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Combined reagent for desulfurizing fine iron powder under alkaline condition and method for desulfurizing pyrrhotite by adopting combined reagent

A technology of combining agents and alkaline conditions, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of high industrial application cost, corrosion of flotation equipment, large dosage, etc., to reduce the probability of falling off and strengthen Effect of flotation, porosity increase

Active Publication Date: 2021-06-01
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 reagent for desulfurizing fine iron powder under alkaline condition and method for desulfurizing pyrrhotite by adopting combined reagent
  • Combined reagent for desulfurizing fine iron powder under alkaline condition and method for desulfurizing pyrrhotite by adopting combined reagent
  • Combined reagent for desulfurizing fine iron powder under alkaline condition and method for desulfurizing pyrrhotite by adopting combined reagent

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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 elements in the ore of this mine are distributed in the pyrrhotite, accounting for 60%. Specific steps are as follows:

[0034] (1) Blending. The iron ore containing pyrrhotite is subjected to one-stage grinding, the grinding concentration is 69%, and the grinding fineness (-0.074mm) is 54%. Adjust the concentration of the obtained pulp to 22%, add lime at a dosage of 3kg / t, adjust the pH of the pulp to 9, and stir for 4 minutes;

[0035] (2) Rough selection. During the stirring process, add activator 1, the dosage is 450g / t, and stir for 1min; add the solution (reaction time 30min) made of activator 2 and 3 according to the mass ratio of 1:1.2, the dosage is 330g / t, and stir for 3min; Add combined collector at an amount of 120g / t, add foaming agent at an amount of 8g / t, stir for 2 minutes, and conduct roughing for 12.5 minutes to obtain roughing foam concentrate and roughing ta...

Embodiment 2

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

[0046] (1) Blending. The magnetite containing pyrrhotite is subjected to one-stage grinding, the grinding concentration is 65%, and the grinding fineness (-0.074mm) is 52%. Adjust the concentration of the obtained pulp to 22%, add lime at a dosage of 7kg / t, adjust the pH of the pulp to 11, and stir for 4 minutes;

[0047](2) Rough selection. During the stirring process, add activator 1, the dosage is 660g / t, and stir for 1min; add activator 2 and 3 according to the mass ratio of 1:1.1 solution (reaction time 30min), the dosage is 470g / t, stir for 3min; Add combined collector at an amount of 130g / t, add foaming agent at an amount of 9g / t, stir for 2 minutes, and conduct roughing for 13 minutes to obtain roughing foam concentrate and roughing tailings. ...

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Abstract

The invention relates to a reagent for mineral flotation, and in particular, relates to a combined reagent for desulfurizing fine iron powder under an alkaline condition and a method for desulfurizing pyrrhotite by adopting the combined reagent. The combined reagent for desulfurizing the fine iron powder under the alkaline condition comprises a combined activating agent and a combined collecting agent, wherein the combined activating agent comprises an activating agent 1, an activating agent 2 and an activating agent 3, the activating agent 1 is FeSO4.7H2O, the activating agent 2 is NH4Cl, and the activating agent 3 is CuSO4.5H2O; the combined collecting agent comprises butyl xanthate and ammonium dibutyl dithiophosphate; the mass ratio of the activating agent 1 to the activating agent 2 to the activating agent 3 is 3:1:(0.8-1.2); and the mass ratio of the butyl xanthate to the ammonium dibutyl dithiophosphate is 3:1. According to the combined reagent, the purpose of reducing sulfur of the fine iron powder can be achieved through flotation under the alkaline condition, the invention further provides the method for desulfurizing pyrrhotite through the combined reagent, the defects existing in flotation under the acidic condition are overcome, and the desulfurization effect is good.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(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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