本文選題：鏡鐵山礦 + 白尖礦�。� 參考：《華北理工大學》2015年碩士論文

【摘要】：酒鋼目前的塊礦豎爐磁化焙燒工藝存在鐵回收率低和粉礦難以處理的問題,迫切需要開發(fā)新的鐵礦石處理工藝,本文在研究原燃料物理化學性能的基礎上,通過實驗室模擬,系統地研究酒鋼鏡鐵山礦和白尖礦原礦粉的生球造球、干燥、磁化焙燒及磁選工藝過程,從中發(fā)現:鏡鐵山礦原礦粉造球過程中將膨潤土配比控制為2%左右、煤粉配比控制為2%左右、原礦粉粒度中-200目比例控制為80%、生球水分控制在9.5%左右是比較適宜的。在生球干燥過程中將球團礦層厚度控制為200mm左右,干燥氣流速度控制為1m/s左右、干燥氣流溫度控制為300℃左右、干燥時間控制為10min可以滿足原礦粉球團礦磁化焙燒的需要。用高溫反應管在800℃隔絕空氣條件下對鏡鐵山礦原礦粉球團進行磁化焙燒40min,磁化焙燒后鏡鐵山礦原礦粉球團礦采用兩段磨礦和兩段磁選流程,可以獲得TFe為61.86%左右的鐵精礦,鐵精礦產率和TFe回收率分別達到52.10%和85.07%。白尖礦原礦粉造球過程中將膨潤土配比控制為1~2%、煤粉配比控制為2%左右、原礦粉粒度中-200目比例控制為60%~80%,生球水分控制為9.0%左右,可以生產出合格的原礦粉生球。在生球干燥過程中將球團礦層厚度控制為200mm左右,干燥氣流速度控制為1m/s左右、干燥氣流溫度控制為300℃左右、干燥時間控制為10min是比較適宜的。用高溫反應管在800℃隔絕空氣條件下對白尖礦原礦粉球團磁化焙燒40min,磁化焙燒后白尖礦原礦粉球團礦采用兩段磨礦和兩段磁選流程后可以獲得TFe為59.03%左右的鐵精礦,鐵精礦產率和TFe回收率分別達到42.33%和74.54%。
[Abstract]:The magnetization roasting process of the current block shaft furnace of Jiuquan Iron and steel company has the problems of low iron recovery and hard to deal with the powder ore. It is urgent to develop a new iron ore treatment process. On the basis of studying the physical and chemical properties of the raw fuel, this paper systematically studies the pellet making and drying of the raw mineral powder of Jiuquan Iron hill and white pointed ore through laboratory simulation. The process of magnetization roasting and magnetic separation shows that the ratio of bentonite is controlled to about 2%, the ratio of pulverized coal is controlled to about 2%, the ratio of -200 mesh in the particle size of raw mineral powder is 80%, and the water control of raw ball is about 9.5%. The thickness of pellet layer is controlled to 20 in the drying process of raw ball. Around 0mm, the drying air velocity is about 1m/s, the drying air temperature is about 300 C. The drying time is 10min, which can satisfy the need of magnetization roasting of the raw ore powder pellet. The magnetized roasting of the original ore powder pellets of the mirror Tieshan mine was roasted for 40min with the high temperature reaction tube at 800 degrees centigrade. The ore powder pellet uses two stages of grinding and two sections of magnetic separation process. The iron concentrate with TFe of 61.86% can be obtained. The yield of iron concentrate and the recovery rate of TFe can reach 52.10% and 85.07%. white pointed ore powder in the process. The ratio of bentonite is controlled to 1~2%, the ratio of pulverized coal is 2% left right, and the proportion of -200 mesh in the particle size of the raw ore powder is 60%~80%, The water control of the raw ball is about 9%, which can produce a qualified raw ball of raw mineral powder. In the process of drying the ball, the thickness of the pellet is controlled to about 200mm, the drying air velocity is about 1m/s, the drying air temperature is controlled to about 300 C, and the drying time is 10min is more suitable. The high temperature reaction tube is cut off at 800. The original ore powder pellets of white pointed ore were magnetized and roasted for 40min under gas conditions. After magnetized roasting, the original ore powder pellets in white pointed ore were used in two stages of grinding and two stages of magnetic separation. The iron concentrate of about 59.03% of TFe could be obtained. The yield of iron concentrate and the recovery rate of TFe reached 42.33% and 74.54%., respectively.
【學位授予單位】：華北理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD951;TD924

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相關期刊論文 前2條

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本文編號：1903902