We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Preparation and Properties of SiC Assembled Large Block for Blast Furnace Tuyeres.
- Authors
LYU Chunjiang; CHANG Cheng; HUANG Yifei; CAO Huiyan; ZHU Chong
- Abstract
A SiC assembled large block for blast furnace tuyeres was prepared using silicon carbide particles (3-1 and 1-0.088 mm) and fine powder (<0.088 mm), silicon powder (<0.088 mm), industrial carbon black (N990), microsilica, ρ-Al2O3 powder, etc. as raw materials. The developed block was compared with a silicon nitride bonded silicon carbide brick, a self-bonded silicon carbide brick and an imported self-bonded silicon carbide block to analyze and evaluate their service performance. The results show that: (1) in the 0-100 mm zone, the SiC large block mainly consists of β-SiC and nitrides such as O'-SiAlON, β-SiAlON, a-Si3N4, and Si2N2O, the bulk density is 2.68-2.70 g·cm-3, the apparent porosity is 14%-15%, and the material structure is uniform; (2) in the 0-100 mm zone, β-SiC nano-whiskers intercalate with nitrides; with the depth increasing, the number of flocculent β-SiC nano-whiskers increases, while the number of nitrides decreases; when the depth reaches 150 mm or more, the main bonding phases are β-SiC and mullite; (3) compared with the reference products, the developed SiC large block has a good basic performance, and after alkali corrosion, the mass change rate is -0.1%, which is obviously superior to the imported self-bonded silicon carbide and the homemade silicon nitride bonded silicon carbide materials.
- Subjects
BLAST furnaces; SILICON carbide; RAW materials; POROSITY; PERFORMANCE evaluation
- Publication
China's Refractories, 2023, Vol 32, Issue 4, p1
- ISSN
1004-4493
- Publication type
Article
- DOI
10.19691/j.cnki.1004-4493.2023.04.001