聚(4-苯乙烯磺酸-共聚-马来酸)钠盐在磷灰石浮选脱镁中的机理研究  

The Mechanism of Poly(4-Styrenesulfonic Acid-co-Maleic Acid)Sodium Salt in the Removal of Dolomite from Apatite

作　　者：关智文 杨丙桥 曾梦媛 罗惠华[1] 邓冰[2] GUAN Zhiwen;YANG Bingqiao;ZENG Mengyuan;LUO Huihua;DENG Bing(School of Resources and Safety Engineering,Wuhan Institute of Technology,Wuhan 430073,China;Institute of Multipurpose Utilization of Mineral Resources,CAGS,Chengdu 610041,China)

机构地区：[1]武汉工程大学资源与安全工程学院,湖北武汉430073 [2]中国地质科学院矿产综合利用研究所,四川成都610041

出　　处：《金属矿山》2021年第8期95-101,共7页Metal Mine

基　　金：国家自然科学基金面上项目(编号:52074196)。

摘　　要：磷矿是我国重要的战略资源,由于大多数磷矿与白云石共生,且品位低,需要经过分离富集后才能有效利用。因此,拟开发出一种新型高效的白云石正浮选抑制剂——PSSMA,以取代传统的磷矿反浮选抑制剂的使用,通过单矿物浮选试验和人工混合矿试验考察其对磷灰石与白云石的浮选分离效果的影响,并通过FTIR、Zeta电位和XPS等表征手段研究其作用机理。试验结果表明,PSSMA可以有效地抑制白云石,而几乎不影响磷灰石的浮选;在PSSMA浓度为10 mg/L的条件下,人工混合矿取得了较好的分选效果,磷灰石的回收率高达94.29%,而白云石的回收率低至28.19%;FTIR、Zeta电位和XPS等测试结果表明PSSMA以化学吸附的形式作用在白云石表面,而在磷灰石表面以氢键形式进行吸附。NaOL能够取代磷灰石表面的PSSMA而不能取代白云石表面的PSSMA,从而实现磷灰石和白云石的浮选分离。因此,PSSMA作为一种用量少、选择性好、成本低、无毒环保的新型高效的白云石抑制剂,对解决磷矿正浮选脱镁的难题具有重要的意义。Phosphate ore is an important strategic resource in China.Because most of the phosphate ores are associated with dolomite in low grade,it needs to be separated and enriched before it can be used effectively.In this paper,a novel and efficient dolomite depressant,Poly(4-styrenesulfonic acid-co-maleic acid)sodium salt(PSSMA),was developed to replace the traditional phosphate ore reverse flotation depressant,and to investigate its effect on the flotation separation of apatite and dolomite by single mineral flotation test and artificial mixed ore test and to unveil its action mechanism by Fourier trans⁃form infrared spectroscopy(FTIR),Zeta potential and X-ray photoelectron spectroscopy(XPS).The results revealed that do⁃lomite could be effectively inhibited by PSSMA,but the flotation of apatite was hardly influenced,the artificial mixed ore achieved better separation effect when the dosage of PSSMA is 10 mg/L,the recovery rate of apatite was as high as 94.29%,and the recovery rate of dolomite was as low as 28.19%.The adsorption of PSSMA on the dolomite surface was chemisorp⁃tion,while the adsorption on the apatite surface was hydrogen bonding,and NaOL could replace PSSMA from apatite surface but it couldn′t substitute PSSMA from dolomite surface.Thus,the selective separation of apatite and dolomite was achieved.Therefore,PSSMA as a new and efficient dolomite depressant with low dosage,good selectivity,low cost,non-toxic and eco-friendly,is of great significance to solve the problem of removal of dolomite by direct flotation from phosphate ore.

关 键 词：磷灰石 白云石 选择性浮选 抑制剂 

分 类 号：TD923.1[矿业工程—选矿]