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近年来我国有20多个选矿厂采用了细筛再磨自循环工艺(计约2000台尼龙细筛),使磁选厂铁精矿品位达到65～68％。首钢大石河选矿厂的二段磨矿——分级——选别作业,先后全部采用了细筛再磨自循环工艺,从而铁精矿品位已由设计的63％上升至68.5％以上。继一九七九年铁精矿荣获国家“金牌产品”后,一九八四年在厂际竞赛评比中又被冶金部命名为“优质品”。 但是,这种尼龙细筛经过普遍推广应用后,日积月累更换下来的废旧筛网越来越
In recent years, more than 20 beneficiation plants in our country have adopted the fine-mesh resharpening self-circulation process (about 2000 sets of fine nylon screens) to make the grade of iron concentrates of magnetic separation plant reach 65-68%. Shougang Dashihe beneficiation plant grinding - grading - sorting operations, have all adopted a fine sieve regrinding since the cycle process, so that the grade of iron concentrate from 63% of the design increased to 68.5%. Following the iron concentrate won the national “gold medal” in 1979, it was again named “Quality Product” by the Ministry of Metallurgy in 1984 in the interstate competition. However, this nylon fine sieve through the widespread promotion and application, over time, the replacement of the waste sieve more and more