Method for purification of iron ores in deep ore body
A purification method and iron ore technology, applied in chemical instruments and methods, solid separation, wet separation, etc., can solve problems such as uneven particle size distribution of hematite, low content of muddy minerals, rare research reports, etc., to achieve The effect of comprehensive utilization is good, the recovery rate is improved, and the environmental pollution is small.
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Embodiment 1
[0030] The deep ore body iron ore is crushed to a particle size of 2~15mm; then the part that is ground to -0.043mm accounts for 70% of the total weight to obtain primary fine ore; the iron grade of the deep ore body iron ore is 25 %, SiO 2 The weight content is 50%;
[0031] Add water to the primary fine ore to make a primary slurry with a weight concentration of 30%, and then perform a magnetic separation under the condition of a magnetic field strength of 1000 Oersted to obtain a magnetic separation concentrate and a magnetic separation tailings. The iron grade is 55%; the iron grade of the primary magnetic separation tailings is 25%;
[0032] Concentrate the primary magnetic separation tailings to a weight concentration of 30% , Then carry out secondary magnetic separation under the condition of 4000 Oersted to obtain secondary magnetic separation concentrate and secondary magnetic separation tailings, the iron grade of secondary magnetic separation concentrate is 30%; ...
Embodiment 2
[0040] Purification method is with embodiment 1, and difference is:
[0041] The iron grade of iron ore in the deep ore body is 30%, SiO 2 The weight content is 48%; the part of -0.043mm in the primary powder ore after grinding accounts for 75% of the total weight;
[0042] Add water to the primary fine ore to make a primary slurry with a weight concentration of 35%, and then conduct a magnetic separation under the condition of a magnetic field strength of 2000 Oersted. The iron grade of the primary magnetic separation concentrate obtained is 58%; the primary magnetic separation tailings The iron grade is 22%;
[0043]Concentrate the primary magnetic separation tailings to a weight concentration of 35% , Then carry out secondary magnetic separation under the condition of 5000 Oersted, the iron grade of the obtained secondary magnetic separation concentrate is 33%;
[0044] The part of -0.043mm in the secondary powder ore after grinding accounts for 80% of the total weight; ...
Embodiment 3
[0051] Purification method is with embodiment 1, and difference is:
[0052] The iron grade of iron ore in the deep ore body is 35%, SiO 2 The weight content is 46%; the part of -0.043mm in the primary powder ore after grinding accounts for 80% of the total weight;
[0053] Add water to the primary fine ore to make a primary slurry with a weight concentration of 40%, and then conduct a magnetic separation under the condition of a magnetic field strength of 1500 Oersted, and the iron grade of the obtained primary magnetic separation concentrate is 61%; the primary magnetic separation tailings The iron grade is 21%;
[0054] Concentrate the primary magnetic separation tailings to a weight concentration of 40% , Then carry out secondary magnetic separation under the condition of 6000 Oersted, the iron grade of the obtained secondary magnetic separation concentrate is 38%;
[0055] The part of -0.043mm in the secondary powder ore after grinding accounts for 85% of the total wei...
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