CN107151739B - A kind of full leaching method of nitric acid of the high iron alloy powder of low nickel - Google Patents
A kind of full leaching method of nitric acid of the high iron alloy powder of low nickel Download PDFInfo
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- CN107151739B CN107151739B CN201710553021.XA CN201710553021A CN107151739B CN 107151739 B CN107151739 B CN 107151739B CN 201710553021 A CN201710553021 A CN 201710553021A CN 107151739 B CN107151739 B CN 107151739B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/065—Nitric acids or salts thereof
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
- C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
- C22B23/0438—Nitric acids or salts thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of full leaching methods of nitric acid of low high iron alloy powder of nickel, the high iron alloy powder of low nickel is used one section of concentrated nitric acid to leach first and obtains one section of leachate and one section of leached mud by this method, one section of leachate enters iron removal step processing recycling nickel cobalt valuable metal, one section of leached mud continuously adds concentrated nitric acid and carries out two sections of leachings, magnetic separation is carried out after leaching, magnetic concentrate returns to one section of leaching, ore pulp carries out solid-liquor separation and obtains two sections of leachates and two sections of leached muds, two sections of leachates return to one section of leaching process, and two sections of leached muds are as leaching finishing slag outlet.The present invention, which handles the low high iron alloy powder of nickel by two sections of counterflow leachings of nitric acid, can reduce total 20% or more acid amount compared to single-stage leaching, ore pulp after leaching simultaneously to two sections carries out magnetic separation, the metalliferous material not reacted completely can be separated, it returns and leaches process, further improve nickel cobalt leaching rate, nickel cobalt leaching rate can reach 98% or more, and can guarantee that outlet leaches the nickeliferous < 0.3% of finishing slag, iron < 6%.
Description
Technical field
The invention belongs to non-ferrous metal technical field of wet metallurgy, and in particular to a kind of nitric acid of the low high iron alloy powder of nickel is complete
Leaching method.
Background technique
Lateritic nickel ore use RKEF smelting process output thick ferronickel, be the high iron alloy powder of low nickel, composition 2%-8%Ni,
50%-68%Fe、0.08%-0.3%Co、0.1%-0.6%Mn、3%-10%Mg、0.3%-1.0%Al、1.0%-2.8%Cr、3%-10%Si。
The ferronickel powder mainly directly applies to the production of stainless steel, in the process nickel can only as low-end product application, and cobalt with
Nickel enters stainless steel, causes a large amount of losses of cobalt, does not embody the value of cobalt.Each metal is mainly with simple substance in the thick ferronickel powder
Or alloy form exists, using traditional sulfuric acid leaching, nickel cobalt leaching rate 50% hereinafter, and a large amount of iron in the form of ferrous iron into
Entering solution causes the next step difficult except iron；Potassium cloride ferronickel cobalt leaching rate can reach 95% or so, but remove iron cost
It is high.
Summary of the invention
The purpose of the present invention is to solve the technical problems existing in the prior art, provide a kind of nickel, cobalt leaching rate it is high,
The full leaching method of nitric acid that is environmentally protective, being easy to the subsequent high iron alloy powder of low nickel except iron.
In order to achieve the above object, the invention adopts the following technical scheme: a kind of nitric acid of the high iron alloy powder of low nickel soaks entirely
Method, method includes the following steps:
A) one section of leaching: being added concentrated nitric acid in the high iron alloy powder of low nickel, and the additional amount of concentrated nitric acid is that 0.3-1.2t/t is low
The high iron alloy powder of nickel, adding diluent control liquid-solid ratio is 7-10:1, and extraction temperature is 75 DEG C -105 DEG C, and extraction time is
4h-8h recycles NO in leaching processx, solid-liquor separation obtains one section of leachate and one section of leached mud, one section of leaching after leaching
Liquid enters iron removal step processing recycling nickel cobalt valuable metal；
B) two sections of leachings: being added concentrated nitric acid in one section of leached mud, and the additional amount of concentrated nitric acid is that the low nickel of 1.7-2.8t/t is high
Iron alloy powder, adding diluent control liquid-solid ratio is 7-10:1, and extraction temperature is 75 DEG C -105 DEG C, extraction time 4h-8h,
NO is recycled in leaching processx, magnetic separation is carried out after leaching, the magnetic concentrate selected returns to one section of leaching, pulp liquid-solid isolation
Obtain two sections of leachates and two sections of leached muds；
C) as finishing slag outlet is leached, two sections of leachates return to one section of leaching process to be made two sections of leached muds as diluent
With.
Further, the granularity of the low high iron alloy powder of nickel is 20 mesh or less in the step a).
Further, the step a), step b), concentrated nitric acid in step c) concentration be 69%.
The present invention has the advantages that the full leaching method of nitric acid of the low high iron alloy powder of nickel of the present invention compared with the prior art
The high iron alloy powder of low nickel is used one section of concentrated nitric acid to leach first and obtains one section of leachate and one section of leached mud, one section of leachate
Into iron removal step processing recycling nickel cobalt valuable metal, one section of leached mud continuously adds concentrated nitric acid and carries out two sections of leachings, leaches knot
Magnetic separation is carried out after beam, magnetic concentrate returns to one section of leaching, and ore pulp carries out solid-liquor separation and obtains two sections of leachates and two sections of leached muds,
Two sections of leachates return to one section of leaching process, carry out one section of leaching after supplementing concentrated nitric acid, two sections of leached muds, which are used as, to be leached outside finishing slag
Row.The present invention, which handles the low high iron alloy powder of nickel by two sections of counterflow leachings of nitric acid, can reduce total acid amount 20% compared to single-stage leaching
More than, while magnetic separation is carried out to the ore pulp after two sections of leachings, the metalliferous material not reacted completely can be separated, return and leach
Process further improves nickel cobalt leaching rate, and nickel cobalt leaching rate can reach 98% or more, and it is nickeliferous to can guarantee that outlet leaches finishing slag
< 0.3%, iron < 6%.In addition, iron mainly enters solution with ferric form, be conducive to the removing in subsequent iron removal step to iron.
Detailed description of the invention
Fig. 1 is process flow diagram of the invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
Embodiment 1
The low high iron alloy powder composition of nickel is as shown in Table 1.
Table one: the low high iron alloy powder composition (%) of nickel
The full leaching method of nitric acid of the low high iron alloy powder of nickel the following steps are included:
A) one section of leaching: being that the concentrated nitric acid that concentration is 69% is added in the 20 mesh low high iron alloy powder of nickel below in granularity,
The additional amount of concentrated nitric acid is the high iron alloy powder of the low nickel of 0.6t/t, and adding diluent control liquid-solid ratio is 7:1, extraction temperature 95
DEG C, extraction time 4h recycles NO in leaching processx(mixture of NO and NO2), solid-liquor separation obtains one section after leaching
Leachate and one section of leached mud, one section of leachate enter iron removal step processing recycling nickel cobalt valuable metal.
B) two sections of leachings: being added the concentrated nitric acid that concentration is 69% in one section of leached mud, and the additional amount of concentrated nitric acid is 1.7t/
The high iron alloy powder of the low nickel of t, adding diluent control liquid-solid ratio is 7:1, and extraction temperature is 95 DEG C, extraction time 4h, is leached
NO is recycled in the processx(mixture of NO and NO2) carries out magnetic separation after leaching, and the magnetic concentrate selected returns to one section of leaching,
Pulp liquid-solid isolation obtains two sections of leachates and two sections of leached muds；
C) as finishing slag outlet is leached, two sections of leachates return to one section of leaching process to be made two sections of leached muds as diluent
With.
Leach result: nickel leaching rate 98.8%, cobalt leaching rate 98.6%, two sections of leached muds nickeliferous 0.28%, iron 5.84%.
Embodiment 2
The low high iron alloy powder composition of nickel is as shown in Table 2.
Table two: the low high iron alloy powder composition (%) of nickel
The full leaching method of nitric acid of the low high iron alloy powder of nickel the following steps are included:
A) one section of leaching: being that the concentrated nitric acid that concentration is 69% is added in the 20 mesh low high iron alloy powder of nickel below in granularity,
The additional amount of concentrated nitric acid is the high iron alloy powder of the low nickel of 0.3t/t, and adding diluent control liquid-solid ratio is 7:1, extraction temperature 75
DEG C, extraction time 6h recycles NO in leaching process2, solid-liquor separation obtains one section of leachate and one section of leached mud after leaching, and one
Section leachate enters iron removal step processing recycling nickel cobalt valuable metal；
B) two sections of leachings: being added the concentrated nitric acid that concentration is 69% in one section of leached mud, and the additional amount of concentrated nitric acid is 2.0t/
The high iron alloy powder of the low nickel of t, adding diluent control liquid-solid ratio is 7:1, and extraction temperature is 75 DEG C, extraction time 6h, is leached
NO is recycled in the process2, magnetic separation is carried out after leaching, the magnetic concentrate selected returns to one section of leaching, and pulp liquid-solid isolation obtains
Two sections of leachates and two sections of leached muds；
C) as finishing slag outlet is leached, two sections of leachates return to one section of leaching process to be made two sections of leached muds as diluent
With.
Leach result: nickel leaching rate 98.6%, cobalt leaching rate 98.9%, two sections of leached muds nickeliferous 0.25%, iron 5.6%.
Embodiment 3
The low high iron alloy powder composition of nickel is as shown in Table 3.
Table three: the low high iron alloy powder composition (%) of nickel
The full leaching method of nitric acid of the low high iron alloy powder of nickel the following steps are included:
A) one section of leaching: being that the concentrated nitric acid that concentration is 69% is added in the 20 mesh low high iron alloy powder of nickel below in granularity,
The additional amount of concentrated nitric acid is the high iron alloy powder of the low nickel of 0.9t/t, and adding diluent control liquid-solid ratio is 10:1, and extraction temperature is
105 DEG C, extraction time 8h, NO is recycled in leaching process2, solid-liquor separation obtains one section of leachate and one section of leaching after leaching
Slag, one section of leachate enter iron removal step processing recycling nickel cobalt valuable metal；
B) two sections of leachings: being added the concentrated nitric acid that concentration is 69% in one section of leached mud, and the additional amount of concentrated nitric acid is 2.4t/
The high iron alloy powder of the low nickel of t, adding diluent control liquid-solid ratio is 10:1, and extraction temperature is 105 DEG C, extraction time 8h, leaching
NO is recycled during out2, magnetic separation is carried out after leaching, the magnetic concentrate selected returns to one section of leaching, and pulp liquid-solid isolation obtains
To two sections of leachates and two sections of leached muds；
C) as finishing slag outlet is leached, two sections of leachates return to one section of leaching process to be made two sections of leached muds as diluent
With.
Leach result: nickel leaching rate 98.8%, cobalt leaching rate 98.8%, two sections of leached muds nickeliferous 0.27%, iron 5.0%.
Embodiment 4
The low high iron alloy powder composition of nickel is as shown in Table 4.
Table four: the low high iron alloy powder composition (%) of nickel
The full leaching method of nitric acid of the low high iron alloy powder of nickel the following steps are included:
A) one section of leaching: being that the concentrated nitric acid that concentration is 69% is added in the 20 mesh low high iron alloy powder of nickel below in granularity,
The additional amount of concentrated nitric acid is the high iron alloy powder of the low nickel of 1.2t/t, and adding diluent control liquid-solid ratio is 9:1, extraction temperature 85
DEG C, extraction time 5h recycles NO in leaching process2, solid-liquor separation obtains one section of leachate and one section of leached mud after leaching, and one
Section leachate enters iron removal step processing recycling nickel cobalt valuable metal；
B) two sections of leachings: being added the concentrated nitric acid that concentration is 69% in one section of leached mud, and the additional amount of concentrated nitric acid is 2.8t/
The high iron alloy powder of the low nickel of t, adding diluent control liquid-solid ratio is 9:1, and extraction temperature is 85 DEG C, extraction time 5h, is leached
NO is recycled in the process2, magnetic separation is carried out after leaching, the magnetic concentrate selected returns to one section of leaching, and pulp liquid-solid isolation obtains
Two sections of leachates and two sections of leached muds；
C) as finishing slag outlet is leached, two sections of leachates return to one section of leaching process to be made two sections of leached muds as diluent
With.
Leach result: nickel leaching rate 98.6%, cobalt leaching rate 98.4%, two sections of leached muds nickeliferous 0.27%, iron 5.0%.
Claims (3)
1. a kind of full leaching method of nitric acid of the high iron alloy powder of low nickel, it is characterised in that method includes the following steps:
A) one section of leaching: being added concentrated nitric acid in the high iron alloy powder of low nickel, and the low high iron alloy powder composition of nickel is 2%-8%Ni, 50%-
68%Fe, 0.08%-0.3%Co, 0.1%-0.6%Mn, 3%-10%Mg, 0.3%-1.0%Al, 1.0%-2.8%Cr, 3%-10%Si, dense nitre
The additional amount of acid is the high iron alloy powder of the low nickel of 0.3-1.2t/t, and adding diluent control liquid-solid ratio is 7-10:1, extraction temperature
It is 75 DEG C -105 DEG C, extraction time 4h-8h, recycles NO in leaching processx, solid-liquor separation obtains one section of leaching after leaching
Liquid and one section of leached mud, one section of leachate enter iron removal step processing recycling nickel cobalt valuable metal；
B) two sections of leachings: being added concentrated nitric acid in one section of leached mud, and the additional amount of concentrated nitric acid is that the low nickel high-speed rail of 1.7-2.8t/t is closed
Bronze, adding diluent control liquid-solid ratio is 7-10:1, and extraction temperature is 75 DEG C -105 DEG C, extraction time 4h-8h, is leached
NO is recycled in the processx, magnetic separation is carried out after leaching, the magnetic concentrate selected returns to one section of leaching, and pulp liquid-solid isolation obtains
Two sections of leachates and two sections of leached muds；
C) two sections of leached muds return to one section of leaching process and use as diluent as finishing slag outlet, two sections of leachates are leached.
2. a kind of full leaching method of nitric acid of low high iron alloy powder of nickel according to claim 1, it is characterised in that: the step
A) granularity of the low high iron alloy powder of nickel is 20 mesh or less in.
3. a kind of full leaching method of nitric acid of low high iron alloy powder of nickel according to claim 1, it is characterised in that: the step
A), the concentration of the concentrated nitric acid in step b) is 69%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628738A (en) * | 2019-02-26 | 2019-04-16 | 中钢集团南京新材料研究院有限公司 | A kind of method of the sulfuric acid Selectively leaching of ferronickel concentrate |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109279665B (en) * | 2018-09-13 | 2020-09-25 | 郑忆依 | Treatment method of nickel cobalt lithium manganate ternary waste |
| CN112481502A (en) * | 2020-11-20 | 2021-03-12 | 湖南金鑫新材料股份有限公司 | Method for leaching iron-based nickel-cobalt alloy by NO catalytic oxidation method |
| CN113373311A (en) * | 2021-06-08 | 2021-09-10 | 金川镍钴研究设计院有限责任公司 | Method for fully soaking copper-nickel alloy powder in sulfuric acid at normal temperature and normal pressure |
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| CN101157982A (en) * | 2006-10-08 | 2008-04-09 | 中国恩菲工程技术有限公司 | Method for leaching bidery metal by sulfuric acid and inflation agitation leaching trough |
| CN101713029A (en) * | 2009-09-28 | 2010-05-26 | 雷在荣 | Comprehensively-utilizing process of waste residue containing vanadium, molybdenum, nickel and cobalt |
| CN104651620A (en) * | 2015-03-20 | 2015-05-27 | 西安瑞鑫科金属材料有限责任公司 | Method for regenerating high-purity nickel sulfate from nickel-based alloy waste material |
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- 2017-07-07 CN CN201710553021.XA patent/CN107151739B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157982A (en) * | 2006-10-08 | 2008-04-09 | 中国恩菲工程技术有限公司 | Method for leaching bidery metal by sulfuric acid and inflation agitation leaching trough |
| CN101713029A (en) * | 2009-09-28 | 2010-05-26 | 雷在荣 | Comprehensively-utilizing process of waste residue containing vanadium, molybdenum, nickel and cobalt |
| CN104651620A (en) * | 2015-03-20 | 2015-05-27 | 西安瑞鑫科金属材料有限责任公司 | Method for regenerating high-purity nickel sulfate from nickel-based alloy waste material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628738A (en) * | 2019-02-26 | 2019-04-16 | 中钢集团南京新材料研究院有限公司 | A kind of method of the sulfuric acid Selectively leaching of ferronickel concentrate |
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