一、前言 鑄造用砂是机械制造中不可缺少的材料之一。随着机械工业的迅速发展,对鑄造用砂的質与量上也将有更大的要求。但过去济南地区一向被人們認为沒有合适的造型用砂,因此都从南京,高密,濰坊等地运来,单就高密说,每一方砂約需15元,这不但在經济上造成很大浪費,而且在运輸繁忙的情况下,也难保証及时供应。因此对济南附近的原砂进行 I. Introduction Casting sand is one of the indispensable materials in machinery manufacturing. With the rapid development of machinery industry, the quality and quantity of foundry sand will also have greater requirements. However, in the past, Jinan people always thought that there was no suitable sand for molding, so they were shipped from Nanjing, Gaomi and Weifang. According to Gaomi, the cost of each square sand was about 15 yuan, which was not only economically significant Waste, but also in the case of heavy traffic, it is difficult to guarantee timely supply. Therefore, the original sand near Jinan