Method for extracting valuable metal from submarine metallic ore

A technology of valuable metals and metal mines, which is applied in the field of metallurgy, can solve the problems of high raw material transportation costs, large carbon emissions, and high energy consumption, and achieve the goal of saving raw material transportation costs, zero carbon emissions, and low energy consumption Effect

Active Publication Date: 2013-06-05
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a resource-saving, low energy consumption, low pollution, and carbon emission Method for extracting valuable metals from seabed metal ores with zero, high reduction and leaching rates

Method used

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  • Method for extracting valuable metal from submarine metallic ore
  • Method for extracting valuable metal from submarine metallic ore
  • Method for extracting valuable metal from submarine metallic ore

Examples

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Effect test

Embodiment 1

[0024] a kind of like figure 1 Shown the present invention extracts the method for valuable metal from seabed metal ore, comprises the following steps:

[0025] (1) Coarse crushing and drying: coarsely crush oceanic polymetallic nodules (manganese nodules) to less than 30mm, and dry until the moisture content is <18%;

[0026] (2) Grinding: take 45g of dried polymetallic nodules and grind them to below 0.5mm, wherein particles below 0.1mm account for 60%;

[0027] (3) Hydrogen reduction: Add polymetallic nodule powder into a tubular resistance furnace (either horizontal fixed bed or gas-solid fluidized bed, the same below), and when heated to 300°C, N 2 , H was introduced at 390°C 2 And maintain the reduction at 390°C for 60min. N 2 and H 2 Ratio 1:1 (volume ratio), N 2 and H 2 The flow rate is controlled at 15m respectively 3 / t material min; after reduction in N 2 Cool down to below 150°C under protection and release from the furnace to obtain 33g of discharged mate...

Embodiment 2

[0031] A method for extracting valuable metals from seabed metal ore of the present invention comprises the following steps:

[0032] (1) Coarse crushing and drying: coarsely crush oceanic polymetallic nodules (manganese nodules) to less than 30mm, and dry until the moisture content is <18%;

[0033] (2) Grinding: take 45g of dried polymetallic nodules and grind them to below 0.5mm, wherein particles below 0.1mm account for 60%;

[0034] (3) Hydrogen reduction: Add the polymetallic nodule powder into the tubular resistance furnace, and feed N to 300°C. 2 , H was introduced at 450°C 2 and maintained at 450°C for 30min, N 2 and H 2 Ratio 1:4 (volume ratio), N 2 and H 2 The flow rate is controlled at 10m respectively 3 / t material min and 45m 3 / t material min, after reduction in N2 Cool down to below 150°C under protection and release from the furnace to obtain 32.7g of discharged material;

[0035] (4) Acid leaching: Take 25g of the reduced discharge and add it to the s...

Embodiment 3

[0041] A method for extracting valuable metals from seabed metal ore of the present invention comprises the following steps:

[0042] (1) Coarse crushing and drying: coarsely crush oceanic polymetallic nodules (manganese nodules) to less than 30mm, and dry until the moisture content is <15%;

[0043] (2) Grinding: take 45g of dried polymetallic nodules and grind them to below 0.5mm, wherein particles below 0.1mm account for 60%;

[0044] (3) Hydrogen reduction: Add the polymetallic nodule powder into the tubular resistance furnace, and feed N to 300°C. 2 , H was introduced at 420°C 2 and maintained at 420°C for 30min, N 2 and H 2 Ratio 2:1 (volume ratio), N 2 and H 2 The flow rate is controlled at 10m respectively 3 / t material min and 5m 3 / t material min; after reduction in N 2 Cool down to below 150°C under protection and release from the furnace to obtain 32.8g of discharged material;

[0045] (4) Acid leaching: Take 25g of the reduced material and add it to the s...

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Abstract

The invention discloses a method for extracting valuable metal from submarine metallic ore, which comprises the following steps: coarsely crushing submarine metallic ore, drying the coarsely crushed ore materials; levigating the dried ore materials to obtain ore powder; placing the ore powder in a reaction bed, injecting hydrogen under a heating condition to perform a reduction reaction; adding the reduced discharged material into an acid solution for acid leaching; concentrating the leached ore pulp after acid leaching, collecting the supernatant, performing pressure filtration of the concentrated underflow, combining the filtrate and the supernatant, removing impurities, extracting, and recovering valuable metal by an electrodeposition method. The method of the invention has the advantages of resource saving, low energy consumption, low pollution, zero carbon discharge capacity, high reduction and leaching rates, and the like.

Description

technical field [0001] The invention belongs to the field of metallurgical metals, and in particular relates to a combined pyro-hydrometallurgy method from metal ore. Background technique [0002] Oceanic polymetallic nodules and cobalt-rich crusts are huge seabed metal mineral resources shared by mankind. In the international seabed area (the total area is about 251.7 billion km 2 , accounting for 49% of the total area of ​​the earth) The 4km-6km seabed sediment surface layer is rich in polymetallic nodules, with a total resource of 3 trillion tons and 75 billion tons of resources with commercial mining value, of which nickel The average contents of , cobalt, copper and manganese are 1.3%, 0.22%, 2% and 25% respectively, and their resources are several times to thousands of times the corresponding resources on land. Cobalt-rich crusts occur in the bedrock surface of seamounts and sea slopes at a depth of 800m to 4000m on the seabed. The average content of cobalt is 0.8% t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B5/12C22B3/06C22B5/14
CPCY02P10/20
Inventor 丁喻陈文如钟祥沈裕军彭俊
Owner CHANGSHA RES INST OF MINING & METALLURGY
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