CN1509827A - Alkali inducing sand for ladle and production thereof - Google Patents
Alkali inducing sand for ladle and production thereof Download PDFInfo
- Publication number
- CN1509827A CN1509827A CNA021585709A CN02158570A CN1509827A CN 1509827 A CN1509827 A CN 1509827A CN A021585709 A CNA021585709 A CN A021585709A CN 02158570 A CN02158570 A CN 02158570A CN 1509827 A CN1509827 A CN 1509827A
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- sand
- flow guiding
- moisture
- steel ladle
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Abstract
An alkaline draining sand used for pouring molten steel from ladle contains the calcined forsterite sand, quartz sand, magnesium sand, feldspar and graphite, which have necessary granularities. Its advantages are smooth pouring, and no pollution to molten steel.
Description
Technical field
The present invention relates to a kind of drainage sand that industry uses and preparation method thereof of making steel when steel ladle is watered steel; especially under the sequence casting condition; smelt special kinds steel and the needed alkaline environment of clean steel; should reach ladle nozzle smoothly from watering; stabilizing continuous casting machine operation technology improves the rate of even watering, and realizes the full guard cast; guarantee that again it can not pollute molten steel, promote to be formed with to be beneficial to and remove the alkali condition that is mingled with in the absorption steel.
Technical background
By the domestic and international in recent years ladle drainage sand operating position of investigation, generally the drainage agent base-material of Cai Yonging is a quartz sand, SiO
2Content is more than 93%, and the additive of control sintering velocity is mainly low melting point basic species R is provided
2O (K
2O+Na
2O), feldspar, coke grain, carbon black.The drainage sand base-material that has only minority electric furnace steel mill to use when producing special steel is a chrome ore, though can realize that ladle nozzle is opened smoothly and water, help forming alkaline environment, it costs an arm and a leg, be acid quartziferous drainage sand 3.5-20 doubly, be difficult to adapt to extensive STEELMAKING PRODUCTION cost requirement.
Along with development of modern science and technology, more and more higher to the requirement of steel quality, the notion of clean steel (Cleansteel) is arisen at the historic moment, and becomes that iron and steel circle falls over each other to study and the target control of production, meeting the market requirement.The culvert meaning of clean steel should comprise following five aspects: impurity content is low in (1) steel; (2) field trash in the steel is tiny; (3) field trash in the steel is evenly distributed; (4) accidental large inclusions does not appear; (5) field trash character is divided into four classes according to field trash in the steel grade: (1) category-A: sulfide; (2) category-B: AL
2O
3Class; (3) C class: silicates, (4) D class: calcium-aluminate class.Representative steel grade mainly contains: bearing steel, pinion steel, spring steel, pipe line steel (seamless steel pipe and welded tube) thin plate (mainly being automotive sheet LF steel), rigid line, tire cord etc.The field trash of the Aluminosilicates in the steel is then closely related with selecting for use of refractory material.
Ladle is the process that molten steel very easily pollutes to tundish, selects suitable drainage sand for use, makes the complete automatic casting of ladle nozzle, then realizes tight protection casting, stops basically because molten steel contacts the secondary oxidation that causes with air; Select suitable drainage sand for use, reduce nonmetallic inclusion to greatest extent, avoid because of its acid pollution molten steel and destroy the tundish metallurgy effect.
With the tundish metallurgy technical development, generally adopt calcareous, magnesia material spray paint of magnesium or dry type material lining technique at present, and be equipped with high basicity coverture, form alkaline environment, form C with field trash in the molten steel
2S, C
3S, M
2S etc. reach and remove the purpose that absorption is mingled with.And adopt acid quartzy drainage sand, and adjust with the tundish of 50 tons of capacity, when even watering 10 stove molten steel, the quartziferous drainage sand of bringing tundish into then reaches 600-800Kg, with SiO in the quartziferous drainage sand
2Content calculates 93%, brings the SiO of tundish into
2Amount can reach 558-744Kg, both brings a large amount of Si matter to be mingled with to molten steel, and the alkaline environment of the tundish that neutralized again quickens the erosion of cylinder-packing slag lining, and then destroyed the tundish metallurgy effect.
Summary of the invention
As purpose of the present invention, when can make the ladle nozzle automatic casting exactly, create favorable conditions for being mingled with required alkaline environment in the tundish removal absorption steel.
Alkaline flow guiding sand used in steel ladle provided by the present invention and prepare comprises calcined magnesium olivine sand, quartz sand, magnesia, chrome ore, feldspar and the graphite made from extra care each grain composition, and its alkali metal compound content is greater than the nonmetallic compound sum.
Wherein the parts by weight proportioning of refining calcined magnesium olivine sand is 55-70%; MgO content in the calcined magnesium olivine sand between 38-55%, SiO
2Content is between 30-50%, and moisture is less than 0.5%; The granularity of wherein said refining calcined magnesium olivine sand comprises following several: 0.5-3.0mm, 1.0-3.0mm, 0.5-2.0mm, 0.5-2.5mm.
Wherein the parts by weight proportioning of refining magnesia is 5-10%; MgO content in the magnesia is between 65-85%, and moisture is less than 0.5%; The granularity of wherein said magnesia comprises following several: 0.5-3.0mm, 1.0-3.0mm, 0.5-2.0mm, 0.5-2.5mm.
Wherein the parts by weight proportioning of refining quartz sand is 5-15%; SiO in the quartz sand
2Content is between 80-93%, and moisture is less than 0.5%; The granularity of wherein said quartz sand comprises following several: 0.5-3.0mm, 1.0-3.0mm, 0.5-2.0mm, 0.5-2.5mm.
Wherein the parts by weight proportioning of refining chrome ore is 3-15%; Cr in the chrome ore
2O
3Content should be between 40-55%, and moisture is less than 0.5%; The granularity of wherein said chrome ore comprises following several: 0.5-3.0mm, 1.0-3.0mm, 0.5-2.0mm, 0.5-2.5mm.
The parts by weight proportioning of its andesine is 3-8%; The chemical analysis of feldspar is: SiO
2: 40-60%, AL
2O
3: 10-30%, CaO:10-25%, K
2O:16%, Na
2O:10%, moisture is less than 0.5%.The granularity of wherein said feldspar comprises following several: 0.5-3.0mm, 1.0-3.0mm, 0.5-2.0mm, 0.5-2.5mm.
Wherein the parts by weight proportioning of graphite is 0.2-1%; Graphitic carbon content is the graphite fine powder greater than 65%, and moisture is less than 0.5%.
The preparation side of alkaline flow guiding sand used in steel ladle is: described refining calcined magnesium olivine sand, quartz sand, magnesia, chrome ore, feldspar and graphite are carried out fragmentation, processing, screening obtain described various grade, add successively in the blender by described weight proportion, stir and get.
Find in the work: want to improve drainage agent quality, improve, must understand fully the factor that drainage agent influence is watered certainly, could tackle key problems with a definite target in view from watering rate.By analysis, guarantee that from watering, the drainage agent must possess following combination property: natural good fluidity, little, the anti-molten steel penetrating power of thermal coefficient of expansion is strong, sinter layer thin, soft heat bed thickness etc.The drainage agent possesses above several combination property, and after steel ladle sliding water gap was opened, sinter layer was broken by the molten steel extruding at once, and the drainage filler in filling pipe end and the brick cup just can fall into tundish naturally, forms free perforate, promptly forms from watering.
Through to several basic materials test contrasts, determine at last to use with high-quality calcined magnesium olivine (2MgO.SiO
2) more satisfactory as base-material.Because forsterite than great, fusing point is high, can reach 1890 ℃, does not have crystal formation and change from normal temperature to the fusing point, crystalchecked is the more satisfactory primary raw material of drainage agent opposing molten steel infiltration.
If sinter layer is blocked up, really up to the mark, when steel ladle sliding water gap was opened, the drainage agent can not be broken through under the ferrostatic pressure effect, does not reach the effect of nature drainage.This just needs control sinter layer thickness rationally, and is thin for reaching sinter layer, mainly from two aspect contrast tests:
1. adding additive.For better control agglutinating property, added a certain amount of magnesia and chrome ore, it adds can control burning sinter layer thickness; Added a certain amount of quartz sand and reduced sintering strength, but needed its amount of control, to prevent molten steel infiltration, filler come-up; Add a certain amount of graphite as lubricant, increase its flowability.Simultaneously, because of the forsterite coefficient of expansion is little, help from watering.
2. granular size grating.Feedstock particle size has a direct impact the caking power of drainage agent, and fine grained is greater than coarse grained influence, so grain composition is wanted accurately rationally, middle particle is big with the coarse granule ratio, and bulk density is good like this, flows easily.Thereby, make its sintering character poor, so that form thin sinter layer.
Drainage agent soft heat layer appropriateness helps molten steel and breaks through from opening.So, when selecting reasonable grain composition for use, the soft heat layer is increased for reaching the alkaline flow guiding agent, add a certain amount of alkalinity additive, thereby guaranteed the soft heat layer thickness, help molten steel and break through from opening.
The drainage filler after chemical analysis and ore deposit phase composition are stable, physicochemical property and granular size and grade be furnished with much relations.It not only influences flowability, also influences agglutinating property and molten steel permeability.So under different granulometric ranges and grating, the drainage filler has been done the cold conditions flowing test.By to different material, different gradation test, determined best granulometric range, bulk density, grain shape respectively, most critical is to add proper amount of lubricating agent, thereby makes the drainage agent that good natural mobile performance be arranged, to give full play to the flowability of filler.
The specific embodiment
Refining calcined magnesium olivine sand: its MgO content 42%, SiO
2Content is 45%, moisture 0.3%; The parts by weight proportioning is 60%; Its grain size distribution 0.5-3.0mm is 20%, and 1.0-3.0mm is 20%, and 0.5-2.0mm is 35%, and 0.5-2.5mm is 25%.
Refining magnesia: its MgO content 81%, moisture 0.3%; The parts by weight proportioning is 8%; Its grain size distribution 0.5-3.0mm is 25%, and 1.0-3.0mm is 30%, and 0.5-2.0mm is 25%, and 0.5-2.5mm is 20%.
Refining quartz sand: its SiO
2Content 91%, moisture 0.3%; The parts by weight proportioning is 14%; Its grain size distribution 0.5-3.0mm is 25%, and 1.0-3.0mm is 35%, and 0.5-2.0mm is 15%, and 0.5-2.5mm is 25%.
Refining chrome ore: its Cr
2O
3Content 48%, moisture 0.3%; The parts by weight proportioning is 11%; Its grain size distribution 0.5-3.0mm is 15%, and 1.0-3.0mm is 20%, and 0.5-2.0mm is 35%, and 0.5-2.5mm is 30%.
Feldspar: its chemical analysis SiO
2: 41%, AL
2O
3: 15%, CaO:15%, K
2O:16%, Na
2O:10%, moisture 0.2%; Parts by weight proportioning 6%; Its grain size distribution 0.5-3.0mm is 30%, and 0.5-2.0mm is 30%, and 0.5-2.5mm is 20%, and 1.0-3.0mm is 20%.
Graphite: its chemical analysis C:70%, moisture 0.2%; Parts by weight proportioning 1%; Be 320 order fine powders.
Earlier calcined magnesium olivine sand is added in the mixer, stirred 10 minutes, afterwards, add quartz sand, stirred 15 minutes; Add magnesia, stirred 20 minutes; Add chrome ore, stirred 25 minutes; Add feldspar, stirred 30 minutes; Add graphite, stirred 5 minutes.
Alkalescence is drawn sulphur sand and is prepared factory building sealing, indoor conditions, 20 ℃ of temperature, humidity 30%.
Mixer is a closed, and volume is 1m
3, its discharging opening is apart from the 1.0 meters clear space in position that connect material; The height of clout in the mixer after the discharging in device is at 10-30mm.
Connect material by the mixer discharging opening and to use the woven bag have the thick plastic lining of 0.5mm, 5Kg/ bag.
With the woven bag after connecting material, adopt the resistance heat sealing, guarantee tight.
Packed finished product after sealing is housed in the drying room deposits, when dispatching from the factory, moisture content of finished products≤0.5%.
Each output continuously is not less than 3 tons.
The each storage of drying room is no more than 12 tons.
The ladle that the invention provides and prepare alkaline flow guiding agent; the production that reaches two years on the large-scale ladle of Beijing Shoudu Steel Co., Ltd's second steel mill through test of many times is used; reached molten steel smoothly from watering; improve casting machine and connect the rate of watering; the casting of realization full guard; promote the tundish metallurgy effect, improve steel quality, adapt to the composite request of environmental protection new situations.
Claims (8)
1. alkaline flow guiding sand used in steel ladle is characterized in that: comprise calcined magnesium olivine sand, quartz sand, magnesia, chrome ore, feldspar and the graphite of refining each grain composition, the alkali metal compound content of described drainage sand is greater than the nonmetallic compound sum.
2. alkaline flow guiding sand used in steel ladle according to claim 1 is characterized in that: described refining calcined magnesium olivine sand, and its parts by weight proportioning is 55-70%; MgO content in the calcined magnesium olivine sand between 38-55%, SiO
2Content is between 30-50%, and moisture is less than 0.5%; The granularity of wherein said refining calcined magnesium olivine sand comprises following several:
0.5-3.0mm，1.0-3.0mm，0.5-2.0mm，0.5-2.5mm。
3. alkaline flow guiding sand used in steel ladle according to claim 1 is characterized in that described refining magnesia, and its parts by weight proportioning is 5-10%; MgO content in the magnesia is between 65-85%, and moisture is less than 0.5%; The granularity of wherein said magnesia comprises following several:
0.5-3.0mm，1.0-3.0mm，0.5-2.0mm，0.5-2.5mm。
4. alkaline flow guiding sand used in steel ladle according to claim 1 is characterized in that: described refining quartz sand, and its parts by weight proportioning is 5-15%; SiO in the quartz sand
2Content is between 80-93%, and moisture is less than 0.5%; The granularity of wherein said quartz sand comprises following several:
0.5-3.0mm，1.0-3.0mm，0.5-2.0mm，0.5-2.5mm。
5. alkaline flow guiding sand used in steel ladle according to claim 1 is characterized in that: described refining chrome ore, and its parts by weight proportioning is 3-15%; Cr in the chrome ore
2O
3Content should be between 40-55%, and moisture is less than 0.5%; The granularity of wherein said chrome ore comprises following several:
0.5-3.0mm，1.0-3.0mm，0.5-2.0mm，0.5-2.5mm。
6. alkaline flow guiding sand used in steel ladle according to claim 1 is characterized in that: described feldspar, and its parts by weight proportioning is 3-8%; The chemical analysis of feldspar is: SiO
2: 40-60%, AL
2O
3: 10-30%, CaO:10-25%, K
2O:16%, Na
2O:10%, moisture is less than 0.5%.
The granularity of wherein said feldspar comprises following several:
0.5-3.0mm，1.0-3.0mm，0.5-2.0mm，0.5-2.5mm。
7. alkaline flow guiding sand used in steel ladle according to claim 1 is characterized in that described graphite, and its parts by weight proportioning is 0.2-1%; Graphitic carbon content is the graphite fine powder greater than 65%, and moisture is less than 0.5%.
8. the preparation method of an alkaline flow guiding sand used in steel ladle, it is characterized in that: described refining calcined magnesium olivine sand, quartz sand, magnesia, chrome ore, feldspar and graphite are carried out fragmentation, processing, screening obtain described various grade, add successively in the blender by described weight proportion, stir and get.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021585709A CN1509827A (en) | 2002-12-26 | 2002-12-26 | Alkali inducing sand for ladle and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021585709A CN1509827A (en) | 2002-12-26 | 2002-12-26 | Alkali inducing sand for ladle and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1509827A true CN1509827A (en) | 2004-07-07 |
Family
ID=34237056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021585709A Pending CN1509827A (en) | 2002-12-26 | 2002-12-26 | Alkali inducing sand for ladle and production thereof |
Country Status (1)
| Country | Link |
|---|---|
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100475387C (en) * | 2007-09-03 | 2009-04-08 | 武汉科技大学 | White olivine ladle draining sand and method for preparing the same |
| CN101444842B (en) * | 2008-12-30 | 2010-06-16 | 沈阳东北大学冶金技术研究所有限公司 | Alkaline flow guiding sand used in steel ladle |
| CN101972847A (en) * | 2010-09-21 | 2011-02-16 | 上海盛江特种耐火材料有限公司 | Chrome drainage sand for special steel and preparation technology thereof |
| CN102000790A (en) * | 2010-10-28 | 2011-04-06 | 成都府天新材料科技有限公司 | Manufacturing method of low-chromium environment-friendly ladle filler sand |
| CN102033021A (en) * | 2010-10-22 | 2011-04-27 | 首钢总公司 | Testing method for quantifying sintering property of flow guiding sand |
| CN102249709A (en) * | 2011-05-19 | 2011-11-23 | 攀枝花市银江金勇工贸有限责任公司 | Chrome fluxing agent for steel ladles and preparation method thereof |
| CN102248155A (en) * | 2011-07-28 | 2011-11-23 | 西峡县隆达耐材有限责任公司 | Refining drainage agent and preparation method thereof |
| CN102584278A (en) * | 2012-01-12 | 2012-07-18 | 浙江铭德新材科技有限公司 | Forsterite seating brick and production method of forsterite seating brick |
| CN103708842A (en) * | 2013-12-12 | 2014-04-09 | 南阳铭鑫斯迪奥科技有限公司 | Chrome-magnesia-zircon stuffing sand and preparation method thereof |
| CN104148625A (en) * | 2014-08-26 | 2014-11-19 | 马鞍山市宁生耐火材料有限责任公司 | Preparation method of refined chromite-based stuffing sand |
| CN105541358A (en) * | 2015-12-31 | 2016-05-04 | 上海荣源冶金材料有限公司 | High-quality chromium drainage sand for steel ladle |
| CN106061922A (en) * | 2014-03-26 | 2016-10-26 | 山川产业株式会社 | Alumina-based filling sand for sliding nozzle |
| CN108421970A (en) * | 2018-03-19 | 2018-08-21 | 河南通宇冶材集团有限公司 | A kind of preparation method of graininess chromium matter stuffing sand |
| CN114315321A (en) * | 2021-12-22 | 2022-04-12 | 河南通宇冶材集团有限公司 | Special drainage agent for cord steel and preparation method thereof |
| CN115650740A (en) * | 2022-09-14 | 2023-01-31 | 泰州市科博力新材料科技有限公司 | High-quality magnesia drainage sand for steel ladle and preparation method thereof |
| CN115772027A (en) * | 2022-12-16 | 2023-03-10 | 河南玄同新材料技术有限公司 | Preparation method of alkaline drainage agent |
-
2002
- 2002-12-26 CN CNA021585709A patent/CN1509827A/en active Pending
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100475387C (en) * | 2007-09-03 | 2009-04-08 | 武汉科技大学 | White olivine ladle draining sand and method for preparing the same |
| CN101444842B (en) * | 2008-12-30 | 2010-06-16 | 沈阳东北大学冶金技术研究所有限公司 | Alkaline flow guiding sand used in steel ladle |
| CN101972847A (en) * | 2010-09-21 | 2011-02-16 | 上海盛江特种耐火材料有限公司 | Chrome drainage sand for special steel and preparation technology thereof |
| CN101972847B (en) * | 2010-09-21 | 2012-11-21 | 上海盛江特种耐火材料有限公司 | Chrome drainage sand for special steel and preparation technology thereof |
| CN102033021A (en) * | 2010-10-22 | 2011-04-27 | 首钢总公司 | Testing method for quantifying sintering property of flow guiding sand |
| CN102000790A (en) * | 2010-10-28 | 2011-04-06 | 成都府天新材料科技有限公司 | Manufacturing method of low-chromium environment-friendly ladle filler sand |
| CN102000790B (en) * | 2010-10-28 | 2013-07-31 | 成都府天新材料科技有限公司 | Manufacturing method of low-chromium environment-friendly ladle filler sand |
| CN102249709A (en) * | 2011-05-19 | 2011-11-23 | 攀枝花市银江金勇工贸有限责任公司 | Chrome fluxing agent for steel ladles and preparation method thereof |
| CN102249709B (en) * | 2011-05-19 | 2013-09-11 | 攀枝花市银江金勇工贸有限责任公司 | Chrome fluxing agent for steel ladles and preparation method thereof |
| CN102248155A (en) * | 2011-07-28 | 2011-11-23 | 西峡县隆达耐材有限责任公司 | Refining drainage agent and preparation method thereof |
| CN102584278A (en) * | 2012-01-12 | 2012-07-18 | 浙江铭德新材科技有限公司 | Forsterite seating brick and production method of forsterite seating brick |
| CN102584278B (en) * | 2012-01-12 | 2013-09-04 | 浙江铭德新材科技有限公司 | Forsterite seating brick and production method of forsterite seating brick |
| CN103708842A (en) * | 2013-12-12 | 2014-04-09 | 南阳铭鑫斯迪奥科技有限公司 | Chrome-magnesia-zircon stuffing sand and preparation method thereof |
| CN103708842B (en) * | 2013-12-12 | 2016-03-02 | 南阳铭鑫斯迪奥科技有限公司 | A kind of chromium magnesium zirconium matter stuffing sand and preparation method thereof |
| CN106061922A (en) * | 2014-03-26 | 2016-10-26 | 山川产业株式会社 | Alumina-based filling sand for sliding nozzle |
| CN106061922B (en) * | 2014-03-26 | 2019-08-20 | 山川产业株式会社 | Alumina base for slide gate nozzle fills sand |
| CN104148625A (en) * | 2014-08-26 | 2014-11-19 | 马鞍山市宁生耐火材料有限责任公司 | Preparation method of refined chromite-based stuffing sand |
| CN104148625B (en) * | 2014-08-26 | 2016-05-18 | 马鞍山市宁生耐火材料有限责任公司 | A kind of preparation method of refining chromium matter stuffing sand |
| CN105541358A (en) * | 2015-12-31 | 2016-05-04 | 上海荣源冶金材料有限公司 | High-quality chromium drainage sand for steel ladle |
| CN108421970A (en) * | 2018-03-19 | 2018-08-21 | 河南通宇冶材集团有限公司 | A kind of preparation method of graininess chromium matter stuffing sand |
| CN114315321A (en) * | 2021-12-22 | 2022-04-12 | 河南通宇冶材集团有限公司 | Special drainage agent for cord steel and preparation method thereof |
| CN115650740A (en) * | 2022-09-14 | 2023-01-31 | 泰州市科博力新材料科技有限公司 | High-quality magnesia drainage sand for steel ladle and preparation method thereof |
| CN115650740B (en) * | 2022-09-14 | 2023-10-27 | 泰州市科博力新材料科技有限公司 | Magnesia drainage sand for high-quality steel ladle and preparation method thereof |
| CN115772027A (en) * | 2022-12-16 | 2023-03-10 | 河南玄同新材料技术有限公司 | Preparation method of alkaline drainage agent |
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