CN1318346C - Refractory dry powder seal material for coke furnace - Google Patents
Refractory dry powder seal material for coke furnace Download PDFInfo
- Publication number
- CN1318346C CN1318346C CNB2004100176838A CN200410017683A CN1318346C CN 1318346 C CN1318346 C CN 1318346C CN B2004100176838 A CNB2004100176838 A CN B2004100176838A CN 200410017683 A CN200410017683 A CN 200410017683A CN 1318346 C CN1318346 C CN 1318346C
- Authority
- CN
- China
- Prior art keywords
- dry powder
- sealing material
- coke oven
- refractory
- silica
- 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.)
- Expired - Lifetime
Links
- 239000000843 powder Substances 0.000 title claims abstract description 41
- 239000000571 coke Substances 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 title description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 31
- 239000011449 brick Substances 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 11
- 239000010433 feldspar Substances 0.000 claims abstract description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004615 ingredient Substances 0.000 claims abstract description 6
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 14
- 230000009970 fire resistant effect Effects 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000003566 sealing material Substances 0.000 abstract description 21
- 238000010276 construction Methods 0.000 abstract description 7
- 239000007789 gas Substances 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 239000011819 refractory material Substances 0.000 abstract description 2
- 239000002912 waste gas Substances 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000004939 coking Methods 0.000 description 9
- 239000002994 raw material Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 230000008439 repair process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- -1 chamotte Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
- 229910021489 α-quartz Inorganic materials 0.000 description 1
- 229910021491 α-tridymite Inorganic materials 0.000 description 1
Abstract
The present invention relates to ingredients of a refractory material, particularly to ingredients of a refractory dry powder sealing material used for patching coke ovens. The refractory dry powder sealing material is composed of 51 to 89 wt% of celite, 5 to 25 wt% of silica brick powder, 5 to 20 wt% of feldspar and 1 to 5 wt% of micro silicon powder with the particle size of smaller than 0.074mm. The refractory dry powder sealing material of the present invention is not only used for repairing small cracks and brick joints of the oven wall of the coke ovens in order to lengthen the service life of the coke ovens, but also can be used for detecting the tightness of oven bodies in order to prevent coke oven gas, waste gas, pollutant, etc. from being leaked. The refractory dry powder sealing material is favorable to environment protection, has simple operation during the construction, and needs simple equipment.
Description
(1) technical field
The present invention relates to the component of refractory materials, relate in particular to a kind of coke oven that can be used for and repair the component of expecting with fire-resistant dry powder sealing.
(2) background technology
Coke oven is the main equipment of coking, and its effect is coking coal to be carried out destructive distillation obtain coke and other pairs product in coking chamber.Coke oven is operated the effects such as thermal stress, mechanical stress and chemical erosion that cause continuously owing to coalingging, pluck door, coke pushing etc. after operation, each position of body of heater is damaged gradually.General coke oven is after using 10 years, and crystal transition in use takes place the residual quartz in its furnace wall material silica brick, causes the furnace wall volume change, the furnace wall swelling cracking, peels off, and is in the majority with crackle especially, makes each position blowby aggravation of body of heater.At this moment need coking furnace shaft is repaired.Existing coke oven is repaired with fire-resistant sealing material, as U.S. Pat 4259120 patents " coke oven patching and sealing material ", form (wt%) by following component: 1. high-melting-point thing phase: one or more in silica brick, chamotte, magnesia or the high aluminium material, total add-on is 35～80%, 2. wedding agent: water glass 5～15%, 3. low-melting-point material phase: glass powder 10～20%, requiring the powder more than 90% is-100 orders.Add water 10～60% during construction, furnishing mud uses.Japanese Patent JP9078053 " Sealingmaterial for coke oven ", all raw materials are all less than 0.05mm, wherein account for more than 55% below the 0.002mm, these inorganic powder proportions are below 4.0, can be kaolin, agalmatolite, silica, talcum, clay, aluminum oxide etc., adopt wherein one or more as coke oven sealing material, and adding dispersion agent such as carboxymethyl cellulose, sodium polyacrylate etc., adding big water gaging, to make concentration be 30～60% mud, control mud viscosity 25～300cp can construct by pipe-line transportation.Chinese patent CN1212278A " sealing material for charging hole lid of coke oven ", be used to prevent that the slit discharges pollutants with the sealing material between charging hole lid of coke oven and seat, mainly form by 5～60% bio-diatomite powder and 40～95% ripe diatomite in powder, also be added with 5～15% gray clay, 0.2～2% Xylo-Mucine.Add water furnishing grout, be poured into slit between lid and seat.Analyze existing coke oven and repair with sealing to expect it all is with SiO
2-Al
2O
3Material is a main raw material, adds big water gaging furnishing mud, pours into a mould or smears and construct, and can have a negative impact for the coke oven silica brick under the hot state.
(3) summary of the invention
The object of the present invention is to provide a kind of coke oven to repair the fire-resistant dry powder sealing material of usefulness.This fire-resistant dry powder sealing material not only is used to repair coke oven furnace wall cracklin, brickwork joint, prolongs coke oven work-ing life, and can detect the body of heater stopping property; prevent the leakage of coke-oven gas, waste gas and pollutent etc.; help environment protection, and when construction is easy and simple to handle, the equipment that needs is simple.
The present invention is achieved in that the fire-resistant dry powder sealing of a kind of coke oven material, forms (weight %) by following component:
(1) silica, silica SiO
2Content 〉=94%, particle size are below the 0.5mm, and wherein the following fine powder of 0.074mm accounts for more than 70%, and weight % is 51～89%;
(2) useless silica brick powder, SiO
2Content 〉=93%, particle size≤0.074mm, weight % are 5～25%;
(3) feldspar, chemical ingredients: (Na
2O+K
2O)＞10%, Al
2O
3＞15%, all the other are SiO
2, particle size≤0.074mm, weight % are 5～20%;
(4) silicon powder, SiO
2Content 〉=90%, weight % are 1～5%.
The present invention compared with prior art has following beneficial effect:
1. the material composition is more reasonable.With silica and useless silica brick is main raw material, and composition and coke oven silica brick are approaching, and hot expansibility and silica brick are approaching, and higher fire performance and enough sintering strengths are arranged, and makes the anti-gas shock of material good.Can stick to the furnace wall wall well, blind, high volume is stable, does not peel off, and better long-term durability is arranged.
2. the material construction is simple.Do not need the scene to add water and stir the back use, do not bring any moisture into, the damage of having avoided water and water vapor that furnace wall is caused; Especially be fit to mechanized construction; Can not blowing out construct down, help coke oven longevity more hot.Slowly blow into coking chamber continuously as long as will seal material during construction, can reach and repair the slit purpose by pressurized air.
3. material applications is more extensive.Not only can repair less furnace wall crack and brickwork joint effectively, prolong the coke oven life-span, prevent that gas and pollutent from leaking, and helps protecting environment.In using this materials process, can also detect the integrity of whole body of heater.
(4) embodiment
Below the present invention is described in detail and provide specific embodiment.
The fire-resistant dry powder of coke oven sealing material main raw material is a very thin quartzy powder (particle size≤0.5mm).Quartz material is converted into tridymite in time more than 800 ℃, causes lattice dilatation, makes the microgroove " engagement " of brick inside.The present invention selects the natural silica of nature for use, and chemical ingredients mainly is SiO
2, silica in being subjected to thermal process, SiO
2Produce polymorphic transition change, volumetric expansion takes place, powder refractory brick border material contacted with it reacted, refractory brick is melted as a whole.Impurity can promote in the silica quartzy to tridymite conversion, particularly Na in the material
2O, CaO, Fe
2O
3The most effective.In the time of 870 ℃, it is 12.7% that alpha-quartz is converted into α-tridymite volumetric expansion, then is 17.4% when being converted into cristobalite, and volume change is very big.Require silica SiO
2Content 〉=94%, the following powder 100% of 0.5mm, wherein the following fine powder of 0.074mm accounts for more than 70%.Adding total amount is 51～89%.
Add the useless silica brick powder of part in the fire-resistant dry powder sealing of the coke oven material, can improve the adhesive property between sealing material and the coke oven silica brick greatly, also can reduce the material coefficient of thermal expansion rate in addition, the material thermostability is improved, can improve the conversion characteristic in the use of sealing material, produce cracking in preventing to transform, the tridymite degree improves, thereby improves material volume stability at high temperature.Require silica brick powder SiO
2Content 〉=93%, particle size is≤0.074mm.Can add the silica brick powder of fair amount according to the expansion and the conversion characteristic of main raw material silica, add-on is 5～25%.If add-on is too many, then is difficult to reach the hot expansibility of expection, and can increases material cost.
Under 1300 ℃ of use temperatures, the silica dry mash melts than infusibility and sticks to the silica brick surface, therefore must add the part fusing assistant.By repetition test research, in the fire-resistant dry powder sealing of coke oven material, add an amount of feldspar to be effective.Feldspar is the main flux raw material in glass, the Production of Ceramics, and not only melt temperature is low for it, and fusion range is wide.The liquid that its fusion forms can at high temperature dissolve a part of kaolin and quartz particles, promotes the porcelain reaction, and can reduce sintering temperature (can reduce about 100 ℃).The feldspar melt has bigger viscosity under the high temperature in addition, can play effect of high temperature thermoplastic and high temperature cementation, prevents high temperature deformation.In the fire-resistant dry powder sealing of coke oven material, adopt feldspar that the effect of well fluxing is arranged, can guarantee that also material has rational refractoriness.Require feldspar chemical ingredients (Na
2O+K
2O)＞10%, Al
2O
3＞15%, all the other are SiO
2, particle size≤0.074mm, add-on is 5～20%.Transform easily when making the silica heating, expansion is little and be difficult for loose.If add too much, sealing material refractoriness is significantly reduced, high-temperature behavior descends.
For acceleration of sintering, produce the part ceramic junction fast and close intensity, improve dry powder sealing material simultaneously and when pressurized air is blown into, in coking chamber, produce good suspension, add 1～5% silicon powder.Silicon powder requires its SiO
2Content 〉=90%.If add-on also can influence the high temperature use properties too much.
After above raw material mixes, can come into operation.The method of construction is earlier coke furnace carbonization chamber to be carried out vacantly, closes fire door, coaling hole and upcast, carries out the dry powder seal operation then.The dry powder tightness system is on the hole of coalingging at middle part, and the dry powder sealing material in the device is sent into coking chamber with pressurized air, and keeps certain pressure.Because this pressure and high temperature, superfine sealing material will be suspended in the middle of the coking chamber, and infiltrate in the brickwork joint of superfine crack and opening.The peephole flue dust is not emerged, and then the dry powder sealing finishes, and illustrates that also the stopping property of body of heater is good simultaneously.When coking chamber metope temperature was recovered, coke oven just can be coaling and be continued to use.
Embodiment
The component of the fire-resistant dry powder sealing of coke oven material is formed, and sees Table 1
Table 1
| Raw material | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 |
| Silica＜0.5mm | 85 | 70 | 55 | 85 | 72 |
| Useless silica brick powder≤0.074mm | 5 | 15 | 25 | 0 | 25 |
| Feldspar≤0.074mm | 5 | 12 | 19 | 12 | 0 |
| Silicon powder | 5 | 3 | 1 | 3 | 3 |
After above embodiment component mixed, put into crucible and pile up closely knitly naturally, carry out 1200 ℃ * 3h thermal treatment, take out sample then and carry out the physicals test, its performance sees Table 2.
Table 2
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 |
| Volume density, g/cm 3 | 1.28 | 1.30 | 1.31 | 1.32 | 1.35 |
| Apparent porosity, % | 45 | 43 | 42 | 48 | 46 |
| Compressive strength, MPa | 17.4 | 19.6 | 23.9 | 12.4 | 13.5 |
| Refractoriness, ℃ | 1670 | 1650 | 1630 | 1630 | 1710 |
| Coefficient of thermal expansion is in the time of %600 ℃ 1200 ℃ the time | 1.35 1.37 | 1.31 1.37 | 1.27 1.34 | 1.53 1.59 | 1.47 1.51 |
Because the composition of the fire-resistant dry powder sealing material component among the embodiment 1,2,3 has carried out scientific and reasonable collocation, over-all properties and raw materials cost have been taken into full account, embodiment 1,2,3 sample sintered compacts and not loose, higher intensity is arranged, refractoriness is all more than 1630 ℃, key is the thermal expansion behavior, with the thermal expansion basically identical of silica brick in the stove, can guarantee that the sealing material has long-term durability preferably.
And comparative example 1 does not add useless silica brick powder, and it is loose to burn the back sample, and it is big to expand, and cracking occurs, and intensity is also lower.Comparative example 2 does not add the fusing assistant feldspar, though the refractoriness height, sintering character is bad under the middle temperature, and thermal expansion is bigger, and intensity is also on the low side, finally can influence use properties.
After on probation, the coke oven stopping property after the repairing is good, uses normally, has reached good effect.
Claims (1)
1. the fire-resistant dry powder sealing of coke oven is expected, it is characterized in that forming (weight %) by following component:
(1) silica, silica SiO
2Content 〉=94%, particle size are below the 0.5mm, and wherein the following fine powder of 0.074mm accounts for more than 70%, and weight % is 51～89%;
(2) useless silica brick powder, SiO
2Content 〉=93%, particle size≤0.074mm, weight % are 5～25%;
(3) feldspar, chemical ingredients: (Na
2O+K
2O)＞10%, Al
2O
3＞15%, all the other are SiO
2, particle size≤0.074mm, weight % are 5～20%;
(4) silicon powder, SiO
2Content 〉=90%, weight % are 1～5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100176838A CN1318346C (en) | 2004-04-14 | 2004-04-14 | Refractory dry powder seal material for coke furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100176838A CN1318346C (en) | 2004-04-14 | 2004-04-14 | Refractory dry powder seal material for coke furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1683271A CN1683271A (en) | 2005-10-19 |
| CN1318346C true CN1318346C (en) | 2007-05-30 |
Family
ID=35262800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100176838A Expired - Lifetime CN1318346C (en) | 2004-04-14 | 2004-04-14 | Refractory dry powder seal material for coke furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1318346C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100457686C (en) * | 2007-07-18 | 2009-02-04 | 山西盂县西小坪耐火材料有限公司 | Semi-silica brick for 7.63-meter coke oven |
| CN100457687C (en) * | 2007-07-18 | 2009-02-04 | 山西盂县西小坪耐火材料有限公司 | Silicon brick for 7-meter coke oven |
| CN101219903B (en) * | 2007-12-05 | 2010-09-01 | 瑞泰科技股份有限公司 | Advanced silica refractory and manufacturing technique thereof |
| CN102391783A (en) * | 2011-09-15 | 2012-03-28 | 中国中轻国际工程有限公司 | Special sealing coating for gas flues and pipelines |
| CN104232110A (en) * | 2013-06-20 | 2014-12-24 | 宝山钢铁股份有限公司 | Sealing method of furnace body before primary coal charging of newly built coke furnace |
| CN109020575A (en) * | 2018-09-05 | 2018-12-18 | 云南濮耐昆钢高温材料有限公司 | A kind of silica fire resistant mud of useless silica brick production |
| CN110793994B (en) * | 2019-09-16 | 2022-02-22 | 河南中鸿集团煤化有限公司 | Method for testing performance of coke oven air compression sealing repair material |
| CN111943694B (en) * | 2020-07-29 | 2023-03-28 | 南京沪友冶金机械制造有限公司 | Automatic slurry pouring material for coke oven roof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63190155A (en) * | 1987-02-03 | 1988-08-05 | Nippon Steel Corp | Highly siliceous material for thermal spraying |
-
2004
- 2004-04-14 CN CNB2004100176838A patent/CN1318346C/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63190155A (en) * | 1987-02-03 | 1988-08-05 | Nippon Steel Corp | Highly siliceous material for thermal spraying |
Non-Patent Citations (1)
| Title |
|---|
| 宝钢焦炉炉修技术探讨 支晓明，宝钢技术，第5期 2001 * |
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| Publication number | Publication date |
|---|---|
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