Briefly describe the characteristics and mineral composition of slag in the middle of smelting
In the middle of smelting, the reaction of carbon and oxygen in the furnace is intense, and the slag is prone to back-drying. Its characteristics are high alkalinity and low ferrous oxide content. When the slag has a mineral composition: the main phase is dicalcium silicate and tricalcium silicate. When the lime is added, there is more free CaO. The higher the alkalinity, the larger the amount of tricalcium silicate, and the more free CaO, which is unfavorable for the smelting effect.
What is the main way to reduce blow damage?
A. Concentrate policy, reducing slag
B. Reasonable slagging system
C. Adopt a reasonable oxygen supply system and a loading system to reduce mechanical splashing.
D. Using thermal compensation technology, put more scrap steel and reduce chemical burning.
E. Use reasonable re-blowing technology.