New carbon-bonded alumina filters for steel melt filtration were developed. The carbonaceous matrix was based on a new, environmental friendly binder system based on lactose and tannin. The filter preparation was analogous to the production of conventional foam filters according to the Schwartzwalder process. The processing as well as the rheology of the slurries was investigated. An addition of n-Si increased the carbon yield and the cold crushing strength (CCS) of the samples. Higher values of CCS were obtained after coating of the filters with alumina. The material was characterized by scanning electron microscopy, X-ray diffraction and Raman spectroscopy. The applicability of these new filters was assessed in impingement tests with a steel melt, in which three out of four recipes survived the thermal shock.

开发了用于钢水过滤的新型碳键氧化铝过滤器。碳质基质基于一种基于乳糖和单宁的新型环保粘合剂体系。过滤器的制备类似于根据Schwartzwalder工艺生产常规泡沫过滤器的过程。研究了浆料的加工和流变性。n的加法-Si增加了样品的碳收率和冷压强度（CCS）。在用氧化铝涂覆过滤器之后获得更高的CCS值。通过扫描电子显微镜，X射线衍射和拉曼光谱对材料进行表征。这些新过滤器的适用性在钢熔体的冲击试验中进行了评估，其中四分之三的配方在热冲击下均能幸免。