Different Additives to Inhibit Magnesia (MgO) Hydration
| Periodical | Advanced Materials Research (Volumes 557 - 559) |
|---|---|
| Main Theme | Advanced Materials and Processes II |
| Edited by | Hongbing Ji, Yixin Chen and Shengzhou Chen |
| Pages | 3-7 |
| DOI | 10.4028/www.scientific.net/AMR.557-559.3 |
| Citation | Wen Zheng Zhang et al., 2012, Advanced Materials Research, 557-559, 3 |
| Online since | July, 2012 |
| Authors | Wen Zheng Zhang, Zheng Liu, Ping Li Mao |
| Keywords | Citric Acid (CA), Hydration, Magnesia |
| Price | US$ 28,- |
Magnesia (MgO) is a fundamental component of many minerals found in nature and is used widely in our life, especially in refractory industry. However, the antihydration of MgO is a key concern in refractory suspension processing, MgO additions only in form of coarse particles(≥ 50 μm) or its contents of up to 10 wt.% are as a result of their high possibility to take place hydration reaction in water and the reaction can lead to volumetric expansion obviously. In the present work, citric acid (CA) can complex with Mg2+ in the MgO suspension under the condition of 4h and 25℃, and the deposit of magnesium ion-CA complexes become protective coating to inhibit magnesia react with water to form Mg(OH)2.The test results of RSV of different additives shows CA is the best antihydration compound to inhibit MgO hydration comparing with EDTA-2Na，sodium pyrophosphate(SP)，trimeric sodium phosphate(TSP), which RSV is only 5.3ml when its dosage is 0.3%wt.
