金属离子对白云石矿物颗粒分散行为的影响

doi:10.19964/j.issn.1006-4990.2023-0206

Abstract

Abstract:

In order to study the effect of metal ions on the dispersion and agglomeration behavior of dolomite slurry system，the effects of slurry pH value and Ca²⁺，Mg²⁺，Fe³⁺ and Al³⁺ metal ions on the turbidity of dolomite slurry were studied by turbidity experiment.Zeta potential，XPS analysis and classical DLVO theoretical model were used for characterization.The results showed that the metal ions and pulp pH value had different degrees of inhibition on the dispersion behavior of dolomite particles.Under the condition of no metal ions added，the turbidity value of the pulp was maintained at about 400 NTU in the pH range of 4~10，and the dolomite particles were well dispersed.After adding metal ions，the turbidity of dolomite slurry was decreased to varying degrees.The order of inhibition ability of several metal ions on dolomite dispersion behavior was Fe³⁺，Al³⁺，Mg²⁺，Ca²⁺.The analysis showed that in a certain pH range，metal ions were attached to the surface of dolomite particles through hydroxyl complexes or precipitates，eliminating the interaction energy barrier between dolomite particles，and the particles were aggregated by bridging，thus destroying the dispersion behavior of dolomite particles in the slurry system.

Key words: microfine particle, dolomite, metal ions, dispersion behavior

CLC Number:

P574

YUAN Xing, DONG Wenyan, WANG Mingshun, CHENG Dilan, AO Xianquan. Effect of metallic ions on dispersion behavior of dolomite mineral particles[J]. Inorganic Chemicals Industry, 2024, 56(2): 44-50.

Figures/Tables 12

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References 23

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pH	条件	白云石表面原子质量分数/％
pH	条件	Ca	Mg	Fe	Al
—	未添加离子	12.40	14.05	3.99	1.63
12	Ca²⁺	16.76	13.50	0.87	1.63
12	Mg²⁺	14.24	32.59	1.03	2.29
8	Fe³⁺	12.37	14.56	4.53	1.63
8	Al³⁺	12.11	11.73	0.68	11.80

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Inorganic Acid-Base-Salt Committee of CIESC

Effect of metallic ions on dispersion behavior of dolomite mineral particles

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