There have been increasing efforts to utilize energy by-products （EBP） all over the world. In the Czech Re- public fly ash is usually used in ceramic technology, es- pecially in brick manufacturing and for ceramic t...There have been increasing efforts to utilize energy by-products （EBP） all over the world. In the Czech Re- public fly ash is usually used in ceramic technology, es- pecially in brick manufacturing and for ceramic tiles. The average production of EBP is about Ig million tons per year. The range of potential products, where EBP could be used, is very wide and energy by-products have become an important raw material source. In this paper the attention was focused on class C fly ash and its usage in field of refractory materials. Experimental works were carried out on mixtures with fly ash and clay. There were also tested batches for lightweight fireclay bricks. The maximal amount of CFA should be up to 50%.展开更多
The low cost and high efficient clean steels metallur- gy has been focused much attention in China. Among the factors affecting the cleanliness and consequent quali- ty of steel products, refractories are one of the k...The low cost and high efficient clean steels metallur- gy has been focused much attention in China. Among the factors affecting the cleanliness and consequent quali- ty of steel products, refractories are one of the key fac- tors. Meanwhile the restriction of resource, energy and environment is getting stronger, thus the improvement of refractories becontes much more important. In this paper, refractories selection principle Jbr clean steel production according to their thermodynamic features was ex- plained; refractories for tundLsh and flow control in con- tinuous casting, which play important roles in prohibi- ring secondary contamination of molten steel, were intro- duced. Moreover, new development of low-carbon and carbon-free refractory materials was also described.展开更多
The low-carbon magnesia-carbon （MgO-C） composites containing 3% （mass fraction, the same below） carbon were prepared by adding various types of carbon black （CB）. The mechanical properties, oxidation resistance ...The low-carbon magnesia-carbon （MgO-C） composites containing 3% （mass fraction, the same below） carbon were prepared by adding various types of carbon black （CB）. The mechanical properties, oxidation resistance at 1 100 ℃ in oxidizing atmosphere, and thermal shock resistance after 5 times dipping in 1 600 ℃molten steel of the low-carbon composite samples were investigated, compared with a commercial high-carbon MgO-C composite contai- ning carbon of 16 %. The results show that the mechanical properties, oxidation resistance and thermal shock resist- ance of the low-carbon samples are improved with the decrease of CB particle size. Thermal shock resistance of the low-carbon sample containing nanometer CB N220 is obviously better than that of other low-carbon samples, and rea- ches the level of the high-carbon samples.展开更多
文摘There have been increasing efforts to utilize energy by-products （EBP） all over the world. In the Czech Re- public fly ash is usually used in ceramic technology, es- pecially in brick manufacturing and for ceramic tiles. The average production of EBP is about Ig million tons per year. The range of potential products, where EBP could be used, is very wide and energy by-products have become an important raw material source. In this paper the attention was focused on class C fly ash and its usage in field of refractory materials. Experimental works were carried out on mixtures with fly ash and clay. There were also tested batches for lightweight fireclay bricks. The maximal amount of CFA should be up to 50%.
文摘The low cost and high efficient clean steels metallur- gy has been focused much attention in China. Among the factors affecting the cleanliness and consequent quali- ty of steel products, refractories are one of the key fac- tors. Meanwhile the restriction of resource, energy and environment is getting stronger, thus the improvement of refractories becontes much more important. In this paper, refractories selection principle Jbr clean steel production according to their thermodynamic features was ex- plained; refractories for tundLsh and flow control in con- tinuous casting, which play important roles in prohibi- ring secondary contamination of molten steel, were intro- duced. Moreover, new development of low-carbon and carbon-free refractory materials was also described.
基金Item Sponsored by National Natural Science Foundation of China(50572032)
文摘The low-carbon magnesia-carbon （MgO-C） composites containing 3% （mass fraction, the same below） carbon were prepared by adding various types of carbon black （CB）. The mechanical properties, oxidation resistance at 1 100 ℃ in oxidizing atmosphere, and thermal shock resistance after 5 times dipping in 1 600 ℃molten steel of the low-carbon composite samples were investigated, compared with a commercial high-carbon MgO-C composite contai- ning carbon of 16 %. The results show that the mechanical properties, oxidation resistance and thermal shock resist- ance of the low-carbon samples are improved with the decrease of CB particle size. Thermal shock resistance of the low-carbon sample containing nanometer CB N220 is obviously better than that of other low-carbon samples, and rea- ches the level of the high-carbon samples.
