本文選題：高鋁鐵礦 + 高錳鐵礦　； 參考：《材料與冶金學(xué)報(bào)》2017年01期

【摘要】：高鋁鐵礦和高錳鐵礦是兩種儲(chǔ)量豐富但又極難分選的鐵礦資源,實(shí)現(xiàn)鐵、錳、鋁的高效綜合利用具有重要意義.本文研究了這兩種鐵礦石工藝礦物學(xué),考查了單礦種及兩者的混合礦種的直接還原行為及還原過(guò)程中的礦物組成演變,揭示了相應(yīng)的還原機(jī)理.結(jié)果表明:高鋁鐵礦難還原,其機(jī)理為經(jīng)還原后僅部分鐵氧化物轉(zhuǎn)化為金屬鐵,其余的鐵與鋁、硅礦物形成難還原的鐵橄欖石和鐵尖晶石;高錳鐵礦易還原,其中的鐵氧化物大部分被還原成金屬鐵,錳氧化物與鋁、硅礦物結(jié)合形成錳尖晶石和錳橄欖石,促進(jìn)了鐵氧化物的還原.而且在相同還原條件下,高錳鐵礦球團(tuán)金屬化率比高鋁鐵礦高30個(gè)百分點(diǎn),前者還原性明顯優(yōu)于后者.兩種礦進(jìn)行共還原,當(dāng)高錳鐵礦配比達(dá)到60%時(shí),球團(tuán)金屬化率就可大于90%.錳氧化物的存在對(duì)高鋁鐵礦石中鐵氧化物的還原具有顯著的促進(jìn)作用.
[Abstract]:High alumina iron ore and high manganese iron ore are two kinds of iron ore resources which are rich in reserves but difficult to separate. It is of great significance to realize the efficient comprehensive utilization of iron, manganese and aluminum. In this paper, the mineralogy of these two iron ore processes is studied. The direct reduction behavior and the mineral composition evolution during the reduction process of single ore and their mixture are investigated, and the corresponding reduction mechanism is revealed. The results show that the mechanism of refractory reduction of high alumina iron ore is that only part of iron oxide is transformed into metal iron after reduction, and other iron and aluminum minerals form iron-olivine and ferric spinel which are difficult to be reduced, and high manganese iron ore is easy to be reduced. Most of the iron oxides were reduced to metal iron, manganese oxides combined with aluminum and silicon minerals to form manganese spinel and manganese olivine, which promoted the reduction of iron oxides. Under the same reduction conditions, the metallization rate of high manganese ore pellets is 30% higher than that of high alumina iron ore, and the former is obviously superior to the latter. When the ratio of high manganese iron ore reaches 60, the pellet metallization rate can be greater than 90. The existence of manganese oxide can promote the reduction of iron oxide in high alumina iron ore.
【作者單位】： 中南大學(xué)資源加工與生物工程學(xué)院;武漢科技大學(xué)資源與環(huán)境工程學(xué)院;
【基金】：科技部支撐計(jì)劃項(xiàng)目(2013BAB03B04);科技部火炬計(jì)劃項(xiàng)目(2011GH561685) 湖南省2011協(xié)同創(chuàng)新計(jì)劃資助項(xiàng)目
【分類(lèi)號(hào)】：TD951

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本文編號(hào)：1949201