CN105689648B - Exothermic riser casting sand mo(u)ld of the fused alumina zirconia without shrinkage cavity brick - Google Patents
Exothermic riser casting sand mo(u)ld of the fused alumina zirconia without shrinkage cavity brick Download PDFInfo
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- CN105689648B CN105689648B CN201610209237.XA CN201610209237A CN105689648B CN 105689648 B CN105689648 B CN 105689648B CN 201610209237 A CN201610209237 A CN 201610209237A CN 105689648 B CN105689648 B CN 105689648B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
Abstract
Sand mo(u)ld is cast the present invention relates to exothermic riser of the fused alumina zirconia without shrinkage cavity brick, can effectively solve fused alumina zirconia without feeding effect in shrinkage cavity brick casting cycle it is undesirable the problem of, technical scheme is, a kind of exothermic riser casting sand mo(u)ld of fused alumina zirconia without shrinkage cavity brick, including rising head sand mold body, described rising head sand mold body is insulation surface layer from outside to inside, heat preservation layer and insulation internal layer, Totally enclosed heat-preserving rising head sand mould structure novel and unique advantages of simple of the present invention, pass through the improvement to rising head sand mold body structure, it is allowed to the fused cast refractories solution after casting and slows down radiating rate, ensure liquid time lengthening, it is allowed to better heat preservation, pyrosol radiating rate is slower, pyrosol is allowed to have time enough to carry out feeding to brick body, so that tank block unit weight substantially increases, improve the interior quality of tank block, and greatly reduce production cost, remarkable in economical benefits.
Description
Technical field
The present invention relates to Corhart Zac-block rising head sand mo(u)ld, exothermic riser casting of particularly a kind of fused alumina zirconia without shrinkage cavity brick
Sand mo(u)ld.
Background technology
Zirconia-corundum refractory brick China develop tens years, its cast sand mold raw material be all using silica sand as main material, plus
Enter the production that waterglass or resin carry out sand mold sand mo(u)ld for bonding agent, the resistance to elevated temperatures and thermal resistance effect of silica sand are more adapted to
Made in fused cast refractories sand mo(u)ld, along with its aboundresources, the low advantage of cost is still the preferred material of fused cast refractories sand mo(u)ld so far
Material.
The service life of float glass furnace is average at 8 years or so at present, and being averaged for horse shoe flame domestic glass kiln is used
Life-span, the tank block of glass furnace was the key position of glass furnace service life at 5 years or so, right from industry development angle
Current glass furnace service life has higher requirement.External float glass furnace service life has reached 12 years, horse
Hoof flame domestic glass kiln service life can reach 8 years, and we have a certain distance under contrast.Observation finds domestic multiple electricity
The tank block internal structure of Rong Zhuan manufacturers has individual common trait:The blank brick of tank block forward solves plane together with rising head, finds
Internal crystalline phase segregation is serious, although fused cast refractories crystalline phase segregation is the feature of fused cast refractories, but segregation excessively seriously just has influence on electric smelting
The service life of brick.Data is shown:After fused cast refractories production casting, high-temp liquid is in sand mo(u)ld, and indissoluble material zirconium composition is moved out
Dynamic rapid crystallization, meltable material is inwardly moved, due to zirconium composition proportion between fused cast refractories silicon/aluminium/zirconium maximum, zirconium under Action of Gravity Field
Composition is moved down simultaneously.Here it is the segregation phenomena of fused cast refractories.Because pool wall turns rising head partial volume more than brick body volume, rising head with
Brick body coupling part is a thermal center point, and liquation setting rate is very fast, and rising head inner melt is formed after solidification to brick body feeding
Access denial.This is tank block crystalline phase macrosegregation the biggest factor.As shown in figure 1, tank block is shown together with the planing surface of rising head
Four regions：Empty conveyor zones A, rising head and the half dense area B of brick body junction on rising head top, brick body centre position are dredged
Loose area C, brick body bottommost dense area D.The half dense area formation of rising head and brick body connecting portion is because of pyrosol herein
Setting rate is too fast to be caused, and emitting intraoral solution solidify herein after cannot be unimpeded to the passage of brick body feeding.In the middle of brick body
Puffs be fused cast refractories interior quality defect, in glass furnace in use, glass metal corrodes the puffs arrived in the middle of brick body
Afterwards, it will the puffs position of accelerated erosion tank block, when the middle part of certain block tank block is loose serious, setting causes glass
Liquid excessive erosion, the security incident for occurring glass metal leakage, in order that glass furnace increases the service life, avoided because in tank block
The loose security incident effectively caused in portion, the internal defect defect of tank block is suddenly waited to improve, the solution of tank block internal defect problem
There is decisive meaning certainly to fused cast refractories manufacturer, to the development of glass production producer.
The content of the invention
For above-mentioned situation, to overcome the defect of prior art, the purpose of the present invention is just to provide a kind of fused alumina zirconia without contracting
The exothermic riser casting sand mo(u)ld of hole brick, can effectively solve fused alumina zirconia and ask without feeding effect is undesirable in shrinkage cavity brick casting cycle
Topic.
The technical scheme that the present invention is solved is that a kind of exothermic riser of fused alumina zirconia without shrinkage cavity brick casts sand mo(u)ld, including rising head
Sand mold body, described rising head sand mold body is insulation surface layer, heat preservation layer and insulation internal layer from outside to inside.
A kind of exothermic riser of fused alumina zirconia without shrinkage cavity brick casts the preparation method of sand mo(u)ld, and exothermic riser casting sand mo(u)ld includes emitting
Mouth sand mold body, rising head sand mold body is bolted together by polylith sand plate and constituted, and the preparation method of every block of sand plate includes following step
Suddenly：
A, make sand board mold, sand board mold be by be stacked from bottom to top insulation surface layer mold, heating protect
The hollow structure for the upper opening that warm layer mold and insulation internal layer mold are constituted, insulation surface layer mold is passed through on side
The first loose-leaf and heat preservation layer mold be connected, heat preservation layer mold is configured the second of the positive offside of the first loose-leaf
Loose-leaf is connected with insulation internal layer mold, constitutes end to end convertible movable three link configuration；
B, making insulation surface layer dispensing, insulation surface layer dispensing is by percentage by weight meter：Silica sand 50%, floating bead 45%,
What modified water glass 4%, curing agent 1% was made, wherein silica sand, floating bead, modified water glass and curing agent are stirred in mixer
Mix 2.5-3.5 minutes, produce；
C, successively will be incubated internal layer mold, heat preservation layer mold from insulation surface layer mold upper oral part open,
The insulation surface layer dispensing made is filled to insulation surface layer mold, compacting；
D, making heat preservation layer dispensing, heat preservation layer dispensing is by percentage by weight meter：Aluminum shot 18%, iron oxide
Powder 6%, floating bead 64%, modified water glass 10%, what curing agent 2% was made, wherein by aluminum shot, brown iron oxide, floating bead, modified water
Glass and curing agent are stirred 2.5-3.5 minutes in mixer, are produced；
E, by heat preservation layer mold upset be superimposed upon again insulation surface layer mold upper oral part, while will insulation in
The upper oral part of layer mold from heat preservation layer mold is opened, and the heat preservation made layer dispensing is filled to heat preservation
In layer mold, compacting；
F, making insulation internal layer dispensing, insulation internal layer dispensing is by percentage by weight meter：Silica sand 50%, floating bead 45%,
What modified water glass 4%, curing agent 1% was made, wherein silica sand, floating bead, modified water glass and curing agent are stirred in mixer
Mix 2.5-3.5 minutes, produce；
G, by be incubated internal layer mold upset be superimposed upon insulation surface layer mold upper oral part, by the insulation internal layer made
Dispensing is filled to insulation internal layer mold, compacting, and form removal produces sand plate after standing 24 hours；
H, the surface for being incubated internal layer in sand plate apply the thick barrier coatings of 3mm, stand more than three days；
I, the sand plate made in step H is bolted together by the structure of rising head, and produced with conventional binder bonding
Rising head sand mold body.
Barrier coating in described step H is by being applied to the subbing of sand plate insulation internal layer surface and being applied to bottom
The investment precoat composition of layer surface；
Described subbing includes the component of percentage by weight meter：First compo 50%, water 50%；Wherein, institute
The first compo stated includes the component of percentage by weight meter：Graphite powder 93%, ice crystal 4%, bentonite 3%；Specific system
Preparation Method is：Graphite powder, ice crystal, bentonite are mixed, the first compo is obtained, then the first compo is added
Enter in water and be well mixed, produce；
Described investment precoat includes the component of percentage by weight meter：Second compo 66%, water 34%；Wherein, institute
The second compo stated includes the component of percentage by weight meter：Alumina powder 90%, ice crystal 4.5%, brown iron oxide
1.5%th, bentonite 1%, xanthans 3%；Specifically preparation method is：By alumina powder, ice crystal, brown iron oxide, bentonite and
Xanthans is mixed, and obtains the second compo, then the second compo is added to the water well mixed, is produced；
Described subbing and the thickness of investment precoat are 1.5mm.
In use, rising head sand mold body is assembled on brick body sand mold, the infraoral of rising head sand mold body is upper with brick body sand mold
Oral area is just right, and fused cast refractories casting liquid enters from the upper oral part of rising head sand mold body.
Totally enclosed heat-preserving rising head sand mould structure novel and unique advantages of simple of the present invention, by changing to rising head sand mold body structure
It is kind, it is allowed to the fused cast refractories solution after casting and slows down radiating rate, it is ensured that liquid time lengthening, is allowed to better heat preservation, high temperature
Solution radiating rate is slower, allows pyrosol to have time enough to carry out feeding to brick body, so that tank block unit weight substantially increases
Plus, the interior quality of tank block is improved, and greatly reduce production cost, remarkable in economical benefits.
Brief description of the drawings
Fig. 1 is the sectional front view that existing tank block rising head sand mold makes, and its kind of A, B, C, D represent tank block together with rising head
Section shows 4 regions.
Fig. 2 is front view of the invention.
Fig. 3 is the partial sectional view of rising head sand mold body of the present invention.
Fig. 4 is the sectional view of use state of the present invention.
Fig. 5 is the front view of sand board mold of the present invention.
Fig. 6 is the top view of sand board mold of the present invention.
Fig. 7 is incubated the stereogram of surface layer mold for the present invention.
Embodiment
The embodiment of the present invention is described in further detail below in conjunction with accompanying drawing.
As shown in figures 2-6, the present invention includes rising head sand mold body 1, and described rising head sand mold body 1 is insulation face from outside to inside
Layer 1a, heat preservation layer 1b and insulation internal layer 1c.
To ensure using effect, described insulation surface layer 1a thickness is 10mm, and heat preservation layer 1b thickness is 20mm,
The thickness for being incubated internal layer 1c is 10mm；
During described rising head sand mold body 1 is the upper and lower opening being made up of the straight length 11 on top and the reducer 12 of bottom
Hollow structure, the big opening end of reducer 12 is connected with the infraoral of straight length 11；
Described rising head sand mold body 1 is arranged on brick body sand mold 2, and brick body sand mold 2 is the hollow structure of upper opening, in it
Chamber constitutes the molding space of brick body, and the inner chamber of rising head sand mold body 1 constitutes the feeding space of brick body, the infraoral and brick of reducer 12
The upper oral part of body sand mold 2 is just right；
A kind of exothermic riser of fused alumina zirconia without shrinkage cavity brick casts the preparation method of sand mo(u)ld, and exothermic riser casting sand mo(u)ld includes emitting
Mouth sand mold body, rising head sand mold body is bolted together by polylith sand plate and constituted, and the preparation method of every block of sand plate includes following step
Suddenly：
A, make sand board mold, sand board mold be by be stacked from bottom to top insulation surface layer mold 3a, heating
The hollow structure for the upper opening that heat-insulation layer mold 3b and insulation internal layer mold 3c are constituted, insulation surface layer mold 3a is through dress
The first loose-leaf 4a on side is connected with heat preservation layer mold 3b, and heat preservation layer mold 3b is configured to live first
Second loose-leaf 4b of the positive offside of page is connected with insulation internal layer mold 3c, constitutes end to end convertible movable three connecting plates knot
Structure；
B, making insulation surface layer dispensing, insulation surface layer dispensing is by percentage by weight meter：Silica sand 50%, floating bead 45%,
What modified water glass 4%, curing agent 1% was made, wherein silica sand, floating bead, modified water glass and curing agent are stirred in mixer
Mix 2.5-3.5 minutes, produce；
C, successively will be incubated internal layer mold, heat preservation layer mold from insulation surface layer mold upper oral part open,
The insulation surface layer dispensing made is filled to insulation surface layer mold, compacting；
D, making heat preservation layer dispensing, heat preservation layer dispensing is by percentage by weight meter：Aluminum shot 18%, iron oxide
Powder 6%, floating bead 64%, modified water glass 10%, what curing agent 2% was made, wherein by aluminum shot, brown iron oxide, floating bead, modified water
Glass and curing agent are stirred 2.5-3.5 minutes in mixer, are produced；
E, by heat preservation layer mold upset be superimposed upon again insulation surface layer mold upper oral part, while will insulation in
The upper oral part of layer mold from heat preservation layer mold is opened, and the heat preservation made layer dispensing is filled to heat preservation
In layer mold, compacting；
F, making insulation internal layer dispensing, insulation internal layer dispensing is by percentage by weight meter：Silica sand 50%, floating bead 45%,
What modified water glass 4%, curing agent 1% was made, wherein silica sand, floating bead, modified water glass and curing agent are stirred in mixer
Mix 2.5-3.5 minutes, produce；
G, by be incubated internal layer mold upset be superimposed upon insulation surface layer mold upper oral part, by the insulation internal layer made
Dispensing is filled to insulation internal layer mold, compacting, and form removal produces sand plate after standing 24 hours；
H, the surface for being incubated internal layer in sand plate apply the thick barrier coatings of 3mm, stand more than three days；
I, the sand plate made in step H is bolted together by the structure of rising head, and produced with conventional binder bonding
Rising head sand mold body.
In use, rising head sand mold body is assembled on brick body sand mold, the infraoral of rising head sand mold body is upper with brick body sand mold
Oral area is just right, and fused cast refractories casting liquid enters from the upper oral part of rising head sand mold body.
Barrier coating in described step H is by being applied to the subbing of sand plate insulation internal layer surface and being applied to bottom
The investment precoat composition on coating surface；
Described subbing includes the component of percentage by weight meter：First compo 50%, water 50%；Wherein, institute
The first compo stated includes the component of percentage by weight meter：Graphite powder 93%, ice crystal 4%, bentonite 3%；Specific system
Preparation Method is：Graphite powder, ice crystal, bentonite are mixed, the first compo is obtained, then the first compo is added
Enter in water and be well mixed, produce；
Described investment precoat includes the component of percentage by weight meter：Second compo 66%, water 34%；Wherein, institute
The second compo stated includes the component of percentage by weight meter：Alumina powder 90%, ice crystal 4.5%, brown iron oxide
1.5%th, bentonite 1%, xanthans 3%；Specifically preparation method is：By alumina powder, ice crystal, brown iron oxide, bentonite and
Xanthans is mixed, and obtains the second compo, then the second compo is added to the water well mixed, is produced.
Described subbing and the thickness of investment precoat are 1.5mm.
Described floating bead is lightweight floating bead, and lightweight floating bead is a kind of fly ash hollow ball that can be bubbled through the water column, in canescence,
Wall is thin hollow, unit weight 418.8kg/m3, about 0.1 millimeter of particle diameter, surface-closed and it is smooth, thermal conductivity is small, refractoriness >=1610 DEG C；
Described modified water glass is commercially available prod, such as the modified water glass of Qingdao Di Ke railway equipments Co., Ltd production
Glass, as bonding agent, can make rising head sand mo(u)ld without drying procedure, have after 15 minutes from hard effect.
Described curing agent is the organic grease hardening agent of commercially available prod, such as Qingdao Dicon A/S, and for example Hubei Jing Zhou
The organic grease hardening agent of Tai Meng productions, the bonding time for shortening modified water glass.
Coating of the present invention obtained through test of many times it is same or like as result, below to produce same under the same terms
The contrast situation of specification fused cast refractories：
Test group and the equal production specification of control group are each 10 pieces of 1400mm × 300mm × 400mm tank blocks, test group and right
According to a group use identical brick body sand mold, casting liquid, incubator and the working condition of same recipe, only difference is that test group
Using rising head sand mold of the present invention, control group uses traditional rising head sand mold, and the brick body situation contrast after cast molding is as follows：
The cost table of comparisons of table 1
| Test group | Control group | |
| Rising head weight | 490kg | 665.7kg |
| Rising head sand mold cost | 310 yuan | 110 yuan |
| Use casting liquid gross weight | 10635kg | 12974kg |
| Use casting liquid totle drilling cost | 53175 | 64870 |
Form 2 is the brick body quality index table of comparisons
| Test group | Control group | |
| Tank block volume-weighted average | 3.88 | 3.74 |
| Rising head volume-weighted average | 2.9 | 3.18 |
| The average zirconium content of empty conveyor zones | 29.1% | 30.8% |
| The average zirconium content in half dense area | 32.5% | 31.5% |
| The average zirconium content in puffs | 32.45% | 31.32% |
| The average zirconium content in dense area | 34.2% | 33.51% |
There is above-mentioned situation to be clear that：Tank block unit weight substantially increases, and reaches or even beyond the pool wall of foreign capitals brand
Brick consistency, the average zirconium content in puffs improves 1.13%, hence it is evident that improve the interior quality of tank block, it is to avoid tank block
Internal defect causes glass metal excessive erosion, the security incident for occurring glass metal leakage, extends the service life of glass furnace；
Ten pieces of bricks increase by 2000 yuan of rising head cost from a cost perspective, but casting liquid gross weight is substantially reduced, than traditional casting mode
Few to use casting liquid 2339kg, 5000 yuan of solution cost per ton saves 2.339 × 5000=11695 of fund members altogether, that is to say, that
10 pieces of tank blocks of production save fund 11695-2000=9695 members, remarkable in economical benefits, for industry development and have
Preferably promote meaning and social value.
Claims (3)
1. a kind of exothermic riser of fused alumina zirconia without shrinkage cavity brick casts the preparation method of sand mo(u)ld, it is characterised in that exothermic riser is cast
Sand mo(u)ld includes rising head sand mold body, and rising head sand mold body is bolted together by polylith sand plate and constituted, the preparation method of every block of sand plate
Comprise the following steps：
A, making sand board mold, sand board mold is the insulation surface layer mold by being stacked from bottom to top（3a）, heating protect
Warm layer mold（3b）With insulation internal layer mold（3c）The hollow structure of the upper opening of composition, is incubated surface layer mold（3a）
Through the first loose-leaf on side（4a）With heat preservation layer mold（3b）It is connected, heat preservation layer mold（3b）Through setting
Put the second loose-leaf in the positive offside of the first loose-leaf（4b）With insulation internal layer mold（3c）It is connected, constitutes end to end convertible
Movable three link configurations；
B, making insulation surface layer dispensing, insulation surface layer dispensing is by percentage by weight meter：Silica sand 50%, floating bead 45%, modification
What waterglass 4%, curing agent 1% was made, wherein silica sand, floating bead, modified water glass and curing agent are stirred into 2.5- in mixer
3.5 minutes, produce；
C, successively will be incubated internal layer mold, heat preservation layer mold from insulation surface layer mold upper oral part open, will make
The insulation surface layer dispensing performed is filled to insulation surface layer mold, compacting；
D, making heat preservation layer dispensing, heat preservation layer dispensing is by percentage by weight meter：Aluminum shot 18%, brown iron oxide
6%th, floating bead 64%, modified water glass 10%, what curing agent 2% was made, wherein by aluminum shot, brown iron oxide, floating bead, modified water glass
Glass and curing agent are stirred 2.5-3.5 minutes in mixer, are produced；
E, by heat preservation layer mold upset be superimposed upon again insulation surface layer mold upper oral part, while will be incubated internal layer mould
The specific upper oral part from heat preservation layer mold is opened, and the heat preservation made layer dispensing is filled to heat preservation layer mould
In specific, compacting；
F, making insulation internal layer dispensing, insulation internal layer dispensing is by percentage by weight meter：Silica sand 50%, floating bead 45%, modification
What waterglass 4%, curing agent 1% was made, wherein silica sand, floating bead, modified water glass and curing agent are stirred into 2.5- in mixer
3.5 minutes, produce；
G, by be incubated internal layer mold upset be superimposed upon insulation surface layer mold upper oral part, by the insulation internal layer dispensing made
In filling to insulation internal layer mold, compacting, form removal produces sand plate after standing 24 hours；
H, the surface for being incubated internal layer in sand plate apply the thick barrier coatings of 3mm, stand more than three days；
I, the sand plate made in step H is bolted together by the structure of rising head, and rising head is produced with conventional binder bonding
Sand mold body.
2. exothermic riser of the fused alumina zirconia according to claim 1 without shrinkage cavity brick casts the preparation method of sand mo(u)ld, its feature exists
In the barrier coating in described step H is to be applied by the subbing for being applied to sand plate insulation internal layer surface with bottom is applied to
Expect the investment precoat composition on surface；
Described subbing includes the component of percentage by weight meter：First compo 50%, water 50%；Wherein, described
One compo includes the component of percentage by weight meter：Graphite powder 93%, ice crystal 4%, bentonite 3%；Specifically preparation method is：
Graphite powder, bentonite are mixed, the first compo is obtained, then the first compo is added to the water it is well mixed,
Produce；
Described investment precoat includes the component of percentage by weight meter：Second compo 66%, water 34%；Wherein, described
Two compoes include the component of percentage by weight meter：Alumina powder 90%, ice crystal 4.5%, brown iron oxide 1.5%, swelling
Soil 1%, xanthans 3%；Specifically preparation method is：Alumina powder, ice crystal, brown iron oxide, bentonite and xanthans are mixed
Together, the second compo is obtained, then the second compo is added to the water well mixed, is produced.
3. exothermic riser of the fused alumina zirconia according to claim 2 without shrinkage cavity brick casts the preparation method of sand mo(u)ld, its feature exists
In described subbing and the thickness of investment precoat are 1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610209237.XA CN105689648B (en) | 2016-04-06 | 2016-04-06 | Exothermic riser casting sand mo(u)ld of the fused alumina zirconia without shrinkage cavity brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610209237.XA CN105689648B (en) | 2016-04-06 | 2016-04-06 | Exothermic riser casting sand mo(u)ld of the fused alumina zirconia without shrinkage cavity brick |
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| CN105689648B true CN105689648B (en) | 2017-10-03 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200939499Y (en) * | 2006-08-07 | 2007-08-29 | 济南圣泉集团股份有限公司 | Novel heating and warming riser sleeve |
| AU2011100793A4 (en) * | 2011-07-01 | 2011-09-22 | Sufa Hengdian Machine Co.,Ltd.CNNC | Blind riser |
| CN203184584U (en) * | 2013-01-17 | 2013-09-11 | 中国科学院金属研究所 | Heat-preservation live riser for large-sized extra-thick plate blank |
| CN203697236U (en) * | 2013-12-06 | 2014-07-09 | 长兴万顺保温材料有限公司 | Insulated feeder |
| CN205519502U (en) * | 2016-04-06 | 2016-08-31 | 郑州远东耐火材料有限公司 | Zirconium corundum does not have exothermic riser casting sand mo(u)ld of shrinkage cavity brick |
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