阳极炭渣催化脱碳制备冰晶石工艺研究

doi:10.19964/j.issn.1006-4990.2023-0292

Abstract

Abstract:

Aluminum anode carbon slag is a hazardous waste，but also a high-value of fluorine resources，the content of cryolite is about 70%，which has greater recycling value.In order to achieve the resource utilization and value-added utilization of anode carbon slag，the one-step roasting decarbonization process for recovering cryolite was explored.The effects of calcination temperature，holding time，and reagent ratio on the decarburization rate of anode carbon slag were investigated by adding reaction additives for catalytic calcination.The obtained optimal experimental conditions were calcination temperature of 760 ℃，holding time of 2.5 h，addition of reaction additives of 5%（mass fraction），and a decarbonization rate of 97.75% under these conditions.Differential thermal analysis was conducted on the carbon slag with reaction additive of 5% and the combustion law of anode carbon slag catalyzed by adding reaction additives was obtained.As the temperature increasing，the decomposition of crystalline water，combustion of reaction additives，combustion of carbon in carbon slag，and volatilization of electrolytes occured successively.There was no obvious carbon residue in the obtained product，and the main component was cryolite.No new impurities were introduced during the catalytic roasting process.The iron and silicon impurities in the recovered cryolite were low in content and of high quality，and could be directly returned to the electrolytic cell for recycling.

Key words: aluminum electrolysis, anode carbon slag, roasting, catalytic decarbonization, cryolite

CLC Number:

TQ133.1

ZHANG Yaqi, CHEN Xiping, SUN Ningning. Study on preparation process of cryolite from anode carbon slag by catalytic decarburization[J]. Inorganic Chemicals Industry, 2024, 56(3): 91-97.

Figures/Tables 13

Table 1

Fig.1

Fig.2

Fig.3

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

Table 2

References 21

1	GRJOTHEM K， WELCH B J.Aluminium smelter technology［M］.Dusseldorf：Aluminium-Verlag，1980.
2	邱竹贤.预焙槽炼铝［M］.3版.北京：冶金工业出版社，2005.
3	郭志华.铝电解生产过程中碳渣产生的根源及应对措施［J］.低碳世界，2020，10（5）：16-17.
	GUO Zhihua.Causes and countermeasures of carbon slag in aluminum electrolysis production［J］.Low Carbon World，2020，10（5）：16-17.
4	赖延清，刘业翔.电解铝炭素阳极消耗研究评述［J］.轻金属，2002（8）：3-7，10.
	LAI Yanqing， LIU Yexiang.Research review of carbon anode consumption in aluminum electrolysis［J］.Light Metals，2002（8）：3-7，10.
5	王平甫，刘凤琴，童春秋，等.铝电解槽炭阳极氧化掉渣裂纹掉块的危害和影响因素［J］.轻金属，2002（3）：42-45.
	WANG Pingfu， LIU Fengqin， TONG Chunqiu，et al.Harm and influencing factors of slag，crack and lump falling from carbon anode oxidation in aluminum reduction cell［J］.Light Metals， 2002（3）：42-45.
6	刘宣伟，李登辉.电解槽内炭渣对铝电解生产过程的影响［J］.冶金管理，2021（3）：24-25.
	LIU Xuanwei， LI Denghui.Effect of carbon residue in electrolytic cell on aluminum electrolysis production process［J］.China Steel Focus，2021（3）：24-25.
7	白琼.铝电解生产过程中碳渣产生的根源及应对措施［J］.冶金管理，2020（17）：158-159.
	BAI Qiong.Causes and countermeasures of carbon slag in aluminum electrolysis production［J］.China Steel Focus，2020（17）：158-159.
8	刘永强，姬凤武.铝电解生产中炭渣的危害分析与控制［J］.世界有色金属，2013（12）：30-32.
	LIU Yongqiang， JI Fengwu.Hazard analysis and control of carbon slag in aluminum electrolysis production［J］.World Nonferrous Metals，2013（12）：30-32.
9	赵东方，杨玉卓.探析铝电解生产中碳渣的危害性［J］.科技创新导报，2013，10（10）：154.
	ZHAO Dongfang， YANG Yuzhuo.Analysis on the harmfulness of carbon slag in aluminum electrolysis production［J］.Science and Technology Innovation Herald，2013，10（10）：154.
10	刘海锋，张彦荣，文钧德，等.铝电解阳极炭渣综合利用研究进展［J］.甘肃冶金，2023，45（1）：90-93.
	LIU Haifeng， ZHANG Yanrong， WEN Junde，et al.Research progress on comprehensive utilization of anode carbon residue in aluminum electrolysis［J］.Gansu Metallurgy，2023，45（1）：90- 93.
11	梅向阳，李俊，于站良.浮选法回收利用碳渣实验研究［J］.轻金属，2016（4）：28-30，62.
	MEI Xiangyang， LI Jun， YU Zhanliang.The research on recycling carbon residue by Floatation process［J］.Light Metals，2016（4）：28-30，62.
12	周军，姚桢，刘卫，等.浮选工艺条件对铝电解炭渣中炭质材料分离效果的影响［J］.炭素技术，2019，38（5）：58-61.
	ZHOU Jun， YAO Zhen， LIU Wei，et al.Effects of flotation conditions on the separation efficiency of carbon in carbon residue in aluminum electrolysis［J］.Carbon Techniques，2019，38（5）：58-61.
13	LI Hesong， WANG Jiaoru， HOU Wenyuan，et al.The study of carbon recovery from electrolysis aluminum carbon dust by froth flotation［J］.Metals，2021，11（1）：145.
14	XING Yaowen， GUI Xiahui， CAO Yijun，et al.Clean low-rank-coal purification technique combining cyclonic-static microbubble flotation column with collector emulsification［J］.Journal of Cleaner Production，2017，153：657-672.
15	马利凤，李仕亮，张海亮.回收利用某电解铝炭渣的浮选工艺［J］.现代矿业，2019，35（11）：33-34，43.
	MA Lifeng， LI Shiliang， ZHANG Hailiang.Flotation process of recycling carbon slag from electrolytic aluminium［J］.Modern Mining，2019，35（11）：33-34，43.
16	廖辉，李龙江，卯松.阳极炭渣中炭组分浮选回收试验研究［J］.化工矿物与加工，2022，51（4）：56-60.
	LIAO Hui， LI Longjiang， MAO Song.Flotation tests for recovery of carbon component from anode carbon slag［J］.Industrial Minerals & Processing，2022，51（4）：56-60.
17	陈喜平，赵淋，罗钟生.回收铝电解炭渣中电解质的研究［J］.轻金属，2009（12）：21-25，37.
	CHEN Xiping， ZHAO Lin， LUO Zhongsheng.Study on recycling process for electrolyte in carbon dust from reduction cells［J］.Light Metals，2009（12）：21-25，37.
18	周峻宇，伍成波，张江斌，等.电解铝炭渣的特性及流化床回收研究［J］.有色金属（冶炼部分），2014（12）：16-18，40.
	ZHOU Junyu， WU Chengbo， ZHANG Jiangbin，et al.Study of characteristic of carbon residue from electrolytic aluminum and its fluidization recovery［J］.Nonferrous Metals（Extractive Metallurgy），2014（12）：16-18，40.
19	唐剑，陈湘清，王波，等.电解铝碳渣低温火法处理技术研究及应用［J］.世界有色金属，2021（16）：134-137.
	TANG Jian， CHEN Xiangqing， WANG Bo，et al.Research and application of low temperature fire treatment technology for electrolytic aluminum carbon slag［J］.World Nonferrous Metals， 2021（16）：134-137.
20	康泽双，李帅，练以诚，等.采用低温循环焙烧工艺从碳渣中回收电解质试验［J］.中国有色冶金，2022，51（2）：19-23.
	KANG Zeshuang， LI Shuai， LIAN Yicheng，et al.Recovering electrolyte from carbon dross with low temperature circulating roasting process［J］.China Nonferrous Metallurgy，2022，51（2）：19-23.
21	华一新.冶金过程动力学［M］.北京：冶金工业出版社，2004.

原料组分质量分数/%
C	F	Na	Al	K	Mg	Ca	Fe	Si	其他
28.83	37.22	18.08	10.96	1.79	0.13	1.81	0.08	0.07	0.95
产品组分质量分数/%
F	Na	Al	K	Mg	Ca	Fe	Si	其他
52.3	25.4	15.4	2.52	0.19	2.55	0.12	0.10	1.33

[1]	SHI Yunpeng, GUO Ze, ZHANG Hanquan, LU Manman. Study on treatment of ammonia nitrogen wastewater by roasted phosphorus tailings [J]. Inorganic Chemicals Industry, 2025, 57(3): 94-100.
[2]	MAO Shize. Study on microwave roasting-activated coal gangue to improve sulfate corrosion resistance of concrete [J]. Inorganic Chemicals Industry, 2025, 57(3): 86-93.
[3]	ZENG Yijun, JIANG Ziwen, JIAN Chengzong, QUAN Xuejun. Study on deep extraction of chromium from calcium-free roasting slag of chromite ore [J]. Inorganic Chemicals Industry, 2025, 57(1): 90-96.
[4]	WANG Benlei, ZHANG Guisheng, JIANG Lingyun, LI Chen, WANG Pengfei, LI Jixia, ZANG Jiazhong. Study on preparation process of rhodium trichloride by roasting recovery technology from waste rhodium solution of carbonyl synthesis [J]. Inorganic Chemicals Industry, 2023, 55(6): 104-108.
[5]	CHEN Yujue, ZHANG Liangjun, KUANG Huan, JIANG Manwen, XIAO Li. Study on roasting and recovery process of waste lithium iron phosphate powder with sodium bisulfate [J]. Inorganic Chemicals Industry, 2023, 55(3): 113-117.
[6]	GUO Ze, ZHANG Pengfei, YANG Fan, ZHANG Hanquan, LU Manman. Preparation of β-hemihydrate gypsum by phosphogypsum roasting [J]. Inorganic Chemicals Industry, 2023, 55(10): 106-113.
[7]	DING Yong,FENG Xiaorui,LU Xiangjie,GAO Xiaoqin,FENG Yan,HE Yan. Study on preparation of high purity micron nickel oxide powder by roasting carbonyl nickel powder [J]. Inorganic Chemicals Industry, 2022, 54(4): 119-122.
[8]	ZENG Yanjie,XU Tongfei,HUANG Ziliang,CHEN Zhipeng,LIU Xudong,YI Meigui. Study on removal of calcium impurities from magnesium waste residue by roasting-hydration complexing [J]. Inorganic Chemicals Industry, 2022, 54(11): 118-123.
[9]	Sun Shuangshuang,Zhong Jianchu,Wang Hongzhi. Study on desiliconization process of copper smelting slag [J]. Inorganic Chemicals Industry, 2021, 53(9): 83-87.
[10]	Yan Zhenzong,Wang Dong. Study on rotary kiln reduction roasting production process of barite in Tianzhu of Guizhou [J]. Inorganic Chemicals Industry, 2021, 53(4): 73-75.
[11]	Shang Fangyu,Su Xuetong,Shang Suying. Study on recovery of barium from barium slag by chlorination roasting-water leaching process [J]. Inorganic Chemicals Industry, 2021, 53(3): 65-67.
[12]	Qing Penghui,Dong Yuming,Wang Xingrun,Zhu Kaisheng,Niu Renjie,Meng Jingjuan,Chen Xiaohong,Chen Huixia,Zhang Hongling,Xu Hongbin. Chromium extraction and detoxification of processing residue from lime-free roasting process of chromite ore [J]. Inorganic Chemicals Industry, 2020, 52(6): 63-67.
[13]	Li Shuai,Liu Wanchao,Yang Gang,Kang Zeshuang,Liu Zhongkai. Present situation of treatment technology of spent pot lining of aluminum electrolysis [J]. Inorganic Chemicals Industry, 2020, 52(5): 6-10.
[14]	Du Xiaowang,Zhong Jianchu,Wang Xiaotian. Study on removal of silicon from high-silicon brucite by sodium roasting method [J]. Inorganic Chemicals Industry, 2020, 52(10): 92-95.
[15]	Jiang Ke,Zhou Kanggen. Synthesis of big-size cryolite from fluorine-containing wastewater by crystallization process [J]. Inorganic Chemicals Industry, 2019, 51(6): 53-56.

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on preparation process of cryolite from anode carbon slag by catalytic decarburization

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 13

References 21

Related Articles 15

Metrics

Comments

Recommended 0