CN109454221A - Improve the course control method for use of tundish work life - Google Patents
Improve the course control method for use of tundish work life Download PDFInfo
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- CN109454221A CN109454221A CN201811618663.4A CN201811618663A CN109454221A CN 109454221 A CN109454221 A CN 109454221A CN 201811618663 A CN201811618663 A CN 201811618663A CN 109454221 A CN109454221 A CN 109454221A
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- Prior art keywords
- tundish
- design
- control method
- work life
- variance
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
- B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
Abstract
The invention belongs to steelmaking technical fields, and in particular to a kind of course control method for use for improving tundish work life.The present invention includes Tundish Flow Field design, tundish impact area design, the resistance to material design of tundish, the control of intermediate turn-up mechanism installation standard, the design of tundish construction technology, the control of baking of tundish temperature curve.The control point of Tundish Flow Field design is as follows: under slag blocking wall+dam operating condition, the stagnation time is respectively averagely 50.439s and 67.294s under stopper and sizing nozzle operating condition, and variance is respectively 25.5928 and 33.6906；Dead zone ratio is respectively 22.675% and 22.075%, and variance is 7.4033 and 5.5901；Mean residence time is respectively 483.325s and 487.025s the invention enables tundish work life raising, reduces the influence to production process, improves product quality, reduces production cost.
Description
Technical field
The invention belongs to steelmaking technical fields, and in particular to a kind of course control method for use for improving tundish work life.
Background technique
Currently, from the point of view of national metallurgy industry, tundish work life substantially in or so twenties hours, be extremely difficult to using
Service life used safely at 60 hours or more, and liquid steel temperature is uneven in tundish, had an impact to continuous casting billet quality.Tundish makes
It is low with the service life, especially with occur in the process accident cause it is unplanned stop pouring, most of steel mill is poured time using newly opening
Or heat changes tundish to handle, and will cause the discontinuous of production in this way, easily causes the extruding of molten iron, What is more because of processing
Time of casualty is long, causes blast furnace staying, and bigger loss is brought to enterprise.
Summary of the invention
In view of the deficiencies of the prior art, the object of the present invention is to provide a kind of process control sides for improving tundish work life
Method reduces the influence to production process, improves product quality, reduce production cost so that tundish work life improves.
The course control method for use of the present invention for improving tundish work life, including Tundish Flow Field design, tundish punching
Hit area's design, the resistance to material design of tundish, the control of intermediate turn-up mechanism installation standard, the design of tundish construction technology, tundish baking
The control of roasting temperature curve.
The control point of Tundish Flow Field design is as follows:
(1) under slag blocking wall+dam operating condition, the stagnation time is averagely respectively under stopper and sizing nozzle operating condition
50.439s and 67.294s, variance are respectively 25.5928 and 33.6906；Dead zone ratio is respectively 22.675% and 22.075%,
Variance is 7.4033 and 5.5901；Mean residence time is respectively 483.325s and 487.025s；
(2) under flow straightener+dam operating condition, the stagnation time is averagely respectively under stopper and sizing nozzle operating condition
76.0425s and 107.433s, variance are respectively 69.218 and 91.9801；Dead zone ratio is respectively 34.3% and 30.625%,
Variance is 23.9747 and 32.1504；Mean residence time is respectively 410.6s and 433.575s.
The stagnation time of slag blocking wall operating condition is less than flow straightener operating condition, but variance is much smaller, illustrates each water under slag blocking wall operating condition
The molten steel temperature difference that mouth is shown in is smaller, is less prone to certain first-class temperature too low the case where causing production not can be carried out；In dead zone ratio side
Face, slag blocking wall operating condition are less than flow straightener operating condition, illustrate that the volume energy of tundish under slag blocking wall operating condition preferably uses；Flat
In terms of the equal residence time, slag blocking wall operating condition is longer than flow straightener technique, is more advantageous to the floating removal of field trash.
The present invention carries out water model test to Tundish Flow Field, and verifying influences the design of tundish metallurgy function；In
Between packet water model test search out and make the resistance to material design of reasonable tundish.
In the design of tundish impact area additional, turbulent flow suppressor is installed to impact zone position.
In the resistance to material design of tundish, flow control device is designed, installs slag blocking wall+dam additional.Temperature Distribution is more in tundish
Add the requirement for uniformly meeting continuous casting casting direct motion.Demonstrate barricade structure be it is reasonable, realize steel stream in tundish with
The preferably nowed forming purpose that flows to each flowing water mouth.
The new slag blocking wall water conservancy diversion bore dia is 100mm, left and right drift angle is 24 °, raise up 30mm, 2 stream with 3 stream, 5 stream with
Add dam, height 250mm between 6 streams；Reduce 15% or more dead zone area.Each flowing water mouth mean residence time is longer, and variance is smaller,
Four stream molten steel are relatively uniform；Dead zone ratio is respectively 6.6%, 5.7%, 8.8%, 6.5%, and mean value and variance are all smaller, entirely
Flow field is relatively active more uniform.
In the control technique of intermediate turn-up mechanism installation standard, the magnesia carbon brick of 800*800*80mm is made, according to ladle
The standard of MT14A makes, and is mounted on 8 pieces of steel face (as shown in Fig. 1) of meeting, and impact zone two sides are each 3 pieces (as shown in Fig. 2), packet
Totally 5 pieces of 2 layers of bottom, 3 pieces of overflow port lower part；It is fixed after by dress with welding anchoring piece；Permanent layer selects high alumina gravity flow pouring material,
Add amount of moisture according to 8% control；Health 7 days after permanent layer pours, process are toasted according to small fire-moderate heat-high fire sequence,
Time 108 hours, temperature-rise period was uniform, and baking temperature reaches 800 DEG C or more.
The design of tundish construction technology including the following steps:
(1) dry materials that 100+5mm is at packet bottom, sample 90 magnesia；
(2) it after packet bottom application work, hangs in mould and is positioned, controlled according to the distance 100mm to each point；
(3) in working lining fetal membrane according to the vibration motor for shaking 3 same frequencys of uniform principle installation；
(4) the dry materials mould for being included in 2/3 height shakes 15 minutes, and starting to be constructed with pneumatic pick from two sides carries out to centre,
It is made a call to 5 minutes around mould, 3 times, the dry materials flatness error after entire knotting controls within 3mm.
Increase the ladle magnesia carbon brick aggregate of 15-20wt% in the dry materials proportion；Proportion is carried out according to 4 gradating materials；
Phenolic resin is selected to make bonding agent, additional amount is the 3-5wt% of dry materials；The metallurgy lime of 5-6wt% is added into dry materials.
In the control technique of the baking of tundish temperature curve, including following control point:
(1) ready-made middle packet igniting in mould is toasted 3 hours, temperature is baked to 300-400 DEG C, reaches low-temperature sintering
Requirement；
(2) small fire toasts 1.5 hours (winter toasted according to 2 hours), temperature controlling range: opening roasting temperature to 300 DEG C, controls
Process processed uniformly heats up；
(3) moderate heat toasts 2 hours, and temperature controlling range: 300 DEG C~700 DEG C, control process uniformly heats up；
(4) high fire is toasted 1 hour, and temperature controlling range: 700 DEG C~1000 DEG C, control process uniformly heats up.
In baking process, it is ensured that each burner is vertical with baking hole centering, with middle backpack cover planar horizontal；Continuous casting special messenger is responsible for
Match fire, air distribution in baking process, controls the aperture of gas valve and air-valve in the process, fire is pressed onto middle packet, not occurred
Run impact gun fire phenomenon.Baking gear control table is shown in Table 1.
Table 1
Compared with prior art, beneficial effects of the present invention are as follows:
The present invention by Tundish Flow Field, tundish impact area, the resistance to material of tundish, intermediate turn-up mechanism install standard, in
Between packet construction technology, the comprehensively control and design of baking of tundish temperature curve so that tundish work life was by original 12 hours
50 hours or more till now are improved, the service life is wrapped in part close to 60 hours；Ton steel Contract cost is by 16.3 original yuan // ton
Steel reduces 5.73 yuan/ton of steel till now；The fuel cost wrapped in baking is reduced till now by 4.5 yuan/ton of original steel
1.2 yuan/ton of steel；Reduce the influence to production process, reduce the unplanned generation for stopping pouring accident, reduces resistance to material erosion and bring into
Field trash, reduce non-uniform temperature in tundish, the short influence to product quality of molten steel residence time in middle packet reduces
Production cost.
Detailed description of the invention
Fig. 1 is big or middle to repair castable packet baking temperature curve；
Fig. 2 is castable light maintenance packet baking temperature curve；
Fig. 3 is the curve relation figure of baking process time and temperature.
Specific embodiment
The present invention is described further with reference to embodiments.
Embodiment 1
The course control method for use of the raising tundish work life, including Tundish Flow Field design, tundish impact area is set
Meter, the resistance to material design of tundish, the control of intermediate turn-up mechanism installation standard, the design of tundish construction technology, baking of tundish temperature
The control of curve.
When Tundish Flow Field designs:
(1) under slag blocking wall+dam operating condition, the stagnation time is averagely respectively under stopper and sizing nozzle operating condition
50.439s and 67.294s, variance are respectively 25.5928 and 33.6906；Dead zone ratio is respectively 22.675% and 22.075%,
Variance is 7.4033 and 5.5901；Mean residence time is respectively 483.325s and 487.025s；
(2) under flow straightener+dam operating condition, the stagnation time is averagely respectively under stopper and sizing nozzle operating condition
76.0425s and 107.433s, variance are respectively 69.218 and 91.9801；Dead zone ratio is respectively 34.3% and 30.625%,
Variance is 23.9747 and 32.1504；Mean residence time is respectively 410.6s and 433.575s.
In the design of tundish impact area additional, turbulent flow suppressor is installed to impact zone position.
In the resistance to material design of tundish, flow control device is designed, installs slag blocking wall+dam additional.
The new slag blocking wall water conservancy diversion bore dia is 100mm, left and right drift angle is 24 °, raise up 30mm, 2 stream with 3 stream, 5 stream with
Add dam, height 250mm between 6 streams；Reduce 15% or more dead zone area.Each flowing water mouth mean residence time is longer, and variance is smaller,
Four stream molten steel are relatively uniform；Dead zone ratio is respectively 6.6%, 5.7%, 8.8%, 6.5%, and mean value and variance are all smaller, entirely
Flow field is relatively active more uniform.
In the control technique of intermediate turn-up mechanism installation standard, the magnesia carbon brick of 800*800*80mm is made, according to ladle
The standard of MT14A makes, and is mounted on 8 pieces of steel face (as shown in Fig. 1) of meeting, and impact zone two sides are each 3 pieces (as shown in Fig. 2), packet
Totally 5 pieces of 2 layers of bottom, 3 pieces of overflow port lower part；It is fixed after by dress with welding anchoring piece；Permanent layer selects high alumina gravity flow pouring material,
Add amount of moisture according to 8% control；Health 7 days after permanent layer pours.
The design of tundish construction technology including the following steps:
(1) dry materials that 100+5mm is at packet bottom, sample 90 magnesia；
(2) it after packet bottom application work, hangs in mould and is positioned, controlled according to the distance 100mm to each point；
(3) in working lining fetal membrane according to the vibration motor for shaking 3 same frequencys of uniform principle installation；
(4) the dry materials mould for being included in 2/3 height shakes 15 minutes, and starting to be constructed with pneumatic pick from two sides carries out to centre,
It is made a call to 5 minutes around mould, 3 times, the dry materials flatness error after entire knotting controls within 3mm.
Increase the ladle magnesia carbon brick aggregate of 15wt% in the dry materials proportion；Proportion is carried out according to 4 gradating materials；It selects
Phenolic resin makees bonding agent, and additional amount is the 3wt% of dry materials；The metallurgy lime of 5wt% is added into dry materials.
In the control technique of the baking of tundish temperature curve, including following control point:
(1) ready-made middle packet igniting in mould is toasted 3 hours, temperature is baked to 300 DEG C, reaches low sintering and wants
It asks；
(2) small fire is toasted 1.5 hours, temperature controlling range: opens roasting temperature to 300 DEG C, control process uniformly heats up；
(3) moderate heat toasts 2 hours, and temperature controlling range: 300 DEG C~700 DEG C, control process uniformly heats up；
(4) high fire is toasted 1 hour, and temperature controlling range: 700 DEG C~1000 DEG C, control process uniformly heats up.
Embodiment 2
The course control method for use of the raising tundish work life, including Tundish Flow Field design, tundish impact area is set
Meter, the resistance to material design of tundish, the control of intermediate turn-up mechanism installation standard, the design of tundish construction technology, baking of tundish temperature
The control of curve.
When Tundish Flow Field designs:
(1) under slag blocking wall+dam operating condition, the stagnation time is averagely respectively under stopper and sizing nozzle operating condition
50.439s and 67.294s, variance are respectively 25.5928 and 33.6906；Dead zone ratio is respectively 22.675% and 22.075%,
Variance is 7.4033 and 5.5901；Mean residence time is respectively 483.325s and 487.025s；
(2) under flow straightener+dam operating condition, the stagnation time is averagely respectively under stopper and sizing nozzle operating condition
76.0425s and 107.433s, variance are respectively 69.218 and 91.9801；Dead zone ratio is respectively 34.3% and 30.625%,
Variance is 23.9747 and 32.1504；Mean residence time is respectively 410.6s and 433.575s.
In the design of tundish impact area additional, turbulent flow suppressor is installed to impact zone position.
In the resistance to material design of tundish, flow control device is designed, installs slag blocking wall+dam additional.
The new slag blocking wall water conservancy diversion bore dia is 100mm, left and right drift angle is 24 °, raise up 30mm, 2 stream with 3 stream, 5 stream with
Add dam, height 250mm between 6 streams；Reduce 15% or more dead zone area.Each flowing water mouth mean residence time is longer, and variance is smaller,
Four stream molten steel are relatively uniform；Dead zone ratio is respectively 6.6%, 5.7%, 8.8%, 6.5%, and mean value and variance are all smaller, entirely
Flow field is relatively active more uniform.
In the control technique of intermediate turn-up mechanism installation standard, the magnesia carbon brick of 800*800*80mm is made, according to ladle
The standard of MT14A makes, and is mounted on 8 pieces of steel face of meeting, and totally 5 pieces of 2 layers of bottom, 3 pieces of overflow port lower part are wrapped in each 3 pieces of impact zone two sides；It presses
It is fixed after dress with welding anchoring piece；Permanent layer selects high alumina gravity flow pouring material, adds amount of moisture according to 8% control；Permanent layer
Health 7 days after pouring.
The design of tundish construction technology including the following steps:
(1) dry materials that 100+5mm is at packet bottom, sample 90 magnesia；
(2) it after packet bottom application work, hangs in mould and is positioned, controlled according to the distance 100mm to each point；
(3) in working lining fetal membrane according to the vibration motor for shaking 3 same frequencys of uniform principle installation；
(4) the dry materials mould for being included in 2/3 height shakes 15 minutes, and starting to be constructed with pneumatic pick from two sides carries out to centre,
It is made a call to 5 minutes around mould, 3 times, the dry materials flatness error after entire knotting controls within 3mm.
Increase the ladle magnesia carbon brick aggregate of 15-20wt% in the dry materials proportion；Proportion is carried out according to 4 gradating materials；
Phenolic resin is selected to make bonding agent, additional amount is the 5wt% of dry materials；The metallurgy lime of 6wt% is added into dry materials.
In the control technique of the baking of tundish temperature curve, including following control point:
(1) ready-made middle packet igniting in mould is toasted 3 hours, temperature is baked to 400 DEG C, reaches low sintering and wants
It asks；
(2) small fire is toasted 1.5 hours, temperature controlling range: opens roasting temperature to 300 DEG C, control process uniformly heats up；
(3) moderate heat toasts 2 hours, and temperature controlling range: 300 DEG C~700 DEG C, control process uniformly heats up；
(4) high fire is toasted 1 hour, and temperature controlling range: 700 DEG C~1000 DEG C, control process uniformly heats up.
Embodiment 3
The course control method for use of the raising tundish work life, including Tundish Flow Field design, tundish impact area is set
Meter, the resistance to material design of tundish, the control of intermediate turn-up mechanism installation standard, the design of tundish construction technology, baking of tundish temperature
The control of curve.
When Tundish Flow Field designs:
(1) under slag blocking wall+dam operating condition, the stagnation time is averagely respectively under stopper and sizing nozzle operating condition
50.439s and 67.294s, variance are respectively 25.5928 and 33.6906；Dead zone ratio is respectively 22.675% and 22.075%,
Variance is 7.4033 and 5.5901；Mean residence time is respectively 483.325s and 487.025s；
(2) under flow straightener+dam operating condition, the stagnation time is averagely respectively under stopper and sizing nozzle operating condition
76.0425s and 107.433s, variance are respectively 69.218 and 91.9801；Dead zone ratio is respectively 34.3% and 30.625%,
Variance is 23.9747 and 32.1504；Mean residence time is respectively 410.6s and 433.575s.
In the design of tundish impact area additional, turbulent flow suppressor is installed to impact zone position.
In the resistance to material design of tundish, flow control device is designed, installs slag blocking wall+dam additional.
The new slag blocking wall water conservancy diversion bore dia is 100mm, left and right drift angle is 24 °, raise up 30mm, 2 stream with 3 stream, 5 stream with
Add dam, height 250mm between 6 streams；Reduce 15% or more dead zone area.Each flowing water mouth mean residence time is longer, and variance is smaller,
Four stream molten steel are relatively uniform；Dead zone ratio is respectively 6.6%, 5.7%, 8.8%, 6.5%, and mean value and variance are all smaller, entirely
Flow field is relatively active more uniform.
In the control technique of intermediate turn-up mechanism installation standard, the magnesia carbon brick of 800*800*80mm is made, according to ladle
The standard of MT14A makes, and is mounted on 8 pieces of steel face of meeting, and totally 5 pieces of 2 layers of bottom, 3 pieces of overflow port lower part are wrapped in each 3 pieces of impact zone two sides；It presses
It is fixed after dress with welding anchoring piece；Permanent layer selects high alumina gravity flow pouring material, adds amount of moisture according to 8% control；Permanent layer
Health 7 days after pouring.
The design of tundish construction technology including the following steps:
(1) dry materials that 100+5mm is at packet bottom, sample 90 magnesia；
(2) it after packet bottom application work, hangs in mould and is positioned, controlled according to the distance 100mm to each point；
(3) in working lining fetal membrane according to the vibration motor for shaking 3 same frequencys of uniform principle installation；
(4) the dry materials mould for being included in 2/3 height shakes 15 minutes, and starting to be constructed with pneumatic pick from two sides carries out to centre,
It is made a call to 5 minutes around mould, 3 times, the dry materials flatness error after entire knotting controls within 3mm.
Increase the ladle magnesia carbon brick aggregate of 15-20wt% in the dry materials proportion；Proportion is carried out according to 4 gradating materials；
Phenolic resin is selected to make bonding agent, additional amount is the 4wt% of dry materials；The metallurgy lime of 5wt% is added into dry materials.
In the control technique of the baking of tundish temperature curve, including following control point:
(1) ready-made middle packet igniting in mould is toasted 3 hours, temperature is baked to 350 DEG C, reaches low sintering and wants
It asks；
(2) small fire is toasted 1.5 hours, temperature controlling range: opens roasting temperature to 300 DEG C, control process uniformly heats up；
(3) moderate heat toasts 2 hours, and temperature controlling range: 300 DEG C~700 DEG C, control process uniformly heats up；
(4) high fire is toasted 1 hour, and temperature controlling range: 700 DEG C~1000 DEG C, control process uniformly heats up.
The present invention by Tundish Flow Field, tundish impact area, the resistance to material of tundish, intermediate turn-up mechanism install standard, in
Between packet construction technology, the comprehensively control and design of baking of tundish temperature curve so that tundish work life was by original 12 hours
Improve till now close to 60 hours；Ton steel Contract cost is reduced 5.73 yuan/ton till now by 16.3 original yuan // ton steel
Steel；The fuel cost wrapped in baking reduces 1.2 yuan/ton of steel till now by 4.5 yuan/ton of original steel；Reduce to producing
The influence of journey reduces the unplanned generation for stopping pouring accident, reduces resistance to material and corrodes the field trash brought into, reduces temperature in tundish
Unevenly, molten steel residence time in middle packet short influence to product quality, reduces production cost.
Claims (8)
1. a kind of course control method for use for improving tundish work life, including Tundish Flow Field design, tundish impact area design, in
Between Bao Naicai design, the control of intermediate turn-up mechanism installation standard, the design of tundish construction technology, baking of tundish temperature curve
Control, it is characterised in that: the control point of Tundish Flow Field design is as follows:
(1) under slag blocking wall+dam operating condition, the stagnation time under stopper and sizing nozzle operating condition averagely be respectively 50.439s and
67.294s, variance are respectively 25.5928 and 33.6906；Dead zone ratio is respectively 22.675% and 22.075%, and variance is
7.4033 with 5.5901；Mean residence time is respectively 483.325s and 487.025s；
(2) under flow straightener+dam operating condition, the stagnation time under stopper and sizing nozzle operating condition averagely be respectively 76.0425s and
107.433s, variance are respectively 69.218 and 91.9801；Dead zone ratio is respectively 34.3% and 30.625%, and variance is
23.9747 with 32.1504；Mean residence time is respectively 410.6s and 433.575s.
2. the course control method for use according to claim 1 for improving tundish work life, it is characterised in that: tundish impact area
In design additional, turbulent flow suppressor is installed to impact zone position.
3. the course control method for use according to claim 1 for improving tundish work life, it is characterised in that: the resistance to material of tundish is set
In meter, flow control device is designed, installs slag blocking wall+dam additional.
4. the course control method for use according to claim 3 for improving tundish work life, it is characterised in that: slag blocking wall deflector hole
Diameter is 100mm, left and right drift angle is 24 °, raise up 30mm, adds dam, height 250mm between 2 streams and 3 streams, 5 streams and 6 streams；It reduces
15% or more dead zone area.
5. the course control method for use according to claim 1 for improving tundish work life, it is characterised in that: intermediate turn-up mechanism peace
In the control technique of dress standard, the magnesia carbon brick of 800*800*80mm is made, is made according to the standard of ladle MT14A, is mounted on and meets
Totally 5 pieces of 2 layers of bottom, 3 pieces of overflow port lower part are wrapped in 8 pieces of steel face, each 3 pieces of impact zone two sides；It is solid with welding anchoring piece after by dress
It is fixed；Permanent layer selects high alumina gravity flow pouring material, adds amount of moisture according to 8% control；Health 7 days after permanent layer pours.
6. the course control method for use according to claim 1 for improving tundish work life, it is characterised in that: tundish construction work
Skill design including the following steps:
(1) dry materials that 100+5mm is at packet bottom, sample 90 magnesia；
(2) it after packet bottom application work, hangs in mould and is positioned, controlled according to the distance 100mm to each point；
(3) vibration motor of 3 same frequencys is installed additional in working lining fetal membrane；
(4) the dry materials mould for being included in 2/3 height shakes 15 minutes, and starting to be constructed with pneumatic pick from two sides carries out to centre, surrounds
Mould is made a call to 5 minutes, and 3 times, the dry materials flatness error after entire knotting controls within 3mm.
7. the course control method for use according to claim 6 for improving tundish work life, it is characterised in that: in dry materials proportion
Increase the ladle magnesia carbon brick aggregate of 15-20wt%；Proportion is carried out according to 4 gradating materials；It selects phenolic resin to make bonding agent, is added
Amount is the 3-5wt% of dry materials；The metallurgy lime of 5-6wt% is added into dry materials.
8. the course control method for use according to claim 1 for improving tundish work life, it is characterised in that: baking of tundish temperature
In the control technique of line of writing music, including following control point:
(1) ready-made middle packet igniting in mould is toasted 3 hours, temperature is baked to 300-400 DEG C；
(2) small fire is toasted 1.5-2 hours, temperature controlling range: opens roasting temperature to 300 DEG C；
(3) moderate heat toasts 2 hours, temperature controlling range: 300 DEG C~700 DEG C；
(4) high fire is toasted 1 hour, temperature controlling range: 700 DEG C~1000 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811618663.4A CN109454221A (en) | 2018-12-27 | 2018-12-27 | Improve the course control method for use of tundish work life |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811618663.4A CN109454221A (en) | 2018-12-27 | 2018-12-27 | Improve the course control method for use of tundish work life |
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| CN109454221A true CN109454221A (en) | 2019-03-12 |
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| CN201811618663.4A Pending CN109454221A (en) | 2018-12-27 | 2018-12-27 | Improve the course control method for use of tundish work life |
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|---|---|
| CN (1) | CN109454221A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112250453A (en) * | 2020-10-21 | 2021-01-22 | 江西博丰耐火材料有限公司 | Dry material for continuous casting tundish working lining, construction process and continuous casting tundish working lining |
| CN114653933A (en) * | 2022-03-18 | 2022-06-24 | 山东莱钢永锋钢铁有限公司 | Production method for prolonging service life of billet continuous casting tundish |
-
2018
- 2018-12-27 CN CN201811618663.4A patent/CN109454221A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112250453A (en) * | 2020-10-21 | 2021-01-22 | 江西博丰耐火材料有限公司 | Dry material for continuous casting tundish working lining, construction process and continuous casting tundish working lining |
| CN114653933A (en) * | 2022-03-18 | 2022-06-24 | 山东莱钢永锋钢铁有限公司 | Production method for prolonging service life of billet continuous casting tundish |
| CN114653933B (en) * | 2022-03-18 | 2024-01-26 | 山东莱钢永锋钢铁有限公司 | Production method for prolonging service life of billet continuous casting tundish |
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Application publication date: 20190312 |