Calcium oxide-based desulfurizer for steelmaking and preparation method thereof

Abstract

The invention discloses a desulfurizer for steelmaking based on calcium oxide and a preparation method thereof. The desulfurizer is prepared from the following raw materials in parts by weight: 30-35 parts of calcium oxide, 15-20 parts of aluminum ash, and 14 parts of iron slag ‑18 parts, 8‑9 parts of calcium difluoride, 6‑8 parts of barium carbonate, 5‑7 parts of attapulgite, 4‑6 parts of boric anhydride, 3‑7 parts of flame retardant silicone grease; the desulfurizer of the present invention It is prepared based on calcium oxide, and aluminum ash and iron slag are added at the same time, which realizes resource reuse and reduces production costs. The desulfurizer has improved purity, stable performance, and good desulfurization effect. Larger contact surface with sodium hydroxide powder, while the stirring tube rotates, it can heat the mixing material 2 and sodium hydroxide powder evenly, so as to speed up the removal of impurities in the iron slag, ensure the purity of the desulfurizer, and improve production efficiency.

Description

technical field [0001] The invention relates to a desulfurizer, in particular to a calcium oxide-based desulfurizer for steelmaking and a preparation method thereof. Background technique [0002] In iron and steel materials, the sulfur content directly affects its performance. Excessive sulfur content in the steel will lead to deterioration of the thermal processing performance of the steel, resulting in "hot embrittlement" of the steel; cracks; the plasticity of steel also significantly deteriorates with the increase of sulfur content; in pure iron or silicon steel sheets, the high sulfur content increases the hysteresis loss. So desulfurization has become one of the main goals in iron and steel smelting. Desulfurization of molten iron is considered to be the main method to reduce the metallurgical load of blast furnaces and converters and improve technical and economic indicators, and has also become an indispensable technical means for smelting low-sulfur clean steel; tr...

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Problems solved by technology

[0003] The object of the present invention is to provide a calcium oxide-based desulfurizer for steelmaking and its preparation method. The desulfurizer of the present invention is prepared based on calcium oxide, and aluminum ash and iron slag are added at the same time to realize resource reuse and reduce production costs. , by adding attapulgite with good adsorption performance to the raw materials for desulfurization agent preparation, the stability of sulfide in desulfurization slag can be significantly improved, and the phenomenon of resulfurization can be effectively prevented; the desulfurization reaction speed is significantly improved, and the desulfurization effect is good. Through Soak the aluminum ash in hot water, so that the free carbon in the aluminum ash escapes from the interior of the aluminum ash and adheres to the surface of the aluminum ash. At the same time, impurities such as silicon oxide and titanium oxide are removed. By adding sodium hydroxide powder It can remove impurities such as silicon oxide and chromium oxide in iron slag, so that the prepared desulfurizer has improved purity, stable performance and good desulfurization effect, which solves the problem of high cost, unstable performance, low purity and poor desulfurization effect of traditional desulfurizers used in steelmaking. Poor technical issues;

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