Effect of acid corrosion on the surface roughness and floatability of magnesite and dolomite  

作　　者：Xiufeng Gong Jin Yao Wanzhong Yin Xueming Yin Xiaoqi Ban Yulian Wang 

机构地区：[1]State Key Laboratory of Mineral Processing,Beijing 102628,China [2]Key Laboratory of Solid Waste Treatment and Resource Utilization of the Ministry of Education,Southwest University of Science and Technology,Mianyang 621010,China [3]School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China [4]school of Materials Science and Engneering,Shenyang Ligong University,Shenyang 110159,China

出　　处：《Green and Smart Mining Engineering》2024年第1期118-125,共8页绿色与智能矿业工程（英文）

基　　金：supported by the Open Foundation of State Key Laboratory of Mineral Processing (No.BGRIMM-KJSKL-2024-07);the Open Project of the Key Laboratory of Solid Waste Treatment and Resource Utilization of the Ministry of Education,China (No.23kfgko2);the National Natural Science Foundation of China (Nos.51974064,52174239,and 52374259).

摘　　要：To modify surface roughness and improve flotation performance,hydrochloric acid etching pretreatment was performed on magnesite and dolomite.Flotation tests disclosed that acid corrosion improved the flotation kinetics and flotation recovery rates of magnesite and dolomite.Under pulp pH 10 and sodium oleate(NaOl)concentration 20 mg·L^(-1),the flotation recovery rates of magnesite and dolomite after acid etching increased by 31.05%and 29.20%,respectively,compared with those before acid etching.Adsorption density tests proved that the adsorption density of NaOl on magnesite and dolomite was higher after acid etching than before acid etching,implying that acid etching drives Naol adsorption.Zeta potential analysis revealed that acid etching reduces the point of zero charge of magnesite and dolomite.Atomic force microscopy and X-ray photoelectron spectroscopy results demonstrated that acid corrosion modified the surface roughness of magnesite and dolomite,increasing the magnesium(Mg)content on the magnesite surface and the calcium and Mg contents on the dolomite surface.Contact angle measurements indicated that acid corrosion slightly reduced the contact angle between magnesite and dolomite.With Naol present on the surface,the contact angles of magnesite and dolomite after acid etching significantly increased compared with those before acid etching.Therefore,acid etching is effective in improving the floatability of magnesite and dolomite.

关 键 词：Acid corrosion Surface roughness Flotation rate MAGNESITE DOLOMITE 

分 类 号：X701[环境科学与工程—环境工程] TQ424[化学工程]