Effect of Fe3+ and Sodium Silicate As Combination Inhibitors on Flotation Separation of Fluorite and Calcite
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摘要:
萤石和方解石表面都存在Ca2+的活性位点且两种矿物表面性质相近，导致萤石和方解石的分离难度较大。通过单矿物浮选试验、吸附量测定、Zeta电位测量以及浮选溶液化学计算，并引入Fe3+，将其与水玻璃混合，研究该组合抑制剂对萤石和方解石浮选分离的影响及其机理。浮选试验结果表明，与水玻璃相比，Fe-水玻璃选择性抑制了方解石的浮选，实现了两种矿物的分离。机理测试结果表明，Fe3+与水玻璃在溶液中反应的产物Fe-水玻璃聚合物以及水玻璃的水解组分Si（OH）4在方解石表面发生较强的吸附作用，阻碍了油酸钠的进一步吸附，从而抑制了方解石的浮选。
Abstract:The separation of fluorite and calcite is difficult, because there are Ca2+ active sites on the surface of fluorite and calcite, and the surface properties of the two minerals are similar. Through single mineral flotation test, adsorption amount measurement, Zeta potential measurement and chemical calculation of flotation solution, Fe3+ was introduced and mixed with sodium silicate to study the effect of the combined inhibitor on flotation separation of fluorite and calcite and its mechanism. Flotation test results show that, Fe- sodium silicate selectively inhibits the flotation of calcite compared with sodium silicate, and realizes the separation of the two minerals. The mechanism test results show that the Fe- sodium silicate polymer formed by Fe2+ and sodium silicate in solution and the hydrolyzed component Si(OH)4 have strong adsorption on the surface of calcite, which hinders the further adsorption of sodium oleate and thus inhibits the flotation of calcite.
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Key words:
- fluorite /
- calcite /
- Fe3+ /
- sodium silicate /
- flotation separation
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表 1 试验所用药剂一览表
Table 1. List of agents used in the test
药剂名称 分子式 品级 生产厂家 盐酸 HCl 分析纯 国药集团化学试剂有限公司 氢氧化钠 NaOH 分析纯 国药集团化学试剂有限公司 六水氯化铁 FeCl3·6H2O 分析纯 国药集团化学试剂有限公司 油酸钠 C17H33COONa 分析纯 上海迈坤化工有限公司 水玻璃 Na2O·mSiO2 工业纯 取自生产现场 
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表 2 试验所用设备一览表
Table 2. List of instruments and equipment used in the test
仪器设备 设备型号 生产厂家 陶瓷球磨机 WZM 宜兴市丁蜀镇浩强机械厂 挂槽浮选机 XFGCⅡ 吉林省探矿机械厂 真空抽滤机 SHB-Ⅲ 巩义市英峪华科仪器厂 电热恒温鼓风干燥箱 DHG-9123A 上海一恒科学仪器有限公司 超纯水仪 QYSW-05A 重庆前沿水处理设备有限公司 精密电子天平 JA2003 上海恒平科学仪器有限公司 精密pH计 PHSJ-4F 上海仪电科学仪器股份有限公司 紫外分光光度计 UVprobe2550 日本岛津株式会社 Zeta电位分析仪 NanoZS90 英国马尔文仪器有限公司 X射线衍射仪 pHilips X’Pert PRO 荷兰帕纳科公司
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