以烧结灰水浸渣为原料、酸性硫脲溶液为浸出剂，采用超声强化法研究了超声波功率、颗粒尺寸、浸出时间、硫脲浓度、反应温度对银浸出率的影响，在此基础上采用响应曲面法(RSM)优化设计银浸出实验，获得烧结灰中提银的最佳工艺条件和二阶多项式模型. 结果表明，在超声波功率400 W、颗粒尺寸75~96 ?m、浸出时间90 min、硫脲浓度22 g/L、反应温度50℃条件下，银浸出率的模型预测值为96.15%，实测值为95.7%，相对误差为0.45%，可用该模型预测烧结灰提取银过程.

The water washed sintering dust was used as raw materials. Acidic thiourea was applied for silver extraction with ultrasonic-augment technology in the leaching process. The effects of ultrasonic power, particle size, leaching time, thiourea concentration and reaction temperature were explored. On the basis of experiments, the response surface methodology (RSM) was used to optimize the extraction process to obtain the optimal process parameters and two order polynomial equation of fitting model. The results showed that optimum conditions at particle size with 75~96 ?m, the leaching time at 90 min, thiourea concentration is 22 g/L and reaction temperature is 50℃, the model predictive value of silver can reach 96.15%, while the experimental value is 95.7%, with a relative error 0.45% to theoretical value. It is indicated that the model can be used to predict silver extraction process from water washed sintering dust.