硅锰渣基沸石的合成及其表征

doi:10.19964/j.issn.1006-4990.2023-0140

Abstract

Abstract:

Silicon manganese slag is an industrial by-product produced in the production of silicon manganese alloy.With huge annual discharge and low comprehensive utilization level，it has become an urgent problem for the green development of metallurgy industry.In order to realize high value utilization of silicon manganese slag，zeolite was prepared from silicon manganese slag by hydrothermal synthesis reaction of “pickling-alkali melting-aging-crystallization”.X-ray diffractometer（XRD），scanning electron microscope（SEM），Fourier infrared spectrometer（FT-IR），surface area and aperture analyzer were used to characterize the crystal phase，morphology and functional groups of zeolite.The effects of alkalinity，temperature and time on the phase composition and morphology of zeolite were investigated.The experimental results showed that the contents of MnO，Fe₂O₃ and CaO were reduced after acid leaching，and silicates required for zeolite synthesis were generated in the alkali melting system.The zeolite with good purity and crystallinity was synthesized under the optimum conditions of 0.5 mol/L alkalinity，80 ℃ temperature and 8 h.Compared with traditional industrial solid waste preparation of zeolite，the alkalinity required for crystallization in this experiment was lower，and silicon manganese slag was used as raw material to prepare zeolite，which provided a new idea for the high value utilization of silicon manganese slag.

Key words: silicon manganese slag, zeolite, hydrothermal reaction, acid leaching, alkali melting

CLC Number:

TQ127.2

DONG Xiongwei, HAN Fenglan, HUA Wei, LI Maohui, AN Changcong, HUANG Yucai. Synthesis and characterization of silico-manganese slag zeolite[J]. Inorganic Chemicals Industry, 2023, 55(12): 128-132.

Figures/Tables 7

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References 17

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样品	w（SiO₂）	w （Al₂O₃）	w （Fe₂O₃）	w（CaO）	w（MgO）	w （K₂O）	w （Na₂O）	w（MnO）	w（其他）
原渣	43.56	10.1	1.29	20.09	11.01	0.97	1.75	5.25	5.98
酸浸后	68.84	12.2	0.58	4.18	1.56	0.38	0.24	1.12	10.9
碱熔融	24.85	3.73	0.33	9.41	2.41	0.48	53.16	4.39	5.63
样品C3	46.55	13.11	0.47	16.99	7.37	0.16	10.19	3.89	1.27

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Synthesis and characterization of silico-manganese slag zeolite

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样品编号	氢氧化钠浓度/（mol·L^-1）	时间/ h	温度/ ℃	样品编号	氢氧化钠浓度/（mol·L^-1）	时间/ h	温度/ ℃
A1	0.2	10	90	B6	0.5	10	90
A2	0.4	10	90	B7	0.5	11	90
A3	0.5	10	90	B8	0.5	12	90
A4	0.8	10	90	C1	0.5	8	60
A5	1.0	10	90	C2	0.5	8	70
A6	1.5	10	90	C3	0.5	8	80
B1	0.5	3	90	C4	0.5	8	90
B2	0.5	6	90	C5	0.5	8	100
B3	0.5	7	90	C6	0.5	8	110
B4	0.5	8	90	C7	0.5	8	120
B5	0.5	9	90	C8	0.5	8	130

样品编号	氢氧化钠浓度/（mol·L^-1）	时间/ h	温度/ ℃	样品编号	氢氧化钠浓度/（mol·L^-1）	时间/ h	温度/ ℃
A1	0.2	10	90	B6	0.5	10	90
A2	0.4	10	90	B7	0.5	11	90
A3	0.5	10	90	B8	0.5	12	90
A4	0.8	10	90	C1	0.5	8	60
A5	1.0	10	90	C2	0.5	8	70
A6	1.5	10	90	C3	0.5	8	80
B1	0.5	3	90	C4	0.5	8	90
B2	0.5	6	90	C5	0.5	8	100
B3	0.5	7	90	C6	0.5	8	110
B4	0.5	8	90	C7	0.5	8	120
B5	0.5	9	90	C8	0.5	8	130

样品编号	氢氧化钠浓度/（mol·L^-1）	时间/ h	温度/ ℃	样品编号	氢氧化钠浓度/（mol·L^-1）	时间/ h	温度/ ℃
A1	0.2	10	90	B6	0.5	10	90
A2	0.4	10	90	B7	0.5	11	90
A3	0.5	10	90	B8	0.5	12	90
A4	0.8	10	90	C1	0.5	8	60
A5	1.0	10	90	C2	0.5	8	70
A6	1.5	10	90	C3	0.5	8	80
B1	0.5	3	90	C4	0.5	8	90
B2	0.5	6	90	C5	0.5	8	100
B3	0.5	7	90	C6	0.5	8	110
B4	0.5	8	90	C7	0.5	8	120
B5	0.5	9	90	C8	0.5	8	130