CN105950863B - Ferronickel powder forming method - Google Patents
Ferronickel powder forming method Download PDFInfo
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- CN105950863B CN105950863B CN201610308961.8A CN201610308961A CN105950863B CN 105950863 B CN105950863 B CN 105950863B CN 201610308961 A CN201610308961 A CN 201610308961A CN 105950863 B CN105950863 B CN 105950863B
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- ferronickel powder
- mixture
- forming method
- ferronickel
- waterglass
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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
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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
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
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- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Glanulating (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention proposes ferronickel powder forming method, including：Ferronickel powder is mixed with waterglass and phosphoric acid, to obtain mixture；The mixture is heated；And the mixture after heating is subjected to pressure ball processing, to obtain ferronickel powder pelletizing.Thus the ferronickel powder forming method shaping efficiency of above-described embodiment is high, and the ferronickel powder pelletizing being prepared has good cold strength and hot strength.
Description
Technical field
The invention belongs to powder metallurgy forming technical fields, specifically, the present invention relates to ferronickel powder forming methods.
Background technology
Iron ball nodulizing is a kind of method of granule iron concentrate pelletizing of 20th century early development.It is that abundant ore source is increasingly withered
It exhausts, the result that lean ore resource largely develops and uses.With the almost harsh requirement that modern blast furnace ironmaking proposes fine fodder, and
The rise of steel short route, pellet have become indispensable high-quality furnace refractory in steel and iron industry.Bentonite conduct
The high-quality binder of conventional metallurgical mine, the advantages such as, resourceful, cheap good with balling property, at present bentonite
It has been widely used in metallurgical briquetting binder field.But bentonite is as a kind of silica and alundum (Al2O3) content
Higher raw material can cause Iron grade to reduce, increase the blast furnace process quantity of slag and blast furnace utilization rate after being added into iron powder pellets
Decline, therefore reduces in iron powder pellets bentonitic dosage and find new organic binder and become iron powder pellets in recent years and grind
The focal issue studied carefully.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
One purpose is to propose a kind of suitable for the molding ferronickel powder forming method of cold conditions.
According to an aspect of the present invention, the present invention proposes a kind of ferronickel powder forming method, including：
Ferronickel powder is mixed with waterglass and phosphoric acid, to obtain mixture；
The mixture is heated；And
The mixture after heating is subjected to pressure ball processing, to obtain ferronickel powder pelletizing.
For the ferronickel powder forming method of the above embodiment of the present invention using waterglass and phosphoric acid as binder, this is viscous as a result,
Knot agent is the obtained compound binding agent that is used in combination of organic matter and inorganic matter, using the binder can by ferronickel powder cold conditions at
Type, and the ferronickel powder pelletizing prepared has good cold strength and hot strength.In addition, the compound binding agent is not required to obtain through refining
For at solution, it can be directly added into ferronickel powder raw material and use, therefore is simple to operate, and then can effectively improve ferronickel powder
Shaping efficiency.
In addition, ferronickel powder forming method according to the above embodiment of the present invention can also have following additional technology special
Sign：
In some embodiments of the invention, the mixing is carried out according to the following steps：
Waterglass is added into ferronickel powder and carries out the first mixing, to obtain the first mixture；
Phosphoric acid is added into first mixture and carries out the second mixing, to obtain the second mixture.
In some embodiments of the invention, the sum of addition of the waterglass and the phosphoric acid is not more than the ferronickel
5 weight % of powder.
In some embodiments of the invention, the waterglass of addition and the phosphoric acid quality ratio are (5-8)：(1-3).
In some embodiments of the invention, the temperature of the heating is 100-150 degrees Celsius.
In some embodiments of the invention, the time of the heating is 0.5-1 hours.
In some embodiments of the invention, the pressure ball processing uses two pairs of rollers ball press.
In some embodiments of the invention, the pressure that the pressure ball processing uses is 11-15MPa.
In some embodiments of the invention, the compression strength of the ferronickel powder pelletizing >=300N/ balls, hot compression strength
>=1500N/ balls, (1000 DEG C of hot temperature, soaking time 0.5h).
Specific implementation mode
The embodiment of the present invention is described below in detail, the embodiments described below is exemplary, it is intended to for explaining this
Invention, and be not considered as limiting the invention.
According to an aspect of the present invention, the present invention proposes a kind of ferronickel powder forming method.According to of the invention specific real
The ferronickel powder forming method for applying example includes：Ferronickel powder is mixed with waterglass and phosphoric acid, to obtain mixture；It will be described
Mixture is heated；And the mixture after heating is subjected to pressure ball processing, to obtain ferronickel powder pelletizing.
The ferronickel powder forming method of the above embodiment of the present invention is used using waterglass and phosphoric acid as binder as a result,
Ferronickel powder cold conditions can be molded by the binder, and the ferronickel powder pelletizing prepared has good cold strength and hot strong
Degree.In addition, the compound binding agent, which is not required to carry, is prepared into solution, it can be directly added into ferronickel powder raw material and use, therefore operate letter
Folk prescription just, and then can effectively improve the shaping efficiency of ferronickel powder.
According to a particular embodiment of the invention, ferronickel powder is mixed with waterglass and phosphoric acid, it can be preferably according to
The following steps carry out：Waterglass is added into ferronickel powder and carries out the first mixing, to obtain the first mixture；To described first
Phosphoric acid is added in mixture and carries out the second mixing, to obtain the second mixture.From there through substep into ferronickel powder successively
Waterglass and phosphoric acid is added, and then bond effect can be further increased, so further increase the shaping efficiency of ferronickel powder with
And the quality for the ferronickel powder pelletizing being prepared.According to a particular embodiment of the invention, by the above method by ferronickel powder and water
Glass and phosphoric acid are mixed, and compression strength >=300N/ balls can be prepared, and hot compression strength >=1500N/ balls is (hot
1000 DEG C of temperature, soaking time 0.5h) ferronickel powder pelletizing.
According to a particular embodiment of the invention, first, waterglass is added into ferronickel powder, water glass solution can penetrate into
The density and intensity of ferronickel powder can be improved in hole between ferronickel powder, after solidification.And phosphoric acid has condensation at high temperature,
It is dehydrated at a temperature of 500~900 DEG C of temperature, phosphoric acid and waterglass can form polyphosphate and polysilicate between particle
Therefore high stability skeleton can significantly improve the high temperature resistance to compression of ferronickel powder pelletizing by the way that phosphoric acid and waterglass to be used in combination
Intensity.
According to a particular embodiment of the invention, ferronickel powder is mixed with waterglass and phosphoric acid, wherein waterglass and phosphorus
The sum of addition of acid is not more than 5 weight % of ferronickel powder.From there through control ferronickel powder and waterglass and phosphoric acid three proportioning,
Bond effect can be further increased.
According to a particular embodiment of the invention, waterglass Yu the phosphoric acid quality ratio of addition are (5-8)：(1-3).Invention human hair
Existing, since waterglass viscosity is higher, poor fluidity, therefore, the mixture prepared with ferronickel powder certainly will increase film between particle
Thickness, extend dehydration hardening needed for time, the intensity after hardening has downward trend, and the phosphoric acid of said ratio is added,
It then can reach preferable diluting effect so that intensity reaches maximum after hardening.And the proportioning is found through experiments that in inventor
High too low intensity variation after all influencing its hardening.
In addition, be not necessarily to be prepared into aqueous solution by controlling the compound binding agent that the proportioning obtains, and bond effect is good.It adopts
Not only there is good cold conditions compression strength with the ferronickel powder pelletizing that the compound binding agent is prepared, at 1000 DEG C, heat preservation
Between hot compression strength under the conditions of 0.5h it is also larger.
According to a particular embodiment of the invention, further, mixture is heated.And then it can make, waterglass
Solidification in advance.According to a particular embodiment of the invention, the temperature of heating is 100-150 degrees Celsius.From there through being heated to the temperature
Degree can be such that waterglass curing rate accelerates, and then improve ferronickel powder shaping efficiency.According to a particular embodiment of the invention, it heats
Time be 0.5-1 hours.From there through using above-mentioned heating condition best, long too short solidification effect is all bad.
According to a particular embodiment of the invention, the mixture after heating is finally subjected to pressure ball processing, to obtain
Ferronickel powder pelletizing.According to a particular embodiment of the invention, pressure ball processing uses two pairs of rollers ball press.Specific implementation according to the present invention
Example, the pressure that pressure ball processing uses is 11-15MPa.It is possible thereby to which the ferronickel that compression strength is met the requirements effectively is prepared
Sphere of powder group.The present invention is all made of general measuring method for the measurement method of compression strength and hot compression strength.According to this
The specific embodiment of invention, using the compression strength for the ferronickel powder pelletizing that the ferronickel powder forming method of above-described embodiment is prepared
>=300N/ balls, hot compression strength >=1500N/ balls, (1000 DEG C of hot temperature, soaking time 0.5h).
Embodiment 1
The compound binding agent is mainly made of phosphoric acid and waterglass, and the ratio of the two is 3:5；By above-mentioned compound binding agent with
Ferronickel powder mixes after five minutes, and heating a period of time, heating temperature is 100 degree, and heating time is 1 hour；It then will be after heating
Mixed material is sent into the two pairs of rollers ball press that pressure is 15MPa and prepares pelletizing.The pelletizing can bear higher elevated temperature strength, have good
Good high temperature resistance.Specifically, compression strength >=300N/ balls, hot compression strength >=1500N/ balls, (hot temperature 1000
DEG C, soaking time 0.5h).
Embodiment 2
The compound binding agent is mainly made of phosphoric acid and waterglass, and the ratio of the two is 1:8；By above-mentioned compound binding agent with
After ferronickel powder mixes 8 minutes, heating a period of time, heating temperature is 150 degree, and heating time is 30 minutes；Then after heating
Mixed material be sent into pressure be 13MPa two pairs of rollers ball press prepare pelletizing.The pelletizing can bear higher elevated temperature strength, have
Good high temperature resistance.Specifically, compression strength >=300N/ balls, hot compression strength >=1500N/ balls, (hot temperature
1000 DEG C, soaking time 0.5h).
Embodiment 3
The compound binding agent is mainly made of phosphoric acid and waterglass, and the ratio of the two is 2:7；By above-mentioned compound binding agent with
Ferronickel powder mixes after ten minutes, and heating a period of time, heating temperature is 130 degree, and heating time is 40 minutes；Then after heating
Mixed material be sent into pressure be 11MPa two pairs of rollers ball press prepare pelletizing.The pelletizing can bear higher elevated temperature strength, have
Good high temperature resistance.Specifically, compression strength >=300N/ balls, hot compression strength >=1500N/ balls, (hot temperature
1000 DEG C, soaking time 0.5h).
Comparative example 1
Metal iron powder is added in Iron Ore Powder, is mixed evenly；A certain amount of starch, sodium hydroxide and borax are weighed,
Be firstly added suitable quantity of water and solution be made in sodium hydroxide, borax, the backward solution in starch is added, be uniformly mixed；Or
Person weighs a certain amount of sodium humate dry powder or polyvinyl alcohol dry powder；The binder of above-mentioned preparation is added to Iron Ore Powder and iron powder
In, it is mixed evenly；Cooled agglomerated pellet is made through mixed grind, pelletizing or pressure ball in above-mentioned mixture.
Conclusion：(1) preparing binder used in the cooled agglomerated pellet adds water that need to prepare in advance, and is needed again during preparing pelletizing
Mixture is impregnated with by secondary plus water to be drenched, the slightly aobvious complexity of preparation process；(2) using pelletizing prepared by this method has good cold conditions
Intensity, but its high temperature hot strength is weaker.
Comparative example 2
A kind of compound binding agent containing coal iron powder pellets, the binder is mainly by modified humic acid ammonium, the 5-15% of 30-50%
Starch, 40-60% cosolvent composition, the compound binding agent be dry powder-shaped substance.
Conclusion：(1) compound binding agent needs addition moisture to make it dissolve first in use, then binder
It can play the role of bonding and fasten, rely on moisture larger, the slightly aobvious complexity of preparation process；(2) compound binding agent is only applicable in
In room temperature cold conditions condition of molding, the hot sticky knotting strength of high temperature is relatively low.
Comparative example 3
A kind of Iron Ore Powder pellet binder and its application, the chemical composition of the pellet binder are：Polyanion cellulose,
Xanthans, sesbania gum and locust tree glue.The application of the iron powder pellets includes：It prepares first and contains binder, sodium carbonate and bentonite
Mixture, then add the mixture in Iron concentrate, addition accounts for the 0.9-1.1% of Iron concentrate quality, is then added
A certain amount of moisture is uniformly mixed, and finally prepares pelletizing.
Conclusion：(1) pellet binder is mainly the addition colloid material of polymer and nature extraction, and
It needs that moisture dissolving, the slightly aobvious complexity of preparation process is added in preparation process；(2) pelletizing prepared by the binder is used to have good
Cold strength, but its high temperature hot strength is poor.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
It can be combined in any suitable manner in a or multiple embodiments or example.In addition, without conflicting with each other, the technology of this field
The feature of different embodiments or examples described in this specification and different embodiments or examples can be combined by personnel
And combination.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (6)
1. a kind of ferronickel powder forming method, which is characterized in that including：
Ferronickel powder is mixed with waterglass and phosphoric acid, to obtain mixture；
The mixture is heated；And
The mixture after heating is subjected to pressure ball processing, to obtain ferronickel powder pelletizing,
Wherein, the mixing is carried out according to the following steps：
Waterglass is added into ferronickel powder and carries out the first mixing, to obtain the first mixture；
Phosphoric acid is added into first mixture and carries out the second mixing, to obtain the second mixture,
The sum of addition of the waterglass and the phosphoric acid is not more than 5 weight % of the ferronickel powder,
The waterglass being added is (5-8) with the phosphoric acid quality ratio：(1-3).
2. ferronickel powder forming method according to claim 1, which is characterized in that the temperature of the heating is taken the photograph for 100-150
Family name's degree.
3. ferronickel powder forming method according to claim 1, which is characterized in that the time of the heating is 0.5-1 hours.
4. ferronickel powder forming method according to claim 1, which is characterized in that the pressure ball processing uses two pairs of rollers pressure ball
Machine.
5. ferronickel powder forming method according to claim 1, which is characterized in that the pressure that pressure ball processing uses for
11-15MPa。
6. ferronickel powder forming method according to claim 1, which is characterized in that the compression strength of the ferronickel powder pelletizing >=
300N/ balls, hot compression strength >=1500N/ balls.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610308961.8A CN105950863B (en) | 2016-05-11 | 2016-05-11 | Ferronickel powder forming method |
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| CN201610308961.8A CN105950863B (en) | 2016-05-11 | 2016-05-11 | Ferronickel powder forming method |
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| CN105950863A CN105950863A (en) | 2016-09-21 |
| CN105950863B true CN105950863B (en) | 2018-07-17 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056532A (en) * | 1991-05-24 | 1991-11-27 | 宣化钢铁公司 | The cold fixed agglomeration process of diffusing shape powder |
| CN1120074A (en) * | 1995-07-21 | 1996-04-10 | 宝山钢铁(集团)公司 | Method of production for direct reduction furnace charge by cold-consolidation briquetting method |
| CN1203954A (en) * | 1998-04-29 | 1999-01-06 | 宝山钢铁(集团)公司 | Production method of direct reduction shaft and blast furnace cold-bonded pellet |
| CN1537959A (en) * | 2003-10-23 | 2004-10-20 | 张玉山 | Cold aggregated pellet ore for ironmaking in blast furnace and its preparation method |
| CN101323904A (en) * | 2008-07-28 | 2008-12-17 | 红河恒昊矿业股份有限公司 | Method for enriching nickel iron ore concentrate from laterite type nickel ore by means of rotary kiln |
| CN101629237A (en) * | 2009-07-30 | 2010-01-20 | 山西太钢不锈钢股份有限公司 | Method for utilizing stainless steel dust and laterite as iron making materials |
-
2016
- 2016-05-11 CN CN201610308961.8A patent/CN105950863B/en active Active
Patent Citations (6)
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|---|---|---|---|---|
| CN1056532A (en) * | 1991-05-24 | 1991-11-27 | 宣化钢铁公司 | The cold fixed agglomeration process of diffusing shape powder |
| CN1120074A (en) * | 1995-07-21 | 1996-04-10 | 宝山钢铁(集团)公司 | Method of production for direct reduction furnace charge by cold-consolidation briquetting method |
| CN1203954A (en) * | 1998-04-29 | 1999-01-06 | 宝山钢铁(集团)公司 | Production method of direct reduction shaft and blast furnace cold-bonded pellet |
| CN1537959A (en) * | 2003-10-23 | 2004-10-20 | 张玉山 | Cold aggregated pellet ore for ironmaking in blast furnace and its preparation method |
| CN101323904A (en) * | 2008-07-28 | 2008-12-17 | 红河恒昊矿业股份有限公司 | Method for enriching nickel iron ore concentrate from laterite type nickel ore by means of rotary kiln |
| CN101629237A (en) * | 2009-07-30 | 2010-01-20 | 山西太钢不锈钢股份有限公司 | Method for utilizing stainless steel dust and laterite as iron making materials |
Non-Patent Citations (1)
| Title |
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| 磷酸水玻璃粘结剂在高铝涂料和垫料中的应用;余男志 等;《机车车辆工艺》;19861231;第26-28页 * |
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