CN105272271A - Repairing material of magnesium aluminate spinel bricks for lime sleeve kiln burners - Google Patents
Repairing material of magnesium aluminate spinel bricks for lime sleeve kiln burners Download PDFInfo
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- CN105272271A CN105272271A CN201410248690.2A CN201410248690A CN105272271A CN 105272271 A CN105272271 A CN 105272271A CN 201410248690 A CN201410248690 A CN 201410248690A CN 105272271 A CN105272271 A CN 105272271A
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- repair material
- magnesium aluminate
- aluminate spinel
- sleeve kiln
- repairing material
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Abstract
The invention relates to a repairing material of magnesium aluminate spinel bricks for lime sleeve kiln burners. The technical problems of low melting point and poor erosion resistance of present repaired cracked magnesium aluminate spinel bricks for lime sleeve kiln burners are solved. A technical scheme adopted in the invention is characterized in that the repairing material of magnesium aluminate spinel bricks for lime sleeve kiln burners comprises, by weight, 35-45% of periclase, 25-35% of sintered magnesia, 17-29% of magnesium chloride hexahydrate, 3-4% of ultrafine alumina powder and 2-3% of anhydrous resin. The repairing material is mainly used for repairing the magnesium aluminate spinel bricks for lime sleeve kiln burners. The service life of the magnesium aluminate spinel bricks for lime sleeve kiln burners, repaired by using the repairing material, is prolonged above 2 times.
Description
Technical field
The present invention relates to a kind of repair material used for refractory material, particularly a kind of sleeve lime kiln burner Mg-Al spinel brick repair material.
Background technology
The magnesium-aluminium spinel brick masonry that the working lining of current home and abroad sleeve lime kiln burner all adopts forms, by the impact of the operating modes such as limestone kiln rapid heat cycle, the Mg-Al spinel brick at this position easily ftractures, and then affect the normal production of sleeve lime kiln, how effectively repairing is carried out to Mg-Al spinel brick become people's problem in urgent need to solve.In prior art, carry out meeting with common bonding agent aluminous cement and bring impurity calcium to Mg-Al spinel brick and because of the low easy formation liquid phase of its fusing point under high temperature, thus affect the erosion-resisting characteristics of material.
Chinese patent CN201210178056.7, name is called, a kind of Castable for permanent layer of steel ladle, disclose a kind of not containing the mould material of chromium, by fused mullite 40 ~ 50%, electrofused mullite 10 ~ 15%, corundum 15 ~ 20%, ultra-fine alumina powder 5 ~ 10%, silicon oxide ultrafine powder 5 ~ 10%, pure calcium aluminate cement 6 ~ 8%, pearl 2.2 ~ 4.0% is formed in drift, but its goal of the invention is the ladle weight that the large thermal conductivity height of Castable for permanent layer of steel ladle volume density solving prior art produces to be increased and then increases transportation equipment load, the technical problem that the large energy loss of molten steel temperature drop is many, this mould material does not have the aggressiveness of resistance to molten steel.
In prior art, Chinese patent CN201310247699.7A, name is called, a kind of RH stove Chrome-free Mg-Al spinel brick repair material, and it is primarily of material compositions such as periclasite, magnesite clinker, magnesium chloride hexahydrate, setting accelerator, this material cohesiveness when just using is poor, the resistance to material that repair material repaiies position with institute is difficult to preliminary bonding, and repairing is got on and easily peeled off, and makes material use efficiency low, repair efficiency is more difficult ideal also, needs to strengthen its preliminary adhesive property.
Summary of the invention
The object of this invention is to provide a kind of sleeve lime kiln burner Mg-Al spinel brick repair material, solve existing sleeve lime kiln burner Mg-Al spinel brick and open the technical problem that operated cleft fusing point is low, erosion-resisting characteristics is poor.
The technical solution used in the present invention is:
A kind of sleeve lime kiln burner Mg-Al spinel brick repair material, the weight percent of its feed composition is: periclasite 35% ~ 45%, magnesite clinker 25% ~ 35%, magnesium chloride hexahydrate 17% ~ 29%, ultra-fine alumina powder 3% ~ 4%, waterless resin 2% ~ 3%.
Because limestone kiln burner block is alkaline matter, be Mg-Al spinel brick, therefore, the main component of all resistance to materials based on alkaline matter, to prevent the reaction of alkaline matter and acidic substance.
The present invention selects alkaline matter periclasite and magnesite clinker as the aggregate of repair material, and total composition accounts for 60% ~ 80%.Periclasite and magnesite clinker are all the oxide compounds of magnesium, and magnesite clinker forms through high-temperature calcination primarily of magnesite, water magnesium ore deposit or the magnesium hydroxide that extracts from seawater, and its MgO activity degree is high, and the price of magnesite clinker is relatively high; Periclasite mainly produces in marble, and being that rhombspar is at high temperature rotten is formed, and its fusing point is 2800 DEG C, and its price is relatively cheap.Because magnesian does not have plasticity-, if the too high levels of periclasite and magnesite clinker in ramming mass, then constructional difficulties; If content is too low, material property then changes, and effectively can not resist the erosion of molten steel.But only use magnesite clinker as repairing aggregate, then cost is higher; Through experiment, adopt periclasite and magnesite clinker mixture as the aggregate of repair material, at high temperature can sinter entirety into Mg-Al spinel brick, the requirement of limestone kiln Mg-Al spinel brick performance can be met; Can getting a desired effect simultaneously, cost is more reasonable again; For the ease of construction, repair material particle diameter≤1cm is advisable.
In order to early stage adhesive property repaired by strongthener, do not increase the water content of material simultaneously, select waterless resin as binding agent in the present invention, so that material and the brick repaired have certain cohesiveness at a touch, its content is not easily too high, Ruo Taigao, then its viscosity is had a surplus but insufficient strength, and general control is advisable 2 ~ 3%.
After repair material and the required brick repaiied bond, the resistance to material with some strength can be formed fast overall to make the brick of repair material and repairing, adopt magnesium chloride hexahydrate and ultra-fine alumina powder as the bonding agent of repair material, this repair material add water stir time, magnesium chloride hexahydrate can produce Mg
2+, Cl
-, and OH
-ion will reach the supersaturation concentration of chlorine oxygen magnesium hydrate crystallization, starts the reaction of following crystallization occurs:
6Mg
2++2Cl
-+10OH
-+8H
2O=5Mg(OH)
2
· MgCl
2
· 8H
2O
Under normal temperature, the reaction of this crystallization can spontaneously be carried out, and can discharge the reaction of the chemistry torrid zone in reaction process and continue to carry out, fine fraction can gelation gradually, and repair material system starts to produce intensity, finally occurs setting and harden.
Magnesium chloride hexahydrate and ultra-fine alumina powder have certain resistance to low temperature, magnesium chloride hexahydrate as antifreezing agent, can to repair material provide under low temperature can workability.Forming refractoriness after using in repair material of the present invention, to reach the magnesium refractory of 2100 DEG C overall and free from foreign meter, thus ensure that the erosion-resistant applied at elevated temperature performance of repairing refractory.
Preparation and the constructional method of repair material of the present invention are:
During preparation repair material, the first step first carries out brokenly pulverizing to periclasite and magnesite clinker, filters out the particle of particle diameter≤1cm as aggregate; Magnesium chloride hexahydrate, ultra-fine alumina powder, waterless resin are carried out weigh batching by second step; The periclasite of broken pulverizing, magnesite clinker and magnesium chloride hexahydrate, setting accelerator are mixed 6 ~ 10 minutes and obtain finished product by the 3rd step in mixing pan, then are loaded in finished bag by finished product and encapsulate.
During repairing work, mix add a certain amount of water in repair material after, amount of water is 5 ~ 6% of repair material total mass, then the rear repair material of the mixing that will add water is filled into Mg-Al spinel brick cracking place, with scraper as auxiliary means, after making it fully fill, after resting 24 hours, more namely complete repairing after toasting according to Mg-Al spinel brick baking curve.
The present invention has following positively effect compared to existing technology:
1. after the crack of repair material of the present invention to sleeve lime kiln burner Mg-Al spinel brick is repaired, forming refractoriness, to reach the magnesium refractory of more than 2100 DEG C overall and free from foreign meter, thus ensure that the erosion-resistant applied at elevated temperature performance of repairing refractory, the performance after repairing can reach previous level.
2. the use of repair material of the present invention, makes extend more than 2 times the work-ing life of sleeve lime kiln burner Mg-Al spinel brick.
Embodiment
A kind of sleeve lime kiln burner Mg-Al spinel brick repair material, the weight percent of its feed composition is: periclasite 35% ~ 45%, magnesite clinker 25% ~ 35%, magnesium chloride hexahydrate 17% ~ 29%, ultra-fine alumina powder 3% ~ 4%, waterless resin 2% ~ 3%.The embodiment of the present invention sees the following form.
Sleeve lime kiln burner Mg-Al spinel brick repair material embodiment table
Preparation and the constructional method of repair material of the present invention are:
During preparation repair material, the first step first carries out brokenly pulverizing to periclasite and magnesite clinker, filters out the particle of particle diameter≤1cm as aggregate; Magnesium chloride hexahydrate, ultra-fine alumina powder, waterless resin are carried out weigh batching by second step; The mixing in, waterless resin mixing pan of the periclasite of broken pulverizing, magnesite clinker and magnesium chloride hexahydrate, setting accelerator is obtained finished product in 6 ~ 10 minutes by the 3rd step, then is loaded in finished bag by finished product and encapsulate.Wherein, magnesium chloride hexahydrate selects Shandong Shouguang City spring to become the product of dynamo-electric Chemical Co., Ltd., and the product of Xuzhou Yi Chuan Chemical Industry Science Co., Ltd selected by setting accelerator, and waterless resin selects Qingdao along the product of Chemical Co., Ltd. of speeding.
During repairing work, mix add a certain amount of water in repair material after, amount of water is 5 ~ 6% of repair material total mass, then the repair material after mixing that will add water is filled into Mg-Al spinel brick and comes off place, with scraper as auxiliary means, after making it fully fill, after resting 24 hours, then carry out toasting namely completing repairing according to Mg-Al spinel brick baking curve.
Adopt repair material of the present invention to after the crack repairing of sleeve lime kiln burner Mg-Al spinel brick, make more than 2 times that reach original design service life the work-ing life of Mg-Al spinel brick, the work-ing life and the limestone kiln maintenance cycle that achieve sleeve lime kiln burner Mg-Al spinel brick match.
Claims (5)
1. a sleeve lime kiln burner Mg-Al spinel brick repair material, the weight percent of its feed composition is: periclasite 35% ~ 45%, magnesite clinker 25% ~ 35%, magnesium chloride hexahydrate 17% ~ 29%, ultra-fine alumina powder 3% ~ 4%, waterless resin 2% ~ 3%.
2. sleeve lime kiln burner Mg-Al spinel brick repair material as claimed in claim 1, the weight percent of its feed composition is: periclasite 35%, magnesite clinker 32%, magnesium chloride hexahydrate 27%, ultra-fine alumina powder 3%, waterless resin 3%.
3. sleeve lime kiln burner Mg-Al spinel brick repair material as claimed in claim 1, the weight percent of its feed composition is: periclasite 42%, magnesite clinker 35%, magnesium chloride hexahydrate 17%, ultra-fine alumina powder 4%, waterless resin 2%.
4. sleeve lime kiln burner Mg-Al spinel brick repair material as claimed in claim 1, the weight percent of its feed composition is: periclasite 45%, magnesite clinker 25%, magnesium chloride hexahydrate 25%, ultra-fine alumina powder 3%, waterless resin 2%.
5. sleeve lime kiln burner Mg-Al spinel brick repair material as claimed in claim 1, is characterized in that, described periclasite and magnesite clinker particle diameter≤1cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248690.2A CN105272271A (en) | 2014-06-06 | 2014-06-06 | Repairing material of magnesium aluminate spinel bricks for lime sleeve kiln burners |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248690.2A CN105272271A (en) | 2014-06-06 | 2014-06-06 | Repairing material of magnesium aluminate spinel bricks for lime sleeve kiln burners |
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|---|---|
| CN105272271A true CN105272271A (en) | 2016-01-27 |
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|---|---|---|---|
| CN201410248690.2A Pending CN105272271A (en) | 2014-06-06 | 2014-06-06 | Repairing material of magnesium aluminate spinel bricks for lime sleeve kiln burners |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515805A (en) * | 2011-12-23 | 2012-06-27 | 中钢集团洛阳耐火材料研究院有限公司 | Magnesian refractory castable binding agent |
| CN103408311A (en) * | 2013-07-31 | 2013-11-27 | 南京梅山冶金发展有限公司 | Gunning mix for repairing RH refractory brick |
| CN103508740A (en) * | 2012-06-29 | 2014-01-15 | 上海梅山钢铁股份有限公司 | Ramming mass for repairing gap bridge magnesia-alumina spinel bricks of sleeve lime kiln |
-
2014
- 2014-06-06 CN CN201410248690.2A patent/CN105272271A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515805A (en) * | 2011-12-23 | 2012-06-27 | 中钢集团洛阳耐火材料研究院有限公司 | Magnesian refractory castable binding agent |
| CN103508740A (en) * | 2012-06-29 | 2014-01-15 | 上海梅山钢铁股份有限公司 | Ramming mass for repairing gap bridge magnesia-alumina spinel bricks of sleeve lime kiln |
| CN103408311A (en) * | 2013-07-31 | 2013-11-27 | 南京梅山冶金发展有限公司 | Gunning mix for repairing RH refractory brick |
Non-Patent Citations (1)
| Title |
|---|
| 郭海珠 等: "《实用耐火原料手册》", 30 September 2000 * |
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Application publication date: 20160127 |
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