减压反应蒸馏去除热镀锌FeCl2污泥中的Cl-

doi:10.11962/1006-4990.2019-0517

Abstract

Abstract:

Cl^- has been high chlorine toxicity to growth of the plants,and the content of Cl^- in hot-dip galvanized FeCl₂ sludge is very high,so it can not be directly disposed as general waste.In this experiment,Cl^- in FeCl₂ solution was removed by vacuum reactive distillation.At the same time,HCl gas was formed by hydrolysis of FeCl₂ and taken out by vacuum distillation,the Fe（OH）₂ was oxidized to Fe（OH）₃ by air during aeration.And then ferric oxide hydrate（Fe₂O₃·nH₂O） was obtained by filtering and drying.The removal of Cl^- from FeCl₂ solution was designed as 3 factors and 4 levels to carry out orthogonal tests,and the single factor tests were studied.The optimum technological conditions for removal of Cl^- from FeCl₂ solution by vacuum reactive distillation were as follows：FeCl₂ concentration was 1.50 mol/L,heating temperature was 75 ℃,reactive distillation time was 120 min and vacuum degree was 0.06 MPa.Under the conditions,the removal efficiency of Cl^- was up to 85.5%.When the optimum technological conditions were applied to removal of Cl^- from hot-dip galvanized FeCl₂ sludge,the removal efficiency of Cl^- reached 84.0%.

Key words: hot-dip galvanized FeCl₂ sludge, removal efficiency of Cl^-, vacuum reactive distillation, ferric oxide hydrate

CLC Number:

TQ138.11

Huang Donglin,Li Guoqing. Removal of Cl^- from hot-dip galvanized FeCl₂ sludge by vacuum reactive distillation[J]. Inorganic Chemicals Industry, 2020, 52(8): 72-75.

Figures/Tables 10

References 8

[1]	彭健, 朱印, 张登峰. 盐酸酸洗废液制备聚氯化铁[J]. 无机盐工业, 2019,51(7):81-84.
[2]	张立方. 热镀锌工艺废酸治理方法的探讨[J].河北冶金, 2014(11):80-82.
[3]	谢晓翠 .胡仰栋, 张伟涛, 等. 氯化亚铁生产高品质氧化铁红的工艺研究[J]. 无机盐工业, 2015,47(5):41-44.
[4]	李华. 氯化亚铁废酸液回收利用工艺研究[D]. 山东:中国海洋大学, 2015.
[5]	Carrillo A J, Garcia G M, Perez H V. Treatment of spent pickling baths coming from hot dip galvanizing by means of an electrochemical membrane reactor[J]. Desalination, 2014,343:38-47.
[6]	Becze L, Hock S J, Demopoulos G P. Precipitation of hematite and recovery of hydrochloric acid from concentrated iron chloride solutions by a novel hydrolytic decomposition process∥EPD congress[M]. Berlin:Springer, 2011,1:529-538.
[7]	罗望. 镀锌废水处理工程实践[J]. 中国资源综合利用, 2014,32(12):26-27.
[8]	Fadeeva I V, Selezneva I I, Davydova G A, et al. Iron-substituted tricalcium phosphate ceramics[J]. Doklady Chemistry, 2016,468(1):159-161.

序号	因素			Cl^-去除率 η/%
序号	A c（FeCl₂）/（mol·L^-1）	B 加热温度/℃	C 反应蒸馏时间/min	Cl^-去除率 η/%
1	1.0	70	60	62.6
2	2.0	60	80	26.2
3	1.5	70	80	59.0
4	2.0	80	60	60.7
5	1.0	75	80	69.9
6	2.0	75	100	53.6
7	0.5	75	120	77.0
8	1.5	80	100	63.5
9	1.0	60	100	63.6
10	0.5	80	80	63.7
11	1.5	60	120	70.9
12	0.5	60	60	43.4
13	1.0	80	120	31.3
14	0.5	70	100	43.4
15	1.5	75	60	48.1
16	2.0	70	120	66.9

水平	c（FeCl₂）/（mol·L^-1）	加热温度/℃	反应蒸馏时间/min
1	56.9	51.0	53.7
2	56.9	57.0	54.7
3	60.4	62.1	56.0
4	51.9	54.8	61.5
极差	8.5	11.1	7.8

[1]	LI Kuai, LI Zhaoshuai, DONG Tingxuan, LI Dan, GUO Shengwei, HAN Fenglan. Study on effect of wet magnetic separation on distribution of Fe and heavy metal in fly ash [J]. Inorganic Chemicals Industry, 2024, 56(4): 98-104.
[2]	XU Li, ZHANG Qiang. Experimental study on properties of iron tailings powder cement-based materials [J]. Inorganic Chemicals Industry, 2023, 55(6): 116-123.
[3]	LIU Rui, GAO Wei, ZHANG Wenjing, AN Hongxue, LI Zaixing. Catalytic degradation of Rhodamine B by ferroferric oxide-loaded bacterial residue biochar [J]. Inorganic Chemicals Industry, 2023, 55(4): 111-119.
[4]	HU Luoxing,HUANG Qimao,QU Hongyou. Preparation of Fe₃O₄ from FeCl₂ by-product of new process of titanium dioxide by hydrochloric acid [J]. Inorganic Chemicals Industry, 2023, 55(1): 118-123.
[5]	JIA Zhiqi,NIE Huimin,ZHAO Yongxiang. Fe⁰/C induced copper salt reduction coupled with chemical precipitation method to remove thiocyanate from wastewater [J]. Inorganic Chemicals Industry, 2023, 55(1): 129-135.
[6]	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.
[7]	ZHU Wanye,TANG Ding,CHI Heting,LIAO Xianghui,ZHUANG Rongchuan,WANG Qiankun,SHEN Qingfeng. Study on impurity removal rule of ferrous sulfate from by-product of titanium dioxide by crystallization purification [J]. Inorganic Chemicals Industry, 2022, 54(7): 105-109.
[8]	LU Zheng,CHEN Kunfeng,XUE Dongfeng. Study on large-scale preparation and electrochemical properties of high thermal stabilized α-Fe₂O₃ [J]. Inorganic Chemicals Industry, 2022, 54(3): 45-50.
[9]	WANG Xiaohuan,LI Shenghao,SHI Zhiming,WANG Jun,XINBA Yaer,LIU Liang. Research status of FeTiO₃ materials [J]. Inorganic Chemicals Industry, 2022, 54(1): 12-17.
[10]	SONG Jin,WU Fenglong,WANG Yuejun. Study on preparation of Fe/modified MCM-41 catalyst with different loading methods and degradation of methylene blue [J]. Inorganic Chemicals Industry, 2021, 53(11): 122-128.
[11]	WANG Huijuan,WANG Chunyu,ZHANG Qiong. Research progress on the preparation of two-dimensional layered nanosheet materials and its application in electrolyzed water [J]. Inorganic Chemicals Industry, 2021, 53(11): 25-29.
[12]	Wang Lixia,Ren Dongmei,Wang Qiong,Chang Chun. Stduy on preparation of magnetic metal-organic frame materials and their adsorption properties [J]. Inorganic Chemicals Industry, 2021, 53(9): 46-50.
[13]	Liu maoju,Gong Fuzhong,Tie Yunfei,Li Yanlin. Study on reverse osmosis membrane process with zero-discharge for treating of wastewater from iron phosphate production [J]. Inorganic Chemicals Industry, 2021, 53(8): 101-105.
[14]	Ji Dingyu,Li Yunzhen,Zhou Yu. Preparation of polymeric ferric sulfate from iron tailings and preliminary evaluation of papermaking wastewater treatment [J]. Inorganic Chemicals Industry, 2021, 53(8): 96-100.
[15]	Sun Genxing,Zhang Fan,Ma Qi,Han Xiaohui. Some problems in the design and operation of the production unit of iron brine solution treatment agent [J]. Inorganic Chemicals Industry, 2021, 53(7): 80-82.

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Removal of Cl^- from hot-dip galvanized FeCl₂ sludge by vacuum reactive distillation

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 10

References 8

Related Articles 15

Metrics

Comments

Recommended 0

Removal of Cl- from hot-dip galvanized FeCl2 sludge by vacuum reactive distillation