Refractory cement NA-70
Performance: with high content of CA mineral, high specific surface area ,high strength,high early strength.
| Items |
CA-65P |
NA-70 |
| Refractoriness ºC |
1610-1650 |
1650-1690 |
| Chemical composition % |
|
|
| Al2O3 |
65 |
68-70.5 |
| CaO max |
35 |
28.5-30.5 |
| SiO2 max |
1.0 |
0.2-0.6 |
| Fe2O3 max |
0.5 |
0.4 |
| Na2O+K2O max |
0.4 |
0.4 |
| S max |
0.1 |
0.1 |
| Specific density g/cm3 |
3.05-3.15 |
2.95-3.05 |
| Specific surface area m2/kg min |
550 |
400 |
| Mortar performance |
|
|
| Initial setting time minutes min |
30 |
90 |
| Final setting time minutes max |
360 |
300 |
| Rupture strength Mpa |
|
|
| 24 hr |
5.5 |
7.0 |
| 72 hr |
6.0 |
9.0 |
| Cold crushing strength Mpa |
|
|
| 24 hr |
40 |
50 |
| 72 hr |
50 |
60 |
| Castable performance |
|
|
| Water addition % |
6.8 |
5.2 |
| Flow value mm |
|
|
| Initial flow value |
161 |
194 |
| 30 minutes |
168 |
190 |
| 60 minutes |
167 |
173 |
| Cold crushing strength Mpa |
|
|
| 24 hr room temperature |
24 |
21 |
| 110ºC dry 24hr |
119 |
92 |
| 1100ºC heating 6 hr |
112 |
47 |
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
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
Audited Supplier 
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