CN108723313A - The covering slag of high grade cold rolling silicon steel - Google Patents
The covering slag of high grade cold rolling silicon steel Download PDFInfo
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- CN108723313A CN108723313A CN201810714026.0A CN201810714026A CN108723313A CN 108723313 A CN108723313 A CN 108723313A CN 201810714026 A CN201810714026 A CN 201810714026A CN 108723313 A CN108723313 A CN 108723313A
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- silicon steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses the covering slags of high grade cold rolling silicon steel, are prepared by the parts by weight of following feed components：40~50 parts of wollastonite, 10~15 parts of Fluorspar Powder, 3~5 parts of sodium fluoride, 10~15 parts of soda ash, 10~15 parts of pre- melt, 5~12 parts of ice crystal etc.; the high grade cold rolling Protecting Slag In Silicon Steel; fusing point is low, when slag can rapid melting it is uniform, slagging speed is fast; slag film uniform in shaping; molten steel fluctuates widely during avoiding slag, it is ensured that hot-fluid is stablized, and slag process is paid close attention to without the moment; reduce worker's workload, effectively save cost of labor.
Description
Technical field
The present invention relates to continuous casting technology field, the covering slag of specially high grade cold rolling silicon steel.
Background technology
The non-orientation silicon steel of 2.3% or more silicone content (iron loss P1.5/50≤4.00W/Kg) is high grade cold rolling silicon steel, main
It is used to manufacture large and medium-sized motor and generator.Nippon and Kawasaki company are the leaders of high grade cold rolling silicon steel technology
The main supplier of person and product, with China's electric power, the fast development of electronics industry, high grade cold rolling non-oriented silicon steel demand
Increasingly increase, China has become high grade cold rolling silicon steel first and consumes big country, and the research and development of high grade cold rolling silicon steel are thrown in China
Entering and is also stepped up, covering slag is the slag charge constantly added on the molten steel surface of four wall of crystallizer in molten steel casting process,
Have：Adiabatic heat-insulation prevents heat dissipation, isolation air from preventing secondary oxidation of steel, adsorbing contaminant purification molten steel, lubrication strand, control
Various effects such as Billet, thus covering slag for research and develop high grade cold rolling silicon steel serve it is key.
Since high grade cold rolling Protecting Slag In Silicon Steel is a kind of high very important material of grade cold rolling silicon steel of production, to life
The stability and product quality of production process have decisive impact, meanwhile, high grade cold rolling Protecting Slag In Silicon Steel and other steel grades
The requirement of covering slag is also not quite similar, and high grade cold rolling Protecting Slag In Silicon Steel is multiple due to high grade cold rolling non-oriented silicon steel manufacturing process
Miscellaneous, Composition Control is stringent, impurity content requires extremely low, manufacturing process head and the multipair high grade silicon steel covering slag requirement of influence factor
It also improves very much, and existing covering slag is easy the cold steel of knot when in use, liquid steel level is inactive, causes to be lost in casting process
Molten steel is larger, cast when liquid fluctuating it is big, slag item is abnormal, needs the artificial moment to pay close attention to, not only increases cost of labor, also increase
The safety of workload, casting process is relatively low, and bonding steel leakage accident easily occurs, and high grade cold rolling silicon steel production cost is caused to increase
Add, production efficiency it is relatively low, it is therefore desirable to a kind of high grade cold rolling Protecting Slag In Silicon Steel that can be solved the above problems.
Invention content
It is mentioned above in the background art to solve the purpose of the present invention is to provide the covering slag of high grade cold rolling silicon steel
Problem.
To achieve the above object, the present invention provides the following technical solutions：
The covering slag of high grade cold rolling silicon steel, is prepared by the parts by weight of following feed components：Wollastonite 40~50
Part, 10~15 parts of Fluorspar Powder, 3~5 parts of sodium fluoride, 10~15 parts of soda ash, 10~15 parts of pre- melt, 5~12 parts of ice crystal, card are rich
3~4 parts of special carbon black, 1~2 part of semi-reinforcing hydrocarbon black, 3~5 parts of lithium carbonate, 2~5 parts of hydroxymethyl cellulose.
Preferably, it is prepared by the parts by weight of following feed components：42 parts of wollastonite, 12 parts of Fluorspar Powder, sodium fluoride 4
Part, 12 parts of soda ash, 12 parts of pre- melt, 6 parts of ice crystal, 3.5 parts of Cabot carbon black, 1.5 parts of semi-reinforcing hydrocarbon black, 4 parts of lithium carbonate, hydroxyl
3 parts of methylcellulose.
Preferably, each ingredient percentage composition includes in the wollastonite：CaO：46 ± 2%, SiO2：50 ± 2%,
Fe2O3：≤ 1%, MgO：≤ 1%, the mesh of loss on ignition≤2.5% of the wollastonite, water content≤0.5%, granularity≤200.
Preferably, CaF in the Fluorspar Powder2Content >=95%, and fluorite Powder Particle Size be 200 mesh full by, in super charcoal
Content >=95% of black middle C, content >=97% of C in semi-reinforcing hydrocarbon black.
The preparation process of the covering slag of high grade cold rolling silicon steel, includes the following steps：
S1. raw material preparation：All raw material sampling Detections, water content≤0.5%, the mesh of granularity≤200；
S2. dispensing：Electronic proportioning error ± the 0.1Kg that weighs is carried out according to formula setting weight, is poured into batch can；
S3. siccative stirs：Material in batch can is put into mechanical agitation 15 minutes in twin-shaft mixer, is uniformly mixed；
S4. wet agitation grinding：Mixed dry material in S3 is put into levigator in mass ratio 1:1.5 addition moisture, wet stirring
Slurrying grinds 45 minutes and takes out slurry；
S5. mist projection granulating：Magma is made in S4 and is transported to mist projection granulating tower through conveyance conduit under a constant, is then divided
Starch spray granulating and drying；
S6. finished product detection is put in storage：The dry grain of detection, by the mesh of granularity >=80, the drying grain of water content≤0.5% dispenses 10kg
Transhipment storage storage after pouch sealing.
Preferably, 3000 type spray drying granulation tower, spray gun number are 14, pressure 1Mpa, mist projection granulating tower temperature
It is required that：Inlet temperature >=700 DEG C, outlet temperature >=150 DEG C.
Preferably, chemical composition and its weight percentage in the covering slag that prepared by the present invention include SiO2：
32~34%, CaO：26~28%, AL2O3：8~10%, MgO：≤ 1%, Fe2O3≤ 1%, F-：4~6%, K2O+Na2O+
Li2O：12~14%, C：2~4%.
Preferably, the dual alkalinity for the covering slag that prepared by the present invention is that 0.75 ± 0.05,1300 DEG C of viscosity is
0.25 ± 0.09Pa ﹒ s, fusing point are 995 ± 30 DEG C.
Compared with prior art, the beneficial effects of the invention are as follows：
1, the high grade cold rolling Protecting Slag In Silicon Steel, fusing point is low, when slag can rapid melting it is uniform, slagging speed is fast, shape
At uniform slag film, molten steel fluctuates widely during avoiding slag, it is ensured that hot-fluid is stablized, and slag is paid close attention to without the moment
Process reduces worker's workload, effectively save cost of labor；
2, the viscosity of the high grade cold rolling Protecting Slag In Silicon Steel is low, easy dispersion so that spreadability and heat insulation effect are above biography
System covering slag, after effectively realizing covering slag addition, molten steel liquid level is active, flare stabilization in crystallizer, and molten steel recovery rate is high；
3, it can effectively be solved because of the factors such as molten steel temperature is unstable, liquid fluctuating is big using high grade cold rolling Protecting Slag In Silicon Steel
Cause casting billet surface be easy to happen scab, carburetting, recess the defects of, effectively increase high grade cold rolling silicon steel the quality of production and
Production efficiency reduces production cost.
Specific implementation mode
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment 1
The covering slag of high grade cold rolling silicon steel, is prepared by the parts by weight of following feed components：40 parts of wollastonite, firefly
10 parts of mountain flour, 3 parts of sodium fluoride, 10 parts of soda ash, 10 parts of pre- melt, 5 parts of ice crystal, 3 parts of Cabot carbon black, 1 part of semi-reinforcing hydrocarbon black,
3 parts of lithium carbonate, 2 parts of hydroxymethyl cellulose.
Specifically, each ingredient percentage composition includes in wollastonite：CaO：46%, SiO2：50%, Fe2O3：0.7%,
MgO：0.6%, the loss on ignition of wollastonite：1.5%, water content：0.1%, granularity is 160 mesh.
Specifically, CaF in Fluorspar Powder2Content be 95%, and fluorite Powder Particle Size be 200 mesh full by C in ntermediate super abrasion furnace (carbon) black
Content be 95%, the content of C is 97% in semi-reinforcing hydrocarbon black.
The preparation process of the covering slag of high grade cold rolling silicon steel, includes the following steps：
S1. raw material preparation：All raw material sampling Detections, water content≤0.5%, the mesh of granularity≤200；
S2. dispensing：Electronic proportioning error ± the 0.1Kg that weighs is carried out according to formula setting weight, is poured into batch can；
S3. siccative stirs：Material in batch can is put into mechanical agitation 15 minutes in twin-shaft mixer, is uniformly mixed；
S4. wet agitation grinding：Mixed dry material in S3 is put into levigator in mass ratio 1:1.5 addition moisture, wet stirring
Slurrying grinds 45 minutes and takes out slurry；
S5. mist projection granulating：Magma is made in S4 and is transported to mist projection granulating tower through conveyance conduit under a constant, is then divided
Starch spray granulating and drying；
S6. finished product detection is put in storage：The dry grain of detection, by the mesh of granularity >=80, the drying grain of water content≤0.5% dispenses 10kg
Transhipment storage storage after pouch sealing.
Specifically, granulation tower tower is in S5：3000 type spray drying granulation towers, spray gun number are 12, and pressure is
1Mpa, mist projection granulating tower temperature requirement：700 DEG C of inlet temperature, 150 DEG C of outlet temperature.
Specifically, the chemical composition and its weight percentage in covering slag prepared by the present invention include SiO2：32%,
CaO：26%, AL2O3：8%, MgO：0.3%, Fe2O3：0.2%, F-：4%, K2O+Na2O+Li2O：12%, C：2%.
Specifically, the viscosity that the dual alkalinity of covering slag prepared by the present invention is 0.750,1300 DEG C is 0.250Pa ﹒ s, melt
Point is 995 DEG C.
Embodiment 2
The covering slag of high grade cold rolling silicon steel, is prepared by the parts by weight of following feed components：50 parts of wollastonite, firefly
15 parts of mountain flour, 5 parts of sodium fluoride, 15 parts of soda ash, 15 parts of pre- melt, 12 parts of ice crystal, 4 parts of Cabot carbon black, semi-reinforcing hydrocarbon black 2
Part, 5 parts of lithium carbonate, 5 parts of hydroxymethyl cellulose.
Specifically, each ingredient percentage composition includes in wollastonite：CaO：48%, SiO2：52%, Fe2O3：1%, MgO：
0.9%, the loss on ignition of wollastonite：2.5%, water content：0.5%, granularity is 200 mesh.
Specifically, CaF in Fluorspar Powder2Content 98%, and fluorite Powder Particle Size be 200 mesh full by C in ntermediate super abrasion furnace (carbon) black
Content is 98%, and the content of C is 99% in semi-reinforcing hydrocarbon black.
The preparation process of the covering slag of high grade cold rolling silicon steel, includes the following steps：
S1. raw material preparation：All raw material sampling Detections, water content≤0.5%, the mesh of granularity≤200；
S2. dispensing：Electronic proportioning error ± the 0.1Kg that weighs is carried out according to formula setting weight, is poured into batch can；
S3. siccative stirs：Material in batch can is put into mechanical agitation 15 minutes in twin-shaft mixer, is uniformly mixed；
S4. wet agitation grinding：Mixed dry material in S3 is put into levigator in mass ratio 1:1.5 addition moisture, wet stirring
Slurrying grinds 45 minutes and takes out slurry；
S5. mist projection granulating：Magma is made in S4 and is transported to mist projection granulating tower through conveyance conduit under a constant, is then divided
Starch spray granulating and drying；
S6. finished product detection is put in storage：The dry grain of detection, by the mesh of granularity >=80, the drying grain of water content≤0.5% dispenses 10kg
Transhipment storage storage after pouch sealing.
Specifically, granulation tower tower is in S5：3000 type spray drying granulation towers, spray gun number are 14, and pressure is
1Mpa, mist projection granulating tower temperature requirement：900 DEG C of inlet temperature, 300 DEG C of outlet temperature.
Specifically, the chemical composition and its weight percentage in covering slag prepared by the present invention include SiO2：34%,
CaO：28%, AL2O3：10%, MgO：0.8%, Fe2O3：0.7%, F-：6%, K2O+Na2O+Li2O：14%, C：4%.
Specifically, the viscosity that the dual alkalinity of covering slag prepared by the present invention is 0.755,1300 DEG C is 0.259Pa ﹒ s, melt
Point is 1025 DEG C.
Embodiment 3
The covering slag of high grade cold rolling silicon steel, is prepared by the parts by weight of following feed components：45 parts of wollastonite, firefly
13 parts of mountain flour, 4 parts of sodium fluoride, 13 parts of soda ash, 14 parts of pre- melt, 8 parts of ice crystal, 3.5 parts of Cabot carbon black, semi-reinforcing hydrocarbon black
1.5 parts, 4 parts of lithium carbonate, 3 parts of hydroxymethyl cellulose.
Specifically, each ingredient percentage composition includes in wollastonite：CaO：47%, SiO2：51%, Fe2O3：0.8%,
MgO：0.8%, the loss on ignition of wollastonite：1.5%, water content：0.3%, granularity is 180 mesh.
Specifically, CaF in Fluorspar Powder2Content 97%, and fluorite Powder Particle Size be 200 mesh full by C in ntermediate super abrasion furnace (carbon) black
Content is 97%, and the content of C is 98% in semi-reinforcing hydrocarbon black.
The preparation process of the covering slag of high grade cold rolling silicon steel, includes the following steps：
S1. raw material preparation：All raw material sampling Detections, water content≤0.5%, the mesh of granularity≤200；
S2. dispensing：Electronic proportioning error ± the 0.1Kg that weighs is carried out according to formula setting weight, is poured into batch can；
S3. siccative stirs：Material in batch can is put into mechanical agitation 15 minutes in twin-shaft mixer, is uniformly mixed；
S4. wet agitation grinding：Mixed dry material in S3 is put into levigator in mass ratio 1:1.5 addition moisture, wet stirring
Slurrying grinds 45 minutes and takes out slurry；
S5. mist projection granulating：Magma is made in S4 and is transported to mist projection granulating tower through conveyance conduit under a constant, is then divided
Starch spray granulating and drying；
S6. finished product detection is put in storage：The dry grain of detection, by the mesh of granularity >=80, the drying grain of water content≤0.5% dispenses 10kg
Transhipment storage storage after pouch sealing.
Specifically, granulation tower tower is in S5：3000 type spray drying granulation towers, spray gun number are 14, and pressure is
1Mpa, mist projection granulating tower temperature requirement：Inlet temperature is 800 DEG C, and outlet temperature is 250 DEG C.
Specifically, the chemical composition and its weight percentage in covering slag prepared by the present invention include SiO2：33%,
CaO：27%, AL2O3：9%, MgO：0.4%, Fe2O3：0.3%, F-：5%, K2O+Na2O+Li2O：13%, C：3%.
Specifically, the viscosity that the dual alkalinity of covering slag prepared by the present invention is 0.752,1300 DEG C is 0.256Pa ﹒ s, melt
Point is 1013 DEG C.
Above example uses Comparative result with traditional protection slag：
It is shown by Statistical Comparison, the covering slag of the high grade cold rolling silicon steel of the present invention, molten steel recovery rate height, consumption per ton of steel
Consumption rate is low, surface defect of bloom incidence is low, efficiently solves the problems in high grade cold rolling silicon steel production process.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. the covering slag of high grade cold rolling silicon steel, which is characterized in that be prepared by the parts by weight of following feed components：Silicon ash
40~50 parts of stone, 10~15 parts of Fluorspar Powder, 3~5 parts of sodium fluoride, 10~15 parts of soda ash, 10~15 parts of pre- melt, ice crystal 5~
12 parts, 3~4 parts of Cabot carbon black, 1~2 part of semi-reinforcing hydrocarbon black, 3~5 parts of lithium carbonate, 2~5 parts of hydroxymethyl cellulose.
2. the covering slag of high grade cold rolling silicon steel according to claim 1, which is characterized in that by following feed components
Parts by weight are prepared：42 parts of wollastonite, 12 parts of Fluorspar Powder, 4 parts of sodium fluoride, 12 parts of soda ash, 12 parts of pre- melt, 6 parts of ice crystal,
3.5 parts of Cabot carbon black, 1.5 parts of semi-reinforcing hydrocarbon black, 4 parts of lithium carbonate, 3 parts of hydroxymethyl cellulose.
3. the covering slag of high grade cold rolling silicon steel according to claim 1, which is characterized in that each ingredient in the wollastonite
Percentage composition includes：CaO：46 ± 2%, SiO2：50 ± 2%, Fe2O3：≤ 1%, MgO：≤ 1%, the burning of the wollastonite is lost
Amount≤2.5%, water content≤0.5%, the mesh of granularity≤200.
4. the covering slag of high grade cold rolling silicon steel according to claim 1, which is characterized in that CaF in the Fluorspar Powder2's
Content >=95%, and fluorite Powder Particle Size is 200 mesh full by, content >=95% of C in ntermediate super abrasion furnace (carbon) black, C in semi-reinforcing hydrocarbon black
Content >=97%.
5. the preparation process of the covering slag of the high grade cold rolling silicon steel described in a kind of manufacturing claims 1, which is characterized in that including
Following steps：
S1. raw material preparation：All raw material sampling Detections, water content≤0.5%, the mesh of granularity≤200；
S2. dispensing：Electronic proportioning error ± 0.1Kg is carried out according to formula setting weight, is poured into batch can；
S3. siccative stirs：Material in batch can is put into mechanical agitation 15 minutes in twin-shaft mixer, is uniformly mixed；
S4. wet agitation grinding：Mixed dry material in S3 is put into levigator in mass ratio 1:1.5 addition moisture, wet stirring pulping,
Grinding takes out slurry in 45 minutes；
S5. mist projection granulating：Magma is made in S4 and is transported to mist projection granulating tower through conveyance conduit under a constant, slurry is then divided to spray
Mist granulating and drying；
S6. finished product detection is put in storage：The dry grain of detection, by the mesh of granularity >=80, the drying grain of water content≤0.5% dispenses 10kg pouches
Transhipment storage storage after sealing.
6. the preparation process of the covering slag of high grade cold rolling silicon steel according to claim 5, which is characterized in that in the S5
Granulation tower tower is：3000 type spray drying granulation towers, spray gun number are 14, pressure 1Mpa, the mist projection granulating tower
Temperature requirement：Inlet temperature >=700 DEG C, outlet temperature >=150 DEG C.
7. the preparation process of the covering slag of high grade cold rolling silicon steel according to claim 5, which is characterized in that described hair
Chemical composition and its weight percentage in the covering slag of bright preparation include SiO2：32~34%, CaO：26~28%,
AL2O3：8~10%, MgO：≤ 1%, Fe2O3≤ 1%, F-：4~6%, K2O+Na2O+Li2O：12~14%, C：2~4%.
8. the preparation process of the covering slag of high grade cold rolling silicon steel according to claim 5, which is characterized in that described hair
The viscosity that the dual alkalinity of the covering slag of bright preparation is 0.75 ± 0.05,1300 DEG C is 0.25 ± 0.09Pa ﹒ s, fusing point is 995 ±
30℃。
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112247088A (en) * | 2020-10-31 | 2021-01-22 | 江苏沙钢集团有限公司 | Silicon steel crystallizer covering slag |
| CN113322391A (en) * | 2021-05-20 | 2021-08-31 | 江西省科学院应用物理研究所 | Composite covering agent for copper-iron alloy and use method thereof |
| CN113996771A (en) * | 2021-11-12 | 2022-02-01 | 江苏嘉耐高温材料股份有限公司 | Pre-melted crystallizer casting powder for non-oriented silicon steel and preparation method thereof |
| CN114012049A (en) * | 2021-11-04 | 2022-02-08 | 江苏省沙钢钢铁研究院有限公司 | Continuous casting crystallizer casting powder for high-grade silicon steel and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112247088A (en) * | 2020-10-31 | 2021-01-22 | 江苏沙钢集团有限公司 | Silicon steel crystallizer covering slag |
| CN113322391A (en) * | 2021-05-20 | 2021-08-31 | 江西省科学院应用物理研究所 | Composite covering agent for copper-iron alloy and use method thereof |
| CN113322391B (en) * | 2021-05-20 | 2023-01-31 | 江西省科学院应用物理研究所 | Composite covering agent for copper-iron alloy and use method thereof |
| CN114012049A (en) * | 2021-11-04 | 2022-02-08 | 江苏省沙钢钢铁研究院有限公司 | Continuous casting crystallizer casting powder for high-grade silicon steel and preparation method and application thereof |
| CN113996771A (en) * | 2021-11-12 | 2022-02-01 | 江苏嘉耐高温材料股份有限公司 | Pre-melted crystallizer casting powder for non-oriented silicon steel and preparation method thereof |
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Application publication date: 20181102 |