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Carbonate recovery method and system using steel slag

A recovery method and carbonate technology, applied in the direction of carbonate/acid carbonate preparation, separation method, recycling technology, etc., can solve problems that have not yet been developed, reduce the amount of waste, improve The effect of extraction efficiency

Active Publication Date: 2021-09-21
DOOSAN HEAVY IND & CONSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Various technologies for utilizing such steel slag are being developed. As shown in Korean Registered Patent No. 10-1487977, a method for recovering Fe in steel slag is described, and as shown in Korean Registered Patent No. 10-1175422, a method for Valuable metal recovery method in slag, but this is about the recovery of Fe components in steel slag, and the technology for the recovery of the remaining components has not yet been developed

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  • Carbonate recovery method and system using steel slag
  • Carbonate recovery method and system using steel slag
  • Carbonate recovery method and system using steel slag

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Embodiment Construction

[0055] The method and system for recovering carbonates using steel slag according to the present invention will be described below with reference to the accompanying drawings.

[0056] figure 1 It is a sequence diagram of a carbonate recovery method utilizing steel slag in an embodiment of the present invention, including: 1) a step (S100) of mixing steel slag and an acidic solvent to produce a first mixture; A step of separating a mixture into a second mixture and a residue (S200); 3) a step of adding a ligand to the second mixture of the above-mentioned step 2) and mixing to produce a third mixture (S300); 4) separating the above-mentioned step 3 ) the step (S400) of the complex contained in the third mixture; 5) making the separated complex with CO 2 The steps of reaction; and 6) pair with CO 2 The step of separating the carbonate formed by the reaction (S500). The recovery method of above-mentioned carbonate is examined step by step below.

[0057] The above step 1) is...

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Abstract

The present invention relates to a method and system for recovering carbonates using steel slag, which can extract carbonates from steel slag and reuse them as carbonates, and can reuse steel slag without reusing CO 2 The gas is discharged into the atmosphere and can be reused. In the steel slag treatment method and its system, since unreacted metal ions and acidic solvents are reused, the extraction efficiency of carbonate minerals can be improved and the amount of waste can be reduced.

Description

technical field [0001] The present invention relates to a method and a system for recovering carbonates from steel slag, and more specifically, to a method for extracting metal ions contained in steel slag and recovering the extracted metal ions in the form of carbonates and a system thereof . Background technique [0002] Slag is an inevitable product in the iron and steel smelting process. In the process of ironmaking, slag is inevitably generated due to the coal gangue components of iron ore or coke. In the process of steelmaking, slag is formed due to oxides generated during the oxidation and deoxidation of molten iron or molten steel or auxiliary materials added for refining purposes. etc. will inevitably be generated. [0003] In iron and steel plants, as industrial by-products, the production of blast furnace slag and steel slag increases sharply year by year, but compared with the production, the development and application of these by-products is far from enough, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/60C01F11/18
CPCC01F11/18Y02A20/124B01D35/02B01D61/44C21C2200/00Y02W30/50
Inventor 友将勇孔嘉亨史康和金祐锡
Owner DOOSAN HEAVY IND & CONSTR CO LTD