本文關(guān)鍵詞： 鎳黃鐵礦 黃銅礦 電位調(diào)控 表面氧化產(chǎn)物　出處：《江西理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：銅鎳硫化礦礦石性質(zhì)普遍較為復(fù)雜,硫化礦物間的可浮性相近,目的礦物自身表面氧化現(xiàn)象明顯,再加上難免離子的刺激,脈石礦物的泥化影響,導(dǎo)致銅鎳礦物的浮選回收與分離困難,為此本文系統(tǒng)的研究了硫化銅鎳礦的浮選行為及其表面產(chǎn)物的作用機(jī)制,考查了鎳黃鐵礦和黃銅礦在自誘導(dǎo)和捕收劑誘導(dǎo)條件下的浮選行為及其表面氧化產(chǎn)物,為綜合回收硫化銅鎳礦提供了基礎(chǔ),對(duì)提高銅鎳資源的利用率意義重大。主要的研究?jī)?nèi)容如下:(1)在自誘導(dǎo)浮選條件下,鎳黃鐵礦在接近中性礦漿條件下可浮性最好,而黃銅礦僅在高堿性條件下的可浮性較差,在p H分別為4.01、6.86、9.18時(shí),黃銅礦與鎳黃鐵礦的可浮電位區(qū)間相近,通過(guò)電位調(diào)控較難分離。(2)在捕收劑誘導(dǎo)條件下,鎳黃鐵礦在全p H值范圍內(nèi)均可浮,但仍在中性p H條件下浮選回收率最高,而黃銅礦在全p H值內(nèi)的可浮性均較好,與自誘導(dǎo)時(shí)相比,黃銅礦與鎳黃鐵礦的可浮性電位區(qū)間均變寬。(3)在自誘導(dǎo)和捕收劑體系中,礦漿電位隨p H值的升高而降低,硫化礦物只能在一定的電位區(qū)間內(nèi)具有可浮,過(guò)高或過(guò)低均會(huì)影響礦物的可浮性,且在捕收劑體系中硫化礦的可浮區(qū)間大于水體系的可浮區(qū)間。(4)黃銅礦和鎳黃鐵礦的循環(huán)伏安曲線結(jié)果表明,在水體系中,硫化礦的表面疏水產(chǎn)物為單質(zhì)S,電極表面的礦物被氧化生成單質(zhì)S的區(qū)間與礦物的可浮電位區(qū)間基本一致;在丁基黃藥體系中,丁基黃藥在鎳黃鐵礦和黃銅礦表面吸附并生成雙黃藥,使浮選回收率也隨之增大,而當(dāng)?shù)V漿電位升高到一定程度后,鎳黃鐵礦和黃銅礦表面被過(guò)度氧化,生成了S2O32-、SO42-、Cu(OH)2、Fe(OH)2、Ni(OH)2等親水性的氧化物,阻礙了雙黃藥在硫化礦表面的吸附,浮選回收率也隨之下降。(5)利用紅外光譜測(cè)試進(jìn)一步確定了鎳黃鐵礦和黃銅礦與丁基黃藥作用后的產(chǎn)物主要是雙黃藥,這與熱力學(xué)和循環(huán)伏安測(cè)試的結(jié)果是相一致的。在一定的礦漿電位區(qū)間內(nèi),其表面產(chǎn)物的紅外光譜強(qiáng)度、吸附量與浮選回收率均有一定的對(duì)應(yīng)關(guān)系,且表面產(chǎn)物的種類不隨礦漿電位的變化而改變。通過(guò)本文的研究,可以更加深入的了解硫化銅鎳礦電位調(diào)控浮選行為和與丁基黃藥的作用機(jī)理,為電位調(diào)控浮選在復(fù)雜硫化銅鎳礦中的應(yīng)用奠定了基礎(chǔ),給礦山實(shí)際生產(chǎn)提供了一定的理論指導(dǎo)。
[Abstract]:The ore properties of copper-nickel sulphide ore are generally complex, the floatability of sulphide minerals is similar, the surface oxidation phenomenon of the target minerals is obvious, coupled with the stimulation of inevitable ions, the mudding effect of gangue minerals is obvious. The flotation recovery and separation of copper-nickel minerals are difficult. In this paper, the flotation behavior of copper-nickel sulphide ores and the action mechanism of surface products are systematically studied. The flotation behavior and surface oxidation products of nickel pyrite and chalcopyrite under the conditions of self-induction and collector induction were investigated, which provided the basis for comprehensive recovery of copper-nickel sulphide ore. The main research contents are as follows: under the condition of self-induced flotation, the floatability of nickel pyrite is the best under the condition of near neutral pulp, but the floatability of chalcopyrite is poor only under the condition of high alkalinity. When pH is 4.01 ~ 6.86 and 9.18 respectively, the floating potential range of chalcopyrite and nickel pyrite is similar, and it is difficult to separate. (2) under the condition of collector induction, nickel pyrite can float in the whole pH range. But the flotation recovery is the highest under neutral pH, and the floatability of chalcopyrite is better in the whole pH value. Compared with self-induction, the range of floatability potential of chalcopyrite and nickel pyrite becomes wider. 3) in the system of self-induction and collector, the floatability potential range of chalcopyrite and nickel pyrite becomes wider. The pulp potential decreases with the increase of pH value. Sulfide minerals can only be floatable in a certain potential range. Too high or too low will affect the floatability of minerals. The results of cyclic voltammetry curves of chalcopyrite and nickel pyrite show that the floatability of sulphide ore in collector system is larger than that of water system. The hydrophobic product on the surface of sulphide ore is simple S.The range of oxidized minerals to form elemental S on the electrode surface is basically the same as the floatability potential interval of minerals, and in Ding Ji xanthate system, Ding Ji xanthate adsorbs on the surface of nickel pyrite and chalcopyrite and forms double xanthate, which increases the flotation recovery, but when the pulp potential increases to a certain extent, the surface of nickel pyrite and chalcopyrite is overoxidized. Hydrophilic oxides, such as S _ 2O _ 32-so _ 42-O _ (2) O _ (2) O _ (2) O _ (2) O _ (2) O _ (2) O _ (2) O _ (2) and so _ (2) O _ (2) O _ (2) O _ (2) O _ (2). The recovery rate of flotation also decreased. 5) the products of nickel pyrite and chalcopyrite interacting with Ding Ji xanthate were determined by infrared spectroscopy. It is consistent with the results of thermodynamic and cyclic voltammetry measurements. In a certain range of pulp potential, the infrared spectrum intensity, adsorption capacity and flotation recovery rate of the surface products are all related to each other. The types of surface products do not change with the change of slurry potential. Through the research in this paper, we can further understand the flotation behavior of copper nickel sulphide ore and the mechanism of its action with Ding Ji xanthate. It lays a foundation for the application of potential-regulated flotation in complex copper-nickel sulphide ores and provides certain theoretical guidance for the practical production of mines.
【學(xué)位授予單位】：江西理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD95;TD923

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 陳勇;宋永勝;;鎳黃鐵礦自誘導(dǎo)和外控電位浮選行為研究[J];金屬礦山;2010年10期

2 歐樂(lè)明,馮其明,張國(guó)范,盧毅屏;外控電位浮選設(shè)備中電極過(guò)程的電壓分布[J];科學(xué)技術(shù)與工程;2005年07期

3 歐樂(lè)明,馮其明,盧毅屏,陳建華;浮選過(guò)程中黃銅礦抑制的電化學(xué)研究[J];礦冶工程;1999年03期

4 王毓華;石灰抑制鎳黃鐵礦機(jī)理的研究[J];礦冶工程;1998年02期

5 孫水裕,王淀佐,李柏淡;硫化礦物表面氧化的研究[J];有色金屬;1993年04期

6 覃文慶;姚國(guó)成;顧幗華;邱冠周;王淀佐;;硫化礦物的浮選電化學(xué)與浮選行為[J];中國(guó)有色金屬學(xué)報(bào);2011年10期

相關(guān)博士學(xué)位論文 前3條

1 鄧敬石;中等嗜熱菌強(qiáng)化鎳黃鐵礦浸出的研究[D];昆明理工大學(xué);2002年

2 孫偉;高堿石灰介質(zhì)中電位調(diào)控浮選技術(shù)原理與應(yīng)用[D];中南大學(xué);2001年

3 鄧杰;低品位硫化鎳礦中含鎳硫化礦物同步疏水的理論與技術(shù)研究[D];中南大學(xué);2012年

，

本文編號(hào)：1497429