Hot Repairing Material For Ladle Based on Self Propogating High Temperature Synthesis Reaction
| Autor: | ErfanSuprayugi, 吳文彬 |
|---|---|
| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 Rich alumina spinel bricks are used as refractory lining inside ladle. In contact with molten steel and molten slag, they suffer of degradation to molten steel and molten slag due to corrosion by penetration and reaction of molten steel and molten slag and limit their performance. Refractory repairing material is needed in order to reduce the corrosion effect of alumina spinel bricks and increasing their durability contact with molten steel and molten slag. Hot repairing material with gunning technique was developed in recent years. The purpose of this thesis is developing hot repairing materials based on the self propogating high temperature synthesis (SHS) reaction. Self propogating high temperature synthesis reparing material based on the sintering process of metallic material is believed have a high bonding strength with ladle brick refractory and suitable used in repairing condition of ladle furnace. SHS hot repairing materials were formulated four major constituents: aluminum and magnesium as a fuel, oxidizer (intentionally added metal oxides or naturally available O2 in air), inert as framework (china steel refractory material with various particle size distribution) and additives (for modifying combustion or product properties). To evaluate the mechanical properties and degree of conversion, various SHS repairing material system which consists of oxidizer system and non-oxide system has been developed. In advanced, non oxide system with 44 wt% of Al, 6 wt% of Mg and inert 50% added with 3 wt% of Titanium oxide, 3 wt % of zirconia oxide, 4 wt% of calcium aluminate cement and 1.5 wt% of sodium silicate has a result : MOR (0.58 MPa), Rebound loss (11.52 wt%), apparent porosity (24.04), metal corrosion rate (0.06 mm/hr) and molten slag corrosion rate (0.92 mm/hr). |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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