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1974年3月,包钢设计院在涟源县铁厂搞球式热风炉试验,迫切需要高铝耐火球,跑了许多省市都没有解决。于是,涟源县蓝田镇耐火材料厂勇敢地担负了试制任务。他们以阶级斗争为纲,开展路线教育,加强党的领导,组织“三结合”攻关组,不断研究,反复试验,从原料制备、成型,到烘干、烧成层层把关,革新工艺,终于保质保量地生产出高铝耐火球,正品率达95％以
In 1974 March, Baotou Steel Design Institute in Lianyuan County Ironworks engage in ball-type hot stove test, an urgent need for high-alumina refractory ball, ran a lot of provinces and cities are not resolved. Thus, Lianyuan County, Lam Tin refractory plant bravely shouldered the trial task. They take class struggle as the key link, carry out line education, strengthen the party’s leadership, and organize the “triple combination” of research groups. They keep researching and experimenting repeatedly, from raw material preparation, forming, drying, Quality and quantity to produce high-alumina refractory ball, the genuine rate of 95%