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现代矿业 ›› 2024, Vol. 40 ›› Issue (04): 147-.
安徽某选厂原矿铁品位为 20.65%，有害元素硫含量为 3.80%，磷含量为 0.21%。原矿
中主要含铁矿物磁铁矿分布率为 63.13%。为提高入磨料品位，降低选比和选厂运行成本，对细碎
产品进行了预先抛废试验，得出细碎产品（-16 mm）干式磁选抛废最佳的工艺参数：磁场强度为
278.66 kA/m，分隔板距离为 22 cm，皮带线速度为 2.0 m/s，该条件下可得到全铁品位为 22.58% 的
干选精矿，尾矿产率为 24.42%，尾矿中磁性铁含量为 2.92%。模拟生产现场，将干选粗精矿辊压
至-5 mm 进行湿式粗粒磁选抛尾试验，结果表明，干选精矿经湿式磁选抛尾后，可将入磨品位提高到
29.77%，入磨料品位明显提高。试验结果可为现场工艺流程改造提供技术依据。
The iron grade of raw ore from a concentrator in Anhui is 20.65%，the sulfur content of
harmful elements is 3.80%，and the phosphorus content is 0.21%. The distribution rate of magnetite，the
main iron-bearing mineral in the raw ore，is 63.13%. It also contains a small amount of pyrite and iron car⁃
bonate. In order to improve the grade of the abrasive，reduce the selection ratio and the operation cost of the
plant，the pre-discarding test was carried out on the finely crushed products of the plant. The results show
that the optimal process parameters for the discarding of fine products (-16 mm) by dry magnetic separation
are as follows: the magnetic field strength is 278.66 kA/m，the separation plate distance is 22 cm，and the
belt line speed is 2.0 m/s.Under these conditions，the total iron grade of concentrate is 22.58%，the tailings
yield is 24.42%，and the magnetic iron content in the tailings is 2.92%. By simulating the production status，
the dry rough concentrate was rolled to -5 mm to carry out the tailings discarding test of wet coarse magnetic
separation. The test results show that after the tailings discarding of dry concentrate by wet magnetic separa⁃
tion，the grinding grade can be increased to 29.77%，and the abrasive grade can be significantly improved.
The test results can provide technical basis for process transformation.
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