Improved hydration resistance of MgO–2CaO·SiO2–3CaO·SiO2 composite refractory using low-grade minerals
Three low-grade mineral raw materials, i.e., natural dolomite, high-silicon magnesite, and forsterite tailings were used to prepare a MgO–2CaO·SiO _2 –3CaO·SiO _2 composite refractory, and its hydration resistance was essentially improved. Free CaO was converted into more stable calcium silicate whi...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2020-01-01
|
| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/abad52 |
| _version_ | 1797746169376407552 |
|---|---|
| author | Xuewu Zhan Xiaopeng Wu Yiqiang Xing Xinghui Cui Shijie Wang Fei Zhao Wei Meng Chengliang Ma Xiangchong Zhong |
| author_facet | Xuewu Zhan Xiaopeng Wu Yiqiang Xing Xinghui Cui Shijie Wang Fei Zhao Wei Meng Chengliang Ma Xiangchong Zhong |
| author_sort | Xuewu Zhan |
| collection | DOAJ |
| description | Three low-grade mineral raw materials, i.e., natural dolomite, high-silicon magnesite, and forsterite tailings were used to prepare a MgO–2CaO·SiO _2 –3CaO·SiO _2 composite refractory, and its hydration resistance was essentially improved. Free CaO was converted into more stable calcium silicate which protected MgO from hydration, and low melting phases formed by impurities promoted densification. The composite refractory, predominantly composed of MgO, β -2CaO·SiO _2 , and 3CaO·SiO _2 with a bulk density of 3.13 g cm ^−3 and apparent porosity of 4.6%, was obtained after being calcined at 1600 °C for 3 h. The prepared composite exhibited excellent hydration resistance with a weight increase of only 0.03% at 1600 °C. Microstructural analysis revealed that a dense matrix consisting of intergranular calcium–silicate phases, was dispersed by rounded MgO aggregates. |
| first_indexed | 2024-03-12T15:34:07Z |
| format | Article |
| id | doaj.art-240187e0334e4a9587aaeda1442de927 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:34:07Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-240187e0334e4a9587aaeda1442de9272023-08-09T16:18:45ZengIOP PublishingMaterials Research Express2053-15912020-01-017808550210.1088/2053-1591/abad52Improved hydration resistance of MgO–2CaO·SiO2–3CaO·SiO2 composite refractory using low-grade mineralsXuewu Zhan0https://orcid.org/0000-0002-8109-4074Xiaopeng Wu1Yiqiang Xing2Xinghui Cui3Shijie Wang4Fei Zhao5Wei Meng6Chengliang Ma7Xiangchong Zhong8Henan Key Laboratory of High Temperature Functional Ceramics, School of Material Science and Engineering, Zhengzhou University , 75 Daxue Road, Zhengzhou 450052, People’s Republic of ChinaHenan Key Laboratory of High Temperature Functional Ceramics, School of Material Science and Engineering, Zhengzhou University , 75 Daxue Road, Zhengzhou 450052, People’s Republic of ChinaHenan Key Laboratory of High Temperature Functional Ceramics, School of Material Science and Engineering, Zhengzhou University , 75 Daxue Road, Zhengzhou 450052, People’s Republic of ChinaHenan Key Laboratory of High Temperature Functional Ceramics, School of Material Science and Engineering, Zhengzhou University , 75 Daxue Road, Zhengzhou 450052, People’s Republic of ChinaHenan Key Laboratory of High Temperature Functional Ceramics, School of Material Science and Engineering, Zhengzhou University , 75 Daxue Road, Zhengzhou 450052, People’s Republic of ChinaHenan Key Laboratory of High Temperature Functional Ceramics, School of Material Science and Engineering, Zhengzhou University , 75 Daxue Road, Zhengzhou 450052, People’s Republic of ChinaHenan Key Laboratory of High Temperature Functional Ceramics, School of Material Science and Engineering, Zhengzhou University , 75 Daxue Road, Zhengzhou 450052, People’s Republic of ChinaHenan Key Laboratory of High Temperature Functional Ceramics, School of Material Science and Engineering, Zhengzhou University , 75 Daxue Road, Zhengzhou 450052, People’s Republic of ChinaHenan Key Laboratory of High Temperature Functional Ceramics, School of Material Science and Engineering, Zhengzhou University , 75 Daxue Road, Zhengzhou 450052, People’s Republic of ChinaThree low-grade mineral raw materials, i.e., natural dolomite, high-silicon magnesite, and forsterite tailings were used to prepare a MgO–2CaO·SiO _2 –3CaO·SiO _2 composite refractory, and its hydration resistance was essentially improved. Free CaO was converted into more stable calcium silicate which protected MgO from hydration, and low melting phases formed by impurities promoted densification. The composite refractory, predominantly composed of MgO, β -2CaO·SiO _2 , and 3CaO·SiO _2 with a bulk density of 3.13 g cm ^−3 and apparent porosity of 4.6%, was obtained after being calcined at 1600 °C for 3 h. The prepared composite exhibited excellent hydration resistance with a weight increase of only 0.03% at 1600 °C. Microstructural analysis revealed that a dense matrix consisting of intergranular calcium–silicate phases, was dispersed by rounded MgO aggregates.https://doi.org/10.1088/2053-1591/abad52low-grade mineralscalcium-silicatecomposite refractorieshydration resistance |
| spellingShingle | Xuewu Zhan Xiaopeng Wu Yiqiang Xing Xinghui Cui Shijie Wang Fei Zhao Wei Meng Chengliang Ma Xiangchong Zhong Improved hydration resistance of MgO–2CaO·SiO2–3CaO·SiO2 composite refractory using low-grade minerals Materials Research Express low-grade minerals calcium-silicate composite refractories hydration resistance |
| title | Improved hydration resistance of MgO–2CaO·SiO2–3CaO·SiO2 composite refractory using low-grade minerals |
| title_full | Improved hydration resistance of MgO–2CaO·SiO2–3CaO·SiO2 composite refractory using low-grade minerals |
| title_fullStr | Improved hydration resistance of MgO–2CaO·SiO2–3CaO·SiO2 composite refractory using low-grade minerals |
| title_full_unstemmed | Improved hydration resistance of MgO–2CaO·SiO2–3CaO·SiO2 composite refractory using low-grade minerals |
| title_short | Improved hydration resistance of MgO–2CaO·SiO2–3CaO·SiO2 composite refractory using low-grade minerals |
| title_sort | improved hydration resistance of mgo 2cao·sio2 3cao·sio2 composite refractory using low grade minerals |
| topic | low-grade minerals calcium-silicate composite refractories hydration resistance |
| url | https://doi.org/10.1088/2053-1591/abad52 |
| work_keys_str_mv | AT xuewuzhan improvedhydrationresistanceofmgo2caosio23caosio2compositerefractoryusinglowgrademinerals AT xiaopengwu improvedhydrationresistanceofmgo2caosio23caosio2compositerefractoryusinglowgrademinerals AT yiqiangxing improvedhydrationresistanceofmgo2caosio23caosio2compositerefractoryusinglowgrademinerals AT xinghuicui improvedhydrationresistanceofmgo2caosio23caosio2compositerefractoryusinglowgrademinerals AT shijiewang improvedhydrationresistanceofmgo2caosio23caosio2compositerefractoryusinglowgrademinerals AT feizhao improvedhydrationresistanceofmgo2caosio23caosio2compositerefractoryusinglowgrademinerals AT weimeng improvedhydrationresistanceofmgo2caosio23caosio2compositerefractoryusinglowgrademinerals AT chengliangma improvedhydrationresistanceofmgo2caosio23caosio2compositerefractoryusinglowgrademinerals AT xiangchongzhong improvedhydrationresistanceofmgo2caosio23caosio2compositerefractoryusinglowgrademinerals |