共查询到19条相似文献,搜索用时 203 毫秒
1.
2.
分析了转炉冶炼轴承钢的优势,对转炉轴承钢氧含量、钛含量偏高和精炼工艺存在的问题进行了讨论,认为精确控制转炉吹炼终点,实现高碳低氧出钢、控制出钢下渣量成为转炉冶炼轴承钢的重要环节;在精炼方面,应加强钢包顶渣脱氧、保证一定的钢水[ALs]含量和提高氩气搅拌效果. 相似文献
3.
本文论述了济钢宽厚板厂转炉出钢采用的下渣检测的原理和使用效果;通过实际冶炼情况得知出钢下渣检测可以有效提高合金收得率,净化钢水成分,为钢水精炼提供良好的条件;在当今钢铁业微利时代转炉出钢下渣检测是一种易于实现的降本增效的技术手段。 相似文献
4.
5.
6.
为有效控制低碳低硅钢冶炼过程增硅,对低碳低硅铝镇静钢SPHD各工序生产实践增硅因素进行了分析.结果表明:转炉过吹及出钢过程下渣是钢水增硅的重要原因;LF精炼过程钢水增硅主要发生在较强的还原气氛下,钢中的铝与精炼渣中的SiO2反应,以及钙处理工艺也是钢水增硅的重要因素. 相似文献
7.
8.
9.
10.
通过对转炉终点、出钢下渣质控点的控制以降低钢水初始氧;采用LF快速成渣、稳定白渣时间、钙处理等去除夹杂物;并在连铸加强保护浇注以减少钢水二次氧化以及留钢操作,避免卷渣影响钢水纯净度等各工序的关键质控点控制,最终实现42CrMoA合金结构钢的开发,且钢中非金属夹杂物等级满足要求。 相似文献
11.
12.
13.
介绍了天铁热轧板公司应用直上渣洗工艺生产SPHC的过程.通过转炉出钢过程中直接进行渣洗,同时吹氩精炼以促进夹杂物上浮和净化钢液,然后直接进行连铸,可解决提炼过程易增碳和增硅的问题,钢水流动性好,同时降低了冶炼成本. 相似文献
14.
YANG Yunqing LIU Yan HAO Yanqin SHEN Yueming JIN Haijun AN Shoubing Ningbo Iron & Steel Co. Ltd. Ningbo Zhejiang China 《Baosteel Technical Research》2010,(Z1):16
The paper mainly discussed the inclusions and the purity of molten steel and continuous casting slab in tapping,argon-bubbling,LF refining,VD vacuum degassing and continuous casting tundish processes during the steel making.At the same time,the improvement measures of smelting process were indicated. Si-Al-Ba alloy and Ca-Si deoxidation eventually were adopted in 120 t converter.The amount of the tapping was about 135t.After feeding Al wire and adding premelted slag in furnace,picked up the sample after ... 相似文献
15.
介绍了迁安轧一钢铁集团炼钢厂生产低碳低硅铝镇静钢SPHC的生产实践。通过优化生产工艺,控制转炉出钢过程中下渣量,保护浇铸,LF炉精炼等措施,使钢水成分得到精确控制,钢中夹杂物大量减少,钢水的可浇性提高,铸坯表面及内部质量均达到了标准要求,满足了用户需求。 相似文献
16.
The dephosphorization process test was carried out in a domestic converter steel plant by using the “remaining slag double slag” process technology. The results show that with the increasing of dephosphorization rate in early stage of converter, the end point dephosphorization rate increases continuously. The silicon content in molten iron has the greatest influence on the dephosphorization rate in early stage. According to the composition of molten iron, properly reducing the oxygen supply intensity, reducing the gas solid oxygen ratio,adding an appropriate amount of lime and sinter in early stage of smelting are conducive to the improvement of dephosphorization rate in early stage. Adding lime of 4-8kg per ton of molten steel in the first turn down stage does not affect the tapping temperature, which can improve the dephosphorization rate in the first turn down to end point stage and the end point dephosphorization rate at the same time. From the control effect of the end point, the alkalinity of the end point slag should not be less than 3.0, the mass fraction of FeO in the slag should be 16%-20%, and the end point tapping temperature should be appropriately reduced to 1610-1630℃, which is conducive to the improvement of the end point dephosphorization rate. By strengthening of the stirring of molten pool and promoting the balance of the steel slag reaction, it is conducive to improvement of the end point phosphorus distribution ratio, so as to further improve the end point dephosphorization rate. 相似文献
17.
18.
19.
摘要:在国内某转炉钢厂采用“留渣 双渣”工艺技术进行脱磷工艺试验。结果表明:随着转炉前期脱磷率不断升高,终点脱磷率不断提高。铁水硅含量对前期脱磷率的影响最大。根据铁水成分,在冶炼前期适当降低供氧强度、降低气固氧比、加入适量石灰及烧结矿,均有利于前期脱磷率的提高。在一倒时每吨钢液加入4~8kg石灰,不影响出钢温度,可提高一倒-终点阶段脱磷率,同时可提高终点脱磷率。从终点的控制效果可知,终点炉渣碱度应保持不小于3.0,炉渣中FeO质量分数在16%~20%,并适当降低终点出钢温度在1610~1630℃,有利于终点脱磷率的提高。通过加强熔池搅拌,促进钢渣反应趋于平衡,有利于终点磷分配比提高,从而可进一步提高终点脱磷率。 相似文献