CN106435171A - Method for producing fine iron powder through sulfuric-acid residues - Google Patents
Method for producing fine iron powder through sulfuric-acid residues Download PDFInfo
- Publication number
- CN106435171A CN106435171A CN201611040777.6A CN201611040777A CN106435171A CN 106435171 A CN106435171 A CN 106435171A CN 201611040777 A CN201611040777 A CN 201611040777A CN 106435171 A CN106435171 A CN 106435171A
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- CN
- China
- Prior art keywords
- slag
- sulfuric
- sulphuric acid
- iron concentrate
- sulfate
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Classifications
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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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
-
- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
-
- 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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- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the technical filed of fine iron powder preparing, and particular relates to a method for producing fine iron powder through sulfuric-acid residues. The method includes the steps that a, the sulfuric-acid residues are taken and subjected to ball milling, and sulfuric-acid residue powder with the particle size of 80 mesh to 120 mesh; b, the ulfuric-acid residue powder obtained in the step a are added into sulfuric acid, the mixture is leached for 2 h to 8 h and filtered, and acid pickling residues are obtained, wherein the adding amount of the sulfuric acid accounts for 10% to 20% of the mass of the sulfuric-acid residue powder; c, the acid pickling residues obtained in the step b are added into water, the mixture is washed, and washing residues are obtained; d, an adhesive is added into the washing residues obtained in the step c, the mixture is pelletized, calcined for 60 min to 90 min at the temperature of 850 DEG C and subjected to magnetic separation, and the fine iron powder is obtained. By means of the method for producing the fine iron powder through the sulfuric-acid residues, the grade of the fine iron powder can be greatly improved, the final grade of the fine iron powder can be 70% or above, the iron yield is 80% or above, and the aims of turning waste into wealth and comprehensive using are really achieved.
Description
Technical field
The invention belongs to Iron concentrate preparing technical field and in particular to a kind of sulfate slag produce Iron concentrate method.
Background technology
China is currently to produce the most country of iron and steel in the world, and the iron ore deposit of China is worldwide belonging to
How the country of relative shortage, need to make good use of existing mineral resources from the substantial amounts of iron ore of external import every year, particularly profit
Make good use of the important topic that the mineral resources put aside as useless are current social development.
Sulfate slag is to produce, with troilite, a kind of solid slag producing in sulfuric acid process, because its ferrous grade is not high and
Harmful element content is higher, and the purposes of current sulfate slag mainly has two kinds：One is the low raw material as manufacture of cement of iron content, two
It is high the producing for iron and steel of iron content, its utilization rate is relatively low, and substantial amounts of sulfate slag then needs land occupation to be stacked, and this not only makes
Become the waste of iron resource, and cause the pollution of environment, therefore, find a kind of advanced production technology so that produce qualified
Iron concentrate, realizes the recovery of sulfate slag and using having great economy and Significance for Environment.
Content of the invention
The technical problem to be solved is a kind of method providing sulfate slag to produce Iron concentrate.
A kind of method that sulfate slag produces Iron concentrate, comprises the following steps：
A, take sulfate slag, ball milling, obtain the sulphuric acid ground-slag that granularity is 80～120 mesh；
Add sulphuric acid in b, the sulphuric acid ground-slag that a step is obtained, leach 2～8h, filter, obtain pickling slag；Wherein, sulphuric acid adds
Enter amount for the 10～20% of sulfate slag silty amount；
C, the pickling slag obtaining b step add water and are washed, and obtain washing slag；
Add adhesive, pelletizing in d, the washing slag obtaining to step c, then calcine 60～90min at 850 DEG C, magnetic separation,
Obtain Iron concentrate.
Further, the method that a kind of above-mentioned sulfate slag produces Iron concentrate, wherein in b step, sulphuric acid is sulfate slag
The 15% of silty amount.
The method that a kind of above-mentioned sulfate slag produces Iron concentrate, wherein b step sulfuric acid concentration are 30～45wt%.
The method that a kind of above-mentioned sulfate slag produces Iron concentrate, washes 3～5 times wherein in step c.
The method that a kind of above-mentioned sulfate slag produces Iron concentrate, wherein adhesive described in Step d are phenolic resin, ureaformaldehyde tree
At least one in fat, polyvinyl alcohol.
The method that a kind of above-mentioned sulfate slag produces Iron concentrate, wherein described in Step d, during magnetic separation, exciting curent is 15～20A.
The method that sulfate slag of the present invention produces Iron concentrate, process is simple, remove sulphuric acid after ball milling, pickling, washing
In slag, most of impurity element, can greatly improve the grade of Iron concentrate, then passes through pelletizing, high-temperature calcination reduction and magnetic separation,
Obtain Haematite grade powder up to more than 70% eventually, ferrum yield reaches more than 80%, is truly realized and turns waste into wealth, comprehensive utilization
Purpose.
Specific embodiment
A kind of method that sulfate slag produces Iron concentrate, comprises the following steps：
A, take sulfate slag, ball milling, obtain the sulphuric acid ground-slag that granularity is 80～120 mesh；
Add sulphuric acid in b, the sulphuric acid ground-slag that a step is obtained, leach 2～8h, filter, obtain pickling slag；Wherein, sulphuric acid adds
Enter amount for the 10～20% of sulfate slag silty amount；
C, the pickling slag obtaining b step add water and are washed, and obtain washing slag；
Add adhesive, pelletizing in d, the washing slag obtaining to step c, then calcine 60～90min at 850 DEG C, magnetic separation,
Obtain Iron concentrate.
Further, the method that a kind of above-mentioned sulfate slag produces Iron concentrate, wherein in b step, sulphuric acid is sulfate slag
The 15% of silty amount.
The method that a kind of above-mentioned sulfate slag produces Iron concentrate, wherein b step sulfuric acid concentration are 30～45wt%.
The method that a kind of above-mentioned sulfate slag produces Iron concentrate, washes 3～5 times wherein in step c.
The method that a kind of above-mentioned sulfate slag produces Iron concentrate, wherein adhesive described in Step d are phenolic resin, ureaformaldehyde tree
At least one in fat, polyvinyl alcohol.
The method that a kind of above-mentioned sulfate slag produces Iron concentrate, wherein described in Step d, during magnetic separation, exciting curent is 15～20A.
With reference to embodiment, the specific embodiment of the present invention is further described, therefore the present invention is not limited
System is among described scope of embodiments.
Embodiment 1
A, the sulfate slag taking iron content to be 38%, carry out ball milling in ball mill, obtain the sulphuric acid that granularity is 80～120 mesh
Ground-slag；
Add the sulphuric acid that mass fraction is 40% in b, the sulphuric acid ground-slag that a step is obtained, leach 6h, filter, obtain pickling
Slag；Wherein, sulphuric acid is the 15% of sulfate slag silty amount；
C, the pickling slag obtaining b step add water and are washed, and wash 3～5 times, obtain washing slag；
Add phenolic resin, pelletizing in d, the washing slag obtaining to step c, then calcine 80min, magnetic separation, magnetic at 850 DEG C
When selecting, exciting curent is 18A, obtains Iron concentrate.
The Haematite grade powder that said method obtains is 78%, and iron recovery is 84%.
Embodiment 2
A, the sulfate slag taking iron content to be 40%, carry out ball milling in ball mill, obtain the sulphuric acid that granularity is 80～120 mesh
Ground-slag；
Add the sulphuric acid that mass fraction is 35% in b, the sulphuric acid ground-slag that a step is obtained, leach 7h, filter, obtain pickling
Slag；Wherein, sulphuric acid is the 10% of sulfate slag silty amount；
C, the pickling slag obtaining b step add water and are washed, and wash 3～5 times, obtain washing slag；
Add Lauxite, pelletizing in d, the washing slag obtaining to step c, then calcine 60min, magnetic separation, magnetic at 850 DEG C
When selecting, exciting curent is 16A, obtains Iron concentrate.
The Haematite grade powder that said method obtains is 79%, and iron recovery is 85%.
Embodiment 3
A, the sulfate slag taking iron content to be 36%, carry out ball milling in ball mill, obtain the sulphuric acid that granularity is 80～120 mesh
Ground-slag；
Add the sulphuric acid that mass fraction is 45% in b, the sulphuric acid ground-slag that a step is obtained, leach 8h, filter, obtain pickling
Slag；Wherein, sulphuric acid is the 20% of sulfate slag silty amount；
C, the pickling slag obtaining b step add water and are washed, and wash 3～5 times, obtain washing slag；
Add polyvinyl alcohol, pelletizing in d, the washing slag obtaining to step c, then calcine 90min, magnetic separation, magnetic at 850 DEG C
When selecting, exciting curent is 20A, obtains Iron concentrate.
The Haematite grade powder that said method obtains is 76%, and iron recovery is 82%.
Claims (6)
1. a kind of sulfate slag produces the method for Iron concentrate it is characterised in that comprising the following steps：
A, take sulfate slag, ball milling, obtain the sulphuric acid ground-slag that granularity is 80～120 mesh；
Add sulphuric acid in b, the sulphuric acid ground-slag that a step is obtained, leach 2～8h, filter, obtain pickling slag；Wherein, sulphuric acid
For sulfate slag silty amount 10～20%；
C, the pickling slag obtaining b step add water and are washed, and obtain washing slag；
Add adhesive, pelletizing in d, the washing slag obtaining to step c, then calcine 60～90min, magnetic separation at 850 DEG C, obtain ferrum
Fine powder.
2. according to claim 1 a kind of sulfate slag produce Iron concentrate method it is characterised in that：In b step, sulphuric acid adds
Measure 15% for sulfate slag silty amount.
3. a kind of sulfate slag according to claim 1 or claim 2 produce Iron concentrate method it is characterised in that：B step sulfuric acid concentration
For 30～45wt%.
4. according to claim 1 a kind of sulfate slag produce Iron concentrate method it is characterised in that：3～5 are washed in step c
Secondary.
5. according to claim 1 a kind of sulfate slag produce Iron concentrate method it is characterised in that：Adhesive described in Step d
For at least one in phenolic resin, Lauxite, polyvinyl alcohol.
6. according to claim 1 a kind of sulfate slag produce Iron concentrate method it is characterised in that：Described in Step d during magnetic separation
Exciting curent is 15～20A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611040777.6A CN106435171A (en) | 2016-11-24 | 2016-11-24 | Method for producing fine iron powder through sulfuric-acid residues |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611040777.6A CN106435171A (en) | 2016-11-24 | 2016-11-24 | Method for producing fine iron powder through sulfuric-acid residues |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106435171A true CN106435171A (en) | 2017-02-22 |
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ID=58221675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611040777.6A Pending CN106435171A (en) | 2016-11-24 | 2016-11-24 | Method for producing fine iron powder through sulfuric-acid residues |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109609768A (en) * | 2018-12-28 | 2019-04-12 | 武汉工程大学 | A kind of method of comprehensive utilization of low-grade cupric cobalt sulfate slag |
| CN116119639A (en) * | 2022-11-25 | 2023-05-16 | 四川省银河化学股份有限公司 | Method for preparing lithium iron phosphate from sulfuric acid residues |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425509A (en) * | 2002-11-27 | 2003-06-25 | 谢海泉 | Process for recovering and reutilizing sulfuric acid dregs waste material |
| CN1924034A (en) * | 2005-09-01 | 2007-03-07 | 中南大学 | Method of producing high grade magnetic concentrate from sulfuric-acid residue composite pellet |
| CN103088203A (en) * | 2013-03-01 | 2013-05-08 | 罗涛 | Method for producing fine iron powder by sulfate slag |
-
2016
- 2016-11-24 CN CN201611040777.6A patent/CN106435171A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425509A (en) * | 2002-11-27 | 2003-06-25 | 谢海泉 | Process for recovering and reutilizing sulfuric acid dregs waste material |
| CN1924034A (en) * | 2005-09-01 | 2007-03-07 | 中南大学 | Method of producing high grade magnetic concentrate from sulfuric-acid residue composite pellet |
| CN103088203A (en) * | 2013-03-01 | 2013-05-08 | 罗涛 | Method for producing fine iron powder by sulfate slag |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109609768A (en) * | 2018-12-28 | 2019-04-12 | 武汉工程大学 | A kind of method of comprehensive utilization of low-grade cupric cobalt sulfate slag |
| CN116119639A (en) * | 2022-11-25 | 2023-05-16 | 四川省银河化学股份有限公司 | Method for preparing lithium iron phosphate from sulfuric acid residues |
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Application publication date: 20170222 |