CN106270424A - A kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount - Google Patents
A kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount Download PDFInfo
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- CN106270424A CN106270424A CN201610737249.XA CN201610737249A CN106270424A CN 106270424 A CN106270424 A CN 106270424A CN 201610737249 A CN201610737249 A CN 201610737249A CN 106270424 A CN106270424 A CN 106270424A
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- covering slag
- crystallizer
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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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/055—Cooling the moulds
-
- 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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- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/168—Controlling or regulating processes or operations for adjusting the mould size or mould taper
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to casting method technical field, a kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount.Comprise the steps: that A, crystallizer are cooling water circulation to supplement, crystallizer cooling hydromining closed cycle is supplied water, in recirculated cooling water, constantly add new water, control the water temperature 25 of cooling water～32 DEG C, suspended particulate substance content≤20mg/L, sump oil content≤2mg/L, water hardness≤320mg/L；B, regulation conical degree of crystallizer, conical degree of crystallizer is adjusted to 0.6～1.0%；C, interpolation covering slag, covering slag main component prepares 29～35%SiO by following mass percent2, 1.6～6.6%Al2O3, 0.8～1.6%Fe2O3, 23～31%CaO, 0.8～4.6%MgO, 7～19%C, 6～9.6%R2O, 2.9～6.4%F and 0.3%H2O, R2O is basic anhydride.According to above-mentioned improvement wine steel crystallizer copper pipe service life averagely up to 550～600 stoves, crystallizer copper pipe steel transportation amount reaches 6000 tons/, significantly surmounts existing equipment service life.
Description
Technical field
The present invention relates to casting method technical field, a kind of continuous cast billet crystallizer copper pipe steel transportation amount that improves
Method.
Background technology
Crystallizer is the core component of continuous casting installation for casting, and crystallizer uses the copper pipe that heat conductivility is good to make, for making to pour into
Molten steel in crystallizer forms certain thickness green shell, and its inner chamber is provided with certain back draught, increases between strand and copper pipe
Frictional force so that promote molten steel flow speed to slow down to be condensed into green shell.Molten steel is owing to high temperature corrosion and flowing abrasion are it is generally required to improve
The wearability of crystallizer copper pipe, prior art can plate, in copper pipe surface, the metal Cr that one layer of wearability is good.But in actually used
Along with the increase of steel transportation amount, crystallizer copper pipe all has deformation in various degree and abrasion, current crystallizer copper pipe steel transportation amount to reach
4000 tons/, copper pipe is just it cannot be guaranteed that normally produce and scrap, and the big processing cost of copper pipe consumption is high.
Summary of the invention
The present invention solves the deficiencies in the prior art offer, and a kind of suitability is wide, processing cost is low, the raising of length in service life
The method of continuous cast billet crystallizer copper pipe steel transportation amount.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount, comprises the steps:
A, crystallizer are cooling water circulation to be supplemented
Crystallizer cooling hydromining closed cycle is supplied water, and constantly adds new water, control the water temperature of cooling water in recirculated cooling water
25～32 DEG C, suspended particulate substance content≤20mg/L, sump oil content≤2mg/L, water hardness≤320mg/L；
B, regulation conical degree of crystallizer
Conical degree of crystallizer is adjusted to 0.6～1.0%；
C, interpolation covering slag
Covering slag main component prepares 29～35%SiO by following mass percent2, 1.6～6.6%Al2O3, 0.8～1.6%
Fe2O3, 23～31%CaO, 0.8～4.6%MgO, 7～19%C, 6～9.6%R2O, 2.9～6.4%F and 0.3%H2O, R2O is alkalescence
Oxide.
The recirculated cooling water of described step A or new water add corrosion inhibiting and descaling agent.
The conical degree of crystallizer of described step B is divided into straight carbon steel tapering 0.6%～0.9%, high-carbon steel tapering 0.7%～0.9%, low
Carbon steel tapering 0.8%～1.0%.
The R of described step C2O is respectively Na2O and K2O etc..
In described step C, covering slag is divided into straight carbon steel covering slag, high-carbon steel covering slag and low-carbon steel protecting slag, and straight carbon steel is protected
Protect slag main component and prepare 29.35%SiO by following mass percent2、5.11%Al2O3、1.56%Fe2O3、30.32%CaO、
1.77%MgO、7.34%C、9.59%R2O, 6.34%F and 0.3%H2O；High-carbon steel covering slag main component presses following mass percent
Preparation 34.68%SiO2、1.62%Al2O3、0.87%Fe2O3、23.53%CaO、0.83%MgO、18.6%C、9.11%R2O、5.29%F
And 0.3%H2O；Low-carbon steel protecting slag main component prepares 29.29%SiO by following mass percent2、6.57%Al2O3、1.59%
Fe2O3、26.41%CaO、4.58%MgO、11.17%C、6.72%R2O, 2.95%F and 0.3%H2O。
0.2-0.3Kg is added during covering slag usage amount is molten steel per ton in described step C.
In described step C, straight carbon steel covering slag fusing point is 1100-1110 ° of C, and high-carbon steel covering slag fusing point is 1110-1120 °
C, low-carbon steel protecting slag fusing point is 1165-1175 ° of C.
In described step C, the basicity R value of straight carbon steel covering slag is 0.9-0.92, and the basicity R value of high-carbon steel covering slag is
0.63-0.65, basicity R of low-carbon steel protecting slag is 0.84-0.86.
The invention have the benefit that
1, recirculated water is continuously replenished new water and corrosion inhibiting and descaling agent, controls water temperature, suspended particulate substance content and sump oil content, improve
Circulating water effect, the green shell of preparation same thickness, crystallizer cooling water usage amount is reduced to 130t/h by 150t/h.
2, being optimized crystallizer quality of cooling water, the circulating cooling water hardness is reduced to 320mg/L by 450mg/L, it is to avoid
Water hardness is too high, causes crystallizer copper pipe outer wall fouling, promotes copper pipe service life.
3, according to steel grade solidification shrinkage characteristic, crystallizer copper pipe back draught is optimized, crystallizer copper pipe back draught
General by each steel grade of traditional 0.3%～1.2%, it is adjusted to straight carbon steel copper pipe back draught 0.6%～0.9%, high-carbon steel copper pipe back taper
Degree 0.7%～0.9%, mild steel copper pipe back draught 0.8%～1.0%." point steel grade, reference cone degree " realizes Precise control, effectively drops
Copper pipe and the frictional resistance of green shell in low process of billet withdrawal.
4, according to steel grade solidification shrinkage characteristic, covering slag is added the indexs such as fashionable liquid steel temperature, basicity, consumption and has carried out excellent
Changing, covering slag is divided into straight carbon steel covering slag, high-carbon steel covering slag and low-carbon steel protecting slag three by " the special steel of covering slag is special "
Kind, improve covering slag using effect, promote different steel grade purity.Slag interface is clear, and in molten steel, field trash reduces.
In sum, according to above-mentioned improvement wine steel crystallizer copper pipe service life averagely up to 550～600 stoves, crystallizer
Copper pipe steel transportation amount reaches 6000 tons/, significantly surmounts existing equipment service life.
Detailed description of the invention
A kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount, comprises the steps:
A, crystallizer are cooling water circulation to be supplemented
Crystallizer cooling hydromining closed cycle is supplied water, and constantly adds new water, control the water temperature of cooling water in recirculated cooling water
25～32 DEG C, suspended particulate substance content≤20mg/L, sump oil content≤2mg/L, water hardness≤320mg/L, described step A
Recirculated cooling water or new water add corrosion inhibiting and descaling agent；
B, regulation conical degree of crystallizer
Conical degree of crystallizer is adjusted to 0.6～1.0%；Preferably conical degree of crystallizer is divided into straight carbon steel tapering 0.6%～0.9%, high-carbon steel
Tapering 0.7%～0.9%, mild steel tapering 0.8%～1.0%.
C, interpolation covering slag
Covering slag main component prepares 29～35%SiO by following mass percent2, 1.6～6.6%Al2O3, 0.8～1.6%
Fe2O3, 23～31%CaO, 0.8～4.6%MgO, 7～19%C, 6～9.6%R2O, 2.9～6.4%F and 0.3%H2O, R2O is alkalescence
Oxide, R2O is respectively Na2O and K2O etc.；
Covering slag also can be subdivided into straight carbon steel covering slag, high-carbon steel covering slag and low-carbon steel protecting slag, and straight carbon steel covering slag is main
Composition prepares 29.35%SiO by following mass percent2、5.11%Al2O3、1.56%Fe2O3、30.32%CaO、1.77%MgO、
7.34%C、9.59%R2O, 6.34%F and 0.3%H2O；High-carbon steel covering slag main component prepares 34.68% by following mass percent
SiO2、1.62%Al2O3、0.87%Fe2O3、23.53%CaO、0.83%MgO、18.6%C、9.11%R2O, 5.29%F and 0.3%H2O；
Low-carbon steel protecting slag main component prepares 29.29%SiO by following mass percent2、6.57%Al2O3、1.59%Fe2O3、26.41%
CaO、4.58%MgO、11.17%C、6.72%R2O, 2.95%F and 0.3%H2O。
0.2-0.3Kg is added during covering slag usage amount is molten steel per ton in described step C.Straight carbon steel covering slag fusing point is
1100-1110 ° of C, high-carbon steel covering slag fusing point is 1110-1120 ° of C, and low-carbon steel protecting slag fusing point is 1165-1175 ° of C.General carbon
The basicity R value of steel covering slag is 0.9-0.92, and the basicity R value of high-carbon steel covering slag is 0.63-0.65, the alkali of low-carbon steel protecting slag
Degree R value is 0.84-0.86.
Embodiment 1
A kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount, comprises the steps:
A, crystallizer are cooling water circulation to be supplemented
Crystallizer cooling hydromining closed cycle is supplied water, and constantly adds new water, control the water temperature of cooling water in recirculated cooling water
25～32 DEG C, suspended particulate substance content≤20mg/L, sump oil content≤2mg/L, water hardness≤320mg/L, described step A
Recirculated cooling water or new water add corrosion inhibiting and descaling agent；
B, regulation conical degree of crystallizer
Conical degree of crystallizer is divided into straight carbon steel tapering 0.6%, high-carbon steel tapering 0.7%, mild steel tapering 0.8%；
C, interpolation covering slag
Covering slag also can be subdivided into straight carbon steel covering slag, high-carbon steel covering slag and low-carbon steel protecting slag, and straight carbon steel covering slag is main
Composition prepares 29.35%SiO by following mass percent2、5.11%Al2O3、1.56%Fe2O3、30.32%CaO、1.77%MgO、
7.34%C、9.59%R2O, 6.34%F and 0.3%H2O, remaining is trace element and impurity；High-carbon steel covering slag main component is by such as
Lower mass percent preparation 34.68%SiO2、1.62%Al2O3、0.87%Fe2O3、23.53%CaO、0.83%MgO、18.6%C、
9.11%R2O, 5.29%F and 0.3%H2O, remaining is trace element and impurity；Low-carbon steel protecting slag main component presses following quality hundred
Proportion by subtraction preparation 29.29%SiO2、6.57%Al2O3、1.59%Fe2O3、26.41%CaO、4.58%MgO、11.17%C、6.72%R2O、
2.95%F and 0.3%H2O, remaining is trace element and impurity.
0.2Kg is added during covering slag usage amount is molten steel per ton in described step C.Straight carbon steel covering slag fusing point is 1100 °
C, high-carbon steel covering slag fusing point is 1110 ° of C, and low-carbon steel protecting slag fusing point is 1165 ° of C.The basicity R value of straight carbon steel covering slag is
0.9, the basicity R value of high-carbon steel covering slag is 0.63, and the basicity R value of low-carbon steel protecting slag is 0.84.
Embodiment 2
A kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount, comprises the steps:
A, crystallizer are cooling water circulation to be supplemented
Crystallizer cooling hydromining closed cycle is supplied water, and constantly adds new water, control the water temperature of cooling water in recirculated cooling water
25～32 DEG C, suspended particulate substance content≤20mg/L, sump oil content≤2mg/L, water hardness≤320mg/L, described step A
Recirculated cooling water or new water add corrosion inhibiting and descaling agent；
B, regulation conical degree of crystallizer
Preferably conical degree of crystallizer is divided into straight carbon steel tapering 0.9%, high-carbon steel tapering 0.9%, mild steel tapering 1.0%；
C, interpolation covering slag
Covering slag also can be subdivided into straight carbon steel covering slag, high-carbon steel covering slag and low-carbon steel protecting slag, and straight carbon steel covering slag is main
Composition prepares 29.35%SiO by following mass percent2、5.11%Al2O3、1.56%Fe2O3、30.32%CaO、1.77%MgO、
7.34%C、9.59%R2O, 6.34%F and 0.3%H2O；High-carbon steel covering slag main component prepares 34.68% by following mass percent
SiO2、1.62%Al2O3、0.87%Fe2O3、23.53%CaO、0.83%MgO、18.6%C、9.11%R2O, 5.29%F and 0.3%H2O；
Low-carbon steel protecting slag main component prepares 29.29%SiO by following mass percent2、6.57%Al2O3、1.59%Fe2O3、26.41%
CaO、4.58%MgO、11.17%C、6.72%R2O, 2.95%F and 0.3%H2O。
0.3Kg is added during covering slag usage amount is molten steel per ton in described step C.Straight carbon steel covering slag fusing point is 1110 °
C, high-carbon steel covering slag fusing point is 1120 ° of C, and low-carbon steel protecting slag fusing point is 1175 ° of C.The basicity R value of straight carbon steel covering slag is
0.92, the basicity R value of high-carbon steel covering slag is 0.65, and the basicity R value of low-carbon steel protecting slag is 0.86.
Embodiment 3
A kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount, comprises the steps:
A, crystallizer are cooling water circulation to be supplemented
Crystallizer cooling hydromining closed cycle is supplied water, and constantly adds new water, control the water temperature of cooling water in recirculated cooling water
25～32 DEG C, suspended particulate substance content≤20mg/L, sump oil content≤2mg/L, water hardness≤320mg/L, described step A
Recirculated cooling water or new water add corrosion inhibiting and descaling agent；
B, regulation conical degree of crystallizer
Conical degree of crystallizer is divided into straight carbon steel tapering 0.7%, high-carbon steel tapering 0.8%, mild steel tapering 0.9%；
C, interpolation covering slag
Covering slag also can be subdivided into straight carbon steel covering slag, high-carbon steel covering slag and low-carbon steel protecting slag, and straight carbon steel covering slag is main
Composition prepares 29.35%SiO by following mass percent2、5.11%Al2O3、1.56%Fe2O3、30.32%CaO、1.77%MgO、
7.34%C、9.59%R2O, 6.34%F and 0.3%H2O；High-carbon steel covering slag main component prepares 34.68% by following mass percent
SiO2、1.62%Al2O3、0.87%Fe2O3、23.53%CaO、0.83%MgO、18.6%C、9.11%R2O, 5.29%F and 0.3%H2O；
Low-carbon steel protecting slag main component prepares 29.29%SiO by following mass percent2、6.57%Al2O3、1.59%Fe2O3、26.41%
CaO、4.58%MgO、11.17%C、6.72%R2O, 2.95%F and 0.3%H2O。
0.2-0.3Kg is added during covering slag usage amount is molten steel per ton in described step C.Straight carbon steel covering slag fusing point is
1105 ° of C, high-carbon steel covering slag fusing point is 1115 ° of C, and low-carbon steel protecting slag fusing point is 1170 ° of C.Basicity R of straight carbon steel covering slag
Value is 0.91, and the basicity R value of high-carbon steel covering slag is 0.64, and the basicity R value of low-carbon steel protecting slag is 0.85.
Crystallizer copper pipe service life of embodiment 1 and 2 is averagely up to 550～600 stoves after testing, and crystallizer copper pipe crosses steel
Amount all more than 6000 tons/, embodiment 3 crystallizer copper pipe reaches 680 service life, and square blank crystallizer copper pipe steel transportation amount reaches
The high life of more than 8000 tons.
Claims (8)
1. the method improving continuous cast billet crystallizer copper pipe steel transportation amount, it is characterised in that comprise the steps:
A, crystallizer are cooling water circulation to be supplemented
Crystallizer cooling hydromining closed cycle is supplied water, and constantly adds new water, control the water temperature of cooling water in recirculated cooling water
25～32 DEG C, suspended particulate substance content≤20mg/L, sump oil content≤2mg/L, water hardness≤320mg/L；
B, regulation conical degree of crystallizer
Conical degree of crystallizer is adjusted to 0.6～1.0%；
C, interpolation covering slag
Covering slag main component prepares 29～35%SiO by following mass percent2, 1.6～6.6%Al2O3, 0.8～1.6%
Fe2O3, 23～31%CaO, 0.8～4.6%MgO, 7～19%C, 6～9.6%R2O, 2.9～6.4%F and 0.3%H2O, R2O is alkalescence
Oxide.
2. require a kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount described in 1 according to power, it is characterised in that institute
State in the recirculated cooling water of step A or new water and add corrosion inhibiting and descaling agent.
3. require a kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount described in 1 according to power, it is characterised in that institute
The conical degree of crystallizer stating step B is divided into straight carbon steel tapering 0.6%～0.9%, high-carbon steel tapering 0.7%～0.9%, mild steel tapering
0.8%～1.0%.
4. require a kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount described in 1 according to power, it is characterised in that institute
State the R of step C2O is respectively Na2O and K2O。
5. require a kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount described in 4 according to power, it is characterised in that institute
Stating covering slag in step C and be divided into straight carbon steel covering slag, high-carbon steel covering slag and low-carbon steel protecting slag, straight carbon steel covering slag mainly becomes
Divide and prepare 29.35%SiO by following mass percent2、5.11%Al2O3、1.56%Fe2O3、30.32%CaO、1.77%MgO、7.34%
C、9.59%R2O, 6.34%F and 0.3%H2O；High-carbon steel covering slag main component prepares 34.68%SiO by following mass percent2、
1.62%Al2O3、0.87%Fe2O3、23.53%CaO、0.83%MgO、18.6%C、9.11%R2O, 5.29%F and 0.3%H2O；Mild steel
Covering slag main component prepares 29.29%SiO by following mass percent2、6.57%Al2O3、1.59%Fe2O3、26.41%CaO、
4.58%MgO、11.17%C、6.72%R2O, 2.95%F and 0.3%H2O。
6. require a kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount described in 5 according to power, it is characterised in that institute
State during covering slag usage amount is molten steel per ton in step C and add 0.2-0.3Kg.
7. require a kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount described in 5 according to power, it is characterised in that institute
Stating straight carbon steel covering slag fusing point in step C is 1100-1110 ° of C, and high-carbon steel covering slag fusing point is 1110-1120 ° of C, and mild steel is protected
Protecting slag melting point is 1165-1175 ° of C.
8. require a kind of method improving continuous cast billet crystallizer copper pipe steel transportation amount described in 5 according to power, it is characterised in that institute
Stating basicity R value 0.9-0.92 of straight carbon steel covering slag in step C, the basicity R value of high-carbon steel covering slag is 0.63-0.65, low-carbon (LC)
The basicity R value of steel covering slag is 0.84-0.86.
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Application publication date: 20170104 |