一、试验方法应用70／140目江西硅砂为原砂进行正交试验，选择了三因素（PAT－Ⅱ粉、水分、陶土）三水平，柴油加入量不变（0．25％），试验结果见表1及图1。图组元加入是对型砂性能的影响二、结果分析1．PAF粉对性能的影响随PAF粉加入量的增加，型砂的干强度和湿强度都提高， First, the test method The 70/140 Jiangxi silicon sand as raw sand for orthogonal test, three factors (PAT-Ⅱ powder, moisture, clay) three levels, the same amount of diesel (0.25%), the test results See Table 1 and Figure 1. Figure component is to join the sand performance impact Second, the results of analysis 1. PAF powder on the performance With the addition of PAF powder increases, sand dry strength and wet strength are increased,