研究含B2O3的Al2O3-Fe2O3基无氟复合造渣剂快速造渣及其机理。在杭钢炼钢厂40 t转炉上进行含B2O3的Al2O3-Fe2O3基无氟复合造渣剂的工业性试验。试验表明该造渣剂冶金特性良好,能提前0.5～1.0 min化渣;全程化渣好,基本上不喷溅,不返干;钢铁料、石灰等的消耗有所降低。这些结果表明在转炉冶炼前期,提高炉渣(Al2O3)和(B2O3)含量有利于快速化渣。 Study on fast slag-making and its mechanism of Al2O3-Fe2O3-based fluorine-free composite slagging agent containing B2O3. The industrial test of B2O3-free Al2O3-Fe2O3-based fluorine-free composite slagging agent was carried out on a 40 t converter at Hangzhou Iron and Steel Plant. Experiments show that the slag-forming agent has good metallurgical properties and can reduce slag 0.5 ~ 1.0 min in advance. The slag in the entire process is good, it is basically not splashed and does not return to the dry state, and the consumption of steel materials, lime and the like is reduced. These results show that increasing the slag (Al2O3) and (B2O3) content in the early stage of converter smelting is beneficial for quick slag.