Research And Application Of The High-abrasive Material

Baoshan iron ores minerals dissemination size is of an average of 46.57 p

, m gangue minerals dissemination size is 53 66 um, iron minerals +0. 074 mm grain size accounted for 58.57%, .074 ~ 0.015 mm grain size accounting 36.69%, -0.015 Mm grain size accounting 474%. The thickness of the distribution of iron minerals is uneven, appropriate to adopt hierarchical sorting process; iron minerals and gangue mineral particle size distribution is basically the same, suitable for mill continuous grinding selected. According to the nature of the mine ore, Angang Group and mining companies determine to use two consecutive grinding, thickness of the separator, the associated process of re-election, magnetic flotation as well as flotation of the coarse middle ore. The test re-election is carried out on the basis of laboratory tests. Election for the test can stably operate for 8h with fineness of grinding fineness -0 074 mm accounted for 74%, ore grade 31 09% in fineness -0 074 mm accounted for 72. 27qc yield 123 3%, and then grinding -0 074 mm accounted for 84%. Under the condition of the fineness of the cyclone overflow -0 074 mm accounting 99% of the thickness, to get concentrate grade of 64. 68qo tailings grade 12 47%, 35.66% of the rate of fine mineral, a good indicator that the recovery rate is of 74.19%.

Ore by the two closed-circuit grinding gives the thickness grade flow classification; The hydrocyclone grit by spiral chute roughing and selected gets the re-election to concentrate; Industrial test results for ore processing capacity is of 53 t / (Taiwan. H). Period of grinding fineness -0.074 mm accounts for 40% to 45%. Sec grinding fineness -0 074 mm accounts for 75% to 80% of the thickness graded the fineness of the cyclone overflow -0 074 mm accounts for 95%. The ratio of grade flow classification is 75:25, and then pulverized -0. 074 mm, accounting for 50% to 60% in mineral rate of 132.67 percent, the strong magnetic excitation current is l 300 A while the sweep in the magnetic excitation current is 750 A, (Ore) of NaOH 495 g / t starch 374 g, / t, of Ca0 204 g / t, flotation 177g / t, flotation dosage. Ore grade 30 69%, 64,62% concentrate grade, tailings grade of 15.63 percent, the rate of fine mineral 30.73qo recovery rate of 64.61%.

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