我厂修炉用的耐火材料(耐火砖粉50%,耐火土35%,粘土15 %),以及修前炉和铁水包的材料(焦粉84%,粘土16%),长期以来采用石碾或铁碾粉碎,用4．5毫米孔筛选。每次开炉前要用一个人备两天料,才能满足修炉修包的要求。现在我们遵照毛主席关于“自力更生,艰苦奋斗”的教导,自制丁字型粉碎机,提高工作效率37倍,既减轻了体力劳动,又卫生,深受工人欢迎。 Our factory repaired furnace refractories (refractory 50%, refractory 35%, clay 15%), as well as pre-furnace and ladle material (coke 84%, clay 16%), has long been used stone grind Or iron grind, screening with 4.5 mm holes. Each time you open a stove with two days of material, in order to meet the requirements of repair stove repair package. Now, in accordance with Chairman Mao’s teachings on “self-reliance and arduous struggle,” we made our own T-type grinder and raised our work efficiency by 37 times. We not only reduced manual labor but also sanitation and welcomed them by our workers.