Method and device for recovering polymetallic nodules

A polymetallic nodule and recovery method technology, which is applied in the field of polymetallic nodule recovery, can solve the problems of large consumption of leaching agents, low metal extraction rate, complicated purification of leaching solution, etc., to solve high acid consumption costs and reduce acid costs , Improve the effect of main metal extraction rate

Active Publication Date: 2022-07-12
CHINA ENFI ENGINEERING CORPORATION
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the above problems, the purpose of the present invention is to provide a recovery method and device for polymetallic nodules, to solve the problems of large consumption of leaching agents, complex purification of immersion solution, low metal extraction rate, etc. question

Method used

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  • Method and device for recovering polymetallic nodules
  • Method and device for recovering polymetallic nodules
  • Method and device for recovering polymetallic nodules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0113] The chemical compositions of typical deep-sea polymetallic nodules are shown in Table 1.

[0114] element Mn Fe Ni Cu Co CaO content / % 21.75 10.78 1.34 1.54 0.24 1.57 element SiO 2

MgO Al 2 O 3

Na 2 O

K 2 O

P content / % 15.71 3.45 4.67 2.24 1.25 0.12

[0115] Table 1

[0116] The anolyte is an organic wastewater solution with high Cl content, and Cl in the wastewater - The concentration ratio is 5%.

[0117] The cathodic electrolysis chamber and the anodic electrolysis chamber are composed of Cl - Anions are separated by a membrane.

[0118] The deep-sea polymetallic nodules are finely ground to -0.074mm, accounting for 70%, and then added to the two electrode spaces in the cathode electrolysis chamber. The cathode electrode plate is a graphite felt conductive electrode, and the cathode electrolysis chamber is filled with a plurality of parallel electrodes of graphite felt electrodes and...

Embodiment example 2

[0122] The chemical compositions of typical deep-sea cobalt-rich crusts are shown in Table 2.

[0123]

[0124]

[0125] Table 2

[0126] The anolyte is seawater that has been evaporated and concentrated by 1 times, in which Cl - The concentration ratio is 3.5%.

[0127] The cathodic electrolysis chamber and the anodic electrolysis chamber are composed of Cl - Anions are separated by a membrane.

[0128] The deep-sea cobalt-rich crusts are finely ground to -0.074mm, accounting for 65%, and then added to the two electrode spaces in the cathode electrolysis chamber. The cathode electrolysis chamber is equipped with a stirring device for stirring reduction and leaching, and the cathode and the anode are connected by a constant potential electrolysis device. The electrode plate of the electrolysis chamber is a graphite plate, the control voltage cathode reduction and leaching potential is -1.5V, and the current density in the process is between 30 ~ 50mA / cm 2 , the liqui...

Embodiment example 3

[0131] The chemical compositions of typical terrestrial cobalt-manganese polymetallic ores are shown in Table 3.

[0132] element Mn Fe Co Ni P content / % 27.12 16.55 0.12 0.22 0.51

[0133] table 3

[0134] Anolyte is wastewater with high organic concentration, in which COD cr The concentration is 20g / L, mainly bromine-containing aldehydes and phenolic organic pollutants.

[0135] The manganese-cobalt polymetallic oxide ore is finely ground to -0.074mm, accounting for 70%, and then added to the two electrode spaces in the cathode electrolysis chamber. The cathode electrolysis chamber is equipped with a stirring device for stirring reduction and leaching, and the cathode and the anode are connected by a constant potential electrolysis device. The electrode plate of the cathode electrolysis chamber is made of stainless steel mesh, the control voltage cathode reduction and leaching potential is -2.0V, and the current density in the process is be...

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Abstract

The invention provides a method and device for recovering polymetallic nodules, comprising: selectively reducing and leaching raw materials of polymetallic nodules through a cathode electrolysis chamber to obtain leaching solutions of various metal elements and leaching slag containing iron; In the anion exchange membrane separating the cathodic electrolysis chamber and the anodic electrolysis chamber, the active anions in the solution are exchanged into the anodic electrolysis chamber; the active anions are used in the anodic electrolysis chamber to extract the active species of the synthetic acid; the active species of the acid are processed After acid treatment, it is introduced into the cathodic electrolysis chamber to perform selective reduction and leaching of the polymetallic nodule raw materials in the cathodic electrolysis chamber again to form an acid cycle; It is separated and recovered from the iron-containing leaching slag. The invention can solve the problems of large consumption of leaching agent, complicated purification of leaching solution, low metal extraction rate and the like in the current wet method for recovering polymetallic nodules.

Description

technical field [0001] The invention relates to the technical field of electrochemical hydrometallurgy of polymetallic nodules, and more particularly, to a method and device for recovering polymetallic nodules. Background technique [0002] The treasure house of marine resources contains huge mineral resources to be developed, such as coastal sand deposits in shallow coastal zones, oil, natural gas and natural gas hydrates on continental shelves and continental slopes, and hydrothermal sulfides in marine basins. Among them, rich polymetallic minerals are bred in the seabed area. However, such metal resources have not been fully recognized and exploited, including polymetallic nodules that are rich in strategic metals such as nickel, copper, cobalt and manganese with great economic development potential. Limited to seabed exploration, mining and beneficiation technologies. Therefore, the improvement of beneficiation and metallurgy technology is an important way to break thro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/06C22B3/08C22B3/10
CPCC22B3/045C22B3/08C22B3/10C22B3/065Y02P10/20
Inventor 康金星宋磊王鑫于传兵吕东郭素红王传龙刘志国王亚运
Owner CHINA ENFI ENGINEERING CORPORATION
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