CN105645980A - Totally-enclosed thermal-insulation riser sand mold for shrinkage-hole-free tank sidewall zirconia-corundum refractory bricks - Google Patents
Totally-enclosed thermal-insulation riser sand mold for shrinkage-hole-free tank sidewall zirconia-corundum refractory bricks Download PDFInfo
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- CN105645980A CN105645980A CN201610209135.8A CN201610209135A CN105645980A CN 105645980 A CN105645980 A CN 105645980A CN 201610209135 A CN201610209135 A CN 201610209135A CN 105645980 A CN105645980 A CN 105645980A
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- sand mold
- reducer
- rising head
- straight length
- head sand
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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
- C04B35/01—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
- C04B35/10—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 aluminium oxide
- C04B35/107—Refractories by fusion casting
- C04B35/109—Refractories by fusion casting containing zirconium oxide or zircon (ZrSiO4)
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00431—Refractory materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention relates to a totally-enclosed thermal-insulation riser sand mold for shrinkage-hole-free tank sidewall zirconia-corundum refractory bricks. The riser sand mold can effectively solve the problem of the non-ideal feeding effect in a casting process of the shrinkage-hole-free tank sidewall zirconia-corundum refractory bricks. According to the technical scheme, the riser sand mold comprises a riser sand mold body; the riser sand mold body is of a hollow structure, is open at the top and bottom, and comprises a middle straight-tube section, an upper reducer section at the upper end of the straight-tube section and a lower reducer section at the lower end of the straight-tube section; a large opening end of the lower reducer section is connected with a lower opening part of the straight-tube section, an upper opening part of the straight-tube section is connected with a large-opening end of the upper reducer section, and a cover plate for sealing is arranged at a small-opening end of the upper reducer section. The totally-enclosed thermal-insulation riser sand mold disclosed by the invention enables a cast zirconia-corundum refractory brick solution to decrease the cooling speed by improving the shape and materials of the riser sand mold, accordingly, the liquid-state time is prolonged; the thermal-insulation effect is better, so that the unit weight of the tank sidewall bricks is obviously increased, the interior quality of the tank sidewall bricks is improved, the production cost is greatly lowered, and the economic benefit is apparent.
Description
Technical field
The present invention relates to Corhart Zac-block rising head sand mold (also known as sand mo(u)ld), particularly a kind of for without shrinkage cavity pool wall fused cast refractories Totally enclosed heat-preserving rising head and preparation method thereof.
Background technology
Zirconia-corundum refractory brick develops time decades in China, its casting sand mold raw material is all with silica sand for main material, add waterglass or resin is the production that bonding agent carries out sand mold sand mo(u)ld, the resistance to elevated temperatures of silica sand and thermal resistance effect are more suitable for fused cast refractories sand mo(u)ld and make, add its aboundresources, the advantage that cost is low, remains the preferred material of fused cast refractories sand mo(u)ld so far.
The service life of float glass furnace is average at about 8 years at present, the average life of horse shoe flame domestic glass kiln was at about 5 years, the tank block of glass furnace is the key position in glass furnace service life, from industry development angle, current glass furnace there is higher requirement service life. External float glass furnace has reached 12 years service life, and horse shoe flame domestic glass kiln can reach 8 years service life, and under contrast, we have a certain distance. Observe and find that the tank block internal structure of domestic multiple fused cast refractories manufacturers has individual common trait: the blank brick of tank block forward solves plane together with rising head, find that 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 the service life of fused cast refractories. Data shows: fused cast refractories produce casting after, high-temp liquid is in sand mo(u)ld, and indissoluble material zirconium composition is displaced outwardly rapid crystallization, and meltable material inwardly moves, due to zirconium composition proportion between fused cast refractories silicon/aluminum/zirconium maximum, under action of gravity, zirconium composition moves down simultaneously. Here it is the segregation phenomena of fused cast refractories. Owing to pool wall turns rising head partial volume more than brick body volume, rising head and brick body coupling part are thermal center points, and liquation setting rate is very fast, is the formation of the rising head inner melt access denial to brick body feeding after solidification. This is tank block crystalline phase macrosegregation the biggest factor. As it is shown in figure 1, tank block shows four regions together with the planing surface of rising head: half dense area B of the empty conveyor zones A on rising head top, rising head and brick body junction, the puffs C in brick body centre position, brick body bottommost dense area D.Half dense area of rising head and brick body connecting portion is formed and is because that pyrosol setting rate is too fast causes herein, and after solidification, the solution in rising head cannot be unimpeded to the passage of brick body feeding herein. puffs in the middle of brick body are fused cast refractories interior quality defects, in glass furnace uses, after vitreous humour corrodes the puffs in the middle of brick body, will the position, puffs of accelerated erosion tank block, when the middle part of certain block tank block is loosened serious, setting causes vitreous humour excessive erosion, there is the security incident of vitreous humour leakage, in order to make glass furnace increase the service life, avoid the security incident because tank block internal defect effectively causes, the internal defect defect of tank block is anxious to be waited to improve, the solution of tank block internal defect problem is to fused cast refractories manufacturer, the development of glass production producer there is decisive meaning.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the purpose of the present invention is just to provide a kind of for without shrinkage cavity pool wall fused cast refractories Totally enclosed heat-preserving rising head sand mold, can effectively solve the problem undesirable without feeding effect in shrinkage cavity pool wall fused cast refractories casting cycle.
The technical scheme that this invention address that is, a kind of for without shrinkage cavity pool wall fused cast refractories Totally enclosed heat-preserving rising head sand mold, including rising head sand mold body, described rising head sand mold body is the hollow structure of the upper and lower opening being made up of middle straight length, the upper reducer of straight length upper end and the lower reducer of straight length lower end, the lower big opening end of reducer is connected with the infraoral of straight length, the upper oral part of straight length is connected with the big opening end of upper reducer, and the osculum end of upper reducer is provided with the cover plate for sealing.
The preparation method of a kind of Totally enclosed heat-preserving rising head sand mold, comprises the following steps:
A, make rising head sand mold body molding dispensing A, molding dispensing A is by weight percent meter: lightweight floating bead 50%, refractory fiber cotton 20%, modified water glass 15%, silica sand 15% are made, wherein lightweight floating bead, silica sand, refractory fiber cotton are stirred 2.5-3.5 minute in blender, it is subsequently adding modified water glass, after being stirred for 2.5-3.5 minute, to obtain final product.
In B, the mould that molding dispensing A filling is extremely matched with rising head sand mold shape, after standing 24 hours after compression, namely form removal obtains rising head sand mold body, the structure of described rising head sand mold body is the hollow structure of the upper and lower opening being made up of middle straight length, the upper reducer of straight length upper end and the lower reducer of straight length lower end, the lower big opening end of reducer is connected with the infraoral of straight length, and the upper oral part of straight length is connected with the big opening end of upper reducer.
C, making the molding dispensing B of cover plate, molding dispensing B is by weight percent meter: floating bead 95% and what modified water glass 5% was made, wherein, by floating bead and modified water glass mix homogeneously and get final product;
D, molding dispensing B is filled to in the mould of cover plate mating shapes, stand form removal after 24 hours after compression and namely obtain cover plate, cover plate is the cuboid that can be completely covered by the upper oral part of straight length.
During use, being assembled on brick body sand mold by rising head sand mold body, the lower reducer infraoral of rising head sand mold body is just right with the upper oral part of brick body sand mold, and fused cast refractories casting liquid enters from the upper oral part of the upper reducer of rising head sand mold body, after casting program completes, cover plate is covered the upper oral part of upper reducer.
Totally enclosed heat-preserving rising head sand mould structure novelty uniqueness advantages of simple of the present invention, by the improvement to rising head sand mold shape and material, so as to the fused cast refractories solution after casting slows down radiating rate, it is ensured that liquid time lengthening; So as to better heat preservation, pyrosol radiating rate is slower, allows pyrosol have time enough that brick body is carried out feeding, so that tank block unit weight substantially increases, improve the interior quality of tank block, and greatly reduce production cost, remarkable in economical benefits.
Accompanying drawing explanation
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 that tank block shows 4 regions together with the section of rising head.
Fig. 2 is the front view of the present invention.
Fig. 3 is the top view (not installing cover plate) of the present invention.
Fig. 4 is the sectional view that the present invention uses state.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
As in Figure 2-4, the present invention includes rising head sand mold body 1, described rising head sand mold body is the hollow structure of the upper and lower opening being made up of middle straight length 1a, the upper reducer 1b of straight length 1a upper end and the lower reducer 1c of straight length 1a lower end, the big opening end of lower reducer 1c is connected with the infraoral of straight length 1a, the upper oral part of straight length 1a is connected with the big opening end of upper reducer 1b, and the osculum end of upper reducer 1b is provided with the cover plate 2 for sealing;
For ensureing result of use, described straight length 1a is circular or square, when straight length is circular, upper reducer 1b and lower reducer 1c is reducing pipe, the diameter 300mm less of the diameter of straight length 1a intracavity section of upper reducer osculum end, when straight length is square, upper reducer 1b and lower reducer 1c is reducing square tube, the little 300mm of the length of side of the side ratio straight length intracavity section of upper reducer 1b osculum end 11b;
Described rising head sand mold body 1 is arranged on brick body sand mold 3, brick body sand mold 3 is the hollow structure of upper opening, its inner chamber constitutes the molding space of fused cast refractories, and the inner chamber of rising head sand mold body 1 constitutes the feeding space of fused cast refractories, and the infraoral of lower reducer 1c is just right with the upper oral part of brick body sand mold 3.
The preparation method of a kind of Totally enclosed heat-preserving rising head sand mold, comprises the following steps:
A, make rising head sand mold body molding dispensing A, molding dispensing A is by weight percent meter: lightweight floating bead 50%, refractory fiber cotton 20%, modified water glass 15%, silica sand 15% are made, wherein lightweight floating bead, silica sand, refractory fiber cotton are stirred 3 minutes in blender, it is subsequently adding modified water glass, after being stirred for 3 minutes, to obtain final product.
In B, the mould that molding dispensing A filling is extremely matched with rising head sand mold shape, after standing 24 hours after compression, namely form removal obtains rising head sand mold body, the structure of described rising head sand mold body is the hollow structure of the upper and lower opening being made up of middle straight length 1a, the upper reducer 1b of straight length 1a upper end and the lower reducer 1c of straight length lower end, the big opening end of lower reducer 1c is connected with the infraoral of straight length 1a, and the upper oral part of straight length 1a is connected with the big opening end of upper reducer 1b.
C, making the molding dispensing B of cover plate, molding dispensing B is by weight percent meter: floating bead 95% and what modified water glass 5% was made, wherein, by floating bead and modified water glass mix homogeneously and get final product;
D, molding dispensing B is filled to in the mould of cover plate mating shapes, stand form removal after 24 hours after compression and namely obtain cover plate, cover plate is the cuboid that can be completely covered by the upper oral part of straight length 1a.
During use, rising head sand mold body is assembled on brick body sand mold 3, the lower reducer 1c infraoral of rising head sand mold body is just right with the upper oral part of brick body sand mold 3, the upper oral part of the fused cast refractories casting liquid upper reducer 1b from rising head sand mold body enters, after casting program completes, cover plate is covered the upper oral part of upper reducer.
Described lightweight floating bead is commercially available prod, and lightweight floating bead is a kind of fly ash hollow ball that can bubble through the water column, in canescence, the thin hollow of wall, unit weight 418.8kg/m3, particle diameter about 0.1 millimeter, surface-closed and smooth, thermal conductivity is little, refractoriness >=1610 DEG C;
Described modified water glass is commercially available prod, as Qingdao Di Ke railway equipment company limited produce modified water glass, as bonding agent, it is possible to make rising head sand mo(u)ld without drying procedure, from hard effect after having 15 minutes.
Coating of the present invention through test of many times all obtain same or like like result, be below under the same terms produce same specification fused cast refractories contrast situation:
Test group and the equal production specification of matched group are each 10 pieces of 1400mm �� 300mm �� 400mm tank block, brick body sand mold, the casting liquid of same recipe, couveuse and the working condition that test group is identical with matched group employing, only difference is that test group adopts rising head sand mold of the present invention, what matched group was coated with is adopt traditional rising head sand mold, and the brick body situation contrast after cast molding is as follows:
Table 1 cost synopsis
| Test group | Matched group | |
| Rising head weight | 490kg | 665.7kg |
| Rising head sand mold cost | 290 yuan | 110 yuan |
| Use casting liquid gross weight | 11330kg | 12957kg |
| Use casting liquid totle drilling cost | 56650 | 64785 |
Form 2 is brick body quality index synopsis
| Test group | Matched group | |
| Tank block unit weight | 3.83 | 3.75 |
| Rising head unit weight | 3.0 | 3.17 |
| Cavity conveyor zones average zirconium content | 30.88% | 30.8% |
| Half dense area average zirconium content | 32.51% | 31.98% |
| Puffs average zirconium content | 32.4% | 31.37% |
| Dense area average zirconium content | 33.8% | 33.55% |
There is above-mentioned situation it is clear that tank block unit weight substantially increases, reach the tank block consistency even beyond foreign capitals brand, puffs average zirconium content improves 1.04%, significantly improve the interior quality of tank block, avoid tank block internal defect and cause vitreous humour excessive erosion, there is the security incident of vitreous humour leakage, extend the service life of glass furnace; Ten pieces of bricks increase the rising head cost of 1800 yuan from a cost perspective, but casting liquid gross weight is substantially reduced, ratio tradition casting mode few casting liquid 1627kg, solution cost per ton 5000 yuan, amount to saving fund 1.627 �� 5000=8135 unit, that is producing 10 pieces of tank blocks and save fund 8135-1800=6335 unit, remarkable in economical benefits, for industry development and have and better promote meaning and social value.
Claims (4)
1. one kind is used for without shrinkage cavity pool wall fused cast refractories Totally enclosed heat-preserving rising head sand mold, including rising head sand mold body (1), it is characterized in that, described rising head sand mold body is by middle straight length (1a), the hollow structure of the upper and lower opening that the upper reducer (1b) of straight length (1a) upper end and the lower reducer (1c) of straight length (1a) lower end are constituted, the big opening end of lower reducer (1c) is connected with the infraoral of straight length (1a), the upper oral part of straight length (1a) is connected with the big opening end of upper reducer (1b), the osculum end of upper reducer (1b) is provided with the cover plate (2) for sealing.
2. according to claim 1 for without shrinkage cavity pool wall fused cast refractories Totally enclosed heat-preserving rising head sand mold, it is characterized in that, described straight length (1a) is for circular or square, when straight length is circular, upper reducer (1b) and lower reducer (1c) are reducing pipe, the diameter 300mm less of the diameter of straight length (1a) intracavity section of upper reducer osculum end, when straight length is square, upper reducer (1b) and lower reducer (1c) are reducing square tube, the little 300mm of the length of side of the side ratio straight length intracavity section of upper reducer (1b) osculum end (11b).
3. according to claim 1 for without shrinkage cavity pool wall fused cast refractories Totally enclosed heat-preserving rising head sand mold, it is characterized in that, described rising head sand mold body (1) is arranged on brick body sand mold (3), the hollow structure that brick body sand mold (3) is upper opening, its inner chamber constitutes the molding space of fused cast refractories, the inner chamber of rising head sand mold body (1) constitutes the feeding space of fused cast refractories, and the infraoral of lower reducer (1c) is just right with the upper oral part of brick body sand mold (3).
4. the preparation method of the Totally enclosed heat-preserving rising head sand mold described in a claim 1, it is characterised in that comprise the following steps:
A, make rising head sand mold body molding dispensing A, molding dispensing A is by weight percent meter: lightweight floating bead 48-52%, refractory fiber cotton 19-21%, modified water glass 14-16%, silica sand 14-16% make, wherein lightweight floating bead, silica sand, refractory fiber cotton are stirred 2.5-3.5 minute in blender, it is subsequently adding modified water glass, after being stirred for 2.5-3.5 minute, to obtain final product;
In B, the mould that molding dispensing A filling is extremely matched with rising head sand mold shape, after standing 24 hours after compression, namely form removal obtains rising head sand mold body, the structure of described rising head sand mold body is the hollow structure of the upper and lower opening being made up of middle straight length (1a), the upper reducer (1b) of straight length (1a) upper end and the lower reducer (1c) of straight length (1a) lower end, the big opening end of lower reducer (1c) is connected with the infraoral of straight length (1a), and the upper oral part of straight length (1a) is connected with the big opening end of upper reducer (1b);
C, making the molding dispensing B of cover plate, molding dispensing B is by weight percent meter: floating bead 94-96% and what modified water glass 4-6% made, wherein, by floating bead and modified water glass mix homogeneously and get final product;
D, molding dispensing B is filled to in the mould of cover plate mating shapes, stand form removal after 24 hours after compression and namely obtain cover plate, cover plate is the cuboid that can be completely covered by the upper oral part of straight length (1a);
During use, rising head sand mold body is assembled on brick body sand mold (3), lower reducer (1c) infraoral of rising head sand mold body is just right with the upper oral part of brick body sand mold (3), the upper oral part of the fused cast refractories casting liquid upper reducer (1b) from rising head sand mold body enters, after casting program completes, cover plate is covered the upper oral part of upper reducer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610209135.8A CN105645980A (en) | 2016-04-06 | 2016-04-06 | Totally-enclosed thermal-insulation riser sand mold for shrinkage-hole-free tank sidewall zirconia-corundum refractory bricks |
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| CN201610209135.8A CN105645980A (en) | 2016-04-06 | 2016-04-06 | Totally-enclosed thermal-insulation riser sand mold for shrinkage-hole-free tank sidewall zirconia-corundum refractory bricks |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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2016
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Application publication date: 20160608 |