首页> 外国专利> A METHOD OF PRODUCING LOW PHOSPHORUS STEEL CONTAINING BELOW 0.010 PHOSPHORUS FROM HIGH PHOSPHORUS LIQUID STEEL IN BASIC OXYGEN STEELMAKING

A METHOD OF PRODUCING LOW PHOSPHORUS STEEL CONTAINING BELOW 0.010 PHOSPHORUS FROM HIGH PHOSPHORUS LIQUID STEEL IN BASIC OXYGEN STEELMAKING

机译:在碱性氧气炼钢中由高磷液态钢生产磷含量低于0.010%的低磷钢的方法

摘要

This invention relates to a method of producing low phosphorus steel containing below 0.010% phosphorus from high phosphorus hot metal charged in a single slag basic oxygen furnace comprising the steps of maintaining a low slag basicity in liquid steel in the range of 2.5 to 2.7 at 1600°C to 1650°C with FeO% in the slag in the range of 10 to 30% mass through additions of measured quantities of calcined lime in pulverized and/or briquetted forms, continuously or in batches upto the completion of melting, maintaining equillbrium phosphorus partion ratio in the range of 280-340 and lower PSUB2OSUB5 activity in the slag in the range of -20.2 to -19.6 in log scale which ensures complete phosphorus removal in the slag upto 99.99% and also prevent any MgO dissolution from the refractory lining in the slag.
机译:本发明涉及一种由装在单渣碱性氧气炉中的高磷铁水生产磷含量低于0.010%的低磷钢的方法,该方法包括在1600下保持液态钢中低渣碱度在2.5-2.7范围内的步骤。在16°C到1650°C的温度范围内,通过连续或分批添加一定量的粉石灰和/或团块形式的煅烧石灰,使炉渣中的FeO%占质量的10%至30%,直到达到熔化为止,并保持磷平衡分馏比在280-340范围内,炉渣中P 2O 5活性较低,对数刻度范围为-20.2至-19.6,这确保了炉渣中的除磷率高达99.99%,并且还可以防止任何MgO从炉渣中的耐火衬里溶出。

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