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国家自然科学基金(5114703)

作品数:3 被引量:18H指数:2
相关作者:彭金辉张利波顾晓春刘秉国夏洪应更多>>
相关机构:昆明理工大学云南铜业股份有限公司更多>>
发文基金:国家自然科学基金云南省中青年学术和技术带头人后备人才项目更多>>
相关领域:矿业工程冶金工程环境科学与工程化学工程更多>>

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Effect of temperature on dielectric property and microwave heating behavior of low grade Panzhihua ilmenite ore被引量:10
2013年
The permittivity of low grade Panzhuhua ilmenite ore at 2.45 GHz in the temperatures from 20 ℃ up to 100 ℃ was measured using the technology of open-ended coaxial sensor combined with theoretical computation. The results show that both the real (ε′) and imaginary (ε′) part of complex permittivity (ε′-jε′) of the ilmenite significantly increase with temperature. The loss tangent (tanδ) is a quadratic function of temperature, and the penetration depth of ilmenite decreases with temperature increase from 20 ℃to 100 ℃ The increase of the sample temperature under microwave radiation displays a nonlinear relationship between the temperature (T) and microwave heating time (t). The positive feedback interaction between complex permittivity and sample temperature amplifies the interaction between ilmenite and the microwave radiation. The optimum dimensions for uniform heat deposition vary from 10 cm to 5 cm (about two power penetration depths) in a sample being irradiated from both sides in a 2.45 GHz microwave field when temperature increases from room temperature to 100 ℃
刘晨辉张利波彭金辉刘秉国夏洪应顾晓春史谊峰
微波干燥白钨精矿响应曲面法优化工艺研究被引量:7
2012年
开展了白钨精矿的微波干燥新工艺研究,考察了微波干燥温度、干燥时间以及物料质量三因素对相对脱水率的影响。在条件试验的基础上以白钨精矿相对脱水率为响应值,采用响应曲面组合设计对工艺参数进行优化。所得优化工艺条件为:物料温度92℃,微波干燥时间174 s,物料质量135 g,白钨精矿的相对脱水率达到82.4%,验证试验实际值与预测值比较接近,可靠性较高。优化试验结果表明,与常规电加热干燥相比,微波干燥时间缩短了97.5%,基于响应曲面法的优化设计对工艺参数具有较好的优化和预测,微波干燥白钨精矿新工艺合理可行,对矿物的微波干燥工艺推广具有一定的参考价值。
郭磊张利波彭金辉段昕辉王欣
关键词:白钨精矿微波响应曲面法
Process optimization for treatment of methyltin mercaptide effluents using modified semi-coke被引量:1
2013年
The central composite process optimization was performed by response surface methodology technique using a design for the treatment of methyltin mercaptide with modified semi-coke. The semi-coke from the coal industry was suitably modified by treating it with phosphoric acid, with a thermal activation process. The objective of the process optimization is to reduce the chemical oxygen demand (COD) and NH4+-N in the methyltin mercaptide industrial effluent. The process variables considered for process optimization are the semi-coke dosage, adsorption time and effluent pH. The optimized process conditions are identified to be a semi-coke dosage of 80 g/L, adsorption time of 90 min and a pH value of 8.34. The ANOVA results indicate that the adsorbent dosage and pH are the significant parameters, while the adsorption time is insignificant, possibly owing to the large range of adsorption time chosen. The textural characteristics of modified semi-coke were analyzed using scanning electron microscopy and nitrogen adsorption isotherm. The average BET surface area of modified semi-coke is estimated to be 915 mE/g, with the average pore volume of 0.71 cm3/g and a average pore diameter of 3.09 nm, with micropore volume contributing to 52.36%.
王欣C.Srinivasakannan曲雯雯彭金辉张利波段昕辉卢帅丹
关键词:SEMI-COKE
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