Microwave roasting of pyrite tailings and pyrite ash for sponge iron production

Abstract

Iron ores containing ferrous minerals and sulphide minerals are specifically as several times active in microwave. Pyrolysis of the coal usually requires iron minerals for activation step to both absorption microwave from the matrix of the sulphides and conduct the heat to coal for pyrolysis. In this investigation, the copper pyrite and coal pyrite was microwave roasted to oxidize both the sulphides and even the pyrolysis of coal for reduction iron oxide. The effects were investigated by gravimetric and infrared analysis and the microwave absorption characteristics were quantified by determining the permittivities. The microwave heating behaviour studies showed that the sample temperature increased with increasing incident microwave power, processing time and sample mass. Due to the activity of the iron ore to the microwaves, a low incident power of 600W was found to be sufficient for roasting, as higher powers resulted in sintering and melting of the concentrate. The copper pyrite weight loss values after roasting were over 25% and these were similar to those obtained by conventional roasting. The main advantages of microwave roasting were that both the total pyrolysis rates and the heating rates were higher and the specific energy consumptions were lower than in coal pyrite. In this study; low-grade iron ore and sponge iron pyrite by high production of waste parched areas were carried out. X-ray diffraction analysis of the products mineralogy and grain size in polarizing microscopic description is determined by the nature of the leaching effect on the physical and chemical parameters. Chemical properties making preliminary tests to determine the pellet roasting conditions, reactivity were investigated. This assay has been determined to be advantageous in the metal results in the production of sponge iron with the pyrite ash waste. The feasibility use of low-grade iron ore with microwave roasted pyrite, and pyrite ash in production sponge iron were tested and the physical, chemical properties of the products regarding the results of microwave roasting tests were determined by examining the difference between the textural properties of the different pyrite and ash. The pyrites of Ergani copper concentrator and Siirt were in this study identified as potential iron source in terms of the basic qualifications of sponge iron.