About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Characterization of Minerals, Metals and Materials
|
Presentation Title |
Characterization of Chromite and Its Role in the Refractory Products |
Author(s) |
Dean Gregurek, Philip Walter Schantl, Alfred Spanring |
On-Site Speaker (Planned) |
Dean Gregurek |
Abstract Scope |
In the refractory industry chromite is an important raw material, particularly in the production of magnesia-chromite bricks. Thus, the characterization of chromite is important issue before the final application in the refractory products. Refractories lined in the copper, nickel and lead furnaces are exposed to either continuous or discontinuous wear. The continuous wear is mainly caused due to corrosion of refractory by dissolution in slag. The main advantage of the chromite within the magnesia-chromite bricks is high corrosion resistance against acidic slags. The lower chromite solubility in such slag can be explained by phase diagrams (i.e., miscibility gap between chromium and silica in the Cr2O3-SiO2 phase diagram) and FactSageTM calculations. The addition of chromite additionally improves the thermo-mechanical properties of the refractory and reduces the brittleness. This is the main advantage in the batch-wise processes were discontinuous wear caused by production interruptions and frequent thermal shocks is the predominant wear. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Characterization, Pyrometallurgy |