CN1513624A - Carbonless prremelt hollow type alkali pouring basket covering agent - Google Patents

Carbonless prremelt hollow type alkali pouring basket covering agent Download PDF

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Publication number
CN1513624A
CN1513624A CNA021399344A CN02139934A CN1513624A CN 1513624 A CN1513624 A CN 1513624A CN A021399344 A CNA021399344 A CN A021399344A CN 02139934 A CN02139934 A CN 02139934A CN 1513624 A CN1513624 A CN 1513624A
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CN
China
Prior art keywords
hollow type
carbon
covering agent
prremelt
carbonless
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CNA021399344A
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Chinese (zh)
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CN1257031C (en
Inventor
王兆达
江浦琼
项建中
丁劲光
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SHANGHAI BAOYI THERMAL-INSULATION MATERIAL Co Ltd
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SHANGHAI BAOYI THERMAL-INSULATION MATERIAL Co Ltd
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Priority to CN 02139934 priority Critical patent/CN1257031C/en
Publication of CN1513624A publication Critical patent/CN1513624A/en
Application granted granted Critical
Publication of CN1257031C publication Critical patent/CN1257031C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Ceramic Products (AREA)
  • Continuous Casting (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

A premolten non-carbon alkaline hollow-type covering agent for tundish contains CaO (45-55 wt.%), MgO (9.5-18.5), Al2O3 (7.5-16.5), SiO3 (16-24), Fe2O3 (0-2) and inherent carbon (0-0.1). Its advantages are high spreading performance, uniformity and thermal insulation, and high effect on preventing secondary oxidation of molten steel.

Description

A kind of carbon-free fritting hollow type alkalescence tundish covering flux
The present invention relates to a kind of tundish covering flux, particularly relate to a kind of carbon-free fritting hollow type alkalescence tundish covering flux.
General tundish covering flux generally adopts acidity, neutrality, alkaline powdery or graininess (solid) tundish covering flux of carbon containing at present; Adopt low-carbon (LC)s, Ultra-low carbon hollow type alkalescence tundish covering flux individually, but do not see the report of carbon-free fritting hollow type alkalescence tundish covering flux.As everyone knows, the tundish covering flux of carbon containing is one of factor that causes molten steel recarburization; Acid tundish covering flux is higher because of lower oxyde (FeO, MnO, SiO2 etc.) content, not only easily makes secondary oxidation of steel, the alkaline tundish cylinder-packing of also serious erosion; Graininess (solid) tundish covering flux heat-insulating property is not good enough, easily crust.
The objective of the invention is to solve that the middle coverture of carbon containing causes molten steel recarburization in the prior art, acid tundish covering flux is because of lower oxyde (FeO, MnO, SiO 2Deng) content is higher, not only easily makes secondary oxidation of steel, also seriously corrodes alkaline tundish cylinder-packing; Graininess (solid) tundish covering flux heat-insulating property is not good enough, the problem of easy crust etc.Technical scheme of the present invention is a kind of carbon-free fritting hollow type alkalescence tundish covering flux of design, and it is characterized in that: be made up of following constituent and percentage by weight, CaO 45%---55%, and MgO9.5%---18.5%, Al 2O 37.5%---16.5%, SiO 316%---24%, Fe 2O 30%---2%, fixed carbon 0%---0.1%.Advantage of the present invention is not add any carbon materials in the carbon-free fritting hollow type alkalescence tundish covering flux, has stopped the carburetting hidden danger that causes because of tundish covering flux; Spreadability, homogeneity, heat insulating ability are good, help the stabilizing continuous casting pulling rate; Adopt CaO-MgO-Al 2O 3-SiO 2Slag system, slag MgO saturation degree is lower, with magnesia, the calcareous spray paint cylinder-packing of magnesium compatibility is preferably arranged; Basicity is higher, fusing point, molten speed coupling, and viscosity is suitable, and lower oxyde content is low, can effectively prevent secondary oxidation of steel, has stronger absorption Al 2O 3The non-metallic inclusion ability helps improving the continuous casting billet inherent quality.
Below in conjunction with embodiment the present invention is elaborated:
Chemical analysis (by weight) meter of tundish covering flux is got 50 kilograms of CaO, 14 kilograms of MgO, Al 2O 312 kilograms, SiO 220 kilograms, Fe 2O 31.5 kilogram adds bond and water, makes the slip of solid content about 63%, is delivered to the granulation of mist projection granulating tower, oven dry through plunger displacement pump, spray gun, makes hollow, spheric granules (Φ 0.1-1.0mm 〉=95%), classified again sieve screening back finished product packing.This tundish covering flux can be eliminated the carburetting hidden danger that causes because of tundish covering flux during use; Spreadability, homogeneity, heat insulating ability are good, do not crust; Fusing point, molten speed coupling, viscosity is suitable, can prevent secondary oxidation of steel, Al 2O 3Adsorption rate reaches about 30%; Basicity is higher, and slag MgO saturation degree is lower, with magnesia, the calcareous spray paint cylinder-packing of magnesium compatibility is preferably arranged, turn over when bag working lining can come off automatically, permanent layer is intact.Carbon-free fritting hollow type alkalescence tundish covering flux is as " tundish metallurgy "---and the supplementary measures of " tundish alkalescence technology " this system engineering help improving the continuous casting billet inherent quality.

Claims (1)

  1. A kind of carbon-free fritting hollow type alkalescence tundish covering flux is characterized in that: forms by following constituent and percentage by weight,
    CaO 45％——55％，
    MgO 9.5％——18.5％，
    Al 2O 3 7.5％——16.5％，
    SiO 3 16％——24％，
    Fe 2O 3 0％——2％，
    Fixed carbon 0%---0.1%,
CN 02139934 2002-12-31 2002-12-31 Carbonless prremelt hollow type alkali pouring basket covering agent Expired - Fee Related CN1257031C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 02139934 CN1257031C (en) 2002-12-31 2002-12-31 Carbonless prremelt hollow type alkali pouring basket covering agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 02139934 CN1257031C (en) 2002-12-31 2002-12-31 Carbonless prremelt hollow type alkali pouring basket covering agent

Publications (2)

Publication Number Publication Date
CN1513624A true CN1513624A (en) 2004-07-21
CN1257031C CN1257031C (en) 2006-05-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 02139934 Expired - Fee Related CN1257031C (en) 2002-12-31 2002-12-31 Carbonless prremelt hollow type alkali pouring basket covering agent

Country Status (1)

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CN (1) CN1257031C (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100446895C (en) * 2004-11-18 2008-12-31 上海宝谊保温材料有限公司 Cap agent with light alkaline particle steel coating
CN1803338B (en) * 2005-01-10 2010-08-04 上海盘龙实业有限公司 Environment-friendly type granular ladle covering agent containing carbon with double composite efficiency
CN101798233A (en) * 2010-02-10 2010-08-11 河南科技大学 Riser heating and insulating agent
CN102807382A (en) * 2012-08-27 2012-12-05 苏州罗卡节能科技有限公司 Nonmetallic hollow sphere
CN103273028A (en) * 2013-06-11 2013-09-04 鞍钢股份有限公司 Tundish covering agent and preparation and use method thereof
CN106493321A (en) * 2016-11-08 2017-03-15 凯诺斯(中国)铝酸盐技术有限公司 Steel-making tundish covering flux and preparation method thereof
CN110102725A (en) * 2019-05-16 2019-08-09 鞍山市和丰耐火材料有限公司 A kind of magnesia tundish hollow particle coverture of height being not crusted and its production method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100446895C (en) * 2004-11-18 2008-12-31 上海宝谊保温材料有限公司 Cap agent with light alkaline particle steel coating
CN1803338B (en) * 2005-01-10 2010-08-04 上海盘龙实业有限公司 Environment-friendly type granular ladle covering agent containing carbon with double composite efficiency
CN101798233A (en) * 2010-02-10 2010-08-11 河南科技大学 Riser heating and insulating agent
CN101798233B (en) * 2010-02-10 2012-07-04 河南科技大学 Riser heating and insulating agent
CN102807382A (en) * 2012-08-27 2012-12-05 苏州罗卡节能科技有限公司 Nonmetallic hollow sphere
CN103273028A (en) * 2013-06-11 2013-09-04 鞍钢股份有限公司 Tundish covering agent and preparation and use method thereof
CN106493321A (en) * 2016-11-08 2017-03-15 凯诺斯(中国)铝酸盐技术有限公司 Steel-making tundish covering flux and preparation method thereof
CN110102725A (en) * 2019-05-16 2019-08-09 鞍山市和丰耐火材料有限公司 A kind of magnesia tundish hollow particle coverture of height being not crusted and its production method

Also Published As

Publication number Publication date
CN1257031C (en) 2006-05-24

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Granted publication date: 20060524

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