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Combined agent for desulfurization of iron fine powder under alkaline conditions and method for desulfurization of pyrrhotite by using the same

A technology of combining medicaments and alkaline conditions, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of high cost, large consumption, and corrosion of flotation equipment in industrial applications, and reduce the probability of shedding, porosity, etc. rate increase, strengthen the effect of flotation

Active Publication Date: 2022-07-22
SHANDONG JINLING MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Chinese invention patent CN 108097452A discloses a kind of "Minere-dressing Process for Producing High-quality Iron Concentrate from Iron Ore", which uses aluminum sulfate or a mixture of aluminum sulfate and ammonium fluorosilicate at a mass ratio of 3-1:1-2 or mass Ratio 1-2:3-2 The mixture of aluminum sulfate and sodium phosphate is used as the pH adjuster and activator of pyrrhotite, and the flotation desulfurization is carried out under the condition of adjusting the pH to 4.5-5.5, but the acidic condition is harmful to the flotation equipment, pipe Roads, etc. are severely corroded, the amount is large, and the cost of industrial application is high

Method used

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  • Combined agent for desulfurization of iron fine powder under alkaline conditions and method for desulfurization of pyrrhotite by using the same
  • Combined agent for desulfurization of iron fine powder under alkaline conditions and method for desulfurization of pyrrhotite by using the same
  • Combined agent for desulfurization of iron fine powder under alkaline conditions and method for desulfurization of pyrrhotite by using the same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The iron ore containing pyrrhotite in a certain mine was used for the test. Most of the S element in the ore of this mine is distributed in the pyrrhotite, accounting for 60%. Specific steps are as follows:

[0034] (1) Sizing. The iron ore containing pyrrhotite is subjected to one-stage grinding, the grinding concentration is 69%, and the grinding fineness (-0.074mm) is 54%. The concentration of the obtained pulp was adjusted to 22%, lime was added in an amount of 3kg / t, the pH of the pulp was adjusted to 9, and stirred for 4 minutes;

[0035] (2) Rough selection. In the stirring process, add activator 1, the dosage is 450g / t, and stir for 1min; add the solution prepared by activator 2 and 3 according to the mass ratio of 1:1.2 (reaction time 30min), the dosage is 330g / t, and stir for 3min; Add a combined collector at a dosage of 120g / t, add a foaming agent at a dosage of 8g / t, stir for 2min, and carry out roughing. The roughing time is 12.5min to obtain roughing fo...

Embodiment 2

[0045] The high-sulfur raw ore containing pyrrhotite in a certain mine was selected for the test, and the S element distributed in the pyrrhotite accounted for 45% of the raw ore. The specific implementation steps are as follows:

[0046] (1) Sizing. The magnetite containing pyrrhotite is ground in one stage, the grinding concentration is 65%, and the grinding fineness (-0.074mm) is 52%. The concentration of the obtained pulp was adjusted to 22%, lime was added in an amount of 7kg / t, the pH of the pulp was adjusted to 11, and stirred for 4 minutes;

[0047](2) Rough selection. During the stirring process, add activator 1, the dosage is 660g / t, and stir for 1min; add the solution prepared by activator 2 and 3 according to the mass ratio of 1:1.1 (reaction time 30min), the dosage is 470g / t, and stir for 3min; Add a combined collector in an amount of 130g / t, add a foaming agent in an amount of 9g / t, stir for 2min, and carry out roughing. The roughing time is 13min to obtain rou...

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Abstract

The invention relates to an agent for mineral flotation, in particular to a combined agent for desulfurization of iron fine powder under alkaline conditions and a method for desulfurizing pyrrhotite by using the same. The combined agent for desulfurization of iron fine powder under alkaline conditions includes a combined activator and a combined collector, the combined activator includes activator 1, activator 2 and activator 3, and activator 1 is FeSO 4 ·7H 2 O, activator 2 is NH 4 Cl, Activator 3 is CuSO 4 ·5H 2 O; the combined collector includes butyl xanthate and butyl ammonium black medicine; the mass ratio of described activator 1, activator 2 and activator 3 is 3:1:0.8-1.2; the described butyl xanthate The mass ratio with butylammonium black medicine is 3:1. The combined agent of the present invention can achieve the purpose of reducing sulfur of iron fine powder through flotation under alkaline conditions, and the present invention also provides a method for desulfurizing pyrrhotite by adopting the same, which avoids the defects of flotation under acidic conditions. , the desulfurization effect is good.

Description

technical field [0001] The invention relates to an agent for mineral flotation, in particular to a combined agent for desulfurization of iron fine powder under alkaline conditions and a method for desulfurizing pyrrhotite by using the same. Background technique [0002] Iron powder with high sulfur content will have adverse effects on subsequent smelting and steel. The high sulfur grade makes the steel hot brittle, reduces the ductility and toughness of the steel, and causes cracks during forging and rolling. Sulfur is also detrimental to weldability, reducing the corrosion resistance of the steel. At the same time, in the smelting process, it is easy to generate SO 2 , causing environmental pollution. Reducing the sulfur content of iron concentrate is an important scientific research task in the field of mineral processing, and has a positive effect on my country's national economy and environmental protection. [0003] In sulfur-bearing magnetite deposits, the ore comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/018B03D1/00B03B1/00B03B9/00B03C1/02B03D101/02B03D103/02
CPCB03D1/018B03D1/00B03B1/00B03B9/00B03C1/02B03D2201/02B03D2203/02
Inventor 韩西鹏陈永伟李金梁张伟邢汉明王涛王乃强刘呈增王超
Owner SHANDONG JINLING MINING CO LTD
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