CN100519711C - Coke passivator and preparation method thereof - Google Patents
Coke passivator and preparation method thereof Download PDFInfo
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- CN100519711C CN100519711C CNB2007101950270A CN200710195027A CN100519711C CN 100519711 C CN100519711 C CN 100519711C CN B2007101950270 A CNB2007101950270 A CN B2007101950270A CN 200710195027 A CN200710195027 A CN 200710195027A CN 100519711 C CN100519711 C CN 100519711C
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Abstract
The invention belongs to the technical field of ironmaking, in particular relating to a coke passivator and process for preparation. The coke passivator is produced by the raw materials at different part by weight, including 15-30 parts of boracic acid, 15-30 parts of borax, 30-50 parts of high magnesium powder, 5-15 parts of aluminum silicon powder, and 5-20 parts of calcium silicon powder. The coke passivator can uniformly form a layer of protective coating, which can reduce the erosion of the coke caused by CO2, decrease the reactivity of the coke, increase the coke strength after reaction, improve the utilization coefficient and the service life of the blast fumace and reduce the coke ratio. Utilizing the concentration of 0.3kg/t can reduce the reactivity of the coke by 5%, increase the coke strength after reaction by 7% and improve the production of the blast furnace by more than 3%-5%. The invention is an ideal product for blast furnace ironmaking which has the advantages of saving energy, reducing consumption, increasing production, improving benefits and protecting environment.
Description
(1) technical field
The invention belongs to the ironmaking technology field, particularly a kind of coke deactivator and preparation method thereof.
(2) background technology
Coke is the important fuel of blast-furnace smelting, plays the vital role of thermal source, reductive agent, carburizing agent and stock column skeleton in blast furnace.In the above high-temperature zone of blast furnace stack cohesive zone, reaction is fierce carrying out on the pore surface of coke, good more then its melting loss of the reactivity of coke is big more, make coke form a large amount of pores and air vent wall attenuation, hot strength reduces, produce a large amount of powder, significantly weakened the skeleton and the supporting role of coke.Blast furnace shows as central gas stream and dies down, the edge air-flow strengthens, central core increases, the broken burnt amount in the air port and the district of circling round increases, the ventilation property variation of cupola well, the degree of depth of iron mouth reduces, and influences the direct motion of blast furnace, can cause also that blast furnace directly reduces raises and the utilization of coal gas chemical energy reduces, and causes the coke ratio rising.Especially modern blast furnace adopts the strengthening smelting measure of big air quantity, high wind-warm syndrome and high-coal ratio, and the high temperature metallurgical properties of coke is that the reactivity and the post-reaction strength performance of coke become the restrictive factor that injecting coal quantity is further strengthened and enlarge to blast furnace.Thereby the reduction coke reactivity, improve post-reaction strength, improve the common recognition that high temperature metallurgical properties has become the ironmaking circle.
The effect of coke deactivator is exactly to be mixed with certain density solution; after being sprayed at coke surface; be adsorbed on coke surface after making dissolved substance through the dehydration crystallization and form layer protecting film; the particles filled coke-blowhole of part; stop the reaction of carbonic acid gas and coke and to the coke internal divergence; thereby reach the purpose that reduces coke reactivity, improves postreaction strength of coke; the raising of coke quality; guaranteed that smooth operation of furnace, damping down and air port scaling loss reduce, coke ratio reduces, the capacity factor of a blast furnace increases, converter life improves.
There is following problem in present coke deactivator more: composition of raw material is single, the cost height; Just can reach certain passivation effect under the prerequisite of big usage quantity, energy consumption is big.
(3) summary of the invention
The object of the present invention is to provide a kind of coke deactivator, can bring into play coke passivation preferably under less consumption, and cost is low, the preparation method is simple.
The technical solution used in the present invention is as follows:
Coke deactivator, make by the raw material of following weight part:
Boric acid 15-30 part, borax 15-30 part, high magnesium powder 30-50 part, aluminum silicon powder 5-15 part, silicon calcium powder 5-20 part.
Preferably, described passivator is made by the raw material of following weight part: boric acid 20-30 part, borax 15-20 part, high magnesium powder 30-40 part, aluminum silicon powder 5-15 part, silicon calcium powder 10-20 part.
Effective constituent in the passivator of the present invention mainly is B
2O
3, MgO, CaO, SiO
2, Al
2O
3, each components in proportions is roughly 30-50:20-50,2-5,1-3,1-2, also inevitably brings small amount of Fe in the raw material into
2O
3, BaO impurity, but to not influence of the use of passivator.
For fear of introducing too much impurity, content of effective should satisfy following requirement in each raw material:
Boric acid: B
2O
3〉=48.5%; Borax: B
2O
3〉=35%; High magnesium powder: MgO 〉=85%; Aluminum silicon powder: SiO
2〉=40%, Al
2O
3〉=30%; Silicon calcium powder: SiO
2〉=30%, CaO 〉=25%.
The present invention also provides a kind of preparation method of described coke deactivator, and boric acid, borax, high magnesium powder, aluminum silicon powder, silicon calcium powder according to proportion ingredient, are concentrated, dry cooling then.
Concentrating is to carry out under the condition of constantly heat supply and chemical energy and strong mixing, also has the function of superpower purification in the mixed uniformly process of raw material, is removed in vaporescence as impurity elements such as K, Na.Because potassium, sodium or its carbonate can partly enter the crystalline structure interlayer of carbon, form intercalation compound, be partially submerged into interlayer and exist with molecularity, also have part to form surface complex at the surface and the carbon atom of carbon; Under the katalysis of potassium, sodium or its carbonate, the melting loss of coke is accelerated, reduced the thermal characteristics of coke, and the resultant of coke inside volume in reaction process increases, destroy the structure of coke, reduced the post-reaction strength of coke, the potassium, the sodium element content that therefore reduce in the passivator are very crucial to the performance of optimizing coke deactivator; Present method has solved the problem that product easily lumps, impurity can't be removed compared to direct batching and blended preparation method.
Preferably, be concentrated into B in the batching
2O
3, MgO, CaO, SiO
2, Al
2O
3Dry again cooling after the quality total content is not less than 80%, the preferred 250-300 of drying temperature ℃, cooling is to expect that temperature is not higher than 30 ℃ and is advisable.
The present invention has following advantage with respect to prior art:
Described coke deactivator can evenly form layer protecting film in coke surface, reduces CO
2Washing away of STRENGTH ON COKE, reduce the reactivity of coke, improve the post-reaction strength of coke, improve the utilization coefficient and the life-span of blast furnace, reduce coke ratio, adopt the concentration of 0.3kg/t can reduce coke reactivity 5%, improve post-reaction strength about 7%, two addition iron per ton are saved about 80 kilograms of coke ratios, and only the coke ratio individual event descends surplus the ton iron cost 50 yuan, can improve more than the furnace processor 3-5% simultaneously, be the ideal product with blast furnace ironmaking of energy-conservation, consumption reduction, volume increase, synergy, environment protecting.
(4) embodiment:
Below with specific embodiment technical scheme of the present invention is described, but protection scope of the present invention is not limited thereto:
Embodiment 1
With boric acid (B
2O
3〉=48.5%) borax (B,
2O
3〉=35%), high magnesium powder (MgO 〉=85%), aluminum silicon powder (SiO
2〉=40%, Al
2O
3〉=30%) silicon calcium powder (SiO,
2〉=30%, CaO 〉=25%) mass ratio according to 30:20:40:5:5 mixes, and is concentrated into B then under the condition of strong mixing
2O
3, MgO, CaO, SiO
2, Al
2O
3The quality total content is not less than 80%, after under 250 ℃ the condition dry 30 minutes, is cooled to the material temperature and is not higher than 30 ℃, is finished product after the packing.
It is 6% the aqueous solution that described coke deactivator is mixed with mass concentration, uses the amount of 0.3kg coke deactivator to spray on coke according to coke per ton then, and coke per ton reduces coke reactivity 5% in combustion processes, improves post-reaction strength 7.1%.
Embodiment 2
Boric acid, borax, high magnesium powder, aluminum silicon powder, silicon calcium powder are mixed according to the mass ratio of 20:20:40:10:10, under the condition of strong mixing, be concentrated into B then
2O
3, MgO, CaO, SiO
2, Al
2O
3The quality total content is not less than 80%, after under 280 ℃ the condition dry 30 minutes, is cooled to the material temperature and is not higher than 30 ℃, is finished product after the packing.Each material purity is with embodiment 1.
The using method of coke deactivator is with example 1, and coke per ton reduces coke reactivity 3.8%. and improves post-reaction strength 5.5% in combustion processes.
Embodiment 3
Boric acid, borax, high magnesium powder, aluminum silicon powder, silicon calcium powder are mixed according to the mass ratio of 20:20:30:10:20, under the condition of strong mixing, be concentrated into B then
2O
3, MgO, CaO, SiO
2, Al
2O
3The quality total content is not less than 80%, after under 300 ℃ the condition dry 30 minutes, is cooled to the material temperature and is not higher than 30 ℃, is finished product after the packing.Each material purity is with embodiment 1.
The using method of coke deactivator is with embodiment 1, and coke per ton reduces coke reactivity 7.1% in combustion processes, improves post-reaction strength 8.7%.
Claims (5)
1. coke deactivator is characterized in that being made by the raw material of following weight part: boric acid 15-30 part, borax 15-30 part, high magnesium powder 30-50 part, aluminum silicon powder 5-15 part, silicon calcium powder 5-20 part; Content of effective satisfies following the requirement in each raw material: boric acid: B
2O
3〉=48.5%; Borax: B
20
3〉=35%; High magnesium powder: MgO 〉=85%; Aluminum silicon powder: SiO
2〉=40%, Al
2O
3〉=30%; Silicon calcium powder: SiO
2〉=30%, CaO 〉=25%.
2. coke deactivator as claimed in claim 1 is characterized in that being made by the raw material of following weight part: boric acid 20-30 part, borax 15-20 part, high magnesium powder 30-40 part, aluminum silicon powder 5-15 part, silicon calcium powder 10-20 part.
3. the preparation method of coke deactivator as claimed in claim 1 or 2 is characterized in that boric acid, borax, high magnesium powder, aluminum silicon powder, silicon calcium powder according to proportion ingredient, concentrates then, dry cooling.
4. the preparation method of coke deactivator as claimed in claim 3 is characterized in that being concentrated into the B in the batching
2O
3, MgO, CaO, SiO
2, Al
2O
3The quality total content is not less than 80%.
5. the preparation method of coke deactivator as claimed in claim 3 is characterized in that described drying temperature is 250-300 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101950270A CN100519711C (en) | 2007-12-11 | 2007-12-11 | Coke passivator and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101950270A CN100519711C (en) | 2007-12-11 | 2007-12-11 | Coke passivator and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101186853A CN101186853A (en) | 2008-05-28 |
| CN100519711C true CN100519711C (en) | 2009-07-29 |
Family
ID=39479469
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|---|---|---|---|
| CNB2007101950270A Active CN100519711C (en) | 2007-12-11 | 2007-12-11 | Coke passivator and preparation method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN100519711C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112899052A (en) * | 2021-01-21 | 2021-06-04 | 重庆大学 | Hydrogen inhibitor and method for producing high-quality metallurgical coke by adding large-proportion high-volatility bituminous coal under action of hydrogen inhibitor |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338206B (en) * | 2008-08-29 | 2012-08-22 | 攀钢集团研究院有限公司 | Coking additive agent and use thereof |
| CN101629117A (en) * | 2009-08-04 | 2010-01-20 | 郑州大学 | High effective coke degradation inhibitor and preparation method thereof |
| CN102071081B (en) * | 2009-11-24 | 2012-04-25 | 河北瑞港南洋化工科技有限公司 | Passivated coke and preparation method thereof |
| CN102071084B (en) * | 2009-11-24 | 2012-04-25 | 河北瑞港南洋化工科技有限公司 | Coke passivating agent composition and preparation method thereof |
| CN102041129B (en) * | 2010-12-02 | 2015-11-25 | 中国科学院过程工程研究所 | A kind of comprise micro-additive coke deactivator and preparation and using method |
| CN102839033B (en) * | 2012-08-27 | 2013-10-23 | 中南大学 | Biomass fuel passivation method and application of passivation products in iron ore sintering |
| CN105838474A (en) * | 2016-05-31 | 2016-08-10 | 无锡伊佩克科技有限公司 | Chromium-free coke passivator and method for preparing same |
| CN109022098B (en) * | 2018-08-17 | 2020-08-28 | 宁波敬业控股集团有限公司 | Coke passivator and preparation method thereof |
-
2007
- 2007-12-11 CN CNB2007101950270A patent/CN100519711C/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112899052A (en) * | 2021-01-21 | 2021-06-04 | 重庆大学 | Hydrogen inhibitor and method for producing high-quality metallurgical coke by adding large-proportion high-volatility bituminous coal under action of hydrogen inhibitor |
| CN112899052B (en) * | 2021-01-21 | 2022-01-25 | 重庆大学 | Hydrogen inhibitor and method for producing coke by adding large-proportion high-volatility bituminous coal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101186853A (en) | 2008-05-28 |
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