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RH用低碳深脱硫预熔渣 总被引:1,自引:0,他引:1
为实现低碳、超低碳钢在RH中进行深脱硫且钢水不增碳,在200kg真空感应炉上对RH用低碳深脱硫预熔渣进行了脱硫试验研究,结果表明:以CaO-Al2O3-SiO2-MgO为主的低碳深脱硫预熔渣熔点低、脱硫率高,可在真空条件下将钢液中硫的质量分数由30×10-6~50×10-6脱至10×10-6~20×10-6以下,脱硫率达到55%以上,脱硫效果好,脱硫率稳定。该预熔渣中碳的质量分数小于0.05%,在脱硫过程中钢水几乎不增碳,适用于在RH中低碳、超低碳钢深脱硫。研究表明:适当地提高炉渣的光学碱度,可大大地提高其硫容量,增强炉渣的脱硫能力。使用该预熔渣处理钢水有利于钢中夹杂物的去除和细化。 相似文献
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B2O3在CaO-BaO-SiO2-Al2O3-CaF2精炼渣中的作用 总被引:1,自引:0,他引:1
选择w(CaO)=46%,w(BaO)=10%,w(SiO2)=11.2%,w(Al2O3)=11.6%的渣作基础渣系,将B2q作助熔剂替代CaF2,发现B2q和CaF2的助熔效果相当,B2q可用作环保型助熔剂。将CaO-SiO2-BaO-Al2O3-CaF2作基础渣系,B2O3作酸性氧化物,在碱度(m(CaO+BaO)/m(SiO2+B2O3))为2.5和2.8时,研究B2O3替代SiO2后精炼渣的熔化性能。结果表明,B2O3替代25%的SiO2后就可大幅度降低粘度,并且发现富硼精炼渣的高温熔化性能稳定,粘度值稳定在0.3~0.5Pa·s。在碱度为2.8wt进行脱硫工艺实验,当w(SiO2)=20.6%时渣剂脱硫率为80%,当w(SiO2)=10.3%,w(B2O3)=10.3%时渣剂脱硫率为91.3%,主要原因是熔化性能良好的熔渣有助于提高传质速率。 相似文献
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The vacuum treatment for simultaneous desulphurization and dephosphorization of hot metal and molten steel with pre-melted CaO-based slag was carried out. For pre-treatment of hot metal, both desulphurization and dephosphorization are improved with the increase of CaO in slag, but deteriorated with the increase of CaF2 in slag. The average desulphurization and dephosphorization rate is 68.83% and 78.46 %, respectively. For molten steel, the sub-stitution of BaO for CaO in slag has minor effect on simultaneous desulphurization and dephosphorization. The desulphurization and dephosphorization rate is higher than 90 % and 50% respectively with the lowest final sulfur and phosphorus mass percent being 0. 001 2 % and 0. 010%, respectively. The overall effect of simultaneous desulphurization and dephosphorization of molten steel is better than that of hot metal. 相似文献
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Experimental Research on Refining Slag Systems Containing BaO for Ultra-Low Sulphur Steel 总被引:1,自引:0,他引:1
Sulphur ,asoneofharmfulelementsinsteel,isobservedatthegrainboundariesortheboundariesbetweendifferentphrasesintheformofMnS ,andtheperformanceofsteelproductisdeteriorated .Forpipelinesteel ,itisessentialthattheSSCCandHICcracksmustbe preventedasmuchaspossibl… 相似文献