在无产阶级文化大革命的推动下,我厂铸造车间广大职工,认真贯彻“鞍钢宪法”,自力更生,艰苦奋斗,大搞技术改造,于一九七○年实现了砂处理机械化,型(芯)砂、旧砂、新砂、粘土全部采用了气力输送。几年来,我们通过由实践到认识、由认识到实践这样多次的反复,初步掌握了气力送砂的规律,目前已能比较稳定可靠地应用于生产。其中旧砂吸送 Under the impetus of the Great Proletarian Cultural Revolution, a large number of staff and workers of our foundry foundry were conscientiously implemented the Anshan Iron and Steel Constitution, self-reliance, arduous struggle and major technological transformation. In 1970, mechanized sand treatment, sand (sand) , Old sand, new sand, clay all the use of pneumatic conveying. Over the past few years, we have initially grasped the law of pneumatic sand-feeding by going through practice to understanding and from realizing such repeated practice many times before that we have been able to apply it more steadily and reliably to production. The old sand sucked