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Composite inhibitor for reverse flotation of carbonate-containing iron ore as well as preparation method and application of composite inhibitor

A compound inhibitor and reverse flotation technology, applied in flotation, chemical instruments and methods, magnetic separation, etc., can solve the problems of unfavorable food security, poor selectivity of flotation reagents, easy sludge, etc., and reduce the consumption of grain resources. , Improve the flotation effect, enhance the hydrophilic effect

Active Publication Date: 2021-12-17
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the "weak magnetic separation-strong magnetic separation-reverse flotation combined process" is usually used for this kind of complex refractory ore, but due to the Mohs hardness of iron dolomite, calcite, siderite and other carbonate minerals contained in the ore are relatively Low, it is easy to muddy during the grinding process, and a large amount of fine mud minerals are dispersed in the pulp. Because these mineral particles have high specific surface area and surface energy, fine mud cover is produced during the flotation process, surface transformation and Flotation foam entrainment and other problems lead to poor selectivity of flotation reagents, low flotation recovery rate and large dosage of reagents, seriously deteriorating the selection environment
In addition, the inhibitors used in the past are mainly natural starch extracted from corn, cassava and other food crops as raw materials. Usually, the dosage per ton of ore is about 1-2kg. Safety

Method used

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  • Composite inhibitor for reverse flotation of carbonate-containing iron ore as well as preparation method and application of composite inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Prepare cornstarch and sodium alginate into an emulsion with a concentration of 50% according to the mass ratio of 0.5:1, then add it to a constant temperature hydrothermal reaction kettle and keep stirring, then add cornstarch and alginic acid Sodium hydroxide and 4% sodium chloride with a total mass of sodium of 8%, the reaction temperature is controlled at 60°C, and the reaction is carried out for 5 hours;

[0035] (2) After reacting for 5 hours, add polyacrylamide with 10% of the total mass of cornstarch and sodium alginate, adjust the reaction temperature to 85°C, continue to react for 4 hours to obtain a composite inhibitor, neutralize the composite inhibitor, wash and filter , dried and then prepared into an aqueous solution with a concentration of 8% for later use.

Embodiment 2

[0037] (1) Prepare cornstarch and sodium alginate into an emulsion with a concentration of 40% according to the mass ratio of 1:1, then add it to a constant temperature hydrothermal reaction kettle and stir continuously, then add cornstarch and alginic acid 5% sodium hydroxide and 3% sodium chloride of the total sodium mass, the reaction temperature is controlled at 50°C, and the reaction is 3h;

[0038] (2) After 3 hours of reaction, add polyacrylamide with 10% of the total mass of cornstarch and sodium alginate, adjust the reaction temperature to 80°C, and continue to react for 3 hours to obtain a composite inhibitor, neutralize the composite inhibitor, wash and filter , dried and then prepared into a 5% aqueous solution for later use.

Embodiment 3

[0055] A carbonate-containing iron ore mixed magnetic concentrate in Liaoning area was used as the flotation raw material. The particle size analysis result was -0.038mm, accounting for 89.62%. The TFe grade in the ore sample was 43.02%, and the SiO2 content was 50.68%. The salt mineral content is 6.86%.

[0056] The specific implementation steps are as follows:

[0057] (1) Stir the obtained carbonate-containing iron ore mixed magnetic concentrate to adjust the slurry to a slurry with a mass concentration of 35%, and then add the slurry pH value regulator sodium hydroxide to adjust the slurry pH value 11.0, add compound inhibitors in sequence, the dosage of medicament is 600g / t, the dosage of gangue mineral activator lime is 600g / t, the dosage of collector sodium oleate is 500g / t, the dosage of No. 2 oil of foaming agent is 30g / t, adjust After slurrying for 3 minutes, carry out the reverse flotation roughing test, and the roughing time is 5 minutes;

[0058] (2) Carry out a...

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Abstract

The invention relates to a composite inhibitor for reverse flotation of carbonate-containing iron ore as well as a preparation method and application of the composite inhibitor. The preparation method is characterized by comprising the process steps of carrying out stirring and size mixing on carbonate-containing iron ore mixed magnetic concentrate, sequentially adding a composite inhibitor, an activating agent, a collecting agent and a foaming agent for stirring and size mixing, then feeding into a mechanical stirring type flotation machine, conducting reverse flotation roughing operation, and obtaining reverse flotation roughing concentrate and reverse flotation tailings; adding a certain amount of activating agent and collecting agent into the roughing concentrate, and then carrying out primary concentration to obtain reverse flotation final concentrate; and scavenging the roughing tailings twice, and obtaining final reverse flotation tailings. Compared with the prior art, the method has the advantages that by adding the composite inhibitor, the flotation effect is improved, the comprehensive iron ore concentrate grade is greater than 64%, the recovery rate is greater than 85%, and the recovery rate is increased by 3% or above under the condition that the grade is stable.

Description

technical field [0001] The invention belongs to the technical field of mineral processing engineering, and in particular relates to a compound inhibitor for reverse flotation of carbonate-containing iron ore, a preparation method and application. Background technique [0002] Carbonate-bearing iron ore is a kind of refractory iron ore with complex mineral composition and distribution relationship. At present, the "weak magnetic separation-strong magnetic separation-reverse flotation combined process" is usually used for this kind of complex refractory ore, but due to the Mohs hardness of iron dolomite, calcite, siderite and other carbonate minerals contained in the ore are relatively high Low, it is easy to muddy during the grinding process, and a large amount of fine mud minerals are dispersed in the pulp. Because these mineral particles have high specific surface area and surface energy, fine mud caps are produced during the flotation process, surface transformation and F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B03D1/02B03C1/30B03D101/06B03D103/04
CPCB03D1/018B03D1/025B03C1/30B03D2201/06B03D2203/04Y02P10/20
Inventor 苏兴国李文博杨光刘杰胡旭吕慧
Owner ANSTEEL GRP MINING CO LTD
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