WANG Yi-ci
,
ZHANG Jian-liang
,
ZHANG Fang
,
LUO Guo-ping
钢铁研究学报(英文版)
Influence of sintering temperature, basicity and MgO content on the formation characteristics of calcium ferrite in low silicon sinter of Baotou Iron and Steel Company was studied by means of mini-sintering test and mineralographic microscope analysis. In addition, the suitable sintering parameters such as temperature and basicity were explored. The results found that optimum temperature for the formation of calcium ferrite is 1280 ℃, the basicity of 25-28 is helpful to the development of acicular or columnar calcium ferrite, and MgO content in the low silicon sintering raw materials should be lower than 28% because MgO can intensively inhibit the formation of calcium ferrite. And calcium ferrite in the sinter belongs to calcium ferrite with low calcium, which is different from that in ordinary sinter at home and abroad. So, it provided theoretical basis for promoting formation of calcium ferrite in low silicon sinter and improving properties of sinter.
关键词:
low silicon sinter
,
formation characteristics
,
calcium ferrite
,
sintering temperature
,
basicity
何肖飞
,
王新华
,
陈书浩
,
王万军
钢铁
为满足用户对钢中磷含量的要求，攀钢采用“双渣法”转炉脱磷工艺开展脱磷试验，并根据生产条件和转炉工艺特点考察转炉脱磷专用氧枪的实际使用效果。试验中，转炉工艺冶炼前期低温脱磷，后期脱碳升温，吹炼前期采用低供氧强度脱磷喷枪，倒渣时切换为常规吹炼喷枪。在吹炼脱磷前期结束扒渣后，熔池中的w(［P］)下降至0040%以下，脱磷率为47.9%。在试验终点钢水中的w(［P］)均在0.010%以下，波动范围在0.006%~0.010%，w(［P］)的平均值是0.0081%。终点脱磷率波动范围是84.4%~92%，平均值是88.3%。
关键词:
脱磷
,
double slag process
,
oxygen lance
,
slag
,
basicity
