CN105132605A - Process for pressing slag and removing foam of converter slag tank by using blast furnace gas ash - Google Patents
Process for pressing slag and removing foam of converter slag tank by using blast furnace gas ash Download PDFInfo
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- CN105132605A CN105132605A CN201510551728.8A CN201510551728A CN105132605A CN 105132605 A CN105132605 A CN 105132605A CN 201510551728 A CN201510551728 A CN 201510551728A CN 105132605 A CN105132605 A CN 105132605A
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- slag
- converter
- gas ash
- pressing
- blast furnace
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a process for pressing slag and removing foam of a converter slag tank by using blast furnace gas ash. The process comprises the following steps: (1) carrying blister slag and gas ash generated by an iron-making plant to a production plant area; (2) adding the blister slag and the gas ash into a mixer according to a mass ratio of 65 to 35, stirring and mixing uniformly in a cyclic operation manner, feeding one ton of material for each time without requirement on the feeding order, stirring for 30 minutes after feeding for each time, in which the feeding time is controlled to be completed in 15 minutes and the pure stirring time is not less than 15 minutes; then discharging and producing a slag pressing agent; (3) carrying the uniformly-mixed raw materials to a slag pouring station of a converter steel-making plant for later use; and (4) manually adding 100kg of the slag pressing agent when the furnace slag in the converter slag tank is severely foamed so as to achieve the purposes of pressing slag and removing foam.
Description
Technical field
The present invention relates to the recycle of iron work waste, relate to a kind of blast furnace dust carries out pressing slag froth breaking technique for converter slag ladle.
Background technology
Bessemerize molten steel to terminal, converter is tumbled 75 ~ 90 ° to direction of slagging tap by needing of having, and pours out the slag of part, carry out the operation of thermometric sampling, also have the converter adopting sublance system, do not carry out thermometric sampling, directly after finishing blowing, the tapping of falling stove, and then to slag ladle deslagging.
Because converter is at blow end point, slag bubble level is serious, no matter any mode, when converter inclining deslagging, the slag that in stove, foamed is serious is poured out from fire door, pour in the slag ladle in slag car of converter, slag ladle poured into by this foamy slag, if do not taken measures, the slag that a small amount of foamed is serious will be full of whole slag ladle very soon, affect slag ladle splendid attire converter liquid steel slag, need to wait for that the bubble level of slag decays to certain degree, body of heater of can tumbling continues deslagging, or output the slag ladle that the slag car more renews, otherwise slag spilling slag ladle can burn out the slag car and cause the accident, these two kinds of methods all can increase the smelting cycle of converter, so also there is no a kind of effective means at present, solve liquid steel slag in slag ladle and overflow the technique of slag ladle.
In addition on the one hand, the bessemer furnace slag in steelmaking process, basicity is higher, causes the less stable of slag, needs the basicity rationally reducing bessemer furnace slag.In addition the gas ash of Iron Works is owing to being rich in the elements such as Zn, K, Na, C, is a kind of ironmaking waste being difficult to effectively to utilize.
Searching document discloses: (1) Gong Hongjun has the content of " adopting waste steel slag to press slag residue adjustment in conjunction with carbonaceous material " to state in the middle of " Sichuan is metallurgical " paper that the 31st volume the 1st phase delivered in 2009 " waste steel slag is used for practice and the analysis of the residue adjustment of a converter steelmaking pressure slag " literary composition.(2) Sun Guiping, Ma Zhiwei, Ren Jianbo are at " kownledge economy " magazine 2012(7) have in the middle of the paper delivered " application of pressure slag ball in a converter steelmaking " literary composition "; appropriate pressure slag ball is selected to fall to add before stove or tapping technique simple; effectively can suppress slag foamed phenomenon; reduce deslagging and damage iron; go out steel heat to low-carbon (LC) high (FeO), in slag, (FeO) reduces comparatively obvious.And make steel cycle time after using pressure slag ball, operating environment improves, and spattering the slag quantity of slag can meet.Promote the use of in other converters of our factory at present." content statement.(3) permitted to open, Dong Lianxing, Liu Shizhou be at " steel-making " 1993(1) paper " development of pressure slag rice husk block and commerical test " delivered has the content of " can eliminate foamy slag when pressure agent has at blow end point; can suppress or eliminate overflow slag, spray slag, expulsion events, ensure safety in production " to state.(4) Wang Weiping of Shoudu Iron and Steel Co Qian Gang company, Zhang Haibin discloses the paper being entitled as " Shoudu Iron and Steel Co moves steel blast furnace sinter with addition of solid waste practice summary " in the 13 national Large Scale BF smelts iron academic nd Annual Meeting collection, have in this article and " move the enrichment of steel blast furnace to zinc element, do not imitate control device, the enrichment of zinc element has buried the large hidden danger of root to severe stove direct motion and longevity, at present, can only control from source, reducing Zn content in raw material is reduce exhibition that zinc enters stove directly and the most effectively connect footpath, the zinc of sintering zone eight accounts for 665% of whole Zn load, and the circulation collection of zinc element in solid waste is the basic reason causing zinc enrichment in blast furnace.Engineering department is according to alkali-metal balance, and formulate perfect in standard, ratio is not more than 2%.”
According to above document, also the technique precedent of pressing slag froth breaking is not carried out for slag in converter slag ladle at present, and the gas ash of blast furnace do not have a kind of effective Land use systems yet.
Summary of the invention
A kind of blast furnace dust is the object of the present invention is to provide to carry out pressing the technique of slag froth breaking for converter slag ladle, by the functional materials of the gas ash adding portion of iron work, preparation becomes pressure agent, add in converter slag ladle and froth breaking pressure slag is carried out for the foamy slag in slag ladle, both the process time of changing slag ladle had been saved, creating condition for saving the converter smelting time, optimizing again the performance of bessemer furnace slag.
The object of the present invention is achieved like this, and a kind of blast furnace dust is used for the technique that converter slag ladle carries out pressing slag froth breaking, 1) the bubble slag produced by iron work and gas ash roping are to production plant area; 2) by above bi-material according to blast furnace bubble slag: gas ash mass percent is that the ratio of 65:35 adds mixing machine, the mode of cycle operation is adopted to carry out stirring and evenly mixing, feed intake 1 ton at every turn, the order fed intake not requirement, stir 30min after feeding intake at every turn, wherein feed time controls to complete within 15min, and pure churning time is not less than 15min, and then pressure agent is made in discharging; 3) above blend feedstock roping is stand-by to BOF steelmaking shop deslagging station; 4), when in converter slag ladle, slag foamed is serious, the pressure agent that hand adds into 100kg can reach the object of pressing slag froth breaking.
The present invention have studied the one-tenth bubble mechanism of foamy slag, and namely foamy slag is formed, and slag must have suitable viscosity, each bubble must depend on one and become alveolar substance point, the gas that there is a need to, leaves any one condition, and bubble will break, the foamed phenomenon of foamy slag will be inhibited.
So the bubble slag that contriver adopts ironmaking system to produce, the blast furnace dust of adding portion, after foamy slag poured into by converter slag ladle, the basicity of bubble slag is lower, the slag film viscosity of converter foamy slag can be reduced, the blast furnace dust carbon wherein added, react with the FeO in bessemer furnace slag, produce CO bubble, add the bubble in foamy slag, the bubble in slag can be merged, add the dividing potential drop of gas in foamy slag, dividing potential drop is caused to increase, gas can break through the effusion of slag film, the bubble chamber film in slag is caused to break, play the effect of froth breaking, after iron simultaneously in the middle of gas ash is reduced, be deposited at the bottom of the tank of slag ladle, be recovered at the process procedure of Slag treatment.The gas ash of the bubble slag of iron work and blast furnace mixes by the present invention, make the pressure agent becoming slag ladle, add to the moment of deslagging in slag ladle in the technological process of converter smelting, component in pressure agent is reacted with the slag in slag ladle in physics and chemistry two kinds of modes simultaneously, plays the object of froth breaking pressure slag.
The slag basicity of converter is high, and in slag, the viscosity of slag film is higher, and above pressure agent raw material adds after in converter slag, under the temperature condition of converter slag ladle, the C in pressure agent be first heated with slag in the middle of FeO react, the CO/CO of generation
2while bubble effusion, merge the bubble in converter foamy slag, add the dividing potential drop of gas in bubble, play the object increasing broken bubble pressure, the reduction of FeO content in the middle of slag, in foamy slag, the slag film viscosity of small bubbles one by one increases, easily break, play the object of chemical froth breaking pressure slag.The principal reaction occurred is as follows:
C+CaO·Fe
2O
3+SiO
2→CO
2↑+Fe+2CaO·SiO
2（1）
FeO+C→Fe+CO↑（2）
3CaO·SiO
2+SiO
2→2CaO·SiO
2（3）
Wherein react the calcium ferrite that (1) is low melting point to generate dystectic Dicalcium Phosphate (Feed Grade), play the effect increasing slag film viscosity; Reaction (2) is the principal reaction increasing broken bubble source of the gas; Reaction (3) is the principal reaction reducing bessemer furnace slag basicity.
In addition the iron compound in the middle of pressure agent, after adding slag ladle, plays the effect of the slag temperature reducing slag, is conducive to the froth breaking operation of slag.
Technique effect of the present invention: 1) solve converter steelmaking in slag ladle during deslagging slag foamed have a strong impact on the process difficulties of deslagging operation.2) pressure agent that this technical matters is produced can reduce the basicity of bessemer furnace slag while playing froth breaking, and the stabilization for slag utilizes and creates condition.3) make use of the carbonaceous component in the middle of gas ash, make it at the ferric oxide of high-temperature liquid furnace slag intermediary reduction bessemer furnace slag centre, make it to become metallic iron, the magnetic separation being conducive to iron compound in residues processing technique link is reclaimed, and what can solve a part of blast furnace dust utilizes a difficult problem.The bubble slag in ironworks and the gas ash of blast furnace are that main raw material makes and becomes pressure agent by the present invention, and use in converter steelmaking process, recycle the smelting technology with converter for what optimize steelworks solid waste rubbish, effect is extremely remarkable.
Embodiment
The present invention is described further in conjunction with the embodiments.
Embodiment
For 1 120 tons of converter lines; This line configuration has engineered capacity to be the converter 3 of 120 tons, uses 11m
3slag ladle splendid attire converter liquid steel slag.
1) by iron work produce bubble slag and gas ash roping stand-by to production plant area;
2) by above bi-material, blast furnace bubble slag: gas ash is that the ratio of mass percent 65:35 adds " VI type pressure type stirs serial mixer " of being produced by Jiangxi Ren Feng mechanical means company limited, the mode of operation of cycle operation formula is adopted to carry out stirring and evenly mixing, feed intake 1 ton at every turn, the order fed intake not requirement, stirs 30min after feeding intake at every turn, and wherein feed time controls to complete within 15min, pure churning time is not less than 15min, and then pressure agent is made in discharging;
3) above blend feedstock roping is stand-by to BOF steelmaking shop deslagging station;
4), during converter deslagging, when in slag ladle, slag foamed is serious, the pressure agent that hand adds into 100kg can reach the object of pressing slag froth breaking.
Beneficial effect of the present invention: 1) can reduce the time changing slag ladle in converter deslagging process, shortens smelting cycle, improves the production capacity of converter.2) ironmaking slag is utilized to reduce the basicity of converter slag, for the stabilization application of converter slag creates condition.3) effectively make use of the effective constituent in the middle of gas ash, make it value maximization.
Claims (1)
1. blast furnace dust is used for the technique that converter slag ladle carries out pressing slag froth breaking, it is characterized in that 1) the bubble slag that produced by iron work and gas ash roping be to production plant area; 2) by above bi-material according to blast furnace bubble slag: gas ash mass percent is that the ratio of 65:35 adds mixing machine, the mode of cycle operation is adopted to carry out stirring and evenly mixing, feed intake 1 ton at every turn, the order fed intake not requirement, stir 30min after feeding intake at every turn, wherein feed time controls to complete within 15min, and pure churning time is not less than 15min, and then pressure agent is made in discharging; 3) above blend feedstock roping is stand-by to BOF steelmaking shop deslagging station; 4), when in converter slag ladle, slag foamed is serious, the pressure agent that hand adds into 100kg can reach the object of pressing slag froth breaking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510551728.8A CN105132605A (en) | 2015-09-02 | 2015-09-02 | Process for pressing slag and removing foam of converter slag tank by using blast furnace gas ash |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510551728.8A CN105132605A (en) | 2015-09-02 | 2015-09-02 | Process for pressing slag and removing foam of converter slag tank by using blast furnace gas ash |
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| Publication Number | Publication Date |
|---|---|
| CN105132605A true CN105132605A (en) | 2015-12-09 |
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| CN201510551728.8A Pending CN105132605A (en) | 2015-09-02 | 2015-09-02 | Process for pressing slag and removing foam of converter slag tank by using blast furnace gas ash |
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|---|---|
| CN (1) | CN105132605A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107641711A (en) * | 2017-11-20 | 2018-01-30 | 宝钢集团新疆八钢铁有限公司 | Utilize steel rolling oily sludge and the method for blast furnace dust production revolving furnace slag pressing agent |
| CN110139938A (en) * | 2017-02-08 | 2019-08-16 | 日本制铁株式会社 | Inhibit the method for slag bloating |
| CN111440918A (en) * | 2020-04-07 | 2020-07-24 | 包头钢铁（集团）有限责任公司 | Method for defoaming dephosphorization residues by utilizing recycled resources |
| CN114717376A (en) * | 2022-05-13 | 2022-07-08 | 山东钢铁集团永锋临港有限公司 | Method for improving slag pressing effect |
| CN115716738A (en) * | 2022-12-09 | 2023-02-28 | 新源县渣宝环保技术有限公司 | Production process of high-strength steel slag brick |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5340614A (en) * | 1976-09-28 | 1978-04-13 | Nisshin Steel Co Ltd | Killing agent used to suppress bubbling of slag and operating method of converter using it |
| JPH09217107A (en) * | 1996-02-14 | 1997-08-19 | Nkk Corp | Killing agent for foaming slag |
| CN102016081A (en) * | 2008-05-27 | 2011-04-13 | 新日本制铁株式会社 | Slag foaming killing material, and slag foaming killing method |
| CN103484595A (en) * | 2013-09-17 | 2014-01-01 | 新疆中合大正商贸有限公司 | Production process of magnesian slag pressing agents |
| CN104531938A (en) * | 2014-12-19 | 2015-04-22 | 新疆八一钢铁股份有限公司 | Method for applying slag pressing agent produced by blast furnace gun mud to converter steelmaking |
-
2015
- 2015-09-02 CN CN201510551728.8A patent/CN105132605A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5340614A (en) * | 1976-09-28 | 1978-04-13 | Nisshin Steel Co Ltd | Killing agent used to suppress bubbling of slag and operating method of converter using it |
| JPH09217107A (en) * | 1996-02-14 | 1997-08-19 | Nkk Corp | Killing agent for foaming slag |
| CN102016081A (en) * | 2008-05-27 | 2011-04-13 | 新日本制铁株式会社 | Slag foaming killing material, and slag foaming killing method |
| CN103484595A (en) * | 2013-09-17 | 2014-01-01 | 新疆中合大正商贸有限公司 | Production process of magnesian slag pressing agents |
| CN104531938A (en) * | 2014-12-19 | 2015-04-22 | 新疆八一钢铁股份有限公司 | Method for applying slag pressing agent produced by blast furnace gun mud to converter steelmaking |
Non-Patent Citations (1)
| Title |
|---|
| 张雪玲 等: "八钢工业固体废弃物利用现状及发展对策", 《新疆钢铁》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110139938A (en) * | 2017-02-08 | 2019-08-16 | 日本制铁株式会社 | Inhibit the method for slag bloating |
| CN107641711A (en) * | 2017-11-20 | 2018-01-30 | 宝钢集团新疆八钢铁有限公司 | Utilize steel rolling oily sludge and the method for blast furnace dust production revolving furnace slag pressing agent |
| CN111440918A (en) * | 2020-04-07 | 2020-07-24 | 包头钢铁（集团）有限责任公司 | Method for defoaming dephosphorization residues by utilizing recycled resources |
| CN114717376A (en) * | 2022-05-13 | 2022-07-08 | 山东钢铁集团永锋临港有限公司 | Method for improving slag pressing effect |
| CN115716738A (en) * | 2022-12-09 | 2023-02-28 | 新源县渣宝环保技术有限公司 | Production process of high-strength steel slag brick |
| CN115716738B (en) * | 2022-12-09 | 2023-11-10 | 新源县渣宝环保技术有限公司 | Production process of high-strength steel slag brick |
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Application publication date: 20151209 |