CN101275176A - Production method for high-basicity hollow particle heat-insulating hot metal covering flux - Google Patents
Production method for high-basicity hollow particle heat-insulating hot metal covering flux Download PDFInfo
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- CN101275176A CN101275176A CNA2007101592656A CN200710159265A CN101275176A CN 101275176 A CN101275176 A CN 101275176A CN A2007101592656 A CNA2007101592656 A CN A2007101592656A CN 200710159265 A CN200710159265 A CN 200710159265A CN 101275176 A CN101275176 A CN 101275176A
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- molten steel
- lime
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to a production method for high alkalinity hollow particle molten steel heat-preserving covering agent, the method comprising the steps of: using a Raymond machine to crush lime powder to the powder lower than 200 meshes, and placing the crushed lime thin powder into a temperature-controllable high speed stirrer, adding passivator of 1-2%, controlling the temperature between 80 and 100 DEG C, stirring in high speed for 5 to 10 minutes; then mixing the passivated lime powder with wollastonite in powder, bonding agent according to the smelting-required alkalinity to form slurry, spraying and granulating to produce the high alkalinity hollow particle molten steel heat-preserving covering agent; the technology of the invention can be applied to the production flow of steel-making continuous casting procedure, and efficiently adsorb the impurities in the molten steel at the same time of guaranteeing the heat preservation effect, improving the end product quality of steel.
Description
Technical field
The present invention relates to the metallurgical industry production technology, be applied to the production method of the metallurgy of molten steel insulation with subsidiary material.
Background technology
Along with improving constantly of Iron and Steel Production technology, also more and more higher with requirement of aided materials to steel-making.Develop into from single heat insulation function originally for the requirement of heat preserving agent for liquid steel and to have insulation concurrently, prevent that atmosphere is to multinomial functions such as the secondary oxidation of molten steel, absorption molten steel inclusiones.At present, the molten steel insulation insulating covering agent mainly contains acid thermal-insulating covering agent and alkaline thermal-insulating covering agent.Wherein, acid thermal-insulating covering agent good heat preservation performance is mingled with but be unfavorable for absorbing.Though it is good that the alkalescence thermal-insulating covering agent absorbs being mingled with property, heat retaining property is poor, easily crusts during use.Though smelting, high-level steel grade such as Clean Steel needs alkaline thermal-insulating covering agent, normally used alkaline thermal-insulating covering agent basicity (CaO%/SiO
2Be about 1 %), can not satisfy smelting requirements.
Adopt atomizing granulating technology to produce hollow particle molten steel insulation insulating covering agent, have good heat preservation performance, even the basicity height does not crust in the use yet.But lime (CaO) is aquation easily, and the pulping process of atomizing granulating technology absorbs big water gaging heating, influences the atomizing granulating technology direct motion, can not produce the hollow particle thermal-insulating covering agent by mist projection granulating.At present, main production with wollastonite (about basicity 1) is main raw material or is the hollow particle molten steel insulation insulating covering agent of main raw material with magnesium oxide (CaO content is very low).Though solved the heat retaining property problem, CaO content is low can not to satisfy the being mingled with property of absorption of smelting needs.
Summary of the invention
The production method that the purpose of this invention is to provide a kind of high basicity hollow particle molten steel insulation insulating covering agent, this product is at first handled the lime powder surface passivation, make it have not aquation of hydrophobicity, mix pulping with raw materials such as wollastonites again, spraying produces by smelting requirements, solved the difficult problem that the lime efflorescence can not mist projection granulating be produced high basicity hollow particle.
The production method of the high basicity hollow particle of the present invention molten steel insulation insulating covering agent is described below:
The production method of high basicity hollow particle molten steel insulation insulating covering agent, it is characterized in that: adopt Raymond machine that lime powder is broken into powder below 200 orders, the lime fine powder that fragmentation is good is put into the homogenizer of controllable temperature, add 1～2% passivator, temperature is controlled between 80～100 ℃, and high-speed stirring was handled 5～10 minutes; Again the lime powder after the passivation is mixed pulping with wollastonite powder, binding agent by the basicity of smelting requirements, mist projection granulating is produced high basicity hollow particle molten steel insulation insulating covering agent;
Wherein the part by weight of passive lime powder and wollastonite powder, binding agent is: passive lime powder 20-60 part, wollastonite powder 10-50 part, binding agent 2-5 part; Basicity (CaO/SiO
2)=2-5, the granularity of above raw material is 0.1-1.0mm.
Described passivator is selected from stearic acid, silicone oil or other hydrophobic surface passivator.
Described binding agent is selected from a kind of in starch, flour or the chemical glue.
The technology of the present invention can be applied in the steel-making continuous casting explained hereafter flow process, when guaranteeing heat insulation effect, can adsorb molten steel effectively and be mingled with, and improves the steel final product quality.
Embodiment
Embodiment 1
The production method of high basicity hollow particle molten steel insulation insulating covering agent, this method adopts Raymond machine that lime powder is broken into powder below 200 orders, the lime fine powder that fragmentation is good is put into the homogenizer of controllable temperature, add 1～2% stearic acid, temperature is controlled between 80～100 ℃, and high-speed stirring was handled 5～10 minutes; Again the lime powder after the passivation is mixed pulping with wollastonite powder, binding agent by the basicity of smelting requirements, mist projection granulating is produced high basicity hollow particle molten steel insulation insulating covering agent;
Wherein the part by weight of passive lime powder and wollastonite powder, binding agent is: 40 parts in passive lime powder, 30 parts of wollastonite powder, 3 parts of starch adesives; Basicity (CaO/SiO
2)=2-5, the granularity of above raw material is 0.1-1.0mm.
Lime powder surface after the processing evenly covers one deck stearic acid or other hydrophobic surface passivator, has completely cut off lime powder and has contacted with extraneous water, not aquation.
The technological process of production is:
Lime → be ground into powder → surface passivation processing → adding wollastonite powder, binding agent etc. adds water pulping → mist projection granulating → screening → packing.
Embodiment 2
The production method of high basicity hollow particle molten steel insulation insulating covering agent, this method adopts Raymond machine that lime powder is broken into powder below 200 orders, the lime fine powder that fragmentation is good is put into the homogenizer of controllable temperature, add 1～2% stearic acid, temperature is controlled between 80～100 ℃, and high-speed stirring was handled 5～10 minutes; Again the lime powder after the passivation is mixed pulping with wollastonite powder, cereal binder by the basicity of smelting requirements, mist projection granulating is produced high basicity hollow particle molten steel insulation insulating covering agent;
The part by weight of passive lime powder and wollastonite powder, binding agent is: 20 parts in passive lime powder, 10 parts of wollastonite powder, 2 parts of binding agents; Basicity (CaO/SiO
2)=2-5, the granularity of above raw material is 0.1-1.0mm.
Embodiment 3
The production method of high basicity hollow particle molten steel insulation insulating covering agent, this method adopts Raymond machine that lime powder is broken into powder below 200 orders, the lime fine powder that fragmentation is good is put into the homogenizer of controllable temperature, add 1～2% stearic acid, temperature is controlled between 80～100 ℃, and high-speed stirring was handled 5～10 minutes; Again the lime powder after the passivation is mixed pulping with wollastonite powder, chemical glue binding agent by the basicity of smelting requirements, mist projection granulating is produced high basicity hollow particle molten steel insulation insulating covering agent;
The part by weight of passive lime powder and wollastonite powder, binding agent is: 60 parts in passive lime powder, 50 parts of wollastonite powder, 5 parts of binding agents; Basicity (CaO/SiO
2)=2-5, the granularity of above raw material is 0.1-1.0mm.
Claims (3)
1, the production method of high basicity hollow particle molten steel insulation insulating covering agent, it is characterized in that: adopt Raymond machine that lime powder is broken into powder below 200 orders, the lime fine powder that fragmentation is good is put into the homogenizer of controllable temperature, add 1～2% passivator, temperature is controlled between 80～100 ℃, and high-speed stirring was handled 5～10 minutes; Again the lime powder after the passivation is mixed pulping with wollastonite powder, binding agent by the basicity of smelting requirements, mist projection granulating is produced high basicity hollow particle molten steel insulation insulating covering agent;
Wherein the part by weight of passive lime powder and wollastonite powder, binding agent is: passive lime powder 20-60 part, wollastonite powder 10-50 part, binding agent 2-5 part; Basicity (CaO/SiO
2)=2-5, the granularity of above raw material is 0.1-1.0mm.
2, the production method of high basicity hollow particle molten steel insulation insulating covering agent according to claim 1 is characterized in that: described passivator is selected from stearic acid, silicone oil or other hydrophobic surface passivator.
3, the production method of high basicity hollow particle molten steel insulation insulating covering agent is characterized in that: described binding agent is selected from a kind of in starch, flour or the chemical glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101592656A CN101275176A (en) | 2007-12-28 | 2007-12-28 | Production method for high-basicity hollow particle heat-insulating hot metal covering flux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101592656A CN101275176A (en) | 2007-12-28 | 2007-12-28 | Production method for high-basicity hollow particle heat-insulating hot metal covering flux |
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| CN101275176A true CN101275176A (en) | 2008-10-01 |
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| CNA2007101592656A Pending CN101275176A (en) | 2007-12-28 | 2007-12-28 | Production method for high-basicity hollow particle heat-insulating hot metal covering flux |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071331A (en) * | 2011-02-15 | 2011-05-25 | 江苏大学 | Smelting preparation method of high-purity high-silicon manganese-silicon alloy |
| CN111304397A (en) * | 2020-03-31 | 2020-06-19 | 鞍钢股份有限公司 | Method for reducing temperature drop of molten iron in KR desulfurization process |
-
2007
- 2007-12-28 CN CNA2007101592656A patent/CN101275176A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071331A (en) * | 2011-02-15 | 2011-05-25 | 江苏大学 | Smelting preparation method of high-purity high-silicon manganese-silicon alloy |
| CN102071331B (en) * | 2011-02-15 | 2012-08-29 | 江苏大学 | Smelting preparation method of high-purity high-silicon manganese-silicon alloy |
| CN111304397A (en) * | 2020-03-31 | 2020-06-19 | 鞍钢股份有限公司 | Method for reducing temperature drop of molten iron in KR desulfurization process |
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Open date: 20081001 |