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现代矿业 ›› 2024, Vol. 40 ›› Issue (03): 117-121.
安徽某选厂为提高处理量，以全铁品位 35.17% 的中碎产品为试样，进行了 2种不同方
案的高压辊磨系统优化试验研究。中碎产品全部预先筛分—筛上干选—辊磨试验不同筛孔尺寸预
先筛分试验结果表明：给矿中细粒级越少，越有利于新生成-5 mm 粒级产品，预先筛分筛孔尺寸为
5 mm时，新生成的-5 mm粒级含量最多，达57.99%。中碎产品部分预先筛分—筛上产品干选合并未
筛分给矿高压辊磨试验结果表明：随着中碎产品分矿比例的降低，辊压给矿中-5 mm粒级含量降低，
新生成-5 mm粒级含量增加；当分矿比为3∶1时，新生成的-5 mm粒级含量最高，为45.36%。试验结
果对比表明，采用全部预先筛分—筛上干选—辊磨试验方案指标最好，较中碎产品直接进行高压辊
磨，新生成-5 mm粒级含量提高25.47个百分点。
In order to improve the treatment capacity of a concentrator in Anhui Province，two differ⁃
ent schemes of high pressure roller mill system optimization test were carried out with medium crushing
products with total iron grade of 35.17% as samples.All the medium crushing products were pre-screen⁃
ing-screened onsize dry separation-roll mill test. The pre-screening test results of different sieve sizes
showed that the less the fine particle size in the ore feeding，the more favorable it was for the new genera⁃
tion of -5 mm particle size products. When the pre-screening sieve size was 5 mm，the content of the newly
generated -5 mm particle size was the highest，up to 57.99%.The high-pressure roller mill test results of
pre-screening of middle crushing products-dry separation of screened onsize products combined with un⁃
screened ore feeding show that with the decrease of the separation ratio of middle crushing products，the con⁃
tent of -5 mm particle size in roller feeding decreases，and the content of newly generated -5 mm particle
size increases. When the ore separation ratio is 3∶1，the content of the newly generated -5 mm fraction is
the highest，which is 45.36%.The comparison of test results shows that the test scheme of all pre-screening
screened onsize dry separation-roll grinding has the best index. Compared with the medium crushing prod⁃
uct directly subjected to high-pressure roll grinding，the content of the newly generated -5 mm fraction is
increased by25.47percentage points.
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