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为了降低精炼渣对钢包渣线镁碳砖的侵蚀,分别以20%(w)的冶金熔剂铝酸钙、铝镁酸钙和CaF2与80%(w)的初始钢渣配制成三种精炼渣,以镁碳砖为感应炉的坩埚,在坩埚内放入钢样,待钢样熔化并升温到1 600℃时,加精炼渣持续冶炼5 h(期间共更换渣8次),冷却后测镁碳砖渣线部位的侵蚀(渗透)深度并进行SEM分析。结果表明:以铝酸钙和铝镁酸钙为熔剂的精炼渣都比以CaF2为熔剂的精炼渣对镁碳砖的渗透浅、侵蚀小,而以铝镁酸钙冶金熔剂为精炼渣比以铝酸钙冶金熔剂为精炼渣对镁碳砖的渗透和侵蚀性都大大降低。这是由于铝镁酸钙中含有饱和的MgO,减缓了镁碳砖中MgO向CMA渣中的溶解,从而降低了渣对镁碳砖的侵蚀。
In order to reduce the erosion of ladle slag line magnesia-carbon brick, the refining slag was prepared into three kinds of refining slag with 20% (w) of the metallurgical flux of calcium aluminate, calcium magnesium aluminate and CaF2 and 80% (w) Magnesia carbon brick as the crucible of the induction furnace, the sample into the crucible, to be steel sample melting and heating to 1 600 ℃, the refining smelting continued smelting 5 h (during a total of 8 replacement slag), measured after cooling magnesium The depth of erosion (penetration) of the carbon brick slag line and SEM analysis. The results showed that the refining slag with calcium aluminate and calcium magnesium aluminate as flux had less penetration and less erosion than the refining slag with CaF2 as flux. However, with the calcium aluminometasilicate flux as refining slag ratio Calcium aluminate smelting flux for refining slag on the infiltration and erosion of magnesium carbon bricks are greatly reduced. This is due to the fact that magnesium aluminate contains saturated MgO, which slows the dissolution of MgO from MgO into CMA slag, thereby reducing the erosion of slag on the MgO-C brick.