CN102071084B - Coke passivating agent composition and preparation method thereof - Google Patents
Coke passivating agent composition and preparation method thereof Download PDFInfo
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- CN102071084B CN102071084B CN2009102248104A CN200910224810A CN102071084B CN 102071084 B CN102071084 B CN 102071084B CN 2009102248104 A CN2009102248104 A CN 2009102248104A CN 200910224810 A CN200910224810 A CN 200910224810A CN 102071084 B CN102071084 B CN 102071084B
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- 239000000571 coke Substances 0.000 title claims abstract description 106
- 238000002360 preparation method Methods 0.000 title claims description 6
- 239000000203 mixture Substances 0.000 title abstract description 15
- 239000003795 chemical substances by application Substances 0.000 title abstract description 8
- 239000006229 carbon black Substances 0.000 claims abstract description 49
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 48
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000004327 boric acid Substances 0.000 claims abstract description 32
- 239000001038 titanium pigment Substances 0.000 claims description 35
- 239000002245 particle Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 6
- 230000009257 reactivity Effects 0.000 abstract description 17
- 238000006243 chemical reaction Methods 0.000 abstract description 15
- 230000009467 reduction Effects 0.000 abstract description 7
- 230000002829 reductive effect Effects 0.000 abstract description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 6
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 235000010215 titanium dioxide Nutrition 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000007921 spray Substances 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 229960001866 silicon dioxide Drugs 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 229910052810 boron oxide Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- MOWNZPNSYMGTMD-UHFFFAOYSA-N oxidoboron Chemical class O=[B] MOWNZPNSYMGTMD-UHFFFAOYSA-N 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 238000005255 carburizing Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention provides a coke passivating agent composition, which, based on the total weight of the passivating agent composition, comprises 75 to 92 weight percent of boric acid, 5 to 15 weight percent of titanium white and 1 to 10 weight percent of white carbon black. When the coke passivating agent composition provided by the invention is used for passivating coke, the reactivity of the coke can be reduced obviously, the strength and quality after reaction of the coke are improved, the smooth operation of blast furnace is ensured, and energy conservation and consumption reduction are realized.
Description
Technical field
The present invention relates to a kind of coke deactivator composition and method of making the same.
Background technology
Coke is the important fuel of blast-furnace smelting, and it plays a part thermal source, reductive agent, carburizing agent and stock column skeleton in blast furnace.Along with the maturation of fuel injection technology is used, coke is weakened as the effect of thermal source, reductive agent and carburizing agent gradually, and along with the development of ironmaking technology; Modern blast furnace is smelted and have been obtained further development, and along with the reduction of coke ratio, the extra-high-speed of combustion intensity; Coke load increases, and the residence time of coke in blast furnace prolongs, and dissolving loss rate increases; The coke quality deterioration, at this moment, coke effect as the stock column skeleton in stove is more and more important; Particularly its result can influence its intensity after high reaction in furnace, and wherein, coke thermal response performance mainly refers to coke reactivity and reacted intensity.The blast-furnace coke reactivity be meant coke in blast furnace with the response capacity of dioxide gas.Reacted coke loses intensity because of the air vent wall attenuation simultaneously because of the weightless crack that produces.If coke reactivity is excessive, will make the strength degradation of coke, produce more broken Jiao and coke powder, thereby can weaken the stock column skeleton function of coke in blast furnace, worsened blast furnace permeability, influence smooth operation of furnace.Therefore, for smooth operation of furnace, reduce the reactivity (CRI) of coke, it is imperative to improve postreaction strength of coke (CSR).
Summary of the invention
The object of the present invention is to provide a kind of coke deactivator compsn and this coke deactivator preparation of compositions method; Make it possible to significantly reduce the reactivity of coke, improve postreaction strength of coke, improve coke quality; Guarantee smooth operation of furnace, to reach energy saving purposes.
The invention provides a kind of coke deactivator compsn; Wherein, This passivator compsn contains boric acid, white titanium pigment and WHITE CARBON BLACK, is benchmark with the gross weight of this passivator compsn, and the content of said boric acid is 75-92 weight %; The content of said white titanium pigment is 5-15 weight %, and the content of said WHITE CARBON BLACK is 1-10 weight %.
The present invention also provides a kind of preparation method of coke deactivator; Wherein, This method comprises boric acid, white titanium pigment and WHITE CARBON BLACK mixed, and the consumption of each material makes that the gross weight with this passivator compsn is a benchmark, and the content of boric acid is 75-92 weight %; The content of white titanium pigment is 5-15 weight %, and the content of WHITE CARBON BLACK is 1-10 weight %.
After adopting coke deactivator compsn STRENGTH ON COKE provided by the invention to carry out Passivation Treatment, can significantly reduce the reactivity of coke, improve postreaction strength of coke and coke quality, guarantee smooth operation of furnace effectively, and reached energy saving purposes.
Embodiment
According to the present invention, said coke deactivator compsn contains boric acid, white titanium pigment and WHITE CARBON BLACK, is benchmark with the gross weight of this passivator compsn, and the content of said boric acid can be 75-92 weight %, is preferably 80-90 weight %; The content of said white titanium pigment can be 5-15 weight %, is preferably 6-12 weight %; The content of said WHITE CARBON BLACK can be 1-10 weight %, is preferably 2-8 weight %.
Contriver of the present invention finds; Though the weight ratio between white titanium pigment and the WHITE CARBON BLACK can be adjusted in above-mentioned scope; But; The weight ratio of white titanium pigment and WHITE CARBON BLACK is preferably 1.5-5 in said coke deactivator compsn: 1, and after STRENGTH ON COKE was handled, the reduction of coke reactivity and the raising of post-reaction strength were more remarkable.
Under the preferable case, coke deactivator compsn according to the invention can also contain carbon black; Gross weight with this passivator compsn is a benchmark, and the content of said boric acid can be 75-92 weight %, is preferably 80-90 weight %; The content of said white titanium pigment can be 5-15 weight %, is preferably 6-12 weight %; The content of said WHITE CARBON BLACK can be 1-10 weight %, is preferably 2-8 weight %; Said sooty content can be 1-10 weight %, is preferably 2-8 weight %.
Wherein, sooty add also help further STRENGTH ON COKE and handle after, the reduction of coke reactivity and the raising of post-reaction strength.
According to the present invention; Though the weight ratio between WHITE CARBON BLACK and the carbon black can be adjusted in above-mentioned scope,, when WHITE CARBON BLACK and sooty weight ratio are preferably 2-8: 1; After STRENGTH ON COKE was handled, the reduction of coke reactivity and the raising of post-reaction strength were more remarkable.
According to the present invention; The preparation method of said coke deactivator comprises boric acid, white titanium pigment and WHITE CARBON BLACK is mixed; The feasible gross weight with this passivator compsn of the consumption of each material is a benchmark, and the content of boric acid can be 75-92 weight %, is 80-90 weight %; The content of white titanium pigment can be 5-15 weight %, is preferably 6-12 weight %; The content of WHITE CARBON BLACK can be 1-10 weight %, is preferably 2-8 weight %; Sooty content can be 1-10 weight %, is preferably 2-8 weight %.
The charge weight of white titanium pigment and WHITE CARBON BLACK than and white titanium pigment can in above-mentioned scope, adjust with the charge weight ratio of boric acid, under the preferable case, the charge weight of white titanium pigment and WHITE CARBON BLACK is than 1.5-5: 1; The weight ratio of boric acid and white titanium pigment is 5-12: 1.
According to the present invention, this method also comprises mixes carbon black with boric acid, white titanium pigment and WHITE CARBON BLACK, and said mixing can be carried out also simultaneously can proceed step by step; The order by merging of each material to the not influence of performance of many passivator compsn, for example, can each material make that the gross weight with this passivator compsn is a benchmark; The content of boric acid is 75-92 weight %; The content of white titanium pigment is 5-15 weight %, and the content of WHITE CARBON BLACK is 1-10 weight %, and sooty content is 1-10 weight %.
WHITE CARBON BLACK and sooty charge weight ratio can be adjusted in above-mentioned scope, and under the preferable case, WHITE CARBON BLACK is 2-8 with sooty charge weight ratio: 1.
WHITE CARBON BLACK is the general name of white powder X-ray amorphous silicic acid and silicate product.WHITE CARBON BLACK is a porous material, and it forms available SiO
2NH
2O representes, wherein nH
2O is that the form with surface hydroxyl exists.It has high temperature resistant, do not fire, tasteless, do not have and to smell and have a good electrical insulating property.The present invention is to the selectable range broad of the requirement of the particle diameter of said WHITE CARBON BLACK, and under the preferable case, the particle diameter of said WHITE CARBON BLACK is less than 6.5 microns (more than 2000 orders), more preferably 4.5-6.5 microns.
But the present invention is to the selective reaction broad of the requirement of said sooty particle diameter, and under the preferable case, said sooty particle diameter is less than 6.5 microns (more than 2000 orders).
Select WHITE CARBON BLACK and the carbon black of particle diameter in above-mentioned preferable range; Can help the time this passivator compositions-treated coke; Short grained carbon black and WHITE CARBON BLACK are adsorbed on coke surface and are packed into coke-blowhole; Stop coke with carbon dioxide reaction with to the coke internal divergence, thereby further reach the reduction coke reactivity, the purpose of raising postreaction strength of coke.
The white titanium pigment formal name used at school is a titanium oxide.It has rutile-type (Rutile R type) and two kinds of structures of anatase titanium dioxide (Auatase A type).The present invention does not limit the kind of white titanium pigment is special, can be rutile-type and/or anatase titanium dioxide, still, takes all factors into consideration cost and effect, and the present invention preferably adopts anatase titanium dioxide.Under the preferable case, better adhere to and adsorption in order to make it to reach, the particle diameter of said white titanium pigment can be the 0.1-0.5 micron, more preferably less than 0.35 micron.
The method of use of coke deactivator compsn of the present invention can adopt the method for well known to a person skilled in the art to carry out; For example, the suspension-s that the water of coke deactivator and 70-90 ℃ is formed, and this suspension-s contacted with coke; The mode of said contact can adopt the conventional various ways of contact in this area; Be preferably the mode of sprinkling, for example, be sprayed directly on cold coke surface or be sprayed directly on 1000-1400 ℃ hot coke surface through the suspension-s of coke quenching tower with this passivator compsn and water; Perhaps on the equipment of transportation coke, spray the suspension-s of the water of this passivator compsn, Jiao of drying in the air then to coke surface.(solid content in the suspension-s of the water of said passivator compsn can be 0.5-1.5 weight %).Under the preferable case, the consumption of the suspension-s of the water of this passivator compsn is that the 1-2 of weight of coke doubly is advisable.
Through specific embodiment the present invention is further described in detail below.
Embodiment 1-9
Present embodiment is used to explain coke deactivator preparation of compositions provided by the invention.
The carbon black that boric acid, white titanium pigment, WHITE CARBON BLACK and selectivity are contained mixes, and obtains coke deactivator compsn T1-T9 provided by the invention.
Table 1 has provided the composition of T1-T9.
Table 1
Wherein, white titanium pigment obtains (particle diameter is the 0.2-0.3 micron) by du pont company; WHITE CARBON BLACK obtains (particle diameter is the 4.5-6.5 micron) by Shanghai Xi Meng chemical industry ltd; Carbon black obtains (particle diameter is the 4.5-6.5 micron) by the happy wound chemical industry in Shanghai; Boric acid is by the grand middle Russian boric acid of believing that chemical industry ltd buys of Wuhu City's brightness.
Comparative Examples 1-3
89 weight % boric acid, 1 weight % white titanium pigment, 10 weight % boron oxides are mixed, obtain reference coke deactivator compsn C1;
82 weight % boric acid, 3 weight % white titanium pigments, 15 weight % boron oxides are mixed, obtain reference coke deactivator compsn C2;
70 weight % boric acid, 5 weight % white titanium pigments, 25 weight % boron oxides are mixed, obtain reference coke deactivator compsn C3.
Comparative Examples 4-7
90 weight % boric acid, 5 weight % boraxs and 5 weight % silicon-dioxide are mixed, obtain reference coke deactivator compsn C4;
90 weight % boric acid and 10 weight % silicon-dioxide are mixed, obtain reference coke deactivator compsn C5;
80 weight % boric acid, 20 weight % silicon-dioxide are mixed, obtain reference coke deactivator compsn C6;
70 weight % boric acid and 30 weight % silicon-dioxide are mixed, obtain reference coke deactivator compsn C7.
Embodiment 10-18
Present embodiment is used to explain the performance test of handling forward and backward coke reactivity and reaction back coke strenth with coke deactivator compsn STRENGTH ON COKE.
The passivator compsn T1-T9 that respectively embodiment 1-9 is made mixes with 75 ℃ water that to obtain solid content be that the aqeous suspension of the passivator compsn of 1 weight % places coke quenching tower; And burnt car is delivered under the coke quenching tower; The aqeous suspension of this passivator compsn evenly is sprayed at 1350 ℃ coke surface, and (ltd produces by the sharp coalification in sky; Void content 40%), coke per ton sprays the aqeous suspension of 1 ton of said passivator compsn, and the defocused passivation coke that obtains dries in the air.And be determined at before the aqeous suspension that sprays the passivator compsn on the coke and afterwards reactivity (CRI) % and post-reaction strength (CSR) % according to GB/T4000-1996; The result is as shown in table 2, and the blank in the table 2 representes to spray the aqeous suspension coke before of passivator compsn.
Table 2
| The embodiment numbering | The passivator composition no | Reactive (CRI) % | Post-reaction strength (CSR) % |
| Blank | - | 38.4 | 46.8 |
| Embodiment 10 | T1 | 23.2 | 66.5 |
| Embodiment 11 | T2 | 25.4 | 61.3 |
| Embodiment 12 | T3 | 24.3 | 64.3 |
| Embodiment 13 | T4 | 25.6 | 61.5 |
| Embodiment 14 | T5 | 25.6 | 61.5 |
| Embodiment 15 | T6 | 27.8 | 59.1 |
| Embodiment 16 | T7 | 26.2 | 56.2 |
| Embodiment 17 | T8 | 26.9 | 57.1 |
| Embodiment 18 | T9 | 24.6 | 64.3 |
Comparative Examples 8-14
This Comparative Examples is used to explain the performance test of handling forward and backward coke reactivity and reaction back coke strenth with coke deactivator compsn STRENGTH ON COKE.
Measure STRENGTH ON COKE according to the method for embodiment 10-18 and handle forward and backward coke reactivity and reaction back coke strenth, different is the C1-C7 of used passivator compsn for being made by Comparative Examples 1-7.The result is as shown in table 3, and the blank in the table 3 representes to spray the aqeous suspension coke before of passivator compsn.
Table 3
| The Comparative Examples numbering | The passivator composition no | Reactive (CRI) % | Post-reaction strength (CSR) % |
| Blank | - | 38.4 | 46.8 |
| Comparative Examples 8 | C1 | 18.4 | 57.8 |
| Comparative Examples 9 | C2 | 24.4 | 55.6 |
| Comparative Examples 10 | C3 | 25.5 | 54.6 |
| Comparative Examples 11 | C4 | 17.9 | 55.8 |
| Comparative Examples 12 | C5 | 23.4 | 57.8 |
| Comparative Examples 13 | C6 | 28.4 | 55.3 |
| Comparative Examples 14 | C7 | 25.4 | 54.8 |
Can find out from The above results, adopt passivator compsn STRENGTH ON COKE of the present invention to handle after, the conditions of blast furnace stable smooth operation in the least possible reduction coke reactivity, makes the post-reaction strength of coke obtain significant enhancing.And adopt handle by the passivator compsn STRENGTH ON COKE of Comparative Examples after; Though the post-reaction strength of coke also is improved; But be cost but with the reactivity of sacrificing coke significantly, the smooth operation of furnace when adopting such coke and being unfavorable for blast-furnace smelting, and cost is too high.In addition; The coke that adopts the coke after the passivator compositions-treated of the present invention and handle is smelted pig iron experiment at 350 cubic metres of blast furnaces respectively; Main smelting process comprises: with the weight ratio mixing according to 4: 1 of the mixture of agglomerate and lump ore (emerging cast tube group company produce) and coke; And pack in the blast furnace by top charging equipment, go into stove and contain powder less than 3 weight %; in batches The cold wind that gas blower is seen off is blown into cupola well from the air port after hotblast stove is heated to 1200 ℃, 100 kPas of top pressures, and spray into coal dust through the air port, burning together, and smelt the pig iron under the same conditions; With embodiment 1 is example, adopt after the passivator compositions-treated that this embodiment 1 makes coke and the coke ratio of handling, daily output iron increases to 1940.57 tons by 1890 tons, has improved more than 2.8%; Coke ratio is reduced to 372.15 kg/ton iron by 388.5 kg/ton iron, has reduced by 4.6%; Coal is reduced to 134.05 kg/ton iron than by 135.65 kg/ton, has reduced by 1.2%.
Claims (10)
1. coke deactivator compsn; It is characterized in that this passivator compsn contains boric acid, white titanium pigment, WHITE CARBON BLACK and carbon black, is benchmark with the gross weight of this passivator compsn; The content of said boric acid is 75-92 weight %; The content of said white titanium pigment is 5-15 weight %, and the content of said WHITE CARBON BLACK is 1-10 weight %, and said sooty content is 1-10 weight %.
2. coke deactivator compsn according to claim 1; It is characterized in that; Gross weight with this passivator compsn is a benchmark, and the content of said boric acid is 80-90 weight %, and the content of said white titanium pigment is 6-12 weight %; The content of said WHITE CARBON BLACK is 2-8 weight %, and said sooty content is 2-8 weight %.
3. passivator compsn according to claim 1 and 2, wherein, WHITE CARBON BLACK and sooty weight ratio are 2-8: 1.
4. passivator compsn according to claim 3, wherein, the particle diameter of said WHITE CARBON BLACK is less than 6.5 microns; Said sooty particle diameter is less than 6.5 microns.
5. passivator compsn according to claim 1 and 2, wherein, the weight ratio of white titanium pigment and WHITE CARBON BLACK is 1.5-5: 1; The weight ratio of boric acid and white titanium pigment is 5-12: 1.
6. the preparation method of the said coke deactivator of claim 1; It is characterized in that this method comprises boric acid, white titanium pigment, WHITE CARBON BLACK and carbon black are mixed, each material make that the gross weight with this passivator compsn is a benchmark; The content of boric acid is 75-92 weight %; The content of white titanium pigment is 5-15 weight %, and the content of WHITE CARBON BLACK is 1-10 weight %, and sooty content is 1-10 weight %.
7. method according to claim 6, wherein, the feasible gross weight with this passivator compsn of each material is a benchmark; The content of boric acid is 80-90 weight %; The content of white titanium pigment is 6-12 weight %, and the content of WHITE CARBON BLACK is 2-8 weight %, and sooty content is 2-8 weight %.
8. according to claim 6 or 7 described methods, wherein, the weight ratio of white titanium pigment and WHITE CARBON BLACK is 1.5-5: 1; The weight ratio of boric acid and white titanium pigment is 5-12: 1.
9. according to claim 6 or 7 described methods, wherein, WHITE CARBON BLACK and sooty weight ratio are 2-8: 1.
10. method according to claim 9, wherein, the particle diameter of said WHITE CARBON BLACK is less than 6.5 microns; Said sooty particle diameter is less than 6.5 microns.
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| CN110760320A (en) * | 2019-11-15 | 2020-02-07 | 内蒙古泽元祥化工材料有限公司 | Coke thermal structure reinforcer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999064636A1 (en) * | 1998-06-09 | 1999-12-16 | Betzdearborn Inc. | Coal combustion enhancer and method of using in blast furnace |
| CN1392223A (en) * | 2002-04-30 | 2003-01-22 | 重庆大学 | Coke modifying process |
| CN1730628A (en) * | 2005-08-15 | 2006-02-08 | 安阳钢铁集团有限责任公司 | Coke passivator and its usage |
| CN101186853A (en) * | 2007-12-11 | 2008-05-28 | 河南通宇冶材集团有限公司 | Coke passivator and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999064636A1 (en) * | 1998-06-09 | 1999-12-16 | Betzdearborn Inc. | Coal combustion enhancer and method of using in blast furnace |
| CN1392223A (en) * | 2002-04-30 | 2003-01-22 | 重庆大学 | Coke modifying process |
| CN1730628A (en) * | 2005-08-15 | 2006-02-08 | 安阳钢铁集团有限责任公司 | Coke passivator and its usage |
| CN101186853A (en) * | 2007-12-11 | 2008-05-28 | 河南通宇冶材集团有限公司 | Coke passivator and preparation method thereof |
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