CN1730628B - Coke passivator and its usage - Google Patents
Coke passivator and its usage Download PDFInfo
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- CN1730628B CN1730628B CN 200510017909 CN200510017909A CN1730628B CN 1730628 B CN1730628 B CN 1730628B CN 200510017909 CN200510017909 CN 200510017909 CN 200510017909 A CN200510017909 A CN 200510017909A CN 1730628 B CN1730628 B CN 1730628B
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- coke
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- boric acid
- deactivator
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Abstract
The invention provides a coke deactivator for blast furnace iron-smelting, whose components include (by weight percent): boracic acid 70-90%, and borax 0-10%, and silica dioxide 5-30%. The coke deactivator is mixed with hot water to prepare 1-4% modified solution, and sprayed onto the surface of the cokes by the amount of 1-5% of the coke weight.
Description
(1) technical field
The present invention relates to a kind of blast furnace ironmaking with coke deactivator and using method thereof, belong to the ironmaking technology field.
(2) background technology
Coke is the important fuel of blast-furnace smelting, it plays thermal source in blast furnace, reductive agent, vital role such as carburizing agent and stock column skeleton, because blast furnace adopts the fuel injection technology, coke is as thermal source, the effect of reductive agent and carburizing agent is weakened gradually, development along with ironmaking technology, improving constantly of fine fodder level, the raising of wind-warm syndrome level, the realization of the big injection technology of oxygen enrichment, modern blast furnace are smelted and have been obtained further reinforcement, along with the reduction of coke ratio, the raising of combustion intensity, coke load increases (many iron and steel enterprises coke load reaches more than 4.5), and the residence time of coke in blast furnace prolongs, and molten loss rate increases, the coke quality deterioration, at this moment, coke effect as the stock column skeleton in stove seems more and more important, and associated coke strenth index also more and more is subjected to the worker's of smelting iron attention, intensity index after the thermal response of coke particularly, it more can accurately reflect the ability of coke anti-molten damage reaction in blast furnace, can reflect that more coke as the stock column skeleton, bears the ability size of load.In general, the coke that post-reaction strength is good, its shatter strength (M40) and wear resistance (M10) might as well.So many kinds are intended to improve the technical measures of coke thermal characteristics arises at the historic moment, as: improve high-quality coking coal (coking coal, rich coal) ratio, improve technology such as coal blending quality, tamping coking, moulded coal briquetting, coal damping and dry coke quenching.If increase the high-quality caking coal ratio, improve the coal blending quality, the purpose that improves coke strenth can be reached, but increasing considerably of process cost can be caused.If adopt technology such as tamping coking, moulded coal briquetting, coal damping and dry coke quenching, can increase a large amount of scrap build tasks undoubtedly, and one-time investment is very big, the construction period is long.
Chinese patent application number 02113708 has provided a kind of coke modifying process, with the mixture of titanium dioxide, boron oxide and boric acid or be configured to solution with boric acid separately, as the coke quenching water quenching, or spray to coke on the travelling belt before coke enters coke bin, improve the thermal characteristics of coke, because the cost of titanium dioxide, boron oxide is very high, make the properties-correcting agent cost up, the solution that is disposed can cause a large amount of properties-correcting agent wastes as the coke quenching water quenching, and the technology cost is raise.
(3) summary of the invention
Technical scheme of the present invention be seek a kind of cheap and can the instead of titanium white powder, the material of boron oxide, mix by different ratios with boric acid, be configured to solution after, transport in the process of blast furnace coke bin at coke, be sprayed on the coke surface, reach the purpose that improves the coke thermal characteristics equally.
The object of the present invention is achieved like this:
1, prepares passivator by weight percentage
Wherein, boric acid 70～90%, borax 0～10%, silicon-dioxide 5～30%, described boric acid refers to pure boric acid, if use industrial boric acid, can be converted to pure boric acid by its purity, and the fineness of described silicon-dioxide is below 500 orders, and purity is more than 98%.
2, concentration is prepared spray solution on request
Described passivator is put into fixed container, add water after (in order to improve solubleness, preferably to adding clear water heat), evenly stir, until complete mixing, be mixed with concentration (weight percent) and be 1～4% solution.
3, implement to spray
The transportation of coke from cool Jiao Tai to the blast-furnace coke storehouse, select suitable spray point (on belt head or the belt all can), with the solution for preparing by topping-up pump and special nozzle, even, the vaporific coke surface that is sprayed at.
The present invention is described in detail below in conjunction with embodiment.
Embodiment 1:
Take by weighing weight by the quality of pure substance and account for 90% boric acid, 5% borax and 5% silicon-dioxide uniform mixing, add water then, water temperature is controlled at 60-80 ℃, be mixed with the solution of 3.5% weight percent concentration by stirring, this solution is sprayed at coke surface by 2% straying quatity of weight of coke, carry out reactivity and post-reaction strength mensuration by standard GB/T4000-1996, gained result and check sample contrast the results are shown in following table:
Embodiment 2:
Take by weighing weight by the quality of pure substance and account for 80% boric acid, 5% borax and 10% silicon-dioxide uniform mixing, add water then, water temperature is controlled at 60-80 ℃, be mixed with the solution of 3.5% weight percent concentration by stirring, this solution is sprayed at coke surface by 2% straying quatity of weight of coke, carry out reactivity and post-reaction strength mensuration by standard GB/T4000-1996, gained result and check sample contrast the results are shown in following table:
Embodiment 3:
Take by weighing weight by the quality of pure substance and account for 70% boric acid, 10% borax and 20% silicon-dioxide uniform mixing, add water then, water temperature is controlled at 60-80 ℃, be mixed with the solution of 3.5% weight percent concentration by stirring, this solution is sprayed at coke surface by 2% straying quatity of weight of coke, carry out reactivity and post-reaction strength mensuration by standard GB/T4000-1996, gained result and check sample contrast the results are shown in following table:
Embodiment 4:
Take by weighing weight by the quality of pure substance and account for 90% boric acid, 10% silicon-dioxide uniform mixing, add water then, water temperature is controlled at 60-80 ℃, be mixed with the solution of 3.5% weight percent concentration by stirring, this solution is sprayed at coke surface by 2% straying quatity of weight of coke, carry out reactivity and post-reaction strength mensuration by standard GB/T4000-1996, gained result and check sample contrast the results are shown in following table:
Embodiment 5:
Take by weighing weight by the quality of pure substance and account for 80% boric acid, 20% silicon-dioxide uniform mixing, add water then, water temperature is controlled at 60-80 ℃, be mixed with the solution of 3.5% weight percent concentration by stirring, this solution is sprayed at coke surface by 2% straying quatity of weight of coke, carry out reactivity and post-reaction strength mensuration by standard GB/T4000-1996, gained result and check sample contrast the results are shown in following table:
Embodiment 6:
Take by weighing weight by the quality of pure substance and account for 70% boric acid, 30% silicon-dioxide uniform mixing, add water then, water temperature is controlled at 60-80 ℃, be mixed with the solution of 3.5% weight percent concentration by stirring, this solution is sprayed at coke surface by 2% straying quatity of weight of coke, carry out reactivity and post-reaction strength mensuration by standard GB/T4000-1996, gained result and check sample contrast the results are shown in following table:
Take by weighing weight by the quality of pure substance and account for 70% boric acid, 30% silicon-dioxide uniform mixing, add water then, water temperature is controlled at 60-80 ℃, be mixed with the solution of 3.5% weight percent concentration by stirring, this solution is sprayed at coke surface by 2% straying quatity of weight of coke, carry out reactivity and post-reaction strength mensuration by standard GB/T4000-1996, gained result and check sample contrast the results are shown in following table:
Claims (3)
1. coke deactivator is characterized in that the composition (weight percent) of described coke deactivator is: boric acid 70～90%, borax 0～10%, silicon-dioxide 5～30%, a material of described silicon-dioxide less than 500 orders, purity more than 98%.
2. the using method of coke deactivator as claimed in claim 1, it is characterized in that described coke deactivator adds is mixed with the aqueous solution that concentration is 1～4% (weight percent) after water stirs, and the described aqueous solution evenly is sprayed at coke surface by 1～5% straying quatity of weight of coke.
3. coke deactivator using method according to claim 2 is characterized in that the described aqueous solution evenly is sprayed at coke surface in the vaporific mode of flyover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510017909 CN1730628B (en) | 2005-08-15 | 2005-08-15 | Coke passivator and its usage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510017909 CN1730628B (en) | 2005-08-15 | 2005-08-15 | Coke passivator and its usage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1730628A CN1730628A (en) | 2006-02-08 |
| CN1730628B true CN1730628B (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510017909 Expired - Fee Related CN1730628B (en) | 2005-08-15 | 2005-08-15 | Coke passivator and its usage |
Country Status (1)
| Country | Link |
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| CN (1) | CN1730628B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050395B (en) * | 2007-04-26 | 2010-10-06 | 武汉钢铁(集团)公司 | Modifier for coke, method for producing the modifier, and application |
| CN101082008B (en) * | 2007-07-05 | 2010-09-08 | 武汉科技大学 | Coke deactivator containing lanthanide series rare-earth elements and and method of use thereof |
| CN101531939B (en) * | 2008-07-16 | 2012-07-04 | 郑州大学 | Coke deterioration inhibitor and preparation method thereof |
| 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 |
| CN101654634B (en) * | 2009-09-09 | 2013-07-10 | 重庆汉砧科技有限公司 | Coke passivating agent |
| 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 |
| 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 |
| 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 |
| CN102443403B (en) * | 2011-08-10 | 2014-02-12 | 徐州长龙能源科技有限公司 | Nitrogen-containing dosage form of environmentally-friendly water quenching coke strength enhancing agent |
| CN102433136B (en) * | 2011-08-10 | 2014-01-08 | 王长龙 | Enhanced environment-friendly type water-quenched coke strength reinforcing agent |
| 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 |
| CN103146408B (en) * | 2013-03-15 | 2014-12-17 | 重庆大学 | Mill coal composite pulverized coal modifier, modified coal prepared by using mill coal composite pulverized coal modifier, and preparation method of modified coal |
| CN104263906B (en) * | 2014-09-30 | 2016-04-27 | 江阴兴澄特种钢铁有限公司 | A kind of ironmaking crude fuel passivating method |
| CN104451005B (en) * | 2014-11-21 | 2017-03-15 | 河南高能能源有限公司 | Blast furnace coke special-purpose embrane method treatment fluid |
| 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 |
-
2005
- 2005-08-15 CN CN 200510017909 patent/CN1730628B/en not_active Expired - Fee Related
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| CN1730628A (en) | 2006-02-08 |
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