Zirconium corundum product introduction
Zirconium corundum is smelted from alumina and zirconia in an electric arc furnace at a high temperature above 2000°C. Zirconium corundum has tough texture, dense structure, high strength, good thermal stability, and is generally taupe. The main mineral phase of zirconium corundum is the eutectic formed by a-Al2O3 and Al2O3-ZrO2, the secondary crystal phase is baddeleyite, and there is also a small amount of glass phase. According to the content of ZrO2, generally 25 zirconium corundum (ZrO2 25%) and 40 zirconium corundum (ZrO2 40%).
Zirconium corundum index
| crystal form | monoclinic, tetragonal |
| Crystal size | ≤30μm |
| chemical properties | both sexes |
| React with acid and base | unresponsive |
| react with carbon | Carbide formation begins at 1650 °C (when in contact with carbon) |
| true density | 4.20g/cm3 |
| Bulk density | 2.18g/cm3 |
| Moh’s hardness | 9.0 |
| Knoop hardness | 1450-2000kg/cm2 |
| color | Gray, also gray after calcination |
| melting point | 1850℃ |
| Operating temperature | 1600℃ |
The difference between 25 content zirconium corundum and 40 content zirconium corundum
1. The hardness of 40 content zirconium corundum is lower than 25 content, the higher the alumina content is , the higher the hardness is Corundum for heavy duty grinding
| product | Al2O3% | ZrO2% | TiO2% | Fe2O3% | SiO2% |
| ZA25 | 70min | 24-30 | 1.5max | 0.5max | 1.0max |
| ZA40 | 57min | 35-44 | 1.5max | 0.5max | 1.0max |
Zirconia corundum use
Zirconium corundum is widely used in the production and manufacture of refractory materials such as continuous rolling and continuous casting, nozzles, runners, and glass furnaces in the iron and steel industry. Zirconium corundum has good resistance to melt erosion. As a high-grade abrasive, it can manufacture high-performance heavy-duty grinding wheels. It has a good grinding effect on steel parts, cast iron parts, heat-resistant steel, and various alloy materials.
In addition, zirconium corundum is also a high-grade refractory raw material, which is an ideal material for making high-performance sliding nozzles and submerged nozzles, and can also be used to make zirconium corundum bricks for glass melting furnaces.
about service
1. Manufacturer’s supply guarantee
Our company has been adhering to the principle of “quality first, honesty first” since its establishment in 1999, with stable quality and competitive price.
2. About the invoice
13% value-added tax special invoices, the billing amount is 5,000 yuan, and the cumulative billing amount is less than 5,000 yuan.
Invoices will be billed on the 20th of each month, and will be sent by express within 3 days.
3. About delivery
domestic:
Express: SF Yuantong Tiantian Zhongtong Shentong Yunda EMS, etc.
Logistics: Aneng Debon Tiandi Huayu Jiaji, etc.
Large cargo: distribution truck special line complete vehicle, etc.
internationality:
Arrange sea transportation, the specific time depends on the distance
4. About the payment method
Payment terms: 100% payment upon delivery
payment method:
Domestic: bank transfer (ICBC, ABC, CCB, BOCOM), Alipay, WeChat transfer, etc.
International: T/T, L/C, west union
5, about samples
1Samples within kg are free of charge, courier fee on delivery; A certain sample fee will be charged for more than 1 kg.
6, about shipping
Delivery within 2 days of receiving payment; If there is any quality problem during receipt or use, it can be returned and exchanged free of charge.
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