摘要
含钛低碳钢（／％：0．05～0．10C、0．70—0．95Si、1．45～1．65Mn、≤0．025P、≤0．025S、0．10—0．20Ti）的生产流程为高炉铁水．35tLD．LF．150mm×150mm连铸工艺。用少量铝脱氧的含钛低碳钢，由于LF精炼渣（／％：55～59CAO、21．9—26．5Si02、9．4—14．3A1：0，）中A1203含量较高，使LF精炼过程中钢水铝含量增加和20t中间包水口结瘤，影响连铸顺行。在热力学计算的基础上，优化了冶炼工艺，转炉出钢不加铝锰铁，使用低铝硅铁代替普通硅铁，精炼渣不加高铝矾土，优化精炼渣成分（／％：56．1～65．6CaO、19．3～27．2SiO：、5．1～9．1A1：03），钢水中A1含量由0．007％～0．018％降至0．001％-0．009％，有效减少中间包水口结瘤的发生。连浇炉数由原来的3～6炉提高到9—16炉。
The production flow sheet for titanium-containing low carbon steel （/% ： 0. 05 - 0. 10C, 0. 70 - 0. 95Si, 1.45 - 1.65Mn,≤0. 025P, ≤0. 025S, 0. 10 -0. 20Ti） is BF hot metal-35 t LD-LF-150 mm x 150 mm casting process. For titanium-containing low carbon steel deoxidizing by minor aluminium due to higher A12 03 content in LF refining slag （/% ： 55 -59CaO, 21.9 -26. 5SiO2 , 9. 4 - 14. 3A1203 ） , during LF process the aluminium content in liquid increases and the 20 t tundish nozzle blocking easily occurs to effect casting smooth-going. Based on thermodynamics calculation, the steelmaking process is optimum including in BOF tapping non-adding manganese-aluminium iron and using low aluminium silicon iron to replace common silicon iron, non-adding high alumina in refining slag and optimizing refining slag ingredient （/% ： 56. 1 -65.6CaO, 19. 3 -27.2SiO2, 5. 1 - 9. 1A1203 ）, the A1 content in liquid decreases from original 0. 00＂7% - 0. 018% to 0. 001% -0. 009% , it is available to decrease the occurrence of nozzle blocking. The eontinnous-continuous castin heats increase from original 3 -6 heats to 9 - 16 Heats.
出处
《特殊钢》
北大核心
2013年第5期38-40,共3页
Special Steel
关键词
含钛低碳钢LF精炼渣钢水增铝
水口结瘤
Index Titanium-Containing Low Carbon Steel, LF Refining Slag, Aluminium Raising in Liquid, NozzleBlocking
