Back to Search
Start Over
Study on magnesium slag desulfurizer modified by additives in quenching hydration
- Source :
- Journal of Material Cycles and Waste Management. 21:1211-1223
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
Abstract
- The desulfurization performance of magnesium slag has been improved by the modified method of quenching hydration, but it still cannot meet the industrial requirements. Based on the research of additives for calcium-based desulfurizer, NaCl, CaCl2, Na2SO4, CaSO4, Na2CO3, K2CO3, acetic acid and adipic acid are used for modification of quenching hydrated magnesium slag. TGA are used for analysis of magnesium slag desulfurization performance; XRD, SEM, EDS and BET are used for analysis of modified magnesium slag composition, surface morphology and microscopic characteristics, respectively, obtaining the modification mechanism of different additives on the quenching hydrated magnesium slag. The results showed that: the best desulfurizer was 2% Na2SO4 modified magnesium slag, and the calcium conversion rate reached 40.16%. Cl− and SO42− mainly improve the desulfurization performance of magnesium slag by improving the specific surface area and pore volume of magnesium slag, and the modification effect of SO42− was better than Cl−. CO32− mainly through the reaction with Ca(OH)2 to produce CaCO3 that could crystalize on the surface of magnesium slag, thus improving the desulfurization performance of magnesium slag. Organic acids enhanced the transmission of H+ in hydrated slurry and promoted the dissolution of Ca2SiO4.
- Subjects :
- Quenching
Adipic acid
Materials science
Magnesium
0211 other engineering and technologies
Slag
chemistry.chemical_element
02 engineering and technology
010501 environmental sciences
01 natural sciences
Flue-gas desulfurization
chemistry.chemical_compound
chemistry
Chemical engineering
Mechanics of Materials
Specific surface area
visual_art
Slurry
visual_art.visual_art_medium
021108 energy
Waste Management and Disposal
Dissolution
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 16118227 and 14384957
- Volume :
- 21
- Database :
- OpenAIRE
- Journal :
- Journal of Material Cycles and Waste Management
- Accession number :
- edsair.doi...........d1f28ef4214fed4c5661397e51646780