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Hydrometallurgical method for comprehensively recycling components in lateritic nickel ore as products

A technology of laterite nickel ore and hydrometallurgy, applied in the direction of improving process efficiency, can solve problems such as land occupation, environmental pollution, waste of resources, etc., and achieve the effects of cost saving, cost reduction and product quality improvement.

Inactive Publication Date: 2011-10-26
王钧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only causes a great waste of resources, but also occupies a large amount of land, and poses a potential threat to the environment, which has become an urgent problem to be solved at home and abroad.
For this reason, the present invention proposes a hydrometallurgical method for comprehensively recycling laterite nickel ore, basically realizing the goal of no three wastes and zero discharge, and solving the problems of high cost and serious environmental pollution in the existing laterite nickel ore hydrometallurgy

Method used

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  • Hydrometallurgical method for comprehensively recycling components in lateritic nickel ore as products
  • Hydrometallurgical method for comprehensively recycling components in lateritic nickel ore as products
  • Hydrometallurgical method for comprehensively recycling components in lateritic nickel ore as products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 2 kg of laterite nickel ore, ground to more than 100 mesh, the main components and contents of this raw material are shown in Table 1.

[0022] Table 1 Each component and content (%) of laterite nickel ore

[0023] components

Ni

co

MgO

Fe

SiO 2

CaO

Cr 2 o 3

rare earth

MoO 3

content

1.21

0.009

27.6

9.1

43.4

0.21

0.20

0.019

0.032

[0024] The liquid-solid ratio is 2:1, and the leaching conditions are shown in Table 2. 4dm 3 water for leaching, add concentrated sulfuric acid 1.6kg, NH 4 Cl 0.001kg, the leaching temperature is 35-50°C, and the leaching pressure of the high-pressure pipeline is 30Mpa / cm 2 , after leaching for 6 hours, separate the leaching solution and leaching residue, wash and filter.

[0025] Table 2 Leaching conditions

[0026]

[0027] The leaching results are shown in Table 3. Under the leaching conditions described in Table 2, Ni, Co...

Embodiment 2

[0036] 2 kg of laterite nickel ore, ground to more than 80 meshes, the main components and contents of the raw materials are shown in Table 5.

[0037] Table 5 laterite nickel ore ore composition and content (%)

[0038] Ni

co

MgO

SiO 2

Fe

1.9

0.065

14.3

28.7

16.3

[0039] The liquid-solid ratio is 2:1, and the leaching conditions are shown in Table 6. The 2kg raw material adopts the waste water 4dm of Example 1 3 For leaching, add 2.4kg of concentrated sulfuric acid, NH 4 Cl 0.1kg, the leaching temperature is 40-55°C, and the leaching pressure of the high-pressure pipeline is 35Mpa / cm 2 , after leaching for 6 hours, separate the leaching solution and leaching residue, wash and filter. In the leaching process of this embodiment, the waste water of Embodiment 1 is used for recycling, so the complexing agent NH 4 The amount of Cl can be greatly reduced, and there is no need to add water as the leaching solution. ...

Embodiment 3

[0046] 6 kg of laterite nickel ore, ground to more than 80 meshes, the main components and contents of the raw materials are shown in Table 8.

[0047] Table 8 lateritic nickel ore raw ore composition and content (%)

[0048] Ni

co

SiO 2

Fe

MgO

1.5

0.25

15.2

37.8

6.4

[0049] Liquid-solid ratio is 2: 1, and leaching condition is as table 9, has adopted the waste water 4dm in the embodiment two in this example 3 As a leachate, so no need to add water, in the production process, the complexing agent NH 4 The loss of Cl is very small, so only 0.1kg of NH needs to be added 4 Cl is enough. The leaching results are shown in Table 10.

[0050] Table 9 Leaching Conditions

[0051]

[0052] Table 10 Leaching Results

[0053]

[0054] The leaching solution after filtering and washing is adjusted to pH=2.0±0.2 with raw ore, the nickel concentration in the first leaching solution is 6.6g / L, and the Co is 1.1g / L, whi...

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Abstract

The invention relates to a hydrometallurgical method for comprehensively recycling components in lateritic nickel ore as products, belonging to the fields of hydrometallurgy and environmental protection. In order to solve the principal problems in environmental protection in the existing technique for hydrometallurgically producing electrolytic nickel and comprehensively recycling cobalt by using lateritic nickel ore as the raw material, such as massive waste water, waste residue and waste gas, the invention provides a new hydrometallurgical method for lateritic nickel ore. Strong acid and high-pressure pipelines are mainly used for leaching the raw material, thereby increasing the leaching rate of various valuable components in the raw material; a complexing agent is added, so that sparse and scarce rare-earths, noble metals or other valuable components in the raw material are effectively leached into the solution; the waste residue subjected to reinforced leaching can achieve the standard for raw materials of building materials; and the leaching solution and waste water are recycled, so that no waste water is discharged in the whole process, thereby basically implementing comprehensive recycling of the raw material and no discharge of three wastes.

Description

technical field [0001] The present invention relates to a method for comprehensively and comprehensively recovering various components of laterite nickel ore, and specifically relates to adopting a hydrometallurgical method to comprehensively and comprehensively recover various components of laterite nickel ore into commercial products, and basically achieves no three wastes and zero discharge, which belongs to the wet method metallurgy and environmental protection. Background technique [0002] Divided according to geological origin, there are two main types of nickel deposits: magmatic nickel sulfide ore and weathered laterite nickel deposit, of which the reserves of laterite nickel ore resources account for 72% of the world's nickel resources. In recent years, driven by the stainless steel industry, the demand for nickel in the world has continued to rise. In 2008, my country's stainless steel production capacity reached 10 million tons, but the actual output was only 5.3...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B23/00C22B26/22
CPCC22B3/20C22B23/0415C22B23/0453Y02P10/20
Inventor 王钧徐进勇王秀珍
Owner 王钧