CN102337395A - Bentonite cellulose ether iron ore pellet additive, and preparation method and application thereof - Google Patents
Bentonite cellulose ether iron ore pellet additive, and preparation method and application thereof Download PDFInfo
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- CN102337395A CN102337395A CN2011101461976A CN201110146197A CN102337395A CN 102337395 A CN102337395 A CN 102337395A CN 2011101461976 A CN2011101461976 A CN 2011101461976A CN 201110146197 A CN201110146197 A CN 201110146197A CN 102337395 A CN102337395 A CN 102337395A
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Abstract
The invention discloses a bentonite cellulose ether iron ore pellet additive, and a preparation method and application thereof, and belongs to the field of metallurgy. The pellet additive is prepared from the following raw materials: cellulose ether, iron powder, starch ether and sodium bentonite; and the preparation method comprises the following steps of: grinding the cellulose ether and the iron powder to obtain a component 1; grinding the starch ether and the sodium bentonite to obtain a component 2; and mixing the component 1 and the component 2, and continuously grinding to obtain the pellet additive. The bentonite cellulose ether iron ore pellet additive has excellent adhesive property and wrapping property, can effectively improve the physical properties and metallurgical properties of finished pellets, comprehensively improve the total iron grade, quality and yield of the finished pellets and also can effectively reduce production cost and energy consumption, and is suitable for large-scale industrial production.
Description
Technical field
The present invention relates to a kind of pellet binder used in metallurgy, relate in particular to a kind of wilkinite ether of cellulose iron ore pellet additive that is used to produce iron ore pellets and preparation method thereof, the invention belongs to the sticker field of iron ore pellets.
Background technology
Sticker is that fine iron breeze is processed the indispensable important component of pelletizing, well behaved sticker for the quality that improves pellet and ironmaking economic and technical norms, promote energy-saving and cost-reducing and realize that environmental friendliness etc. will play important effect.In order to realize above-mentioned technique effect, require sticker to have good cohesiveness and balling-up property, the green-ball of making should have the good capability of antidetonance, higher does, wet bulb resistance to compression and dropping strength; After the roasting finished ball not only metallurgical performance such as physicals such as its ultimate compression strength, tumbler index, sieve powder index and reduction swellability coefficient, reduction degree, reduction and pulverization ratio, reflowing temperature can satisfy the requirement of blast furnace ironmaking, and should have higher ferrous grade.
According to the source, the existing sticker that is used for iron ore pellets can be divided into mineral binder bond, organic binder bond, inorganic/several types such as organic composite type sticker.Up to now, the domestic and international sticker that has been used for iron ore pellets mainly contains mineral binder bonds such as water glass, slaked lime, cement, clay, wilkinite, zeyssatite alkali metal cpd and salt; Ether of cellulose, starch ethers, humic acids, xylonic acid,, organic binder bond such as KLP, Aleotac, peridur; With the wilkinite is the organic/inorganic complex adhesive of staple.
Organic binder bonds such as ether of cellulose, starch ethers, humic acids, xylonic acid, KLP, Aleotac, peridur have good cohesiveness and balling-up property; When high temperature, can burn and remove; Therefore the impurity of bringing pelletizing into is few, and the pelletizing grade is higher, and finished ball has reducing property preferably.But the price of this type organic binder bond (especially ether of cellulose) is very high, causes production cost too high.
Mierocrystalline cellulose is a kind of not fused poly-hydroxy macromolecular compound that neither dissolves also.Mierocrystalline cellulose then can be water-soluble after etherificate, dilute alkaline soln and organic solvent, and to have thermoplastic cellulose ether be the macromolecular compound of being processed by Mierocrystalline cellulose with ether structure.Each glucose basic ring contains three hydroxyls in the cellulose macromolecule, the secondary hydroxyl on the primary hydroxyl on the 6th carbon atom, second and third carbon atom, and the hydrogen in the hydroxyl is generated the ether of cellulose analog derivative by hydrocarbyl substituted.Cellulose dissolution performance generation noticeable change after etherificate is dissolvable in water water, diluted acid, diluted alkaline or organic solvent.
The adhesive property of ether of cellulose depends on its water solubility, and its ability that heals is sufficient and water is molten, and its cohesiveness is with regard to the height of healing.When using, need ether of cellulose be crushed to particulate (more than 60 orders) competence exertion and go out its adhesive property as sticker.During particle diameter below ether of cellulose is 600 orders, its central volume (account for its TV 70%) part still is solid, and this solid part has stronger force of cohesion, and the non-constant of its solubility property can dissolve with water and expand and then not have bond performance.Only the peripheral portion of its particle periphery (account for its TV 30%) is fluffy state and has very high water-solublely, and can fully mix to expand with water be able to give play to bond performance.Making in the ball process of iron ore pellets; The consumption of the water that is added has its strict regulation; Add entry total amount only account for total mass 25-30% (divide two stages to add: when additive is mixed with iron ore extract powder mutually, add the 8.5-10% that entry accounts for total mixing total mass; Making the ball stage in the rolling disk machine; Add the 16.5-20% that entry accounts for total mixing total mass); And whole make the ball process only have 12 fens of short clock times (with additive and iron ore extract powder mutually the blended time be about 3-4 minute, the ball time of making in the rolling disk machine is about 8-9 minute subsequently).At the particle diameter of ether of cellulose under the situation below 600 orders; The centre portions that accounts for its TV 70% is solid phase, has extremely strong force of cohesion, in the so short time, possibly not dissolve with water; Thereby can not give play to due adhesive property; Not only waste raw material greatly, also reduced the viscosity of pelletizing greatly, and then reduced finished ball intensity and the full iron grade of finished ball.If can ether of cellulose be crushed to 600-2000 order (especially 1000 orders-2000 order), its centre portions also is fluffy mobile liquid phase state, has very strong water avidity, has very strong viscosity and parcel performance thereby mix behind the chance water to expand.
When ether of cellulose being adopted equipment such as kibbler or micronizer pulverize; Because the violent each other friction of ether of cellulose can produce great amount of heat, in case temperature reaches 80 ℃, it is many below 90 orders to assemble the agglomerating particle diameter of resulting cellulose ether particle that causes between the ether of cellulose in a large number; Seldom can reach the above particle diameter of 600 orders; More difficulty reaches more than 1000 orders, and this has not only wasted raw material greatly and has improved production cost, has also significantly reduced the physicals and the metallurgical performance of pellet finished ball; Can not satisfy the blast furnace technology requirement, thereby be difficult to large-scale promotion application in industry.
Summary of the invention
Technical problem to be solved by this invention is to overcome when adopting ether of cellulose as the staple of pellet sticker; Defective such as existing production cost is too high, the physicals of pellet finished ball and metallurgical performance are relatively poor; A kind of new iron ore pellets iron powder sticker is provided; This sticker with the ultra micro ether of cellulose as its main sticker composition; Have that production cost is low, adhesive property is strong, can effectively improve green ball strength and burst temperature, and then significantly improve full iron grade of finished ball and quality.
Technical problem to be solved by this invention realizes through following technical scheme:
A kind of wilkinite ether of cellulose iron ore pellet additive comprises that following each component processes:
Ether of cellulose, iron powder, starch ethers and sodium bentonite;
In order to reach better technique effect, preferred, the weight part of each component is: ether of cellulose 5-30 part, iron powder 1-12 part, starch ethers 90-180 part and sodium bentonite 500-1200 part;
Preferred, the weight part of each component is: ether of cellulose 8-25 part, iron powder 3-10 part, starch ethers 100-160 part, sodium bentonite 600-1000 part;
Further preferred, the weight part of each component is: ether of cellulose 12-20 part, iron powder 5-10 part, starch ethers 120-150 part, sodium bentonite 700-900 part;
Most preferred, the weight part of each component is: 15 parts of ether of cellulose, 7.5 parts of iron powders, 135 parts of starch etherss, 850 parts of sodium bentonites.
Iron powder described in the present invention can be to make used raw material-fine iron breeze in the ball process at pelletizing; Also can be the iron powder in other source, for example, iron powder of the present invention can also be that iron ore is pulverized the back (as for being crushed to great order degree; Situation that can equipment and deciding; Do not have special requirement,, be preferably the 10-200 order for reaching best effect) resultant powder; Described iron ore can be iron ores such as the silicate mine, pyrites of magnetite, rhombohedral iron ore, limonite, spathic iron ore, iron; Also can be with pulverizing the resulting powder in back at remaining mine tailing of ore dressing process or tailings at iron ore; These products all can be in order to substitute iron powder and to have essentially identical effect.
Described cellulose ethers is preferably alkyl cellulose ether (like methyl cellulose ether, cellulose ether); Carboxyl alkyl cellulose ether (like TYLOSE 30000, carboxylic propyl methocel ether); Hydroxyalkyl cellulose ether (like hydroxypropylcelluloether ether, hydroxyethyl ether cellulose, hydroxyethylmethyl-cellulose ether) etc.
Described starch ethers can also be a plant amylum, for example: W-Gum, potato starch (yam, Ipomoea batatas etc.) for hydroxyethylamyle, hydroxypropylated starch, allyl starch or sodium starch glycolate etc.
The used raw material of the present invention all can obtain from domestic and international Chemical market, and its specification meets industry standard and gets final product.
Another technical problem to be solved by this invention provides a kind of method for preparing above-mentioned wilkinite ether of cellulose iron ore pellet additive.
Another technical problem to be solved by this invention realizes through following technological approaches:
A kind of preparation method who is used to produce the wilkinite ether of cellulose iron ore pellet additive of pellet comprises step:
(1) ether of cellulose and iron powder are joined in the kibbler, pulverize, obtain component 1;
(2) starch ethers and sodium bentonite are joined in the kibbler pulverize, obtain component 2;
(3) it is broken component 1 to be joined component 2 relaying continued powders, promptly gets.
Wherein, the pulverizing time described in the step (1) is preferably 30-60 minute, more preferably 40 minutes;
The pulverizing time described in the step (2) is preferably 10-30 minute, more preferably 20 minutes;
The pulverizing time described in the step (3) is preferably 5-20 minute, more preferably 10 minutes.
Described kibbler can be disintegrating apparatus such as supper micron mill, micronizer, and these equipment all can be bought from commercial sources and obtain, and for example: go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 " or " HGM10027 ".
The inventor finds through lot of test, iron powder is mixed to join in the kibbler as carrier and ether of cellulose pulverizes, and mainly has the beneficial effect of following several respects:
1, iron powder has excellent heat absorption and heat conductivility; The heat that can be produced because of the height friction with because of comminuted cellulosic ether the time in time adsorbs and is transmitted on the shell of kibbler and in the atmosphere around further being transmitted to; Therefore can the temperature of cellulose ether particle be controlled at 30-50 ℃ when pulverizing; It is too high and cause cellulose ether particle to assemble agglomerating phenomenon effectively to have solved Yin Wendu; Thereby ether of cellulose all is crushed to 600-2000 purpose particle, has not only avoided wasting raw material, reduced production cost greatly; And because resultant cellulose ether particle many at the 1000-2000 order; It has very large surface-area and forms the molecule chain alive of fully unfolding; Its water absorbing properties significantly rises, and in the just water-swelling rapidly in the time of short several minutes, its volume expands tens of times and have extremely strong viscosity; Thereby has extremely strong parcel performance; Can more fully the smart powder of the pig iron be wrapped up firmly, greatly improve the viscosity of green-ball and then effectively improve green ball strength and burst temperature, finally significantly improve full iron grade of finished ball and quality.
2, the hardness of iron powder is higher; When running up, has certain cutting action; Can contact with ether of cellulose fully or mix, guarantee that obtain particle diameter is the ultra micro cellulose ether particle more than 600 orders thereby in kibbler or micronizer, can ether of cellulose be cut through running up.
3, iron powder is one of raw material of making by ball, and ether of cellulose volatilizees when high temperature fully; These two kinds of raw materials all do not bring any impurity or objectionable impurities to pelletizing, and two kinds of raw materials can both be made the best use of everything, and have not only reduced production cost to greatest extent, can also effectively improve full iron grade of finished ball and quality.
If the viscosity of pellet binder is too high, quick-fried ball phenomenon then appears easily; If if viscosity is low excessively, then the resistance to compression of green-ball and intensity are lower, cause the physicals of pellet finished ball and metallurgical performance relatively poor.The starch ether material is low viscous substance, and the ultra micro ether of cellulose is a high viscosity substance; Resulting pellet binder was moderate viscosity after the present invention carried out compatibility with the ultra micro ether of cellulose of high viscosity and low-viscosity starch ether material; Be not easy to produce quick-fried ball phenomenon with the prepared green-ball of sticker of the present invention; And the resistance to compression and the intensity of green-ball are higher, and the physicals of pellet finished ball and metallurgical performance are very excellent.
The present invention finds through experiment; With sodium bentonite by 200 littleization of order to 1000 orders, its rate of expansion will increase 4.5-5 doubly, be geometricprogression raising surface-area and parcel ability; Can absorb a large amount of moisture and then expansion rapidly in the time at short several minutes; Have extremely strong bond performance and parcel performance, in can fully effectively iron powder being wrapped in firmly, thereby significantly improve the physicals and the metallurgical performance of pelletizing.
The method of use of wilkinite ether of cellulose iron ore pellet additive of the present invention: (this ratio can be grasped according to practical situation by those skilled in the art flexibly in proportion with additive of the present invention; Preferably; Add the sticker of the present invention of 10Kg in the fine iron breeze per ton) add in the fine iron breeze, fully just can directly be used for pelletizer after the homogenizing and make ball.
The beneficial effect that wilkinite ether of cellulose iron ore pellet additive of the present invention mainly has following several respects:
1, the present invention carries out the ultramicronising processing with ether of cellulose and starch ethers; Mostly its grade is the 1000-2000 order; Have great specific surface area and water-retaining capacity, absorbing water just to be converted into the liquid phase state of viscosity in 2-2.5 minute rapidly by solid phase, had excellent bond performance and parcel performance; The physicals of effective raising pellet finished ball and metallurgical performance (green ball strength and burst temperature) etc., the final purpose that realizes significantly improving the full iron grade of finished ball, quality and productive rate.
2, wilkinite ether of cellulose iron ore pellet additive of the present invention has also reduced production cost significantly when improving the full iron grade of finished ball, quality and productive rate; Greatly reduce energy consumption; It is burnt to make blast furnace reach the raising the output joint; Reduce environmental pollution, the purpose of increasing economic efficiency is suitable for large-scale commercial prodn.
3, do not contain any impurity or objectionable impurities in the wilkinite ether of cellulose iron ore pellet additive of the present invention, can significantly promote the pellet ferrous grade.
Embodiment
Further describe the present invention below in conjunction with specific embodiment, advantage of the present invention and characteristics will be more clear along with description.But these embodiment only are exemplary, scope of the present invention are not constituted any restriction.It will be understood by those skilled in the art that and down can make amendment with form or replace without departing from the spirit and scope of the present invention, but these modifications and replacing all fall in protection scope of the present invention the details of technical scheme of the present invention.
Used various ether of cellulose and starch ethers are all available from Feicheng, Shandong Province letter Rui Jingxicailiaochang among
the present invention.
The preparation of embodiment 1 wilkinite ether of cellulose iron ore pellet additive
Take by weighing each raw material (unit: kg): methyl cellulose ether 15kg, iron powder 7.5 kg, hydroxyethylamyle 135 kg, sodium bentonite 850 kg by following weight part;
Iron powder and methyl cellulose ether joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverized 40 minutes, obtain component 1; The particle of the methyl cellulose ether in the component 1 all is a 600-2000 order particle, and wherein most of particle grain size distribution is at the 1000-2000 order;
Hydroxyethylamyle and sodium bentonite joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverize 20 minutes, obtain component 2 to 800 orders;
Component 1 and component 2 are mixed in kibbler, continue to pulverize 10 minutes, promptly get.
The preparation of embodiment 2 wilkinite ether of cellulose iron ore pellet additives
Take by weighing each raw material (unit: kg): cellulose ether 5kg, iron powder 1kg, hydroxypropylated starch 90kg, sodium bentonite 500 kg by following weight part;
Iron ore extract powder and cellulose ether joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverized 40 minutes, obtain component 1; The particle of the cellulose ether in the component 1 all is a 600-2000 order particle, and wherein most of particle grain size distribution is at the 1000-2000 order;
Hydroxypropylated starch and sodium bentonite joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverize 20 minutes, obtain component 2 to 800 orders;
Component 1 and component 2 are mixed in kibbler, continue to pulverize 10 minutes, promptly get.
The preparation of embodiment 3 wilkinite ether of cellulose iron ore pellet additives
Take by weighing each raw material (unit: kg): TYLOSE 30000 30kg, iron powder 12kg, allyl starch 190 kg, sodium bentonite 1200 kg by following weight part;
Ground hematite is broken to behind 100 orders to join in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") with TYLOSE 30000 pulverized 40 minutes, obtain component 1; The particle of the TYLOSE 30000 in the component 1 all is a 600-2000 order particle, and wherein most of particle grain size distribution is at the 1000-2000 order;
Allyl starch and sodium bentonite joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverize 20 minutes, obtain component 2 to 800 orders;
Component 1 and component 2 are mixed in kibbler, continue to pulverize 10 minutes, promptly get.
The preparation of embodiment 4 wilkinite ether of cellulose iron ore pellet additives
Take by weighing each raw material (unit: kg): carboxylic propyl methocel ether 12kg, iron powder 5 kg, sodium starch glycolate 120 kg, sodium bentonite 700 kg by following weight part;
The mine tailing that obtains in the limonite ore dressing is broken to 200 orders and carboxylic propyl methocel ether joins in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") and pulverized 40 minutes, obtain component 1; The particle of the carboxylic propyl methocel ether in the component 1 all is a 600-2000 order particle, and wherein most of particle grain size distribution is at the 1000-2000 order;
Sodium starch glycolate and sodium bentonite joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverize 20 minutes, obtain component 2 to 800 orders;
Component 1 and component 2 are mixed in kibbler, continue to pulverize 10 minutes, promptly get.
The preparation of embodiment 5 wilkinite ether of cellulose iron ore pellet additives
Take by weighing each raw material (unit: kg): hydroxypropylcelluloether ether 20kg, iron powder 10kg, W-Gum 150 kg, sodium bentonite 900 kg by following weight part;
Iron powder and hydroxypropylcelluloether ether joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverized 40 minutes, obtain component 1; The particle of the hydroxypropylcelluloether ether in the component 1 all is a 600-2000 order particle, and wherein most of particle grain size distribution is at the 1000-2000 order;
W-Gum and sodium bentonite joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverize 20 minutes, obtain component 2 to 800 orders;
Component 1 and component 2 are mixed in kibbler, continue to pulverize 10 minutes, promptly get.
The preparation of embodiment 6 wilkinite ether of cellulose iron ore pellet additives
Take by weighing each raw material (unit: kg): hydroxyethyl ether cellulose 12kg, iron powder 10kg, sweet potato starch 135 kg, sodium bentonite 900 kg by following weight part;
Iron powder and hydroxyethyl ether cellulose joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverized 40 minutes, obtain component 1; The particle of the hydroxyethyl ether cellulose in the component 1 all is a 600-2000 order particle, and wherein most of particle grain size distribution is at the 1000-2000 order;
Sweet potato starch and sodium bentonite joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverize 20 minutes, obtain component 2 to 800 orders;
Component 1 and component 2 are mixed in kibbler, continue to pulverize 10 minutes, promptly get.
The effect test of Test Example 1 wilkinite ether of cellulose iron ore pellet additive of the present invention
One, test materials
Supply the prepared additive of test agent: embodiment of the invention 1-6.
Two, TP:
All tests are carried out on pelletizing plant's pellet production line, add additive of the present invention the influence of finished ball nodulizing is tested.The former iron powder in every 4.9kg Anshan (water ratio: 5.86%) add prepared additive 50g of embodiment of the invention 1-6 and clear water 150g respectively and make ball test(ing);
Three, test-results
Test-results is following:
1, shatter strength of green pellet (10,0.5m does not do more than 10 times):
1*0+2*0+3*0+4*0+5*0+6*0+7*0+8*0+9*0+10*0
MV is greater than 10 times;
2, green-ball pressure (N, 10): 14.2,13.8,13.48,13.9,13.7,14.52,14.2,13.5,13.78,13.6; MV (N): 13.86.
3, green-ball burst test (516 ℃, 5min, 50): 0.
4, ripe ball pressure (N): MV is greater than 3400N (newton).
In a word, use that pellet physical strength (dropping strength, ultimate compression strength) and anti-spalling all are improved to a certain extent behind the additive of the present invention, pellet grade has remarkable lifting, and using it for blast furnace ironmaking can effectively save production cost.
The comparative example 1
Take by weighing each raw material (unit: kg): methyl cellulose ether 15kg, hydroxyethylamyle 135 kg, sodium bentonite 850 kg by following weight part;
Methyl cellulose ether joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverized 40 minutes, obtain component 1; Through detecting, the particle of the methyl cellulose ether in the component 1 is mainly 20-90 order particle, has only the grain diameter of few part to reach more than 600 orders;
Hydroxyethylamyle and sodium bentonite joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverize 20 minutes, obtain component 2 to 800 orders;
Component 1 and component 2 are mixed in kibbler, continue to pulverize 10 minutes, promptly get.
The comparative example 2
Take by weighing each raw material (unit: kg): cellulose ether 5kg, hydroxypropylated starch 90kg, sodium bentonite 500 kg by following weight part;
Cellulose ether joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverized 40 minutes, obtain component 1; Through detecting, the particle of the methyl cellulose ether in the component 1 is mainly 40-90 order particle, has only the grain diameter of few part to reach more than 600 orders;
Hydroxypropylated starch and sodium bentonite joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverize 20 minutes, obtain component 2 to 800 orders;
Component 1 and component 2 are mixed in kibbler, continue to pulverize 10 minutes, promptly get.
The comparative example 3
Take by weighing each raw material (unit: kg): TYLOSE 30000 30kg, allyl starch 190 kg, sodium bentonite 1200 kg by following weight part;
TYLOSE 30000 joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverized 40 minutes, obtain component 1; Through detecting, the particle of the methyl cellulose ether in the component 1 is mainly 20-90 order particle, has only the grain diameter of few part to reach more than 600 orders;
Allyl starch and sodium bentonite joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverize 20 minutes, obtain component 2 to 800 orders;
Component 1 and component 2 are mixed in kibbler, continue to pulverize 10 minutes, promptly get.
The comparative example 4
Take by weighing each raw material (unit: kg): carboxylic propyl methocel ether 12kg, sodium starch glycolate 120 kg, sodium bentonite 700 kg by following weight part;
Carboxylic propyl methocel ether joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverized 40 minutes, obtain component 1; Through detecting, the particle of the methyl cellulose ether in the component 1 is mainly 20-90 order particle, has only the grain diameter of few part to reach more than 600 orders;
Sodium starch glycolate and sodium bentonite joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverize 20 minutes, obtain component 2 to 800 orders;
Component 1 and component 2 are mixed in kibbler, continue to pulverize 10 minutes, promptly get.
The comparative example 5
Take by weighing each raw material (unit: kg): hydroxypropylcelluloether ether 20kg, W-Gum 150 kg, sodium bentonite 900 kg by following weight part;
Hydroxypropylcelluloether ether joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverized 40 minutes, obtain component 1; Through detecting, the particle of the methyl cellulose ether in the component 1 is mainly 20-90 order particle, has only the grain diameter of few part to reach more than 600 orders;
W-Gum and sodium bentonite joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverize 20 minutes, obtain component 2 to 800 orders;
Component 1 and component 2 are mixed in kibbler, continue to pulverize 10 minutes, promptly get.
The comparative example 6
Take by weighing each raw material (unit: kg): hydroxyethyl ether cellulose 12kg, sweet potato starch 135 kg, sodium bentonite 900 kg by following weight part;
Hydroxyethyl ether cellulose joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverized 40 minutes, obtain component 1; Through detecting, the particle of the methyl cellulose ether in the component 1 is mainly 40-90 order particle, has only the grain diameter of few part to reach more than 600 orders;
Sweet potato starch and sodium bentonite joined in the micronizer (go up the micronizer that the Taiwan Strait Exchange Association can mechanical ltd produces, its model is " HGM8021 ") pulverize 20 minutes, obtain component 2 to 800 orders;
Component 1 and component 2 are mixed in kibbler, continue to pulverize 10 minutes, promptly get.
The effect test of the prepared sticker of Test Example 2 comparative examples
One, test materials
Supply test agent: the prepared additive of comparative example 1-6 of the present invention.
Two, TP
All tests are carried out on pelletizing plant's pellet production line, the former iron powder in every 4.9kg Anshan (water ratio: 5.86%) add prepared additive 50g of comparative example 1-6 and clear water 150g respectively and make ball test(ing);
Three, test-results
Test-results is following:
1, shatter strength of green pellet (10,0.5m does not do more than 10 times):
1*0+2*0+3*1+4*0+5*0+6*1+7*6+8*1+9*1+10*2
MV 6 times;
2, green-ball pressure (N, 10): 9.4,9.8,10.2,9.5,10.6,8.96,9.18,8.94,10.8,8.87; MV (N): 9.625.
3, green-ball burst test (516 ℃, 5min, 50): 4.
4, ripe ball pressure (N): MV is 2200N.
Claims (10)
1. a wilkinite ether of cellulose iron ore pellet additive is characterized in that, comprises that following raw material processes: ether of cellulose, iron powder, starch ethers and sodium bentonite.
2. according to the described wilkinite ether of cellulose of claim 1 iron ore pellet additive, it is characterized in that the weight part of each component is: ether of cellulose 5-30 part, iron powder 1-12 part, starch ethers 90-180 part and sodium bentonite 500-1200 part.
3. according to the described wilkinite ether of cellulose of claim 2 iron ore pellet additive, it is characterized in that the weight part of each component is: ether of cellulose 8-25 part, iron powder 3-10 part, starch ethers 100-160 part, sodium bentonite 600-1000 part; Preferably, the weight part of each component is: ether of cellulose 12-20 part, iron powder 5-10 part, starch ethers 120-150 part, sodium bentonite 700-900 part; Further preferred, the weight part of each component is: 15 parts of ether of cellulose, 7.5 parts of iron powders, 135 parts of starch etherss, 850 parts of sodium bentonites.
4. according to any one described wilkinite ether of cellulose iron ore pellet additive of claim 1-3, it is characterized in that: described ether of cellulose is selected from alkyl cellulose ether, carboxyl alkyl cellulose ether or hydroxyalkyl cellulose ether.
5. according to any one described wilkinite ether of cellulose iron ore pellet additive of claim 1-3, it is characterized in that: described starch ethers is selected from hydroxyethylamyle, hydroxypropylated starch, allyl starch, sodium starch glycolate or plant amylum; Preferably, described plant amylum comprises W-Gum or potato starch.
6. according to any one described wilkinite ether of cellulose iron ore pellet additive of claim 1-3, it is characterized in that: described iron powder is pulverized the resultant powder in back with iron ore and is replaced; Or pulverize the resulting powder in back with iron ore at the remaining mine tailing of ore dressing process or tailings and replace.
7. method for preparing any one said wilkinite ether of cellulose iron ore pellet additive of claim 1-3 comprises:
(1) ether of cellulose and iron powder are joined in the kibbler, pulverize, obtain component 1;
(2) starch ethers and sodium bentonite are joined in the kibbler pulverize, obtain component 2;
(3) it is broken component 1 to be joined component 2 relaying continued powders, promptly gets.
8. according to the described method of claim 7, it is characterized in that: the pulverizing time described in the step (1) is 30-60 minute, is preferably 40 minutes; The pulverizing time described in the step (2) is 10-30 minute, is preferably 20 minutes; The pulverizing time described in the step (3) is 5-20 minute, is preferably 10 minutes.
9. the application of any one described wilkinite ether of cellulose iron ore pellet additive of claim 1-3 in producing iron ore pellets.
10. according to the described application of claim 9, it is characterized in that, comprising: said wilkinite ether of cellulose iron ore pellet additive is added in the fine iron breeze, make ball after the homogenizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN104342552A (en) * | 2014-11-28 | 2015-02-11 | 任瑞刚 | Composite adhesive for metallurgical pellet and production method thereof |
| CN105483370A (en) * | 2015-11-30 | 2016-04-13 | 滦县永恒粘合剂有限公司 | Drying-free bonding agent for iron powder cold pressing pellets |
| CN113293284A (en) * | 2021-05-28 | 2021-08-24 | 中南大学 | Organic binder and application thereof in preparation of pellet ore, organic-inorganic composite binder and application thereof |
| CN115279928A (en) * | 2020-05-18 | 2022-11-01 | 日本制铁株式会社 | Method for producing agglomerate and agglomerate |
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| CN104342552A (en) * | 2014-11-28 | 2015-02-11 | 任瑞刚 | Composite adhesive for metallurgical pellet and production method thereof |
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| CN115279928A (en) * | 2020-05-18 | 2022-11-01 | 日本制铁株式会社 | Method for producing agglomerate and agglomerate |
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| CN113293284A (en) * | 2021-05-28 | 2021-08-24 | 中南大学 | Organic binder and application thereof in preparation of pellet ore, organic-inorganic composite binder and application thereof |
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