Patent ID: 6155765
Filing Date: 2000-12-05
Classification: F27B,F27D

Abstract:
An apparatus for precisely delivering bulk material into an open roof area of an electric arc furnace, comprising:a base having a front end proximate to the electric arc furnace and a rear end opposite said front end;a swing arm having a lower region pivotally mounted to said front end of said base and an upper region opposite said lower region;a swing cradle pivotly mounted to said upper region of said swing arm;a hopper positionable in said swing cradle;means for swinging said swing arm between a standby position and at least one charging position such that when said swing arm is moved to the at least one charging position said swing cradle and said hopper are moved bodily over the open roof area of the electric arc furnace; andmeans for tilting said swing cradle and said hopper between a loading position and an emptying position, said tilting means comprising a wire and pulley assembly comprising;a yoke formed on a bottom of said swing cradle and a support positioned on said base;a pulley extending from said swing cradle; anda static wire connecting said yoke to said support and engaging said pulley;wherein swinging said swing arm from the standby position to the at least one charging position causes said pulley to move further away from said support on said base thereby causing said swing cradle and said hopper to move toward said pulley which causes said swing cradle and said hopper to rotate sufficiently to precisely deliver material into the open roof area of the electric arc furnace;said support further comprises:a first support positioned on said base; anda second support positioned on said base opposite said first support;wherein said pulley further comprises a first pulley extending from said swing cradle and a second pulley extending from said swing cradle opposite said first pulley;wherein said static wire further comprises a first static wire connecting said yoke to said first support and engaging said first pulley and a second static wire connecting said yoke to said second support and engaging said second pulley;wherein said swinging means and said tilting means operate jointly to precisely deliver bulk material from the hopper through the open roof area of the electric arc furnace.