Novel method for producing iron concentrates through complex refractory iron ore
A technology for iron ore and iron ore concentrate, which is applied in the field of complex refractory iron ore production of iron ore concentrate, and achieves the effects of good economy, nodulation prevention and stable product index.
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Embodiment 1
[0035] The complex refractory iron ore in this example is JISCO fine ore, which is a complex refractory iron ore containing specularite, limonite, siderite, hematite and other iron minerals , the iron grade is 37.1%, the current production index is the concentrate grade is 46-48%, the recovery rate is 60-70%, the process of producing iron concentrate is as follows figure 1 shown, follow the steps below:
[0036] (1) Crushing the complex and refractory iron ore to a particle size of ≤20mm, putting it into a closed-circuit grinding system composed of a ball mill and a cyclone for grinding and grading treatment, and obtaining the part of the graded overflow product with a particle size of -0.074mm accounting for the iron ore 55% of the total weight of the stone;
[0037] (2) Carry out magnetic separation pre-enrichment for graded overflow products. First, use weak magnetic separator to perform weak magnetic separation to obtain weak magnetic separation concentrate and weak magne...
Embodiment 2
[0044]The complex refractory iron ore in this embodiment is Donganshan iron ore, which is a complex refractory iron ore containing various iron minerals such as magnetite, limonite, siderite, and hematite. The iron grade is 33.25%. The current production index is 63% concentrate grade and 65% recovery rate. The process for producing iron concentrate is as follows: figure 1 shown, follow the steps below:
[0045] (1) Crushing the complex and refractory iron ore to a particle size of ≤20mm, putting it into a closed-circuit grinding system composed of a ball mill and a cyclone for grinding and grading treatment, and obtaining the part of the graded overflow product with a particle size of -0.074mm accounting for the iron ore 55% of the total weight of the stone;
[0046] (2) Carry out magnetic separation pre-enrichment for graded overflow products. First, use weak magnetic separator to perform weak magnetic separation to obtain weak magnetic separation concentrate and weak magne...
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