应用响应面设计分析法研究碳酸锰吸收微波的性能

以碳酸锰为微波吸收材料,考察了微波输出功率、微波辐射时间、样品堆积厚度和样品质量等因素对微波吸收率的影响。基于单因素条件影响试验结果,采用响应面法进行试验设计、方差分析、曲面分析及模型优化。结果表明,各因素影响显著程度为:微波功率>样品堆积厚度>样品质量>辐射时间,且交互影响不显著。当微波功率为675W、作用时间为131.5s、样品堆积厚度为15.4mm、样品质量为153.6g时,碳酸锰的微波吸收率模拟值最优为6.28%,与实际试验结果(5.89%)能较好吻合,误差约为6.6%。响应面分析法对矿物微波处理过程的因素影响程度有较好的预测性。

Study on Microwave Absorbing Property of Manganese Carbonate Using Response Surface Methodology

Manganese carbonate was used as microwave absorbing material. The effects of microwave power, treating time, thickness, and mass of samples on microwave energy absorption rate were investigated. Based on single factor experimental results, response surface methodology(RSM) was adopted to design the optimized experiments, analyze the variance and curved surfaces, and to optimize the parameters of fitted mathematical model. The simulated results indicated that the significant level of factors were microwave power, thickness, mass of samples and treating time in order, respectively. The interaction between two of these factors was not significant. The optimized conditions were found as: microwave power was 675 W, time was 131.5 s, thickness was 15.4 mm, mass of samples was 153.6 g. Under these conditions, the predicted absorption rate reached 6.28% by the fitted model, while the actual experimental value was about 5.89% with small relative error to the former. Therefore, it showed that response surface design and its analysis had a good predicted performance in microwave treatment process of minerals.