System for performing iron removal on iron-containing solution

A solution and solution supply technology, applied in the chemical and metallurgical fields, to achieve the effect of improving the recovery rate, improving the iron removal efficiency and equipment utilization rate, and solving the problems of land occupation and environmental pollution

Active Publication Date: 2014-08-27
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, an object of the present invention is to propose a system for removing iron from iron-containing solutions, which can effectively solve production interruptions caused by problems such as scaling, ensure continuous and stable production, and significantly impr

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  • System for performing iron removal on iron-containing solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] According to the method for removing iron from iron-containing solution according to the embodiment of the present invention, iron-containing nickel sulfate solution is processed:

[0062] at 1m 3 vertical reactor and 3m 3 In a horizontal reactor, at 1m 3 The flow rate of / h is added to the iron-containing solution, the solution contains 60g / L of nickel and 25g / L of iron (as Fe 2+ meter), the pH value is 2.5, and the reaction temperature is maintained at 190°C. The iron-precipitated solution is flashed, filtered and washed to obtain iron-containing products (precipitation) and iron-precipitated liquid (filtrate), and the iron-precipitated liquid is returned to the system for circulation use.

[0063] The iron-containing product is determined to contain 60-68% iron, <0.3% nickel and <1% sulfur, which can be sold as cement or iron ore or further produced as iron red products.

Embodiment 2

[0065] According to the method for removing iron from iron-containing solution according to the embodiment of the present invention, iron-containing copper sulfate solution is processed:

[0066] at 1m 3 vertical reactor and 3m 3 In a horizontal reactor, at 1m 3 Add the iron-containing solution at a flow rate of / h, the solution contains 50g / L of copper and 30g / L of iron (as Fe 2+ meter), the pH value is 2.5, and the reaction temperature is maintained at 190°C. The iron-precipitated solution is flashed, filtered and washed to obtain iron-containing products (precipitation) and iron-precipitated liquid (filtrate), and the iron-precipitated liquid is returned to the system for circulation use.

[0067] The iron-containing product is determined to contain 60-68% of iron, <0.2% of copper and <1% of sulfur, which can be sold as cement or iron ore or further produced into iron red products.

Embodiment 3

[0069] According to the method for removing iron from iron-containing solution according to the embodiment of the present invention, iron-containing cobalt sulfate solution is processed:

[0070] at 1m 3 vertical reactor and 3m 3 In a horizontal reactor, at 1m 3 The flow rate of / h is added to the iron-containing solution, the solution contains 30g / L of cobalt and 35g / L of iron (as Fe 2+ meter), the pH value is 2.5, and the reaction temperature is maintained at 190°C. The iron-precipitated solution is flashed, filtered and washed to obtain iron-containing products (precipitation) and iron-precipitated liquid (filtrate), and the iron-precipitated liquid is returned to the system for circulation use.

[0071] It is determined that the iron-containing product contains 60-68% iron, cobalt <0.2%, and sulfur <1%, which can be sold as cement or iron ore or further produced into iron red products.

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Abstract

The invention discloses a system for performing iron removal on an iron-containing solution. The system comprises a vertical reaction kettle and a horizontal reaction kettle, wherein the vertical reaction kettle comprises a vertical reaction kettle body, an iron-containing solution feeding port, a first steam inlet and a first oxygen inlet; the horizontal reaction kettle comprises a horizontal reaction kettle body, a first iron-removed slurry feeding port, a second steam inlet and a second oxygen inlet; the iron-containing solution is an iron-containing sulfate solution, preferably, the iron-containing solution is at least one selected from a ferrous sulfate solution, an iron-containing nickel sulfate solution, an iron-containing cobalt sulfate solution and an iron-containing copper sulfate solution. According to the system for iron removal of the iron-containing solution disclosed by the embodiment of the invention, the vertical reaction kettle and the horizontal reaction kettle are combined for use so as to effectively solve the production interruption caused by the problems of scaling in the kettles in the iron removal process and ensure the continuous and stable operation of production, thereby significantly improving the iron removal efficiency and the equipment utilization rate.

Description

technical field [0001] The invention belongs to the field of chemical industry and metallurgy, in particular, the invention relates to a system for removing iron from iron-containing solution. Background technique [0002] Iron usually enters the solution in the form of impurities in the wet smelting process of nickel, copper, and cobalt. In order to obtain relatively pure nickel, copper, and cobalt products, the iron in the solution is precipitated and removed before the product recovery process during the smelting process. , the commonly used methods are neutralization method, vitriol method, goethite method and iron oxide method, wherein neutralization method, vitriol method and goethite method have low iron content in the iron slag, and the iron slag usually enters the tail Stockpiling in ore warehouses, the products obtained by the iron oxidation method can be used as raw materials for cement and ironmaking or to produce iron red products due to their high iron content,...

Claims

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Application Information

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IPC IPC(8): C22B3/44C22B3/02
CPCY02P10/20
Inventor 李少龙周凤娟丁淑荣张晓涛董爱国吴筱才超王晓丹
Owner CHINA ENFI ENGINEERING CORPORATION
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