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Mechanism of boron oxide as a phase regulator for modification of manganese slag |
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| Authors: | Ping Chen Zhibo Li Rongjin Liu Weiheng Xiang Aixiang Qi |
| Affiliation: | 1. College of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, China 2. Key Lab of New Processing Technology for Nonferrous Metals & Materials, Minstry of Education, Guilin, 541004, China 3. Guang Xi Key Laboratory of New Energy and Building Energy Saving, Guilin, 541004, China 4. University of Science and Technology Beijing, Beijing, 100083, China |
| Abstract: | The current research focused on adjusting the low hydration activity of the metallurgical slag by phase reconstruction technique. Boron oxide was used as a phase regulator to improve the amorphous phase composition of the manganese slag, consequently enhancing its hydraulic activity. The effects of boron oxide dosage and calcination temperature on the manganese slag amorphous phase content were investigated. XRD and DTG were performed to analyze the hydration mechanism of the manganese slag powder and cement. Results show that, when boron oxide dosage is 15%, calcination temperature is 1 300 °C, and holding time for 1 hour, the amorphous content of the modified manganese slag reaches 95% and its 28-day activity index reaches 81.7%. The manganese slag powder can then be used as cement or concrete admixtures for the building materials industry. |
| Keywords: | boron oxide manganese slag amorphous content hydraulic activity |
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