CN107540396A - A kind of castable suitable for fluidized bed furnace furnace bottom - Google Patents
A kind of castable suitable for fluidized bed furnace furnace bottom Download PDFInfo
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- CN107540396A CN107540396A CN201710848133.8A CN201710848133A CN107540396A CN 107540396 A CN107540396 A CN 107540396A CN 201710848133 A CN201710848133 A CN 201710848133A CN 107540396 A CN107540396 A CN 107540396A
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- fluidized bed
- castable
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Abstract
The present invention discloses a kind of castable suitable for fluidized bed furnace furnace bottom, consists of the following components in percentage by weight：Component A 55~65%, B component 35~45%, the component A comprise the following raw materials by weight percent：Alumina powder 50 ~ 60%, magnesia powder 15 ~ 25%, Ti corundum 4 ~ 14%, aluminous cement 11 ~ 21%, the B component are made up of the raw material below with percentage by weight：Suspending agent 33 ~ 42%, binding agent 58 ~ 67%.The castable of the present invention solves the maintenance of fluidized bed furnace furnace bottom and uses refractory brick, the problem of time-consuming for construction, costly, short life etc., castable directly contacts with annular brick surface after cast, integrated poured shaping, slitless connection, prevent from perforating, further increase the utilization rate of fuel, the carbon brick that seriously carbonizes of part need to be only removed after construction carry out reparation to be continuing with, and reduce production cost, improve fluidized bed furnace furnace bottom service life.
Description
Technical field
The present invention relates to a kind of refractory material, and in particular to a kind of castable suitable for fluidized bed furnace furnace bottom.
Background technology
During long-term production, the bulk cargo layer that fluidized bed furnace masonry of well is subject to is due to expanding, wriggling, after causing fluidisation
Pellet stirs up and down, constantly washes away fluidized bed furnace furnace bottom, gradually corrodes fluidized bed furnace furnace bottom, shortens the service life of fluidized bed furnace.
At present, fluidized bed furnace furnace bottom maintenance typically carries first trimester above order-furnace bottom refractory brick, from blowing out to having built by laying bricks or stones
2 months are needed into the maintenance of blow-on again, it is long, costly that whole furnace hearth material all changes the repair time.Therefore, how to contract
The repair time of short fluidized bed furnace furnace bottom, accomplish both to use material less, and time and labour saving, the expense of maintenance is reduced, turns into fluidized bed furnace stove
One new key subjects of bottom fire resisting material field.
The content of the invention
Present invention aims at provide a kind of castable suitable for fluidized bed furnace furnace bottom.
Based on above-mentioned purpose, the present invention takes following technical scheme：
A kind of castable suitable for fluidized bed furnace furnace bottom, consist of the following components in percentage by weight：Component A 55~65%, B groups
Divide 35~45%, the component A comprises the following raw materials by weight percent：Alumina powder 50 ~ 60%, magnesia powder 15 ~ 25%,
Ti corundum 4 ~ 14%, aluminous cement 11 ~ 21%, the B component are made up of the raw material below with percentage by weight：Suspending agent 33 ~
42%th, binding agent 58 ~ 67%.
The granularity of the alumina powder is 50-300 mesh, and the bulk density of the alumina powder is 2.7g/cm3。
The granularity of the magnesia powder is 50-300 mesh, and the activity of magnesia powder is 60-68%, the volume of magnesia powder
Density 3.58g/cm3。
The granularity of the aluminous cement is 20-150 mesh, and the compressive resistance of aluminous cement is 80 Mpa, the aluminic acid
1700 DEG C of the refractoriness ＞ of calcium cement.
The fusing point of the Ti corundum is 1860 DEG C, Mohs' hardness 7-7.5, and the mass percent composition of the Ti corundum is
Al2O3 46%、TiO2The particle diameter of 54%, Ti corundum is 0-5mm, and its proportion is 3.43-3.95.
Wherein：Al in alumina powder2O3Weight/mass percentage composition >=99.6%, Fe2O3Weight/mass percentage composition≤
0.2%；MgO weight/mass percentage composition >=92% in magnesia powder, purchased from Shandong Yantai Laizhou Wei Pengmei industry Co., Ltd；Aluminic acid
Calcium cement is pure calcium aluminate cement, the superelevation aluminium profiles pure calcium aluminate cement produced purchased from Zhengzhou Great Wall special cement Co., Ltd
（Al2O3 80%）；Suspending agent is " antisettling agent ", purchased from Guangzhou Fei Rui Chemical Co., Ltd.s, model SF-1；Binding agent is resistance to
Hot bi-component waterborne binding agent, purchased from upper sea blue pa new material Science and Technology Ltd..
A kind of castable suitable for fluidized bed furnace furnace bottom, it can be made by following methods：The raw material of component A and B component is pressed
Corresponding proportion prepares, and mixes respectively, then being put into component A and B component after mixer is stirred mixing, packaging.
Compared with prior art, the invention has the advantages that：
1st, castable of the invention solves the maintenance of fluidized bed furnace furnace bottom and use refractory brick, and constructing, time-consuming, costly, short life etc.
The problem of, castable directly contacts with annular brick surface after cast, integrated poured shaping, slitless connection, prevents from perforating, further
The utilization rate of fuel is improved, the carbon brick that seriously carbonizes of part need to be only removed after construction carry out reparation to be continuing with, and reduce
Production cost, improves fluidized bed furnace furnace bottom service life；
2nd, castable of the invention has stronger oxidative attack, good thermal shock resistance, scour resistance, slag-resistant
The advantages that, solve the problems, such as steel decarburization in rolling process；
3rd, castable of the invention is after the cast of fluidized bed furnace furnace bottom, and in use, no toxic gas, dust escape fluidized bed furnace
Go out, noiseless, reduce environmental pollution, be advantageous to environmental protection, and operation is convenient, social benefit is notable.
Embodiment
In embodiment 1-4, the granularity of alumina powder is 50-300 mesh, and the bulk density of alumina powder is 2.7g/cm3。
The granularity of magnesia powder is 50-300 mesh, and the activity of magnesia powder is 60-68%, the bulk density of magnesia powder
3.58g/cm3。
The granularity of aluminous cement is 20-150 mesh, and the compressive resistance of aluminous cement is 80 Mpa, aluminous cement
1700 DEG C of refractoriness ＞.
The fusing point of Ti corundum is 1860 DEG C, the mass percent of Mohs' hardness 7-7.5, Ti corundum composition is Al2O3
46%、TiO2The particle diameter of 54%, Ti corundum is 0-5mm, and its proportion is 3.43-3.95.
Embodiment 1
A kind of castable suitable for fluidized bed furnace furnace bottom, consist of the following components in percentage by weight：Component A 55%, B component
45%, the component A comprises the following raw materials by weight percent：Alumina powder 50%, magnesia powder 15%, Ti corundum 14%, aluminium
Sour calcium cement 21%, the B component are made up of the raw material below with percentage by weight：Suspending agent 33%, binding agent 67%.
Embodiment 2
A kind of castable suitable for fluidized bed furnace furnace bottom, consist of the following components in percentage by weight：Component A 57%, B component
43%, the component A comprises the following raw materials by weight percent：Alumina powder 52%, magnesia powder 25%, Ti corundum 4%, aluminic acid
Calcium cement 19%, the B component are made up of the raw material below with percentage by weight：Suspending agent 37%, binding agent 63%.
Embodiment 3
A kind of castable suitable for fluidized bed furnace furnace bottom, consist of the following components in percentage by weight：Component A 60%, B component
40%, the component A comprises the following raw materials by weight percent：Alumina powder 56%, magnesia powder 20%, Ti corundum 8%, aluminic acid
Calcium cement 16%, the B component are made up of the raw material below with percentage by weight：Suspending agent 40%, binding agent 60%.
Embodiment 4
A kind of castable suitable for fluidized bed furnace furnace bottom, consist of the following components in percentage by weight：Component A 65%, B component
35%, the component A comprises the following raw materials by weight percent：Alumina powder 60%, magnesia powder 19%, Ti corundum 10%, aluminium
Sour calcium cement 11%, the B component are made up of the raw material below with percentage by weight：Suspending agent 42%, binding agent 58%.
The embodiment 1-4 castable suitable for fluidized bed furnace furnace bottom, is made by following methods：By component A and the original of B component
Material is prepared by corresponding proportion, is mixed respectively, then being put into component A and B component after mixer is stirred mixing, and packaging is
Can.
Castable made from embodiment 1-4 comprises the following steps in the construction method of fluidized bed furnace furnace bottom moulding by casting：
1) fluidized bed furnace stove stockline dropping blowing out, net clinker is gone out；
2）Judge to need the residual thickness of the liner degree of carbon brick cleared up, it is necessary to what is retained can be with protective demolition, the destructiveness that need not retain
Carbon brick is removed, judges that furnace bottom needs the thickness retained during cleaning；
3）Because the material has self drainage, poured into a mould by the way of pumping；
4）After furnace bottom is integrated poured can baker, furnace drying time 20-28h.
Physical and chemical index made from embodiment 1-4 measured by castable, as shown in table 1.
1st, castable of the invention solves the maintenance of fluidized bed furnace furnace bottom and use refractory brick, and constructing, time-consuming, costly, short life etc.
The problem of, castable directly contacts with annular brick surface after cast, integrated poured shaping, slitless connection, prevents from perforating, further
The utilization rate of fuel is improved, the carbon brick that seriously carbonizes of part need to be only removed after construction carry out reparation to be continuing with, and reduce
Production cost（Cost can reduce by 30%）, improve fluidized bed furnace furnace bottom service life；
2nd, castable of the invention has stronger oxidative attack, good thermal shock resistance, scour resistance, slag-resistant
The advantages that, solve the problems, such as steel decarburization in rolling process；
3rd, castable of the invention is after the cast of fluidized bed furnace furnace bottom, and in use, no toxic gas, dust escape fluidized bed furnace
Go out, noiseless, reduce environmental pollution, be advantageous to environmental protection, and operation is convenient, social benefit is notable.
Claims (5)
1. a kind of castable suitable for fluidized bed furnace furnace bottom, it is characterised in that consist of the following components in percentage by weight：A groups
Divide 55~65%, B component 35~45%, the component A comprises the following raw materials by weight percent：Alumina powder 50 ~ 60%,
Magnesia powder 15 ~ 25%, Ti corundum 4 ~ 14%, aluminous cement 11 ~ 21%, the B component is by below with the raw material of percentage by weight
Composition：Suspending agent 33 ~ 42%, binding agent 58 ~ 67%.
2. it is applied to the castable of fluidized bed furnace furnace bottom as claimed in claim 1, it is characterised in that the granularity of the alumina powder
For 50-300 mesh, the bulk density of the alumina powder is 2.7g/cm3。
3. it is applied to the castable of fluidized bed furnace furnace bottom as claimed in claim 1, it is characterised in that the granularity of the magnesia powder
For 50-300 mesh, the activity of magnesia powder is 60-68%, the bulk density 3.58g/cm of magnesia powder3。
4. it is applied to the castable of fluidized bed furnace furnace bottom as claimed in claim 1, it is characterised in that the grain of the aluminous cement
Spend for 20-150 mesh, the compressive resistance of aluminous cement is 80 Mpa.
5. it is applied to the castable of fluidized bed furnace furnace bottom as claimed in claim 1, it is characterised in that the fusing point of the Ti corundum is
1860 DEG C, Mohs' hardness 7-7.5, the mass percent composition of the Ti corundum is Al2O3 46%、TiO254%, Ti corundum
Particle diameter is 0-5mm, and its proportion is 3.43-3.95.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017106867894 | 2017-08-11 | ||
| CN201710686789 | 2017-08-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107540396A true CN107540396A (en) | 2018-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710848133.8A Pending CN107540396A (en) | 2017-08-11 | 2017-09-19 | A kind of castable suitable for fluidized bed furnace furnace bottom |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101407425A (en) * | 2008-10-24 | 2009-04-15 | 浙江锦诚耐火材料有限公司 | Corundum spinelle kilneye fire resistant pouring material |
| CN101891485A (en) * | 2009-05-21 | 2010-11-24 | 宝山钢铁股份有限公司 | Pouring material for steel ladle |
-
2017
- 2017-09-19 CN CN201710848133.8A patent/CN107540396A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101407425A (en) * | 2008-10-24 | 2009-04-15 | 浙江锦诚耐火材料有限公司 | Corundum spinelle kilneye fire resistant pouring material |
| CN101891485A (en) * | 2009-05-21 | 2010-11-24 | 宝山钢铁股份有限公司 | Pouring material for steel ladle |
Non-Patent Citations (1)
| Title |
|---|
| 纪玉玲译: "添加氧化镁或尖晶石对氧化铝系浇注料的影响", 《国外耐火材料》 * |
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Application publication date: 20180105 |