D201树脂从高碳石煤发电灰渣酸浸液提钒的工艺研究  

Study on Process of Vanadium Extraction from Acid Leaching Solution of Power Generation Ash of High-Carbon Stone Coal by D201 Resin

作　　者：郭拴全 牛芳银 康敏 郭梅 宁新霞 邢相栋[3] GUO Shuan-quan;NIU Fang-yin;KANG Min;GUO Mei;NING Xin-xia;XING Xiang-dong(Xi'an Northwest Nonferrous Geological Research Institute Co.,Ltd.,Xi'an 710054,China;Shaanxi Engineering and Technology Research Center for Comprehensive Utilization of Mineral Resources,Xi'an 710054,China;School of Metallurgical Engineering,Xi'an University of Architecture and Technology,Xi'an 710054,China)

机构地区：[1]西安西北有色地质研究院有限公司,陕西西安710054 [2]陕西省矿产资源综合利用工程技术研究中心,陕西西安710054 [3]西安建筑科技大学冶金工程学院,陕西西安710054

出　　处：《稀有金属与硬质合金》2025年第1期40-46,共7页Rare Metals and Cemented Carbides

基　　金：陕西省科学技术厅项目(2022ZDLSF07-10)。

摘　　要：采用离子交换法对某地高碳石煤钒矿发电灰渣经空白焙烧后的酸浸液进行净化与钒富集,研究了不同因素对钒吸附和解吸的影响,并确定了吸附与解吸的最佳工艺条件。结果表明,酸浸液pH值为2.3,无须中和可直接进行离子交换;各类树脂对钒的吸附能力强弱顺序为D201>D380>D314>D202,解吸过程以采用NaOH与NaCl的混合解吸剂最佳,二者适宜的质量比为3∶1。采用D201树脂最优的动态吸附条件为:氯酸钠用量为0.05倍V_(2)O_(5)质量,每小时进料量为2倍树脂体积。当c/c_(0)=0.5时V_(2)O_(5)吸附容量为186 mg/g,当c/c_(0)=0.8时V_(2)O_(5)吸附容量为283 mg/g,当树脂被穿透时吸附率为98.53%。以6%NaOH+2%NaCl溶液作为解吸剂对负载D201树脂进行解吸,当V_(解吸剂)/V_(湿树脂)=4.36时,解吸液V_(2)O_(5)含量达到峰值75.46 g/L;当V_(解吸剂)/V_(湿树脂)=7.44时,钒的解吸率达到99.31%。解吸后的D201树脂经HCl再生后对钒的吸附能力与新D201树脂相当。解吸所得富钒液经除杂、中和、沉钒、煅烧可制得纯度98.98%的V_(2)O_(5)产品。The ion exchange method was used to purify the acid leaching solution of power generation ash from high-carbon stone coal vanadium ore after blank roasting and enrich vanadium.The influence of different factors on vanadium adsorption and desorption was studied,and the optimal process conditions for adsorption and desorption were determined.The results show that the acid leaching solution has a pH value of 2.3,and can directly undergo ion exchange without neutralization.The order of vanadium adsorption capacity of various resins is D201>D380>D314>D202,the mixed desorption agent of NaOH and NaCl is the best in the desorption process,and the appropriate mass ratio of the two is 3∶1.The optimal dynamic adsorption conditions of D201 resin are as follows:the sodium chlorate dosage is 0.05 times the mass of V_(2)O_(5),and the feed rate per hour is 2 times the resin volume.The V_(2)O_(5)adsorption capacity is 186 mg/g and 283 mg/g,respectively when c/c_(0)value is 0.5 and 0.8,and the adsorption rate is 98.53%when the resin is penetrated.When the D201 resin is desorbed with 6%NaOH+2%NaCl solution as the desorption agent,and the volume ratio of desorption solution to wet resin is 4.36,the V_(2)O_(5)content of the desorption solution reaches a peak of 75.46 g/L.When the volume ratio of desorption solution to wet resin is 7.44,the desorption rate of vanadium reaches 99.31%.The vanadium adsorption capacity of the desorbed D201 resin after regeneration by HCl is comparable to that of the new D201 resin.V_(2)O_(5)product with purity of 98.98%can be prepared by impurity removal,neutralization,vanadium precipitation and calcination of vanadium-rich solution obtained by desorption.

关 键 词：D201树脂 发电灰渣 钒 酸浸液 离子交换 

分 类 号：TF841.3[冶金工程—有色金属冶金]