CN1209320C - High-strength wear-resistant cast material of compact electrically molten corundum - Google Patents
High-strength wear-resistant cast material of compact electrically molten corundum Download PDFInfo
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- CN1209320C CN1209320C CN 01123439 CN01123439A CN1209320C CN 1209320 C CN1209320 C CN 1209320C CN 01123439 CN01123439 CN 01123439 CN 01123439 A CN01123439 A CN 01123439A CN 1209320 C CN1209320 C CN 1209320C
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Abstract
The present invention provides a compact high strength casting material with the function of super abrasion resistance. The casting material has excellent abrasion resistance, erosion resistance, scouring resistance and heat shock stability, and the casting material can be used as an inner lining material of burning chambers of circulating fluidized bed boilers and high temperature cyclone separators. The running period of circulating fluidized bed boilers and cyclone separators is prolonged, the problem that boiler inner linings need to be frequently repaired and replaced is overcome, the manpower and the material resources are saved, and the production efficiency is greatly improved.
Description
Technical field
The present invention relates to refractory materials, more particularly the present invention relates to the mould material used in the circular fluid bed of fuel-burning power plant, and described mould material in above-mentioned fluidized-bed combustion boiler combustion chamber and high temperature cyclone separator as the purposes of inner lining refractory.
Background technology
China's thermal power generating equipment accounts for more than 3/4 of generating total installed capacity amount according to statistics, the excessive situation of thermoelectricity proportion will continue a suitable period, therefore accelerate development the efficient height, the low-contamination type fired power generating unit, accelerating exploitation clean coal combustion technology is the direction of China's thermoelectricity technical development.
The circular fluid bed technology is the clean coal combustion technology of generally acknowledging at present, because circulating fluidized bed electricity generation boiler construction system complexity is great in constructing amount, and coal dust flow velocity height in the system pipeline, flow is big, therefore requires the refractory materials of excellent performance.But the refractory materials that uses in circular fluid bed at present is owing to adopt high alumina or fused corundom, and cement content is high, its wear resistance, resistance to fouling, abrasion resistance and thermal shock resistance all can not satisfy the requirement of circular fluid bed technology, and its life cycle is short, need often to repair or change, influence the normal operation of circular fluid bed, consume a large amount of manpower and financial resources.
Summary of the invention
In order to overcome the defective of above-mentioned mould material, the inventor has reasonably selected mould material each component and proportioning thereof through studying intensively, and adopts fine and close fused corundom (low porosity fused corundom), super-fine powder and low cement etc., thus finished the present invention.
The purpose of this invention is to provide a kind of wear resistance, resistance to fouling, the novel mould material of abrasion resistance and thermal shock resistance excellence, it is the super wear-resistant castable of compact high-strength degree, this material is except that above-mentioned advantage, and it is the intensity height under middle gentle high temperature, and has good construction performance.
Another object of the present invention provides the purposes of described high-strength wear-resistant cast material of compact electrically molten corundum as inner lining refractory in burning in circulating fluid bed boiler chamber and the high temperature cyclone separator.
High-strength wear-resistant cast material of compact electrically molten corundum of the present invention is formed (wherein the weight % of each component is 100 weight % in the mould material gross weight) by A and B two portions:
A. part is the uniform mixture of following each component:
1, aggregate: fine and close fused corundom (being called the low porosity fused corundom again), wherein granularity 10-5mm person accounts for 20-25 weight %, and granularity 5-3mm person accounts for 10-20 weight %, and granularity 3-1mm person accounts for 10-15 weight %, and granularity 1-0mm person accounts for 20-25 weight %;
2, powder: granularity accounts for 13-15 weight % less than the fine and close fused corundom fine powder of 0.088mm, and wherein granularity accounts for more than the 80 weight % of fine powder total amount less than 0.044mm person;
3, agglutinant: wilkinite accounts for 2-3 weight %,
4, super-fine powder: silicon ash (silica dust) accounts for 3-5 weight %,
5, water reducer (dispersion agent): tripoly phosphate sodium STPP (Na
3P
3O
10) account for 0.15-0.3 weight %;
6, detonation suppressor (air entrapment agent): metallic aluminium powder 0.2-0.3 weight %;
B partly is a wedding agent high-alumina cement 625
#, account for the 3-5 weight % of mould material gross weight;
Its condition be each component weight % be combined into 100%.
A preferred embodiment of the present invention is: the super wear-resistant castable of compact high-strength degree is formed (wherein the weight % of each component is 100 weight % in the mould material gross weight) by A and B two portions:
A. part is the uniform mixture of following each component:
1, aggregate: fine and close fused corundom, wherein granularity 10-5mm person accounts for 22 weight %, and granularity 5-3mm person accounts for 16 weight %, and granularity 3-1mm person accounts for 13 weight %, and granularity 1-0 person accounts for 22 weight %;
2, powder: granularity accounts for 14 weight % less than the fine and close fused corundom fine powder of 0.088mm, and wherein granularity accounts for more than the 80 weight % of fine powder total amount less than 0.044mm person;
3, agglutinant: wilkinite accounts for 2.5 weight %,
4, super-fine powder: the silicon ash accounts for 5 weight %,
5, water reducer (dispersion agent): tripoly phosphate sodium STPP (Na
3P
3O
10) 0.2 weight %;
6, detonation suppressor (air entrapment agent): metallic aluminium powder 0.3 weight %;
B. part is a wedding agent high-alumina cement 625
#, account for 5 weight % of mould material gross weight.
Select fine and close fused corundom as bone meal, powder be because its apparent porosity less than 4%, volume density is greater than 3.88g/cm
3, Mohs' hardness is higher than 9.Select high-alumina cement to be because strong with the avidity of synthetic material, the effect that adds super-fine powder is to have strengthened fillibility, has improved application property, thereby makes its mobile increase, and volume density improves, and shows porosity and reduces, and intensity significantly improves.
The each component that uses in the mould material of the present invention is to well known to a person skilled in the art product, all can buy on market.
The preparation method of product of the present invention is simple, and A each component partly according to described weight ratio uniform mixing, is packed A and B respectively again.
The using method of product of the present invention is the A of mould material part and B partly to be joined in forced mixer or the mortar mixer according to described weight ratio stir (stirrer will clean up in advance), the cleaning tap water of the back adding mould material that stirs total amount 6-8 weight %, stir evenly, adopt casting or streak method in 30 minutes, they to be lining in the required position of burning in circulating fluid bed boiler district and cyclonic separator then, ambient cure demoulding after 24 hours, speed with 25 ℃/h is warmed up to 110 ℃, kept 4 hours, speed with 40 ℃/h is warmed up to 400 ℃, kept 4 hours, speed with 100 ℃/h is warmed up to use temperature, promptly can be made into the lining of circular fluid bed and cyclonic separator.
Table 1 has compared the performance of mould material of the present invention and the present mould material of using.
Table 1 mould material of the present invention and the comparison of the performance of the mould material of use at present
| Project | Product of the present invention | The white fused alumina wear-resistant castable | The high alumina wear-resistant castable |
| Al 2O 3％ | 92 | 89 | 68 |
| SiO 2％ | 4 | 1 | 1.2 |
| Fe 2O 3％ | ＜0.5 | ＜0.5 | ＜1.5 |
| Volume density g/cm 3 | 3.23 | 3.1 | 2.35 |
| After 110 ℃ of bakings of compressive strength after (MPd) 1100 ℃ of bakings | 120 130 | 90 100 | 70 80 |
| After 110 ℃ of bakings of folding strength after (MPd) 1100 ℃ of bakings | 12 14 | 7 9 | 7 8 |
| 1450 ℃ of 2h of reheating linear change rate on reheating % | 0.1 | 0.1 | 0.6 |
| Abrasion loss (cm 3) | 5.5 | 6.5 | 8 |
Product of the present invention has higher compressive strength, and the hardness of aggregate and 50% matrix is bigger, and its Mohs' hardness is higher than 3 hours abrasion losies of 9,1450 ℃ of sintering and is lower than 5.5/cm
3, the density height has excellent abrasive, resistance to fouling, abrasion resistance and thermal shock resistance.Under identical working conditions, the mould material of using with present this area compares, brought up to accumulation operation 20 running period of circular fluid bed from about 5000-6000 hour, more than 000 hour, overcome the boiler liner and needed often to repair the problem of changing, save manpower and materials, improved production efficiency greatly.
Embodiment
With fine and close fused corundom 730Kg (granularity 10-5mm220Kg wherein, granularity 15-3mm160Kg, granularity 3-1mm130Kg, granularity 1-0mm220Kg), granularity is less than the fine and close fused corundom fine powder 140Kg (wherein granularity accounts for more than the 80 weight % of fine powder total amount less than 0.044mm person) of 0.088mm, wilkinite 25Kg, silicon ash 50Kg, tripoly phosphate sodium STPP (Na
3P
3O
10) 2Kg and metallic aluminium powder 3Kg join in the forced mixer and stir (stirrer will clean up in advance), the back that stirs adds 50Kg high-alumina cement 625
#Stir, add the cleaning tap water of 60Kg again, stir evenly, adopt casting or streak method in 30 minutes, they to be lining in the required position of burning in circulating fluid bed boiler district and cyclonic separator then, ambient cure demoulding after 24 hours is warmed up to 110 ℃ with the speed of 25 ℃/h, keeps 4 hours, speed with 40 ℃/h is warmed up to 400 ℃, kept 4 hours, and be warmed up to use temperature, promptly can be made into the lining of circular fluid bed and cyclonic separator with the speed of 100 ℃/h.
In sum, the invention provides the super wear-resistant castable of a kind of compact high-strength degree, this mould material has excellent abrasive, resistance to fouling, abrasion resistance and thermal shock resistance can be used as the inner lining material in fluidized-bed combustion boiler combustion chamber and the high temperature cyclone separator, improved the running period of circular fluid bed and cyclonic separator, having overcome the boiler liner needs often to repair the problem of changing, and has saved manpower and materials, has improved production efficiency greatly.
Claims (3)
1, high-strength wear-resistant cast material of compact electrically molten corundum is made up of A and B two portions, and wherein the weight % of each component is 100 weight % in the mould material gross weight:
A. part is the uniform mixture of following each component:
Fine and close fused corundom, wherein granularity 10-5mm person accounts for 20-25 weight %, and granularity 5-3mm person accounts for 10-20 weight %, and granularity 3-1mm person accounts for 10-15 weight %, and granularity 1-0mm person accounts for 20-25 weight %;
Granularity accounts for 13-15 weight % less than the fine and close fused corundom fine powder of 0.088mm, and wherein granularity accounts for more than the 80 weight % of fine powder total amount less than 0.044mm person;
Wilkinite accounts for 2-3 weight %,
The silicon ash accounts for 3-5 weight %,
Tripoly phosphate sodium STPP (Na
3P
3O
10) account for 0.15-0.3 weight %;
Metallic aluminium powder 0.2-0.3 weight %;
B. part is a high-alumina cement 625
#, account for the 3-5 weight % of mould material gross weight;
Its condition is that each component weight % sum is 100%.
2, according to the high-strength wear-resistant cast material of compact electrically molten corundum of claim 1, form by A and B two portions,
A. part is the uniform mixture of following each component:
Fine and close fused corundom, wherein granularity 10-5mm person accounts for 22 weight %, and granularity 5-3mm person accounts for 16 weight %, and granularity 3-1mm person accounts for 13 weight %, and granularity 1-0mm person accounts for 22 weight %;
Granularity accounts for 14 weight % less than the fine and close fused corundom fine powder of 0.088mm, and wherein granularity accounts for more than the 80 weight % of fine powder total amount less than 0.044mm person;
Wilkinite accounts for 2.5 weight %,
The silicon ash accounts for 5 weight %,
Tripoly phosphate sodium STPP (Na
3P
3O
10) account for 0.2 weight %;
Metallic aluminium powder 0.3 weight %;
B. part is a wedding agent high-alumina cement 625
#, account for 5 weight % of mould material gross weight;
The weight % of each component is 100 weight % in the mould material gross weight.
3, the high-strength wear-resistant cast material of compact electrically molten corundum of claim 1 in burning in circulating fluid bed boiler chamber and high temperature cyclone separator as the purposes of inner lining refractory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01123439 CN1209320C (en) | 2001-07-24 | 2001-07-24 | High-strength wear-resistant cast material of compact electrically molten corundum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01123439 CN1209320C (en) | 2001-07-24 | 2001-07-24 | High-strength wear-resistant cast material of compact electrically molten corundum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1398823A CN1398823A (en) | 2003-02-26 |
| CN1209320C true CN1209320C (en) | 2005-07-06 |
Family
ID=4665056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01123439 Expired - Fee Related CN1209320C (en) | 2001-07-24 | 2001-07-24 | High-strength wear-resistant cast material of compact electrically molten corundum |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303036C (en) * | 2004-09-15 | 2007-03-07 | 郑州大学 | Process for preparing high strength corundum refractory material by low temperature sintering |
| CN101475385B (en) * | 2009-01-13 | 2011-07-27 | 宜兴市中韩窑业工程有限公司 | Impervious anticorrosion pouring material |
| CN101709342B (en) * | 2009-12-03 | 2012-09-05 | 长兴云峰炉料有限公司 | Oxygen lance for blast furnaces |
| CN101792305B (en) * | 2010-02-09 | 2012-08-08 | 赵宁 | Ultrastrong wear resistant corundum-boron carbide liner composite material |
| CN102701752A (en) * | 2012-01-10 | 2012-10-03 | 河南安瑞高温材料股份有限公司 | High-heat-conductive refractory material for carbon roasting fire wall and preparation method of high-heat-conductive refractory material |
| CN107556004B (en) * | 2017-07-12 | 2020-07-03 | 宜兴瑞泰耐火材料工程有限公司 | Ceramic wear-resistant repair material for CFB boiler |
-
2001
- 2001-07-24 CN CN 01123439 patent/CN1209320C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1398823A (en) | 2003-02-26 |
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