(1. 西北有色地質(zhì)礦業(yè)集團有限公司，西安 710054；
2. 北京礦冶研究總院 礦物加工科學(xué)與技術(shù)國家重點實驗室，北京 100160；
3. 西安建筑科技大學(xué) 資源工程學(xué)院，西安 710054；
4. 格林美股份有限公司，深圳 518101)
摘 要: 為了消除硫化銅鎳礦物表面的氧化膜，抑制蛇紋石等含鎂脈石礦泥對浮選影響，在硫化銅鎳礦的酸性浮選工藝的基礎(chǔ)上研究了羧甲基纖維素(CMC)對硫化銅鎳礦浮選過程的優(yōu)化效果，并探討了CMC的作用機理。結(jié)果表明：1×10-3 mol/L鹽酸溶液及20 min超聲預(yù)處理可以顯著強化硫化銅鎳礦的可浮性，酸性浮選體系可以在更寬的pH范圍內(nèi)取得較好的回收率；在pH=3的酸性體系中添加20 mg/L CMC，硫化銅鎳礦浮選精礦鎳品位提高至19.42%，回收率提高至60.05%；分別比同等條件下不添加CMC的浮選指標(biāo)分別提高了1.78%和22.79%；CMC對蛇紋石礦泥選擇性抑制是其優(yōu)化硫化銅鎳礦浮選過程的主要原因；濁度及表面動電位測試表明CMC加入量必須控制于20 mg/L以內(nèi)，過量的CMC產(chǎn)生有團聚作用，不利于礦泥顆粒間的分散。
關(guān)鍵字: 蛇紋石；銅鎳硫化礦；礦泥；浮選；羧甲基纖維素
（1. Northwest Mining and Geology Group Co., Ltd., for Nonferrous Metals, Xi’an 710054, China;
2. State Key Laboratory of Mineral Processing, Beijing General Research Institute of Mining and Metallurgy, Beijing 100160, China;
3. School of Resources Engineering, Xi’an University of Architecture and Technology, Xi’an 710054, China;
4. GEM Co., Ltd., Shenzhen 518101, China）
Abstract:The optimization effect of carboxymethyl cellulose(CMC) in the acid flotation of vulcanized copper-nickel was studied in order to eliminate the oxide film on the surface of Copper-Nickel sulfide ore and inhibit the influence of magnesium-containing mineral, such as serpentine. And the mechanism of CMC’s action was discussed. The results show that the floatability of copper-nickel sulfide ore can be significantly enhanced by the pretreatment of 1×10-3 mol/L hydrogen chloride solution and 20 min ultrasonic. And there can obtain a better recovery rate in the wider pH range of acid flotation. After adding 20 mg/L CMC to the ore slurry with pH of 3, the nickel grade of concentrate and the recovery rate increase to 19.42% and 60.05%, respectively, which are 1.78% and 22.79% higher than those without CMC. It is the main reason for optimizing the flotation that the CMC has selective suppression of serpentine slime. The turbidity and surface dynamic potential test show that the dosage of CMC must be controlled within 20 mg/L. The excess CMC has a cohesion effect, which is not conducive to dispersion between the mud particles.
Key words: serpentine; copper-nickel sulfide ore; slime; flotation; carboxymethyl cellulose
