CN1481954A - Fluorine-free environment-friendly type continuous casting protecting slag for the blast furnace slag containing titanium and the manufacturing process of the same - Google Patents
Fluorine-free environment-friendly type continuous casting protecting slag for the blast furnace slag containing titanium and the manufacturing process of the same Download PDFInfo
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- CN1481954A CN1481954A CNA031178243A CN03117824A CN1481954A CN 1481954 A CN1481954 A CN 1481954A CN A031178243 A CNA031178243 A CN A031178243A CN 03117824 A CN03117824 A CN 03117824A CN 1481954 A CN1481954 A CN 1481954A
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Abstract
The present invention relates to steel-making crystallizer protecting dregs, and is environment protecting fluoride-free protecting dregs suitable for continuous casting of plate billet and square billet. The protecting dregs consist of sintering base material, titanium-containing blast slag, manganese ore powder, bentone, carbon black, clay shaped graphite, etc. Its production process includes the synthesis of base material and the compounding of protecting dregs. The protecting dregs may be molten in the crystallizer homogeneously to produce cast billet lubricating and heat insulating effect and has no corrosion to casting machine and no pollution to water.
Description
Technical field:
The present invention relates to continuous casting steel machine crystallizer protecting residue and manufacture method thereof, be suitable for the fluorine-free and environment-friendly covering slag that slab and billet continuous casting are used.
Background technology:
In the continuous casting technology evolution, it is very crucial that crystallizer protecting residue plays a part, and it is inseparable with the crystallizer protecting residue technology to we can say that continuous casting can reach present level.Therefore, the continuous casting covering slag technology has become the important component part of modern continuous casting technology.From the evolution of covering slag technology, its research at present and application mainly concentrate on and contain fluorine continuous casting mould fluxes.In the common continuous casting covering slag, all adding 5～15% fluoride such as fluorite, ice crystal etc., is the main source of continuous casting process fluorine.The existence of fluorine still has bad influence to continuous casting itself and conticaster equipment except that relating to the earth environment problem.Fluoride about 20～30% dissolves in the secondary cooling water in the covering slag that consumes in casting process, makes it be acid, causes the pollution and the corrosion casting machine of water, reduces the casting machine life-span.And the appearance of green metallurgical tide, the development to modern continuous casting covering slag technology has proposed new requirement undoubtedly, presses for the fluorine-free and environment-friendly continuous casting covering slag technology that adopts.
In casting process; although the crystallizer protecting residue consumption is less; be generally 0.4～0.8 kilogram of ton steel, but the effect in crystallizer is very outstanding, should possesses adiabatic heat-insulation, prevent the molten steel secondary oxidation, absorb the effect that molten steel come-up field trash, lubricated strand and control are conducted heat.Especially back two kinds of claimed slags of effect have certain crystallization ability, control the requirement of hot-fluid to satisfy the minimizing crystallizer with frictional force and different steel grade between strand, thereby reach the purpose that guarantees the continuous casting process direct motion and improve casting billet surface and subcutaneous quality.Because crystallizer needs to use cuspidine inevitably to the heat absorption control of solidified shell, so floride-free problem is never effectively solved in the continuous casting covering slag.Research and application report about floride-free covering slag are also rare, and United States Patent (USP) mainly is rheological behavior and the lubricated strand problem that solves floride-free slag, and this free-floride casting powder for continuously casting crystallizer is by Li
2O 0.5～9%, Na
2O 29～38%, and CaO 0～25%, B
2O
35～10%, SiO
238～50% form.Germany's floride-free slag of ST-H12/16-66FF is used on the billet caster, the cast hard steel, i.e. and high-carbon steel, this slag is formed and composition is: CaO 17.10%; SiO
227.30%; TiO
20.08%; MnO 0.07%; MgO 8.45%; Na
2O 11.45%; B
2O
33.40%; K
2O 0.29%; C 14.68%; Al
2O
33.6%; Fe
2O
30.55%; Other volatile matter 13.03%.Korea S Pu item steel mill is used in the floride-free slag of OA of cast mild steel on the slab caster, and the main physicochemical property of this slag is: CaO/SiO
2=0.8; B
2O
37.5%; MgO 1.6%; 976 ℃ of fusion temperatures; 1300 ℃ of following viscosity 0.20Pa.S; The crystallization ratio is zero.Existing floride-free slag has only solved the lubrication problem of covering slag in crystallizer, and the steel grade of pouring into a mould all is not strong mild steel of crack sensitivity and high-carbon steel.And on continuous casting crack sensitivity steel grade (as inferior peritectic steel), test, find that the crystallizer heat output has the fluorine covering slag to increase by 10～20%, make strand produce the exhibiting high surface longitudinal crack.Therefore, the key of developing floride-free covering slag remains the substitute of seeking cuspidine, with the heat transfer control problem of solution crystallizer, thereby satisfies the needs that different steel grades conduct heat and control the continuous casting covering slag crystallizer.
Continuous casting covering slag mainly is made up of base-material, flux and carbonaceous material three parts.Because base-material processing is allocated the different of mode into flux, and continuous casting covering slag is divided into pre-melted type and two kinds of production methods of mixed type again.So-called mixed type slag be exactly by physics method with various raw material mix, levigate, oven dry or pulping, mist projection granulating obtain, its feature is that processing is simple, cost is low, but the easy moisture absorption, raw material restricted (material crystal water and objectionable impurities etc.), segregation (inhomogeneous) easily takes place in transportation, and the big phenomenon of fractional melting and flare is arranged in the crystallizer fusion process; And the pre-melted type slag is exactly the deficiency at mixed type slag production method; adopt furnace cupola raw material and flux to be carried out fritting by synthetic method; remove volatile matter wherein; chemical reaction takes place; form the base-material of covering slag; allocate a small amount of flux, trimming and carbonaceous material on this basis into, and mix, levigate, oven dry or pulping, mist projection granulating, make the covering slag of various needs.Fritting covering slag base-material composition and percentage by weight by cupola melting are: CaO 40.46%; SiO
235.10%; MgO 6.27%; Na
2O 4.23%; K
2O 0.20%; Al
2O
35.42%; Fe
2O
30.67%; F
-7.65%, its production process is: the broken processing → batching of raw material → stirring and evenly mixing → moulding → cupola melting → cooling → Raymond mill.But at the production of floride-free covering slag, since floride-free in the covering slag, make melting charge in furnace cupola internal mobility variation, and the uneven phenomenon of fusing also appears in blanking difficulty simultaneously; Flux in the additional mixing type production method (as soda, lithium carbonate and borax) causes the problem that volatile matter is big and the crystallization shipwreck is removed in the use.Therefore, existing above-mentioned two kinds of modes of production all are not suitable for, and must seek new floride-free covering slag base-material production method.
Summary of the invention:
The objective of the invention is at above-mentioned the deficiencies in the prior art, a kind of fluorine-free and environment-friendly continuous casting covering slag and manufacture method thereof of titanium-containing blast furnace slag is provided.This covering slag also possesses the effect that control is conducted heat except possessing adiabatic heat-insulation, prevent the molten steel secondary oxidation, absorbing molten steel come-up field trash, the lubricated strand effect, has solved the crystallizer heat transfer control problem of floride-free covering slag.On the base-material production method, can avoid because fluorine-free pro-molten slag blanking difficulty, mobile poor in stove causes the uneven phenomenon of base-material fusing; Also can solve simultaneously the problem that flux in the mixed type production method in use causes the big and difficult removal of moisture of volatile matter.
For achieving the above object, technical scheme of the present invention is:
The technical scheme of this covering slag:
1) floride-free covering slag base-material synthetic raw material composition and percentage by weight are:
Lime stone 30～36%
Quartz sand 13～17%
Dolomite 25～30%
Bentonite 3～5%
Industrial soda 5～9%
Borax 10～16%;
2) the fluorine-free and environment-friendly continuous casting covering slag raw material of titanium-containing blast furnace slag composition and percentage by weight are:
Sintering base-material 40～55%
Titanium-containing blast furnace slag 12～30%
Manganese ore powder 7～12%
Quartz sand 0～8%
Wollastonite 0～12%
Industrial soda 0～5%
Lithium carbonate 0～6%
Bentonite 3～4%
Carbon black 1.5～3%
Amorphous graphite 2～16%;
Above-mentioned quartz sand, wollastonite, industrial soda and four kinds of raw materials of lithium carbonate optional as required wherein two or three.
3) the fluorine-free and environment-friendly continuous casting covering slag finished product of titanium-containing blast furnace slag composition and percentage by weight are:
CaO?????25～35％
SiO
2???22～35％
TiO
2???3～8％
MnO?????3～5％
MgO?????2～5％
Na
2O???3～8％
B
2O
3??2～6％
Li
2O???0～3％
C???????3～15％
Al
2O
3?2～6％
Fe
2O
3?1～3％
H
2O????0.2～0.5％。The manufacturing process of this covering slag: the requirement of base-material synthesis process is: the various raw materials of base-material are processed into powder respectively, and granularity is controlled at 50～100 orders; By its component and percentage by weight batching; Stirring and evenly mixing adds the water of pan feeding total amount 4～6% simultaneously, and the stirring and evenly mixing time was controlled at 20～30 minutes; Moulding was dried 5～7 days naturally; Forming blocks is placed sintering in the stove, and its temperature schedule is: from room temperature to 1190～1210 ℃, and slow fire heating 48～72 hours; Burn to 1290～1310 ℃ greatly after 48～72 hours at 1190～1210 ℃ of constant temperature, drop to 65～70% of former height up to bed depth; Ceased fire 10～12 hours, and opened fire door and naturally cool to room temperature; At last the base-material that burns till is processed into fine powder, granularity is controlled at 220～300 orders.
Finish on the synthetic basis of above-mentioned base-material, carry out the preparation of titaniferous fluorine-free and environment-friendly covering slag, its production process is: other raw material except that synthetic base-material and carbonaceous material, be processed into fine powder respectively as titanium-containing blast furnace slag, manganese ore powder etc., and granularity is controlled at 220～300 orders; Press covering slag product formula batching; Stirring and evenly mixing, the stirring and evenly mixing time was controlled at 20～30 minutes; Ball milling, the ball milling time was controlled at 60～70 minutes, to guarantee to join the even of carbon; The water mill pulping, 30～40 minutes water mill time; Mist projection granulating, granularity is controlled at 0.5～0.8mm, and moisture is controlled at 0.2～0.4%.
The synthetic raw material of base-material are: lime stone: main component is CaCO
3, in the process of sintering, calcium carbonate decomposes, and emits CO
2, remaining CaO is the main component of covering slag; Quartz sand: main component is SiO
2, be the main component that covering slag needs; Dolomite: main component is CaCO
3And MgCO
3, main component is CaO and MgO behind the sintering, MgO plays the effect of stablizing the slag performance; Bentonite: main component is SiO
2, in forming process, play binding agent; Industrial soda: main component is Na
2CO
3Decomposes becomes Na in sintering process
2O plays fluxing action; Borax: main component is Na
2O2B
2O
310H
2O, after the crystallization water is removed, B
2O
3, Na
2O plays the effect that reduces base-material viscosity and fusing point.
In the covering slag finished product production process, according to the needs of casting machine section, pulling rate and steel grade, except synthetic base-material and carbonaceous material, also with addition of a certain amount of other material.Quartz sand and wollastonite mainly are the basicity of adjusting covering slag; Soda and lithium carbonate are adjusted the fusing point and the viscosity of covering slag.
In the fluorine-free and environment-friendly covering slag, TiO
2Be a kind of important oxide, derive from and climb the steel titanium-containing blast furnace slag.Climb the steel v-ti magnetite concentrate and behind blast furnace process, obtain vanadium-bearing hot metal and titanium-containing blast furnace slag, because the TiO in the raw material
2Almost all enter the slag phase, thereby TiO in the slag
2Content reaches 22～24%, climbs steel and will discharge about 3,000,000 tons of blast furnace slags every year.Because this slag mostly is the very strong titaniferous ore of crystallinity, can not be used for the operating mine slag cement in a large number as the ordinary blast slag, and TiO
2Disperse is distributed in the multi mineral, contains 15% perovskite (CaOTiO approximately
2) crystal.Titanium-containing blast furnace slag is used for not having fluorine continuous casting mould fluxes, utilizes this slag to contain TiO
2The characteristic that crystal property is strong generates perovskite crystal and replaces cuspidine in the fluorine-containing covering slag, thereby realized the heat absorption of the effective crystallization control device of floride-free covering slag to solidified shell, satisfies the needs of different continuous casting steel grades; Also realized simultaneously the comprehensive utilization of titanium-containing blast furnace slag.Therefore added an amount of titanium-containing blast furnace slag in the covering slag of the present invention, made TiO in the covering slag
2Content is controlled in 3～8% scopes.
In the composition of covering slag, Na
2The effect of the main landing low melting temperature of O also can reduce the viscosity of slag, Na of the present invention simultaneously
2O is controlled at 3～8%.B
2O
3Be a kind of flux, it is remarkable to reducing viscosity coefficient of dross and fusion temperature effect, B
2O
3Be controlled at 2～6%.Li
2O can not only reduce viscosity coefficient of dross and fusion temperature significantly, and can also improve the greasy property of covering slag, especially high pulling rate is required low melting point and low viscous covering slag particularly suitable; Because the price height can not add low pulling rate high-melting-point and full-bodied covering slag, so Li in the covering slag of the present invention
2O content control range is 0～3%, with the form adding of lithium carbonate.A certain amount of MnO can reduce the fusion temperature and the viscosity of slag in the covering slag, and the present invention is controlled at 3～5% with it, with the form adding of manganese ore powder.Proper addition of MgO can be improved the melting characteristic and the stability of slag in covering slag, MgO of the present invention is controlled at 2～5%.Al in the covering slag
2O
3Content raises can increase the viscosity of slag, and also influence absorbs the effect that alchlor is mingled with, Al in the claimed in the present invention slag in addition
2O
3Be not more than 6%, generally be controlled at 2～6%.
The kind of charcoal and addition are very big to the melting structure and the burn-off rate influence of covering slag.Add carbon black and the amorphous graphite that contains C 3～15% in covering slag, the carbon black additional proportion is 1.5～3.0%; The amorphous graphite addition is 2～16%.Control the burn-off rate of covering slag with this as framework material, thereby guarantee that covering slag has rational melting structure, burn-off rate and slag layer thickness in crystallizer.
The present invention is compared with the prior art, and has following technique effect:
Floride-free covering slag of the present invention is applicable to slab and billet continuous casting is low, in and the high-carbon steel grade, consumption per ton of steel is 0.4～0.8 kilogram.No. 1 floride-free covering slag is used on the large square bland continuous-casting machine, cast section 250 * 280mm
2, work pulling rate 0.7m/min., cast is high, in and low-carbon (LC) three kind shaped steel, a ton steel covering slag consumption is 0.75 kilogram; No. 2 slag is used on the conventional slab caster, cast section 170 * 1200mm
2, work pulling rate 1.4m/min., cast is as the low-alloy steel of 16MnR, 0.48 kilogram of consumption per ton of steel; No. 3 slag is used on the conventional slab caster equally, cast section 240 * 1400mm
2, work pulling rate 0.75m/min., the cast steel grade is the peritectic steel (as ship steel) that is easy to generate face crack, 0.65 kilogram of consumption per ton of steel; No. 4 slag is used on the little square billet casting machine, cast section 150 * 150mm
2, work pulling rate 2.6m/min., the cast straight carbon steel, as Q235 and 20MnSi steel, 0.75 kilogram of consumption per ton of steel; No. 5 slag is used on the conventional slab caster, cast section 210 * 1200mm
2, work pulling rate 1.1m/min., the cast steel grade is mild steel (as the 08Al steel), 0.70 kilogram of consumption per ton of steel.
The physical property contrast of the floride-free covering slag of table 1 the present invention and Korea S and German slag
| Technical indicator | Viscosity (1300 ℃ of .Pa.S) | Fusion temperature (℃) | Crystallization rate (%) | Casting machine type and steel grade |
| 1 (the present invention) | ????0.55 | ????1168 | ????15.0 | Bloom, high, in and mild steel |
| 2 (the present invention) | ????0.17 | ????1124 | ????28.0 | Slab, low-alloy steel (16MnR) |
| 3 (the present invention) | ????0.30 | ????1157 | ????76.0 | Slab, middle carbon peritectic steel (ship steel) |
| 4 (the present invention) | ????0.25 | ????1146 | ????21.0 | Little square billet, medium carbon steel |
| 5 (the present invention) | ????0.21 | ????1108 | ????5.0 | Slab, mild steel |
| OA (Korea S) | ????0.20 | ????976 | ????0.0 | Slab, mild steel |
| ST-H12/16-66FF (Germany) | ????0.49 | ????1040 | ????0.0 | Square billet, high-carbon steel |
Five kinds of slags melt in crystallizer evenly, lubricate strand and high insulating effect, and flare is little, does not have caking and slagging scorification circle anomaly, and at the crystallization control device heat transfer effectively of different steel grades, cc billet surface quality is good, reaches the result of use that existing usefulness has the fluorine covering slag.From the environmental protection aspect, also having solved has the fluorine slag to cause the pollution of water and the problem of corrosion casting machine.The floride-free covering slag of this free-floride covering slag and Korea S Pu item steel mill and German usefulness relatively is shown in Table 1, and maximum characteristics are crystallization rates that different proportion is all arranged, and the crystallization control device conducts heat effectively, satisfies the needs of different steel grades (crack sensitivity difference) continuous casting.
The specific embodiment:
According to the composition range and the base-material manufacture method of the floride-free covering slag of the invention described above, five kinds of no fluorine continuous casting mould fluxes have been prepared.
Embodiment 1
The fluorine-free and environment-friendly continuous casting covering slag finished product of titanium-containing blast furnace slag is formed and percentage by weight is:
CaO???SiO
2??TiO
2?Na
2O?B
2O
3?MnO???MgO???C??????Al
2O
3?Fe
2O
3?H
2O
28.9％，33.2％，4.0％，?3.9％，?3.6％，??4.4％，?3.5％，?12.0％，?4.3％，???1.9％，??0.3％
Its raw material weight percentage consists of:
Sintering base-material titanium-containing blast furnace slag manganese ore powder wollastonite quartz sand industrial soda bentonite carbon black amorphous graphite
44％?????17％???????9％????6％????6.5％??1％??????3％????2％??11.5％
The sintering base-material raw material weight percentage that is wherein adopted consists of:
Lime stone dolomite quartz sand industrial soda borax bentonite
33％??????28％??????15％????7％???????13％??4％
This free-floride square billet covering slag production divides two steps to carry out, and comprises the synthetic of base-material and the preparation of covering slag finished product.The base-material synthesis process is: the various raw materials of base-material are processed into powder respectively, and granularity is at 60～80 orders; Prepare burden in base-material synthesis material ratio; Stirring and evenly mixing adds the water of pan feeding total amount 5%, 25 minutes stirring and evenly mixing time simultaneously; Make the brick that is of a size of 300 * 150 * 100mm (length * wide * height), dried naturally 6 days; The down-draft kiln sintering, its temperature schedule is: from room temperature to 1200 ℃, slow fire heating 65 hours; Burn to 1300 ℃ greatly after 60 hours at 1200 ℃ of constant temperature, drop to 67% of former height, cease fire up to bed depth; Ceased fire back 11 hours, and opened fire door and naturally cool to room temperature; At last the base-material that burns till is processed into fine powder, granularity is in 250～280 order scopes.Covering slag becomes process for preparation to be: other raw material except that synthetic base-material and carbonaceous material, be processed into fine powder respectively as titanium-containing blast furnace slag, manganese ore powder etc., and granularity is in 250～280 order scopes; Press covering slag product formula batching; Stirring and evenly mixing, 25 minutes stirring and evenly mixing time; Ball milling, 65 minutes ball milling time is to guarantee to join the even of carbon; The water mill pulping, 35 minutes water mill time; Mist projection granulating, finished product granularity are 0.6～0.7mm, and moisture content of finished products is 0.3%.This No. 1 floride-free covering slag is used on the large square bland continuous-casting machine, cast section 250 * 280mm
2, work pulling rate 0.7m/min., slag crystallization rate 15%, high, in and low-carbon (LC) three kind shaped steel top-pours annotate, slab quality is good.Because this slag melting point and viscosity are higher, consider cost factor, do not add lithium carbonate.
Embodiment 2
The fluorine-free and environment-friendly continuous casting covering slag finished product of titanium-containing blast furnace slag is formed and percentage by weight is:
CaO???SiO
2??TiO
2?Na
2O?B
2O
3?Li
2O?MnO???MgO???C????Al
2O
3?Fe
2O
3?H
2O
29.1％，31.8％，4.6％，?6.4％，?4.6％，??1.9％，?4.4％，?4.2％，?5.0％，4.9％，???2.8％，???0.3％
Its raw material weight percentage consists of:
Sintering base-material titanium-containing blast furnace slag manganese ore powder wollastonite industrial soda lithium carbonate bentonite carbon black amorphous graphite
52％?????19％???????8％????4％????4％??????4％????3％????2％??4％
No. 2 the used sintering base-material of slag is identical with embodiment 1, and its system slag technology is also identical with embodiment 1.No. 2 slag is used on the conventional slab caster, cast section 170 * 1200mm
2, work pulling rate 1.4m/min., the low-alloy steel of cast as 16MnR, slag crystallization rate 28% satisfies the requirement that the crystallizer strand is lubricated and conduct heat and control, cc billet surface quality is good.
Embodiment 3
The fluorine-free and environment-friendly continuous casting covering slag finished product of titanium-containing blast furnace slag is formed and percentage by weight is:
CaO???SiO
2??TiO
2?Na
2O?B
2O
3?Li
2O?MnO???MgO???C?????Al
2O
3?Fe
2O
3?H
2O
31.1％，29.2％，6.7％，?4.2％，?3.8％，??0.9％，?4.2％，?3.7％，?8.0％，?5.0％，???2.9％，???0.3％
Its raw material weight percentage consists of:
Sintering base-material titanium-containing blast furnace slag manganese ore powder wollastonite lithium carbonate bentonite carbon black amorphous graphite
46％?????28％???????9％????3％????2％????3％????2％??7％
No. 3 the used sintering base-material of slag is identical with embodiment 1, and its system slag technology is also identical with embodiment 1.No. 3 slag is used on the conventional slab caster, cast section 240 * 1400mm
2, work pulling rate 0.75m/min., the cast steel grade is the peritectic steel (as ship steel) that is easy to generate face crack, claimed slag crystallizer conducts heat little, so this slag crystallization rate maximum, up to 76%, crystallization control device heat transfer effectively, cc billet surface quality is good.
Embodiment 4
The fluorine-free and environment-friendly continuous casting covering slag finished product of titanium-containing blast furnace slag is formed and percentage by weight is:
CaO???SiO
2??TiO
2?Na
2O?B
2O
3?Li
2O?MnO???MgO???C?????Al
2O
3?Fe
2O
3?H
2O
30.8％，32.9％，4.2％，?4.1％，?4.3％，??0.5％，?3.8％，?3.8％，?8.0％，?4.8％，???2.5％，???0.3％
Its raw material weight percentage consists of:
Sintering base-material titanium-containing blast furnace slag manganese ore powder wollastonite industrial soda lithium carbonate bentonite carbon black amorphous graphite
50％?????18％???????8％????10％???1％??????1％????3％????2％??7％
No. 4 the used sintering base-material of slag is identical with embodiment 1, and its system slag technology is also identical with embodiment 1.No. 4 slag is used on the little square billet casting machine, cast section 150 * 150mm
2, work pulling rate 2.6m/min., the cast straight carbon steel, as Q235 and 20MnSi steel, claimed slag lubricate in crystallizer, also there is certain control heat-transfer capability the while, this slag crystallization rate is 21%, cc billet surface quality is good.
Embodiment 5
The fluorine-free and environment-friendly continuous casting covering slag finished product of titanium-containing blast furnace slag is formed and percentage by weight is:
CaO???SiO
2??TiO
2?Na
2O?B
2O
3?Li
2O?MnO??MgO??C????Al
2O
3?Fe
2O
3?H
2O
27.3％，34.0％，3.3％，?5.8％，?4.4％，?1.9％，?4.7％，?3.9％，7.0％，4.6％，???2.8％，???0.3％
Its raw material weight percentage consists of:
Sintering base-material titanium-containing blast furnace slag manganese ore konilite sand industrial soda lithium carbonate bentonite carbon black amorphous graphite
51％?????13％???????11％???7％????3％??????4％????3％????2％??6％
No. 5 the used sintering base-material of slag is identical with embodiment 1, and its system slag technology is also identical with embodiment 1.No. 5 slag is used on the conventional slab caster, cast section 210 * 1200mm
2, work pulling rate 1.1m/min., cast steel grade is mild steel (as the 08Al steel), this slag requirement greasy property is good, the crystallization rate is low, is 5%, cc billet surface quality is good.
Claims (8)
1. the fluorine-free and environment-friendly continuous casting covering slag of a titanium-containing blast furnace slag is characterized in that:
(1) the sintering base-material comprises following raw material and percentage by weight:
Lime stone 30～36%
Quartz sand 13～17%
Dolomite 25～30%
Bentonite 3～5%
Industrial soda 5～9%
Borax 10～16%;
(2) covering slag raw material and percentage by weight:
Sintering base-material 40～55%
Titanium-containing blast furnace slag 12～30%
Manganese ore powder 7～12%
Quartz sand 0～8%
Wollastonite 0～12%
Industrial soda 0～5%
Lithium carbonate 0～6%
Bentonite 3～4%
Carbon black 1.5～3%
Amorphous graphite 2～16%;
Above-mentioned quartz sand, wollastonite, industrial soda and four kinds of raw materials of lithium carbonate optional as required wherein two or three.
(3) this covering slag comprises following component and percentage by weight:
CaO?????25～35％
SiO
2???22～35％
TiO
2???3～8％
MnO?????3～5％
MgO?????2～5％
Na
2O???3～8％
B
2O
3??2～6％
Li
2O???0～3％
C???????3～15％
Al
2O
3?2～6％
Fe
2O
3?1～3％
H
2O???0.2～0.5％。
2. the fluorine-free and environment-friendly continuous casting covering slag of titanium-containing blast furnace slag according to claim 1 is characterized in that:
(1) the sintering base-material comprises following raw material and percentage by weight:
Lime stone 33%
Quartz sand 15%
Dolomite 28%
Bentonite 4%
Industrial soda 7%
Borax 13%;
(2) covering slag raw material and percentage by weight:
Sintering base-material 44%
Titanium-containing blast furnace slag 17%
Manganese ore powder 9%
Quartz sand 6.5%
Wollastonite 6%
Industrial soda 1%
Bentonite 3%
Carbon black 2%
Amorphous graphite 11.5%;
(3) this covering slag comprises following component and percentage by weight:
CaO??????28.9％
SiO
2????33.2％
TiO
2????4.0％
MnO??????4.4％
MgO??????3.5％
Na
2O????3.9％
B
2O
3???3.6％
C????????12.0％
Al
2O
3??4.3％
Fe
2O
3??1.9％
H
2O?????0.3％。
3. the fluorine-free and environment-friendly continuous casting covering slag of titanium-containing blast furnace slag according to claim 1 and 2 is characterized in that:
(1) covering slag raw material and percentage by weight:
Sintering base-material 52%
Titanium-containing blast furnace slag 19%
Manganese ore powder 8%
Wollastonite 4%
Industrial soda 4%
Lithium carbonate 4%
Bentonite 3%
Carbon black 2%
Amorphous graphite 4%;
(2) this covering slag comprises following component and percentage by weight:
CaO??????29.1％
SiO
2????31.8％
TiO
2????4.6％
MnO??????4.4％
MgO??????4.2％
Na
2O????6.4％
B
2O
3???4.6％
Li
2O????1.9％
C????????5.0％
Al
2O
3??4.9％
Fe
2O
3??2.8％
H
2O?????0.3％。
4. the fluorine-free and environment-friendly continuous casting covering slag of titanium-containing blast furnace slag according to claim 1 and 2 is characterized in that:
(1) covering slag raw material and percentage by weight:
Sintering base-material 46%
Titanium-containing blast furnace slag 28%
Manganese ore powder 9%
Wollastonite 3%
Lithium carbonate 2%
Bentonite 3%
Carbon black 2%
Amorphous graphite 7%;
(2) this covering slag comprises following component and percentage by weight:
CaO???????31.1％
SiO
2?????29.2％
TiO
2?????6.7％
MnO???????4.2％
MgO?????3.7％
Na
2O???4.2％
B
2O
3??3.8％
Li
2O???0.9％
C???????8.0％
Al
2O
3?5.0％
Fe
2O
3?2.9％
H
2O????0.3％。
5. the fluorine-free and environment-friendly continuous casting covering slag of titanium-containing blast furnace slag according to claim 1 and 2 is characterized in that:
(1) covering slag raw material and percentage by weight:
Sintering base-material 50%
Titanium-containing blast furnace slag 18%
Manganese ore powder 8%
Wollastonite 10%
Industrial soda 1%
Lithium carbonate 1%
Bentonite 3%
Carbon black 2%
Amorphous graphite 7%;
(2) this covering slag comprises following component and percentage by weight:
CaO??????30.8％
SiO
2????32.9％
TiO
2????4.2％
MnO??????3.8％
MgO??????3.8％
Na
2O????4.1％
B
2O
3???4.3％
Li
2O????0.5％
C????????8.0％
Al
2O
3??4.8％
Fe
2O
3??2.5％
H
2O?????0.3％。
6. the fluorine-free and environment-friendly continuous casting covering slag of titanium-containing blast furnace slag according to claim 1 and 2 is characterized in that:
(1) covering slag raw material and percentage by weight:
Sintering base-material 51%
Titanium-containing blast furnace slag 13%
Manganese ore powder 11%
Quartz sand 7%
Industrial soda 3%
Lithium carbonate 4%
Bentonite 3%
Carbon black 2%
Amorphous graphite 6%;
(2) this covering slag comprises following component and percentage by weight:
CaO?????27.3％
SiO
2???34.0％
TiO
2???3.3％
MnO?????4.7％
MgO?????3.9％
Na
2O???5.8％
B
2O
3??4.4％
Li
2O???1.9％
C???????7.0％
Al
2O
3?4.6％
Fe
2O
3?2.8％
H
2O????0.3％。
7. the manufacture craft of the fluorine-free and environment-friendly continuous casting covering slag of a titanium-containing blast furnace slag is characterized in that:
(1) base-material is synthetic
(11) the various raw materials in the base-material are processed into powder respectively, making its granularity is 50～100 orders;
(12) by its component and percentage by weight batching;
(13) batching is mixed, add the water of batching total amount 4～6% simultaneously, the stirring and evenly mixing time 20～
30 minutes;
(14) moulding was dried 5～7 days naturally;
(15) forming blocks is placed sintering in the stove, be heated to 1190～1210 ℃, slow fire heating 48～72 from room temperature
Hour, being incubated after 48～72 hours, big fire is heated to 1290～1310 ℃, up to bed depth
Drop to 65～70% of former height, ceased fire 10～12 hours, open fire door and naturally cool to the chamber
Temperature;
(16) base-material that burns till being processed into granularity is 220～300 order fine powders.
(2) this covering slag is prepared
(21) other raw material beyond synthetic base-material and the carbonaceous material being processed into granularity is that 220～300 orders are thin
Powder; By this covering slag product formula batching;
(22) mix, the stirring and evenly mixing time is 20～30 minutes;
(23) mixture behind the mixing is carried out ball milling, the ball milling time is 60～70 minutes;
(24) to its water mill, the water mill time is 30～40 minutes;
(25) mist projection granulating, granularity is 0.5～0.8mm, moisture is controlled at 0.2～0.4%.
8. the manufacture craft of titanium-containing blast furnace slag fluorine-free and environment-friendly continuous casting covering slag according to claim 7 is characterized in that:
(81) the various raw materials in the base-material are processed into powder respectively, granularity is 60～80 orders;
(82) batching is mixed, add the water of batching total amount 5% simultaneously, the stirring and evenly mixing time is 25
Minute;
(83) make the fragment of brick of 300 * 150 * 100mm, dried naturally 6 days;
(84) fragment of brick places sintering in the down-draft furnace, is heated to 1200 ℃ from room temperature, and slow fire heating 65 hours is protected
Temperature is after 60 hours, and big fire is heated to 1300 ℃, drops to 67% of former height up to bed depth,
Ceased fire 11 hours, and opened fire door and naturally cool to room temperature;
(85) it is 250～280 order fine powders that the base-material that burns till is processed into granularity;
(86) other raw material beyond synthetic base-material and the carbonaceous material being processed into granularity is that 250～280 orders are thin
Powder; Press covering slag product formula batching;
(87) mix, the stirring and evenly mixing time is 25 minutes;
(88) mixture behind the mixing is carried out ball milling, the ball milling time is 65 minutes;
(89) to its water mill, the water mill time is 35 minutes;
(810) mist projection granulating, granularity are 0.6～0.7mm, and moisture is 0.3%.
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|---|---|---|---|
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|---|---|---|---|
| CN 03117824 CN1233489C (en) | 2003-04-30 | 2003-04-30 | Fluorine-free environment-friendly type continuous casting protecting slag for the blast furnace slag containing titanium and the manufacturing process of the same |
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| Publication Number | Publication Date |
|---|---|
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| CN1233489C CN1233489C (en) | 2005-12-28 |
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| CN1298459C (en) * | 2004-04-05 | 2007-02-07 | 宝山钢铁股份有限公司 | Protective slag for continuous casting |
| CN1321764C (en) * | 2004-06-23 | 2007-06-20 | 青岛斯多伯格三一冶金材料有限公司 | Fluorine free protecting slag for steelmaking and continuous casting and method for manufacturing same |
| CN1331625C (en) * | 2005-10-05 | 2007-08-15 | 鞍山科技大学 | Method for producing high thermokeeping continuous casting protective slag |
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| CN102233414A (en) * | 2011-07-28 | 2011-11-09 | 山西太钢不锈钢股份有限公司 | High-aluminum high-manganese type nonmagnetic steel crystallizer covering slag and manufacturing method thereof |
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| CN109536734A (en) * | 2019-01-23 | 2019-03-29 | 辽宁科技大学 | A kind of environment-friendly preparation method of calcium fluoride containing ingredient pre-melted slag |
| CN111500919A (en) * | 2020-05-29 | 2020-08-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method of high-cleanliness high-titanium low-carbon steel |
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| CN101623700B (en) * | 2009-08-10 | 2011-05-18 | 广州珠江钢铁有限责任公司 | Method for producing medium-carbon steel hot-rolled steel sheet |
| CN101637809B (en) * | 2009-08-11 | 2012-05-09 | 河南省西保冶材集团有限公司 | Round billet low-carbon welding rod steel continuous casting functional protective material |
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| CN102151812A (en) * | 2010-02-11 | 2011-08-17 | 宝山钢铁股份有限公司 | Freon-free environment-friendly continuous casting slag |
| CN102059330B (en) * | 2011-02-15 | 2013-01-23 | 江苏大学 | Boron-containing fluoride-free covering slag for steel continuous-casting crystallizer and preparation method thereof |
| CN102059330A (en) * | 2011-02-15 | 2011-05-18 | 江苏大学 | Boron-containing fluoride-free covering slag for steel continuous-casting crystallizer and preparation method thereof |
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| CN109536734A (en) * | 2019-01-23 | 2019-03-29 | 辽宁科技大学 | A kind of environment-friendly preparation method of calcium fluoride containing ingredient pre-melted slag |
| CN112391541A (en) * | 2019-08-14 | 2021-02-23 | 山特维克材料技术公司 | Mold flux and method for manufacturing nickel-based alloy |
| CN111531140B (en) * | 2020-05-22 | 2022-05-24 | 攀钢集团攀枝花钢铁研究院有限公司 | High titanium oxide continuous casting covering slag for titanium-containing steel |
| CN111531140A (en) * | 2020-05-22 | 2020-08-14 | 攀钢集团攀枝花钢铁研究院有限公司 | High titanium oxide continuous casting covering slag for titanium-containing steel |
| CN111500919A (en) * | 2020-05-29 | 2020-08-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method of high-cleanliness high-titanium low-carbon steel |
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| CN113319258A (en) * | 2021-06-02 | 2021-08-31 | 中钢南京环境工程技术研究院有限公司 | Method for preparing fluorine-free continuous casting covering slag by using rear lithium battery sagger |
| CN113319258B (en) * | 2021-06-02 | 2022-11-29 | 中钢集团洛阳耐火材料研究院有限公司 | Method for preparing fluoride-free continuous casting covering slag by using used lithium battery sagger |
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Assignee: Henan xibao metallurgy meterials group co.,ltd. Assignor: Chongqing University Contract fulfillment period: 2008.10.25 to 2018.10.25 contract change Contract record no.: 2008410000084 Denomination of invention: Fluorine-free environment-friendly type continuous casting protecting slag for the blast furnace slag containing titanium and the manufacturing process of the same Granted publication date: 20051228 License type: Exclusive license Record date: 20081124 |
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