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日本宇治工厂对现有的压铸用铝合金熔化炉及铝合金熔化保温炉进行了以节能为重点的改造.改造工作从1990年10月立项,1992年4月完成.熔化炉改造要点:(1)将燃重油的坩埚炉改为燃城市煤气的反射炉.城市煤气(大阪煤气13A),热值45980千焦/米~3,压力1960帕.炉子熔化能力700公斤/时,保持容量2000公斤,保持温度690℃.(2)炉体材料使用了减少蓄热及散热损失的材料,在与金属液接触的部位炉衬采用氮化硅质砖,防止侵蚀及杂质混入铝液.(3)熔化炉装一个能力为125×10~4千焦/时低压煤气烧嘴,自动点火装置带12100千焦/时的值勤烧嘴.根据热电偶温度实现温度比例控制.(4)将排烟余热用于预热室预热炉料.
Japan’s Uji plant on the existing die-casting aluminum alloy melting furnace and aluminum melting holding furnace energy-saving focus of the renovation work from 1990 October project, completed in April 1992. Melting furnace transformation points: (1 ) Changed the heavy fuel oil crucible furnace to a city gas fired furnace city gas (Osaka Gas 13A), calorific value 45,980 kJ / m3, pressure 1960 Pa. Furnace melting capacity 700 kg / h, holding capacity 2000 kg , Maintaining a temperature of 690 ° C. (2) The material of the furnace body is made of materials that reduce the heat storage and heat loss, and the silicon lining of the furnace lining which is in contact with the molten metal is used to prevent erosion and impurities from mixing into the molten aluminum. Furnace equipped with a capacity of 125 × 10 ~ 4 kJ / h low-pressure gas burner, automatic ignition device with 12,100 kJ / h on duty burners. According to the temperature of the thermocouple temperature proportional control. (4) Preheat charge in preheating room.