmly waste question in our country. If we could comprehensive use the pyrite cinders beneficial ingredient, not only might use national resources again, enhance the enterprise benefit, but also could solve the environment problem, therefore had the vital practical significance.The ferrites are one new non-metallic magnetic material which in the recent several dozens years develop rapidly. Looked from his characteristic, it belongs to the semiconductor category, Therefore some ferrites also are called the magnetic semiconductor. And the development along with the science and technology and the social economy, not only the ferrites apply in the electronics industry department day by day widely, for example in communication broadcast,automatic control aspects and so on computation technology and instrument measuring appliance becomes the essential constituent, moreover in astronautics,satellite communication aspects and so on information demonstration and pollution processing also opened the new broad application prospect. Produces each kind of ferrites the primary data is Fe₂O₃, occupies raw material generally 50-80%. The production soft magnetism ferrites main material isα-Fe₂O₃.On this topic, the pyrite cinder take the Wuhan Steel Corporation Jinshan Shop Iron ore Vitriol plant pyrite as a raw material. Considered from the industry cost, we uses the acid mixture directly pickling iron ion from pyrite cinder, the leaching rate may reach above 93%, achieves feasible use factors again basically. Again carries on the aqueous method to eliminate the mixed system to take the ferrous solution, and take this purification ferrous solution as raw material, results inα-Fe₂O₃ through the desiccation oxidation system. Discussed in the preparation process to affect this experimental many factors, completed the acid pickling mixed, Purification and Synthesis. except, synthesized three major part experiments, and to in each part of experimental reaction temperature, the reaction time, the agitation speed, the material composition, factors and so on solution acidity through the unceasing optimized condition, finally burnt the dregs system using the pyrite to result in soft magnetism ferrites raw materialα-Fe₂O₃, its basic parameter conformed to the correlation application standard.Compares with other related crafts, this craft has following merit: The craft easy to operate, the main correlation parameter is advantageous for the control, the energy consumption is smallest, the entire flow needs to be short, the product pHase solely even, stable. Therefore the investment cost are few, for the pyrite cinder swidespread use to provide the good foundation, has achieved the waste circulation use goals.