Beneficiation method for producing multi-product nickel concentrate
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A beneficiation method and multi-product technology, applied in the beneficiation field of pentlandite and nickel-containing pyrrhotite, to achieve the effect of improving the comprehensive recovery rate
Inactive Publication Date: 2018-12-04
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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However, the methods for recovering nickel from pentlandite and nickel-containing pyrrhotite in the prior art all need to improve the grade of the concentrate at the expense of the recovery rate of the concentrate, so it is urgent to develop a method that can improve the concentration of the concentrate. Mineral processing method without loss of concentrate recovery rate
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[0038] (1) The raw ore may be a mixed ore of pentlandite and nickel-containing pyrrhotite.
[0039] (2) The ore grinding can be carried out by using a vertical mill or a wet ball mill according to the method in the prior art.
[0040] (3) A mixture of sodium metabisulfite and diethylene triamine is added to at least one of the one-time roughing described in step a, the one-time beneficiation described in step b, and the one or more beneficiation described in step c As a pyrrhotite inhibitor.
[0041] (4) For each flotation (including rough selection, selection, sweep selection, low-nickel selection, low-nickel fine sweeping), collectors, foaming agents, activators, pulses can be added according to the existing technology. Stone inhibitors and modifiers; for example, terpineol oil can be used as foaming agent, copper sulfate can be used as pyrrhotite activator, guar gum and starch can be used as gangue inhibitors.
[0042] Specifically, the beneficiation method for producing multi-pro...
Embodiment 1
[0051] Such as figure 1 As shown, a beneficiation method for producing multi-product nickel concentrate can be used for flotation of mixed ore of pentlandite and nickel-containing pyrrhotite, which specifically may include the following steps:
[0052] Step a1. Grind the raw ore to prepare raw ore slurry, and add gangue mineral inhibitor addition, collector and foaming agent to the raw ore slurry for a rough separation, thereby obtaining a rough concentrate and a rough concentrate. Select tailings. Among them, gangue mineral inhibitor uses carboxymethyl cellulose (CMC) 500g / t, collector uses butyl xanthate 60g / t, and foaming agent uses methyl isobutyl carbinol (MIBC) 40g / t.
[0053] Step b1: Adding gangue mineral inhibitor and pyrrhotite inhibitor to the primary coarse beneficiation concentrate to perform primary beneficiation, thereby obtaining primary beneficiation concentrate and primary beneficiation tailings. Wherein, the gangue mineral inhibitor adopts carboxymethyl cellulo...
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Abstract
The invention discloses a beneficiation method for producing multi-product nickel concentrate. The beneficiation method comprises the following steps that primary selection is carried out on primary rough concentration concentrate so as to obtain primary fine concentrate and primary fine tailings; one-time or multiple selection is carried out on the primary fine concentrate until the high-nickel ore concentrate with the nickel grade of 10-22% is obtained; a magnetic pyrite activator, a collecting agent and a foaming agent are added into the primary roughing tailings to carry out secondary rough selection so as to obtain secondary rough concentrate and secondary rough tailings; and the primary fine tailings are combined with the secondary rough concentrate, at least one low-nickel concentration is carried out until the low-nickel ore concentrate with the nickel grade of greater than 5% is obtained. According to the beneficiation method, two types of nickel ore concentrate products can be obtained at the same time in the same beneficiation process, the requirement for producing high-grade nickel concentrate can be met, and the comprehensive recovery rate of nickel cannot be reduced.
Description
Technical field [0001] The invention relates to the technical field of beneficiation of nickel pyrite and nickel-containing pyrrhotite, in particular to a beneficiation method for producing multi-product nickel concentrate. Background technique [0002] Nickel has high mechanical properties and excellent corrosion resistance, and is mainly used to produce stainless steel. At present, the production of metallic nickel mainly comes from sulfide nickel ore. The most valuable nickel-containing minerals in industry are mainly pyrrhotite, with a theoretical nickel content of about 34.22%; in addition, pyrrhotite also contains nickel minerals with a nickel content of less than 1%. [0003] Recycling nickel in pyrrhotite can obtain higher-grade nickel concentrate, but at the same time recovering nickel in pyrrhotite will reduce the grade of nickel concentrate; if the nickel in pyrrhotite is not recovered, then Will cause loss of nickel recovery rate. Under normal circumstances, the bene...
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