Cite this article as:

Bo Feng, Liangzhu Zhang, Wenpu Zhang, Huihui Wang, and Zhiyong Gao, Mechanism of calcium lignosulfonate in apatite and dolomite flotation system, Int. J. Miner. Metall. Mater., 29(2022), No. 9, pp.1697-1704. https://dx.doi.org/10.1007/s12613-021-2313-3
Bo Feng, Liangzhu Zhang, Wenpu Zhang, Huihui Wang, and Zhiyong Gao, Mechanism of calcium lignosulfonate in apatite and dolomite flotation system, Int. J. Miner. Metall. Mater., 29(2022), No. 9, pp.1697-1704. https://dx.doi.org/10.1007/s12613-021-2313-3
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木质素磺酸钙在磷灰石和白云石浮选体系中的作用机理

摘要: 由于磷灰石和白云石的物理化学性质相似,这两种矿物的分离比较困难。因此,在使用浮选法进行这种分离时,有必要寻找选择性抑制剂。以木质素磺酸钙为抑制剂,对磷灰石和白云石的分离行为进行了试验研究,并对其分离机理进行了分析。结果表明,木质素磺酸钙对磷灰石和白云石均有抑制作用,但在相同用量下,对白云石的抑制作用更强。机理分析表明,木质素磺酸钙对白云石的吸附能力高于对磷灰石的吸附能力,这是由于木质素磺酸钙与白云石上的钙位点反应强烈所致。此外,木质素磺酸钙与白云石之间存在氢键,这进一步阻止了油酸钠对白云石的吸附,从而大大抑制了白云石的浮选。

 

Mechanism of calcium lignosulfonate in apatite and dolomite flotation system

Abstract: Since the physical and chemical properties of apatite and dolomite can be similar, the separation of these two minerals is difficult. Therefore, when performing this separation using the flotation method, it is necessary to search for selective depressants. An experimental research was performed on the separation behavior of apatite and dolomite using calcium lignosulfonate as a depressant, and the mechanism by which this occurs was analyzed. The results show that calcium lignosulfonate has a depressant effect on both apatite and dolomite, but the depressant effect on dolomite is stronger at the same dosage. Mechanism analysis shows that the adsorptive capacity of calcium lignosulfonate on dolomite is higher than that of apatite, which is due to the strong reaction between calcium lignosulfonate and the Ca sites on dolomite. In addition, there is a hydrogen bond between calcium lignosulfonate and dolomite, which further prevents the adsorption of sodium oleate to dolomite, thus greatly inhibiting the flotation of dolomite.

 

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