精炼镁渣的性能分析及应用

doi:10.19964/j.issn.1006-4990.2020-0425

Abstract

Abstract:

Magnesium slag is a solid waste discharged during the production process of magnesium extraction and smelting.However,there are few systematic research reports on the refining of magnesium slag.In order to explore the physical and chemical properties of refined magnesium slag,the refined magnesium slag produced in a refining magnesium plant in Shanxi was used as raw material,and the physical and chemical properties were studied using high-temperature box furnace,X-ray fluorescence spectrometer（XRF）,X-ray diffractometer（XRD）,and scanning electron microscope-energy dispersive spec-trometer（SEM-EDS）.The results showed that the main component of refined magnesium slag was MgCl₂·6H₂O,and the re-covery of magnesium chloride was a more feasible solution.The presence of magnesium nitride（Mg₃N₂） in the refined magne-sium slag indicated that the excessively high melting temperature during the melting of crude magnesium caused the refined elemental magnesium to react with nitrogen.The density adjustment of the refining flux would also directly affect the ease of separation of the magnesium beads in the refined magnesium slag.The crushing and winnowing of the magnesium slag could effectively separate the useless impurities,and would better expose the magnesium beads wrapped in the refined magnesium slag,which was beneficial to the recovery of resources.Finally,the current utilization of refined magnesium slag in China was discussed,and it was concluded that refined magnesium slag had good prospect of high-value utilization and could realize the reuse of waste resources.

Key words: refined magnesium slag, crushing and winnowing, magnesium beads

CLC Number:

TQ132.2

Ren Lei,Ma Yuliang,Jia Yangjie,Wang Xingjun,Yang Fengling,Cheng Fangqin. Performance analysis and application of refined magnesium slag[J]. Inorganic Chemicals Industry, 2021, 53(6): 164-170.

Figures/Tables 9

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References 26

[1]	冯硕, 崔丽, 程芳琴. 金属镁渣的综合利用[J]. 科技情报开发与经济, 2011,21(35):162-163.
[2]	李咏玲, 戈甜, 程芳琴. 不同处理方式对镁渣理化特性的影响[J]. 无机盐工业, 2016,48(3):52-55.
[3]	郭世平, 高波, 郭静静, 等. 镁渣余热在粗镁精炼中的应用研究[J]. 轻金属, 2017(10):41-43.
[4]	刘锦辉, 林文彪. 铝合金的除镁精炼工艺[J]. 铸造技术, 1991(5):5-7.
[5]	段丽萍, 寇斌达, 姬克丹, 等. 镁渣应用于循环流化床锅炉脱硫的试验[J]. 热力发电, 2016,45(1):88-92.
[6]	马双忱, 别璇, 孙尧, 等. 燃煤电厂镁法脱除烟气中SO₂的研究现状与展望[J]. 化工进展, 2018,37(9):3609-3617.
[7]	任玉生, 徐宁. 钙镁渣湿法烟气脱硫工艺的研究[J]. 科技情报开发与经济, 2007,17(21):171-172.
[8]	冯雅丽, 廖圣德, 李浩然, 等. 镁法脱硫及脱硫产物多元化利用研究现状[J]. 无机盐工业, 2019,51(3):1-6.
[9]	张文政, 刘正, 毛萍莉. 镁金属提炼和精炼工艺的研究进展[J]. 机械工程材料, 2013,37(11):12-16.
[10]	Ong S K, Koh T H, Nee A Y C. Assessing the environmental impact of materials processing techniques using an analytical hierarchy process method[J]. Journal of Materials Processing Technology, 2001,113(1):424-431. doi: 10.1016/S0924-0136(01)00618-5
[11]	Gao H T, Wu G H, Ding W J. Purifying effect of new flux on magne-sium alloy[J]. Transactions of Nonferrous Metals Society of China, 2004,14(3):530-536.
[12]	Gao H T, Wu G H, Fan Y, et al. Effects of purification fluxes conta-ining boride on AZ91 alloy[J]. Materials Science Forum, 2005,488-489:25-30. doi: 10.4028/www.scientific.net/MSF.488-489
[13]	Schwerdtfeger K, Mutale C T, Ditze A. Recycling of magnesium allys:Chemical equilibrium between magnesium-lithium based me-lts[J]. Metallurgical and Materials Transactions A, 2002,33B:355-362.
[14]	路八智, 李燕梅, 魏占鸿, 等. 氧化镁法烟气脱硫特性及运行情况综述[J]. 环境污染与防治, 2018,40(3):345-348.
[15]	朱丹青. 浅谈硅热法镁精炼工艺与设计[J]. 轻金属, 1996(5):42-48.
[16]	崔自治, 杨维武, 张冬平. 镁渣火山灰活性试验研究[J]. 宁夏工程技术, 2007,6(2):160-163.
[17]	Kimura K, Nishii K, Kawarada M. Recycling magnesium alloy hou-sings for notebook computers[J]. Fujitsu Scientific and Technical Journal, 2002,28(1):102-111.
[18]	Antrekowitsch H, Hanko G. Recycling of different types of magne-sium scrap[C]//Magnesium Technology 2002,Warrendale,PA:The Minerals,Metals & Materials Society, 2002:43-48.
[19]	陈萍, 张茂勋. 镁及镁合金燃点的测试[J]. 特种铸造及有色合金, 2001(2):75-76.
[20]	陈萍. 镁合金燃点的测试研究[D]. 福州:福州大学, 2002.
[21]	徐日瑶, 刘宏专. 用新熔剂精炼碎结晶镁或回收精炼渣中镁的方法[J]. 轻金属, 1997(6):46-50.
[22]	李晓波. 精炼镁渣制光卤石和硫酸镁工艺研究[J]. 无机盐工业, 2003,35(3):42-43,51.
[23]	司徒杰生. 无机化工产品[M]. 北京: 化学工业出版社, 1993.
[24]	李晓波. 精炼镁渣制光卤石和氯化镁工艺研究[J]. 海湖盐与化工, 2006,35(1):16-18.
[25]	杨志刚. 从精炼镁渣中制取低钠光卤石、氯化钠、氯化镁的方法:中国, 102424916A[P]. 2012-04-25.
[26]	谭何易, 唐伦圆. 一种精炼镁渣的环保处理方法:中国, 107075611B[P]. 2014-04-14.

镁渣粒径/ mm	各元素质量分数/%
镁渣粒径/ mm	Mg	Al	Si	P	S	Cl	K	Ca	Fe
镁渣原块	33.406	1.050	0.000	0.179	0.085	57.886	0.415	6.431	0.203
>3.55	32.987	1.159	0.000	0.136	0.093	56.336	1.720	6.935	0.260
2.00~3.55	32.131	1.038	0.000	0.132	0.106	58.499	1.313	6.239	0.195
0.85~2.00	30.915	1.116	0.000	0.145	0.057	59.049	1.431	6.741	0.228
0.43~0.85	33.371	1.133	0.000	0.129	0.036	57.162	1.268	6.399	0.205
0.25~0.43	31.718	1.032	0.563	0.139	0.066	57.838	1.256	6.823	0.244
0.18~0.25	32.318	1.059	1.692	0.189	0.119	51.892	1.287	10.713	0.356
<0.18	31.129	1.034	2.749	0.165	0.124	49.970	1.257	12.674	0.560

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Performance analysis and application of refined magnesium slag

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