CN1523123A - Superlow temperature sinter and mineralization energy-saving additive - Google Patents
Superlow temperature sinter and mineralization energy-saving additive Download PDFInfo
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- CN1523123A CN1523123A CNA2003101244611A CN200310124461A CN1523123A CN 1523123 A CN1523123 A CN 1523123A CN A2003101244611 A CNA2003101244611 A CN A2003101244611A CN 200310124461 A CN200310124461 A CN 200310124461A CN 1523123 A CN1523123 A CN 1523123A
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- additive
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- low temperature
- sintering
- mineralizer
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Abstract
The present invention discloses an ultra-low temperature sintering mineralization energy-saving additive. It contains (wt%) 10-60% of ultra-low temp. mineralizer, 10-30% of oxygenation agent, 10-40% of melting agent, 10-40% of catalyst and 0-30% of pore-forming agent. Said invention is a powder agent made up by mixing all the above-mentioned materials. Said invented additive has the actions of catalytic improving combustion, inhibiting 2CaO2 and SiO2 undesirable transformation in the sintering process, promoting main binding phase SFCA formation of sintering ore, inhibiting low-temperature reduction pulverization action and raising catalytic sintering process, etc.
Description
Technical field
The present invention relates to the additive that a kind of metallurgy sintered pelletizing is used, be mainly used in the metallurgical performance that improves agglomerate and energy-saving and cost-reducing.
Background technology
As everyone knows, the main purpose that agglomerates of sintered pellets is produced, the pulverulent material that will contain iron powder exactly sinters piece into, and the enriched ore with metallurgical performance that certain particle size is formed and good is provided for blast-furnace smelting.But in secular sintering production process, produce high temperature after always solid fuel ignition is allocated in dependence in a large number into, breeze, flux and other pulverulent material fusing back are produced a large amount of liquid phases, in process of cooling, pulverulent material is bonded to piece by these liquid phases.Along with Developments in Sintering Ttheory, progressively propose and applied low temperature sintering technology, negated to produce a large amount of liquid phases with bond caked method of breeze by high temperature merely.Low-temperature sintering is exactly by reducing the proportioning of carbon, make sintering process under lower temperature conditions, form a large amount of compound calcium ferrites of needle-like (SFCA),, can improving the various performances of agglomerate and reduce power consumption as main bonding phase with this.Majority is only paid attention to the pellet forming process process in the present existing technology, makes the ball quality by improvement, improves the sintering process ventilation property and reaches energy-conservation purpose.But often ignored whole sintering whole process, particularly sintering temperature has been difficult to control.Therefore, must study a kind of additive of can control realizing that low sintering normal condition can strengthen the useful composition of sintering process again and satisfy the ironmaking requirement of raising day by day.
Summary of the invention
The object of the present invention is to provide a kind of sintered at ultra low temperature mineralising additive for saving energy, utilize this additive can reduce the compound melt temperature, improve raw material self-characteristic, sintering velocity, mineralization degree improves finished product mineral amount with this, reduces coal-fired consumption.
For achieving the above object, sintered at ultra low temperature mineralising additive for saving energy provided by the present invention comprises mixtures such as being selected from very low temperature mineralizer, oxygenation agent, fusing agent, catalyzer, pore former mixing according to a conventional method.This active principle and content are:
Very low temperature mineralizer 10-60%;
Oxygenation agent 10-30%;
Fusing agent 10-40%;
Catalyzer 10-40%;
Pore former 0-30%;
All percentage ratios are weight percentage.
This components contents preferable range:
Very low temperature mineralizer 30-60%;
Oxygenation agent 10-30%;
Fusing agent 10-30%;
Catalyzer 10-30%;
Pore former 10-30%;
All percentage ratios are weight percentage.
The content optimum range of said composition:
Very low temperature mineralizer 40%;
Oxygenation agent 20%;
Fusing agent 20%;
Catalyzer 20%
Pore former 5%;
All percentage ratios are weight percentage.
Described additive of the present invention is less than the powder formulation below the 1mm.
Described very low temperature mineralizer is selected from borax, the boracic class material of boric acid.Be preferably borax, boric acid, its advantage shows that resource is wide, price is low.
The effect of very low temperature mineralizer is to promote solid state reaction, reduces liquid phase viscosity, the crystalline substance that destroys silicon-dioxide around, promote itself and the chemosynthesis of calcium oxide, avoid the generation of free calcium oxide, quicken the generation of grog, the mineralising granularity in raising finished product ore deposit.
Described oxygenation agent is selected from saltpetre, SODIUMNITRATE, nitrocalcite, Sodium Nitrite, sodium perchlorate, potassium permanganate class.Be preferably SODIUMNITRATE, consider oxygen decomposition amount in the heat-processed, the height of price, security in the use and stability etc. are all multifactor.
The effect of oxygenation agent is to heat up in the compound to reach to begin to decompose behind the certain value to discharge oxygen, regulates the combustion conditions of compound thus, promotes combustionvelocity and " grilling thoroughly " effect of pellet, avoids chemical incomplete combustion.
Described fusing agent is selected from fluorite class low melting point, as fluorite or cuspidite.Preferred size is less than the 0.25mm fluorspar powder.
The effect of fusing agent is to reduce mixed liquor and generates temperature mutually.
Described catalyzer is selected from basic metal class material, as a kind of of KCl, NaCl or its mixture.
The effect of catalyzer is the combustion processes by the catalysis of basic metal class material, vaporized carbon.
Described pore former is an expanding material, is selected from a kind of or its mixture of polyvinyl chloride organic materials, vermiculite, perlite.Be preferably polyvinyl chloride organic materials or perlite.
This additive is ground into it＜the following powder of 1mm, and stir by its mixed and to mix in 3 minutes, promptly obtain finished product and carry out packing and get final product.
The consumption of this additive is ten thousand/3-7 of finished product sintering or pellet consumption.
Positively effect of the present invention is: the one, and this sintered at ultra low temperature mineralising additive for saving energy injects water, is sprayed in the compound uniform distribution in raw material after stirring.In sintering process, temperature raises gradually, and oxygenant progressively decomposes, and forms relative: " oxygen-rich area ", and catalyzer also begins to work simultaneously, thereby has promoted the combustionvelocity and the saturating effect of combustion of pellet, and has reduced the requirement to coal-fired grade; Again because the effect of very low temperature mineralizer and fusing agent makes that free calcium oxide content greatly reduces in sintering or the pellet and since the effect of pore former through burn behind the high temperature or pellet in form hole, thereby improved the quality of sintering or pellet effectively.Two these additives be based on basic metal catalyzer, based on the oxygenation agent of nitrate, help the multiple inorganic substance that sinter strength improves based on the mineralizer that contains boron substance and other and form.The each component proportioning has been taken all factors into consideration the influence to whole sintering process, has catalytic combustion-supporting, suppresses sintering process 2CaO
2, SiO
#-[2], bad crystal conversion, a SFCA forms and the effect of inhibition low temperature reduction degradation to have promoted mainly to bond agglomerate, the process of fortifying catalytic sintering process.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
Embodiment 1
Choose raw material by weight percentage:
The very low temperature additive is selected borax 40% for use;
SODIUMNITRATE 20% is selected in the oxygenation agent for use;
Fluorspar powder 20% is selected in the fusing agent for use; Granularity＜the 0.25mm of fluorspar powder wherein;
Catalyzer is selected NaCl 18% for use
Pore former is selected vermiculite 2% for use.
Its method: above-mentioned raw materials is crushed to＜below the 1mm, be mixed in proportion stirring and be the additive finished product in 3 minutes, packing gets final product.
Embodiment 2
Choose raw material by weight percentage
The very low temperature additive is selected boric acid 30% for use;
Sodium perchlorate 20% is selected in the oxygenation agent for use;
Fluorite 18% is selected in the fusing agent for use;
Catalyzer is selected KCl 18% for use;
Pore former is selected polyvinyl chloride 14% for use.
Its method is identical with embodiment 1.
Embodiment 3
Choose raw material by weight percentage:
The very low temperature additive is selected borax 40% for use;
Potassium permanganate 10% is selected in the oxygenation agent for use;
Fluorite 25% is selected in the fusing agent for use;
Catalyzer is selected KCl, NaCl 15% for use
Pore former is selected vermiculite, perlite 10% for use.
Its method is identical with embodiment 1.
The embodiment of the invention 1 additive mixed with water to allocate into fully to stir in the sinter mixture after stirring by a certain percentage again carry out sintering cup test, test-results can be found out by subordinate list.
| Experimental group | Additive (pressing the agglomerate consumption) % | Fuel ratio % | Vertical sintering speed mm/min | Tumbler index % | Utilization coefficient t/m 2·h | ?FeO ??％ |
| ??0 | ????0 | ????6 | ??21.2 | ??56 | ????1.48 | ??9.4 |
| ??1 | ????3 | ????5.89 | ??22.84 | ??56.2 | ????1.5 | ??8.5 |
| ??2 | ????4 | ????5.3 | ??26.28 | ??57.27 | ????1.67 | ??8.2 |
| ??3 | ????5 | ????5.22 | ??28.19 | ??57.47 | ????1.69 | ??7.6 |
| ??4 | ????7 | ????5.12 | ??27.00 | ??57.2 | ????1.70 | ??6.7 |
Annotate: the experiment group number be 0 be not doping test-results.
By experimental result as can be seen: use additive of the present invention can reduce fuel consumption, improve vertical sintering speed, sand burning intensity improves, improves SINTERING PRODUCTION efficient, reduced sintering mine FeO, comprehensive optimization of above index has improved the metallurgical performance of stove agglomerate, reduces the SINTERING PRODUCTION cost.
In addition, the embodiment of the invention 2 or 3 additive can adopt with quadrat method and carry out use-testing.
Claims (9)
1, sintered at ultra low temperature mineralising additive for saving energy is characterized in that containing component and content (weight percent) and is the very low temperature mineralizer of 10-60%, the oxygenation agent of 10-30%, the fusing agent of 10-40%, the catalyzer of 10-40%, the pore former of 0-30%; Mix according to a conventional method.
2, by the described additive of claim 1, it is characterized in that containing component and content (weight percent) and be the very low temperature mineralizer of 30-60%, the oxygenation agent of 10-30%, the fusing agent of 10-30%, the catalyzer of 10-30%, the pore former of 10-30%.
3,, it is characterized in that containing component and content (weight percent) and be 40% very low temperature mineralizer, 20% oxygenation agent, 20% fusing agent, 20% catalyzer, 5% pore former by the described additive of claim 1.
4, additive according to claim 1 is characterized in that described additive is less than the powder formulation below the 1mm.
5, by the described additive of claim 1, it is characterized in that described very low temperature mineralizer be selected from borax or boric acid a kind of or its mixture.
6, by the described additive of claim 1, it is characterized in that described oxygenation agent is a kind of or its mixture that is selected from saltpetre, SODIUMNITRATE, nitrocalcite, Sodium Nitrite, sodium perchlorate, potassium permanganate.
7, by the described additive of claim 1, it is characterized in that described fusing agent is selected from fluorite.
8, by the described additive of claim 1, it is characterized in that described catalyzer is to be selected from a kind of of KCl, NaCl or its mixture.
9, by the described additive of claim 1, it is characterized in that described pore former is a kind of or its mixture that is selected from polyvinyl chloride, vermiculite, perlite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310124461 CN1288257C (en) | 2003-08-12 | 2003-12-15 | Superlow temperature sinter and mineralization energy-saving additive |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03152729.9 | 2003-08-12 | ||
| CN03152729 | 2003-08-12 | ||
| CN 200310124461 CN1288257C (en) | 2003-08-12 | 2003-12-15 | Superlow temperature sinter and mineralization energy-saving additive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1523123A true CN1523123A (en) | 2004-08-25 |
| CN1288257C CN1288257C (en) | 2006-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310124461 Expired - Fee Related CN1288257C (en) | 2003-08-12 | 2003-12-15 | Superlow temperature sinter and mineralization energy-saving additive |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408703C (en) * | 2006-09-08 | 2008-08-06 | 娄底市裕德科技有限公司 | Sintering ore additive |
| CN102906285A (en) * | 2010-04-27 | 2013-01-30 | 吴美惠 | Additive composition for metal sintering |
| CN106319205A (en) * | 2016-08-02 | 2017-01-11 | 华北理工大学 | Novel additive for improving tumbler strength of vanadium-titanium magnet sintered ore |
| CN110512073A (en) * | 2019-09-27 | 2019-11-29 | 西安建筑科技大学 | A kind of additive and high reducibility sinter and preparation method thereof improving sinter reproducibility |
| CN110835677A (en) * | 2019-10-30 | 2020-02-25 | 德龙钢铁有限公司 | Method for improving sintered ore phase structure |
| CN115323166A (en) * | 2022-07-29 | 2022-11-11 | 安徽工业大学 | Sintering method using double-layer pellets |
-
2003
- 2003-12-15 CN CN 200310124461 patent/CN1288257C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408703C (en) * | 2006-09-08 | 2008-08-06 | 娄底市裕德科技有限公司 | Sintering ore additive |
| CN102906285A (en) * | 2010-04-27 | 2013-01-30 | 吴美惠 | Additive composition for metal sintering |
| CN106319205A (en) * | 2016-08-02 | 2017-01-11 | 华北理工大学 | Novel additive for improving tumbler strength of vanadium-titanium magnet sintered ore |
| CN110512073A (en) * | 2019-09-27 | 2019-11-29 | 西安建筑科技大学 | A kind of additive and high reducibility sinter and preparation method thereof improving sinter reproducibility |
| CN110835677A (en) * | 2019-10-30 | 2020-02-25 | 德龙钢铁有限公司 | Method for improving sintered ore phase structure |
| CN115323166A (en) * | 2022-07-29 | 2022-11-11 | 安徽工业大学 | Sintering method using double-layer pellets |
| CN115323166B (en) * | 2022-07-29 | 2023-12-29 | 安徽工业大学 | Sintering method using double-layer pellets |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1288257C (en) | 2006-12-06 |
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