CN103464713A - Method for improving automatic casting ratio and stuffing sand thereof - Google Patents
Method for improving automatic casting ratio and stuffing sand thereof Download PDFInfo
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- CN103464713A CN103464713A CN2013104102090A CN201310410209A CN103464713A CN 103464713 A CN103464713 A CN 103464713A CN 2013104102090 A CN2013104102090 A CN 2013104102090A CN 201310410209 A CN201310410209 A CN 201310410209A CN 103464713 A CN103464713 A CN 103464713A
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Abstract
The invention relates to a method for improving an automatic casting ratio and stuffing sand thereof and belongs to the technical field of iron and steel smelting. The method for improving the automatic casting ratio mainly comprises the steps of 1) cleaning a water nozzle, 2) adding the stuffing sand into the water nozzle to a specified amount, 3) pouring molten steel and sintering the surface layer of the stuffing sand; 4) removing a plug of the water nozzle when the molten steel reaches a preset amount and starting pouring. The stuffing sand is mainly composed of calcium-silicon alloy powder, chromium sesquioxide, silicon dioxide and carbon black. The method for improving the automatic casting ratio and the stuffing sand can basically eliminate dispersed flow of casting and reduce secondary oxygen combustion of the water nozzle, and the success rate of automatic casting is equal to or more than 99%.
Description
Technical field
The present invention relates to a kind of method that improves automatic casting ratio, also relate to the necessary stuffing sand of the method, belong to the smelting iron and steel technical field.
Background technology
Stuffing sand is as ladle bottom mouth of a river packing material, on the one hand requirement can be at lower temperature sintering, the stuffing sand floating causes the accident when avoiding adding molten steel, require on the other hand to meet the steel face can not sintering blocked up under high temperature and long-time refined states, otherwise affect automatic casting ratio, thereby affect normal smelting operation.At present, it is domestic that what generally use is chromium matter, the stuffing sand such as siliceous or magnesia, siliceous stuffing sand be take quartz sand as base-material, be equipped with the feldspar eutectic as the acceleration of sintering agent, but the silica in quartz sand can reduce the basicity of tundish covering flux and corrode alkaline cylinder-packing, bring adverse influence to tundish alkalescence metallurgy environment; It is primary raw material that magnesia stuffing sand be take forsterite and magnesia, becomes alkalescent, be conducive to the formation of tundish alkaline environment, but its sintering character is restive; Chromium matter stuffing sand drainage effect is good, but sinter layer is unstable, steel easily occurs oozing, when molten steel is penetrated in stuffing sand, just forms the steel sand mixed layer, is difficult to realize from opening, and serious even can't be boiled with oxygen lance, causes the disconnected accident of watering; In addition, no matter be siliceous stuffing sand or magnesia stuffing sand, it is low to the continuous casting ladle automatic free-opening rate, is generally 85～90%, is difficult to meet the needs of auto-guiding under high temperature or long-time refining condition.
The Chinese patent that application number is 201210259273.9 " Cr-Al material ladle draining sand " discloses a kind of stuffing sand, it consists of: the chrome ore that comprises 60～70 parts, the high aluminium ore of 10～20 parts, 10～20 Desert Sand and 10～20 parts of properties modifiers, the defect that this technical scheme still exists above-mentioned chromium matter stuffing sand to exist.
Summary of the invention
Technical problem to be solved by this invention is, a kind of stuffing sand that contains the calcium-silicon powder is provided, and this stuffing sand utilizes the characteristic of calcium-silicon substantially to stop to open and waters the diffusing phenomenon, improve the automatic casting success rate.
The present invention solves the technical scheme of above technical problem:
A kind of method that improves automatic casting ratio, carry out as follows: 1) cleaning process, first tundish is completed to roasting procedure, then foreign material remaining in middle water containing opening are cleaned out; 2) section that wraps from centre adds stuffing sand water inlet, guarantees that the mouth of a river evenly fills up stuffing sand from bottom to the wrist oral area; 3), by molten steel impouring tundish, now the surface of stuffing sand is condensed by high temperature and is played agglomeration; 4) adopt the way judgement liquid level of manual measurement, use rod iron vertically to insert in tundish, the length of extracting rear steel bonding is molten steel face height, when highly reaching 300mm, take away the mouth of a river, below plug, now the sinter layer of stuffing sand breaks because of the extruding of upper steel hydrostatic pressure, and molten steel flows out from the mouth of a river and starts cast.
A kind of stuffing sand, comprise the calcium-silicon powder, and the chemical composition of calcium-silicon powder comprises by weight percentage: calcium-silicon 20～30%, chrome green 20～30%, silica 30～40%, carbon black 2～3%; Wherein the main component of calcium-silicon comprises Si >=60%, Ca >=28%, and all the other are Fe.
Calcium-silicon, a kind of bianry alloy be comprised of silicon and calcium, belong to the ferroalloy category, its principal component is silicon and calcium, the iron that also contains varying number, aluminium, carbon, the impurity such as sulphur and phosphorus, steel and iron industry is as calcium additive, deoxidier, the denaturant of desulfurizing agent and non-metallic inclusion, cast iron industry is as inovulant and denaturant, calcium-silicon is met high temperature can produce strong exothermic effect, instantaneous raising environment temperature, the present invention utilizes these characteristics of calcium-silicon, be added into again a part of non-metallic material component and form a kind of brand-new stuffing sand, this stuffing sand has not only been guaranteed sintering character, and by instantaneous a large amount of exothermic reactions, stop the mouth of a river and tied cold steel phenomenon.
The technical scheme that the present invention further limits is:
Further, the calcium-silicon Powder Particle Size requires 0-1mm.
Further, stuffing sand is middle bag stuffing sand.
Further, the chemical composition of calcium-silicon powder comprises by weight percentage: calcium-silicon 20%, chrome green 20%, silica 30%, carbon black 2%; Wherein the main component of calcium-silicon comprises Si60%, Ca28%, and all the other are Fe, described calcium-silicon Powder Particle Size requires 0.1mm.
Further, the chemical composition of calcium-silicon powder comprises by weight percentage: calcium-silicon 30%, chrome green 30%, silica 40%, carbon black 3%; Wherein the main component of calcium-silicon comprises Si62%, Ca30%, and all the other are Fe, described calcium-silicon Powder Particle Size requires 1mm.
Further, the chemical composition of calcium-silicon powder comprises by weight percentage: calcium-silicon 25%, chrome green 25%, silica 35%, carbon black 2.5%; Wherein the main component of calcium-silicon comprises Si61%, Ca29%, and all the other are Fe, described calcium-silicon Powder Particle Size requires 0.5mm.
In a word, the present invention adopts the calcium-silicon stuffing sand to possess following features: 1) can be at lower temperature sintering, while having avoided adding molten steel, the stuffing sand floating causes the accident; 2) meet molten steel face sintering under high temperature and long-time smelting state not thick, can reach automatic casting, automatic casting ratio >=99%, enhance productivity, and reduces molten steel and pollute, and reduces flue gas consumption, improves the production safety coefficient.
The specific embodiment
embodiment
A kind of middle bag stuffing sand that contains the calcium-silicon powder that the present embodiment provides, comprise the calcium-silicon powder, the chemical composition of calcium-silicon powder comprises by weight percentage: calcium-silicon 20～30%, chrome green 20～30%, silica 30～40%, carbon black 2～3%; Wherein the main component of calcium-silicon comprises Si >=60%, Ca >=28%, and all the other are Fe, the calcium-silicon Powder Particle Size requires 0-1mm;
The actual chemical composition of stuffing sand of the present invention is as shown in table 1:
The chemical composition (wt%) of each embodiment of calcium-silicon powder in table 1 the present invention:
The actual chemical composition of calcium-silicon of the present invention is as shown in table 2:
The chemical composition of each embodiment of calcium-silicon (wt%) in table 2 the present invention:
；
A kind of method that improves automatic casting ratio, carry out as follows: 1) cleaning process, first tundish is completed to roasting procedure, then foreign material remaining in middle water containing opening are cleaned out; 2) section that wraps from centre adds stuffing sand water inlet, guarantees that the mouth of a river evenly fills up stuffing sand from bottom to the wrist oral area; 3), by molten steel impouring tundish, now the surface of stuffing sand is condensed by high temperature and is played agglomeration; 4) adopt the way judgement liquid level of manual measurement, use rod iron vertically to insert in tundish, the length of extracting rear steel bonding is molten steel face height, when highly reaching 300mm, take away the mouth of a river, below plug, now the sinter layer of stuffing sand breaks because of the extruding of upper steel hydrostatic pressure, and molten steel flows out from the mouth of a river and starts cast.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (7)
1. a method that improves automatic casting ratio is characterized in that: carry out as follows: 1) cleaning process, first tundish is completed to roasting procedure, and then foreign material remaining in middle water containing opening are cleaned out; 2) section that wraps from centre adds stuffing sand water inlet, guarantees that the mouth of a river evenly fills up stuffing sand from bottom to the wrist oral area; 3), by molten steel impouring tundish, now the surface of stuffing sand is condensed by high temperature and is played agglomeration; 4) adopt the way judgement liquid level of manual measurement, use rod iron vertically to insert in tundish, the length of extracting rear steel bonding is molten steel face height, when highly reaching 300mm, take away the mouth of a river, below plug, now the sinter layer of stuffing sand breaks because of the extruding of upper steel hydrostatic pressure, and molten steel flows out from the mouth of a river and starts cast.
2. a stuffing sand, it is characterized in that: described stuffing sand comprises the calcium-silicon powder, the chemical composition of described calcium-silicon powder comprises by weight percentage: calcium-silicon 20～30%, chrome green 20～30%, silica 30～40%, carbon black 2～3%; Wherein the main component of calcium-silicon comprises Si >=60%, Ca >=28%, and all the other are Fe.
3. stuffing sand as claimed in claim 2, is characterized in that: described calcium-silicon Powder Particle Size requirement 0-1mm.
4. stuffing sand as claimed in claim 2 or claim 3, it is characterized in that: described stuffing sand is middle bag stuffing sand.
5. stuffing sand as claimed in claim 3, it is characterized in that: the chemical composition of described calcium-silicon powder comprises by weight percentage: calcium-silicon 20%, chrome green 20%, silica 30%, carbon black 2%; Wherein the main component of calcium-silicon comprises Si60%, Ca28%, and all the other are Fe, described calcium-silicon Powder Particle Size requires 0.1mm.
6. stuffing sand as claimed in claim 3, it is characterized in that: the chemical composition of described calcium-silicon powder comprises by weight percentage: calcium-silicon 30%, chrome green 30%, silica 40%, carbon black 3%; Wherein the main component of calcium-silicon comprises Si62%, Ca30%, and all the other are Fe, described calcium-silicon Powder Particle Size requires 1mm.
7. stuffing sand as claimed in claim 3, it is characterized in that: the chemical composition of described calcium-silicon powder comprises by weight percentage: calcium-silicon 25%, chrome green 25%, silica 35%, carbon black 2.5%; Wherein the main component of calcium-silicon comprises Si61%, Ca29%, and all the other are Fe, described calcium-silicon Powder Particle Size requires 0.5mm.
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| CN201310410209.0A CN103464713B (en) | 2013-09-11 | 2013-09-11 | A kind of method and stuffing sand thereof improving automatic casting ratio |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104338926A (en) * | 2014-10-24 | 2015-02-11 | 南京钢铁股份有限公司 | Method for increasing self-pouring rate of ladle and purity degree of molten steel |
| CN108620547A (en) * | 2018-04-19 | 2018-10-09 | 芜湖新兴铸管有限责任公司 | Continuous casting opens the method poured |
| CN114213111A (en) * | 2021-12-30 | 2022-03-22 | 鞍山市和丰耐火材料有限公司 | Aluminum-carbon soaking water inlet for accidents and preparation method |
| CN114247877A (en) * | 2021-12-03 | 2022-03-29 | 山东莱钢永锋钢铁有限公司 | Device and method for casting of square billet continuous casting tundish |
| CN114273649A (en) * | 2021-12-31 | 2022-04-05 | 北京瑞普同创科技发展有限公司 | Casting process of sizing quick-change tundish |
| CN114453577A (en) * | 2022-01-25 | 2022-05-10 | 北京瑞普同创科技发展有限公司 | Sizing quick-change tundish drainage rod and casting process thereof |
| CN114918409A (en) * | 2022-05-19 | 2022-08-19 | 首钢京唐钢铁联合有限责任公司 | Method for adding ladle drainage sand |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10137924A (en) * | 1996-11-01 | 1998-05-26 | Toshiba Ceramics Co Ltd | Falling material for immediately opening sliding nozzle hole |
| CN1382546A (en) * | 2002-03-05 | 2002-12-04 | 吴登来 | Draining ageng made of chromium |
| CN1978093A (en) * | 2005-11-29 | 2007-06-13 | 宝山钢铁股份有限公司 | Tundish metallurgy method of increasing molten steel purity |
| CN200963676Y (en) * | 2006-06-27 | 2007-10-24 | 宝山钢铁股份有限公司 | Automatic casting piston for ladle |
-
2013
- 2013-09-11 CN CN201310410209.0A patent/CN103464713B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10137924A (en) * | 1996-11-01 | 1998-05-26 | Toshiba Ceramics Co Ltd | Falling material for immediately opening sliding nozzle hole |
| CN1382546A (en) * | 2002-03-05 | 2002-12-04 | 吴登来 | Draining ageng made of chromium |
| CN1978093A (en) * | 2005-11-29 | 2007-06-13 | 宝山钢铁股份有限公司 | Tundish metallurgy method of increasing molten steel purity |
| CN200963676Y (en) * | 2006-06-27 | 2007-10-24 | 宝山钢铁股份有限公司 | Automatic casting piston for ladle |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104338926A (en) * | 2014-10-24 | 2015-02-11 | 南京钢铁股份有限公司 | Method for increasing self-pouring rate of ladle and purity degree of molten steel |
| CN104338926B (en) * | 2014-10-24 | 2016-06-29 | 南京钢铁股份有限公司 | A kind of ladle that improves is from watering rate and the method for molten steel degree of purity |
| CN108620547A (en) * | 2018-04-19 | 2018-10-09 | 芜湖新兴铸管有限责任公司 | Continuous casting opens the method poured |
| CN114247877A (en) * | 2021-12-03 | 2022-03-29 | 山东莱钢永锋钢铁有限公司 | Device and method for casting of square billet continuous casting tundish |
| CN114213111A (en) * | 2021-12-30 | 2022-03-22 | 鞍山市和丰耐火材料有限公司 | Aluminum-carbon soaking water inlet for accidents and preparation method |
| CN114213111B (en) * | 2021-12-30 | 2023-08-11 | 鞍山市和丰耐火材料有限公司 | Aluminum-carbon immersion nozzle for accidents and preparation method |
| CN114273649A (en) * | 2021-12-31 | 2022-04-05 | 北京瑞普同创科技发展有限公司 | Casting process of sizing quick-change tundish |
| CN114273649B (en) * | 2021-12-31 | 2023-06-02 | 北京瑞普同创科技发展有限公司 | Casting technology of sizing quick-change tundish |
| CN114453577A (en) * | 2022-01-25 | 2022-05-10 | 北京瑞普同创科技发展有限公司 | Sizing quick-change tundish drainage rod and casting process thereof |
| CN114453577B (en) * | 2022-01-25 | 2024-02-13 | 何霞 | Sizing quick-change tundish drainage rod and drainage rod casting process |
| CN114918409A (en) * | 2022-05-19 | 2022-08-19 | 首钢京唐钢铁联合有限责任公司 | Method for adding ladle drainage sand |
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| CN103464713B (en) | 2016-01-20 |
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