铁尾矿在碱性环境下的溶解特性

doi:10.11896/cldb.22010206

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Abstract The iron tailing was ground into powder by ball mill and soaked in NaOH and KOH solutions with different concentrations and temperatures. After soaking for 24 h, the solid-liquid separation was carried out. The chemical composition of the liquid phase and the mineral composition of the solid phase were analyzed by ICP-OES and XRD respectively. The results show that the main components dissolved in NaOH and KOH solutions are Si and Al in iron tailings, while the dissolution amounts of Ca, Fe and Mg are very low, and the order of dissolution amounts is Si＞Al＞＞ (Ca, Mg, Fe); the dissolution of Si and Al increases with increasing concentration and temperature. When the solution concentration reached 10 mol/L or the temperature reached 80 ℃, the dissolution increased significantly. Most minerals in iron tailing will be dissolved or transformed in alkali solutions. Quartz, albite and augite are largely dissolved; calcite is transformed into portlandite in high alkali concentration solution; hematite and clinochlore are relatively stable. However, hematite is partially dissolved at high temperature.

Key words： iron ore tailings alkali solution temperature concentration dissolution

Published: 10 September 2023 Online: 2023-09-05

CLC number:

TU528.01

Fund:National Natural Science Foundation of China (51772098) and the Natural Science Foundation of Hebei Province (E2021209145).

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	Articles by authors
	ZHANG Pengyi
	FENG Xiaoxin
	LIU Gang
	AN Yukun

Cite this article:

ZHANG Pengyi,FENG Xiaoxin,LIU Gang, et al. The Solubility of Iron Ore Tailing in Alkaline Environment[J]. Materials Reports, 2023, 37(17): 22010206-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22010206 OR http://www.mater-rep.com/EN/Y2023/V37/I17/22010206

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