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FF12RW情報提供 : Common sense problems that steelmaking must understand (1)

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wangkiky
  • 登録日: 2016-1-8
  • 居住地:
  • 投稿: 10629
Common sense problems that steelmaking must understand (1)

1. Ways to accelerate lime slag?
Answer: 1 improve the quality of lime, use soft-burning active lime; 2 properly improve the composition of the flux; 3 increase the blowing temperature; 4 control the appropriate gun position; 5 use synthetic slag.

2. Why should molten steel be deoxidized?
Answer: The molten steel is not deoxidized, and the correct solidification structure cannot be obtained even in the continuous casting. High oxygen content in steel can also cause defects such as subcutaneous bubbles and looseness, and exacerbate the harmful effects of sulfur. The generated oxide inclusions remain in the steel, which reduces the mechanical properties such as plasticity and impact toughness of the steel. Therefore, it is necessary to remove excess oxygen in the steel.

3. What aspects should be prevented from explosive splashing during the blowing process?
Answer: (1) Control the temperature of the molten pool. (2) Control (TFe) does not occur. (3) Do not drop the gun easily once the splashing process occurs. (4) When the furnace temperature is high, it is possible to appropriately add white ash thickening slag while lifting the gun.

4. What is the cause of damage to the lining?
Answer: (1) Impact and mechanical wear of scrap steel and molten iron on the lining. (2) Stirring of molten steel and slag and gas flushing. (3) Chemical attack of the slag on the lining. (4) Cracking and flaking of lining temperature chilling, stimulating heat change and tissue change. (5) Mechanical peeling at the beginning of the furnace. (6) Oxidation of carbon inside the lining brick.


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