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氧气炼钢初期由于硅反应激烈进行,生成的炉渣呈酸性,且熔点低,所以对碱性炉衬材料侵蚀严重,使炉衬寿命缩短。因此,CaO和MgO等造渣材料的初期熔化性是非常重要的。向渣中添加MgO,对延长镁质炉衬材料的寿命很有效,死烧MgO比轻烧MgO的优越之处在于可以减少MgO的用量,但是死烧MgO的熔化速度慢,所以必须给予特殊处理:①为了加快死烧MgO的熔化速度,必须增加其反应表面积,但粉状死烧MgO难于加入炉内,所以必须适当地造块;②为了使死烧MgO在较低的温度下熔化,必须加入少
In the early stage of oxygen steelmaking, due to intense reaction of silicon, the resulting slag is acidic and has a low melting point. Therefore, the corrosion of the basic lining material is severe, which shortens the service life of the lining. Therefore, initial melting properties of slagging materials such as CaO and MgO are very important. The addition of MgO to slag is very effective in prolonging the life of magnesia lining materials. The advantage of burning MgO over MgO is that it can reduce the amount of MgO, but the burning rate of MgO is slow, so special treatment must be given: ① In order to speed up the melting rate of dead MgO, it is necessary to increase the reaction surface area, but powdery burned MgO difficult to join the furnace, it must be appropriate block; ② In order to make the burning MgO at a lower temperature melting must be added less