CN107151739A - 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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- CN107151739A CN107151739A CN201710553021.XA CN201710553021A CN107151739A CN 107151739 A CN107151739 A CN 107151739A CN 201710553021 A CN201710553021 A CN 201710553021A CN 107151739 A CN107151739 A CN 107151739A
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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
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Abstract
The invention discloses a kind of full leaching method of nitric acid of the low high iron alloy powder of nickel, the high iron alloy powder of low nickel using one section of leaching of concentrated nitric acid and is obtained one section of leachate and one section of leached mud by this method first, one section of leachate enters iron removal step processing and reclaims nickel cobalt valuable metal, one section of leached mud continuously adds concentrated nitric acid and carries out two sections of leachings, leaching carries out magnetic separation after terminating, 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 used as row outside leaching finishing slag.The present invention handles the low high iron alloy powder of nickel by two sections of counterflow leachings of nitric acid and can reduced always with acid amount more than 20% compared to single-stage leaching, ore pulp leached to two sections simultaneously after carries out magnetic separation, the metalliferous material not reacted completely can be separated, return and leach process, further increase nickel cobalt leaching rate, nickel cobalt leaching rate can reach more than 98%, and can guarantee that outer row 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 technology
Lateritic nickel ore uses the thick ferronickel of RKEF smelting process outputs, for the high iron alloy powder of low nickel, composition be 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 main with simple substance in the thick ferronickel powder
Or alloy form is present, using traditional sulfuric acid leaching, nickel cobalt leaching rate is below 50%, and a large amount of iron enter in ferrous iron form
Entering solution causes next step process difficult except iron；Potassium cloride ferronickel cobalt leaching rate can reach 95% or so, but except iron cost
It is high.
The content of the invention
The invention aims to solve technical problem present in prior art there is provided a kind of nickel, cobalt leaching rate it is high,
Environmental protection, the full leaching method of nitric acid for being easy to the follow-up high iron alloy powder of low nickel for removing iron.
In order to achieve the above object, the present invention uses following technical scheme：A kind of nitric acid of the high iron alloy powder of low nickel soaks entirely
Method, this method comprises the following steps：
A) one section of leaching：Concentrated nitric acid is added in the high iron alloy powder of low nickel, the addition of concentrated nitric acid is high for the low nickel of 0.3-1.2t/t
Iron alloy powder, adds diluent and controls liquid-solid ratio to be 7-10:1, extraction temperature is 75 DEG C -105 DEG C, and extraction time is 4h-8h,
NO is reclaimed in leaching processx, leaching terminates rear solid-liquor separation and obtains one section of leachate and one section of leached mud, and one section of leachate enters
Nickel cobalt valuable metal is reclaimed in iron removal step processing；
B) two sections of leachings：Concentrated nitric acid is added in one section of leached mud, the addition of concentrated nitric acid is closed for the low nickel high ferros of 1.7-2.8t/t
Bronze, adds diluent and controls liquid-solid ratio to be 7-10:1, extraction temperature is 75 DEG C -105 DEG C, and extraction time is 4h-8h, is leached
During reclaim NOx, leach and carry out magnetic separation after terminating, the magnetic concentrate selected returns to one section of leaching, pulp liquid-solid isolation is obtained
Two sections of leachates and two sections of leached muds；
C) two sections of leached muds return to one section of leaching process and used as diluent as row outside finishing slag, two sections of leachates are leached.
Further, the granularity of the low high iron alloy powder of nickel is below 20 mesh in the step a).
Further, the step a), step b), the concentration of concentrated nitric acid in step c) are 69%.
The present invention has the advantages that compared with the prior art：The full leaching method of nitric acid of the low high iron alloy powder of nickel of the present invention
The high iron alloy powder of low nickel using one section of leaching of concentrated nitric acid and is obtained into one section of leachate and one section of leached mud, one section of leachate first
Nickel cobalt valuable metal is reclaimed into iron removal step processing, 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 and one section of leaching are carried out after one section of leaching process, supplement concentrated nitric acid, and two sections of leached muds are as leaching outside finishing slag
Row.The present invention handles the low high iron alloy powder of nickel by two sections of counterflow leachings of nitric acid and can reduced always with acid amount 20% compared to single-stage leaching
More than, while the ore pulp after being leached to two sections carries out magnetic separation, the metalliferous material not reacted completely can be separated, return and leach
Process, further increases nickel cobalt leaching rate, nickel cobalt leaching rate can reach more than 98%, and it is nickeliferous to can guarantee that outer row leaches finishing slag
＜ 0.3%, iron ＜ 6%.In addition, iron mainly enters solution with ferric form, be conducive to the removing to iron in follow-up iron removal step.
Brief description of the drawings
Fig. 1 is process flow diagram of the invention.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
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 comprises the following steps：
A) one section of leaching：The concentrated nitric acid that concentration is 69%, dense nitre are added in the high iron alloy powder of low nickel that granularity is below 20 mesh
The addition of acid is the high iron alloy powder of the low nickel of 0.6t/t, adds diluent and controls liquid-solid ratio to be 7:1, extraction temperature is 95 DEG C,
Extraction time is to reclaim NO in 4h, leaching processx（NO and NO2 mixture）, leaching terminate rear solid-liquor separation obtain one section leaching
Go out liquid and one section of leached mud, one section of leachate enters iron removal step processing and reclaims nickel cobalt valuable metal.
B) two sections of leachings：The concentrated nitric acid that concentration is 69% is added in one section of leached mud, the addition of concentrated nitric acid is 1.7t/
The high iron alloy powder of the low nickel of t, adds diluent and controls liquid-solid ratio to be 7:1, extraction temperature is 95 DEG C, and extraction time is 4h, is leached
During reclaim NOx（NO and NO2 mixture）, leach and carry out magnetic separation after terminating, 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) two sections of leached muds return to one section of leaching process and used as diluent as row outside finishing slag, two sections of leachates are leached.
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 comprises the following steps：
A) one section of leaching：The concentrated nitric acid that concentration is 69%, dense nitre are added in the high iron alloy powder of low nickel that granularity is below 20 mesh
The addition of acid is the high iron alloy powder of the low nickel of 0.3t/t, adds diluent and controls liquid-solid ratio to be 7:1, extraction temperature is 75 DEG C,
Extraction time is to reclaim NO in 6h, leaching process2, solid-liquor separation obtains one section of leachate and one section of leached mud, one section after leaching
Leachate enters iron removal step processing and reclaims nickel cobalt valuable metal；
B) two sections of leachings：The concentrated nitric acid that concentration is 69% is added in one section of leached mud, the addition of concentrated nitric acid is low for 2.0t/t
The high iron alloy powder of nickel, adds diluent and controls liquid-solid ratio to be 7:1, extraction temperature is 75 DEG C, and extraction time is 6h, leaching process
Middle recovery NO2, leach and carry out magnetic separation after terminating, the magnetic concentrate selected returns to one section of leaching, pulp liquid-solid isolation obtains two sections
Leachate and two sections of leached muds；
C) two sections of leached muds return to one section of leaching process and used as diluent as row outside finishing slag, two sections of leachates are leached.
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 comprises the following steps：
A) one section of leaching：The concentrated nitric acid that concentration is 69%, dense nitre are added in the high iron alloy powder of low nickel that granularity is below 20 mesh
The addition of acid is the high iron alloy powder of the low nickel of 0.9t/t, adds diluent and controls liquid-solid ratio to be 10:1, extraction temperature is 105
DEG C, extraction time is to reclaim NO in 8h, leaching process2, solid-liquor separation obtains one section of leachate and one section of leached mud, one after leaching
Section leachate enters iron removal step processing and reclaims nickel cobalt valuable metal；
B) two sections of leachings：The concentrated nitric acid that concentration is 69% is added in one section of leached mud, the addition of concentrated nitric acid is low for 2.4t/t
The high iron alloy powder of nickel, adds diluent and controls liquid-solid ratio to be 10:1, extraction temperature is 105 DEG C, and extraction time is 8h, is leached
NO is reclaimed in journey2, leach and carry out magnetic separation after terminating, the magnetic concentrate selected returns to one section of leaching, pulp liquid-solid isolation obtains two
Section leachate and two sections of leached muds；
C) two sections of leached muds return to one section of leaching process and used as diluent as row outside finishing slag, two sections of leachates are leached.
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 comprises the following steps：
A) one section of leaching：The concentrated nitric acid that concentration is 69%, dense nitre are added in the high iron alloy powder of low nickel that granularity is below 20 mesh
The addition of acid is the high iron alloy powder of the low nickel of 1.2t/t, adds diluent and controls liquid-solid ratio to be 9:1, extraction temperature is 85 DEG C,
Extraction time is to reclaim NO in 5h, leaching process2, solid-liquor separation obtains one section of leachate and one section of leached mud, one section after leaching
Leachate enters iron removal step processing and reclaims nickel cobalt valuable metal；
B) two sections of leachings：The concentrated nitric acid that concentration is 69% is added in one section of leached mud, the addition of concentrated nitric acid is low for 2.8t/t
The high iron alloy powder of nickel, adds diluent and controls liquid-solid ratio to be 9:1, extraction temperature is 85 DEG C, and extraction time is 5h, leaching process
Middle recovery NO2, leach and carry out magnetic separation after terminating, the magnetic concentrate selected returns to one section of leaching, pulp liquid-solid isolation obtains two sections
Leachate and two sections of leached muds；
C) two sections of leached muds return to one section of leaching process and used as diluent as row outside finishing slag, two sections of leachates are leached.
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 this method comprises the following steps：
A) one section of leaching：Concentrated nitric acid is added in the high iron alloy powder of low nickel, the addition of concentrated nitric acid is high for the low nickel of 0.3-1.2t/t
Iron alloy powder, adds diluent and controls liquid-solid ratio to be 7-10:1, extraction temperature is 75 DEG C -105 DEG C, and extraction time is 4h-8h,
NO is reclaimed in leaching processx, leaching terminates rear solid-liquor separation and obtains one section of leachate and one section of leached mud, and one section of leachate enters
Nickel cobalt valuable metal is reclaimed in iron removal step processing；
B) two sections of leachings：Concentrated nitric acid is added in one section of leached mud, the addition of concentrated nitric acid is closed for the low nickel high ferros of 1.7-2.8t/t
Bronze, adds diluent and controls liquid-solid ratio to be 7-10:1, extraction temperature is 75 DEG C -105 DEG C, and extraction time is 4h-8h, is leached
During reclaim NOx, leach and carry out magnetic separation after terminating, the magnetic concentrate selected returns to one section of leaching, pulp liquid-solid isolation is obtained
Two sections of leachates and two sections of leached muds；
C) two sections of leached muds return to one section of leaching process and used as diluent as row outside finishing slag, 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 below 20 mesh 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), step b), the concentration of concentrated nitric acid in step c) are 69%.
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| CN201710553021.XA CN107151739B (en) | 2017-07-07 | 2017-07-07 | A kind of full leaching method of nitric acid of the high iron alloy powder of low nickel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109279665A (en) * | 2018-09-13 | 2019-01-29 | 郑忆依 | A kind of processing method of nickle cobalt lithium manganate ternary waste material |
| 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 |
| 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
- 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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109279665A (en) * | 2018-09-13 | 2019-01-29 | 郑忆依 | A kind of processing method of nickle cobalt lithium manganate ternary waste material |
| CN109279665B (en) * | 2018-09-13 | 2020-09-25 | 郑忆依 | Treatment method of nickel cobalt lithium manganate ternary waste |
| 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 |
| 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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