發(fā)布時間：2018-09-05 18:00

【摘要】：分離白鎢礦與鈣質(zhì)礦物是浮選白鎢礦的一大難點,已逐漸成為選礦界的研究焦點,這主要是由于鈣質(zhì)礦物與白鎢礦表面性質(zhì)及可浮性相近。本文采用單礦物浮選試驗對美狄蘭、油酸鈉、辛基羥肟酸、水楊羥肟酸、731、苯甲羥肟酸等六種捕收劑的浮選行為進行了研究,以及采用紅外光譜、動電位等先進測試手段,對其作用機理進行了研究。白鎢礦單礦物浮選研究表明,采用美狄蘭、油酸鈉、辛基羥肟酸和731時,白鎢礦的浮選行為較好,尤其美狄蘭對白鎢礦的浮選效果更佳,當(dāng)美狄蘭的加入量為50mg/L時,白鎢礦回收率就已經(jīng)超過了95%,而且浮選p H值范圍較廣。而水楊和苯甲羥肟酸對白鎢礦的捕收作用很弱,當(dāng)二者用量分別為200mg/L時,白鎢礦幾乎不上浮,回收率僅僅約20%,且當(dāng)二者加入量分別超過600mg/L時,白鎢礦回收率也僅僅80%左右,可能需要配合使用一定量的活化劑才可以達到較佳的浮選效果。六種捕收劑的捕收能力從強到弱排序為美狄蘭、辛基羥肟酸、油酸鈉、苯甲羥肟酸、731、水楊羥肟酸。四種單礦物浮選試驗結(jié)果表明,美狄蘭在整個研究的p H范圍內(nèi)對石英的浮選性能都較差,可將白鎢礦與石英進行有效分離;在p H為6~12之間,螢石、方解石回收率維持在90%以上,但添加水玻璃后,螢石得到了有效抑制,尤其在p H為8左右時,螢石回收率比白鎢礦回收率低70%左右,可使白鎢礦與螢石有效分離。水玻璃對方解石的抑制效果欠佳,但在水玻璃用量達到2500mg/L時,方解石的回收率急劇下降,與白鎢礦的回收率相差較大,有望實現(xiàn)二者的分離。采用辛基羥肟酸作捕收劑時,雖然加入一定量的水玻璃能夠抑制方解石和螢石,但與美狄蘭相比,白鎢礦的回收率較低,而且當(dāng)水玻璃用量超過2000mg/L時,白鎢礦的回收率下降較快。人工混合礦分離試驗也表明了美狄蘭作白鎢礦捕收劑時,浮選分離效果較好。紅外光譜分析結(jié)果表明,六種捕收劑在白鎢礦表面發(fā)生了化學(xué)吸附。吸附量測定結(jié)果表明,捕收劑在白鎢礦表面的吸附量與礦漿p H值有關(guān),其變化趨勢與白鎢礦單礦物浮選試驗規(guī)律基本一致,并且在一定捕收劑用量范圍內(nèi),捕收劑用量越大,礦物吸附量也越多。接觸角測定結(jié)果表明,使用美狄蘭、辛基羥肟酸作白鎢礦捕收劑,白鎢礦表面接觸角較大,而油酸鈉、731、苯甲羥肟酸、水楊羥肟酸作用于白鎢礦后,白鎢礦表面接觸角相比美狄蘭和辛基羥肟酸較小。ξ-電位測定結(jié)果表明,與無捕收劑作用時相比,美狄蘭、辛基羥肟酸作用后的白鎢礦表面的ξ-電位發(fā)生負移,說明捕收劑與白鎢礦表面發(fā)生了一定的化學(xué)吸附。
[Abstract]:Separation of scheelite and calcium minerals is a major difficulty in flotation of scheelite, and has gradually become the focus of research in the field of mineral processing, mainly because the surface properties and floatability of calcium minerals and scheelite are similar. In this paper, the flotation behavior of medeland, sodium oleate, octyl hydroxamic acid, salicyloxime acid 731 and benzohydroxamic acid were studied by single mineral flotation test. The mechanism of its action was studied. The flotation behavior of scheelite was studied by using Metallol, sodium oleate, octyl hydroxamic acid and 731. The flotation behavior of scheelite was better, especially when the addition of Metdrin was 50mg/L, the flotation effect of Scheelite was better. The recovery rate of scheelite is over 95 and the pH value of flotation is wide. However, salicylidene and benzyl hydroxamic acid have very weak effect on the collection of scheelite. When the dosage of them is 200mg/L, the wolframite almost does not rise, the recovery rate is only about 20%, and the recovery rate of scheelite is only about 80% when the addition amount of both is more than 600mg/L, respectively. It may be necessary to use a certain amount of activator in order to achieve a better flotation effect. The order of collecting ability of six kinds of collectors from strong to weak are Medilan, octyl hydroxamic acid, sodium oleate, benzohydroxamic acid 731 and salicylhydroxamic acid. The results of flotation tests of four single minerals show that the flotation performance of quartz is poor in the range of pH, and the scheelite can be effectively separated from quartz, and fluorite can be separated from quartz in the range of pH = 6 ~ (12). The recovery rate of calcite is above 90%, but fluorite can be effectively inhibited by adding sodium silicate. Especially when pH is about 8, the recovery of fluorite is about 70% lower than that of scheelite, which can effectively separate scheelite from fluorite. The inhibition effect of water glass on calcite is not good, but when the amount of sodium silicate reaches 2500mg/L, the recovery of calcite decreases sharply, which is different from that of scheelite, which is expected to achieve the separation of the two. When octyl hydroxamic acid is used as collector, calcite and fluorite can be inhibited by adding a certain amount of water glass, but the recovery of scheelite is lower than that of medeland, and when the amount of water glass exceeds 2000mg/L, The recovery rate of scheelite decreases rapidly. The separation experiment of artificial mixed ore also shows that the flotation separation effect is better when Medeland is used as the collector of scheelite. The results of infrared spectrum analysis show that the six collectors have chemisorption on the surface of scheelite. The results show that the adsorption amount of collector on the surface of scheelite is related to pH value of slurry, and its changing trend is basically consistent with the flotation test of single mineral of scheelite, and the larger the amount of collector is, the larger the amount of collector is in a certain range of collector dosage. The amount of mineral adsorption is also more. The results of contact angle measurement showed that the surface contact angle of scheelite was higher when Metallol and octyl hydroxamic acid were used as collector, while sodium oleate, benzohydroxamic acid and salicyloxime acid acted on scheelite. The surface contact angle of scheelite is smaller than that of medeland and octyl hydroxamic acid. The result of 尉 potential measurement shows that there is a negative shift of 尉 potential on the surface of scheelite after the action of medelan and octyl hydroxamic acid compared with that without collector. It shows that the collector and the surface of scheelite have a certain amount of chemisorption.
【學(xué)位授予單位】：江西理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD923.13;TD954

【參考文獻】

相關(guān)期刊論文 前10條

1 《關(guān)于我國鎢業(yè)發(fā)展中若干重大問題的研究》專題小組,季永康;中國鎢資源接替問題的研究[J];世界有色金屬;1999年08期

2 高玉德;王國生;韓兆元;;某矽卡巖型白鎢礦選礦試驗研究[J];材料研究與應(yīng)用;2012年03期

3 李翠芬;宋翔宇;薛方科;李瑩;張雨田;李志偉;;某低品位黑白鎢礦選礦試驗研究[J];金屬礦山;2012年05期

4 程新朝;鎢礦物和含鈣礦物分離新方法及藥劑作用機理研究Ⅱ.藥劑在礦物表面作用機理研究[J];國外金屬礦選礦;2000年07期

5 孫偉,胡岳華,覃文慶,徐竟;鎢礦浮選藥劑研究進展[J];礦產(chǎn)保護與利用;2000年03期

6 鄧麗紅;周曉彤;;新型捕收劑R_(31)浮選低品位白鎢礦的研究[J];礦產(chǎn)保護與利用;2007年04期

7 韓兆元;管則皋;盧毅屏;王國生;;組合捕收劑回收某鎢礦的試驗研究[J];礦冶工程;2009年01期

8 邵偉華;張艷嬌;趙平;劉廣學(xué);常學(xué)勇;;某低品位白鎢礦選礦試驗[J];現(xiàn)代礦業(yè);2012年12期

9 劉清高;韓兆元;管則皋;;白鎢礦浮選研究進展[J];中國鎢業(yè);2009年04期

10 付廣欽;何曉娟;周曉彤;;黑鎢細泥浮選研究現(xiàn)狀[J];中國鎢業(yè);2010年01期

，

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