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Diving grants for metal smelters

机译:金属冶炼厂的潜水补助金

摘要

The invention relates to a process for producing an immersion nozzle for molten metal, in particular molten steel, from a starting mixture comprising alumina and boron nitride, using at least one flux, a binder and, if appropriate, further conventional additives, by making up the starting mixture with liquid, moulding, drying and, if appropriate, burning of the moulding, and to immersion nozzles produced by the process. The process according to the invention is characterised in that a) a part of the alumina employed is replaced by other additives having a lower tendency to form deposits than alumina and b) alumina having a maximum grain size of 250 mu m is used. The immersion nozzle produced by the process according to the invention has the advantage that is shows only a very slight tendency for oxidic constituents from the melt to adhere, or none at all, and nevertheless possesses an adequately high thermal shock resistance.
机译:本发明涉及一种方法,其通过使用至少一种助熔剂,粘合剂和合适的话还使用其他常规添加剂,由包含氧化铝和氮化硼的起始混合物制造用于熔融金属,特别是熔融钢的浸入式喷嘴的方法。将初始混合物与液体混合,模制,干燥,并在适当的情况下燃烧模制件,并输送至由该方法生产的浸入式喷嘴。根据本发明的方法的特征在于,a)将所用的氧化铝的一部分用具有比氧化铝更低的形成沉积趋势的其他添加剂代替,以及b)使用最大粒径为250μm的氧化铝。通过根据本发明的方法制造的浸入式喷嘴的优点在于,仅显示出熔体中的氧化成分非常轻微的粘附趋势,或者根本没有粘附趋势,并且仍然具有足够高的耐热冲击性。

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