济南水泥厂已连续21年,坚持用石灰石连同废渣一起“吃尽”的办法,来生产325、425号水泥。不仅全面综合利用了矿山资源,而且使产品成本、经济效益达到了全国同类企业的先进水平。1961年以前,这个厂也同大多数水泥厂一样,从矿山中选取合格的石灰石作水泥原料,矿山利用率只有70%左右。不仅矿山资源严重浪费,生产成本高,经济效益低,而且也不适应生产日益发展的需要。为了保护矿山资源,提高经济效益,从1962年起,他们开始对矿山的综合利用进行了研究。厂里以化验室为主组成一个研究小组,到矿山分层解剖矿体,做了100多次取样分析,取得600多个数据。在分清矿山各类石样化学成份和杂土、山皮性质的基础上,经过一年多的反复配比实践,终于在1964年用石灰石与山皮、杂土、废渣相混合的 Jinan Cement Plant has been 21 consecutive years, insist on using limestone together with the waste residue “to eat” approach to produce 325,425 cement. Not only comprehensive and comprehensive utilization of the mine resources, but also make the product cost, economic efficiency has reached the advanced level of similar enterprises. Before 1961, like most cement plants, this plant also selected qualified limestone as raw material for cement, and the utilization rate of mines was only about 70%. Not only is the mine resource seriously wastage, the production cost is high, the economic benefit is low, but also it is not suitable for the needs of the increasingly developed production. In order to protect the resources of mines and increase their economic benefits, from 1962 they began to study the comprehensive utilization of mines. The laboratory mainly composed of a research team to the mine stratified anatomical ore body, do more than 100 sample analysis, made more than 600 data. On the basis of distinguishing the chemical composition of various types of stone samples from mines and the nature of mountainous and mountainous skins, after more than a year of repeated matching practice, the limestone and skins were finally mixed in 1964