乐山市铁厂高炉的原料整粒系统在1978年11月改造以前均系手工操作,1979年10月原料整粒系统改造完成投入生产。进厂矿石卸入受料斗,经槽式给料机均匀送入400×600顎式破碎机一次破碎,经1800×900三层振动筛分级,>25毫米的返回经250×400顎式破碎机破碎,1800×(?)0三层振动筛分级,矿石破碎形成了一个 Leshan Ironworks blast furnace raw material whole grain system in November 1978 before the transformation are hand-operated, in 1979 October raw material whole grain system transformation completed put into production. Into the factory into the hopper by the hopper, the tank feeder evenly into the 400 × 600 jaw crusher once crushed by 1800 × 900 three-tier shaker,> 25 mm back through the 250 × 400 jaw crusher Broken, 1800 × (?) 0 three-tier shaker grading, the formation of a broken ore