高海拔矿区生物氧化槽内温度场研究
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摘要
高寒矿区生物氧化提金预处理工艺易受气候影响,氧化槽内温度分布不均衡会降低提金率。以高海拔矿区生物氧化槽为计算模型,通过理论推导、实测验证、CFD仿真等方法得到其三维温度场,通过改变换热管排布实现氧化槽内温度均衡分布。结果表明,气候条件对生物氧化槽内温度场分布有沿轴向和径向的影响,轴向影响突出,干扰生物氧化预处理进程。增设换热器能克服温度场不均衡问题,但需采取适当措施进行调整。
Pretreatment process of biological oxidation and gold extraction in alpine-cold mining area is susceptible to climate.Un-balanced temperature distribution in oxidation tank will reduce gold extraction rate.Three-dimensional temperature field is obtained by theoretical derivation,actual measurement and verification,and CFD simulation applying bio-oxidation tank of high-altitude mining area as calculation model.Heat exchange tube arrangement is changed to realize balanced temperature distribution in oxidation tank.The results show that climatic conditions have axial and radial influences on internal temperature field distribution of biological oxidation tank,and the axial influence is prominent,which interferes bio-oxidation pretreatment process.Addition of heat exchangers can overcome imbalance of temperature field,which should be adjusted by appropriate measures.
Pretreatment process of biological oxidation and gold extraction in alpine-cold mining area is susceptible to climate.Un-balanced temperature distribution in oxidation tank will reduce gold extraction rate.Three-dimensional temperature field is obtained by theoretical derivation,actual measurement and verification,and CFD simulation applying bio-oxidation tank of high-altitude mining area as calculation model.Heat exchange tube arrangement is changed to realize balanced temperature distribution in oxidation tank.The results show that climatic conditions have axial and radial influences on internal temperature field distribution of biological oxidation tank,and the axial influence is prominent,which interferes bio-oxidation pretreatment process.Addition of heat exchangers can overcome imbalance of temperature field,which should be adjusted by appropriate measures.
引文
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[3]郑晔.高寒环境下生物氧化提金工艺研究与应用[J].中国矿业,2013,22(6):70-74.
[4]YANG H Y,LIU Q,SONG X L,et al.Research status of carbonaceous matter in carbonaceous gold ores and biooxidation pretreatment[J].Transactions of Nonferrous Metals Society of China,2013,23(11):3405-3411.
[5]刘新星,王国华,谢建平,等.难处理含硫金精矿生物预氧化方法的强化工艺[J].中国有色金属学报,2015,25(8):2218-2225.
[6]孙玉杰,南新元,孙明.基于CFD建模的生物氧化槽空气分散器结构优化研究[J].有色金属(冶炼部分),2018(11):27-31.
[7]梁甜,高丙朋,冯琳欢.生物氧化预处理过程中氧化槽温度机理模型及温度场的研究[J].有色金属(冶炼部分),2017(12):6-10.
[8]杨松荣.含砷难处理金矿石生物氧化提金基础与工程化研究[D].长沙:中南大学,2004.
[9]张振国.新疆塔里木盆地南缘地区近现代气候变化及环境响应研究[D].石家庄:河北师范大学,2016.
[10]QIU X B,WEN J K,HUANG S t,et al.New insights into the extraction of invisible gold in a low-grade high-sulfur Carlin-type gold concentrate by bio-pretreatment[J].Journal of Mineral Metallurgy and Materials:English,2017(24):1111.
[11]XIE Z J,XIA Y,CLINE J S,et al.Comparison of the native antimony-bearing Paiting gold deposit,Guizhou Province,China,with Carlin-type gold deposits,Nevada,USA[J].Mineralium Deposita,2017,52(1):69-84.
[12]丘晓斌,温建康,黄松涛,等.高硫卡林型金精矿中碳质表征及其对生物预氧化提金的影响[J].工程科学学报,2017,39(5):676-682.
[13]王道明,姚兰,邵文彬,等.汽车磁流变液制动器温度特性仿真与试验研究[J/OL].机械工程学报,2019.http://kns.cnki.net/kcms/detail/11.2187.th.20190218.1045.002.html.
[14]孙克国,李思,许炜萍,等.导热系数对寒区隧道温度场时空影响规律研究[J/OL].西南交通大学学报:1-9[2019-03-08].http://kns.cnki.net/kcms/detail/51.1277.U.20181226.1114.008.html.
[15]张静,赵登飞,吴会平.水口结构对连铸GCr15钢二冷区温度场的影响研究[J].铸造技术,2018,39(12):2813-2817.
[16]石峰,邵万珍.基于Workbench的盘式磁力耦合器的温度场分析[J].大连交通大学学报,2019,40(1):58-61.