[DESCRIPTION] [Invention Title]

STACKER AND RECLAIMER SYSTEM AND STACKING METHOD FOR IRON AND STEEL RAW MATERIAL

[Technical Field]

<i> The present invention relates to a stacker and reclaimer system and stacking method for iron and steel raw materials, more particularly a stacker and reclaimer system and stacking method for iron and steel raw material that stacks iron and steel raw materials in a plurality of spaces longitudinally provided in a linear house and reclaims the iron and steel raw materials at the spaces.

[Background Art]

<2> Iron and steel raw materials (iron ore, various sub-raw materials for refining iron ore) which are used in a steel mill are stacked in a pile before they are carried into the steel mill and put into a blast furnace. <3> In general, iron and steel raw materials that have been transported by a ship or a vehicle is carried by a belt conveyor and stacked in piles Pl, P2 outside (yard) by a stacker, as shown in FIG. 1. The iron and steel raw materials stacked outside (yard) are reclaimed by a stacker to be carried from the piles Pl, P2 to a blast furnace in a steel mill. [Disclosure] [Technical Problem]

<4> However, in the related art, iron and steel raw materials are stacked outside, a stacker and a reclaimer are separate, and the stacked size is small, such that the pile size is small and stacking efficiency is reduced. Further, the work is affected by weather conditions, such that efficiency for maintaining the equipment is reduced and the quality of the iron and steel raw materials is decreased.

<5> Therefore, in order to overcome the problems, it is an object of the present invention to provide a stacker and reclaimer system and stacking method for iron and steel raw material that improves the quality of iron and

steel raw materials with high-efficient stacking and reclaiming, increases spatial efficiency of stacking, and makes it easy to maintain piles, by simultaneously stacking and reclaiming iron and steel raw materials in a linear house using a stacker and a reclaimer. [Technical Solution]

<6> According to a stacker and reclaimer system for iron and steel raw materials of the present invention, comprising: a wall disposed in the longitudinal direction at the center portion in a linear house! a plurality of partitions disposed at both sides of the wall to form a plurality of stacking spaces in the longitudinal direction of the wall; stacking units, disposed at the upper portion of the wall, that stack iron and steel raw materials carried by a tripper car to the plurality of stacking spaces! reclainers, disposed at both sides of the linear house, that can move in the longitudinal direction of the linear house to reclaim iron and steel materials that are stacked in piles in the stacking spaces! and discharging units, disposed under the reclaimers, that convey the iron and steel materials discharged from the reclaimers to the outside of the linear house.

<7> The stacking unit includes: a vertical support that is disposed at the upper portion of the wall and fixed to the ceiling of the linear house! horizontal supports that protrude toward the reclaimer from both sides of the vertical support! a hopper that temporarily stores the iron and steel raw materials carried by a tripper car! and a guide chute that guides the iron and steel raw materials stored in the hopper to be discharged to the stacking spaces.

<8> The reclaimer includes: moving beds that are disposed at both sides of the linear house and move longitudinally! a reclaiming conveyor that is hinged to the moving bed and pivot up/down while protruding to the wall! and a portal frame that protrudes above the wall from the moving bed such that the end slides on the upper surface of the wall.

<9> The reclaiming conveyor is adapted to pivot up/down by a wire rope that is wound/unwound by a winding unit provided to the portal frame.

<io> According to a method of stacking iron and steel raw materials of the present invention, a wall is disposed in the longitudinal direction at the center portion in a linear house and wherein a stacking unit that is equipped with a guide chute that guides to stack iron and steel raw materials carried by a tripper car to stacking spaces is disposed at the upper portion of the wall, and when the iron and steel raw materials are stacked in piles in the stacking spaces, a horizontal distance b is set to 0.14a ~ 0.26a and a stacking height H is set to 0.60a ~ 0.52a according to the horizontal distance b, wherein the horizontal distance from the end of the guide chute to the surface of the wall is b, the horizontal length of the pile-stacking cross section is a, and the stacking height is H. [Advantageous Effects]

<π> According to a stacker and reclaimer system and stacking method for iron and steel raw material of the present invention, since the iron and steel raw materials are simultaneously stacked and reclaimed by the stacking unit and the reclaimer in the linear house, it is possible to improve efficiency in stacking and reclaiming and availability of a stacking space, and easily maintain the pile. [Description of Drawings]

<i2> FIG. 1 is a perspective view showing iron and steel raw materials stacked in the related art.

<13> FIG. 2 is a view illustrating the configuration of a stacker and reclaimer system and stacking method for iron and steel raw materials according to the present invention, seen from the front of a linear house.

<14> FIG. 3 is a perspective view showing iron and steel raw materials stacked in the linear housing shown in FIG. 2.

<15> FIG. 4 is a view showing a side of FIG. 2 in detail.

<16> FIG. 5 is an elevation view of a reclaimer shown in FIG. 4, seen from the direction of arrow A.

<i7> FIG. 6 is a plan view of a reclaiming conveyor shown in FIG. 4, seen from the direction of arrow B.

<i8> FIG. 7 is a plan view of a portal frame shown in FIG. 4, seen from the direction of arrow C.

<19> FIG. 8 is a view illustrating the operation of stacking iron and steel raw materials according to the present invention. [Best Mode]

<20> Embodiments of the present invention are described hereafter with reference to the accompanying drawings.

<2i> FIG. 2 is a view illustrating the configuration of a stacker and reclaimer system and stacking method for iron and steel raw materials according to the present invention, seen from the front of a linear house and FIG. 3 is a perspective view showing iron and steel raw materials stacked in the linear housing. As shown in the figures, a wall 20 is disposed at the center portion in the linear house 10, a plurality of partitions 22 are disposed at both sides of the wall 20 to form a plurality of stacking spaces in the longitudinal direction of the wall, stacking units 30 that stack iron and steel raw materials carried by a tripper car to the stacking spaces S are disposed at the upper portion of the wall 20, reclaimers 40 that can move in the longitudinal direction of the linear house 10 to reclaim iron and steel materials that are stacked in piles P at the stacking spaces S are disposed at both sides of the linear house, and discharging units 50 that convey the iron and steel materials discharged from the reclaimers 40 to the outside of the linear house are disposed under the reclaimers 40.

<22> The linear house 10 is a general building, such as a factory with a triangular roof, and the wall 20 is a concrete wall with reinforcement steels.

<23> As shown in FIGS. 2 and 4, in the stacking unit 30, a vertical support 31 is disposed at the upper portion of the wall 20 and fixed to the ceiling of the linear house 10, fixed horizontal supports 32 protrude toward the reclaimer from both sides of the vertical support 31, a hopper 33 that temporarily stores the iron and steel raw materials carried by the tripper car (not shown) is provided at the end of the horizontal support 32, and a

guide chute 34 that guides the iron and steel raw materials stored in the hopper 33 to be discharged to the stacking spaces S is connected to the lower portion of the hopper 33.

<24> The stacking unit 30 is disposed above each of the stacking spaces S.

<25> In the reclaimers 40, moving beds 41 are disposed at both sides of the linear house 10 and can move longitudinally (in the longitudinal direction of the linear house), a reclaiming conveyor 42 is hinged to the moving bed 41 and can pivot up/down while protruding to the wall, and the portal frame 43 protrudes above the wall 20 from the moving bed 41 while the end can slide on the upper surface of the wall 20.

<26> The reclaiming conveyor 42 is adapted to pivot with respect to a hinged point at a side of the moving bed 41 by a wire rope 45 that is wound/unwound by a winding unit 44 provided to the portal frame 43.

<27> The moving bed 41, the portal frame 43, and the stacking unit 30 are provided with ladders and railings such that a worker can easily approach and work with them. Buckets (42a, shown in FIG. 6) are connected at regular intervals to the belt of the reclaiming conveyor 42 to easily carry the iron and steel raw materials. The moving bed 41 and the portal frame 43 move in the longitudinal direction of the linear house 10 using wheels 41a provided at the lower end of the moving bed 41 and the wheels 43a provided at the lower portion of the upper end of the portal frame 43.

<28> A discharging hopper 46 that loads the iron and steel raw materials to a discharging unit 50 is provided to the discharging end of the reclaiming conveyor 42.

<29> The discharging unit 50 includes an out-conveyor disposed in the longitudinal direction of the linear house 10.

<30> FIG. 5 is an elevation view of a reclaimer seen from the direction of arrow A shown in FIG. 4, FIG. 6 is a plan view of a reclaiming conveyor seen from the direction of arrow B shown in FIG. 4, and FIG. 7 is a plan view of a portal frame seen from the direction of arrow C shown in FIG. 4.

<3i> In the a stacker and reclaimer system for iron and steel raw materials

having the above configuration according to the present invention, the iron and steel raw materials temporarily stored in the hopper 33 of the stacking unit 30 by the tripper car are dropped down to the stacking space S by the chute and form the pile P.

<32> Further, when the iron and steel raw materials are reclaimed from the pile P and discharged outside the house 10, the iron and steel raw materials are put into the discharging hopper 46 by the bucket hung on the belt as the reclaiming conveyor 42 of the reclaimer 40 runs idle. Thereafter, the iron and steel raw materials are loaded to the out-conveyor of the discharging unit 50 through the discharging hopper 46 and then discharged outside the house 10 by the out-conveyor belt that runs idle in the longitudinal direction of the linear housing 10, in which the iron and steel raw materials in one pile are reclaimed by driving the winding unit 43 to pivot the reclaiming conveyor 42 up/down.

<33> Further, in order to reclaim the iron and steel raw material from the pile P at another stacking space C, reclaiming is performed by moving the moving bed 41 in the longitudinal direction of the linear house 10. As the moving bed 41 moves, the portal frame 43 and the reclaiming conveyor 42 that are connected to the moving bed 41 are simultaneously moved, in which the reclaiming conveyor 42 pivots (shown by an imaginary line in FIG. 4) such that the reclaiming conveyor 42 is not blocked by the partition 22 at the stacking space.

<34> On the other hand, when the iron and steel raw materials are stacked, the cross-sectional area A of the pile P of the iron and steel raw materials that are stacked changes in accordance to the horizontal distance from the end of the guide chute 34 to the surface of the wall 20 as shown in FIG. 8 and Table 1. Accordingly, assuming that the horizontal length of the pile- stacking cross section is a and the stacking height is H, it is preferable to set the horizontal distance b to 0.14a ~ 0.26a. Further, it is possible to maximize the efficiency of the stacking cross-sectional area A when the stacking height H is 0.60a ~ 0.52a according to the horizontal distance b.

<35> In FIG. 8, α is the angle of repose to stably stack iron ore that does not sliding down, which is fixed to 35 ^° . β is the slope angle of the floor. The horizontal length a of the pile-stacking cross section and the slope angle β of the floor are fixed values depending on the house.

<36> When the horizontal distance b is below 0.14a, the stacking height should correspondingly increase, which is not preferable in design of the house of the stacking system and construction cost. In contrast, when the horizontal distance b is over 0.26a, the stacking area A is decreased according to the angle of repose, which is not preferable.

<37> The following Table 1 shows the stacking area A, when the horizontal length a of the pile-stacking cross section is 38.4m, the angle of repose is 35 ^° , the slope angle of the floor is 10 ^° , the horizontal distance b is each 5.5m, 7.5m, 8.5m, and 10m within 0.14a ~ 0.26a, and the stacking height H is each correspondingly 23m, 21.6m, 20.9m, and 19.9m within 0.60a ~ 0.52a.

<38> [Table 1]

<39> According to the stacker and reclaimer system and stacking method for iron and steel raw materials of the present invention, since the iron and steel raw materials are stacked inside the house, it is possible to improve the quality of raw materials and stably supply the raw materials. Further, stacking by the stacking unit and reclaiming by the reclaimer are performed simultaneously, it is possible to improve efficiency in stacking and reclaiming and availability of a stacking space, and easily maintain the pile.