Mixed ammonia leaching method for multi-metal concretion and cobalt-rich skull in deep sea

A technology for polymetallic nodules and cobalt-rich crusts is applied in the direction of improving process efficiency, which can solve the problems of high cost, low cobalt recovery rate, and impact on process economic benefits, and achieve the effect of reducing carbon monoxide consumption.

Active Publication Date: 2006-05-24
BEIJING GENERAL RES INST OF MINING & METALLURGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

One is that the copper content in the cobalt-rich crust is very low, only about 0.1%, and it cannot provide enough copper catalyst for reduction leaching. The copper required for catalysis is almost all provided by the outside, and the cost is high; the second is that the recovery rate of cobalt is low, The cobalt content in cobalt-rich crusts is 2-4 times or higher than that of polymetallic nodules, and the cobalt leaching rate has a significant impact on the economic benefits of the process

Method used

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  • Mixed ammonia leaching method for multi-metal concretion and cobalt-rich skull in deep sea

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Take 3g of polymetallic nodules-1 and 3g of cobalt-rich crusts, grind them to -0.074mm and account for 70.76%, mix them and add them to 120g / l NH 3 , 40g / l SO 4 2- , 3g / l Co 2+ , 11.3g / l Ni 2+ , 8g / l Cu + In the ammonia-ammonium sulfate solution, the liquid-solid weight ratio is 40:1, the leaching temperature is 45°C, and the carbon monoxide flow rate is 0.4m 3 / t nodules·min, leaching for 2h. The leaching rate of cobalt is 90.75%.

Embodiment 2

[0046] Take 6g of polymetallic nodules-2 and 3g of cobalt-rich crusts, mix them, grind them to -0.074mm, account for 84.76%, add them to 60g / l NH 3 , 96g / l SO 4 2- , 2.5g / l Co 2+ , 8.6g / l Ni 2+ , 10g / l Cu + In the ammonia-ammonium sulfate solution, the liquid-solid weight ratio is 30:1, the leaching temperature is 40°C, and the carbon monoxide flow rate is 0.8m 3 / t·min, leaching for 3h. The leaching rate of cobalt is 88.5%.

Embodiment 3

[0048] Take 9g of polymetallic nodules-1 and 3g of cobalt-rich crusts, grind them to -0.074mm respectively, accounting for 70%, mix them and add them to 100g / lNH 3 , 40g / l SO 4 2- , 3g / l Co 2+ , 11.3g / l Ni 2+ , 15g / l Cu + In the ammonia-ammonium sulfate solution, the liquid-solid weight ratio is 20:1, the leaching temperature is 70°C, and the carbon monoxide flow rate is 1.2m 3 / t·min, leaching for 4h. The leaching rate of cobalt is 90.75%.

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Abstract

The invention relates to a mixture ammonia leaching method of deep sea multi-metal nodule and cobalt-bearing crust that the process includes the following steps: mixing, crashing, grinding the multi-metal nodule and cobalt-bearing crust; adding the material into ammonia salt solution and adding carbon monoxide to take reducing leaching out; concentrating and separating, the supernatant returning to leaching out and the underset taking filtering to gain leaching out liquid A; washing filtered cake to gain the wash water B with nickel, copper, cobalt, molybdenum; mixing the leaching liquid A and wash water B adding air to take oxidizing, filtering to gain deposit C and solution D that contains nickel, copper, cobalt, and molybdenum; deposit C returning to leach, recycling nickel, copper, cobalt; recycling the valued metal in solution D. The invention could make the cuprous ion concentration stable from the copper leaching itself.

Description

technical field [0001] A mixed ammonia leaching method for deep-sea polymetallic nodules and cobalt-rich crusts, relating to a hydrometallurgical method for extracting nickel, copper, and cobalt from deep-sea polymetallic nodules and cobalt-rich crusts. Method for mixed treatment of polymetallic nodules and cobalt-rich crusts. Background technique [0002] The international seabed area is extremely rich in metal ore resources. It is a common heritage of mankind and an important strategic resource base in the 21st century. With the continuous expansion of the global economy and the depletion of land resources, the development of deep-sea resources is expected to become an important industry in the 21st century. [0003] Oceanic polymetallic nodules and cobalt-rich crusts are the two most important deep-sea polymetallic deposits currently known. Polymetallic nodules, also known as manganese nodules or ferromanganese nodules, are widely distributed in the surface layer of seab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B3/14C22B3/20
CPCY02P10/20
Inventor 蒋开喜蒋训雄汪胜东范艳青
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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