(1. 江西理工大學(xué) 江西省礦業(yè)工程重點(diǎn)實(shí)驗(yàn)室，贛州 341000；
2. 礦冶科技集團(tuán)有限公司 礦物加工科學(xué)與技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室，北京102628；
3. 中南大學(xué) 戰(zhàn)略含鈣礦物資源清潔高效利用湖南省重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083；
4. 江西下壟鎢業(yè)有限公司，大余 341500)
摘 要: 采用浮選試驗(yàn)、紅外光譜測(cè)試和XPS分析等技術(shù)研究刺槐豆膠、海藻酸鈉和殼聚糖三種有機(jī)抑制劑在輝鉬礦和滑石浮選分離中的作用。結(jié)果表明：在丁基黃藥為捕收劑浮選體系中，海藻酸鈉對(duì)輝鉬礦和滑石均無(wú)抑制作用，殼聚糖同時(shí)抑制了兩種礦物的浮選，刺槐豆膠可以選擇性地抑制滑石的浮選，從而實(shí)現(xiàn)兩種礦物的浮選分離。海藻酸鈉未在兩種礦物表面發(fā)生吸附，殼聚糖強(qiáng)烈吸附在兩種礦物表面，刺槐豆膠和丁基黃藥在輝鉬礦表面發(fā)生競(jìng)爭(zhēng)吸附；刺槐豆膠在輝鉬礦表面的預(yù)先物理吸附無(wú)法完全阻止丁基黃藥在輝鉬礦表面的化學(xué)吸附。
關(guān)鍵字: 輝鉬礦；滑石；有機(jī)抑制劑；浮選；分離機(jī)理
（1. Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
2. State Key Laboratory of Mineral Processing, BGRIMM Technology Group, Beijing 102628, China;
3. Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Central South University, Changsha 410083, China;
4. Jiangxi Xialong Tungsten Industry Co., Ltd., Dayu 341500, China）
Abstract:The roles of three organic depressants, locust bean gum(LBG), sodium alginate(SA) and chitosan(CS), were investigated in the flotation separation of molybdenite and talc through flotation experiments, Fourier transform infrared (FTIR) spectroscopy test and X-ray photoelectron spectroscopy (XPS) analysis. The results show that, in the flotation system of potassium butylxanthate(PBX) as a collector, SA has no depressive effect on molybdenite and talc, CS simultaneously depresses the flotation of the two minerals, LBG can selectively depress the flotation of talc, thus realizing the flotation separation of the two minerals. SA is not adsorbed on the surfaces of the two minerals, while CS is strongly adsorbed on the surfaces of the two minerals. LBG and PBX undergo competitive adsorption on the surface of molybdenite, and the prior physical adsorption of LBG on the molybdenite surface cannot completely prevent the chemical adsorption of PBX on the molybdenite surface.
Key words: molybdenite; talc; organic depressant; flotation; separation mechanism
