CN107245571A - A kind of ilmenite concentrate granulation hardening agent and a kind of prilling process of ilmenite concentrate - Google Patents
A kind of ilmenite concentrate granulation hardening agent and a kind of prilling process of ilmenite concentrate Download PDFInfo
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- CN107245571A CN107245571A CN201710570337.XA CN201710570337A CN107245571A CN 107245571 A CN107245571 A CN 107245571A CN 201710570337 A CN201710570337 A CN 201710570337A CN 107245571 A CN107245571 A CN 107245571A
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- CN
- China
- Prior art keywords
- ilmenite concentrate
- granulation
- hardening agent
- prilling
- shaping
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
Abstract
The invention provides a kind of hardening agent granulated for ilmenite concentrate, including：Polyvinyl alcohol, pitch and vegetable adhesive.Present invention also provides a kind of prilling process of ilmenite concentrate, comprise the following steps：Ilmenite concentrate is mixed with hardening agent, initial mixing material is obtained；The hardening agent includes polyvinyl alcohol, pitch and vegetable adhesive；The initial mixing material is granulated, ilmenite concentrate shaping wet granular is obtained；Ilmenite concentrate shaping wet granular is dried, ilmenite concentrate shaping dry particl is obtained.According to ilmenite concentrate hydrophobic property, the application is granulated using organic shaping hardening agent of complete physical bonds, the ilmenite concentrate particle prepared is set to be more than 90% in 1~5mm particle size content, drop strength is more than 5 times/m, efficiently solve the problems, such as airborne dust in ilmenite concentrate transhipment and electric furnace smelting process, normal smelting speed is ensure that, furnace equipment operating rate and material recovery rate is improved.
Description
Technical field
The present invention relates to metallurgical technology field, more particularly to a kind of ilmenite concentrate granulation hardening agent and a kind of ilmenite concentrate are made
Grain method.
Background technology
Electric furnace smelting acid-dissolved titanium slag typically uses ilmenite concentrate as raw material, and the floatation process of ilmenite concentrate causes its hydrophilic
Performance extreme difference, granularity are partially thin, and knowhow shows that ilmenite concentrate pretreatment of raw material effect is not good before electric furnace smelting, can only adopt at present
Enter stove with powder.
In production is actually smelted, on the one hand due to the meticulous size distribution of ilmenite concentrate, long-term existence directly enters electric furnace smelting
Refining causes fine powder material to enter flue with furnace gas, causes flue and furnace gas processing system to block influence production direct motion, and dust collecting system is born
The problems such as loading, material recovery rate decline；Another aspect fine powder material easily airborne dust in transport process is transported, is easily caused production ring
Border deteriorates and environmental issue.
In order to solve the above problems, Domestic Scientific Research personnel have carried out the research of ilmenite concentrate forming experiment.Ren Chaocheng etc. is 2000
Before and after year, the forming experiment research of micro-size fraction ilmenite concentrate is carried out, moulding process mainly includes dispensing, mixing, profit mill, pelletizing
With dry etc. 5 steps；Result of study shows, can obtain compression strength and be up to the pelletizing of 1700N/, but have three
Aspect problem：One be can not (moisture be too high, it is impossible to meets pelletizing requirement, needs predrying place directly using the wet ore deposit of produced on-site
Reason), two be during need add profit mill means, unit shaping cost increase；Three be use composite caking agent with addition of ratio mistake
Up to 6%, impurity therein will reduce pelletizing quality.
The Chinese patent of Application No. 201410119162.7 proposes the forming technique scheme of disk pelletizing, preferably solution
Having determined needs to handle ilmenite concentrate fine grinding before the formation problems of ilmenite concentrate, but shaping, and is mixed using polyacrylamide and calcium oxide
Compound shaping additive, calcium oxide will affect to titanium slag grade and later use.
In addition, also have using ball press technique in terms of ilmenite concentrate shaping research report, i.e., using pitch, bentonite, often
Liquid organic adhesive, conventional powder organic adhesive etc. of consolidating are advised as bonding agent compound material, balling ratio highest can reach
90%, 1500N/, conversion titanium slag grade reduction about 0.45% can be reached after pelletizing is dried under compression strength best conditions.But
It is that there are the following problems：The ilmenite concentrate pelletizing size that ball press technique is obtained is larger, the control of follow-up electric furnace smelting is proposed higher
Requirement；And ball press technique synthesis unit shaping cost is higher, initial estimate pelletizing pressure ball cost has reached 120 yuan/more than t.
The content of the invention
Present invention solves the technical problem that being the prilling process for providing a kind of ilmenite concentrate hardening agent and ilmenite concentrate, this Shen
The prilling process that please be provided solves the problems, such as the airborne dust in ilmenite concentrate transhipment and electric furnace smelting process.
In view of this, this application provides a kind of ilmenite concentrate granulation hardening agent, including polyvinyl alcohol, pitch and natural plant gum
Glutinous agent.
It is preferred that, the mass ratio of the polyvinyl alcohol, pitch and vegetable adhesive is (10~65)：(5~10)：(25~
85)。
It is preferred that, the vegetable adhesive in Arabic gum, pre-gelatinized starch and cellulose ether derivatives one
Plant or a variety of, the pitch is high temperature asphalt powder.
Present invention also provides a kind of prilling process of ilmenite concentrate, comprise the following steps：
Ilmenite concentrate is mixed with hardening agent, initial mixing material is obtained；The hardening agent includes polyvinyl alcohol, pitch and plant
Adhesive；
The initial mixing material is granulated, ilmenite concentrate shaping wet granular is obtained；
Ilmenite concentrate shaping wet granular is dried, ilmenite concentrate shaping dry particl is obtained.
It is preferred that, the granulation is carried out in cylindric prilling granulator, is put down on the prilling granulator inwall circumferencial direction
2~4 granulation reinforcing plates are distributed with, the granulation reinforcing plate and the line angle in the inwall center of circle are 45 °~75 °.
It is preferred that, air line distance of the one end away from inwall that the granulation reinforcing plate is not contacted with prilling granulator inwall is granulation
The 5%~12% of assembly dia, the length of the granulation reinforcing plate in the axial direction is the 25%~75% of prilling granulator length.
It is preferred that, the feed end of the prilling granulator is higher than discharge end, and angle of inclination is 3 °~7 °.
It is preferred that, the butt quality of the ilmenite concentrate is 100 with the mass ratio of the hardening agent：(1~2).
It is preferred that, the moisture of the initial mixing material is 12wt%~15wt%.
It is preferred that, the linear velocity of the prilling granulator cylinder inner wall of the granulation is 5~30cm/s；The temperature of the drying is
65~300 DEG C, the time is 5~50min.
This application provides a kind of ilmenite concentrate hardening agent, it includes polyvinyl alcohol, pitch and vegetable adhesive；It is therein
Polyvinyl alcohol and be to strengthen article shaped intensity, wherein polyethylene in the drying process after material granulation shaping with the effect of pitch
Alcohol can aid in granulating and forming；Vegetable adhesive is met viscosity after water and increased sharply, and physical bonds power greatly will not be hydrophobic by ilmenite concentrate
The influence of characteristic, can be achieved rapid shaping of the ilmenite concentrate material in prilling granulator, so as to ensure that ilmenite concentrate granulating and forming is imitated
Really, i.e., 1~5mm particle size content is more than 90%, and drop strength is more than 5 times/m.Further, in the prilling process of ilmenite concentrate
In, the application optimizes the internal structure of prilling granulator, improves the molding effect of ilmenite concentrate particle.
Brief description of the drawings
The prilling granulator structural representation for the ilmenite concentrate granulation that Fig. 1 provides for the present invention.
Embodiment
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, still
It should be appreciated that these descriptions are simply to further illustrate the features and advantages of the present invention, rather than to the claims in the present invention
Limitation.
The embodiment of the invention discloses a kind of ilmenite concentrate granulation hardening agent, including polyvinyl alcohol, pitch and plant gluing
Agent.
Above-mentioned ilmenite concentrate granulation hardening agent exists, this kind during ilmenite concentrate is granulated in the form of powdered solid
Form will not cause secondary pollution to granulation material.Polyvinyl alcohol in herein described ilmenite concentrate granulation hardening agent is in material
Played a role after granulating and forming, mainly strengthen article shaped intensity in the drying process, granulating and forming can be aided in；The polyvinyl alcohol
Source have no particular limits.The pitch is selected from high temperature asphalt powder in embodiment, and it is also in material granulation shaping
After play a role, mainly in the drying process strengthen article shaped intensity；Source the application of the pitch has no particular limits.
The vegetable adhesive is selected from organic species, specifically, the vegetable adhesive is selected from Arabic gum, pre-gelatinized starch and fibre
One or more in the plain ethers of dimension；It is met viscosity after water and increased sharply, and physical bond power is big, will not be by the hydrophobic spy of ilmenite concentrate
Property influence, rapid shaping of the ilmenite concentrate material in prilling granulator can be achieved, source the application of the vegetable adhesive does not have
There is special limitation.
Herein described ilmenite concentrate granulation is with the mass ratio of the polyvinyl alcohol in hardening agent, pitch and vegetable adhesive
(10~65)：(5~10)：(25~85), in a particular embodiment, the quality of the polyvinyl alcohol, pitch and vegetable adhesive
Than for (20~60)：(5~10)：(30~75).
Further, present invention also provides the prilling process of the ilmenite concentrate using above-mentioned hardening agent, comprise the following steps：
Ilmenite concentrate is mixed with hardening agent, initial mixing material is obtained；The hardening agent includes polyvinyl alcohol, pitch and plant
Adhesive；
The initial mixing material is granulated, ilmenite concentrate shaping wet granular is obtained；
Ilmenite concentrate shaping wet granular is dried, ilmenite concentrate shaping dry particl is obtained.
In above-mentioned prilling process, the application first mixes ilmenite concentrate with hardening agent, obtains initial mixing material.It is described strong
Agent is the hardening agent described in such scheme, herein without repeating.The mass ratio of the ilmenite concentrate and hardening agent is with ilmenite concentrate
Butt quality and the mass ratio of hardening agent represent that then the butt quality and the mass ratio of the hardening agent of the ilmenite concentrate are
100：(1~2), in some specific embodiments, the butt quality of the ilmenite concentrate is 100 with the mass ratio of the hardening agent：
(1.2~1.8)；The mass ratio of above-mentioned ilmenite concentrate and the hardening agent ensure that ilmenite concentrate granulating and forming effect.It is described initial
Moisture is 12%~15% in compound.
Then the application is granulated initial mixing material, obtains ilmenite concentrate shaping wet granular.The process of above-mentioned granulation is
Granulation mode well known to those skilled in the art, has no particular limits to this application.Herein described granulation is in granulation dress
Middle progress is put, the prilling granulator is cylindric prilling granulator.Prilling granulator has carried out structural adjustment described in the application preferred pair,
Further to improve the molding effect of ilmenite concentrate particle, the structural representation of the prilling granulator is as shown in Figure 1；Specifically, institute
State average mark on the cylinder inner wall circumferencial direction of prilling granulator and be furnished with 2~4 granulation reinforcing plates, granulation reinforcing plate with it is described
The line angle in the internal center of circle is 45 °~75 °, and above-mentioned set-up mode can strengthen granulation material and slide, unit interval increase thing
The internal relative contact product of material, is conducive to quick granulating and forming and makes shaping size controlling in certain scope.
Further, air line distance of the one end away from inwall that the granulation reinforcing plate is not contacted with prilling granulator inwall is institute
The 5%~12% of prilling granulator diameter is stated, the length of the granulation reinforcing plate in the axial direction is the prilling granulator length
25%~75%；The restriction of above-mentioned granulation reinforcing plate length makes prilling granulator that there is relatively excellent granulation material to slide reinforcing effect
Really.Specific setting of the granulation reinforcing plate in the prilling granulator is that connection is realized by way of welding, specifically
Connected mode is carried out according to mode well known to those skilled in the art, and this application is had no particular limits.
Herein described prilling granulator is rotated counterclockwise during granulation, and feed end is highly higher than discharge end, is tilted
Angle is 3 °~7 °, in a particular embodiment, and the angle of inclination is 4 °~6 °；Above-mentioned angle of inclination be granulating and forming particle diameter most
The excellent and maximized zone of reasonableness of production capacity.The linear velocity of the prilling granulator cylinder inner wall of herein described granulation is 5~30cm/s,
In a particular embodiment, the cylinder inner wall linear velocity is 8~25cm/s.
Then the application ilmenite concentrate shaping wet granular is dried, and obtains ilmenite concentrate shaping dry particl；Above-mentioned drying
Process can be dried in the con-ventional drying equipments such as drying grate, rotary kiln, and this application is had no particular limits.It is described
Dry temperature is 65~300 DEG C, and the time of the drying is 5~50min；In a particular embodiment, the temperature of the drying
For 100~250 DEG C.
In view of the shortcomings of the prior art, the hardening agent that the present invention is provided can solve ilmenite concentrate with prilling process and directly enter electric furnace
The airborne dust for smelting acid-dissolved titanium slag presence is big, and smelting process is easily influenceed the technique relatively low with material recovery rate by flue gas system blocking
Problem.The present patent application is not made individually to ilmenite concentrate raw material under the premise of the extra process such as profit mill, strict control granulation cost, innovation
Particle diameter and intensity are molded using physical bonds technical controlling ilmenite concentrate, airborne dust in ilmenite concentrate transhipment and electric furnace smelting process is solved and asks
Topic, it is ensured that normally smelt speed, improves furnace equipment operating rate and material recovery rate, the inventive method is to electric furnace smelting titanium essence
The pretreatment of ore deposit raw material has very important significance.Particle diameter 1mm~5mm scopes of ilmenite concentrate shaped granule prepared by the application
>=90%, under particle drop strength >=5 time/m indicator conditions, with preferably cost and production capacity advantage, and can be abundant relatively
Meet the raw material granularity and intensity requirement of follow-up electric furnace smelting.
For a further understanding of the present invention, the prilling process of the ilmenite concentrate provided with reference to embodiment the present invention is carried out
Describe in detail, protection scope of the present invention is not limited by the following examples.
Flotation large sample of the ilmenite concentrate in normal production in following each embodiments, does not apply extra profit mill processing
Measure, highest nature moisture about 9.3%.
Embodiment 1
By ilmenite concentrate and hardening agent according to ilmenite concentrate butt quality and hardening agent mass ratio 100：1.8 are sufficiently mixed with adduction
Uniformly, compound is obtained, compound final moisture content 12.5%, hardening agent composition is polyvinyl alcohol：Mid temperature pitch powder：Plant
Adhesive=20：5：75；
Above-mentioned compound is made on the Granulation Equipments that a diameter of 700mm, length are 2500mm, inclination angle is 4 °
Grain, obtains ilmenite concentrate shaping wet granular；The rotation linear velocity 8cm/s of Granulation Equipments cylinder inner wall, granulation reinforcing plate not with granulation
Air line distance of the one end away from inwall of device inwall contact is 55mm, and the granulation reinforcing plate is in the upward length of Cylindorical rod
1800mm, the line angle with the internal center of circle is 60 °, the number of the granulation reinforcing plate for 3 pieces (in cylindrical barrel 120 ° it is symmetrical
Distribution)；
Ilmenite concentrate shaping wet granular is passed through 100 DEG C of flue gas dryings of rotary kiln, ilmenite concentrate granulating and drying particle is finally given,
Mass ratio reaches 94.5%, the average 9.3 times/m of drop strength in the range of its particle diameter 1mm~5mm.
Embodiment 2
By ilmenite concentrate and hardening agent according to ilmenite concentrate butt quality and hardening agent mass ratio 100：1.4 are sufficiently mixed with adduction
Uniformly, compound is obtained, compound final moisture content 14.5%, hardening agent composition is polyvinyl alcohol：Mid temperature pitch powder：Plant
Adhesive=60：10：30；
Above-mentioned compound is made on the Granulation Equipments that a diameter of 700mm, length are 2500mm, inclination angle is 5.5 °
Grain, obtains ilmenite concentrate shaping wet granular；The rotation linear velocity 25cm/s of Granulation Equipments cylinder inner wall, granulation reinforcing plate not with granulation
Air line distance of the one end away from inwall of device inwall contact is 40mm, and the granulation reinforcing plate is in the upward length of Cylindorical rod
900mm, the line angle with the internal center of circle is 65 °, the number of the granulation reinforcing plate for 2 pieces (in cylindrical barrel 180 ° it is symmetrical
Distribution)；
Ilmenite concentrate shaping wet granular is passed through 210 DEG C of flue gas dryings of rotary kiln, ilmenite concentrate granulating and drying particle is finally given,
Mass ratio reaches 90.5%, the average 6.0 times/m of drop strength in the range of its particle diameter 1mm~5mm.
Comparative example 1
Contrasted with embodiment 1, this comparative example is used to confirm the granulating and forming effect of hardening agent.Technical controlling parameter is with implementing
Example 1 is basically identical, and difference is：Hardening agent is that mass ratio is 9：1 polyacrylamide and calcium oxide, ilmenite concentrate butt quality with
The mass ratio 100 of hardening agent：1.8.Mass ratio is only in the range of final ilmenite concentrate granulating and drying grain diameter 1mm~5mm
38.6%, 4.7 times/m of drop strength average out to.
Comparative example 2
Contrasted with embodiment 1, this comparative example is used to prove the granulating and forming effect of this shaped device.Technical controlling parameter with
Embodiment 1 is basically identical, and difference is：Former is changed to a diameter of 700mm conventional smooth inner wall without granulation reinforcing plate
Mass ratio is only 56.3% in the range of structure type, final ilmenite concentrate granulating and drying grain diameter 1mm~5mm, and correspondence is fallen
Strength Changes are little, 8.9 times/m of average out to.
The explanation of above example is only intended to the method and its core concept for helping to understand the present invention.It should be pointed out that pair
, under the premise without departing from the principles of the invention, can also be to present invention progress for those skilled in the art
Some improvement and modification, these are improved and modification is also fallen into the protection domain of the claims in the present invention.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (10)
1. a kind of ilmenite concentrate granulation hardening agent, including polyvinyl alcohol, pitch and vegetable adhesive.
2. ilmenite concentrate granulation hardening agent according to claim 1, it is characterised in that the polyvinyl alcohol, pitch and plant
The mass ratio of thing adhesive is (10~65)：(5~10)：(25~85).
3. ilmenite concentrate granulation hardening agent according to claim 1, it is characterised in that the vegetable adhesive is selected from me
One or more in primary glue, pre-gelatinized starch and cellulose ether derivatives, the pitch is high temperature asphalt powder.
4. a kind of prilling process of ilmenite concentrate, comprises the following steps：
Ilmenite concentrate is mixed with hardening agent, initial mixing material is obtained；The hardening agent includes polyvinyl alcohol, pitch and plant gluing
Agent；
The initial mixing material is granulated, ilmenite concentrate shaping wet granular is obtained；
Ilmenite concentrate shaping wet granular is dried, ilmenite concentrate shaping dry particl is obtained.
5. prilling process according to claim 4, it is characterised in that the granulation is entered in cylindric prilling granulator
OK, average mark is furnished with 2~4 granulation reinforcing plates on the prilling granulator inwall circumferencial direction, granulation reinforcing plate with it is described
The line angle in the inwall center of circle is 45 °~75 °.
6. prilling process according to claim 5, it is characterised in that the granulation reinforcing plate does not connect with prilling granulator inwall
Air line distance of the tactile one end away from inwall is the 5%~12% of prilling granulator diameter, the length of the granulation reinforcing plate in the axial direction
Spend for the 25%~75% of prilling granulator length.
7. prilling process according to claim 4, it is characterised in that the feed end of the prilling granulator is higher than discharge end,
Angle of inclination is 3 °~7 °.
8. the prilling process according to any one of claim 4~7, it is characterised in that the butt quality of the ilmenite concentrate with
The mass ratio of the hardening agent is 100：(1~2).
9. the prilling process according to any one of claim 4~7, it is characterised in that the moisture of the initial mixing material contains
Measure as 12wt%~15wt%.
10. the prilling process according to any one of claim 4~7, it is characterised in that the prilling granulator cylinder of the granulation
The linear velocity of inwall is 5~30cm/s；The temperature of the drying is 65~300 DEG C, and the time is 5~50min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710570337.XA CN107245571B (en) | 2017-07-13 | 2017-07-13 | A kind of a kind of ilmenite concentrate granulation prilling process of hardening agent and ilmenite concentrate |
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| CN107245571B CN107245571B (en) | 2019-04-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107699687A (en) * | 2017-10-16 | 2018-02-16 | 攀钢集团攀枝花钢铁研究院有限公司 | The method of granulating of ilmenite concentrate and ilmenite concentrate binding agent |
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| CN101649392A (en) * | 2009-09-23 | 2010-02-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Pelletizing method of ilmenite concentrates and pellet binder |
| CN201959772U (en) * | 2010-12-31 | 2011-09-07 | 太原海力丰科技发展有限公司 | Rotary-drum granulator with fluidized bed |
| CN102399994A (en) * | 2011-11-18 | 2012-04-04 | 攀钢集团研究院有限公司 | Titanium slag smelting method |
| CN103898317A (en) * | 2012-12-28 | 2014-07-02 | 攀钢冶金材料有限责任公司 | Binding agent composition for titanium concentrate pelletizing and method for preparing titanium concentrate pellet |
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2017
- 2017-07-13 CN CN201710570337.XA patent/CN107245571B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101649392A (en) * | 2009-09-23 | 2010-02-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Pelletizing method of ilmenite concentrates and pellet binder |
| CN201959772U (en) * | 2010-12-31 | 2011-09-07 | 太原海力丰科技发展有限公司 | Rotary-drum granulator with fluidized bed |
| CN102399994A (en) * | 2011-11-18 | 2012-04-04 | 攀钢集团研究院有限公司 | Titanium slag smelting method |
| CN103898317A (en) * | 2012-12-28 | 2014-07-02 | 攀钢冶金材料有限责任公司 | Binding agent composition for titanium concentrate pelletizing and method for preparing titanium concentrate pellet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107699687A (en) * | 2017-10-16 | 2018-02-16 | 攀钢集团攀枝花钢铁研究院有限公司 | The method of granulating of ilmenite concentrate and ilmenite concentrate binding agent |
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| CN107245571B (en) | 2019-04-09 |
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