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我厂是1966年由山东济南内迁到贵州都匀来的一个新厂,主要生产龙门刨床和龙门铣床。这两种产品铸铁件的基本特点是一个“大”字,多数大件需要二个或三个铁水包同时浇铸,要求铸铁牌号有 HT10—26;HT15—33;HT20—40。其中 HT20—40占80%。熔炼设备配有两座冲天炉,其中5T/时和10T/时各一座。这两座冲天于炉1971年4月和10月先后投产,几年来生产上述牌号铸铁件共二万四千多吨。结束了产品铸铁件毛坯由济南第二机床厂供应的被动局面。但这两座冲天炉主要技术经济指标是比较落后的。1975年10月,我们参加了一机行业在沈阳召开的改造冲天炉、提高铁水质量、节约焦炭
I plant in 1966 from Jinan, Shandong Province moved to Guizhou Duyun to a new plant, the main production planer and gantry milling machine. The basic characteristics of these two products cast iron pieces is a “big” character, most large pieces require two or three ladle at the same time casting, requiring cast iron grades HT10-26; HT15-33; HT20-40. Which HT20-40 accounted for 80%. Melting equipment is equipped with two cupola, of which 5T / hour and 10T / hour each one. These two sky in the furnace in April and October 1971 has put into production in recent years to produce the above grade cast iron pieces a total of more than 24,000 tons. The end of the product cast iron blank from Jinan Machine Tool Plant supply passive situation. However, the two main technical and economic indicators Cupola is relatively backward. October 1975, we participated in a machine industry in Shenyang transformation of the cupola, improve the quality of hot metal, save coke