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A method for efficiently removing iron in solution

A removal and solution technology, which is applied in the field of self-balancing redox catalytic goethite method, can solve the problems of long iron removal process, high energy consumption and comprehensive cost, and low efficiency, and achieve fast reaction speed, easy control and operation simple effect

Active Publication Date: 2015-11-25
刘国燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional goethite method removes iron in the solution, the iron removal process is long, the efficiency is low, and the energy consumption and overall cost are high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Example 1 Iron removal solution (L01) 800mL, the solution contains 80g / L of total iron, including 57g / L of ferrous iron and 23g / L of ferric iron, put it into a 1000mL tall beaker, control the temperature at 80°C, and let in air (The flow rate is 1.2L / min), and then add reducing agent and regulator: copper powder 50g, copper oxide powder 55.3g, iron powder 20g. The addition of reducing agent and regulator should be completed within 120 minutes after the start of the reaction. The reaction was carried out for 180 minutes with stirring. During the reaction process, the pH value of the solution is self-balanced at about 3.5±0.5. Filter, get solution sample and analyze, solution contains iron 0.05mg / L, promptly solution contains iron 0.05PPm, and the iron in the solution has been removed; Get filter residue analysis, filter residue contains iron 56.9%.

example 2

[0026]Example 2 800mL of iron solution to be removed (L01), containing 80g / L of total iron, 57g / L of ferrous iron and 23g / L of ferric iron, was added to a 1000mL tall beaker (SB01). Control the temperature at 80°C, feed oxygen (flow rate: 0.5L / min), and then add reducing agent and regulator: copper powder 30g, zinc oxide (ZnO) powder 50g, copper oxide (CuO) powder 57.2g. The addition of reducing agent and regulator should be completed within 60 minutes after the reaction starts. Continue to add oxidant (oxygen in the air) during the whole process of the reaction: pump the solution in the beaker (SB01) to the air atomizing nozzle, then return to the beaker (SB01), and react for 90 minutes under stirring . During the reaction process, the pH value of the solution is self-balanced at about 4.0±1.0. Filter, get solution sample and analyze, solution contains iron 0.03mg / L, promptly solution contains iron 0.03PPm, and the iron in the solution has been removed; Get filter residue a...

example 3

[0027] Example 3 800mL of the iron solution to be removed (L03), containing 20g / L of total iron, including 12g / L of ferrous iron and 8g / L of ferric iron, was added to a 1000mL tall beaker, the temperature was controlled at 80°C, and air was introduced (flow rate is 1.5L / min), then add regulator: iron powder 5g, iron oxide (FeO) powder 20g, zinc oxide (ZnO) powder 29.2g, the addition of regulator should be added after reaction starts 30 minutes, in The reaction was carried out for 45 minutes with stirring. During the reaction process, the pH value of the solution is self-balanced at about 4.0±1.0. Filter, get the solution sample and analyze, the solution contains iron 0.02mg / L, namely the solution contains iron 0.02PPm, and the iron in the solution has been removed; get the filter residue analysis, the filter residue contains 58.7% iron.

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Abstract

The invention discloses a method for efficiently removing iron in a solution. The method comprises the following steps of: adding an iron-to-be-removed solution into a specially-designed reaction tank, and controlling the temperature of the reaction tank between 45 DEG C and 98 DEG C; adding an oxidant, a reductant and a regulator according to the property of the iron-to-be-removed solution to establish a self-balance catalytic reaction system, wherein the oxidant, the reductant and the regulator meet the condition for the self-balance catalytic reaction system; and meanwhile, introducing air or oxygen-enriched air or oxygen to enable iron in the iron-to-be-removed solution to rapidly generate needle ironstone under the condition of mechanical stirring until the iron in the iron-to-be-removed solution is completely removed. The method is simple, stable and reliable in technological process, low in cost and high in reaction speed and efficiency; the iron concentration of the iron-removed solution is low; and the particle size of the separated needle ironstone is easy to control.

Description

technical field [0001] The invention relates to a method for efficiently removing iron in a solution, in particular to a self-balanced oxidation-reduction catalytic goethite method. Background technique [0002] The problem of removing iron from iron-containing solutions generally exists in metallurgy, chemical industry, materials and other industries to achieve the purpose of purifying the solution. The so-called removal of iron in the solution means that the iron in the solution (Fe 2+ , Fe 3+ ) to generate insoluble salts or oxides, and then separate the iron through solid-liquid separation to purify the solution. Taking the extraction of non-ferrous metals as an example, non-ferrous metal ores are usually associated with iron compounds. During the leaching or extraction process, iron inevitably enters the leaching solution or extraction solution. In order to obtain high-quality metal products and good technical and economic indicators, it is necessary to Firstly, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/44
CPCY02P10/234Y02P10/20
Inventor 刘国燕
Owner 刘国燕
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