本文選題：風化白鎢礦 + 細泥��； 參考：《中國礦業(yè)大學》2015年碩士論文

【摘要】：我國的白鎢礦大多都是細粒嵌布,極易泥化,表面容易被細粒脈石礦物污染而失去原有的可浮性。同時,白鎢礦風化后產(chǎn)生大量白鎢細泥,進一步增大了選礦難度,致使細粒白鎢礦回收非常困難。加強對微細粒白鎢礦的綜合回收是有效、合理利用白鎢礦資源的重要途徑。本文以某風化白鎢細泥為研究對象,對原礦進行了粒度分析、化學元素分析、化學物相分析以及礦物組成分析。根據(jù)原礦性質(zhì),進行了單礦物藥劑試驗,研究了不同捕收劑以及調(diào)整劑對礦物可浮性的影響。然后根據(jù)單礦物試驗的結(jié)果對實際礦物進行了浮選研究,確定了最佳的入料細度、藥劑制度以及浮選工藝流程。最后進行了強化浮選研究,分別通過強化攪拌、載體浮選和多流態(tài)過程強化柱浮選等方式提高細泥的回收率。根據(jù)單礦物藥劑試驗的結(jié)果,用實驗室浮選機對原礦進行了常規(guī)浮選研究,確定了粗選的入料細度為-0.074mm占80%,浮選礦漿濃度為35%,粗選過程中的藥劑制度為Na2CO32000g/t、水玻璃2000g/t、硝酸鉛1000g/t、捕收劑ZL300g/t。獲得鎢粗精礦品位為3.85%,回收率為55.08%。通過工藝流程試驗,最終選擇了“一粗二精三掃”流程,并且在閉路條件下,獲得了品位為12.62%,WO3回收率為56.31%的鎢精礦。采用強化攪拌調(diào)漿,并用實驗室旋流-靜態(tài)微泡浮選柱對白鎢細泥進行一次粗選試驗,按照浮選機常規(guī)浮選的藥劑制度,獲得的粗精礦品位為5.71%,WO3回收率達到了63.16%。由于精礦產(chǎn)率較低,所以用浮選機精選,最終確定了“浮選機精選+浮選柱一粗一掃”實驗室柱機聯(lián)合流程,分別進行了開路和閉路試驗,獲得鎢精礦的品位為12.38%,WO3回收率為63.95%。相比浮選機“一粗二精三掃”流程,WO3品位基本相當,回收率提高了7.64個百分點。通過篩析對比,浮選柱的浮選尾礦的細粒級(-38μm)中WO3占有率比浮選機低了7.14個百分點,說明浮選柱對于細粒級白鎢礦浮選效果更好,浮選柱在浮選細粒級白鎢礦上有較大的優(yōu)勢。采用浮選柱系統(tǒng)回收細粒白鎢礦資源具有重要意義,實現(xiàn)了風化白鎢細泥資源高效回收利用。
[Abstract]:Most of the scheelite ores in China are fine-grained and easily muddy, and the surface is liable to be polluted by fine gangue minerals and lose its original floatability. At the same time, a large amount of fine slime of scheelite is produced after weathering, which further increases the difficulty of ore dressing and makes it very difficult to recover fine wolframite. It is an effective and important way to make rational use of scheelite resources by strengthening the comprehensive recovery of fine Scheelite. In this paper, the particle size analysis, chemical element analysis, chemical phase analysis and mineral composition analysis of a weathered white tungsten slime are carried out. The effects of different collector and adjuster on the floatability of minerals were studied. Then according to the results of the single mineral test, the flotation of real minerals was studied, and the optimum fineness, reagent system and flotation process were determined. Finally, enhanced flotation was carried out to improve the recovery rate of fine mud by means of enhanced stirring, carrier flotation and multi-flow process enhanced column flotation respectively. Based on the results of the single mineral reagent test, the conventional flotation of raw ore was studied with a laboratory flotation machine. The fineness of raw material is -0.074 mm and the concentration of flotation pulp is 35. The reagent system in rough separation is Na _ 2CO _ 3 2000g / t, water glass 2000g / t, lead nitrate 1000g / t, collector ZL 300g / t. The grade of tungsten concentrate is 3.85 and the recovery is 55.08. Through the technological process test, the process of "one coarse, two fine, three sweeping" was selected, and under the closed circuit condition, the tungsten concentrate with a grade of 12.62% was obtained and the recovery rate of WO _ 3 was 56.31%. A coarse separation test of white tungsten fine slime was carried out by means of a laboratory swirl static microbubble flotation column. According to the conventional flotation reagent system of flotation machine, the coarse concentrate grade of 5.71% WO _ 3 was obtained and the recovery rate reached 63.16%. Because of the low yield of concentrate, the combined flow of laboratory column and laboratory column was determined by flotation machine, and the grade of tungsten concentrate was 12.38 wo 3 recovery rate of 63.95. Compared with flotation machine, the grade of WO _ 3 is almost the same, and the recovery rate is increased by 7.64%. By screening and comparing, the WO _ 3 occupation rate of flotation tailings (-38 渭 m) of flotation column is 7.14% lower than that of flotation machine, which indicates that flotation column has better flotation effect on fine grade scheelite, and flotation column has great advantage in flotation fine grade scheelite. It is of great significance to use flotation column system to recover fine wolframite resources and to realize the efficient recovery and utilization of weathered wolframite fine slime resources.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD954

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