LIU Lu, WANG Shuzhong, LIU Wei, et al. Zinc Ash Recycling and the System of Supercritical Hydrothermal Synthesis of Nano-Zinc Oxide[J]. 2024, 58(3): 193-203.
DOI:
LIU Lu, WANG Shuzhong, LIU Wei, et al. Zinc Ash Recycling and the System of Supercritical Hydrothermal Synthesis of Nano-Zinc Oxide[J]. 2024, 58(3): 193-203.DOI: 10.7652/xjtuxb202403018.
Zinc Ash Recycling and the System of Supercritical Hydrothermal Synthesis of Nano-Zinc Oxide
a combination of wet recovery process and supercritical hydrothermal synthesis technology is employed to produce high-value nano-zinc oxide products from zinc ash
and an economic analysis of this approach to zinc ash recycling is conducted. A sound system is established using Aspen Plus
and material costs and energy consumption during system operation are analyzed. The leaching rate of zinc in the zinc ash exceeds 95%
under the conditions of sulfuric acid concentration of 2 mol·L
-1
solid-liquid ratio of 1:8
leaching temperature of 50 ℃
leaching time of 2 h
and stirrer speed of 300
r·min
-1
. Fe
Al
Ni
Cu and other impurities are eliminated in the impurity removal process
and the zinc content in the solution after impurity removal reaches 97%. The leaching solution of zinc ash is used to synthesize nano-zinc oxide with an average particle size of 26 nm under supercritical conditions of 400 ℃ and 25 MPa. The resulting zinc oxide exhibits excellent crystallinity and high purity. The comparison with nano-zinc oxide synthesized from pure materials validates the feasibility of this technology
which significantly improves the system's economic viability.
SHE Xuefeng, XUE Qingguo, WANG Jingsong, et al. Comprehensive utilization of zinc-bearing dust and comparison of treatment processes [J]. Ironmaking, 2010, 29(4): 56-62.
ZHU Rongsun, WU Zheng, YI Tingfeng, et al. Study on leaching high Zn-Pb dust from rotary hearth furnace by sulfuric acid solution [J]. Mining and Metallurgical Engineering, 2012, 32(3): 103-106.
SUN Hongyan, SEN Wei, KONG Xin, et al. Leaching of lead and Zinc from Zinc dust using hydrochloric acid [J]. Hydrometallurgy of China, 2014, 33(1): 20-22.
KARLFELDT FEDJE K, ANDERSSON S. Zinc recovery from waste-to-energy fly ash-a pilot test study [J]. Waste Management, 2020, 118: 90-98.
LI Shuo, DAI Jing, LI Li, et al. Determination of zinc oxide and titanium dioxide nanoparticles in imported sunscreen cosmetics [J]. China Surfactant Detergent Cosmetics, 2019, 49(9): 621-626.
LÜ Ying, XIE Jiaying. Research progress on the safety of nano zinc oxide in sunscreen agents [J]. China Cosmetics Review, 2011(5): 62-65.
ADSCHIRI T, KANAZAWA K, ARAI K. Rapid and continuous hydrothermal crystallization of metal oxide particles in supercritical water [J]. Journal of the American Ceramic Society, 1992, 75(4): 1019-1022.
SUE K, MURATA K, KIMURA K, et al. Continuous synthesis of zinc oxide nanoparticles in supercritical water [J]. Green Chemistry, 2003, 5(5): 659-662.
SUE K, KIMURA K, ARAI K. Hydrothermal synthesis of ZnO nanocrystals using microreactor [J]. Materials Letters, 2004, 58(25): 3229-3231.
SUE K, KIMURA K, YAMAMOTO M, et al. Rapid hydrothermal synthesis of ZnO nanorods without organics [J]. Materials Letters, 2004, 58(26): 3350-3352.
VISWANATHAN R, GUPTA R B. Formation of zinc oxide nanoparticles in supercritical water [J]. The Journal of Supercritical Fluids, 2003, 27(2): 187-193.
SØNDERGAARD M, BØJESEN E D, CHRISTENSEN M, et al. Size and morphology dependence of ZnO nanoparticles synthesized by a fast continuous flow hydrothermal method [J]. Crystal Growth Design, 2011, 11(9): 4027-4033.
LEYBROS A, PIOLET R, ARIANE M, et al. CFD simulation of ZnO nanoparticle precipitation in a supercritical water synthesis reactor [J]. The Journal of Supercritical Fluids, 2012, 70: 17-26.
SONG Shaole, SUN Wei, WANG Li, et al. Recovery of cobalt and zinc from the leaching solution of zinc smelting slag [J]. Journal of Environmental Chemical Engineering, 2019, 7(1): 102777.
RUDNIK E. Recovery of zinc from zinc ash by leaching in sulphuric acid and electrowinning [J]. Hydrometallurgy, 2019, 188: 256-263.
王雷. 含锌烟灰回收锌的工艺研究 [J]. 烧结球团, 2020, 45(3): 67-71.
WANG Lei. Research on the technology of zinc recovery from zinc-containing dust [J]. Sintering and Pelletizing, 2020, 45(3): 67-71.
DVORˇÁK P, JANDOVÁ J. Hydrometallurgical recovery of zinc from hot dip galvanizing ash [J]. Hydrometallurgy, 2005, 77(1/2): 29-33.
ZHENG Dongsheng, XIAO Song, LIANG Jie. Study on leaching process of germanium fly ash with sulfuric acid [J]. Yunnan Chemical Technology, 2012, 39(6): 1-5.
JIANG Tao, ZHANG Tao, YE Fengchun, et al. Occurrence state and sulfuric-acid leaching behavior of germanium in secondary zinc oxide [J]. Minerals Engineering, 2019, 137: 334-343.
KURSUNOGLU S, TOP S, KAYA M. Recovery of zinc and lead from Yahyali non-sulphide flotation tailing by sequential acidic and sodium hydroxide leaching in the presence of potassium sodium tartrate [J]. Transactions of Nonferrous Metals Society of China, 2020, 30(12): 3367-3378.
KURSUNOGLU S, KURSUNOGLU N, HUSSAINI S, et al. Selection of an appropriate acid type for the recovery of zinc from a flotation tailing by the analytic hierarchy process [J]. Journal of Cleaner Production, 2021, 283: 124659.
ASADI ZEYDABADI B, MOWLA D, SHARIAT M H, et al. Zinc recovery from blast furnace flue dust [J]. Hydrometallurgy, 1997, 47(1): 113-125.
LUO Wenbo, WANG Jikun, ZHAO Xingfan, et al. Optimization of pressure leaching process of indium-bearing Zinc oxide dust with sulfuric acid [J]. The Chinese Journal of Process Engineering, 2015, 15(6): 982-987.
SHAWABKEH R A. Hydrometallurgical extraction of zinc from Jordanian electric arc furnace dust [J]. Hydrometallurgy, 2010, 104(1): 61-65.