基于响应曲面法的磷酸分解磷矿研究

Phosphate Rock Decomposition by Phosphoric Acid Based on Response Surface Method

以云南富藏的磷矿资源作为研究对象,考察了磷酸浓度、液固比和温度对磷矿转化率的影响。通过响应曲面实验设计(RSM),建立了磷酸分解磷矿过程的回归模型,该模型较好地反映了磷矿转化率与磷酸浓度、液固比和温度之间的关系;利用该模型优化得到分解最佳工艺条件为温度110℃,液固比9,磷酸浓度42%(P_2O_5计),在此工艺条件下磷矿转化率达99.29%,与模型预测值相对误差<1%,表明所得模型可以精确反映参数之间的相关关系,可以用于磷矿分解过程的预测与优化。

Based on phosphorite resources which largely exist in Yunnan Province,effects of phosphoric acid concentration,liquid-solid ratio and temperature on the conversion rate of phosphorite were investigated.A regression model of phosphoric acid decomposing phosphorite process were established through experimental design of response surface method（RSM）.The relationship among the conversion of phosphate rock and the phosphoric acid concentration,liquid-solid ratio and temperature were reflected by this regression model.The optimal technological conditions of decomposition were temperature of 110℃,liquid-solid ratio of 9 and phosphoric acid concentration of 42% P2O5 through this model.And the conversion rate of phosphate rock reached 99.29% under this process condition.Compared with the predicted value,the relative error was less than 1%.It indicated that the relationship between the parameters could accurately reflected by the regression model.Thua,the prediction and optimizaiton about decomposition of phosphate rock could be used this model.