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陶质换热器具有预热空气温度高、寿命长和造价低等优点,但气密性差.漏风率高是妨碍它广泛应用的主要原因.为解决漏风问题并适当地提高空气预热温度,开展了陶质新结构换热器的研究.近三年内,经过三个阶段的试验,取得良好效果.第一阶段,空气预热温度为750～800°C,换热效率及燃料节约率分别为45～47％与44～46％;第二阶段研制成功ZLX法生产陶瓷长管,预热温度810～830°C.在总结一、二阶段试验研究的基础上设计了第二代新结构换热器并投入工业性试验.空气预热温度达850°C以上.不仅提高了换热效率且可缩短钢锭加热时间30～160min.投入试验五个月后经测定其漏风率仅为5～7％.用ZLX法生产的陶瓷长管每吨价格仅为耐热合金钢管的1/15～1/20.
Ceramic heat exchanger has the advantages of high preheating air temperature, long life and low cost, but its airtightness is poor.The high rate of air leakage is the main reason that hinders its widespread application.In order to solve the air leakage problem and appropriately increase the air preheating temperature, Carried out a new structure of ceramic heat exchanger research.The past three years, after three stages of tests, and achieved good results.In the first stage, the air preheating temperature of 750 ~ 800 ° C, the heat transfer efficiency and fuel savings rates 45 ~ 47% and 44 ~ 46%. The second stage was successfully developed ZLX production of ceramic long tube, preheat temperature of 810 ~ 830 ° C. Based on the summary of the first and second stage of the experimental study based on the design of the second generation of new structure Heat exchanger and put into industrial test.Air air preheating temperature of more than 850 ° C. Not only improves the heat transfer efficiency and can shorten the heating time of ingot 30 ~ 160min. Put into the test five months after the measured leakage rate of only 5 ~ 7%. The production of ceramic long tube with ZLX method is only 1/15 ~ 1/20 per ton of heat-resistant alloy steel pipe.