铸造知识（Foundry knowledge）.docVIP

铸造知识（Foundry knowledge） I have an original thesis, please refer to it. Influence of sauna weather on Cupola Melting and preventive measures Abstract: high temperature, humidity, hot weather makes cupola melting abnormal, melting rate decreased, casting porosity increased. The effect of adjusting blast rate and burden, strengthening charge management and degassing before furnace has been achieved. Keywords: high temperature; humidity; porosity; degassing; air volume The special blower cupola in Shandong province Linyi City blower factory production with high pressure, flow changes, light weight, simple structure, low power consumption, low noise characteristics, widely used in cupola blast and other compulsory occasions, well received by users. After entering the summer, many users to check the fan and reflect: compared with during the Spring Festival in cupola melting rate, melting, casting porosity increased, abnormal scrap rate increase, but not all changes (such as air, charge, operation, maintenance and blower) no problem, people remain perplexed despite much thought. Coincidentally, I plant (HTD85-21 foundry cupola blower 4t/h two rows of large spacing, cold supporting 45kW) also appears in the above problems, the melting rate decreased from 4t/h to 3t/h, the bearing box body part of the production appeared in this hole, things have never had before. 1 cause analysis 1.1 analysis of the reasons for the decrease of melting rate Effect of 1.1.1 air volume The temperature in summer is high and the volume of air expands greatly. The air density is about 10% lower than that in winter, while the coefficient of viscosity is 1.25 times that in winter. In the same amount of air in summer, the weight is about 10% less than that in winter, that is, less oxygen. At the same time, the coefficient of viscosity increases, which leads to the decrease of air velocity. Insufficient intake air will lead to insufficient combustion of bottom coke, which will lead to lower melting r