我厂利用燃煤反射爐做灰口鑄鉄的退火处理,每一爐放鑄鉄件2500公斤。过去我們每爐燃煤350公斤,現在我們在保温时利用煤灰(因为煤灰里有未經完全燃燒的煤末可以利用)摻和新媒,每爐只要燃煤225公斤,可以节約125公斤。下表是节約用煤的統計。过去的操作方法:鑄鉄件放在爐中緩慢加热到500～560℃,保温5小 I plant the use of coal-fired furnace refractories do gray cast iron annealing, casting castings each furnace 2500 kg. In the past we fired 350 kilograms of coal per kilowatt, and now we use coal ash (because of the incomplete combustion of coal in the coal ash) to blend with the new media, saving 225 kilograms per kilowatt kg. The following table is the statistics of coal conservation. The past method of operation: casting pieces on the furnace slowly heated to 500 ~ 560 ℃, insulation 5 small