CN103224800B - Coke oven door integral pouring process - Google Patents
Coke oven door integral pouring process Download PDFInfo
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- CN103224800B CN103224800B CN201310143878.6A CN201310143878A CN103224800B CN 103224800 B CN103224800 B CN 103224800B CN 201310143878 A CN201310143878 A CN 201310143878A CN 103224800 B CN103224800 B CN 103224800B
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Abstract
The invention relates to a coke oven door integral pouring process. The process comprises the following steps: preparing pouring materials and mixing materials, horizontally placing a fire door housing, paving two layers of nanometer micropore thermal insulation boards at the bottom, welding an anchoring member and a stainless steel net, placing a die on a fire door housing; pouring the mixed pouring materials into the die; vibrating the pouring materials for eliminating bubbles, flattening the surface and maintaining in the die for 10-12 hours, and placing in the 260-300 DEG C. kiln and baking for 48 hours; cooling, demoulding and coating a slag sticking preventing paint; maintaining at normal temperature for 5-8 days. The coke oven door poured by the integral process can be used on the coke oven for more than half a year without crack or shedding phenomenon, and the surface does not coked, thereby reducing the heat radiation loss of the fire door.
Description
Technical field
The present invention relates to a kind of one-piece casting technique of coke oven door, belong to metallurgical coking field of mechanical technique.
Background technology
Coke oven is the basal heat construction equipment of coking industry, and door lining is in the coking chamber of coke oven, between the metal body of fire door and red Jiao, plays heat-blocking action, to stop scattering and disappearing of heat in coking chamber, fire door is played to provide protection.
CN200720066233.7 discloses a kind of coke oven door structure, comprise firedoor frame shell, also comprise the large-scale refractory precast block of polylith that is arranged on firedoor frame shell inner side, every large-scale refractory precast block is arranged on firedoor frame shell inner side by least two bolts, the cross-sectional structure of large size refractory brick is the trapezoidal of outer narrow inner width at its installation side, after making to install, between refractory brick, firedoor frame shell and carbonizing chamber furnace wall, form two leg-of-mutton spaces, left and right, form raw gas exhaust channel.Coke oven door structure of the present invention does not need brick groove and insulation brick inner liner portion, and liner tile is made the prefabricated section of definite shape, is fixed by bolts on fire door, whole fire door not only quality is light, high temperature resistant and anti-thermal shock, life-span are long, and simple in structure, easy to assembly.The door lining that now coke oven uses is all the technique of laying bricks, and the engineering time is long, and fire door brickwork joint is on the high side, and fire door is easily from brickwork joint damage, seriously easy to clean not of coking.Life-span is on the low side, and maintenance capacity is large.CN200410023877.9 provides a kind of pouring technology to make furnace door brick, and step is: (1) batching: mullite particle diameter be less than 5mm 30%, mullite particle diameter is less than 21% of 0.088mm; Trichroite particle diameter is less than 35% of 5mm; Calcining Al
2o
3micro mist 3%; Silicon powder 4%; Alundum cement 7%; Additional tripoly phosphate sodium STPP 0.3%; (2) add water to stir after 5 minutes after weighing and pour model internal vibration 2-3 minute into, make mould material closely knit; (3) natural curing after 12 hours in model, form removal maintenance 3 days again, dry 7 days, 1300 DEG C of firing temperatures, burnt 3 hours, make finished product.The furnace door brick that this method is made can improve the stopping property of coke oven door, prevents that flue gas from scattering, and improves coke quality simultaneously, has also extended fire door work-ing life.The furnace door brick of this technique manufacture belongs to a kind of large scale prefabricated brick, when application, according to fire door size, some bricks is formed to a fire door, steel construction and refractory mortar bundle knot for intermediate demand.Although this method has reduced quantity and the settling time of brick, but large scale prefabricated brick easily damages in transport, installation process, and one of them damage will be changed, two bricks adjacent in Renewal process also can must be changed because of loosening, every brick, all in hundreds of kilogram left and right, is changed very inconvenient.
CN97237533.3 utility model discloses a kind of Integral cast type thermal-insulating door for coke furnace, its structure is: be made up of door body, reinforced concrete foundation, high temperature resistant silicic acid aluminium sheet, convex steel plate, brick groove and insulating brick layer, it is characterized in that: described door body, reinforced concrete foundation, high temperature resistant silicic acid aluminium sheet, convex steel plate, brick groove and insulating brick layer pour into entirety.This new furnace door has good heat-insulation effect, and fire door surface heat radiating loss is few, and heat utilization efficiency is high, low cost of manufacture, the advantages such as long service life.But this fire door is built more complicated, and expense is higher.
Summary of the invention
For the deficiencies in the prior art, in order to improve door lining heat-proof quality, extend the fire door life-span, to shorten and build by laying bricks or stones the time, the invention provides a kind of one-piece casting technique of coke oven door, for making door lining, can be used for 4.3 meters of above coke ovens.
Term explanation:
Coke oven door, belongs to a kind of appurtenances of coke oven plant, mainly comprises fire door doorframe, oven door body, mounting block.
A kind of coke oven door one-piece casting technique, comprises that step is as follows:
(1) mould material batching:
The andaluzite 0-5wt% of aluminum oxide powder 4-7wt%, the particle diameter≤0.045mm of silicon powder 5-8wt%, the particle diameter <0.5 μ m of M60 mullite 15-20wt%, the particle diameter 3.1-8mmM60 mullite 30-40wt% of M60 mullite 30-40wt%, the particle diameter 1-3mm of particle diameter≤0.088mm, high-alumina cement 0-5wt%, the particle diameter <0.5 μ m of steel fiber 1-3wt%, particle diameter≤0.088mm, above each component sum is 100%.
In the total amount of above-mentioned solid material, separately add tripoly phosphate sodium STPP 0.1-0.25wt%, water 6-9wt%.
Mould material batch mixing: the limit of preparing burden above adds waterside stirs, and is mixed evenly; Storage temperature 15-30 DEG C.
(2) by outer coke oven door doorframe facade horizontal down, the side weld anchor firmware of fire door doorframe inner bottom surface and surrounding; And lay heat preserving and insulating material at fire door doorframe inner bottom part, by placed on it fire door mould, the mould material being stirred is poured in fire door mould into uniform distribution when mould material enters mould;
(3) mould material of vibrating makes air scavenge, mould material closely knit, vibrating time 4～8 minutes;
(4) mould material maintenance 10～12h in mould, puts into 260～300 DEG C of kilns and toasts 48 hours; The cooling rear demoulding;
(5) natural curing 5～8 days.
Preferred according to the present invention, above-mentioned steps (4) or step (5) afterwards, are coated with the anti-slag coating of being stained with of one deck on the oven door body surface pouring into.This coating is used for preventing fire door surface coking.
Preferred according to the present invention, above-mentioned steps also comprises in (2), lays after heat preserving and insulating material at fire door doorframe inner bottom part, and stainless steel guard is welded on fire door doorframe side; Play the effect that strengthens rib.Described stainless (steel) wire is convex or circular arc upward.
Preferred according to the present invention, in above-mentioned steps (1), by the batching mix and blend 1-2min outside dewatering, after mixing, to divide and add water for 3-4 time, limit adds waterside and stirs.The mould material of mixing and stirring in stirrer must go out continuously, must not be deposited in stirrer, and once unspent mould material also must not be returned to stirrer and carries out secondary stirring.
Preferred according to the present invention, above-mentioned steps (1) mould material batch mixing process should be carried out under 15-30 DEG C of envrionment temperature.
Preferred according to the present invention, above-mentioned steps (1) mould material batching is as follows:
The andaluzite 1-5wt% of aluminum oxide powder 4-7wt%, the particle diameter≤0.045mm of silicon powder 5-8wt%, the particle diameter <0.5 μ m of M60 mullite 15-20wt%, the particle diameter 3.1-8mmM60 mullite 30-35wt% of M60 mullite 30-40wt%, the particle diameter 1-3mm of particle diameter≤0.088mm, high-alumina cement 1-4wt%, the particle diameter <0.5 μ m of steel fiber 1-3wt%, particle diameter≤0.088mm, above each component sum is 100%.In the total amount of above-mentioned solid material, separately add tripoly phosphate sodium STPP 0.1-0.25wt%, water 6-9wt%.
According to the present invention, further preferred, above-mentioned steps (1) mould material batching is as follows:
Andaluzite 3～4wt% of silicon powder 3～6wt% of M60 mullite 30wt%, the steel fiber 3wt% of M60 mullite 15wt%, the particle diameter 3.1-8mm of M60 mullite 35～40wt%, the particle diameter 1-3mm of particle diameter≤0.088mm, the high-alumina cement 3～4wt% of particle diameter≤0.088, particle diameter <0.5 μ m, aluminum oxide powder 3～4wt%, the particle diameter≤0.045mm of particle diameter <0.5 μ m; Each component sum is 100%.In the total amount of above-mentioned solid material, separately add tripoly phosphate sodium STPP 0.20wt%, water 7～8.5wt%.
High-alumina cement is the cement of the composition taking calcium aluminate as essential mineral, also claims luminite cement.Market various models on sale all can.
Preferred according to the present invention, it is nano level silicic acid titanium (Ti that the described heat preserving and insulating material of above-mentioned steps (2) is selected the main component that 800 DEG C of thermal conductivitys are 0.03～0.034W/Mk
2si
2o
5) high-temp solid thermal insulation material.
The present invention is brand Unithermal nanometer micropore thermal baffle (helping hot plate) series product particularly preferably, and 800 DEG C of thermal conductivitys are 0.034, and it is on sale that heat resisting material company limited is helped in Shanghai.Product information is as follows:
Preferred according to the present invention, be coated with the anti-slag coating of being stained with on the oven door body surface pouring into, be stained with slag coating for HWFJ-3G hot metal ladle coating against binding slags is anti-, main component is magnesite, quartz, clay, chromic oxide differential and phosphoric acid salt, and Xingtai Sheng Chang Refractory Co., ltd is on sale.
According to the present invention, mould material requires construction temperature at normal temperature, but winter construction environment temperature mostly below 10 DEG C, in order to ensure mould material construction quality, mould material must be left in indoorly, take Insulation, with getting with use.
When mould material enters mould, uniform distribution is very important, must not topple over continuously mould material a position, and the material grain etc. that is scattered in casting surface in the time entering mould should be cleaned out immediately, ensures mould material any surface finish.
While vibrating mould material, vibrating head should slowly drag, and allows gas as often as possible get rid of, and arrives the construction vibrating time of setting.When cast, prevent swollen mould, spillage.
When the demoulding, should ensure to pour into a mould fire door body surface and corner angle do not damage.Generally should be by the reverse dismounting of formwork erection order.Must not firmly beat template and mould material, with antisitic defect mould material.
Process using one-piece casting of the present invention, once shaped, has ensured the globality of fire door, when use procedure need to be repaired afterwards, only needs to adopt identical mould material sectional repair.
Adopt the mould material smooth and bright surface of construction technology of the present invention, void content is low, degree of compactness is high, casting quality is very good, up-to-standard rate reaches more than 95%, has good heat retaining property and slag adhesion, has reduced the calorific loss of fire door, there is good sealing property, extended the life-span of fire door.
One-piece casting fire door of the present invention can use on 4-5 rice coke oven, on average use the phenomenons such as more than 6 months flawless, nothing come off, the not obvious easy to clean of fire door surface coking, lay bricks compared with fire door with former tradition, fire door temperature has reduced by 20 DEG C of left and right, has reduced the engineering time, because material heat-proof quality is good, can ensure fire door coke quality, also reduce heat lost by radiation.Taking 42 hole coke ovens as example, annual saving energy 7.4 ten thousand m
3coke-oven gas, is created approximately 5.2 ten thousand yuan of/coke oven/years of energy-conservation value by reducing heat lost by radiation.
Brief description of the drawings
Fig. 1 is one-piece casting fire door side schematic view of the present invention; Fig. 2 is one-piece casting fire door front schematic view.Wherein, 1, firedoor frame, 2, the insulation heat-insulating shield laid of fire door bottom, 3, anchoring piece, 4, stainless (steel) wire, 5, the oven door body that forms of cast, 6, fire door surface anti-coking coating.
Embodiment
Be that the present invention is described further below in conjunction with embodiment, but the present invention is not limited thereto.
Embodiment Raw is commercial product.The gloomy ceramic company limited in M60 mullite (product series of various particle diameters) Lu Hong Wal, Zibo is on sale.Steel fiber adopts the makers' steel wire steel fiber of the gloomy steel fiber of Hebei space product.High-alumina cement (CA50), metal and stone Nai Cai company limited of andaluzite Zhengzhou City are on sale.Prevent that being stained with slag coating is HWFJ-3G hot metal ladle coating against binding slags, Xingtai Sheng Chang Refractory Co., ltd is on sale.
Embodiment 1: coke oven door one-piece casting technique, step is as follows:
(1) mould material batching:
The andaluzite 5wt% of the silicon powder 5wt% of M60 mullite 35wt%, the steel fiber 1wt% of M60 mullite 15wt%, the particle diameter 3.1-8mm of M60 mullite 30wt%, the particle diameter 1-3mm of particle diameter≤0.088mm, the high-alumina cement 2wt% of particle diameter≤0.088, particle diameter <0.5 μ m, aluminum oxide powder 7wt%, the particle diameter≤0.045mm of particle diameter <0.5 μ m;
In the total amount of above-mentioned solid material, separately add tripoly phosphate sodium STPP 0.15wt%, water 6wt%.
Mould material batch mixing: other raw materials outside dewatering in preparing burden are above poured in stirrer and stirred 2min by proportioning, divide and add water for 3 times after mixing, limit adds waterside and is stirred to evenly; Batch mixing and storage temperature are 15-30 DEG C.
(2) firedoor frame horizontal, inner cleaning is clean, fire door bottom and surrounding weldering anchoring piece, and two-layer at bottom paving nanometer micropore thermal baffle, thermal baffle main component is nano level silicic acid titanium Ti
2si
2o
5powder, model UniBoard1000(helps in Shanghai heat resisting material company limited), 800 DEG C of thermal conductivity 0.032W/Mk.Soldering stainless steel net; Mould is placed on it, the mould material being stirred is poured in fire door mould into uniform distribution when mould material enters mould;
(3) vibrating head slowly vibrates eliminating bubble, and the mould material of vibrating makes mould material closely knit, vibrating time 4～8 minutes; Prevent swollen mould, spillage;
(4) mould material maintenance 12h in mould, puts into 260～300 DEG C of kilns and toasts 48 hours; The cooling rear demoulding; The oven door body surface forming in cast is coated with the anti-slag coating (HWFJ-3G hot metal ladle coating against binding slags, Xingtai Sheng Chang Refractory Co., ltd) of being stained with of one deck.
(5) natural curing 6 days.Obtain the coke oven door of one-piece casting.
Embodiment 2: as described in Example 1, difference is that mould material batching is as follows:
M60 mullite (≤0.088mm): 35wt%, M60 mullite (1-3mm): 15wt%, M60 mullite (3.1-8mm): 30wt%, steel fiber 3wt%, high-alumina cement (≤0.088mm): 3wt%, silicon powder (<0.5 μ m): 6wt%, aluminum oxide powder is (<5 μ m): 4wt%, particle diameter≤0.045mm andaluzite 4wt%; In the total amount of above-mentioned solid material, separately add tripoly phosphate sodium STPP 0.2wt%, water 7wt%.
Embodiment 3: as described in Example 1, difference is that mould material batching is as follows:
M60 mullite (≤0.088mm): 40wt%, M60 mullite (1-3mm): 15wt%, M60 mullite (3.1-8mm): 30wt%, steel fiber 3wt%, high-alumina cement (≤0.088mm): 4wt%, silicon powder (<0.5 μ m): 3wt%, aluminum oxide powder is (<5 μ m): 3wt%, granularity≤0.045mm andaluzite: 2wt%; In the total amount of above-mentioned solid material, separately add tripoly phosphate sodium STPP 0.2wt%, water 8.5wt%.
Embodiment 4: as described in Example 1, difference is that mould material batching is as follows:
M60 mullite≤0.088mm:35wt%, M60 mullite 1-3mm:14wt%, M60 mullite 3.1-8mm:40wt%, steel fiber 2wt%, high-alumina cement≤0.088mm:2wt%, aluminum oxide powder <5 μ m:4wt%, granularity≤0.045mm andaluzite: 3wt%; In the total amount of above-mentioned solid material, separately add tripoly phosphate sodium STPP 0.2wt%, water 9wt%.
Adopt the method one-piece casting fire door of embodiment 1-4, making a fire door using on 4.3 meters of coke ovens approximately needs the mould material of 1.7 tons.The fire door of this embodiment 1-4 is used on 4.3 meters of coke ovens, observe one-piece casting fire door surface crack time of occurrence in process, experimental result sees the following form:
Claims (1)
1. a coke oven door one-piece casting technique, comprises that step is as follows:
(1) mould material batching:
The andaluzite 0-5 wt % of aluminum oxide powder 4-7 wt %, the particle diameter≤0.045mm of silicon powder 5-8 wt %, the particle diameter <0.5 μ m of M60 mullite 15-20 wt %, the particle diameter 3.1-8mmM60 mullite 30-40 wt % of M60 mullite 30-40 wt %, the particle diameter 1-3mm of particle diameter≤0.088mm, high-alumina cement 0-5 wt %, the particle diameter <0.5 μ m of steel fiber 1-3 wt %, particle diameter≤0.088mm, above each component sum is 100%; In the total amount of above-mentioned solid material, separately add tripoly phosphate sodium STPP 0.1-0.25 wt %, water 6-9wt%;
Mould material batch mixing: the limit of preparing burden above adds waterside stirs, and is mixed evenly; Storage temperature 15-30 DEG C;
(2) by outer coke oven door doorframe facade horizontal down, the side weld anchor firmware of fire door doorframe inner bottom surface and surrounding; And lay heat preserving and insulating material at fire door doorframe inner bottom part, by placed on it fire door mould, the mould material being stirred is poured in fire door mould into uniform distribution when mould material enters mould;
It is the high-temp solid thermal insulation material of nano level silicic acid titanium that described heat preserving and insulating material is selected the main component that 800 DEG C of thermal conductivitys are 0.03 ~ 0.034 W/Mk;
(3) mould material of vibrating makes air scavenge, mould material closely knit, vibrating time 4 ~ 8 minutes;
(4) mould material maintenance 10 ~ 12 h in mould, put into 260 ~ 300 DEG C of kilns and toast 48 hours; The cooling rear demoulding; After the demoulding, be coated with the anti-slag coating of being stained with of one deck on the oven door body surface pouring into;
(5) natural curing 5 ~ 8 days.
2
.coke oven door one-piece casting technique as claimed in claim 1, is characterized in that in step (2), being also included in fire door doorframe inner bottom part lays after heat preserving and insulating material, and stainless steel guard is welded on fire door doorframe side, makes to strengthen rib.
3
.coke oven door one-piece casting technique as claimed in claim 1, is characterized in that in step (1) the batching mix and blend 1-2 min outside dewatering, and after mixing, point adds water for 3-4 time, and limit adds waterside stirring.
4
.coke oven door one-piece casting technique as claimed in claim 1, is characterized in that the anti-slag coating of being stained with described in step (4), is stained with slag coating for HWFJ-3G hot metal ladle coating against binding slags is anti-.
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| CN201310143878.6A CN103224800B (en) | 2013-04-23 | 2013-04-23 | Coke oven door integral pouring process |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103979983B (en) * | 2014-05-14 | 2016-01-20 | 莱芜钢铁集团有限公司 | Supporting brackets of sintering machine repair material and preparation method thereof |
| CN111536800A (en) * | 2020-05-14 | 2020-08-14 | 湖州长宜建设有限公司 | Pouring construction method |
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