新型阳离子捕收剂对石英的捕收性能及作用机理  

Collecting Performance and Mechanism of a New Cation Collector to Quartz

作　　者：朱一民[1] 陈佳丽[1] 贾静文[1] 刘双安 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]鞍钢集团矿业设计研究院,辽宁鞍山114021

出　　处：《金属矿山》2015年第5期81-84,共4页Metal Mine

基　　金：国家自然科学基金项目(编号:51274056;51474055);"十二五"国家科技支撑计划项目(编号:2012BAB14B05);国土资源部基金项目(编号:12120113086600)

摘　　要：用东北大学研制的新型高效阳离子捕收剂DBA-1对石英纯矿物进行了药剂用量、浮选温度、合适酸碱度试验,并借助Zeta电位测定、红外光谱分析和接触角测定对DBA-1浮选石英的机理进行了分析,以检验DBA-1对石英的捕收性能及效果。结果表明：10.074-0.038 mm粒级石英纯矿物在p H=8.5、矿浆温度为18℃、药剂用量为75 mg/L的情况下可获得97.3%的回收率。2在无DBA-1的矿浆中,石英零电点的p H=2.26,而与DBA-1作用后的零电点偏移至10.10,说明DBA-1可以以阳离子形式在石英表面发生静电吸附;DBA-1与石英作用前后的红外光谱分析表明,二者间存在氢键吸附。3DBA-1的添加可大幅度提高石英表面的接触角,增强其表面的疏水性和可浮性,接触角在12.6°-27.0°范围内的小幅增大都会引起回收率的大幅度提高。The flotation behavior, including the dosage of collector, the temperature and pH of pulp, on quartz using DBA-1 as a new collector developed by Northeastern University was investigated. Zeta potentials, infrared spectrum analysis and con-tact angle measurement were used to detect the interaction mechanism of the of the quartz surface with DBA-1, to check out thecollecting performance of DBA-1 on quartz. The results show that （1）Recovery of 97.3% on quartz flotation is obtained at theoptimum conditions of particle size from 0. 038 to 0. 074 mm, pulp pH 8.5, slurry temperature 18 ℃ , and the dosage of collec-tor 75 mg/L. （2）After adding DBA-I to the slurry,point of zero charge on quartz surface increased from 2.26 to 10.10. It is in-dicated that adsorption of DBA-1 occurred on the quartz surface. The adsorption mainly includes electrostatic adsorption andhydrogen bonding adsorption. （3）The quartz surface contact angle was increased obviously after adding DBA＇I, which enhancedits hydrophobicity and floatability, and the recovery rate will be improved significantly when the contact angle slightly raise from12.6°-27.0°.

关 键 词：阳离子捕收剂DBA-1 石英 浮选 作用机理 

分 类 号：TD923[矿业工程—选矿]