氰化尾渣制备烧结陶瓷
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摘要
以探究氰化尾渣制备烧结陶瓷的可行性为目的,研究了氰化尾渣的化学组成、工艺性能、烧成性能。结果表明:氰化尾渣主要含石英、长石、硫铁矿,其化学成分与陶瓷坯料成分相近,且细度细、流动性好、生坯干燥收缩率小、干燥敏感系数小、干坯强度高。在1120℃保温15min的烧成条件下,烧制的陶瓷吸水率低至1.00%、抗折强度高达56.7MPa,且高温过程中,氰化物被分解,重金属被烧结固化。利用氰化尾渣烧制陶瓷,有望实现氰化尾渣的无害化、资源化利用。
The cyanide tailing mainly consists of quartz, feldspar, and pyrites, in which the chemical composition is similar to ceramic billet. The cyanide tailing demonstrates some superior properties in fineness, flowability of slurry, drying shrinkage, coefficient of drying sensitivity and strength of green body after drying. In this paper, a ceramic product with water absorption of 1.00%(in mass fraction) and rupture strength of 56.7MPa was obtained after sintering. The results reveal that the cyanide is completely decomposed and most of heavy mental ions are immobilized. It is indicated that the utilization of cyanide tailing in ceramic manufacturing could contribute to the safety and resource utilization of cyanide tailing.
The cyanide tailing mainly consists of quartz, feldspar, and pyrites, in which the chemical composition is similar to ceramic billet. The cyanide tailing demonstrates some superior properties in fineness, flowability of slurry, drying shrinkage, coefficient of drying sensitivity and strength of green body after drying. In this paper, a ceramic product with water absorption of 1.00%(in mass fraction) and rupture strength of 56.7MPa was obtained after sintering. The results reveal that the cyanide is completely decomposed and most of heavy mental ions are immobilized. It is indicated that the utilization of cyanide tailing in ceramic manufacturing could contribute to the safety and resource utilization of cyanide tailing.
引文
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[3]ZHANG Y,LI H,YU X.Fe extraction from high-silicon and aluminum cyanide tailings by pretreatment of water leaching before magnetic separation[J].Trans Nonferr Metals Soc China,2013,23(4):1165-1173.
[4]YANG G,TSAI C M.A study on heavy metal extractability andsubsequent recovery by electrolysis for a municipal incinerator fly ash[J].J Hazard Mater,1998,58:103-120.
[5]EDINGER E N,AZMY K,DIEGOR W,et al.Heavy metal contamination from gold mining recorded in Porites lobata skeletons,Buyat-Ratototok district,North Sulawesi,Indonesia[J].Marer Pollut Bull,2008,56(9):1553-1569.
[6]薛光,李先恩.从焙烧氰化尾渣中回收金、银的试验研究[J].黄金,2012(8):41-42.XUE Guang,LI Xianen.Gold(in Chinese),2012(8):41-42.
[7]闫军宁.我国金矿氰化渣中金再回收利用研究现状[C]//第六届中国矿业科技大会,中国成都,2015:8-10.YAN Junning.The research status on gold reuse of gold deposit in China gold mine[C]//The 6~(th)China Mining Technology Conference,Chengdu,China,2015:8-10.
[8]李礼,谢超,陈冬梅,等,金尾矿综合利用技术研究与应用进展[J].能源环境保护,2012,26(3):1-4.LI Li,XIE Chao,CHEN Dongmei et al.J Energy Environ Prot(in Chinese),2012,26(3):1-4.
[9]李勇.氰化尾渣氯化离析—浮选工艺研究[D].长沙:中南大学,2013.LI Yong.Research on chloridizing segregation-flotation technology for cyanide tailings(in Chinese,dissertation).Changsha:Central South University,2013.
[10]贺宗武.日用瓷坯料烧结温度和釉料熔融温度[J].中国陶瓷,1992(2):33-38.HE Zongwu.China Ceram(in Chinese),1992(2):33-38.
[11]蒲诚,蹇守卫,莫志胜,等.温度制度对页岩烧结砖性能影响研究[J].砖瓦,2015(8):10-16.PU Cheng,QIAN Shouwei,MO Zhisheng et al.Block-Brick-Tile(in Chinese),2015(8):10-16.
[12]马保国,陈方颉,蹇守卫,等.烧结制度对膨润土页岩烧结砖性能的影响[J].砖瓦,2014(4):3-7.MA Baoguo,CHEN Fangjie,JIAN Shouwei et al.Block-Brick-Tile(in Chinese),2014(4):3-7.
[13]赵建夫,汪云琇.废水中氰化物氧化水解反应研究[J].环境科学,1989(6):2-5.ZHAO Jianfu,WANG Yunxiu.Environ Sci(in Chinese),1989(6):2-5.
[14]陈伟,钱觉时,刘军,等.污水污泥页岩烧结制品的重金属固化与水环境浸出稳定性[J].硅酸盐学报,2012,40(10):1420-1426.CHEN Wei,QIAN Jueshi,LIU Jun,et al.J Chin Ceram Soc,2012,40(10):1420-1426.