發(fā)布時間：2018-05-29 02:47

  本文選題：高鋁鐵礦 + 高錳鐵礦�。� 參考：《材料與冶金學報》2017年01期

【摘要】：高鋁鐵礦和高錳鐵礦是兩種儲量豐富但又極難分選的鐵礦資源,實現鐵、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,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程中的礦物組成演變,揭示了相應的還原機理.結果表明:高鋁鐵礦難還原,其機理為經還原后僅部分鐵氧化物轉化為金屬鐵,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、硅礦物結合形成錳尖晶石和錳橄欖石,促進了鐵氧化物的還原.而且在相同還原條件下,高錳鐵礦球團金屬化率比高鋁鐵礦高30個百分點,前者還原性明顯優(yōu)于后者.兩種礦進行共還原,當高錳鐵礦配比達到60%時,球團金屬化率就可大于90%.錳氧化物的存在對高鋁鐵礦石中鐵氧化物的還原具有顯著的促進作用.
[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】： 中南大學資源加工與生物工程學院;武漢科技大學資源與環(huán)境工程學院;
【基金】：科技部支撐計劃項目(2013BAB03B04);科技部火炬計劃項目(2011GH561685) 湖南省2011協(xié)同創(chuàng)新計劃資助項目
【分類號】：TD951

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本文編號：1949201