Gu Shouyu Iron Ore Adapts To The Stage Grinding Process

Anshan Iron and Steel Group Mining Company in the five kinds of grinding fineness of the magnetic tube experiments and found that the grinding fineness -0. 074 mm, accounting for 55% of the case, disposable yield 42 00% 871% grade tailings; the case of grinding fineness -0 074 mm accounted for 84% concentrate grade achieved 58.42%, abandoned tailings grade of 888%. Yield of 54.00%, so the Gu Shouyu iron oreore beneficiation suitable stage grinding and separation processes. Expand the magnetic condition tests showed that the period of mill valley first valley iron ore mine to -0. 074 mm accounted for 55%, a magnetic cast the end of a magnetic concentrate(concentrator table) after Sec grinding two magnetic throwing tail, three magnetic concentrate to in paragraph Sec fine sieve, under the screen as the final concentrate on the screen on the third segment of grinding and a magnetic cast tail gives three, four fine sieve, sieve As a final concentrate, as in mine, the end result of the test sieve for the ore grade of 31.90%. Concentrate grade of 65.53% fine mineral ratio 27.07%, in ore grade of 59.74% in mineral rate of 14 34%, 955% of the tailings grade tail mineral rate of 8.59%; grinding of Sec. closed-circuit, three, four fine sieve back to three sections of grinding for re-election test results showed that the concentrate grade of 65.05% when the ore grade of 31.72 cried 0:00 tailings grade IO. 2I%. Metal recovery rate of 80.43%.

Henan Wuyang Mining Company Tiegukeng iron ore iron minerals are magnetite for iron silicate and a small amount of hematite gangue minerals as jasper, pyroxene, and magnetite separation more difficult. Ore dilution ratio increased in recent years, selected ore grade dropped to 20.00%. Therefore, Wuyang mining companies have developed low-grade refractory magnetite energy efficient technology, multi-stage dry-type pre-selected, and more broken and less grinding, fine sieve a magnetic reunion magnetic scavenger tailings mention quality technical route, especially strengthen the primaries in the ore crushing process, to restore the grade of ore geology and improve the processing capability of the entire mineral processing equipment.

Low grade orebody of Tiegukeng not only iron ore low grade ore body thin, layered occurrence, mezzanine and more difficult to removed, and the open pit mining equipment, 4 Jm3 shovel, rock mixed with up to 25%, making ore iron grade into the concentrator to further reduce processing the 5t about ore can be 1t iron concentrate, and must therefore strengthen the pre-selected, shuffled around the waste rock, and improve the selected ore grade. To this end, the ore to the process of multi-stage pre-cast tail, worked in the installation of the crushing system rough broken and the broken loop, magnetic pulley, installed in the crushing circuit l Taiwan magnetic pulley. Magnetic pulley magnetic pulley is used in primary crushing circuit blows mixed in mining waste rock, the broken and crushing circuit for the dissociation elected broken chunk of gangue. The ore is pre-cast the end of the process shown in Figure 2.7 -2 shows, technology indicators, such as shown in Table 2.7 -7.

by: libby

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