CN101008046A - Cementing agent for producing pellet ore and preparing process thereof - Google Patents
Cementing agent for producing pellet ore and preparing process thereof Download PDFInfo
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- CN101008046A CN101008046A CN 200610001783 CN200610001783A CN101008046A CN 101008046 A CN101008046 A CN 101008046A CN 200610001783 CN200610001783 CN 200610001783 CN 200610001783 A CN200610001783 A CN 200610001783A CN 101008046 A CN101008046 A CN 101008046A
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Abstract
The invention discloses a new bonding agent for producing pellet ore and the method for preparing said bonding agent, belonging to metallurgy field. The comprised bonding agent and their proportion by weight are as follows: water soluble organic matter 1- 50, clay 10- 30, borax 1- 2, active calcium 10- 40, active carbon 10- 25, and magnesium lime cement 8- 15; said water soluble is selected from one of starch ether, cellulose ether or polyvinyl alcohol or mixture of them at any ratio. The bonding agent is added into process producing pellet ore, and the physical property and metallurgy performance are dramatically increased, and it is characterized by saving production cost and reducing environmental pollution.
Description
Technical field
The present invention relates to a kind of binding agent, relate in particular to a kind of binding agent of producing pellet and preparation method thereof that is used to, belong to field of metallurgy.
Background technology
Pellet is as good blast furnace burden, have of high grade, intensity good, even-grained advantage, the people in the industry calls it by the fine-sounding name of " gripe water " into blast furnace.Acidic pellet ore and high basicity sinter collocation can constitute rational blast furnace burden structure, and it is burnt to make blast furnace ironmaking reach the volume increase joint, the purpose of increasing economic efficiency.
Binding agent is that fine iron breeze is made the indispensable important component of pelletizing, requires it to have good cohesiveness and balling-up, and 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.
Up to now, used binding agent has mineral binder bonds such as water glass, slaked lime, cement, clay, wilkinite, diatomite alkali metal compound and salt; Organic binder bonds such as humic acids, xylonic acid, carboxymethyl cellulose, KLP, Aleotac, peridur; And be the organic/inorganic complex adhesive of main component with the wilkinite.
It is binding agent that present domestic pellet formation corporate boss will adopt wilkinite, and addition but contains higher silicon-dioxide and aluminium sesquioxide in the wilkinite about 1.5%～4%, and these compositions have reduced pellet grade, and are unfavorable to blast furnace ironmaking.In order to address this problem, organic binder bonds such as humic acids, xylonic acid, carboxymethyl cellulose, KLP, Aleotac, peridur have been adopted again, this class binding agent has good cohesiveness and balling-up, when high temperature, can burn and remove, therefore the impurity of bringing pelletizing into is few, the pelletizing grade is higher, and finished ball has reducing property preferably.But also there are defectives such as price height, the physicals of finished ball and metallurgical performance can not satisfy that blast furnace technology requires fully simultaneously, thereby fail to apply industrial.At above-mentioned situation, developed again in recent years is the organic/inorganic complex adhesive of main component with the wilkinite, the relative consumption of this binding agent is less (according to the difference of pellet formation technology and iron ore concentrate moral character, addition is about 1.5%～5%), this has improved the quality of pellet to a certain extent, but still can not still have some problems such as anti-knocking property are poor, intensity is low in the use from dealing with problems in essence, want further to improve pellet grade and also have significant limitation.
Summary of the invention
The present invention's technical problem at first to be solved is to overcome the deficiencies in the prior art, a kind of new binding agent is provided, this binding agent can be all or part of alternative existing binding agent, use the prepared pellet of binding agent, its physicals and metallurgical performance all increase.
Technical problem to be solved by this invention realizes by following technological approaches:
A kind of binding agent that is used to produce pellet, form by the raw material of following weight part:
1～50 part of water soluble organic substance, 10～30 parts of clays, 1～2 part of borax, 10～40 parts of Calcium of intensifiens, 10～25 parts of gacs, 8～15 parts of magnesite cement; Preferably, the weight part of each raw material is: 23.5 parts of water soluble organic substances, 20 parts of clays, 1.5 parts of boraxs, 25 parts of Calcium of intensifiens, 18 parts of gacs, 12 parts of magnesite cement.
Wherein, described water soluble organic substance is selected from any or their more than one mixtures formed with arbitrary proportion among starch ethers, cellulose ethers or the polyvinyl alcohol three.Described starch ethers is preferably: hydroxyethylamyle, hydroxypropylated starch, allyl starch or sodium starch glycolate; Described cellulose ethers is preferably alkyl cellulose ether (as methyl cellulose ether, cellulose ether); Carboxyl alkyl cellulose ether (as TYLOSE 30000, carboxylic propyl methocel ether); Hydroxyalkyl cellulose ether (as hydroxypropylcelluloether ether, hydroxyethyl ether cellulose, hydroxyethylmethyl-cellulose ether) etc.
Described Calcium of intensifiens is preferably light calcium carbonate, oyster shell whiting any or the two mixture of being formed with arbitrary proportion in the two.
Described clay is preferably kaolin or attapulgite any or the two mixture of being formed with arbitrary proportion in the two.
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 binding agent.
Another technical problem to be solved by this invention realizes by following technological approaches:
A kind of preparation method who is used to produce the binding agent of pellet, step is as follows:
1) takes by weighing each raw material by following weight part: 1～50 part of water soluble organic substance, 10～30 parts of clays, 1～2 part of borax, 10～40 parts of Calcium of intensifiens, 10～25 parts of gacs, 8～15 parts of magnesite cement; Wherein, described water soluble organic substance is selected from any or their more than one mixtures formed with arbitrary proportion among starch ethers, cellulose ethers or the polyvinyl alcohol three;
2) above-mentioned each component is pulverized the back and cross 200 orders～2000 mesh sieves, the particle after sieving is mixed, promptly get binding agent of the present invention.
The using method of binding agent of the present invention: with binding agent of the present invention in proportion (this ratio can be grasped according to practical situation flexibly by those skilled in the art) add in the fine iron breeze, fully just can be directly used in pelletizer after the homogenizing and make ball.
Binding agent of the present invention is that science is selected each component, makes up the function of various compositions according to the pellet formation processing requirement and to every index request of green-ball, finished ball, a kind of novel binders that rational proportion forms, and the beneficial effect with following several respects:
1, solved existing viscosity in the existing binding agent and significantly improved the difficult problem that back pelletizing green-ball burst rate also significantly increases, cohesiveness and in warm performance be better than traditional matrix material.
2, solved the difficult problem that organic class of the prior art, half organic class binding agent generally reduce the finished product pellet strength, binding agent of the present invention uses the back that finished ball nodulizing intensity is had the raising effect.
3, beneficiating ingredients such as magnesium oxide, calcium oxide, organic binder bond are more in the binding agent of the present invention, and foreign matter contents such as silicon-dioxide, aluminium sesquioxide seldom.
4, binding agent adhesive property excellence of the present invention both can be used separately, and ratio that can also 1: 5 replaces wilkinite to use, and the ultimate compression strength of green-ball and finished pellet is increased.
When 5, using binding agent of the present invention,, therefore can increase substantially the pellet ferrous grade because impurity such as its addition and itself contained silicon-dioxide, aluminium sesquioxide are less.
When 6, using binding agent of the present invention, owing to itself contain more calcium oxide, and foreign matter contents such as silicon-dioxide, aluminium sesquioxide are less, thereby can reduce blast furnace flux consumption.
When 7, using binding agent of the present invention, the porosity of finished ball is higher, and the content of iron protoxide is low, has good reducing property, can improve about 25% under the same terms.
8, use binding agent of the present invention, can utilize difficult roasted ore (as Brazilian rhombohedral iron ore) to be used for shaft furnace and produce pelletizing, widen the iron ore concentrate raw material sources.
9, use binding agent of the present invention, it is burnt to make blast furnace reach the volume increase joint, reduces environmental pollution, the purpose of increasing economic efficiency.
Embodiment
Further describe the present invention by the following examples, it should be understood that these embodiment only are used for the purpose of illustration, never limit protection scope of the present invention.
The preparation of [embodiment 1] binding agent of the present invention
Take by weighing each raw material (unit: kg): hydroxyethylamyle 12, sodium starch glycolate 8, methyl cellulose ether 10, TYLOSE 30000 14, hydroxypropylcelluloether ether 6, kaolin 18, attapulgite 12, borax 2, light calcium carbonate 22, oyster shell whiting 18, gac 25, magnesite cement 15 by following weight part; Above-mentioned each component is pulverized the back cross 200 mesh sieves, with the particle homogeneous after sieving, stir, promptly get binding agent of the present invention.
The preparation of [embodiment 2] binding agent of the present invention
Take by weighing each raw material (unit: kg): polyvinyl alcohol 1, kaolin 10, borax 1, light calcium carbonate 10, gac 10, magnesite cement 8 by following weight part; Above-mentioned each component is pulverized the back cross 2000 mesh sieves, with the particle homogeneous after sieving, stir, promptly get binding agent of the present invention.
The preparation of [embodiment 3] binding agent of the present invention
Take by weighing each raw material (unit: kg): hydroxypropylated starch 10, cellulose ether 7, polyvinyl alcohol 6.5, kaolin 14, attapulgite 6, borax 1.5, light calcium carbonate 15, oyster shell whiting 10, gac 18, magnesite cement 12 by following weight part; Above-mentioned each component is pulverized the back cross 800 mesh sieves, with the particle homogeneous after sieving, stir, promptly get binding agent of the present invention.
The preparation of [embodiment 4] binding agent of the present invention
Take by weighing each raw material (unit: kg): allyl starch 5, kaolin 15, borax 1, oyster shell whiting 18, gac 12, magnesite cement 10 by following weight part; Above-mentioned each component is pulverized the back cross 2000 mesh sieves, with the particle homogeneous after sieving, stir, promptly get binding agent of the present invention.
The preparation of [embodiment 5] binding agent of the present invention
Take by weighing each raw material (unit: kg): hydroxypropylated starch 12, cellulose ether 16, hydroxyethyl ether cellulose 17, kaolin 25, borax 2, light calcium carbonate 35, gac 20, magnesite cement 14 by following weight part; Above-mentioned each component is pulverized the back cross 1500 mesh sieves, with the particle homogeneous after sieving, stir, promptly get binding agent of the present invention.
The preparation of [embodiment 6] binding agent of the present invention
By following weight part take by weighing each raw material (unit: kg):: hydroxyethylamyle 5, hydroxypropylated starch 6, allyl starch 4, sodium starch glycolate 3, methyl cellulose ether 7, cellulose ether 2, TYLOSE 30000 5, carboxylic propyl methocel ether 2, hydroxypropylcelluloether ether 6, hydroxyethyl ether cellulose 3, hydroxyethylmethyl-cellulose ether 2, polyvinyl alcohol 5, attapulgite 28, borax 1.8, light calcium carbonate 38, gac 24, magnesite cement 14; Above-mentioned each component is pulverized the back cross 800 mesh sieves, with the particle homogeneous after sieving, stir, promptly get binding agent of the present invention.
The preparation of [embodiment 7] binding agent of the present invention
Take by weighing each raw material (unit: kg): carboxylic propyl methocel ether 8, light calcium carbonate 6, oyster shell whiting 7, borax 1, kaolin 15, gac 16, magnesite cement 10 by following weight part; Above-mentioned each component is pulverized the back cross 1000 mesh sieves, with the particle homogeneous after sieving, stir, promptly get binding agent of the present invention.
The preparation of [embodiment 8] binding agent of the present invention
Take by weighing each raw material (unit: kg): polyvinyl alcohol 6, hydroxypropylated starch 7, carboxylic propyl methocel ether 3, kaolin 8, attapulgite 7, borax 1, light calcium carbonate 30, gac 15, magnesite cement 10 by following weight part; Above-mentioned each component is pulverized the back cross 400 mesh sieves, with the particle homogeneous after sieving, stir, promptly get binding agent of the present invention.
Test the effect test of routine binding agent of the present invention
One, test materials
Supply test agent: the embodiment of the invention 3 and 6 prepared binding agents.
Control sample: wilkinite and recombiner (purchasing) in Jinan iron and steel group
Two, test method:
All tests are carried out on pelletizing plant's pellet production line, test under two kinds of situations that have or not fine iron breeze damp mill profit mill respectively.
On 3 ,-May 11 (1) 2005 on May, under the situation of no damp mill profit mill, simultaneous test has been carried out in the influence of finished ball nodulizing with using original binding agent of pelletizing plant and part to add under the two kinds of different situations of binding agent that the present invention relates to separately.
On 12 ,-June 7 (2) 2005 on May, under the situation that damp mill profit mill is arranged, simultaneous test has been carried out in the influence of finished ball nodulizing with using original binding agent of pelletizing plant and part to add under the two kinds of different situations of binding agent that the present invention relates to separately.
Three, test-results
Test-results sees Table 1.
The results of industrial application test-results of table 1 binding agent of the present invention
| Date (2005) | The profit mill | Domestic smart powder (%) | Chile's smart powder (%) | Brassidin powder (%) | Binding agent of the present invention (%) | Wilkinite and recombiner (%) | The finished ball nodulizing | ||||
| TFe | SiO 2 | CaO | Ultimate compression strength | Tumbler index | |||||||
| 30-June 7 May on the-29th May 12-11 days on the 8th May-7 days on the 3rd May | Not having has | 50 50 65 65 | 25 25 5 5 | 25 25 30 30 | / 0.2 0.2 / | 5.0-5.3 3.8 2.6 3.6 | 62.75 63.79 63.72 63.04 | 5.90 4.84 4.95 5.8 | 1.24 1.22 1.14 1.2 | 2952 3057 3043 3043 | 91.10 92.45 92.40 92.17 |
As can be seen from the test results, do not have at fine iron breeze under the situation of damp mill profit mill, the binding agent of the present invention with addition of 0.2% is alternative 1.2% wilkinite approximately, improves pelletizing grade 1%, reduces pelletizing SiO
2Content 0.95%; With addition of binding agent of the present invention, approximately alternative 1% wilkinite improves pelletizing grade 0.68%, reduces pelletizing SiO under the situation that the profit mill is arranged
2Content 0.85%.In a word, no matter the profit mill is being arranged or is not having under the situation of profit mill, binding agent of the present invention with addition of 0.2%, pellet physical strength (ultimate compression strength and tumbler index) all is improved to a certain extent, use this high-grade pellet to be used for blast furnace ironmaking, pellet per ton can produce the economic benefit about 18 yuan at least.
Claims (8)
1. binding agent that is used to produce pellet, form by the raw material of following weight part:
1～50 part of water soluble organic substance, 10～30 parts of clays, 1～2 part of borax, 10～40 parts of Calcium of intensifiens, 10～25 parts of gacs, 8～15 parts of magnesite cement; Wherein, described water soluble organic substance is selected from any or their more than one mixtures formed with arbitrary proportion among starch ethers, cellulose ethers or the polyvinyl alcohol three.
2. according to the binding agent of claim 1, it is characterized in that the weight part of each component is: 23.5 parts of water soluble organic substances, 20 parts of clays, 1.5 parts of boraxs, 25 parts of Calcium of intensifiens, 18 parts of gacs, 12 parts of magnesite cement.
3. according to the binding agent of claim 1, it is characterized in that described starch ethers is selected from hydroxyethylamyle, hydroxypropylated starch, allyl starch or sodium starch glycolate; Described cellulose ethers is selected from alkyl cellulose ether, carboxyl alkyl cellulose ether or hydroxyalkyl cellulose ether.
4. according to the binding agent of claim 3, it is characterized in that described alkyl cellulose ether is methyl cellulose ether or cellulose ether; Described carboxyl alkyl cellulose ether is TYLOSE 30000 or carboxylic propyl methocel ether; Described hydroxyalkyl cellulose ether is selected from hydroxypropylcelluloether ether, hydroxyethyl ether cellulose or hydroxyethylmethyl-cellulose ether.
5. according to the binding agent of claim 1, it is characterized in that described Calcium of intensifiens is light calcium carbonate, oyster shell whiting any or the two mixture of being formed with arbitrary proportion in the two.
6. according to the binding agent of claim 1, it is characterized in that described clay is kaolin or attapulgite any or the two mixture of being formed with arbitrary proportion in the two.
7. the preparation method of the binding agent of claim 1, step is as follows:
Take by weighing each raw material by following weight part: 1～50 part of water soluble organic substance, 10～30 parts of clays, 1～2 part of borax, 10～40 parts of Calcium of intensifiens, 10～25 parts of gacs, 8～15 parts of magnesite cement; Wherein, described water soluble organic substance is selected from any or their more than one mixtures formed with arbitrary proportion among starch ethers, cellulose ethers or the polyvinyl alcohol three;
1) above-mentioned each component is pulverized the back and cross 200 orders～2000 mesh sieves, the particle after sieving is mixed, promptly get binding agent of the present invention.
8. any application of binding agent in metallurgy of claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100017830A CN100412211C (en) | 2006-01-25 | 2006-01-25 | Cementing agent for producing pellet ore and preparing process thereof |
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| CNB2006100017830A CN100412211C (en) | 2006-01-25 | 2006-01-25 | Cementing agent for producing pellet ore and preparing process thereof |
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| CN101008046A true CN101008046A (en) | 2007-08-01 |
| CN100412211C CN100412211C (en) | 2008-08-20 |
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