一、问题的提出中国纺织机械厂的某些铸件,长期存在着热节粘砂问题,见图1。过去,一般都认为粘砂与型砂的耐火度、煤粉的加入量、有效粘土含量、砂型比压、铁水的氧化程度及浇注温度等因素有关。因此,该厂为了消除 First, the issue put forward Some of China’s textile machinery plant castings, long-term hot sticky sand issue, see Figure 1. In the past, sticking sand and sand generally considered the refractoriness, the amount of coal added, the effective clay content, the sand than the pressure, the degree of oxidation of molten iron and pouring temperature and other factors. Therefore, the factory in order to eliminate