本文關(guān)鍵詞： 鈧 X射線分選 磁選 反浮選 浮選藥劑　出處：《內(nèi)蒙古科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：白云鄂博礦是我國(guó)著名的一座以鐵、稀土、螢石為主，并含有鈧、鈮等特大型復(fù)雜共伴生礦床。其中的鈧是一種典型的稀散重稀土元素，且在白云鄂博礦中未發(fā)現(xiàn)其的獨(dú)立礦物。鈧具有很多優(yōu)良的物理、化學(xué)性質(zhì)，使其被廣泛應(yīng)用于航天、軍事、機(jī)械、電子、材料等重要領(lǐng)域。目前對(duì)白云鄂博礦中鈧資源的利用率為0%，所以，利用傳統(tǒng)選礦方法從白云鄂博礦的各種礦石中回收含鈧礦物具有重要的經(jīng)濟(jì)環(huán)保意義，符合當(dāng)下我國(guó)國(guó)情。 目前包鋼選廠采用的是“弱磁-強(qiáng)磁-浮選”工藝流程，兩條路線對(duì)白云鄂博礦進(jìn)行分選回收，一條路線是：弱磁選、強(qiáng)磁選再反浮選綜合回收鐵與螢石；另一條路線是：強(qiáng)磁選的中礦浮選回收稀土。 近幾年，國(guó)內(nèi)許多研究單位、高校對(duì)白云鄂博礦鐵、稀土、鈮、螢石的回收利用有很多相關(guān)的報(bào)告，如：利用組合抑制劑優(yōu)化包鋼選礦廠稀土浮選藥劑，采取選冶聯(lián)合工藝綜合回收白云鄂博資源，白云鄂博尾礦再回收鐵、稀土、螢石等研究。關(guān)于利于傳統(tǒng)選礦的方法回收白云鄂博礦中鈧資源長(zhǎng)沙礦冶研究院和我校李梅老師課題組等在這方面進(jìn)行了有關(guān)研究，但關(guān)于其的研究的報(bào)告還是比較少。實(shí)現(xiàn)白云鄂博礦中多資源的綜合回收利用是發(fā)展方向。 本研究利用X射線分選技術(shù)對(duì)白云鄂博原礦進(jìn)行含鈧礦物分選與依次分選釷、鈮、稀土礦物，然后選擇X射線依次分選釷、鈮、稀土礦物后得到的尾礦代替礦量不足的鈧精礦進(jìn)行分選含鈧礦物試驗(yàn)研究，回收含鈧礦物試驗(yàn)采用“弱磁-反浮選”工藝流程。本研究得到了如下成果： ⑴根據(jù)元素特征X射線的唯一性，利用X射線分選機(jī)，在礦石粒級(jí)為3-15cm的條件下，進(jìn)行一次含鈧礦物分選得到了250ppm左右的鈧精礦；采用先分選釷礦再分選鈮礦之后再分選稀土礦的工藝，在閾值為0.13，得到了品位0.04%，回收率30.13%的釷精礦；在閾值為0.2，得到了品位0.21%，回收率14.46%的鈮精礦；在閾值為0.62，得到了品位11.27%，回收率25.18%的稀土精礦；得到了鈧品位105.89ppm，回收率51.72%的X射線分選尾礦。 ⑵在磨礦細(xì)度-200目90%的條件下，采用磁場(chǎng)強(qiáng)度為95.5KA/M對(duì)X射線分選尾礦磁選，得到了品位為62.02%，回收率為66.04%的鐵精礦及鈧品位110.3ppm，回收率72%的磁選尾礦。 ⑶在礦漿濃度40%，礦漿溫度40℃，-200目占94.5%，pH=9.5，Na2CO3作pH調(diào)整劑，，水玻璃用量3kg/t，油酸用量1.8kg/t的條件下，對(duì)磁選尾礦進(jìn)行粗選試驗(yàn)，得到了品位242.75ppm，回收率50.82%的鈧粗精礦；對(duì)所得的鈧粗精礦進(jìn)行3次精選最終得到了品位418.72ppm，回收率31.20%的鈧精礦。
[Abstract]:The Bayan Obo ore deposit is a famous ore deposit of iron, rare earth, fluorite, and contains SC, NB, etc., among which scandium is a typical dilute and heavy rare earth element. Scandium has many excellent physical and chemical properties, which make it widely used in aerospace, military, mechanical, electronic, etc. At present, the utilization ratio of scandium resources in Baiyunebo Mine is 0. Therefore, it is of great economic and environmental significance to recover scandium bearing minerals from all kinds of ores in Baiyunebo Mine by traditional ore dressing method, which is in line with the current situation of our country. At present, Baotou Iron and Steel Co., Ltd is using the "weak Magnetic-strong Magnetic-flotation" technological process. Two routes are used for separation and recovery of Baiyunebo ore. One route is: weak magnetic separation, strong magnetic separation and reverse flotation comprehensive recovery of iron and fluorite; Another route is: strong magnetic separation of ore flotation recovery of rare earths. In recent years, many domestic research units and universities have reported on the recovery and utilization of iron, rare earth, niobium and fluorite from Baiyunebo Mine, such as optimizing the flotation reagents of rare earth in Baotou Iron and Steel Concentrator by using combined depressants. Comprehensive recovery of Bayan Obo resources by combined processing of processing and metallurgy, and recycling of iron and rare earths from Bayan Obo tailings, On the recovery of Scandium from Baiyunebo Mine by traditional methods of dressing, the Changsha Institute of Minerals and Metallurgy and the teacher Li Mei of our school have carried out relevant studies in this respect. But there are few reports on the research, and it is the development direction to realize the comprehensive recovery and utilization of many resources in Bayan Obo Mine. In this paper, the mineral separation of scandium bearing minerals and the separation of thorium, niobium and rare earth minerals from Baiyunebo raw ore were carried out by using X-ray separation technology, and thorium, niobium and rare earth minerals were sequentially separated by X ray. The tailings obtained from rare earth minerals are used to separate the scandium bearing minerals instead of the scandium concentrate, and the technological process of "weak magnetic field reverse flotation" is used to recover the scandium bearing minerals. The results are as follows:. 1 according to the uniqueness of the elemental characteristic X-ray, the scandium concentrate of about 250ppm was obtained by using X-ray separator under the condition of ore particle size of 3-15cm. The thorium concentrate with a grade of 0.04 and a recovery of 30.13% is obtained by the process of separating thorium ore and then separating niobium ore before separating rare earth ore at the threshold of 0.13, and the niobium concentrate with grade 0.21 and recovery rate of 14.46% is obtained when the threshold value is 0.2. At the threshold value of 0.62, the rare earth concentrate with a grade of 11.27 and a recovery of 25.18% was obtained, and the tailings with a grade of 105.89 ppm of scandium and a recovery of 51.72% were obtained. 2 under the condition of grinding fineness-200 mesh 90%, the magnetic field intensity is 95.5KA / M for the magnetic separation of tailings by X-ray separation, the iron concentrate with grade 62.02and the recovery rate 66.04% and the tailings with SC grade 110.3ppm and 72% recovery are obtained. (3) under the conditions of 40% pulp concentration, 40 鈩

本文編號(hào)：1547631