Sulphide Capacity of CaO-Al_2O_3-MgO Slag

CaO-Al_2O_3-MgO渣的硫化物容量

• 批准号: 02453054
• 负责人: BAN-YA Shiro
• 金额: $ 3.97万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02453054/
• 关键词: Secondary refining; CaO-Al_2O_3 slag; Desulphurization; Sulphide Capacity; Steelmaking; Physical chemistry; CaO-Al_2O_3-MgO slag; Sulphur distribution ratio

Many kinds of secondary steelmaking process have been developed recently to product highly purified steel, where CaO-Al_2O_3 system has been utilized as industrial flux. Therefore, the sulphide capacities of CaO-Al_2O_3, CaO-Al_2O_3-MgO, where MgO is dissolved from refractories, and CaO-Al_2O_3-SiO_2 slags, where SiO_2 is brought via steelmaking. process, were studied to estimate the sulphur distribution ratio between secondary steelmaking slag and liquid slag.The slag samples were equilibrated with Ar-CO-CO_2-SO_2 gas mixtures at 1823 to 1923 K. After reaching equilibrium, the samples were quenched and crushed to determine the contents of constituents and sulphur by chemical analysis.The present result of sulphide capacity in CaO-Al_20_3 slag agreed well with the previous works. From the obtained results, it was confirmed that substitution of CaO to MgO or SiO_2 at a given N_<Al_2O_2> decreased the sulphide capacities. The evaluated values of sulphur distribution ratio for both slags was higher than 1000 at 1873 K on the condition of CaO-saturation if the dissolved aluminium content in steel was assumed to be 0.01%.

近年来，为生产高纯度钢，开发了多种炉外精炼工艺，其中CaO-Al_2 O_3系已被用作工业熔剂。因此，CaO-Al_2 O_3、CaO-Al_2 O_3-MgO（MgO从耐火材料中溶出）和CaO-Al_2 O_3-SiO_2渣（SiO_2从炼钢过程中带入）的硫容量均有所降低。用Ar-CO-CO_2-SO_2混合气体在1823 ~ 1923 K平衡渣样，研究了渣样中硫在渣液中的分配比。达到平衡后，将试样急冷破碎，用化学分析法测定各组分和硫含量，本研究结果与前人工作结果吻合较好。实验结果表明，在一定的N_2下，CaO取代MgO或SiO_2可降低<Al_2O_2>硫容量。在1873 K时，当钢中溶解铝含量为0.01%时，CaO饱和时，两种渣的硫分配比均大于1000。

项目成果

Mitsutaka HINO: "Sulphide Capacities of CaO-Al_2O_3-Mgo and CaO-Al_2O_3-SiO_2 Slags" ISIJ International. 33. (1993)

Mitsutaka HINO：“CaO-Al_2O_3-Mgo 和 CaO-Al_2O_3-SiO_2 炉渣的硫化物容量”ISIJ International。

S. Ban-ya, M. Hino and S. Kitagawa: "Sulphide Capacities of CaO-Al_2O_3-MgO and CaO-Al_2O_3-SiO_<> Slags" Jpn. Soc. Prom. Sci., 19th-Sub., Tech. Paper. No. 11305. 1-1-1-13 (1992)

S. Ban-ya、M. Hino 和 S. Kitakawa：“CaO-Al_2O_3-MgO 和 CaO-Al_2O_3-SiO_<> 炉渣的硫化物容量”Jpn。

萬谷 志郎: "CaOーAl_2O_3ーMgO及びCaOーAl_2O_3ーSiO_2系スラグのサルファイド・キャパシティ" 日本学術振興会19委ー11305、反応ー759. 1-1-1-13 (1992)

Shiro Manya：“CaO-Al_2O_3-MgO和CaO-Al_2O_3-SiO_2系炉渣的硫化物容量”日本学术振兴会第19委员会11305，Reaction-759（1992）。

M. Hino, S. Kitagawa and S. Ban-ya: "Sulphide Capacities of CaO-Al_2O_3-MgO and CaO-Al_2O_3-SiO_2 Slags" ISIJ International. 33. (1993)

M. Hino、S. Kitakawa 和 S. Ban-ya：“CaO-Al_2O_3-MgO 和 CaO-Al_2O_3-SiO_2 炉渣的硫化物容量”ISIJ International。

S. Ban-Ya, M. Hino and S. Kitagawa: "Sulphide Capacities of CaO-Al_2O_3-MgO and CaO-Al_2O_3-SiO_<> Slags" CAMP-ISIJ. 5. 8 (1992)

S. Ban-Ya、M. Hino 和 S. Kitakawa：“CaO-Al_2O_3-MgO 和 CaO-Al_2O_3-SiO_<> 炉渣的硫化物容量”CAMP-ISIJ。