Calcium oxide-based steelmaking desulfurizing agent and preparation method thereof

The invention discloses a calcium oxide-based steelmaking desulfurizing agent and a preparation method thereof. The desulfurizing agent is prepared from, by weight, 30-35 parts of calcium oxide, 15-20parts of aluminum ash, 14-18 parts of iron slag, 8-9 parts of calcium difluoride, 6-8 parts of barium carbonate, 5-7 parts of attapulgite, 4-6 parts of boric anhydride and 3-7 parts of flame-retardant silicone grease. The desulfurizing agent is prepared based on the calcium oxide, and meanwhile the aluminum ash and the iron slag are added, so that resource recycling is realized, and the production cost is lowered; the purity of the desulfurizing agent is improved, the performance is stable, and the desulfurizing effect is good; and a second mixture obtained after grinding of the desulfurizingagent is fine, the contact area with sodium hydroxide powder can be increased, and the second mixture and the sodium hydroxide powder can be uniformly heated during rotation of a stirring pipe, so that the removal of impuriti