CN105601275A - Manufacture process of immersive elongated-nozzle zirconia flow control - Google Patents
Manufacture process of immersive elongated-nozzle zirconia flow control Download PDFInfo
- Publication number
- CN105601275A CN105601275A CN201610018958.2A CN201610018958A CN105601275A CN 105601275 A CN105601275 A CN 105601275A CN 201610018958 A CN201610018958 A CN 201610018958A CN 105601275 A CN105601275 A CN 105601275A
- Authority
- CN
- China
- Prior art keywords
- zirconia
- particle
- flow control
- control part
- gained
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
-
- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
-
- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/636—Polysaccharides or derivatives thereof
- C04B35/6365—Cellulose or derivatives thereof
-
- 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
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
-
- 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
- C04B2235/3213—Strontium oxides or oxide-forming salts thereof
-
- 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
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/401—Alkaline earth metals
-
- 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
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/404—Refractory metals
-
- 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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The invention provides a manufacture process of an immersive elongated-nozzle zirconia flow control, comprising the following steps: 1), mixing and grinding raw materials; 2), making the materials into blanks; 3), firing; 4) preparing particles; 5), removing iron; 6), preparing powder; 7), mixing semi-finished products; 8), granulating; 9), forming under high pressure; 10), drying; 11) charging into a kiln; 12), sintering at high temperature; 13) emptying the kiln; 14), inspecting and packaging to obtain finished products. The immersive elongated-nozzle zirconia flow control manufactured by using the process has high normal-temperature pressure resistance, good thermal shock stability and good scour resistance, zirconium product cracks are effectively reduced, product quality is guaranteed, and the life of each product is prolonged.
Description
Technical field
The invention belongs to zirconium product production and processing technical field, particularly, relate to the control of a kind of immersion long nozzle zirconiaThe manufacturing process of stream part.
Background technology
The zirconium product using is at present all that use electric smelting stabilizing zirconia is primary raw material, adds a small amount of electric smelting monocline oxygenChange zirconium or desiliconization zirconia, compressing, the stability of this method product is poor, and cold crushing strength is low, and service lifeShort. Existing zirconium product structure is single, although increased titanium dioxide, calcium oxide etc., has increased certain stability, itsMechanical strength is poor, and wearability is inadequate, and a little less than scour resistance, thermal shock resistance is poor. In addition, owing to not removing in technical processThe step of impurity, makes product impurity content high, affects the quality of product.
To this, the following patent documentation of domestic main existence at present:
Patent publication No.: CN104876596A, discloses a kind of preparation method and equipment of zirconium oxide metering nozzle, the methodComprise that carrying out mist projection granulating in connection with agent and powder obtains particle, particle is carried out in conjunction with again and separate obtaining blank, willThe blank obtaining, through ageing, dehydration, compressing, is fired and is obtained zirconium oxide metering nozzle at 1710～1720 DEG C;Described powder comprises PSZ, monoclinic zirconia, and PSZ and monoclinic zirconia amount ratio are (50～60): (40～50); Described bonding agent is magnesia gel, and the addition of magnesia gel is additional 6%～9%; Pass throughIt is compressing with blank that suspended state circulation prilling makes ceramic mould zirconium oxide metering nozzle, and its bulk density is than common increasingWet prilling improves 4% left and right, and the finished product porosity reduces by 75% left and right, and can reach more than 36 hours service life. But this is specialProfit still fails to avoid the combination of stabilizing zirconia and monoclinic zirconia, still there will be mechanical strength poor, and wearability is inadequate,A little less than scour resistance, the particularly poor drawback of thermal shock resistance.
Summary of the invention
For solving the problem of above-mentioned existence, the object of the present invention is to provide a kind of immersion long nozzle zirconia flow control partManufacturing process, the immersion long nozzle zirconia flow control part that adopts described technique to make, cold crushing strength is high, thermal shock is stableProperty good, scour resistance is good, effectively reduces zirconium product cracking, ensures product quality, promotes finished product service life.
For achieving the above object, technical scheme of the present invention is:
A manufacturing process for immersion long nozzle zirconia flow control part, comprises the steps:
1) the mixing grinding of raw material: taking zirconium dioxide, basic magnesium carbonate and strontium oxide strontia as raw material, mix grinding obtains fine powder in ball mill;
2) raw material base: in step 1) add bonding agent in gained fine powder, to stir, compacting, obtains raw material base substrate;
3) burn till: by step 2) gained raw material base substrate put into cellar for storing things stove, sintering obtains sintered body, 1300 ~ 1400 DEG C of firing temperatures,Insulation 9 ~ 12h, total firing time 40 ~ 50h;
4) prepare particle: by step 3) fragmentation of gained sintered body, roll, sieve and to obtain particle, collection granularity is 0.21 ~ 0.8mmAnd granularity is less than the particle of 0.21mm;
5) deironing: process with the particle that acid is 0.21 ~ 0.8mm to granularity, and washing and drying obtains particle A, with acid to grainDegree is less than the particle of 0.21mm to be processed, and washing and drying obtains particle B;
6) preparing powder: by step 5) gained particle B wears into powder, and the particle B of 90wt% obtains powder by 400 eye mesh screens screeningsMaterial B;
7) half product is mixing: by step 5) add step 6 in the particle A of 50 ~ 60wt% of gained) powder material B of gained 40 ~ 50wt%And batching A, stirring 30 ~ 40min, the sieve aperture specification of sieving is 10 orders, ageing mixture obtains batch mixing C for 10 hours above;
8) granulation: by step 7) gained batch mixing C is pressed into base substrate C, pulverizes, and cross the screening of 2.5mm sieve and obtain batch mixing D;
9) high-pressure molding: pressing step 8) gained batch mixing D, obtain ring-type base substrate D;
10) dry: gained ring-type base substrate D is packed in drying box, be warming up to 160 ~ 170 DEG C, dry, 4 ~ 8 DEG C of heating rates/Hour, be incubated 8 ~ 10 hours, weight-loss ratio 2.0 ~ 2.5%;
11) loading of kiln: dried ring-type base substrate D is built to dress loading of kiln, build dress height 30 ~ 40cm;
12) high temperature sintering: be heated to 1700 ~ 1750 DEG C of kiln temperatures, 30 ~ 40 DEG C/h of heating rates, burn till, and burn tillTime 70-75 hour, burns till rear insulation 10 hours, cooling 86 ~ 96 hours;
13) kiln discharge: in the time that furnace temperature is cooled to 400 DEG C, wicket is opened, in the time that furnace temperature drops to 200 DEG C, kiln car is pulled out to burner hearthBlock fire door with asbestos shingle outward;
14) inspection, packaging, described immersion long nozzle zirconia flow control part finished product.
Further, step 1) each constituent mass mark is in described raw material: zirconium dioxide: 83 ~ 87%, basic magnesium carbonate: 12~ 14%, strontium oxide strontia: 1 ~ 3%.
Again, step 1) described in the mix grinding time be 14 ~ 16 hours, gained fine powder ratio of grinding media to material is 2:1, fine powder fineness requirementThe fine powder of 95wt% is by 400 eye mesh screens.
Separately, step 2) the described bonding agent chemical paste that is 2.5 ~ 3%.
Separately have, described chemical paste is formed by carboxymethyl cellulose and water modulation, the mass ratio of carboxymethyl cellulose and waterFor 1:10.
Again, step 5) described in acid be 15% hydrochloric acid, described deironing flow process is: particle soaks at least 12 little in 15% hydrochloric acidTime, deionized water rinsing 2 times is dried at least 12 hours at 120 DEG C.
Having again step 7) described batching A is 5 ~ 15% magnesium zirconium powders and 2.5 ~ 4% phenolic resins.
And, step 11), step 12), step 13) described in kiln be 0.5m3Elevator furnace.
Separately, step 14) gained immersion long nozzle zirconia flow control part finished product density is 4.6 ~ 4.9g/cm3, normal temperature is withstand voltage150~250Mpa。
Wherein, step 1) mix grinding processing intent be ensure mix. Step 2) middle interpolation bonding agent, and employingizationLearn paste as bonding agent, object is to increase the intensity of obtained raw material base substrate. Step 5) in adopt 15% hydrochloric acid carry out picklingProcess, object is to remove the impurity in particle, especially ferro element impurity. Step 6) be to burn till intensity in order to improve. Step7) adding batching A is in order to ensure compact density, and makes the contraction of base substrate C intensity be controlled at 6 ~ 8%, wherein, passes through set-up procedure7) addition of powder material B and magnesium zirconium powder in, i.e. capable of regulating contractibility.
Beneficial effect of the present invention is:
The present invention in technological process, adds basic magnesium carbonate and strontium oxide strontia can strengthen zirconic stability, and productCold crushing strength, thermal shock resistance, scour resistance are significantly increased. The batching A increasing in mixing process can ensure intoType density, blank strength also make product contraction be controlled at 6 ~ 8%, produce by the addition capable of regulating of adjusting powder material B and magnesium zirconium powderProduct shrinkage factor, and removed unnecessary impurity (especially ferro element impurity) by deironing step in this technique, effectively subtractFew zirconium product cracking, has ensured the quality of product, the prepared ring-type zirconia of the present invention flow control part on immersion long nozzle,Not only make immersion long nozzle greatly improve service life, also the synchronous tundish work life using is utilized effectively, andObviously and effective all the time, the life-span has obviously been reduced steel-making cost more than being increased to 23 stoves from 18 stoves to flow control effect, has promoted warpJi benefit.
Detailed description of the invention
Following examples are used for illustrating the present invention, but can not be used for limiting the scope of the invention.
Embodiment 1:
A manufacturing process for immersion long nozzle zirconia flow control part, described process flow steps is:
1) the raw material grinding of mixing: the zirconium dioxide that is 85% by mass fraction, 12% basic magnesium carbonate and 3% strontium oxide strontia mix grindingWithin 14 hours, obtain fine powder; Fine powder ratio of grinding media to material 2:1, the fine powder of fine powder fineness requirement 95wt% is by 400 eye mesh screens;
2) raw material base: add 2.5% chemical paste in above-mentioned fine powder, described chemical paste is carboxymethyl cellulose and waterModulation forms, and wherein, the mass ratio of carboxymethyl cellulose and water is 1:10, and with mixer stirring, is pressed into former in mouldMaterial base body;
3) burn till: raw material base substrate is put into cellar for storing things stove, burn till at 1350 DEG C, be incubated 9 hours, total firing time is to obtain for 45 hoursSintered body;
4) particle preparation: successively with the broken crusher machine of jaw, twin rollers roll, screening machine screening processes and obtains not sintered bodyWith the particle of particle diameter, collect the particle of 0.21mm-0.8mm granularity and the particle of the following granularity of 0.21mm;
5) deironing: the particle of 0.21mm-0.8mm granularity is processed with 15% hydrochloric acid, it is 12 little that particle soaks in 15% hydrochloric acidTime, deionized water rinsing 2 times, the dry particle A that obtains for 12 hours at 120 DEG C, with 15% hydrochloric acid to granularity lower than 0.21mmGrain is processed, and particle soaks 15 hours in 15% hydrochloric acid, deionized water rinsing 2 times, dry obtaining for 15 hours at 120 DEG CParticle B;
6) preparation: particle B is worn into powder with ball mill, require the powder of 90wt% by 400 eye mesh screens, obtain powder material B;
7) mixing: by adding 40% powder material B and 5% magnesium zirconium powder and 2.5% phenolic resins in 60% particle A, to stir 40 minutes, sieveSieve aperture specification is 10 orders, and ageing mixture obtains batch mixing C for 10 hours above
8) granulation: batch mixing C is pressed into base substrate C, pulverizes base substrate C, crosses 2.5mm sieve screening with screening machine with twin rollers with hydraulic pressObtain batch mixing D;
9) high-pressure molding: installation mold, with press, batch mixing to be suppressed and obtained ring-type base substrate D, density is 4.1g/cm3, surfaceSmooth, there is no layering, crackle, unfilled corner and fall limit;
10) dry: shape base substrate D is packed in drying box, 5 DEG C/h of drying and warning speed, 160 DEG C are incubated 9 hours, weight-loss ratio2.0%, obtain sheet-shaped blank D;
11) loading of kiln: ring-type base substrate D is built and is housed in together, be highly controlled at 38cm;
12) high temperature sintering: 30 DEG C/h of heating rates in kiln, 1720 DEG C are burnt till, and are incubated 10 hours, and firing time 70 hours is coldBut 90 hours;
13) kiln discharge: stop, after heating, in the time that furnace temperature drops to 400 DEG C, wicket being opened, in the time that furnace temperature drops to 200 DEG C again, can be byOutside kiln car pull-out burner hearth, block fire door with asbestos shingle;
14) inspection, sampling experiment carries out the heat 1100 DEG C of water-cooleds of shaking and does not rupture for 3 times and be qualified, and packaging gets final product to obtain the long water of immersionMouth zirconia flow control part finished product, finished product density is 4.70g/cm3, in checkout procedure, normal temperature compression resistance is 200MPa.
Wherein, described step 11), 12), 13) in kiln be 0.5m3Elevator furnace.
Embodiment 2:
A technological process for immersion long nozzle zirconia flow control part, described process flow steps is:
1) the raw material grinding of mixing: be 87% zirconium dioxide, 12% basic magnesium carbonate and 1% yttrium oxide mix grinding 16 by mass fractionHour obtain fine powder, described fine powder ratio of grinding media to material 2:1, fine powder fineness 95% is by 400 orders;
2) raw material base: adding 3% chemical paste, described chemical paste in above-mentioned fine powder is that carboxymethyl cellulose and water are adjustedSystem forms, and wherein, the mass ratio of carboxymethyl cellulose and water is 1:10, and with mixer stirring, is pressed into raw material in mouldBase substrate;
3) burn till: raw material base substrate is put into cellar for storing things stove, burn till at 1400 DEG C, be incubated 10 hours, total firing time is to obtain for 50 hoursTo sintered body;
4) particle preparation: successively with the broken crusher machine of jaw, twin rollers roll, screening machine screening processes and obtains not sintered bodyWith the particle of particle diameter, collect the particle of 0.21-0.8mm granularity and the particle of the following granularity of 0.21mm;
5) deironing: with 15% hydrochloric acid, the particle of 0.21 ~ 0.8mm granularity is processed, particle soaks 14 hours in 15% hydrochloric acid,Deionized water rinsing 2 times, dryly at 120 DEG C obtains particle A for 14 hours, with 15% hydrochloric acid to granularity the particle lower than 0.21mmProcess, particle soaks 13 hours in 15% hydrochloric acid, deionized water rinsing 2 times, dry obtain for 13 hours at 120 DEG CGrain B;
6) preparation: particle B is worn into powder with ball mill, require the powder of 90wt% by 400 eye mesh screens, obtain powderB；
7) mixing: by adding 40% powder material B and 15% magnesium zirconium powder and 3.5% phenolic resins in 60% particle A, to stir mistake 30 minutesSieve sieve aperture specification is 10 orders, and ageing mixture obtains batch mixing C for 10 hours above;
8) granulation: batch mixing C is pressed into base substrate C, pulverizes base substrate C, crosses 2.5mm sieve screening with screening machine with twin rollers with hydraulic pressObtain batch mixing D;
9) high-pressure molding: annular die is installed, with high pressure press, batch mixing D is suppressed and obtains ring-type base substrate D, density is4.25g/cm3, smooth surface is smooth, there is no layering, crackle, unfilled corner and fall limit;
10) dry: ring-type base substrate D is packed in drying box, 6 DEG C/h of drying and warning speed, 160 DEG C are incubated 8 hours, weightlessnessRate, 2.5%, obtains ring-type base substrate D;
11) loading of kiln: ring-type base substrate D is built to dress, be highly controlled at 30cm;
12) high temperature sintering: 40 DEG C/h of heating rates in kiln, 1750 DEG C are burnt till, and are incubated 10 hours, and firing time 75 hours is coldBut 96 hours;
13) kiln discharge: stop, after heating, in the time that furnace temperature drops to 400 DEG C, wicket being opened, in the time that furnace temperature drops to 200 DEG C again, can be byOutside kiln car pull-out burner hearth, block fire door with asbestos shingle;
14) inspection, sampling experiment carries out the heat 1100 DEG C of water-cooleds of shaking and does not rupture for 3 times and be qualified, and packaging gets final product to obtain the long water of immersionMouth zirconia flow control part finished product, finished product density is 4.9g/cm3, in checkout procedure, can compression resistance be 250MPa.
Wherein, described step 11), 12), 13) in kiln be 0.5m3Elevator furnace.
Embodiment 3:
A technological process for immersion long nozzle zirconia flow control part, described process flow steps is:
1) the raw material grinding of mixing: be 83% zirconium dioxide, 14% basic magnesium carbonate and 3% yttrium oxide mix grinding 15 by mass fractionHour obtain fine powder, described fine powder ratio of grinding media to material 2:1, fine powder fineness 95% is by 400 orders;
2) raw material base: add 2.8% chemical paste in above-mentioned fine powder, described chemical paste is carboxymethyl cellulose and waterModulation forms, and wherein, the mass ratio of carboxymethyl cellulose and water is 1:10, and with mixer stirring, is pressed into former in mouldMaterial base body;
3) burn till: raw material base substrate is put into cellar for storing things stove, burn till at 1350 DEG C, be incubated 12 hours, total firing time is to obtain for 50 hoursTo sintered body;
4) particle preparation: successively with the broken crusher machine of jaw, twin rollers roll, screening machine screening processes and obtains not sintered bodyWith the particle of particle diameter, collect the particle of 0.21-0.8mm granularity and the particle of the following granularity of 0.21mm;
5) deironing: with 15% hydrochloric acid, the particle of 0.21 ~ 0.8mm granularity is processed, particle soaks 16 hours in 15% hydrochloric acid,Deionized water rinsing 2 times, dryly at 120 DEG C obtains particle A for 16 hours, with 15% hydrochloric acid to granularity the particle lower than 0.21mmProcess, particle soaks 15 hours in 15% hydrochloric acid, deionized water rinsing 2 times, dry obtain for 15 hours at 120 DEG CGrain B;
6) preparation: particle B is worn into powder with ball mill, require the powder of 90wt% by 400 eye mesh screens, obtain powderB；
7) mixing: by adding 50% powder material B and 5% magnesium zirconium powder and 4% phenolic resins in 60% particle A, stir 35 minutes, sieve sievesHole gauge lattice are 10 orders, and ageing mixture obtains batch mixing C for 10 hours above;
8) granulation: batch mixing C is pressed into base substrate C, pulverizes base substrate C, crosses 2.5mm sieve screening with screening machine with twin rollers with hydraulic pressObtain batch mixing D;
9) high-pressure molding: annular die is installed, with high pressure press, batch mixing D is suppressed and obtains ring-type base substrate D, density is4.25g/cm3, smooth surface is smooth, there is no layering, crackle, unfilled corner and fall limit;
10) dry: ring-type base substrate D is packed in drying box, 8 DEG C/h of drying and warning speed, 170 DEG C are incubated 8 hours, weightlessnessRate, 4%, obtains ring-type base substrate D;
11) loading of kiln: ring-type base substrate D is built to dress, be highly controlled at 40cm;
12) high temperature sintering: 40 DEG C/h of heating rates in kiln, 1700 DEG C are burnt till, and are incubated 10 hours, and firing time 70 hours is coldBut 86 hours;
13) kiln discharge: stop, after heating, in the time that furnace temperature drops to 400 DEG C, wicket being opened, in the time that furnace temperature drops to 200 DEG C again, can be byOutside kiln car pull-out burner hearth, block fire door with asbestos shingle;
14) inspection, sampling experiment carries out the heat 1100 DEG C of water-cooleds of shaking and does not rupture for 3 times and be qualified, and packaging gets final product to obtain the long water of immersionMouth zirconia flow control part finished product, finished product density is 4.60g/cm3, in checkout procedure, normal temperature compression resistance is 150MPa.
Wherein, described step 11), 12), 13) in kiln be 0.5m3Elevator furnace.
The performance test data that in embodiment 1 ~ 3, the zirconia flow control part of preparation carries out for immersion long nozzle asUnder:
The manufacturing process of a kind of immersion long nozzle zirconia flow control part provided by the present invention is added alkali formula in technological processMagnesium carbonate and strontium oxide strontia can strengthen zirconic stability, and the cold crushing strength of product, thermal shock resistance, antiscourPerformance is significantly increased. The batching A increasing in mixing process can ensure compact density, blank strength and make product shrink controlBuilt in 6 ~ 8%, by adjusting the addition capable of regulating contractibility of powder material B and magnesium zirconium powder, and walk by deironing in this techniqueSuddenly remove unnecessary impurity (especially ferro element impurity), effectively reduced zirconium product cracking, ensured the quality of product, thisInvent prepared ring-type zirconia flow control part on immersion long nozzle, not only make immersion long nozzle service life greatlyImprove, also the synchronous tundish work life using is utilized effectively, and flow control effect obviously and effective all the time, and the life-span is from 18More than stove is increased to 23 stoves, obviously reduce steel-making cost, promoted economic benefit.
It should be noted that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described. Although referenceGood embodiment has been described in detail the present invention, and those of ordinary skill in the art should be appreciated that can be to the technology of inventionScheme is modified or is equal to replacement, and does not depart from the scope of technical solution of the present invention, and it all should be encompassed in power of the present inventionIn profit claimed range.
Claims (9)
1. a manufacturing process for immersion long nozzle zirconia flow control part, is characterized in that, comprises the steps:
The mixing grinding of raw material: taking zirconium dioxide, basic magnesium carbonate and strontium oxide strontia as raw material, mix grinding obtains fine powder in ball mill;
Raw material base: in step 1) add bonding agent in gained fine powder, to stir, compacting, obtains raw material base substrate;
Burn till: by step 2) gained raw material base substrate put into cellar for storing things stove, sintering obtains sintered body, 1300 ~ 1400 DEG C of firing temperatures, protectTemperature 9 ~ 12h, total firing time 40 ~ 50h;
Prepare particle: by step 3) fragmentation of gained sintered body, roll, sieve and to obtain particle, collect granularity and be 0.21 ~ 0.8mm withAnd granularity is less than the particle of 0.21mm;
Deironing: process with the particle that acid is 0.21 ~ 0.8mm to granularity, and washing and drying obtains particle A, with acid to granularityThe particle that is less than 0.21mm is processed, and washing and drying obtains particle B;
Preparing powder: by step 5) gained particle B wears into powder, and the particle B of 90wt% obtains powder by 400 eye mesh screens screeningsB；
Half product is mixing: by step 5) add step 6 in the particle A of 50 ~ 60wt% of gained) powder material B of gained 40 ~ 50wt% withAnd batching A, stirring 30 ~ 40min, the sieve aperture specification of sieving is 10 orders, ageing mixture obtains batch mixing C for 10 hours above;
Granulation: by step 7) gained batch mixing C is pressed into base substrate C, pulverizes, and cross the screening of 2.5mm sieve and obtain batch mixing D;
High-pressure molding: pressing step 8) gained batch mixing D, obtain ring-type base substrate D;
Dry: gained ring-type base substrate D is packed in drying box, be warming up to 160 ~ 170 DEG C, dry, 4 ~ 8 DEG C/h of heating rates,Be incubated 8 ~ 10 hours, weight-loss ratio 2.0 ~ 2.5%;
Loading of kiln: dried ring-type base substrate D is built to dress loading of kiln, build dress height 30 ~ 40cm;
High temperature sintering: be heated to 1700 ~ 1750 DEG C of kiln temperatures, 30 ~ 40 DEG C/h of heating rates, burn till firing time70-75 hour, burns till rear insulation 10 hours, cooling 86 ~ 96 hours;
Kiln discharge: in the time that furnace temperature is cooled to 400 DEG C, wicket is opened, in the time that furnace temperature drops to 200 DEG C, kiln car is pulled out outside burner hearth, useAsbestos shingle blocks fire door;
Inspection, packaging, described immersion long nozzle zirconia flow control part finished product.
2. the manufacturing process of a kind of immersion long nozzle zirconia flow control part according to claim 1, is characterized in that, stepRapid 1) in described raw material, each constituent mass mark is: zirconium dioxide: 83 ~ 87%, and basic magnesium carbonate: 12 ~ 14%, strontium oxide strontia: 1 ~ 3%.
3. the manufacturing process of a kind of immersion long nozzle zirconia flow control part according to claim 1, is characterized in that, stepRapid 1) the mix grinding time described in is 14 ~ 16 hours, and gained fine powder ratio of grinding media to material is 2:1, and the fine powder of fine powder fineness requirement 95wt% passes through400 eye mesh screens.
4. the manufacturing process of a kind of immersion long nozzle zirconia flow control part according to claim 1, is characterized in that, stepRapid 2) chemical paste that described bonding agent is 2.5 ~ 3%.
5. the manufacturing process of a kind of immersion long nozzle zirconia flow control part according to claim 4, is characterized in that instituteState chemical paste and formed by carboxymethyl cellulose and water modulation, the mass ratio of carboxymethyl cellulose and water is 1:10.
6. the manufacturing process of a kind of immersion long nozzle zirconia flow control part according to claim 1, is characterized in that, stepRapid 5) acid described in is 15% hydrochloric acid, and described deironing flow process is: particle soaks at least 12 hours in 15% hydrochloric acid, deionized water punchingWash 2 times, at 120 DEG C, be dried at least 12 hours.
7. the manufacturing process of a kind of immersion long nozzle zirconia flow control part according to claim 1, is characterized in that, stepRapid 7) described batching A is 5 ~ 15% magnesium zirconium powders and 2.5 ~ 4% phenolic resins.
8. the manufacturing process of a kind of immersion long nozzle zirconia flow control part according to claim 1, is characterized in that, stepRapid 11), step 12), step 13) described in kiln be 0.5m3Elevator furnace.
9. the manufacturing process of a kind of immersion long nozzle zirconia flow control part according to claim 1, is characterized in that, stepRapid 14) gained immersion long nozzle zirconia flow control part finished product density is 4.6 ~ 4.9g/cm3, normal temperature is withstand voltage 150 ~ 250Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610018958.2A CN105601275A (en) | 2016-01-13 | 2016-01-13 | Manufacture process of immersive elongated-nozzle zirconia flow control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610018958.2A CN105601275A (en) | 2016-01-13 | 2016-01-13 | Manufacture process of immersive elongated-nozzle zirconia flow control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105601275A true CN105601275A (en) | 2016-05-25 |
Family
ID=55981707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610018958.2A Pending CN105601275A (en) | 2016-01-13 | 2016-01-13 | Manufacture process of immersive elongated-nozzle zirconia flow control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105601275A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112142478A (en) * | 2019-06-28 | 2020-12-29 | 比亚迪股份有限公司 | Zirconia ceramic powder, zirconia ceramic, preparation method of zirconia ceramic and electronic equipment shell |
| CN115231931A (en) * | 2022-07-20 | 2022-10-25 | 郑州振中电熔新材料有限公司 | Method for manufacturing high-quality zirconia water gap by using magnesium-zirconium eutectic material and monoclinic zirconia |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101952220A (en) * | 2008-02-18 | 2011-01-19 | 耐火材料知识产权有限两合公司 | Refractory slag band |
| CN103193494A (en) * | 2013-04-15 | 2013-07-10 | 太仓宏达俊盟新材料有限公司 | Technological process for preparation of converter sliding plate inlaid zirconium product |
| CN103193481A (en) * | 2013-04-15 | 2013-07-10 | 太仓宏达俊盟新材料有限公司 | Preparation method of zirconium oxide product |
-
2016
- 2016-01-13 CN CN201610018958.2A patent/CN105601275A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101952220A (en) * | 2008-02-18 | 2011-01-19 | 耐火材料知识产权有限两合公司 | Refractory slag band |
| CN103193494A (en) * | 2013-04-15 | 2013-07-10 | 太仓宏达俊盟新材料有限公司 | Technological process for preparation of converter sliding plate inlaid zirconium product |
| CN103193481A (en) * | 2013-04-15 | 2013-07-10 | 太仓宏达俊盟新材料有限公司 | Preparation method of zirconium oxide product |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112142478A (en) * | 2019-06-28 | 2020-12-29 | 比亚迪股份有限公司 | Zirconia ceramic powder, zirconia ceramic, preparation method of zirconia ceramic and electronic equipment shell |
| CN112142478B (en) * | 2019-06-28 | 2022-06-10 | 比亚迪股份有限公司 | Zirconia ceramic powder, zirconia ceramic, preparation method of zirconia ceramic and electronic equipment shell |
| CN115231931A (en) * | 2022-07-20 | 2022-10-25 | 郑州振中电熔新材料有限公司 | Method for manufacturing high-quality zirconia water gap by using magnesium-zirconium eutectic material and monoclinic zirconia |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102381882B (en) | Zirconium oxide refractory with homogeneous micro-crystallized structure and preparation method thereof | |
| CN103242035B (en) | Method for improving appearance quality of inertial porcelain ball | |
| CN104944930B (en) | A kind of fire resistant sagger and preparation method thereof | |
| CN109970436A (en) | Industrial alumina powder substitutes the formula and its preparation method and application of high-quality calcined bauxite in powder dry production pillar porcelain insulator | |
| CN101786867A (en) | Preparation method for zirconium silicate ball | |
| CN106747594A (en) | A kind of preparation method of light microporous magnesia raw material | |
| CN103833392A (en) | Preparation method for sintered corundum | |
| CN105601275A (en) | Manufacture process of immersive elongated-nozzle zirconia flow control | |
| CN106636627B (en) | A method of producing clinker and oxide pellet | |
| CN103100648B (en) | A kind of method of the plant ash casting sand that adulterates | |
| CN111393174A (en) | Method for manufacturing M47 refractory material by using fly ash | |
| CN103521683A (en) | Anti-sticky calcium carbonate molding sand and preparation method thereof | |
| CN104496432A (en) | Preparation method of modified sintered corundum | |
| CN104609870A (en) | Preparation method of porous brick | |
| CN106396696B (en) | The preparation method of mullite spherical shape aggregate enhancing refractory material | |
| CN109400108A (en) | A kind of preparation method of light, and high-strength fly-ash haydite | |
| CN103193494B (en) | Technological process for preparation of converter sliding plate inlaid zirconium product | |
| CN107243634A (en) | A kind of preparation method of porous metal material | |
| CN111393176A (en) | Production method of novel composite corundum brick for blast furnace | |
| CN103936440A (en) | Preparation method of sintered corundum with good wear resistance | |
| CN110963790A (en) | Foaming ceramic plate produced without foaming agent and method | |
| CN108529673A (en) | The method for producing zirconium dioxide nanometer powder using zirconium dioxide sintering waste material | |
| CN104261846B (en) | A kind of manufacture method of zirconium white horizontal casting separating ring | |
| CN103145373B (en) | Injection molded aggregate for high-frequency magnetic core and preparation method of aggregate | |
| CN104148368B (en) | Wollastonite mine tailing after acidifying |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160525 |
|
| RJ01 | Rejection of invention patent application after publication |