Flocculation Effect of Ferric Chloride on Ultra−fine Tailings

NIU Fusheng; CHEN Yuying; ZHANG Jinxia; LIU Fei

doi:10.13779/j.cnki.issn1001-0076.2024.08.004

2024 Vol. 44, No. 6

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Article navigation > Conservation and Utilization of Mineral Resources > 2024 > 44(6): 64-70

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NIU Fusheng, CHEN Yuying, ZHANG Jinxia, LIU Fei. Flocculation Effect of Ferric Chloride on Ultra−fine Tailings[J]. Conservation and Utilization of Mineral Resources, 2024, 44(6): 64-70. doi: 10.13779/j.cnki.issn1001-0076.2024.08.004

Citation:

NIU Fusheng, CHEN Yuying, ZHANG Jinxia, LIU Fei. Flocculation Effect of Ferric Chloride on Ultra−fine Tailings[J]. Conservation and Utilization of Mineral Resources, 2024, 44(6): 64-70. doi: 10.13779/j.cnki.issn1001-0076.2024.08.004

Flocculation Effect of Ferric Chloride on Ultra−fine Tailings

1.
North China University of Science and Technology, Tangshan 063210, Hebei, China
2.
Hebei Province Mining Industry Develops with Safe Technology Priority Laboratory mining industry develops with safe technology priority laboratory, Tangshan 063210, Hebei, China

More Information

Corresponding author: CHEN Yuying, 13939191383@163.com

Received Date: 19 January 2024

Publish Date: 15 December 2024

Abstract

Abstract

With the advancement of mineral processing technology, the diameter of tailings is getting smaller and smaller, even reaching the ultra−fine level. In order to realize the high concentration filling of ultrafine tailings in the concentrator, the flocculation settling and thickening of ultrafine tailings is the critical technology. Therefore, the flocculation of certain ultrafine iron tailings was studied with ferric chloride produced from iron and steel hydrochloric acid pickling waste liquor as a flocculant. The effects of ferric chloride dosage, stirring speed, and stirring time on the flocculation of ultra-fine iron tailings were investigated using an industrial CCD camera and image processing software (Image−Pro Plus). The experimental results show that when the amount of FeCl₃ was 2700 g/t, the speed of the magnetic stirrer was 800 r/min, the stirring time was 80 s, the particle size of the floc was 39.79 μm, and the fractal dimension was 1.92. Based on the Box−Behnken principle, response surface methodology was used to establish the multiple regression equation of the interaction among the amount of flocculant FeCl₃, stirring speed, and stirring time on the flocculation of ultra−fine tailings, and ANOVA was used to analyse the experimental results. The results showed that the optimum conditions were 2763.74 g/t of ferric chloride, 832.76 r/min of stirring speed, 95.89 s of stirring time, and 40.28 μm of floc particle size, and 1.92 of fractal dimension predicted by the model, which were consistent with the experimental results. The effect law of superfine tailings is obtained by studying flocculation conditions, which provides theoretical support for the practice of high-efficiency flocculation of superfine tailings. This study also realize the comprehensive utilization of waste acid, which is conducive to energy saving and emission reduction and reduces the cost of industrial production.
- iron tailings /
- ultra−fine /
- flocculation /
- response surface method

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References

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