CN103833384A - Magnesium ramming mass for repairing annular shaft kiln and preparation method thereof as well as method for repairing annular shaft kiln - Google Patents
Magnesium ramming mass for repairing annular shaft kiln and preparation method thereof as well as method for repairing annular shaft kiln Download PDFInfo
- Publication number
- CN103833384A CN103833384A CN201210484211.8A CN201210484211A CN103833384A CN 103833384 A CN103833384 A CN 103833384A CN 201210484211 A CN201210484211 A CN 201210484211A CN 103833384 A CN103833384 A CN 103833384A
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- CN
- China
- Prior art keywords
- particle diameter
- ramming mass
- magnesia
- repairing
- magnesium
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- 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.)
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 13
- 239000011777 magnesium Substances 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 40
- 239000011449 brick Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 26
- 239000002245 particle Substances 0.000 claims description 24
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 21
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 21
- 239000004571 lime Substances 0.000 claims description 21
- 239000000395 magnesium oxide Substances 0.000 claims description 20
- 210000002219 extraembryonic membrane Anatomy 0.000 claims description 12
- 229910052596 spinel Inorganic materials 0.000 claims description 10
- 239000011029 spinel Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- GANNOFFDYMSBSZ-UHFFFAOYSA-N [AlH3].[Mg] Chemical compound [AlH3].[Mg] GANNOFFDYMSBSZ-UHFFFAOYSA-N 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 150000003014 phosphoric acid esters Chemical class 0.000 claims description 3
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 3
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 3
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims 1
- 239000004576 sand Substances 0.000 abstract 5
- 238000009414 blockwork Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000008439 repair process Effects 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The invention relates to the field for repairing a lower sleeve refractory of an annular shaft kiln, in particular to magnesium ramming mass for repairing an annular shaft kiln and a preparation method thereof as well as a method for repairing the annular shaft kiln, which solve the problem for repairing and combining a novel blockwork in the repaired annular shaft kiln and original kiln body. The invention provides the magnesium ramming mass for repairing the annular shaft kiln. The magnesium ramming mass consists of magnesium sand with the granularity of 8mm to 5mm, magnesium sand with the granularity of 5mm to 3mm, magnesium sand with the granularity of 3mm to 1mm, magnesium sand with the granularity of less than 1mm, magnesium sand with the granularity of 0.074mm, aluminum oxide with the granularity of 0.074mm and metal aluminum, so that different repairing blocks can be customized according to the requirements and are applicable to the internal structure of a kiln body; the overall stress of the repaired kiln body is uniform, and the overall stress strength of the kiln body can be satisfied; the magnesium ramming mass is not obviously deformed in a retracting manner along the variation of the temperature, so that the dropping of a repaired part after the temperature is reduced can be avoided, and the repairing efficiency can be guaranteed.
Description
Technical field
The present invention relates to the resistance to material of annular lime kiln lower sleeve and repair field, particularly relate to a kind of magnesian ramming mass of repairing for annular lime kiln and preparation method thereof, and a kind of annular lime kiln restorative procedure.
Background technology
Current domestic annular lime kiln is being built by laying bricks or stones after end or kiln stage middle and later periods in age, because lower arch bridge temperature is higher, resistance to material be subject to for a long time material wash away or build by laying bricks or stones finish after dry kiln stage drying out curve arrange unreasonable, cause the resistance to material of the following part of arch bridge under lower inner sleeve to occur the situation that big area comes off, bring very large impact to production, must stop kiln and process.
In repair process, one of difficult point of existence is exactly the packing material of arch bridge and new masonry junction under How to choose, and its reason is: one, this junction is irregular, cannot go to repair with shaping material; Two, how to guarantee the whole force intensity that is subject to of building body by laying bricks or stones after repairing; Three, guarantee not come off after repairing, how to arrange and repair height.
Under sleeve kiln, under inner sleeve, the resistance to material of the following part of arch bridge adopts magnesium-aluminium spinel material substantially at present, this material can adapt to washing away of alkaline material (unslaked lime), but reheating linear change rate on reheating is very large,, in the time repairing, must consider, if it is improper to repair choice of material for this reason, in the time stopping kiln, kiln temperature declines, resistance to material shrinks, and repairing part may come off, and cannot reach reparation object.
Summary of the invention
The object of the invention is to for new repairing of building by laying bricks or stones between body and original kiln body in current annular lime kiln reparation, in conjunction with problem, a kind of magnesian ramming mass of repairing for annular lime kiln is provided, described magnesian ramming mass is mainly by the magnesia of 8 ~ 5mm particle diameter, the magnesia of 5 ~ 3mm particle diameter, the magnesia of 3 ~ 1mm particle diameter, the magnesia of the following particle diameter of 1mm, the magnesia of 0.074mm particle diameter and 0.074mm particle diameter aluminum oxide and metallic aluminium composition, the weight ratio of each composition is (5 ~ 10) above: (5 ~ 12): (16 ~ 23): (17 ~ 25): (18 ~ 28): (5 ~ 13): (0.1 ~ 3).
The preparation method who simultaneously the invention also discloses above-mentioned magnesian ramming mass, comprises the following steps:
(1) by the magnesia of the magnesia of the magnesia of the magnesia of the magnesia of 8 ~ 5mm particle diameter, 5 ~ 3mm particle diameter, 3 ~ 1mm particle diameter, the following particle diameter of 1mm, 0.074mm particle diameter and 0.074mm particle diameter aluminum oxide and metallic aluminium, according to (5 ~ 10): (5 ~ 12): (16 ~ 23): (17 ~ 25): (18 ~ 28): (5 ~ 13): the weight ratio of (0.1 ~ 3) mixes;
(2) add Sodium hexametaphosphate 99 and the phosphoric acid ester combined binder of the mixture 2 ~ 3.5% obtaining in step (1), mixing evenly;
(3) mixing magnesian ramming mass after is evenly made to bulk;
(4) piece obtaining in step (3) is heated gradually to 1100 ℃ of bakings, then naturally cooling, obtains compressive strength and reaches the magnesian ramming mass of 55Mpa.
According to concrete needs, magnesian ramming mass can be made to the bulk of corresponding size, according to contriver's experimental implementation repeatedly, disclose in the time making the piece of 70mm × 70mm × 70mm in described step (3), the reparation that is best suited for annular lime kiln is used.
Meanwhile, the present invention also further discloses a kind of annular lime kiln restorative procedure, comprises the following steps:
(1) set up scaffolding in the lower arch bridge bottom of annular lime kiln;
(2) on scaffolding, fixedly mount fetal membrane, guarantee that load does not occur for fetal membrane and arch bridge;
(3) the symmetrical bracket of installing;
(4) original resistance to material is removed;
(5) again build by laying bricks or stones, newly build by laying bricks or stones kiln body above, the ramming mass space of the reserved 25-35mm in the below of lower arch bridge, and newly build by laying bricks or stones kiln body above place the strawboard of 1mm;
(6) block ramming mass is inserted to ramming mass space, firmly tamping;
(7) maintenance 48 hours, completes reparation.
On above-mentioned disclosed basis, the concrete operation method that the present invention further discloses described step (4) is that first dismantling concrete collar tie beam to all resistance to material between backing ring is followed successively by the resistance to material that thermal insulation layer brick → five layer half NF2 internal layer insulating brick → P4 high-strength heat-insulating plate → tri-layer Z38/425 magnesium-aluminium spinel in the middle of remaining Z38/250 magnesium-aluminium spinel working lining → six layer NF1,1H10 recover this part and builds by laying bricks or stones.And then remove the resistance to material of backing ring top to arch springing bottom remnants, removing is successively the residual magnesium Alumina spinel brick of three layers of insulating brick and three layers of Z38/425.
Finally, for conventional annular lime kiln reparation, the invention discloses in step described above (2) the corresponding technical scheme that two fetal membranes are installed of each arch bridge.
Adopt after technical scheme disclosed in this invention, can customize as required different reparation pieces, thereby adapt to kiln body internal structure; Kiln body entirety after simultaneously repairing is stressed evenly, and the entirety that can meet kiln body is subject to force intensity; Moreover, not variation with temperature and obviously shrinkage strain of magnesian ramming mass disclosed by the invention, and then repair coming off of part after having avoided temperature to decline, guarantee the validity of repairing.
Embodiment
Below by embodiment, the present invention is further detailed.
The preparation of embodiment group 1 magnesian ramming mass
(1) according to each component and the weight part thereof shown in table 1, mix and make mixture.
(2) add Sodium hexametaphosphate 99 and the phosphoric acid ester combined binder of the mixture 2 ~ 3.5% obtaining in step (1), mixing evenly.
(3) mixing magnesian ramming mass after is evenly made to bulk; Particularly preferably be made in the present embodiment the piece of 70mm × 70mm × 70mm.
(4) piece obtaining in step (3) is heated gradually to 1100 ℃ of bakings, then naturally cooling, obtains compressive strength and reaches the magnesian ramming mass of 55Mpa.
Table 1 magnesian ramming mass moiety table
The reparation of embodiment 2 annular lime kilns
(1) set up scaffolding in the lower arch bridge bottom of annular lime kiln; Under scaffold building, when arch bridge bottom, adopt 12 road fetal membranes to stablize 6 lower arch bridges;
(2) on scaffolding, fixedly mount fetal membrane, when fetal membrane is installed, forbid and arch bridge generation load.Fetal membrane and scaffolding are fixing must be firmly, should be in the time that scaffolding use, above fetal membrane be subjected to displacement.
(3) after fetal membrane is all in place, the symmetrical bracket of installing; Bracket adopts 12*150*300(gusset 10*150) Q235B steel plate is made into; Selection of electrodes E40 welding rod; Before installing, first the insulating brick of bracket installation place is emptied, when construction, must be sent special messenger to observe each arch bridge state, pinpoint the problems and remove immediately people.
(4) after bracket all installs, the building construction again of removing resistance to material and resistance to material divides two portions to carry out, and first dismantling concrete collar tie beam to all resistance to material between backing ring is followed successively by the resistance to material that thermal insulation layer brick → five layer half NF2 internal layer insulating brick → P4 high-strength heat-insulating plate → tri-layer Z38/425 magnesium-aluminium spinel in the middle of remaining Z38/250 magnesium-aluminium spinel working lining → six layer NF1,1H10 recover this part and builds by laying bricks or stones.And then remove the resistance to material of backing ring top to arch springing bottom remnants, removing is successively the residual magnesium Alumina spinel brick of three layers of insulating brick and three layers of Z38/425 reparation rapidly.
(5) again build by laying bricks or stones, newly build by laying bricks or stones kiln body above, the ramming mass space of the reserved 25-35mm in the below of lower arch bridge, and newly build by laying bricks or stones kiln body above place the strawboard of 1mm;
(6) the block ramming mass obtaining in embodiment group 1 is inserted to ramming mass space, firmly tamping;
(7) maintenance 48 hours, completes reparation.
Can normally dry afterwards kiln.
Embodiment group 3 is repaired rear kiln body evaluation and test
Utilize kiln body after the magnesian ramming mass reparation that in embodiment of the present invention group 1, each moiety prepares, the crushing strength under high temperature of repairing rear kiln body is evaluated and tested, evaluation result is as shown in table 2 below.
Table 2
| Repair materials | After 1100 ℃ of bakings, be cooled to cold crushing strength (Mpa) |
| Embodiment 1-1 | 50.2 |
| Embodiment 1-2 | 51.8 |
| Embodiment 1-3 | 55.3 |
| Embodiment 1-4 | 52.4 |
| Embodiment 1-5 | 50.8 |
| Embodiment 1-6 | 49.4 |
| Embodiment 1-7 | 45.8 |
| Embodiment 1-8 | 55.6 |
| Embodiment 1-9 | 50.3 |
| Embodiment 1-10 | 52.6 |
| Embodiment 1-11 | 53.2 |
| Embodiment 1-12 | 52.9 |
| Embodiment 1-13 | 51.0 |
| Embodiment 1-14 | 49.8 |
| Embodiment 1-15 | 56.1 |
| Embodiment 1-16 | 53.6 |
| Embodiment 1-17 | 55.2 |
| Embodiment 1-18 | 50.2 |
As can be seen from the above table, by restorative procedure disclosed in this invention, do not need to remove annular lime kiln, utilize magnesian ramming mass to fill the rear requirement of withstand voltage that just can reach sleeve kiln, form a kind of brand-new annular lime kiln restorative procedure.
The above is the specific embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (6)
1. a magnesian ramming mass of repairing for annular lime kiln, it is characterized in that described magnesian ramming mass mainly by: the magnesia of the magnesia of the magnesia of 8 ~ 5mm particle diameter, the magnesia of 5 ~ 3mm particle diameter, 3 ~ 1mm particle diameter, the magnesia of the following particle diameter of 1mm, 0.074mm particle diameter and 0.074mm particle diameter aluminum oxide and metallic aluminium form, and the weight ratio of above each composition is (5 ~ 10): (5 ~ 12): (16 ~ 23): (17 ~ 25): (18 ~ 28): (5 ~ 13): (0.1 ~ 3).
2. a preparation method for magnesian ramming mass as described in claim 1, is characterized in that comprising the following steps:
(1) by the magnesia of the magnesia of the magnesia of the magnesia of the magnesia of 8 ~ 5mm particle diameter, 5 ~ 3mm particle diameter, 3 ~ 1mm particle diameter, the following particle diameter of 1mm, 0.074mm particle diameter and 0.074mm particle diameter aluminum oxide and metallic aluminium, according to (5 ~ 10): (5 ~ 12): (16 ~ 23): (17 ~ 25): (18 ~ 28): (5 ~ 13): the weight ratio of (0.1 ~ 3) mixes;
(2) add Sodium hexametaphosphate 99 and the phosphoric acid ester combined binder of the mixture 2 ~ 3.5% obtaining in step (1), mixing evenly;
(3) mixing magnesian ramming mass after is evenly made to bulk;
(4) piece obtaining in step (3) is heated gradually to 1100 ℃ of bakings, then naturally cooling, obtains compressive strength and reaches the magnesian ramming mass of 55Mpa.
3. according to the preparation method described in claim 2, it is characterized in that: the piece of making 70mm × 70mm × 70mm in described step (3).
4. an annular lime kiln restorative procedure, is characterized in that comprising the following steps:
(1) set up scaffolding in the lower arch bridge bottom of annular lime kiln;
(2) on scaffolding, fixedly mount fetal membrane, guarantee that load does not occur for fetal membrane and arch bridge;
(3) the symmetrical bracket of installing;
(4) original resistance to material is removed;
(5) again build by laying bricks or stones, newly build by laying bricks or stones kiln body above, the ramming mass space of the reserved 25-35mm in the below of lower arch bridge, and newly build by laying bricks or stones kiln body above place the strawboard of 1mm;
(6) block ramming mass is inserted to ramming mass space, firmly tamping;
(7) maintenance 48 hours, completes reparation.
5. according to the annular lime kiln restorative procedure described in claim 4, the concrete operation method that it is characterized in that described step (4) is that first dismantling concrete collar tie beam to all resistance to material between backing ring is followed successively by the resistance to material that thermal insulation layer brick → five layer half NF2 internal layer insulating brick → P4 high-strength heat-insulating plate → tri-layer Z38/425 magnesium-aluminium spinel in the middle of remaining Z38/250 magnesium-aluminium spinel working lining → six layer NF1,1H10 recover this part and builds by laying bricks or stones;
And then remove the resistance to material of backing ring top to arch springing bottom remnants, removing is successively the residual magnesium Alumina spinel brick of three layers of insulating brick and three layers of Z38/425.
6. annular lime kiln restorative procedure according to claim 4, is characterized in that in described step (2), two fetal membranes of the corresponding installation of each arch bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210484211.8A CN103833384B (en) | 2012-11-26 | 2012-11-26 | A kind of magnesian ramming mass for annular lime kiln reparation and preparation method thereof, and a kind of annular lime kiln restorative procedure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210484211.8A CN103833384B (en) | 2012-11-26 | 2012-11-26 | A kind of magnesian ramming mass for annular lime kiln reparation and preparation method thereof, and a kind of annular lime kiln restorative procedure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103833384A true CN103833384A (en) | 2014-06-04 |
| CN103833384B CN103833384B (en) | 2016-04-13 |
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| CN201210484211.8A Expired - Fee Related CN103833384B (en) | 2012-11-26 | 2012-11-26 | A kind of magnesian ramming mass for annular lime kiln reparation and preparation method thereof, and a kind of annular lime kiln restorative procedure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104177102A (en) * | 2014-08-28 | 2014-12-03 | 洛阳利尔耐火材料有限公司 | Furnace bottom ramming material of RH refining furnace |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113101A (en) * | 2007-06-30 | 2008-01-30 | 河南省新密市荣耀炉料有限公司 | Magnesium gunning refractory for copper smelting-furnace |
| CN102515795A (en) * | 2011-12-08 | 2012-06-27 | 山西高科耐火材料股份有限公司 | Steel ladle bottom hot repair material |
-
2012
- 2012-11-26 CN CN201210484211.8A patent/CN103833384B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113101A (en) * | 2007-06-30 | 2008-01-30 | 河南省新密市荣耀炉料有限公司 | Magnesium gunning refractory for copper smelting-furnace |
| CN102515795A (en) * | 2011-12-08 | 2012-06-27 | 山西高科耐火材料股份有限公司 | Steel ladle bottom hot repair material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104177102A (en) * | 2014-08-28 | 2014-12-03 | 洛阳利尔耐火材料有限公司 | Furnace bottom ramming material of RH refining furnace |
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