据我们初步估计,仅本钢、鞍钢、首钢、邯邢冶金矿山局所属的选矿厂,每年替换下来的尼龙细筛旧筛片约有7～8万片。由于尼龙原料价格较贵,因此将这些更换下来的旧筛片加以回收再利用,对降低生产成本是很有现实意义的。从1982年开始,北京矿冶研究总院与山东烟台第七塑料厂(原山东福山塑料厂)协作,开 According to our preliminary estimates, only Benxi Iron and Steel, Anshan Iron and Steel, Shougang, Handan Xing Metallurgical Mining Bureau belongs to the beneficiation plant, replacing the old nylon sieve screen each year about 7 to 80,000 tablets. Due to the high price of nylon raw materials, the replacement of these old sieve sieve to be reused, to reduce production costs is of great practical significance. Since 1982, Beijing Mining and Metallurgy Research Institute and Shandong Yantai Seventh Plastic Factory (formerly Shandong Fukuyama Plastic Factory) collaboration, open