High Purity Corundum Castable Used for Circulating Fluidized Bed Boiler
The Description:
The circulating fluidized bed power generation boiler body is very complicated, the construction volume is large, the flow rate of pulverized coal in the system pipeline is high, the flow rate is large, and the refractory material used in the lining is required to be high strength, good wear resistance, and has excellent constructability. Steel fiber reinforced castable is a heat-resistant steel fiber in the material, high castable strength, good thermal shock resistance, stable volume, small thermal conductivity, strong resistance to slag penetration and erosion, erosion resistance, convenient construction, furnace structure integrity and other characteristics, is currently commonly used in fluidized bed boiler anti-wear amorphous materials, compared with traditional castable can greatly improve the boiler running time. The material is mainly used for high temperature wear-resistant parts of circulating fluidized bed boilers.
The Physical and Chemical Technial Index of High Purity Castable Used for Circulating Fluidized Bed Boiler
| Item |
NGJ-16 |
NGJ-15 |
NGJ-145 |
NGJ-145 |
NGJ-135 |
| Service temperature ºC |
1600 |
1500 |
1450 |
1450 |
1350 |
| Al2O3 % ≥ |
90 |
80 |
75 |
40 |
65 |
| SIC % ≥ |
-- |
-- |
-- |
45 |
-- |
| BD g/cm3 110ºC*24h ≥ |
3.1 |
3 |
2.7 |
2.6 |
2.4 |
| MOR Mpa ≥ |
110ºC*24h |
11 |
10 |
7 |
9 |
6 |
| ºC*3h |
1600/13 |
1500/12 |
1450/8 |
1450/12 |
1350/7 |
| CCS Mpa ≥ |
110ºC*24h |
80 |
70 |
60 |
65 |
55 |
| ºC*3h |
1600/95 |
1500/90 |
1450/80 |
1450/90 |
1350/65 |
| PLC% ºC*3h |
1600-0.5 |
1500-0.5 |
1450-0.5 |
1450-0.58 |
1350-0.5 |
| Thermal conductivity W/m.k |
1.3 |
1.3 |
1.2 |
1.2 |
1.1 |
The Feature:
1. Refractoriness: The refractoriness of refractory castable should be higher than the maximum working temperature of the boiler to ensure that it will not soften or melt under high temperature environment.
2. Thermal stability: refractory castable should have good thermal stability and be able to withstand temperature changes during boiler start-up and shutdown to avoid thermal shock cracks.
3. Wear resistance: refractory castable should have high wear resistance and be able to withstand the material erosion of high-speed movement in the furnace.
4. Erosion resistance: refractory castable should have good erosion resistance and can prevent the erosion and wear of the material on the inner wall of the furnace.
In short, the selection of refractory castables for CFB boilers should be determined according to the working characteristics, use environment and needs of boilers. By selecting suitable refractory castable, the long-term stable operation of the boiler can be ensured, and the service life and economic benefits of the equipment can be improved. At the same time, in the process of use, it is also necessary to strengthen maintenance and overhaul work, timely detection and treatment of damage and wear problems of refractory castables, to ensure the safe operation of the boiler.
Why choose us?
Zhengzhou Kaiyuan Refractories Co., Ltd is a manufacturer of silicon-aluminum refractory (fireclay brick, high alumina brick, silica brick, mullite brick, corundum brick, insulation brick, castable, mortar) for coke oven, blast furnace, hot blast stove, heating furnace, anode baking furnace, boilers and other industrial furnaces for 20 years located in Henan, China.
Our total annual production capacity is about 100,000 tons of dense-shaped refractory product, and 100,000 tons of monolithic refractory product.
We have three tunnel kilns for silicon-aluminum dense bricks and one new plant for the monolithic refractory.
We're sure our custom-made products and professional services will bring you a stable quality supply and more profit.
Our Laboratory and R&D Center
We have test equipment for the following items:
chemical %
bulk density
apparent porosity
cold crushing strength
modulus of rupture
refractoriness under load
creep
thermal expansion
Reheat linear change
thermal shock resistance
thermal conductivity
Contract Kiln Construction
Certificates
FAQ
1. Are you a Manufacturer or trader?
A: We are manufacturer and our plant is located in Xinmi city, Henan, China
2. Can we visit your company?
A: You are warmly welcome to visit our company at anytime, you'll not regret of the visiting.
3. Do you accept OEM?
A: Yes, we do OEM.
4. What's the MOQ of trial order?
A: We care about all the potential customers and take all the trails orders.
5. What is the payment term?
A: TT, LC, DP, DA.
6. How long is the delivery time?
A: Usually within 35 days after down payment.
7. Do you accept third party inspection ?
A: Yes for sure, we accept the third party inspection before delivery.
8. What is your after-sell service?
A: The rejected goods can be replaced or we can make compensation for it. We can send technical engineers to the end user for technical issue.
9.What is your company's certification?
A: ISO9001 certificate
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