我厂型砂管理工作,虽然搞了一年多,但直到目前为止,工作中还存在着很多问题,需要继续加以解决。这里仅将过去情况作一初步的总结。一、一般情况:1．我厂所用的原砂,有下列几种:(1)浑河砂。颗粒很均匀,含有少量粘土(约2%),是一种很好的合成砂,适用于—般中型铸件及坭心用砂,尤其是水轮坭心砂都以此为主要配合成分。 Our factory sand management, although engaged in more than a year, but so far, there are still many problems in the work, we need to continue to be addressed. Here only a brief summary of the past situation. First, the general situation: 1. I used the original sand plant, the following categories: (1) Hunhe sand. The particles are very uniform and contain a small amount of clay (about 2%). They are a good synthetic sand and are suitable for - medium and medium sized castings and heart sand, especially for water wheel sand heart sand.