Relationship Between Casting Process Design And Economic Indicators And Environmental Protection

Casting process designers should always be concerned about the casting cost, energy saving and environmental protection issues. From the improvement of the casting process of the part structure, the selection of casting, modeling, the determination of the casting process scheme, the design of the casting system and the opening, to the casting cleaning method, each process is related to the above problems. For example, after the use of thermal insulation outlet for steel casting parts, the production rate of most casting process can be increased by 10%~20%, or even higher.
Special analysis shows that the process production rate of casting can not fully indicate the economic benefits of insulation outlet, should be assessed by the yield of casting. Casting yield is defined as the casting mass divided by the quality of the metal feed into the furnace, expressed as a percentage. The difference between it and the casting process is the loss of smelting and pouring. For cast steel, this loss accounts for about 6%. The yield of steel casting parts with ordinary sand type outlet is about 43
%; The yield of steel casting parts with thermal insulation outlet is about 68%. Accordingly, the profit margins are also
Increase from 5.37% to 14.16%.
It can be seen that the casting process design, the use of different processes, the metal cost, smelting metal quantity, energy consumption, casting process production rate and yield, working hour costs, casting cost and profit margin, are significant impact.
Attention should be paid to energy saving in the casting process design. For example, wet casting saves fuel consumption more often than dry casting. The use of self-hard sand type instead of ordinary dry sand type, the use of cold core box legal core, without the use of ordinary drying legal system or hot core box method, can save fuel or power consumption.
In order to protect the environment and maintain the health of workers, the process method with poison and high dust should be avoided in the casting process design, or corresponding countermeasures should be adopted to ensure safety and no pollution to the environment. For example, when the cold core box process is used, the dimethylethyamine, triethylamine, SO2 in the hardening gas should be strictly controlled, after effective absorption, purification, can be discharged into the atmosphere. For the flue gas and high dust air caused by pouring and falling sand, it should also be discharged after purification.