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一、目前中包浇铸采用定径水口加保护套管形式存在的问题现有板坯连铸机中包浇铸采用定径水口加保护套管形式实行中包的保护浇铸。经过初炼和精炼的钢液,在运往浇注工位和浇注过程中由于与空气中的氧、耐火材料、炉渣接触而发生钢液的二次氧化,其产物部分滞留在钢中造成非金属夹杂物,使钢的清洁度降低。尤其是在钢水从中间包至结晶器注流时,由于二次氧化产生的非金属夹杂物影响钢水的清洁度,对造成钢坯质量下降的影响较大。钢水从中间包至结晶器浇注过程中发生二次氧化的氧源有以下几种途径:1.注流与空气接触的直接氧化;2.注流卷入空气与中间包、结
First, the current package casting sizing nozzle with a protective sleeve of the existing problems Existing slab caster bag casting sizing nozzle with a protective sleeve in the form of protection package casting. After the initial refining and refining of liquid steel, pouring into the pouring station and pouring process due to the air with oxygen, refractory, slag contact occurred secondary oxidation of molten steel, the product part of the stay in the steel caused by non-metallic inclusions Material, reduce the cleanliness of the steel. Especially when the molten steel flows from the tundish to the mold, the non-metallic inclusions generated by the secondary oxidation affect the cleanliness of the molten steel, which greatly affects the quality of the billet. The molten steel from the tundish to the casting mold during the second oxidation of the oxygen source has the following ways: 1 injection of direct contact with air oxidation; 2 injection flow into the air and the tundish, knot