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一、前言在陕西延河水泥机械厂平均装容5吨(变压器容量为2700KVA)的碱性炼钢电弧炉上进行了单渣法冶炼碳素铸钢(ZG35、ZG45)的生产试验(21炉),嗣后进行了试生产。结果表明,在电炉上采用单渣工艺冶炼中碳铸钢,工艺稳定,钢的质量能够满足相应技术条件要求。与双渣工艺相比,它具有很好的技术经济效果和社会效益。单渣工艺的要点是:提高装料时垫炉底石灰的比例(≥3％),熔化末期和氧化前期,注意流渣、补渣操作,控制[P]为0.025％以下,提高前期硫的渣-钢分配比;氧化后期,规定炉渣高碱度和良好流动性、熔池高温度和良好的沸腾,在确保完成钢的各项精炼任务的同时,使[S]≤0.05％,出钢前要求较小渣量(≤4％)、较高碱度(≥2.5),炉内加锰搅拌熔池后5分钟内出钢;
I. Preface The production test (ZG35, ZG45) of single-slag smelting carbon steel (ZG35) was carried out on an alkaline steel-making electric arc furnace with an average capacity of 5 tons in Shaanxi Yanhe Cement Machinery Factory (transformer capacity 2700KVA) ), Followed by trial production. The results show that the use of single slag slag smelting process in the cast steel, process stability, the quality of steel to meet the requirements of the corresponding technical conditions. Compared with the double slag process, it has a very good technical and economic results and social benefits. The main points of the single slag process are as follows: increase the proportion of lime (= 3%) at the bottom of the mat during charging, pay attention to the slag flow and slagging operation at the end of melting and the oxidation, control the [P] below 0.025% Slag - steel distribution ratio; late oxidation, the provisions of the slag high alkalinity and good fluidity, the pool temperature and good boiling, to ensure that the completion of the refining tasks of steel at the same time, so that [S] ≤ 0.05% tapping Before the request of a smaller amount of slag (≤ 4%), higher alkalinity (≥ 2.5), the furnace within 5 minutes after adding molten manganese stir the molten steel;