Preparation method of high-aluminum slag-modifier pellets for molten steel refining

用于钢水精炼的高铝调渣剂球团制备方法

Abstract

本发明公开了涉及钢水精炼技术领域,尤其是一种用于钢水精炼的高铝调渣剂球团制备方法。用于钢水精炼的高铝调渣剂球团制备方法,依次执行以下步骤:a、将钢包铸余渣通过破碎机破碎,然后通过筛子筛选出第一铸余渣颗粒;b、对第一铸余渣颗粒进筛选出第二铸余渣颗粒;c、将第二铸余渣颗粒、矾土粉、铝粒或铝粉加入混料搅拌机中干混均匀;d、在第一混料中然后加入定量比例的水,边喷水边搅拌,直至混匀,得到第二混料,e、将搅拌混匀的第二混料送入冷压成型机中压制成椭圆形;f、冷压成型后自然晾晒干燥,再经烘烤干燥后筛分制得高铝调渣剂球团。该方法制备出的高铝调渣剂球团是利用回收的钢包铸余渣颗粒,显著地降低了成本。
The invention relates to the technical field of molten steel refining, in particular to a preparation method of high-aluminum slag-modifier pellets for molten steel refining. The preparation method of the high-aluminum slag-modifier pellets for molten steel refining includes the following steps in sequence that (1) ladle casting residual slag is crushed by a crusher, and then first casting residual slag particles are sieved by a sieve; (2), second casting residual slag particles are sieved from the first casting residual slag particles; (3), the second casting residual slag particles, alumina powder and aluminum particles or aluminum powder are added into a mixing agitator to be uniformly blended in a dry manner; (4), then, water in a certain proportion is added into a first mixed material, stirring is performed while water is sprayed till the material is uniformly mixed, and a second mixed material is obtained; (5), the stirred and uniformly mixed second mixed material is sent to a cold pressing molding machine to be pressed into an oval shape; (6), the material obtained after cold pressing molding is performed is naturally aired and dried, sieving is performed after baking and drying are performed, and the high-aluminum slag-modifier pellets are obtained. The recycled ladle casting residual slag particles are adopted for the high-aluminum slag-modifier pellets prepared through the method, and the cost is remarkably lowered.

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