CN101469366A - Iron ore pellet additive and preparation thereof - Google Patents
Iron ore pellet additive and preparation thereof Download PDFInfo
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- CN101469366A CN101469366A CNA200710305694XA CN200710305694A CN101469366A CN 101469366 A CN101469366 A CN 101469366A CN A200710305694X A CNA200710305694X A CN A200710305694XA CN 200710305694 A CN200710305694 A CN 200710305694A CN 101469366 A CN101469366 A CN 101469366A
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- iron ore
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- ore pellet
- pellet additive
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Abstract
The invention discloses an iron ore pellet additive and a preparation method thereof. The iron ore pellet additive consists of constituents by the following weight portion: 90 to 110 portions of bentonite, 3 to 5 portions of industrial alkali, and 1 to 4 portions of cellulose ether or ultramicro building material high-efficiency additives; and the constituents are mixed together, added with water to form paste or porridge, stirred evenly, placed for 3 to 6 days, dried, and crushed into particles with 1200-1500 meshes to obtain the iron ore pellet additive. An iron ore pellet obtained by wrapping the iron ore pellet additive has reduced burst, can reach more than 3000N, does not produce cracks after falling for 10 times, and greatly reduces silicon content; a furnace casting experiment proves that the iron ore pellet can not explode when entering a furnace at a temperature of 1200 DEG C, and can remarkably improve the tapping rate; compared with the prior additive which is simply the bentonite, the additive has the characteristics of strong adhesion force, high pelletization degree, short roasting time, good roasting performance, improved grade of pellet ore, energy consumption reduction, and so on.
Description
Technical field
This aspect relates to a kind of metallurgical material, relates in particular to a kind of high temperature oxidation iron ore pellets ore deposit additive of smelting iron usefulness and preparation method thereof, belongs to field of metallurgy.
Background technology
The agglomerates of sintered pellets binding agent is a key auxiliary material of producing steel industry processing pellet, and the good and bad direct relation of its performance the quality quality of pelletizing.The sintering plant pellet formation all is that binding agent is made ball with the wilkinite both at home and abroad for a long time, wilkinite is the binding agent a kind of commonly used in traditional pellet additive, wilkinite can improve the dropping strength and the ultimate compression strength of green-ball, in addition, and the burst temperature in the time of can also improving the green-ball drying.Bentonitic main component is SiO
2And AL
2O
3Whenever with addition of 1% wilkinite, the ferrous grade of pellet can descend 0.6%, China's pellet with addition of bentonitic percentage composition on average about 3-5%, mostly exist green-ball Pulverization ratio height, rate of drying is slow, intensity is low, rate of return mine height, reduces phenomenon such as grade, thereby have a strong impact on the energy consumption and the output of blast furnace ironmaking.
Summary of the invention
The present invention's technical problem at first to be solved is to overcome the deficiencies in the prior art, and a kind of new iron ore pellet additive is provided.
The present invention's technical problem at first to be solved is achieved through the following technical solutions:
A kind of iron ore pellet additive, mainly form by each component of following weight part:
Wilkinite 90-110 part, industrial soda 3-5 part, ether of cellulose or ultra micro building materials efficient additive 1-4 part;
Preferably, the weight part of each component is:
100 parts of wilkinites, 4 parts of industrial soda, 3 parts of ether of cellulose or ultra micro building materials efficient additives;
Wherein, described ultra micro building materials efficient additive be preferably for the patent No. be ZL200310113325.2 (Granted publication number: CN1268574C) disclosed ultra micro building materials efficient additive; Described ether of cellulose can be bought from common market and obtain.
Described industrial soda can be industrial monohydrate or industrial sodium hydroxide;
Another technical problem to be solved by this invention provides a kind of method for preparing above-mentioned iron ore pellet additive.
Another technical problem to be solved by this invention is achieved through the following technical solutions:
A kind of method for preparing above-mentioned iron ore pellet additive comprises:
(1) take by weighing each component by following weight part:
Wilkinite 90-110 part, industrial soda 3-5 part and ultra micro building materials efficient additive 1-4 part;
(2) said components is mixed after, add entry and (as long as satisfy mixture is become pasty state or congee shape as for the amount that adds entry, more or a little lessly all can, all do not influence enforcement of the present invention), stir, placed seasoning 3-6 days, be ground into 1200-1500 purpose particle, promptly.
The application method of iron ore pellet additive of the present invention: be used for the rotary kiln pelletizing, adopt 2-3kg iron ore pellet additive of the present invention can wrap up 1 ton of iron charge; Be used for the shaft furnace pelletizing, adopt 4kg iron ore pellet additive of the present invention can wrap up 1 ton of iron charge; The part by weight of the smart powder of iron ore pellet additive of the present invention and iron according to 2-4:1000 mixed, after stirring, add a certain amount of moisture, adopt disk or drum pelletizer to cause green-ball.Adopt conventional rotary kiln pelletizing method or shaft furnace pelletizing method to carry out preheating, calcining and cooling the green-ball of making, get the finished ball nodulizing.
Bentonitic order number is an order more than 200, and the order number of ultra micro building materials efficient additive is an order more than 80, because the order number is excessive, has the problem that is difficult for homogenizing, can't reach the purpose of wrapping up material with 4 kilograms wilkinite; Wilkinite belongs in inorganic materials and coheres the very strong material of function, meet water high viscosity is arranged, iron powder per ton need add the wilkinite of 35-45 kilogram just can make pelletizing, but the silicon content of wilkinite self is too high, directly having influenced the quality of steel, to the later stage trouble of having smelted iron silicon ribbon, is to reduce silicon content, must reduce bentonitic consumption, be converted into sodium bentonite by calcium-base bentonite.For this reason, the present invention has at first improved bentonitic gluing performance: wilkinite is handled through sodium, volume with water diffusion ether of cellulose and ultra micro building materials efficient additive, scleroma is ground into 1200-1500 purpose super-fine powder through supper micron mill (high pressure draft Ultra-micro-grinding machine) after dry, do not need homogenizing just can go into operation with original equipment, resulting like this micro mist agent particle size reduction, ultra micro is fluffy, surface-area increases, volumetric expansion, the parcel ability strengthens greatly, stick and degree, water-absorbent and perforate improve greatly, has the outstanding effect of cohering, the product of the present invention of 3-4 kilogram just can wrap up one ton iron powder, has so also reduced the molten amount of silicon greatly, has improved the quality of iron, for the production of high-quality steel is laid a good foundation, also significantly reduced production cost simultaneously.
Experiment confirm, wrap up the iron ore pellets that obtains with iron ore pellet additive of the present invention, the explosion of ball reduces, iron ore pellets can reach 3000 above newton, drop does not produce slight crack 10 times, silicon content descends greatly, throwing the stove test confirms, going into stove in the time of 1200 ℃ can not blow, and can significantly improve the speed of tapping a blast furnace, have that cohesive force is strong, pelletizing degree height, shorten roasting time with traditional comparing as additive with wilkinite merely, characteristics such as the roasting performance is good, pellet grade improves, cut down the consumption of energy.
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 or replace without departing from the spirit and scope of the present invention, but these modifications and replacing all fall within the scope of protection of the present invention the details of technical solution of the present invention and form.
The preparation of embodiment 1 iron ore pellet additive
(1) takes by weighing each component (unit: Kg): wilkinite 90, industrial monohydrate 3, ultra micro building materials efficient additive (according to Granted publication number: the disclosed method of CN 1268574C prepares ultra micro building materials efficient additive) 1 by following weight;
(2) said components is mixed after, add entry with mixture furnishing pasty state or congee shape, stir, placed 3-6 days, drying, (Qingdao Mai Kelong powder technology equipment company produces with the high pressure draft pulverizer, its model is MQL) be ground into 1200-1500 purpose particle, promptly.
The preparation of embodiment 2 iron ore pellet additives
(1) takes by weighing each component (unit: Kg): wilkinite 110, industrial sodium hydroxide 5 and ultra micro building materials efficient additive (according to Granted publication number: the disclosed method of CN 1268574C prepares ultra micro building materials efficient additive) 4 by following weight;
(2) said components is mixed after, add entry with mixture furnishing pasty state or congee shape, stir, placed 3-6 days, drying, (Qingdao Mai Kelong powder technology equipment company produces with the high pressure draft pulverizer, its model is MQL) be ground into 1200-1500 purpose particle, promptly.
The preparation of embodiment 3 iron ore pellet additives
(1) takes by weighing each component (unit: Kg): wilkinite 100, industrial sodium hydroxide 4, ether of cellulose 3 by following weight;
(2) said components is mixed after, add entry with mixture furnishing pasty state or congee shape, stir, placed 3-6 days, drying, (Qingdao Mai Kelong powder technology equipment company produces with the high pressure draft pulverizer, its model is MQL) be ground into 1200-1500 purpose particle, promptly.
The application performance test of test example 1 iron ore pellet additive of the present invention
The iron ore pellet additive that given the test agent: embodiment of the invention 1-3 is prepared is numbered given the test agent 1, given the test agent 2 and given the test agent 3 respectively.
Test method: the part by weight of the smart powder of given the test agent 1, given the test agent 2 and given the test agent 3 and iron according to 4:1000 mixed, after stirring, add a certain amount of moisture, adopt disk or drum pelletizer to cause green-ball; Adopt conventional rotary kiln pelletizing method or shaft furnace pelletizing method to carry out drying, preheating, calcining and cooling the green-ball of making, get the finished ball nodulizing.
Measure ultimate compression strength, dropping strength and the burst temperature of green-ball respectively according to ordinary method; Measure indexs such as the ultimate compression strength of finished ball nodulizing, wear-resistant index, concrete outcome sees Table 1.
The table 1 prepared green-ball of additive of the present invention and the performance index of finished ball nodulizing
As can be seen from the test results, can wrap up the smart powder of iron of 1000kg fully with the iron ore pellet additive of the present invention of 4kg, every performance of preparation-obtained green-ball and finished ball nodulizing all meets the requirements.
Claims (5)
1, a kind of iron ore pellet additive mainly is made up of each component of following weight part: wilkinite 90-110 part, industrial soda 3-5 part, ether of cellulose or ultra micro building materials efficient additive 1-4 part.
According to the iron ore pellet additive of claim 1, it is characterized in that 2, the weight part of each component is: 100 parts of wilkinites, 4 parts of industrial soda, 3 parts of ether of cellulose or ultra micro building materials efficient additives.
3, according to the iron ore pellet additive of claim 1 or 2, it is characterized in that: described industrial soda is industrial monohydrate or industrial sodium hydroxide.
4, a kind of method for preparing any one described iron ore pellet additive of claim 1-3 comprises:
(1) takes by weighing each component by described weight part;
(2) each component is mixed after, add entry and become pasty state or congee shape, stir, placed 3-6 days, drying is ground into 1200-1500 purpose particle, promptly.
5, any one described iron ore pellet additive application in blast furnace ironmaking of claim 1-3, comprise: the part by weight of the smart powder of described iron ore pellet additive and iron according to 2-4:1000 mixed, after stirring, add moisture, adopt disk or drum pelletizer to cause green-ball; The green-ball of making is adopted conventional rotary kiln pelletizing method or the preheating of shaft furnace pelletizing method, calcining and cooling, get the finished ball nodulizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710305694XA CN101469366A (en) | 2007-12-28 | 2007-12-28 | Iron ore pellet additive and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710305694XA CN101469366A (en) | 2007-12-28 | 2007-12-28 | Iron ore pellet additive and preparation thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101469366A true CN101469366A (en) | 2009-07-01 |
Family
ID=40827170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710305694XA Pending CN101469366A (en) | 2007-12-28 | 2007-12-28 | Iron ore pellet additive and preparation thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985690A (en) * | 2010-11-10 | 2011-03-16 | 攀枝花钢城集团米易瑞地矿业有限公司 | Pellet binding agent and preparation method thereof |
| CN104805279A (en) * | 2015-05-27 | 2015-07-29 | 李建文 | Magnesium-containing compounded additive and preparation method thereof |
| CN109929995A (en) * | 2019-03-29 | 2019-06-25 | 信阳市上天梯怡和矿产资源开发有限公司 | A kind of aluminium ash pellet binder and preparation method thereof |
-
2007
- 2007-12-28 CN CNA200710305694XA patent/CN101469366A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985690A (en) * | 2010-11-10 | 2011-03-16 | 攀枝花钢城集团米易瑞地矿业有限公司 | Pellet binding agent and preparation method thereof |
| CN104805279A (en) * | 2015-05-27 | 2015-07-29 | 李建文 | Magnesium-containing compounded additive and preparation method thereof |
| CN109929995A (en) * | 2019-03-29 | 2019-06-25 | 信阳市上天梯怡和矿产资源开发有限公司 | A kind of aluminium ash pellet binder and preparation method thereof |
| CN109929995B (en) * | 2019-03-29 | 2020-08-07 | 信阳市上天梯怡和矿产资源开发有限公司 | Aluminum ash pellet binder and preparation method thereof |
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Effective date of abandoning: 20090701 |
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