Control method for reducing MnS inclusions in heavy rail by increasing Ca content in molten steel in refining process

The invention discloses a control method for reducing MnS inclusions in a heavy rail by increasing Ca content in molten steel in a refining process, which utilizes the characteristic that composite CaS inclusions are easy to float upwards to be removed, increases the consumption of silicon-calcium-barium alloy and the proportion of calcium element in a deoxidation process, effectively improves the desulfurization rate in a heavy rail smelting process, realizes stable control of sulfur content of the heavy rail, and improves the quality of the heavy rail. And the number of A-type inclusions in the heavy rail is effectively reduced. The method has high reliability and practicability, can effectively reduce the A-type inclusions in the steel, improves the purity of the molten steel, and realizes the improvement of economic benefits. 本发明公开了一种通过提高精炼过程钢水中Ca含量减少重轨中MnS夹杂物控制方法，利用复合CaS夹杂物易上浮去除的特征，增加脱氧过程硅钙钡合金用量和钙元素比重，有效的提高重轨冶炼过程脱硫率，实现重轨硫含量稳定控制，有效减少重轨中A类夹杂物的数量。这种方法具有高的可靠性和实用性，可以有效降低钢中A类夹杂物，提高钢液纯净度，实现经济效益的提升。