CN105950863A - Ferronickel powder forming method - Google Patents
Ferronickel powder forming method Download PDFInfo
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- CN105950863A CN105950863A CN201610308961.8A CN201610308961A CN105950863A CN 105950863 A CN105950863 A CN 105950863A CN 201610308961 A CN201610308961 A CN 201610308961A CN 105950863 A CN105950863 A CN 105950863A
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- ferronickel powder
- forming method
- mixture
- ferronickel
- powder forming
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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 invention provides a ferronickel powder forming method. The method comprises the steps that ferronickel powder is mixed with water glass and phosphoric acid to obtain a mixture; the mixture is heated; and the heated mixture is subjected to ball pressing treatment to obtain ferronickel powder pellets. By means of the embodiment of the ferronickel powder forming method, the forming efficiency is high, and the prepared ferronickel powder pellets have good cold strength and hot strength.
Description
Technical field
The invention belongs to powder metallurgy forming technical field, specifically, the present invention relates to ferronickel powder forming method.
Background technology
Iron ball nodulizing is the method for a kind of granule iron concentrate pelletizing of 20th century early development.It is abundant ore source day by day exhausted,
The result that lean ore resources develops in a large number.Almost harsh requirement concentrate proposed along with modern blast furnace ironmaking, Yi Jigang
The rise of ferrum short route, pellet has become as indispensable high-quality furnace refractory in steel and iron industry.Bentonite is as biography
The high-quality binding agent in the metallurgical ore deposit of system, it has, and balling property is good, aboundresources, the advantage such as cheap, current bentonite
It is widely used in metallurgical briquetting binding agent field.But bentonite is as a kind of silicon dioxide and aluminium sesquioxide content
Higher raw material, it 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 reduce in iron powder pellets bentonitic consumption and find new organic binder bond and become iron powder pellets in recent years and grind
The focal issue studied carefully.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the one of the present invention
Purpose is to propose a kind of ferronickel powder forming method being suitable to cold conditions molding.
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, in order to obtain mixture；
Described mixture is heated；And
Described mixture after heating is carried out pressure ball process, in order to obtain ferronickel powder pelletizing.
Thus, the ferronickel powder forming method of the above embodiment of the present invention use waterglass and phosphoric acid as binding agent, this binding agent
The compound binding agent obtained being used in combination for Organic substance and inorganic matter, use this binding agent can by ferronickel powder cold conditions molding,
And the ferronickel powder pelletizing prepared has good cold strength and hot strength.It addition, this compound binding agent is not required to obtain through refining standby
Become solution, use can be directly added in ferronickel powder raw material, the most simple to operation, and then ferronickel powder can be effectively improved
Shaping efficiency.
It addition, ferronickel powder forming method according to the above embodiment of the present invention can also have a following additional technical characteristic:
In some embodiments of the invention, described mixing is carried out according to the following step:
In ferronickel powder, add waterglass and carry out the first mixing, in order to obtaining the first mixture；
In described first mixture, add phosphoric acid and carry out the second mixing, in order to obtaining the second mixture.
In some embodiments of the invention, the addition sum of described waterglass and described phosphoric acid is not more than described ferronickel powder 5
Weight %.
In some embodiments of the invention, the described waterglass of addition and described phosphoric acid quality are than being (5-8): (1-3).
In some embodiments of the invention, the temperature of described heating is 100-150 degree Celsius.
In some embodiments of the invention, the time of described heating is 0.5-1 hour.
In some embodiments of the invention, described pressure ball processes and uses roller ball press.
In some embodiments of the invention, described pressure ball processes the pressure used is 11-15MPa.
In some embodiments of the invention, the comprcssive strength of described ferronickel powder pelletizing >=300N/ ball, hot comprcssive strength >=
1500N/ ball, (hot temperature 1000 DEG C, temperature retention time 0.5h).
Detailed description of the invention
Embodiments of the invention are described below in detail, and the embodiments described below is exemplary, it is intended to be used for explaining the present 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 the specific embodiment of the invention
Ferronickel powder forming method include: ferronickel powder is mixed with waterglass and phosphoric acid, in order to obtain mixture；By described mixed
Compound heats；And the described mixture after heating is carried out pressure ball process, in order to obtain ferronickel powder pelletizing.
Thus, the ferronickel powder forming method of the above embodiment of the present invention uses waterglass and phosphoric acid as binding agent, uses this to glue
Knot agent can be by ferronickel powder cold conditions molding, and the ferronickel powder pelletizing prepared has good cold strength and hot strength.Separately
Outward, this compound binding agent is not required to carry and is prepared as solution, can be directly added in ferronickel powder raw material use, side the most simple to operate
And then the shaping efficiency of ferronickel powder can be effectively improved just,.
According to a particular embodiment of the invention, ferronickel powder is mixed with waterglass and phosphoric acid, it may be preferred to ground is according to following
Step is carried out: adds waterglass in ferronickel powder and carries out the first mixing, in order to obtaining the first mixture；Mix to described first
Compound add phosphoric acid and carries out the second mixing, in order to obtaining the second mixture.Add successively in ferronickel powder from there through substep
Enter waterglass and phosphoric acid, and then bond effect can be improved further, so improve further ferronickel powder shaping efficiency and
The quality of the ferronickel powder pelletizing prepared.According to a particular embodiment of the invention, by said method by ferronickel powder and water glass
Glass and phosphoric acid mix, and can prepare comprcssive strength >=300N/ ball, and hot comprcssive strength >=1500N/ ball is (hot
Temperature 1000 DEG C, temperature retention time 0.5h) ferronickel powder pelletizing.
According to a particular embodiment of the invention, first, adding waterglass in ferronickel powder, water glass solution can penetrate into nickel
In hole between iron powder, density and the intensity of ferronickel powder after solidification, can be improved.And phosphoric acid at high temperature has condensation,
Being dehydrated at a temperature of temperature 500～900 DEG C, phosphoric acid and waterglass can form polyphosphate and polysilicate between granule
High stability skeleton, therefore, by being used in combination the high temperature resistance to compression that can significantly improve ferronickel powder pelletizing by phosphoric acid and waterglass
Intensity.
According to a particular embodiment of the invention, ferronickel powder is mixed with waterglass and phosphoric acid, wherein waterglass and phosphoric acid
Addition sum is not more than ferronickel powder 5 weight %.From there through controlling ferronickel powder and waterglass and the proportioning of phosphoric acid three, can
To improve bond effect further.
According to a particular embodiment of the invention, the waterglass of addition and phosphoric acid quality are than being (5-8): (1-3).Inventor finds,
Owing to waterglass viscosity is higher, poor fluidity, therefore, and the compound of ferronickel powder preparation certainly will increase thin film between granule
Thickness, extends the time needed for dehydration hardening, and the intensity after hardening has downward trend, and adds the phosphoric acid of said ratio,
Then can reach preferable diluting effect so that after hardening, intensity reaches maximum.And inventor is found through experiments this proportioning mistake
Height is too low all will affect intensity variation after its hardening.
It addition, by controlling compound binding agent that this proportioning obtains without being prepared as aqueous solution, and bond effect is good.Use
The ferronickel powder pelletizing that this compound binding agent prepares not only has good cold conditions comprcssive strength, at 1000 DEG C, and temperature retention time
Hot comprcssive strength under the conditions of 0.5h is the biggest.
According to a particular embodiment of the invention, further, mixture is heated.And then so that, waterglass pre-
First solidify.According to a particular embodiment of the invention, the temperature of heating is 100-150 degree Celsius.From there through being heated to this temperature
Degree can make waterglass curing rate accelerate, and then improves ferronickel powder shaping efficiency.According to a particular embodiment of the invention, add
The time of heat is 0.5-1 hour.Optimal from there through using above-mentioned heating condition, long too short solidification effect is the most bad.
According to a particular embodiment of the invention, finally the described mixture after heating is carried out pressure ball process, in order to obtain ferronickel
Sphere of powder group.According to a particular embodiment of the invention, pressure ball processes and uses roller ball press.According to a particular embodiment of the invention,
It is 11-15MPa that pressure ball processes the pressure used.Thus can effectively prepare comprcssive strength and meet the ferronickel sphere of powder of requirement
Group.The present invention, for comprcssive strength and the measuring method of hot comprcssive strength, all uses general measuring method.According to this
Bright specific embodiment, the comprcssive strength of the ferronickel powder pelletizing that the ferronickel powder forming method of employing above-described embodiment prepares >=
300N/ ball, hot comprcssive strength >=1500N/ ball, (hot temperature 1000 DEG C, temperature retention time 0.5h).
Embodiment 1
This compound binding agent is mainly made up of phosphoric acid and waterglass, and both ratios are 3:5；By above-mentioned compound binding agent with
After ferronickel powder mixes 5 minutes, heating a period of time, heating-up temperature is 100 degree, and heat time heating time is 1 hour；Then
Will heating after mixed material send into pressure be 15MPa to roll-in ball mechanism for pelletizing.This pelletizing can bear higher
Elevated temperature strength, has good resistance to elevated temperatures.Specifically, comprcssive strength >=300N/ ball, hot comprcssive strength >=1500N/
Ball, (hot temperature 1000 DEG C, temperature retention time 0.5h).
Embodiment 2
This compound binding agent is mainly made up of phosphoric acid and waterglass, and both ratios are 1:8；By above-mentioned compound binding agent with
After ferronickel powder mixes 8 minutes, heating a period of time, heating-up temperature is 150 degree, and heat time heating time is 30 minutes；Then
Will heating after mixed material send into pressure be 13MPa to roll-in ball mechanism for pelletizing.This pelletizing can bear higher
Elevated temperature strength, has good resistance to elevated temperatures.Specifically, comprcssive strength >=300N/ ball, hot comprcssive strength >=1500N/
Ball, (hot temperature 1000 DEG C, temperature retention time 0.5h).
Embodiment 3
This compound binding agent is mainly made up of phosphoric acid and waterglass, and both ratios are 2:7；By above-mentioned compound binding agent with
After ferronickel powder mixes 10 minutes, heating a period of time, heating-up temperature is 130 degree, and heat time heating time is 40 minutes；So
After will heating after mixed material send into pressure be 11MPa to roll-in ball mechanism for pelletizing.This pelletizing can bear higher
Elevated temperature strength, there is good resistance to elevated temperatures.Specifically, comprcssive strength >=300N/ ball, hot comprcssive strength >=
1500N/ ball, (hot temperature 1000 DEG C, temperature retention time 0.5h).
Comparative example 1
Metal iron powder, mixing and stirring is added in Iron Ore Powder；Weigh a certain amount of starch, sodium hydroxide and Borax,
Be firstly added suitable quantity of water and sodium hydroxide, Borax made solution, this solution backward in add starch, stirring mixing is all
Even；Or weigh a certain amount of sodium humate dry powder or polyvinyl alcohol dry powder；The binding agent of above-mentioned preparation is joined ferrum
In breeze and iron powder, mixing and stirring；Above-mentioned compound is prepared cooled agglomerated pellet through mixed grind, pelletizing or pressure ball.
Conclusion: (1) is prepared binding agent used by this cooled agglomerated pellet and added water and need to prepare in advance, and needs during preparing pelletizing again
Secondary add water to be impregnated with compound drench, the slightly aobvious complexity of preparation process；(2) pelletizing using the method to prepare has good
Cold strength, but its high temperature hot strength is more weak.
Comparative example 2
A kind of compound binding agent Han coal iron powder pellets, this binding agent is mainly by the modified humic acid ammonium of 30-50%, 5-15%
Starch, 40-60% cosolvent composition, this compound binding agent is powdered material.
Conclusion: first (1) this compound binding agent in use needs to add moisture makes it dissolve, and then binding agent is
Bonding and the effect of fastening can be played, moisture is relied on relatively big, the slightly aobvious complexity of preparation process；(2) this compound binding agent is only
Being applicable to room temperature cold conditions condition of molding, its high-temperature hot adhesion strength is relatively low.
Comparative example 3
A kind of Iron Ore Powder pellet binder and application thereof, the chemical composition of this pellet binder is: polyanion cellulose,
Xanthan gum, sesbania gum and Robinia pseudoacacia L. glue.The application of this iron powder pellets includes: first preparation containing binding agent, sodium carbonate and
Bentonitic mixture, then adds the mixture in Iron concentrate, and its addition accounts for the 0.9-1.1% of Iron concentrate quality,
It is subsequently adding a certain amount of moisture mix homogeneously, finally prepares pelletizing.
Conclusion: (1) this pellet binder is mainly polymer and the interpolation colloid material of nature extraction, and
Preparation process needs add moisture dissolve, the slightly aobvious complexity of preparation process；(2) pelletizing using this binding agent to prepare has
Good cold strength, but its high temperature hot strength is poor.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes
It is contained at least one embodiment or the example of the present invention.In this manual, need not pin to the schematic representation of above-mentioned term
To be identical embodiment or example.And, the specific features of description, structure, material or feature can be at any one
Or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the technology of this area
Personnel the feature of the different embodiments described in this specification or example and different embodiment or example can be combined and
Combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (9)
1. a ferronickel powder forming method, it is characterised in that including:
Ferronickel powder is mixed with waterglass and phosphoric acid, in order to obtain mixture；
Described mixture is heated；And
Described mixture after heating is carried out pressure ball process, in order to obtain ferronickel powder pelletizing.
Ferronickel powder forming method the most according to claim 1, it is characterised in that described mixing is carried out according to the following step:
In ferronickel powder, add waterglass and carry out the first mixing, in order to obtaining the first mixture；
In described first mixture, add phosphoric acid and carry out the second mixing, in order to obtaining the second mixture.
Ferronickel powder forming method the most according to claim 2, it is characterised in that adding of described waterglass and described phosphoric acid
Enter amount sum and be not more than described ferronickel powder 5 weight %.
Ferronickel powder forming method the most according to claim 3, it is characterised in that the described waterglass of addition and described phosphorus
Acid mass ratio is (5-8): (1-3).
Ferronickel powder forming method the most according to claim 1, it is characterised in that the temperature of described heating is 100-150
Degree Celsius.
Ferronickel powder forming method the most according to claim 1, it is characterised in that the time of described heating is that 0.5-1 is little
Time.
Ferronickel powder forming method the most according to claim 1, it is characterised in that described pressure ball processes and uses roll-in ball
Machine.
Ferronickel powder forming method the most according to claim 1, it is characterised in that described pressure ball processes the pressure used and is
11-15MPa。
Ferronickel powder forming method the most according to claim 1, it is characterised in that the comprcssive strength of described ferronickel powder pelletizing
>=300N/ ball, hot comprcssive strength >=1500N/ ball.
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| CN201610308961.8A CN105950863B (en) | 2016-05-11 | 2016-05-11 | Ferronickel powder forming method |
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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 |
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| 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 |
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