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过去我厂用干再生法(用风吹)进行旧砂的再生处理,效果并不好;同时灰砂飞扬,有害工人身体健康.54年以后,按部局指示和大炉型砂会决议,泥芯砂一律不回用.这样每月就有100余吨枯泥芯砂被废弃.新砂产地离厂较远,开采费和运价都很高.如果能将枯砂进行再生处理,把其中有害杂质和灰尘除去,就可以代替一部分新砂,使新砂用量由平均40%降低到20%左右.如果每年回用1600吨枯芯砂,就能节约7万多元(新砂每立方公尺开采成本加运价合20元,选分加工后,每立方公尺成本提高到50元以上,利用枯砂再生只合4元一立方).
In the past I plant with the dry regeneration method (wind blowing) for the regeneration of the old sand, the effect is not good; at the same time gray sand flying, harmful to workers’ health .After 54 years, according to the instructions of the Ministry of Industry and large furnace sand will resolution, mud core The sand will not be used again.Thus there are more than 100 tons of dry core sand per month was discarded.New sand production far away from the factory, mining costs and tariffs are high.If we can regenerate the dry sand, the harmful impurities And the removal of dust, you can replace part of the new sand, the use of new sand reduced from an average of 40% to 20%. If the annual reuse of 1,600 tons of dry sand, you can save more than 70,000 yuan (new sand per m ^ The price of 20 yuan, after the election points processing, the cost per cubic meter increased to 50 yuan or more, the use of dry sand regeneration only 4 yuan a cubic).