CN104140279A - Refractory material for rotary kiln and preparing method thereof - Google Patents
Refractory material for rotary kiln and preparing method thereof Download PDFInfo
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- CN104140279A CN104140279A CN201410375825.1A CN201410375825A CN104140279A CN 104140279 A CN104140279 A CN 104140279A CN 201410375825 A CN201410375825 A CN 201410375825A CN 104140279 A CN104140279 A CN 104140279A
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Abstract
The invention relates to a refractory material for a rotary kiln and a preparing method thereof and belongs to the technical field of refractory materials. The refractory material comprises, by weight, 20-25 parts of beta-SiC, 8-15 parts of needle coke, 60-70 parts of porous periclase-magnesium aluminate spinel ceramic fine powder, 2-5 parts of silica powder, 2-5 parts of floating bead, 3-5 parts of alumina fibre, 7-10 parts of boron carbide powder and 2-5 parts of binding agent. The method for preparing the refractory material for the rotary kiln is simple and reliable, the prepared refractory material has the advantage of being high in compression strength, wear resistance, thermal shock performance and medium erosion resistance, construction is convenient, the service life of the refractory material for the rotary kiln is prolonged greatly, normal production of an enterprise is guaranteed, maintenance time is shortened to the maximum degree, and maintenance cost is reduced to the maximum degree.
Description
Technical field
The invention belongs to technical field of refractory materials, be specifically related to a kind of revolution kiln refractory and preparation method thereof.
Background technology
Rotary kiln refers to rotary calcining kiln, is commonly called as rotary kiln, belongs to building equipment class.Rotary kiln can be divided into cement kiln, chemical metallurgy kiln and limestone kiln by material handling difference.Cement kiln is mainly used in calcination of cement clinker, minute dry production cement kiln and the large class of wet production cement kiln two.Chemical metallurgy kiln is mainly used in the poor iron ore magnetic roasting of metallurgy industry Steel Plant; Chromium, josephinite oxidizing roasting; Refractory factory roasting high-aluminium vanadine Kuang He aluminium manufacturer roasting grog, aluminium hydroxide; The class mineral such as chemical plant roasting chrome ore and chromite ore fine.Limestone kiln, i.e. active lime kiln, the quickened lime of using for roasting Steel Plant, ferroalloy works and light dolomite.
Refractory castable is the principal item of unshape refractory, usings refractory castable use as the special shaped brick surrogate of boiler or oil production equipment in the World War II U.S. in period, and Japan began one's study and produces this type of material in nineteen fifty.Phase early 1950s, the Soviet Union starts applying silicon acid salt cement refractory castable.Since the sixties, rapidly, to the nineties, the unshape refractory output of the country such as Japan and the United States, moral has accounted for the more than 1/3 of refractory materials ultimate production for unshape refractory development, and refractory castable accounts for the 40%-50% of unshape refractory.China starts applying silicon acid salt cement refractory castable in phase early 1950s, be called at that time heat resistance concrete, be mainly used in 700 ℃ of following thermal technology's structures, 1965-1975 generally adopts aluminous cement and phosphoric acid salt refractory castable, be called at that time refractory concrete, use temperature is brought up to 1400-1600 ℃, built during this period products production base, at the beginning of 1976, set up product standard, after 1976, product category increases sharply, quality also progressively improves, the mid-80 China has developed again refractory castable of new generation, comprise low cement, ultra-low cement and non-cement refractory castable, its quality approaches international most advanced level.
At present, before rotary kiln, the liner at kilneye and kiln head cover position all adopts refractory castable conventionally, but is also considered to one of weakest link in whole kiln lining system simultaneously.The refractory materials at this position is often bearing the comprehensive destruction of high temperature, thermal shock, abrasion, mechanical stress and chemical erosion etc. simultaneously.For example, rotary kiln for large-scale dry-process cement rotary kiln and bauxitic clay and magnesia clinker burning, the mould material at its front kilneye position will be born huge thermal and mechanical stress and the Thermal-shock Damage that high temperature kiln body produces, and the destruction such as large-tonnage high-temperature rigid grog wearing and tearing, thereby easily ftracture, peel off and denude damage.Therefore, this just requires inner lining refractory except having enough refractoriness, also must have enough hot strengths, wear resistance and heat-shock resistance.Yet, performance for the refractory castable under this harsh working condition can't meet service requirements at present, its work-ing life is shorter, conventionally only have 3-8 month, meanwhile, most of revolution kiln refractory be take mullite as raw material at present, and it exists work-ing life not long, the defects such as maintenance frequency height, therefore how overcoming the deficiencies in the prior art is problems that current technical field of refractory materials is needed solution badly.
Summary of the invention
The object of the invention is in order to solve the deficiencies in the prior art, a kind of revolution kiln refractory and preparation method thereof is provided, the method is simple, the refractory materials making can extend the work-ing life of the resistance to material of rotary kiln, guarantee the normal production of enterprise, reduce to greatest extent the service work time simultaneously, reduce the cost of overhaul.
The technical solution used in the present invention is as follows:
A revolution kiln refractory, comprises the following component according to parts by weight meter: β-SiC 20-25 part, needle coke 8-15 part, porous periclasite-magnesium-aluminum spinel ceramic fine powder 60-70 part, silicon powder 2-5 part, float pearl 2-5 part, sapphire whisker 3-5 part, boron carbide powder 7-10 part, bonding agent 2-5 part.
Tackiness agent described in technical solution of the present invention is tar liquid or novolac resin liquid.
Further, preferably described revolution kiln refractory, comprises 23 parts of the following component according to parts by weight meter: β-SiC, 12 parts of needle cokes, 66 parts of porous periclasite-magnesium-aluminum spinel ceramic fine powders, 3 parts of silicon powders, floats 4 parts, pearl, 4 parts of sapphire whiskers, 9 parts of boron carbide powders, 3 parts of bonding agents.
The apparent porosity of the porous periclasite-magnesium-aluminum spinel ceramic fine powder described in technical solution of the present invention is 25 ~ 30%, and mean pore size is 1 ~ 25 μ m, Al
2o
3content is 6 ~ 10wt%, and thing phase composite is periclasite and magnesium-aluminium spinel, and particle diameter is 0.2 ~ 1mm.
The present invention also provides a kind of preparation method who turns round kiln refractory, comprises the steps:
Step (1), sapphire whisker and boron carbide powder are dispersed in bonding agent, then add β-SiC, needle coke, porous periclasite-magnesium-aluminum spinel ceramic fine powder, silicon powder and float pearl, after being stirred to and mixing, obtain compound;
Step (2), the compound that step (1) obtains is through sieving, and mesh size≤6mm, removes oversize; Minus mesh mechanical pressing, the base substrate after moulding is dry 16-20h at 100-200 ℃, at 1400-1480 ℃ of temperature, burns till, and soaking time is 4-7h, obtains turning round kiln refractory.
In preparation method's step (2) of above-mentioned revolution kiln refractory, dry mode is vacuum-drying.
compared with prior art, its beneficial effect is in the present invention:it is simple and reliable that the present invention turns round kiln refractory preparation method, the refractory materials making has advantages of that compressive strength is high, wear resistance good, thermal shock performance is good and anti-erosion medium resistance ability is strong, easy construction, greatly extended the work-ing life of the resistance to material of rotary kiln, guaranteed the normal production of enterprise, reduced to greatest extent the service work time simultaneously, reduce the cost of overhaul.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
A revolution kiln refractory, comprises 20 parts of the following component according to parts by weight meter: β-SiC, 8 parts of needle cokes, 60 parts of porous periclasite-magnesium-aluminum spinel ceramic fine powders, 2 parts of silicon powders, floats 2 parts, pearl, 3 parts of sapphire whiskers, 7 parts of boron carbide powders, 2 parts of tar liquids;
Wherein, the apparent porosity of described porous periclasite-magnesium-aluminum spinel ceramic fine powder is 25 ~ 30%, and mean pore size is 1 ~ 25 μ m, Al
2o
3content is 6 ~ 10wt%, and thing phase composite is periclasite and magnesium-aluminium spinel, and particle diameter is 0.2 ~ 1mm.
The preparation method of above-mentioned revolution kiln refractory, comprises the steps:
Step (1), sapphire whisker and boron carbide powder are dispersed in tar liquid, then add β-SiC, needle coke, porous periclasite-magnesium-aluminum spinel ceramic fine powder, silicon powder and float pearl, after being stirred to and mixing, obtain compound;
Step (2), the compound that step (1) obtains is through sieving, and mesh size≤6mm, removes oversize; Minus mesh mechanical pressing, the base substrate after moulding is vacuum-drying 20h at 100 ℃, at 1400 ℃ of temperature, burns till, and soaking time is 4h, obtains turning round kiln refractory.
Embodiment 2
A revolution kiln refractory, comprises 25 parts of the following component according to parts by weight meter: β-SiC, 15 parts of needle cokes, 70 parts of porous periclasite-magnesium-aluminum spinel ceramic fine powders, 5 parts of silicon powders, floats 5 parts, pearl, 5 parts of sapphire whiskers, 10 parts of boron carbide powders, 5 parts of novolac resin liquid;
Wherein, the apparent porosity of described porous periclasite-magnesium-aluminum spinel ceramic fine powder is 25 ~ 30%, and mean pore size is 1 ~ 25 μ m, Al
2o
3content is 6 ~ 10wt%, and thing phase composite is periclasite and magnesium-aluminium spinel, and particle diameter is 0.2 ~ 1mm.
The preparation method of above-mentioned revolution kiln refractory, comprises the steps:
Step (1), sapphire whisker and boron carbide powder are dispersed in novolac resin liquid, then add β-SiC, needle coke, porous periclasite-magnesium-aluminum spinel ceramic fine powder, silicon powder and float pearl, after being stirred to and mixing, obtain compound;
Step (2), the compound that step (1) obtains is through sieving, and mesh size≤6mm, removes oversize; Minus mesh mechanical pressing, the base substrate after moulding is vacuum-drying 16h at 200 ℃, at 1480 ℃ of temperature, burns till, and soaking time is 7h, obtains turning round kiln refractory.
Embodiment 3
A revolution kiln refractory, comprises 23 parts of the following component according to parts by weight meter: β-SiC, 12 parts of needle cokes, 66 parts of porous periclasite-magnesium-aluminum spinel ceramic fine powders, 3 parts of silicon powders, floats 4 parts, pearl, 4 parts of sapphire whiskers, 9 parts of boron carbide powders, 3 parts of tar liquids;
Wherein, the apparent porosity of described porous periclasite-magnesium-aluminum spinel ceramic fine powder is 25 ~ 30%, and mean pore size is 1 ~ 25 μ m, Al
2o
3content is 6 ~ 10wt%, and thing phase composite is periclasite and magnesium-aluminium spinel, and particle diameter is 0.2 ~ 1mm.
The preparation method of above-mentioned revolution kiln refractory, comprises the steps:
Step (1), sapphire whisker and boron carbide powder are dispersed in tar liquid, then add β-SiC, needle coke, porous periclasite-magnesium-aluminum spinel ceramic fine powder, silicon powder and float pearl, after being stirred to and mixing, obtain compound;
Step (2), the compound that step (1) obtains is through sieving, and mesh size≤6mm, removes oversize; Minus mesh mechanical pressing, the base substrate after moulding is vacuum-drying 18h at 150 ℃, at 1460 ℃ of temperature, burns till, and soaking time is 5.5h, obtains turning round kiln refractory.
Comparative example 1
Comparative example 1 is β-SiC to replace with SiC with the difference of embodiment 3.Be specially:
A revolution kiln refractory, comprises 23 parts of the following component according to parts by weight meter: SiC, 12 parts of needle cokes, 66 parts of porous periclasite-magnesium-aluminum spinel ceramic fine powders, 3 parts of silicon powders, floats 4 parts, pearl, 4 parts of sapphire whiskers, 9 parts of boron carbide powders, 3 parts of tar liquids;
Wherein, the apparent porosity of described porous periclasite-magnesium-aluminum spinel ceramic fine powder is 25 ~ 30%, and mean pore size is 1 ~ 25 μ m, Al
2o
3content is 6 ~ 10wt%, and thing phase composite is periclasite and magnesium-aluminium spinel, and particle diameter is 0.2 ~ 1mm.
The preparation method of above-mentioned revolution kiln refractory, comprises the steps:
Step (1), sapphire whisker and boron carbide powder are dispersed in tar liquid, then add SiC, needle coke, porous periclasite-magnesium-aluminum spinel ceramic fine powder, silicon powder and float pearl, after being stirred to and mixing, obtain compound;
Step (2), the compound that step (1) obtains is through sieving, and mesh size≤6mm, removes oversize; Minus mesh mechanical pressing, the base substrate after moulding is vacuum-drying 18h at 150 ℃, at 1460 ℃ of temperature, burns till, and soaking time is 5.5h, obtains turning round kiln refractory.
Comparative example 2
Comparative example 1 is not contain boron carbide powder with the difference of embodiment 3.Be specially:
A revolution kiln refractory, comprises 23 parts of the following component according to parts by weight meter: β-SiC, 12 parts of needle cokes, 66 parts of porous periclasite-magnesium-aluminum spinel ceramic fine powders, 3 parts of silicon powders, floats 4 parts, pearl, 4 parts of sapphire whiskers, 3 parts of tar liquids;
Wherein, the apparent porosity of described porous periclasite-magnesium-aluminum spinel ceramic fine powder is 25 ~ 30%, and mean pore size is 1 ~ 25 μ m, Al
2o
3content is 6 ~ 10wt%, and thing phase composite is periclasite and magnesium-aluminium spinel, and particle diameter is 0.2 ~ 1mm.
The preparation method of above-mentioned revolution kiln refractory, comprises the steps:
Step (1), is dispersed in sapphire whisker in tar liquid, then adds β-SiC, needle coke, porous periclasite-magnesium-aluminum spinel ceramic fine powder, silicon powder and floats pearl, after being stirred to and mixing, obtains compound;
Step (2), the compound that step (1) obtains is through sieving, and mesh size≤6mm, removes oversize; Minus mesh mechanical pressing, the base substrate after moulding is vacuum-drying 18h at 150 ℃, at 1460 ℃ of temperature, burns till, and soaking time is 5.5h, obtains turning round kiln refractory.
Comparative example 3
Comparative example 1 is not contain sapphire whisker with the difference of embodiment 3.Be specially:
A revolution kiln refractory, comprises 23 parts of the following component according to parts by weight meter: β-SiC, 12 parts of needle cokes, 66 parts of porous periclasite-magnesium-aluminum spinel ceramic fine powders, 3 parts of silicon powders, floats 4 parts, pearl, 9 parts of boron carbide powders, 3 parts of tar liquids;
Wherein, the apparent porosity of described porous periclasite-magnesium-aluminum spinel ceramic fine powder is 25 ~ 30%, and mean pore size is 1 ~ 25 μ m, Al
2o
3content is 6 ~ 10wt%, and thing phase composite is periclasite and magnesium-aluminium spinel, and particle diameter is 0.2 ~ 1mm.
The preparation method of above-mentioned revolution kiln refractory, comprises the steps:
Step (1), is dispersed in boron carbide powder in tar liquid, then adds β-SiC, needle coke, porous periclasite-magnesium-aluminum spinel ceramic fine powder, silicon powder and floats pearl, after being stirred to and mixing, obtains compound;
Step (2), the compound that step (1) obtains is through sieving, and mesh size≤6mm, removes oversize; Minus mesh mechanical pressing, the base substrate after moulding is vacuum-drying 18h at 150 ℃, at 1460 ℃ of temperature, burns till, and soaking time is 5.5h, obtains turning round kiln refractory.
The embodiment of the present invention 1 ~ 3 and comparative example 1 ~ 3 product performance detect as shown in table 1.
Table 1 product performance of the present invention detect data
As can be seen from the table, the effect in reference examples 1, reference examples 2 and reference examples 3 is inferior to embodiment; Embodiment 3 is optimum embodiment of the present invention.
Claims (6)
1. a revolution kiln refractory, is characterized in that comprising the following component according to parts by weight meter: β-SiC 20-25 part, needle coke 8-15 part, porous periclasite-magnesium-aluminum spinel ceramic fine powder 60-70 part, silicon powder 2-5 part, float pearl 2-5 part, sapphire whisker 3-5 part, boron carbide powder 7-10 part, bonding agent 2-5 part.
2. revolution kiln refractory according to claim 1, is characterized in that described tackiness agent is tar liquid or novolac resin liquid.
3. revolution kiln refractory according to claim 1, is characterized in that comprising 23 parts of the following component according to parts by weight meter: β-SiC, 12 parts of needle cokes, 66 parts of porous periclasite-magnesium-aluminum spinel ceramic fine powders, 3 parts of silicon powders, floats 4 parts, pearl, 4 parts of sapphire whiskers, 9 parts of boron carbide powders, 3 parts of bonding agents.
4. revolution kiln refractory according to claim 1, is characterized in that the apparent porosity of described porous periclasite-magnesium-aluminum spinel ceramic fine powder is 25 ~ 30%, and mean pore size is 1 ~ 25 μ m, Al
2o
3content is 6 ~ 10wt%, and thing phase composite is periclasite and magnesium-aluminium spinel, and particle diameter is 0.2 ~ 1mm.
5. the preparation method of revolution kiln refractory claimed in claim 1, is characterized in that comprising the steps:
Step (1), sapphire whisker and boron carbide powder are dispersed in bonding agent, then add β-SiC, needle coke, porous periclasite-magnesium-aluminum spinel ceramic fine powder, silicon powder and float pearl, after being stirred to and mixing, obtain compound;
Step (2), the compound that step (1) obtains sieves, and mesh size≤6mm, removes oversize; Minus mesh mechanical pressing, the base substrate after moulding is dry 16-20h at 100-200 ℃, at 1400-1480 ℃ of temperature, burns till, and soaking time is 4-7h, obtains turning round kiln refractory.
6. the preparation method of revolution kiln refractory according to claim 5, is characterized in that mode dry in step (2) is vacuum-drying.
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| CN201410375825.1A CN104140279B (en) | 2014-08-01 | A kind of revolution kiln refractory and preparation method thereof |
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| CN201410375825.1A CN104140279B (en) | 2014-08-01 | A kind of revolution kiln refractory and preparation method thereof |
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| CN104140279B CN104140279B (en) | 2017-01-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104446570A (en) * | 2014-12-17 | 2015-03-25 | 辽宁中镁控股股份有限公司 | Method for preparing low-carbon refractory brick from needle coke |
| CN111807820A (en) * | 2020-07-18 | 2020-10-23 | 山东鲁铭高温材料股份有限公司 | Preparation method of composite prefabricated part lining for high-temperature lime rotary kiln |
| CN112279637A (en) * | 2020-11-03 | 2021-01-29 | 江苏省陶瓷研究所有限公司 | Alumina fiber-magnesia-alumina spinel porous ceramic and preparation method thereof |
| CN112456999A (en) * | 2020-12-01 | 2021-03-09 | 中冶焦耐(大连)工程技术有限公司 | Brick for rotary kiln burning zone and preparation method thereof |
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| JPH1129363A (en) * | 1997-07-10 | 1999-02-02 | Toshiba Ceramics Co Ltd | Production of carbon-containing refractory, refractory for continuous casting and slide gate plate |
| CN101386544A (en) * | 2008-10-23 | 2009-03-18 | 武汉科技大学 | Periclase-spinelle-silicon carbide-carbon compound material and preparation method thereof |
| CN103864434A (en) * | 2014-02-21 | 2014-06-18 | 武汉科技大学 | Lightweight periclase-magnesium aluminate spinel refractory material for rotary cement kiln and preparation method thereof |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1129363A (en) * | 1997-07-10 | 1999-02-02 | Toshiba Ceramics Co Ltd | Production of carbon-containing refractory, refractory for continuous casting and slide gate plate |
| CN101386544A (en) * | 2008-10-23 | 2009-03-18 | 武汉科技大学 | Periclase-spinelle-silicon carbide-carbon compound material and preparation method thereof |
| CN103864434A (en) * | 2014-02-21 | 2014-06-18 | 武汉科技大学 | Lightweight periclase-magnesium aluminate spinel refractory material for rotary cement kiln and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104446570A (en) * | 2014-12-17 | 2015-03-25 | 辽宁中镁控股股份有限公司 | Method for preparing low-carbon refractory brick from needle coke |
| CN111807820A (en) * | 2020-07-18 | 2020-10-23 | 山东鲁铭高温材料股份有限公司 | Preparation method of composite prefabricated part lining for high-temperature lime rotary kiln |
| CN111807820B (en) * | 2020-07-18 | 2022-09-09 | 山东鲁铭新型材料股份有限公司 | Preparation method of composite prefabricated part lining for high-temperature lime rotary kiln |
| CN112279637A (en) * | 2020-11-03 | 2021-01-29 | 江苏省陶瓷研究所有限公司 | Alumina fiber-magnesia-alumina spinel porous ceramic and preparation method thereof |
| CN112456999A (en) * | 2020-12-01 | 2021-03-09 | 中冶焦耐(大连)工程技术有限公司 | Brick for rotary kiln burning zone and preparation method thereof |
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