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Efficient reverse flotation method for improving grade of fine-grain refractory magnetite

A magnetite and reverse flotation technology, applied in flotation, solid separation, etc., can solve the problems of difficult on-site operation, complex chemical system, and low grade of fine iron ore, so as to reduce the dosage of chemical agents, simplify the chemical system, The effect of reducing pollution

Pending Publication Date: 2022-03-15
HUNAN SHIZHUYUAN NON FERROUS METAL
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a high-efficiency reverse flotation method for improving the grade of fine-grained refractory magnetite. , and technical issues that are difficult to operate on site

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  • Efficient reverse flotation method for improving grade of fine-grain refractory magnetite
  • Efficient reverse flotation method for improving grade of fine-grain refractory magnetite
  • Efficient reverse flotation method for improving grade of fine-grain refractory magnetite

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0028] Such as figure 2 and 3 As shown, the present invention discloses a kind of high-efficiency reverse flotation method that improves fine-grained refractory magnetite grade, and it specifically comprises steps:

[0029] S1. Put the magnetite concentrate with iron grade of 58.31%, sulfur content of 1.22%, and grinding fineness of -400 mesh accounting for 93.61% into the mixing tank, and add OS-2 flotation agent, stir for 3 minutes, and then carry out roughing, Obtain coarse concentrate and tailings;

[0030] S2. Carry out twice beneficiation to coarse concentrate foam, carry out two sweepings to roughing tailings; Described twice beneficiation is respectively the first beneficiation and second beneficiation, and two sweepings are r...

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Abstract

The efficient reverse flotation method comprises the steps that magnetite concentrate with the iron grade being 58.31%, the sulfur content being 1.22% and the ore grinding fineness being-400 meshes accounting for 93.61% is put into a stirring barrel, an OS-2 flotation agent is added, stirring is conducted for 3 min, then roughing is conducted, and rough concentrate and tailings are obtained; the rough concentrate is subjected to two times of fine selection, and tailings are subjected to two times of scavenging; the rough concentrate is subjected to first-time concentration and second-time concentration, and gangue ore is obtained; carrying out primary scavenging and secondary scavenging on the tailings to obtain refined iron ore; wherein the reagent condition for roughing is as follows: OS-2 is 150-200g / t; the first concentration and the second concentration do not need to use chemicals; the reagent condition of the first scavenging is 30-40g / t, and the reagent condition of the second scavenging is 10-20g / t. According to the invention, the medicament system is simplified, and the medicament dosage is reduced.

Description

technical field [0001] The invention relates to the field of reverse flotation methods for fine-grained refractory magnetite, in particular to a high-efficiency reverse flotation method for improving the grade of fine-grained refractory magnetite. Background technique [0002] The grinding fineness of magnetite concentrate in the existing concentrator has reached -400 mesh, accounting for about 92%, the grade of magnetite concentrate is 57.02%, and the sulfur content is about 1%. The reverse flotation method is used to further improve the quality of the iron ore concentrate, and the reverse flotation adopts a process of first roughing, second beneficiation, and two times of sweeping closed-circuit intermediate ore return process. Rough selection of reverse flotation agent conditions: calcium chloride 500g / t, caustic starch 800g / t, oleic acid 300g / t; refiner 1: caustic starch 100g / t; refiner 2: caustic starch 60g / t; sweep 1: oleic acid 40g / t; Sweep 2: oleic acid 20g / t; After...

Claims

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Application Information

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IPC IPC(8): B03D1/001B03D1/02B03D101/00B03D103/02
CPCB03D1/001B03D1/025B03D2201/00B03D2203/02
Inventor 龙冰何斌全谢加文过建光黄伟生徐涛
Owner HUNAN SHIZHUYUAN NON FERROUS METAL