十二胺浮选脱硫副产物亚硫酸镁实验及其机理研究

doi:10.19964/j.issn.1006-4990.2022-0143

Abstract

Abstract:

The flotation of magnesium sulfite which was the by-product of desulfurization，had been studied by using the primary roughing and primary cleaning process.The effects of particle size，the dosage of dodecylamine collector and water glass regulator on the flotation of desulfurization by-product magnesium sulfite were analyzed，the interaction mechanism between dodecylamine and desulfurization by-product magnesium sulfite was investigated by infrared spectrum and Zeta potential.The results showed that magnesium sulfite with grade of 35.78% and recovery of 56.8% could be obtained under the optimum roughing conditions：collector dodecylamine dosage of 120 g/t，sodium silicate dosage of 150 g/t，mass ratio of 82.8%（particle size of by-product of -0.074 mm）and the cleaning agent dosage of 20% of roughing.The analysis of infrared spectroscopy and Zeta potential showed that the interaction principle of dodecylamine and magnesium sulfite was mainly electrostatic adsorption，accompanied by weak chemical adsorption.

Key words: dodecylamine, desulfurization by-products, magnesium sulfite, flotation mechanism

CLC Number:

TQ110.3

LIAO Shengde,YANG Yaofeng,LI Yaxin,WU Hao. Study on flotation experiment and mechanism of desulfurization by-product magnesium sulfite using dodecylamine[J]. Inorganic Chemicals Industry, 2023, 55(2): 113-118.

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产品	产率/%	品位	镁分配率/%
原矿	100	25.84%	100
精矿	41.02	35.78%	56.8
尾矿	10.2	27.21%	10.74
溶解	48.78	6.38 g/L	32.46

改性剂	ζ-电位/mV
改性剂	亚硫酸镁	酸不溶物
十二胺	-11.30	3.62
十二胺+水玻璃	-13.67	0.75
空白样	-0.56	-8.88

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Inorganic Acid-Base-Salt Committee of CIESC

Study on flotation experiment and mechanism of desulfurization by-product magnesium sulfite using dodecylamine

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