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阿穆尔钢厂为了降低连铸坯整体和表面增碳以及改善(载面200×1250-1500毫米)在槽式垂直浇铸结晶器里铸成的钢坯质量,曾采用含云母(20-45％),硅钙硼石(Ca(B·OH)SiO_4)(20—45％)和水泥(17—45%)组成的绝热剂取代石墨的试验。在每组绝热剂中(见表1),调整其碱度,熔体浓度,填充料和石墨量(6—30％)来变动其性能。在1~#绝热剂下浇铸的铸坯获得令人满意的表面质量,因为1~#绝热剂在结晶器中形成含氧化物高低碱性渣,渣中含氟量、碱性氧化物和氧化铁含量高,保证了钢水正常流动,使渣与钢水容易分离,以及有利于非金属夹杂物的分解。但是使用该剂时,氟化物的排除难;剂中
In order to reduce the overall and surface carbon addition of the slab and to improve the quality of the billet cast in the trough vertical casting mold (loading surface 200 × 1250-1500 mm), the Amur steel mill used mica (20-45%), An experiment was conducted in which graphite was replaced by an insulating agent consisting of calcium silicate borosilicate (Ca (B · OH) SiO 4) (20-45%) and cement (17-45%). In each set of insulation (see Table 1), adjust its alkalinity, melt concentration, filler and graphite content (6-30%) to change its performance. Billets cast at 1 to # adiabatic agents achieve satisfactory surface quality because 1 to # adiabatic agents form high and low alkalis containing oxides in the crystallizer with fluorine content in the slag, basic oxides, and oxidation High iron content, to ensure the normal flow of molten steel, slag and molten steel easy separation, and is conducive to the decomposition of non-metallic inclusions. However, the use of the agent, the fluoride removal difficult; agent