CN104263452A - Special coal injection combustion-supporting additive for schreyerite blast furnaces and preparation method thereof - Google Patents
Special coal injection combustion-supporting additive for schreyerite blast furnaces and preparation method thereof Download PDFInfo
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- CN104263452A CN104263452A CN201410454983.6A CN201410454983A CN104263452A CN 104263452 A CN104263452 A CN 104263452A CN 201410454983 A CN201410454983 A CN 201410454983A CN 104263452 A CN104263452 A CN 104263452A
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Abstract
The invention belongs to the field of combustion-supporting additives, and particularly relates to a special coal injection combustion-supporting additive for schreyerite blast furnaces and a preparation method thereof. The combustion-supporting additive aims to solve the following technical problem: TiC, TiN and other refractory substances, which are generated in the schreyerite blast furnace due to low combustion rate, severely lower the metallurgical properties of the blast furnace slag and restrict the enhancement of the blast furnace productivity. In order to solve the technical problem, the special coal injection combustion-supporting additive for schreyerite blast furnaces comprises the following chemical components in percentage by mass: 5-15% of ferrocene, 5-20% of permanganate, 30-60% of calcium oxide-activated carbon mixture, 5-20% of organic solvent and 5-20% of rare-earth compound. The invention also provides a preparation method of the special coal injection combustion-supporting additive for schreyerite blast furnaces. The special coal injection combustion-supporting additive for schreyerite blast furnaces enhances the productivity of the schreyerite blast furnace, and has popularization meanings.
Description
Technical field
The invention belongs to perfect combustion catalyzer field, be specifically related to special coal powder injection perfect combustion catalyzer of schreyerite blast furnace and preparation method thereof.
Technical background
At present, blast furnace generally uses coal powder injection technology in smelting process, and along with the raising smelting cost of coal ejection ratio is also in continuous reduction.
Owing to climbing the cause specific of smelting steel schreyerite, can produce the refractory compounds such as TiC and TiN in its blast furnace, seriously reduce the metallurgical performance of blast-furnace slag, the production capacity limiting blast furnace improves.Schreyerite blast furnace and common ore deposit blast furnace phase specific fuel consumption are obviously higher (about high 50kg/t.Fe) simultaneously.Therefore schreyerite blast furnace is in the urgent need to by improving the rate of combustion of coal dust in blast furnace further with addition of a kind of suitable additive, reduces blast furnace fuel consumption, reduces refractory compound in schreyerite blast furnace simultaneously and produces, improve the metallurgical performance of slag.
Current domestic some some inventions promoting coal dust firing that occurred, but these all can only promote coal dust firing, do not reduce the function of the refractory compounds such as TiC and TiN, therefore can only be applied to power station, boiler and common ore deposit blast furnace, the demand of schreyerite blast furnace can not be met.
Summary of the invention
The technical problem to be solved in the present invention is that the rate of combustion of coal dust in schreyerite blast furnace is low, also can produce the refractory compounds such as TiC and TiN, seriously reduce the metallurgical performance of schreyerite blast-furnace slag, limit the raising of schreyerite blast furnace production capacity.
The scheme that the present invention solves the problems of the technologies described above is to provide the special coal powder injection perfect combustion catalyzer of a kind of schreyerite blast furnace.
The special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, its chemical composition comprises by mass percentage: ferrocene 5 ~ 15%, permanganate 5 ~ 20%, the mixture 30 ~ 60% of calcium oxide and gac, organic solvent 5 ~ 20% and rare earth compound 5 ~ 20%.
In the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described permanganate is at least one in calcium permanganate, magnesium permanganate, permanganic acid aluminium or permanganic acid iron.
In the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described organic solvent is at least one in methyl alcohol, ethanol or Virahol.
In the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described rare earth compound is at least one in lanthanum trioxide, cerium oxide, lanthanum nitrate or cerous nitrate.
In the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described calcium oxide and Mixture of Activated Carbon are the mixtures of calcium oxide and gac arbitrary proportion.
The particle diameter of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace is less than 20 millimeters.
The biodiversity per-cent of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace is less than 20%.
Present invention also offers the preparation method of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, comprise the following steps: according to ferrocene 5 ~ 15%, permanganate 5 ~ 20%, the mixture 30 ~ 60% of calcium oxide and gac, organic solvent 5 ~ 20% and rare earth compound 5 ~ 20% take raw material, are then mixed by raw material, then add water and carry out pressure ball, after drying, fragmentation and screening, obtain the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace.
In the preparation method of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described permanganate is at least one in calcium permanganate, magnesium permanganate, permanganic acid aluminium or permanganic acid iron.
In the preparation method of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described organic solvent is at least one in methyl alcohol, ethanol or Virahol.
In the preparation method of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described rare earth compound is at least one in lanthanum trioxide, cerium oxide, lanthanum nitrate or cerous nitrate.
In the preparation method of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described calcium oxide and Mixture of Activated Carbon are the mixtures of calcium oxide and gac arbitrary proportion.
In the preparation method of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described adds water, and be the water content of raw material when pressure ball making to mix is 8 ~ 20%.
In the preparation method of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described oven dry, refers to that oven dry to water content is 0 ~ 20%.The temperature of described oven dry is 50 ~ 300 DEG C, and the time of oven dry is 0.5 ~ 24 hour.
In the preparation method of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described screening, refers to the special coal powder injection perfect combustion catalyzer of titanium ore blast furnace sieving and obtain particle diameter and be less than 20 millimeters.
Present invention also offers the using method of above-mentioned schreyerite blast furnace special coal powder injection perfect combustion catalyzer: be added in raw coal by special for the schreyerite blast furnace of raw coal weight 1 ~ 10 ‰ coal powder injection perfect combustion catalyzer, grind together with raw coal and mix.The particle diameter of described grinding is determined according to the ability of iron work coal pulverizer.
The present invention not only reduces the fuel consumption of schreyerite blast furnace, also reduces the content of refractory compound in schreyerite blast furnace simultaneously, for blast furnace volume increase and reduce fuel cost contribute, meet the specific demand of schreyerite blast furnace.After adopting the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace provided by the invention, the content of the refractory compounds such as TiC and TiN in schreyerite blast furnace reduces more than 35%, the fuel ratio of schreyerite blast furnace reduces more than 10kg/t.Fe, improves the production capacity of schreyerite blast furnace, has dissemination.
Embodiment
The special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, its chemical composition comprises by mass percentage: ferrocene 5 ~ 15%, permanganate 5 ~ 20%, the mixture 30 ~ 60% of calcium oxide and gac, organic solvent 5 ~ 20% and rare earth compound 5 ~ 20%.
In the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, the content of described ferrocene, rare earth compound and permanganate is not if in above-mentioned scope, the schreyerite blast furnace special coal powder injection perfect combustion catalyzer then obtained without obvious energy-saving effect, also can increase the energy consumption of schreyerite blast furnace when using in schreyerite blast furnace time serious.
In the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described permanganate is at least one in calcium permanganate, magnesium permanganate, permanganic acid aluminium or permanganic acid iron.
In the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described organic solvent is at least one in methyl alcohol, ethanol or Virahol.
In the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described rare earth compound is at least one in lanthanum trioxide, cerium oxide, lanthanum nitrate or cerous nitrate.
In the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described calcium oxide and Mixture of Activated Carbon are the mixtures of calcium oxide and gac arbitrary proportion.
The particle diameter of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace is less than 20 millimeters.
The biodiversity per-cent of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace is less than 20%.
The preparation method of the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, comprise the following steps: according to ferrocene 5 ~ 15%, permanganate 5 ~ 20%, the mixture 30 ~ 60% of calcium oxide and gac, organic solvent 5 ~ 20% and rare earth compound 5 ~ 20% take raw material, are then mixed by raw material, then add water and carry out pressure ball, after drying, fragmentation and screening, obtain the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace.
In the preparation method of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, according to the initial water content determination amount of water of raw material, the water content of raw material when pressure ball mixed is made to be 8 ~ 20%.
In the preparation method of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, described oven dry, refers to that oven dry to water content is 0 ~ 20%.The temperature of described oven dry is 50 ~ 300 DEG C, and the time of oven dry is 0.5 ~ 24 hour.
In the preparation method of the special coal powder injection perfect combustion catalyzer of above-mentioned schreyerite blast furnace, the special coal powder injection perfect combustion catalyzer of titanium ore blast furnace obtaining particle diameter and be less than 20 millimeters is sieved in described screening.If sieve the titanium ore blast furnace special coal powder injection perfect combustion catalyzer particle diameter obtained to be greater than 20 millimeters, then cannot ensure the special coal powder injection perfect combustion catalyzer of above-mentioned titanium ore blast furnace accurately with addition of amount and uniformity coefficient in coal dust, and then significantly can reduce the effect of the refractory compound generations such as energy-conservation TiC and TiN with suppress schreyerite blast furnace in of above-mentioned schreyerite blast furnace special coal powder injection perfect combustion catalyzer in schreyerite blast furnace.
Embodiment 1
According to ferrocene weight ratio 8%, calcium permanganate weight ratio 15%, calcium oxide weight ratio 30%, activated carbon weight than 25%, methanol weight than 4%, ethanol weight ratio 4%, Virahol weight ratio 4%, cerium oxide weight ratio 4% and cerous nitrate weight ratio 6% mix, and the water carried out afterwards with addition of raw material total mass 8% carries out pressure ball, use after drying, fragmentation and screening at schreyerite blast furnace.
Before using the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, in schreyerite blast-furnace slag, the content of TiC and TiN refractory compound is approximately 0.71%, make the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace with after be about 0.43%, namely in schreyerite blast furnace, the total amount of refractory compound reduces 39.4%.
Before using the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, schreyerite blast furnace fuel ratio is approximately 581.9kg/t.Fe, is about 570.7kg/t.Fe after using the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, and namely schreyerite blast furnace fuel is than reducing 11.2kg/t.Fe.
Embodiment 2
According to ferrocene weight ratio 10%, magnesium permanganate weight ratio 5%, permanganic acid iron weight ratio 10%, calcium oxide weight ratio 28%, activated carbon weight is than 25%, and methanol weight is than 5%, Virahol weight ratio 8%, lanthana weight than 3% and lanthanum nitrate weight ratio 6% mix, the water carried out afterwards with addition of raw material total mass 5% carries out pressure ball, drying, fragmentation and screening after use at schreyerite blast furnace.
Before using the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, in schreyerite blast-furnace slag, the content of TiC and TiN refractory compound is approximately 0.69%, be about 0.42% after using the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, namely in schreyerite blast furnace, the total amount of refractory compound reduces 39.1%.
Before using the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, schreyerite blast furnace fuel ratio is approximately 575.6kg/t.Fe, is about 564.8kg/t.Fe after using the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, and namely blast furnace fuel is than reducing 10.8kg/t.Fe.
Embodiment 3
According to ferrocene weight ratio 6%, magnesium permanganate weight ratio 5%, permanganic acid iron weight ratio 10%, calcium permanganate weight ratio 5%, calcium oxide weight ratio 8%, activated carbon weight is than 51%, and methanol weight is than 3%, ethanol weight ratio 5%, lanthana weight than 3% and cerium oxide weight ratio 4% mix, the water carried out afterwards with addition of raw material total mass 11% carries out pressure ball, drying, fragmentation and screening after use at schreyerite blast furnace.
Before using the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, in schreyerite blast-furnace slag, the content of TiC and TiN refractory compound is approximately 0.70%, be about 0.44% after using the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, namely in schreyerite blast furnace, the total amount of refractory compound reduces 37.1%.
Before using the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, schreyerite blast furnace fuel ratio is approximately 573.8kg/t.Fe, is about 563.7kg/t.Fe after using the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, and namely blast furnace fuel is than reducing 10.1kg/t.Fe.
Adopt the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace provided by the invention, effectively can suppress the generation of the refractory compounds such as TiC and TiN in schreyerite blast furnace, reduce the fuel ratio of schreyerite blast furnace, improve schreyerite blast furnace production capacity.
Claims (10)
1. the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, its chemical composition comprises by mass percentage: ferrocene 5 ~ 15%, permanganate 5 ~ 20%, calcium oxide and Mixture of Activated Carbon 30 ~ 60%, organic solvent 5 ~ 20% and rare earth compound 5 ~ 20%.
2. the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace according to claim 1, is characterized in that: described permanganate is at least one in calcium permanganate, magnesium permanganate, permanganic acid aluminium or permanganic acid iron.
3. the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace according to claim 1, is characterized in that: described organic solvent is at least one in methyl alcohol, ethanol or Virahol.
4. the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace according to claim 1, is characterized in that: described rare earth compound is at least one in lanthanum trioxide, cerium oxide, lanthanum nitrate or cerous nitrate.
5. the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace according to claim 1, is characterized in that: described calcium oxide and Mixture of Activated Carbon, is the mixture of calcium oxide and gac arbitrary proportion.
6. the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace according to claim 1, is characterized in that: the particle diameter of the special coal powder injection perfect combustion catalyzer of described schreyerite blast furnace is less than 20 millimeters.
7. the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace according to claim 1, is characterized in that: the biodiversity per-cent of the special coal powder injection perfect combustion catalyzer of described schreyerite blast furnace is less than 20%.
8. the preparation method of the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace according to claim 1, comprise the following steps: according to ferrocene 5 ~ 15%, permanganate 5 ~ 20%, the mixture 30 ~ 60% of calcium oxide and gac, organic solvent 5 ~ 20% and rare earth compound 5 ~ 20% take raw material, are then mixed by raw material, then add water and carry out pressure ball, after drying, fragmentation and screening, obtain the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace.
9. the preparation method of the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace according to claim 8, is characterized in that: described adds water, and be the water content of raw material when pressure ball making to mix is 8 ~ 20%.
10. the using method of the special coal powder injection perfect combustion catalyzer of schreyerite blast furnace, is characterized in that: be added in raw coal by special for the schreyerite blast furnace of raw coal weight 1 ~ 10 ‰ coal powder injection perfect combustion catalyzer, grinds and mix rear for blast furnace together with raw coal.
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| CN201410454983.6A CN104263452A (en) | 2014-09-09 | 2014-09-09 | Special coal injection combustion-supporting additive for schreyerite blast furnaces and preparation method thereof |
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Cited By (2)
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| CN105238492A (en) * | 2015-10-15 | 2016-01-13 | 阳开金 | Coal-saving combustion-supporting preparation and preparation method thereof |
| CN109135867A (en) * | 2018-09-19 | 2019-01-04 | 郑州市晟火冶金节能材料有限公司 | Solid combustion-supporting agent for fuel coal for blast furnace |
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