过筛煤粉在铸铁件湿型砂铸造生产中的作用

摘要

With the correct choice of coal, the combination of low ash, high volatile and swell index properties coupled with the key element of grading size, ensures castings are produced free from metal penetration and surface related problems. By careful selection, safe handling and processing coal continues to offer a good simple cost effective solution. Coal is subject to regulations in storage, processing and transportation and then further subjected to safe handling and use by the foundry. Despite these handicaps, it is still economical to the end user and modern processing and grading methods ensure it is used in the optimum condition to help produce quality castings.%正确选择煤粉,其性能要求同时具有低灰分、高挥发分和高膨胀指数,以及具有合适的筛分粒度这一关键因素,以确保所生产的铸件没有机械粘砂缺陷和表面质量问题.通过仔细选择、安全操作和加工处理,煤粉仍然是一个优良的、简易的、经济的有效解决方案.煤粉在储存、加工和运输过程中易于调节,然后经过进一步的安全处理,最终被铸造厂使用.尽管煤粉有诸多不足之处,对于最终用户来说,它仍然是经济合算的.而且现代加工和筛分方法确保它在最佳条件下使用.