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procedure for the control of a stalferskningsforfarande for steel with a carbon content of 0.1 to 0.8 mass.
procedure for the control of a stalferskningsforfarande for steel with a carbon content of 0.1 to 0.8 mass.
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机译：控制碳含量为0.1至0.8质量％的钢的伐木工艺的程序。
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摘要
Process for controlling a steel refining process for steels having a carbon content within the range of 0.1-0.8 percent by weight, in which the desired final carbon content of the metal bath and the final temperature of the metal bath at the end point of the blowing period are being directly piloted or controlled or headed for, characterized in that the blowing period is being subdivided into three immediately successive stages during each of which the amount of blowing oxygen supplied is maintained constant, thereby selecting the duration of the first blowing period essentially in dependence on the pig iron analysis and on the oxygen flow and making said duration longer with higher Si-and-Mn-content and making said duration shorter with higher oxygen flow, whereupon at the end of this first blowing stage, the oxygen blowing lance is being lowered in an oxygen surface blowing process, noting that all additional materials, such as lime, ore and fluxes, are being added up till the end of this first blowing stage and lime is added in such an amount which, under consideration of the constant oxygen flow at the end of the second blowing period having its duration determined by the oxygen flow and being made shorter with higher oxygen flow, results in saturation of the slag in lime and, respectively, dicalciumsilicate, thereby piloting or heading for a slag basicity of at least 2.8 and a minimum amount of slag of 50 kg/ton of pig iron and maintaining a maximum P-content of 0.04 percent by weight within the crude steel and a minimum Mn-content of 0.2 percent by weight within the crude steel, whereupon in an oxygen blowing process, the lance position is again changed at the end of this second blowing stage, and in that the duration of the subsequent third blowing stage is, under consideration of the constant oxygen flow, selected in dependence on the desired final carbon content and the desired final temperature of the metal bath, noting that for producing steels of higher carbon content refining of the charge is being stopped already during the second blowing stage.
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机译：控制碳含量在0.1-0.8％（重量）范围内的钢的精炼工艺的方法，其中，金属熔池的所需最终碳含量和吹炼终点的金属熔池最终温度其特征在于，将吹炼期分为三个直接连续的阶段，在每个阶段中，所供应的吹炼氧气量保持恒定，从而基本上选择第一吹炼期的持续时间为取决于生铁分析和氧气流量，并在较高的Si和Mn含量下使上述持续时间更长，而在较高的氧气流量下使上述持续时间更短，因此，在该第一吹炼阶段结束时，吹氧喷枪为在氧气表面吹制过程中被降低，请注意所有其他物质（例如石灰，矿石和助熔剂）都将被添加到在第一吹炼阶段，加入石灰的量应考虑到第二吹炼期结束时的恒定氧气流量，其持续时间由氧气流量决定，并随着氧气流量的增加而变短，从而导致饱和石灰和硅酸二钙中的炉渣，从而引燃或导向炉渣碱度至少为2.8，炉渣的最低含量为50 kg /吨生铁，并且在炉内保持最大P含量为0.04重量％粗钢和粗钢中Mn的最小含量为0.2重量％，因此在氧气吹制过程中，喷枪位置在第二吹炼阶段结束时以及随后的第三次吹炼持续时间内再次改变考虑到恒定的氧气流量，根据所需的最终碳含量和所需的金属浴最终温度来选择阶段，注意用于生产更高的钢装料中的碳含量精炼已经在第二个吹炼阶段停止了。
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