脂类捕收剂DLZ对黄铁矿浮选的影响及其作用机理  

Effects of collector DLZ on flotation of pyrite and its mechanism

作　　者：张麟[1,2] 李建华[1,2] 顾帼华[1] 孙小俊[1] 刘玉林[1] 胡岳华[1] 

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083 [2]大冶有色金属公司,湖北黄石435005

出　　处：《中南大学学报（自然科学版）》2009年第5期1159-1164,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50674102);教育部"高等学校优秀青年教师教学科研奖励计划"项目(2002年)

摘　　要：通过浮选实验,吸附量和红外光谱测定,考察脂类捕收剂DLZ对黄铁矿可浮性的影响及作用机理。研究结果表明,DLZ在整个pH范围内对黄铁矿的捕收能力弱,黄铁矿回收率小于24%;在低铜离子浓度(1mol/L)下,对黄铁矿回收率影响不大;当铜离子浓度增加至4mol/L,pH值为2.7时,黄铜矿回收率达到42%;在碱性条件下,黄铁矿回收率与不加铜离子时的回收率相当;DLZ在黄铁矿表面的吸附量随其用量的增加而增大;加入铜离子对DLZ在黄铁矿表面的吸附有促进作用;DLZ与黄铁矿作用前后,以及加入铜离子后的红外光谱图基本没有变化,即DLZ在黄铁矿表面的吸附属于物理吸附;加入CaO后在873.7cm?1和797.7cm?1处出现2个吸收峰,表明黄铁矿表面附着Ca(OH)2等含钙的化合物,阻止了DLZ在矿物表面的吸附,降低了黄铁矿的可浮性。The interaction mechanism of collector-DLZ in flotation of pyrite was investigated by flotation experiments,adsorption capacity measurements and FTIR-DRIR.The flotation experimental results show that the collecting ability of DLZ to pyrite is feeble in the whole rang of pH.The recovery of pyrite is less than 24%,and has little change in the presence of low concentration Cu^2 ＋（1 mol/L）.Increasing dosage of Cu ^2＋to 4 mol/L,the recovery of pyrite reaches 42% at pH=2.7,while in alkaline condition,there is no significant change.Adsorption capacity measurements demonstrate that the adsorption capacity of DLZ on pyrite surface is proportional to the dosage of DLZ.The presence of Cu ^2＋ enhances the adsorption of DLZ on pyrite surface in some extent.FTIR-DRIR results prove that the infrared spectrum of pyrite interacts with DLZ and Cu^2 ＋has no obvious change,which indicates the adsorption of DLZ on the pyrite surface is physical adsorption.Adding CaO brings about two absorption peaks（at 873.7 cm^- 1 and 797.7 cm^-1）,and shows that there are some Ca（OH）2 and other calcium compounds which adhere to pyrite surface,and prevent adsorption of DLZ on pyrite surface,thus the flotation of pyrite is reduced.

关 键 词：黄铁矿 捕收剂 吸附量 浮选 

分 类 号：TD923.1[矿业工程—选矿]