铜渣复合硅锰水淬渣后的改质提铁研究

doi:10.19964/j.issn.1006-4990.2022-0230

Abstract

Abstract:

A large amount of metallurgical slag such as water slag and dry slag has been produced in the production process of copper and other metal materials，its comprehensive utilization level is low，which is becoming the focus and difficulty to be solved urgently for high-quality green development of metallurgical industry.In order to effectively recover Fe from copper slag，industrial copper slag was mixed with silicon-manganese water quenched slag and modified by adding CaO and MnO in a certain proportion.The trend of mineral phases in the mixed slag with temperature was predicted by FactSage，and the changes of mineral phases in the slag before and after modification were compared by XRD，and the morphology，distribution and characteristics of the main mineral phases in the modified mixed slag were characterized by SEM and EDS.The experimental results showed that the mineral phase in the modified mixed slag was dominated by spinel phase and silicate phase.With the increase of alkalinity，the silicate phase in the modified sample was increased but the spinel phase was decreased.The best modification effect was achieved when the alkalinity of the mixed slag was 1.5，and the mass fraction of its iron grade was 44% and the recovery rate was 95%.

Key words: copper slag, silicon manganese water quenching slag, reformation, spinel, silicate

CLC Number:

TQ138.11

ZHENG Bin,JIANG Liang,HAN Fenglan,MA Hongru,QI Zhihong,SU Hui. Study on reformation and extracting iron of copper slag and silicon-manganese water quenched slag composites[J]. Inorganic Chemicals Industry, 2023, 55(1): 136-143.

Figures/Tables 12

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渣料	主要化学成分质量分数
渣料	SiO₂	Al₂O₃	CaO	MnO	MgO	Fe₂O₃	ZnO	CuO	其他
铜渣	14.4	0.00	8.74	0.00	0.00	64.01	2.13	3.77	6.95
硅锰水淬渣	41.33	21.64	16.49	7.32	5.21	0.79	0.00	0.00	7.22

编号	w（铜渣）∶w（硅锰水淬渣）∶ w（CaO）∶w（MnO）	主要化学成分						碱度
编号	w（铜渣）∶w（硅锰水淬渣）∶ w（CaO）∶w（MnO）	w（SiO₂）/%	w（Fe₂O₃）/%	w（Al₂O₃）/%	w（MnO）/%	w（MgO）/%	w（CaO）/%	碱度
S1	48%∶25%∶19%∶8%	19.0	35.0	6.0	10	1.4	28.6	1.5
S2	46%∶24%∶22%∶8%	18.0	34.0	5.8	9.8	1.4	31	1.7
S3	44%∶23%∶25%∶8%	17.7	32.5	5.5	9.4	1.3	33.6	1.9

编号	可能存在的物相	a（O）	a（Si）	a（Al）	a（Ca）	a（Mn）	a（Mg）	a（Fe）
a1	Spinel	54.42	0.00	1.65	1.26	8.33	5.36	28.98
a2	Ca₂Al₂SiO₇	59.82	9.42	8.94	14.99	0.00	0.75	6.07
a3	Ca₂SiO₄	52.04	16.8	0.00	31.05	0.00	0.00	0.00
a4	CaFeSi₂O₆	61.11	6.13	2.26	11.65	1.87	0.00	16.97
b1	Spinel	55.56	0.00	3.16	1.33	7.9	6.35	25.7
b2	Ca₂Al₂SiO₇	60.59	8.86	9.63	15.09	0.00	0.00	5.82
b3	Ca₂SiO₄	62.64	13.17	0.00	23.87	0.00	0.00	0.32
b4	CaFeSi₂O₆	60.12	6.80	1.89	10.58	1.80	1.32	17.42
c1	Spinel	57.92	0.00	2.89	0.98	7.93	8.15	22.14
c2	Ca₂Al₂SiO₇	61.29	8.14	11.07	14.4	0.00	0.23	4.86
c3	Ca₂SiO₄	66.57	11.54	0.00	21.5	0.13	0.00	0.26
c4	CaFeSi₂O₆	61.31	7.85	4.76	13.01	1.34	0.42	11.31
c5	Ca₂Fe₂O₅	57.69	0.00	0.73	11.83	4.46	0.00	25.28

编号	碱度	黏度/（Pa·s）
编号	碱度	1 000 ℃	1 100 ℃	1 200 ℃	1 300 ℃	1 400 ℃
S1	1.5	0.851	0.398	0.207	0.118	0.071
S2	1.7	0.859	0.400	0.207	0.117	0.071
S3	1.9	0.867	0.402	0.208	0.117	0.07

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Study on reformation and extracting iron of copper slag and silicon-manganese water quenched slag composites

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