A beneficiation process for open-pit lava iron ore with combined magnetic gravity upgrading and tailing reduction
A magnetic gravity combination and lava technology, applied in solid separation, chemical instruments and methods, wet separation, etc., can solve the problems of metal loss, high tailings grade, single means of production process adjustment, etc.
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Embodiment 1
[0038] Embodiment 1——Open Pit Lava Iron Ore Test
[0039] 1. Test sample preparation and properties
[0040] The Dahongshan open-pit lava iron mine was selected for the test, and the samples taken were subjected to coarse crushing-medium crushing-shrinkage-fine crushing-shrinkage respectively to prepare several equivalent test samples and preparation samples. The specific sample preparation process is as follows image 3 . Take 1 part of the test sample, mix it, shrink it, grind it, and send it to the laboratory. The raw ore grade and magnetic iron are shown in Table 1.
[0041] Table 1 Raw ore grade
[0042]
[0043] It can be seen from Table 1 that the open-pit lava iron ore has a TFe grade of 19.24%, a mFe grade of 13.38%, and a magnetic occupancy rate of 69.54%. The samples taken are representative.
[0044] 2. The main equipment of the test
[0045] Table 2 The main equipment of the test
[0046]
[0047] 3. Gravity separation test for quality improvement and t...
Embodiment 2
[0086] A beneficiation process of open-pit lava iron ore combined with magnetic gravity to improve quality and reduce tails, including one-stage grinding, one-stage weak magnetic separation, one-stage strong magnetic separation, two-stage grinding, two-stage weak magnetic separation, three-stage strong magnetic separation, centrifugal Machine selection steps include:
[0087] The pretreatment step, the pretreatment is to carry out coarse crushing, medium crushing and fine crushing of the open-pit lava iron ore raw ore, specifically, first use a jaw crusher for coarse crushing, and the particle size range after coarse crushing is 6~38mm, and then use The roller crusher is used for medium crushing, and finally the roller crusher is used for fine crushing again, and the particle size range after fine crushing is 5~15mm. The raw ore grade of the open-pit lava iron ore is 19.24% TFe grade, 13.38% mFe grade, and 69.54% magnetic occupancy rate.
[0088] 1) One-stage grinding: first ...
Embodiment 3
[0097] A beneficiation process of open-pit lava iron ore combined with magnetic gravity to improve quality and reduce tails, including one-stage grinding, one-stage weak magnetic separation, one-stage strong magnetic separation, two-stage grinding, two-stage weak magnetic separation, three-stage strong magnetic separation, centrifugal Machine selection steps include:
[0098] The pretreatment step, the pretreatment is to carry out coarse crushing, medium crushing and fine crushing of the open-pit lava iron ore raw ore, specifically, first use a jaw crusher for coarse crushing, and the particle size range after coarse crushing is 6~38mm, and then use The roller crusher is used for medium crushing, and finally the roller crusher is used for fine crushing again, and the particle size range after fine crushing is 5~15mm. The raw ore grade of the open-pit lava iron ore is 18% of TFe grade, 12% of mFe grade, and 68% of magnetic occupancy.
[0099] 1) One-stage grinding: first grind...
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