油酸钠体系下粗糙度对白云石可浮性的影响及其机理

doi:10.12068/j.issn.1005-3026.2023.08.016

东北大学学报（自然科学版） ›› 2023, Vol. 44 ›› Issue (8): 1188-1194.DOI: 10.12068/j.issn.1005-3026.2023.08.016

油酸钠体系下粗糙度对白云石可浮性的影响及其机理

赵旭¹，印万忠¹，姚金¹，朱张磊²

(1.东北大学资源与土木工程学院，辽宁沈阳110819； 2.西安科技大学化学与化工学院，陕西西安710054)

发布日期:2023-08-15
通讯作者: 赵旭
作者简介:赵旭(1998-)，男，辽宁锦州人，东北大学硕士研究生；印万忠(1970-)，男，浙江临安人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(52174239)；陕西省自然科学基础研究计划项目(2022JQ-353).

Effect of Roughness on Floatability of Dolomite in Sodium Oleate System and Its Mechanism

ZHAO Xu¹， YIN Wan-zhong¹， YAO Jin¹， ZHU Zhang-lei²

1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China； 2. College of Chemistry and Chemical Engineering， Xian University of Science and Technology， Xian 710054， China.

Published:2023-08-15
Contact: YIN Wan-zhong
About author:-
Supported by:
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摘要/Abstract

摘要： 为研究表面物理性质对矿物可浮性的影响，本文通过超声预处理获得两种具有不同表面粗糙度的白云石颗粒，在油酸钠(NaOL)体系下，通过单矿物浮选试验考察了表面粗糙度对白云石浮选回收率的影响，并借助原子力显微镜(AFM)，BET，SEM-EDS，XPS，紫外分光光度计以及接触角测量仪，探讨了表面粗糙度对矿物浮选行为的影响机理.结果表明:超声处理使得白云石颗粒表面具有更大的粗糙度值，粗糙颗粒表面的活性位点(Ca²⁺和Mg²⁺)含量高于光滑颗粒表面，有助于NaOL在矿物表面的吸附，使其具有更强的疏水性和可浮性.

关键词: 白云石；粗糙度；浮选；活性位点；超声处理

Abstract: In order to study the influence of surface physical properties on mineral floatability， two kinds of dolomite particles with different surface roughness were obtained by ultrasonic pretreatment. In sodium oleate system， the influence of surface roughness on the recovery rate of dolomite flotation was investigated by single mineral flotation test， and atomic force microscope(AFM)， BET， SEM-EDS， XPS， ultraviolet spectrophotometer and contact angle measuring instrument were used. The mechanism of the impact of surface roughness on mineral flotation behavior was discussed. The results show that ultrasonic treatment increases the surface roughness of dolomite particles and the content of active sites (Ca²⁺ and Mg²⁺) on the surface of rough particles is higher than that on the surface of smooth particles. This contributes to the adsorption of sodium oleate on mineral surface， enhancing its hydrophobicity and floatability.

Key words: dolomite； roughness； flotation； active site； ultrasonic treatment

中图分类号:

TD927

赵旭，印万忠，姚金，朱张磊. 油酸钠体系下粗糙度对白云石可浮性的影响及其机理[J]. 东北大学学报（自然科学版）, 2023, 44(8): 1188-1194.

ZHAO Xu， YIN Wan-zhong， YAO Jin， ZHU Zhang-lei. Effect of Roughness on Floatability of Dolomite in Sodium Oleate System and Its Mechanism[J]. Journal of Northeastern University(Natural Science), 2023, 44(8): 1188-1194.

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油酸钠体系下粗糙度对白云石可浮性的影响及其机理

Effect of Roughness on Floatability of Dolomite in Sodium Oleate System and Its Mechanism

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