Using magnetic separator to remove iron from lean ore has become the mainstream in the market.
(I) the "magnetic separation -- fine sieve and re-grinding process" is applicable to the ore with uneven grain size in most of the lean magnets, low content of harmful impurities such as sulfur and phosphorus in the raw ore, mainly magnetic minerals and very little content of hematite and limonite.
(2) "magnetic separation-fine screen re-grinding process" has the advanced technology and economic rationality.The raw ore throws qualified tailings under the condition of rough grinding, which reduces the processing capacity of subsequent grinding and separation operations.The single magnetic separation process has the advantages of high metal recovery, simple process and low production cost.Fine screening and re-grinding can fully dissociate fine grain embedded cloth and iron ore in the form of inclusion. Magnetization before screening can not only improve the screening grade of fine sieve, but also reduce the amount of ore feeding and re-grinding of fine sieve, which can give full play to the role of fine sieve and improve the screening efficiency.
(3) the "magnetic separation-fine sieve regrinding process" has been adopted to treat mixed ore and poor magnetite ore in shandong province with satisfactory results, which fully proves that the process is a reasonable and advanced process for treating poor ore.
