CN101463422A - Carbon decreasing synergistic agent for iron ore powder sintering - Google Patents
Carbon decreasing synergistic agent for iron ore powder sintering Download PDFInfo
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- CN101463422A CN101463422A CNA2009100766221A CN200910076622A CN101463422A CN 101463422 A CN101463422 A CN 101463422A CN A2009100766221 A CNA2009100766221 A CN A2009100766221A CN 200910076622 A CN200910076622 A CN 200910076622A CN 101463422 A CN101463422 A CN 101463422A
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- iron ore
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- synergist
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Abstract
The invention belongs to the iron ore sintering field and relates to an iron ore powder sintering carbon dropping synergist which is applied to the iron ore powder sintering production. The iron ore powder sintering carbon dropping synergist is characterized in that the synergist comprises the components by weight percent of 10-50% of sodium nitrate, 10-50% of boric acid, 5-25% of bentonite, 5-10% of sodium carbonate and 5-10% of fluorite. In the using method, the dried ingredients are finely ground to be 0.052mm, mixed uniformly and sealed into a bag. When in use, the bag is opened and the components are poured into a hopper of the carbon dropping synergist. The adding amount of the synergist is 0.01-0.04% of the dry weight of the mixture. Double-controle of a screw feeder and an electric vibrating feeder is adopted to accurately distribute the mixture on a main belt of the sintering mixture pro rata. The feeders are required to be arranged behind a carbon feeder to ensure that the carbon dropping synergist is uniformly bestrewed on coke powder, coal dust or coke and coal mixed powder. The synergist has the advantages of good environment protection effect, low using amount, less added cost and obvious using effect and can be applied to sintered ores of different types with different alkalinity.
Description
Technical field
The invention belongs to the iron ore sintering field, relate to a kind of carbon decreasing synergistic agent for iron ore powder sintering, be applicable to that iron ore powder sintering production reduces burnup, improves environmental protection, improves the effect of output and intensity.
Background technology
Reduce solid burnup, synergistic agent technology and the method for improving sinter quality have multiple, such as the Langfang City metallurgy additive company, four and the adglutinate synergism agent of units such as metallurgical material company limited of logical space group of chemical industry company limited, Henan and potent dose method of rising, their common ground of the method for this class metallurgy additive is all to adopt the principle of catalyticcombustion, do not consider the feature of environmental protection of material therefor, often use the material in band " Cl " source, for example magnesium chloride (MgCl
2), sodium-chlor (NaCl), sodium chlorate (NaClO
3), these inorganicss generate the most deleterious gas---Dioxins in the world today in sintering process under 300 ℃～400 ℃ temperature, and from 2006, west industrially developed country forbade dropping into " Cl " source in sintering and Electric furnace steel making production process.
Summary of the invention
The present invention is according to oxygenation catalyticcombustion and low sintering principle, by binding agent, the oxygenation agent, catalyzer, ignition dope, fusing assistant, the compound composition sintering of toughener carbon decreasing synergistic agent, in the sintered mix process, its even cloth is spread across on the solid fuel of sinter mixture, binding agent plays to help strengthening and granulates, improve the effect of mixture ventilation, oxygenation agent and ignition dope play the effect of catalytic combustion-supporting, join carbon for reduction condition is provided, fusing assistant plays the fusing point that reduces sintered material, increase the effect of sintered bond phase and reduction sintering temperature, toughener is under low sintering condition, effectively improve the intensity of sintering finished ores, total reaching reduces SINTERING PRODUCTION and joins carbon raising output and intensity, improves the purpose of sinter quality comprehensively.
A kind of carbon decreasing synergistic agent for iron ore powder sintering, its composition weight percent is: 10%～50% SODIUMNITRATE, 10%～50% boric acid, 5%～25% bentonite, 5%～10% yellow soda ash, 5%～10% fluorite, concrete composition should require to do suitably to adjust according to sinter basicity and mineral and carbon drop, volume increase, enhanced, optimizes proportion of composing and is: 40%NaNO
3+ 35%H
2BO
3+ 15% bentonite+5%NaCO
3+ 5% fluorite.
The carbon decreasing synergistic agent for iron ore powder sintering using method is: above dried ingredients is finely ground to 140 orders (0.052mm), uniform mixing, pocket is opened in the sealing pack during use, pour the carbon decreasing synergistic agent hopper into, the synergistic agent add-on is 0.4 ‰ of compound dry weight～0.1 ‰.Adopt screw feeder and the dual control of electric vibrating feeder on the main belt with addition of the accurate cloth of ratio to sintered mix, require feeding device to be installed in the back of joining the carbon feed, so as to guarantee carbon decreasing synergistic agent be spread in equably solid fuel (coke powder, coal dust or coal tar powder mix) above.
SINTERING PRODUCTION adopts the advantage of this environment-friendly type carbon decreasing synergistic agent to be:
1. result of use is obvious, and the following ton agglomerate of normal circumstances can reduce by 2～4 kilograms of solid fuel consumptions, improves output 3%～5%, improves intensity (tumbler index) 2～3 percentage points.
2. be applicable to the agglomerate of different basicity, different mineral.
3. consumption is low, and it is few to increase cost, and 0.1～0.4 kilogram of ton agglomerate consumption increases by 2.0～3.0 yuans of costs.
4. environment protecting is good, and this carbon decreasing synergistic agent does not have " chlorine " source, and sintering process does not produce hypertoxic gas (Dioxins).
Description of drawings
Fig. 1 is that the sintering carbon decreasing synergistic agent is with addition of the device technique diagrammatic sketch
1 carbon decreasing synergistic agent feed bin, 2 screw feeders, 3 electric vibrating feeders, the 4 sintered compound main belt of preparing burden
Embodiment
Adopt sintering carbon decreasing synergistic agent of the present invention, be used for certain factory's agglutinating test, its effect is listed in table 1.
Table 1 XAA sintering falls the C synergistic agent and is used for three steel testing datas
| The sintered material prescription | Utilization coefficient (t/m 2·h) | Yield rate (%) | Tumbler index (Ti+6.3%) | Finished product ore deposit FeO (%) | 900 ℃ of reductibilities (%) |
| Benchmark sample (0) | 1.303 | 71.6 | 61.5 | 9.60 | 88.0 |
| C Yield increasing type 1 type (0.35 ‰) falls | 1.621 | 68.4 | 63.7 | 9.40 | 89.8 |
| C enhancement type 2 types (0.35 ‰) fall | 1.451 | 72.0 | 69.6 | 8.80 | 97.0 |
Annotating: 1 type. C Yield increasing type prescription: 40%NaNO falls
3+ 35%H
2BO
3+ 15% bentonite+5%NaCO
3+ 5% fluorite
2 types. C enhancement type prescription: 25%NaNO falls
3+ 50%H
2BO
3+ 10% bentonite+10%NaCO
3+ 5% fluorite
The effect that is used for another company's agglutinating test, also be very much obvious, the solid burnup of its base period is the 52.61kg/t ore deposit, behind this carbon decreasing synergistic agent of adapted, reach under the constant substantially condition of utilization coefficient, yield rate, tumbler index, the agglomerating solid burnup is reduced to the 48.34kg/t ore deposit, and the solid burnup of agglomerate per ton has reduced 4.27kg.
Can prove absolutely by above example, adopt sintering environmental protection carbon decreasing synergistic agent of the present invention after, SINTERING PRODUCTION can significantly reduce solid burnup, improves output and intensity, reaches comprehensive effect of improving sinter quality.
Claims (3)
1. a carbon decreasing synergistic agent for iron ore powder sintering is characterized in that the composition weight percent is: 10%～50% SODIUMNITRATE, 10%～50% boric acid, 5%～25% bentonite, 5%～10% yellow soda ash, 5%～10% fluorite.
2. a kind of according to claim 1 carbon decreasing synergistic agent for iron ore powder sintering is characterized in that the composition weight percent is: 40%NaNO
3+ 35%H
2BO
3+ 15% bentonite+5%NaCO
3+ 5% fluorite.
3. a kind of as claimed in claim 1 or 2 carbon decreasing synergistic agent for iron ore powder sintering, it is characterized in that using method is: above dried ingredients is finely ground to 0.052mm, uniform mixing, the sealing pack, open pocket during use, pour the carbon decreasing synergistic agent hopper into, the synergistic agent add-on is 0.1 ‰ of compound dry weight～0.4 ‰; Adopt screw feeder and the dual control of electric vibrating feeder on the main belt with addition of the accurate cloth of ratio to sintered mix, require feeding device to be installed in the back of joining the carbon feed, so as to guarantee carbon decreasing synergistic agent be spread in equably coke powder, coal dust or coal tar powder mix above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100766221A CN101463422B (en) | 2009-01-12 | 2009-01-12 | Carbon decreasing synergistic agent for iron ore powder sintering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100766221A CN101463422B (en) | 2009-01-12 | 2009-01-12 | Carbon decreasing synergistic agent for iron ore powder sintering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101463422A true CN101463422A (en) | 2009-06-24 |
| CN101463422B CN101463422B (en) | 2011-01-05 |
Family
ID=40804213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100766221A Expired - Fee Related CN101463422B (en) | 2009-01-12 | 2009-01-12 | Carbon decreasing synergistic agent for iron ore powder sintering |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842388A (en) * | 2015-01-12 | 2016-08-10 | 内蒙古包钢钢联股份有限公司 | Method for measuring sodium carbonate in sintering synergist through acid-base titration |
| CN106689451A (en) * | 2017-01-04 | 2017-05-24 | 云南省农业机械研究所 | Material mixing device |
| CN114471308A (en) * | 2020-11-13 | 2022-05-13 | 石门县顺超科技发展有限公司 | Metallurgical powder carbon doping device |
-
2009
- 2009-01-12 CN CN2009100766221A patent/CN101463422B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842388A (en) * | 2015-01-12 | 2016-08-10 | 内蒙古包钢钢联股份有限公司 | Method for measuring sodium carbonate in sintering synergist through acid-base titration |
| CN106689451A (en) * | 2017-01-04 | 2017-05-24 | 云南省农业机械研究所 | Material mixing device |
| CN114471308A (en) * | 2020-11-13 | 2022-05-13 | 石门县顺超科技发展有限公司 | Metallurgical powder carbon doping device |
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| Publication number | Publication date |
|---|---|
| CN101463422B (en) | 2011-01-05 |
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Granted publication date: 20110105 Termination date: 20140112 |