JPH11278679A - Delivering method by reclaimer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To deliver a brand raw material from a raw material heap which is covered by different brand materials with the mixing of different brand material regulated by moving the scrape-up position of a boom tip to a position separated a specified interval from the boarder face between both brand materials of the raw material heap. SOLUTION: In order to proceed delivering operation of G2 brand raw materials from right side to left side, first of all, with the scrape-up wheel 28 at the tip of a boom 26 held at a position higher a specified interval L1 m above the tread S of a brand boarder face F, delivering operation processed. When the delivering operation to this side of a specified interval L2 m from the rise U of the boarder face F finished, the delivering operation on the step finishes. For the delivering operation on the step next to the previous step, with the scrape-up wheel 28 at the tip of a boom 26 held at a position higher a specified interval L1 m above the tread S of a brand boarder face F, delivering operation is processed to this side of a specified interval L2 m. Delivering operation is performed in the same manner in the following steps. Since the delivering operation for G2 brand raw materials is thus stopped to this side of the brand boarder face F against the proceed direction, the mixing of brand G1 raw materials into the brand G2 raw materials are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of discharging raw materials such as iron ore from a raw material mountain by a reclaimer in a raw material yard such as a steel mill.

[0002]

2. Description of the Related Art In a raw material yard such as a steel mill, typically, granular raw materials unloaded from a transport ship at a sea berth are received, and their types (ore, coal, etc.) and brands (places of origin, etc.) are received.
Are piled up as separate piles of raw materials so as not to be mixed, and are paid out to a post-process such as a sintering machine and a blast furnace according to the operation schedule. For this purpose, a work of stacking material piles by a stacker (stacker) and paying out raw materials from the material piles by a dispenser (reclaimer) is performed. Therefore, for example, even if a transport ship arrives, if there is no storage area for raw materials, the ship is made to wait, and a penalty according to the waiting time must be paid, which is one of the major factors that raises the manufacturing cost.

[0003] Therefore, it is extremely important to improve the operation efficiency of the raw material yard in order to improve the productivity of the steelworks as a whole or to reduce the production cost. One of the basic factors is the extent to which a certain yard area is increased. It should be used effectively. Generally, raw materials of different brands are stacked as separate piles in the raw material yard in order to avoid mixing, and there is a specified gap between the raw material piles to prevent mixing of different brands and secure the working space of the loading machine and dispensing machine. Due to the gap, the loss was not negligible in terms of yard space utilization efficiency.

[0004] Therefore, if one brand of raw material can be piled with another brand on top of another brand of raw material, and two brands can be used as one raw material pile, the yard area utilization efficiency can be considerably improved. For this purpose, it is necessary to manage the interface between different brands in the raw material mine and control mixing between brands at the time of dispensing. Conventionally, the management of the raw material hills on the raw material yard has been a two-dimensional management in which the existence range of the bottom surface of the raw material hills is managed by several representative points on the bottom contour line. In this case, it is not possible to manage the boundary between issues when different kinds of issues are overlaid,
Unable to stack different brands.

Therefore, in recent years, it has been considered to adopt three-dimensional management instead of the conventional two-dimensional management, because it is necessary to improve the management accuracy in order to improve the operation efficiency of the raw material yard. Its main purpose is to load and dispose of different brands of raw material in a fixed area yard at a higher density. Specifically, the existence range of the raw material mountain and the existence range of each brand region in the raw material mountain are grasped and managed in a three-dimensional coordinate space. This makes it possible to manage the boundary between the brands, and achieve the over-stacking of different brands.

However, in a raw material yard controlled in three-dimensional coordinates as described above, a special method is required for controlling the mixing between brands when dispensing from a raw material pile that is overlaid with different brands and integrated. become.

[0007]

DISCLOSURE OF THE INVENTION The present invention provides a method of controlling the mixing of brands from a pile of raw materials overlaid with different brands in a three-dimensionally controlled raw material yard and dispensing them with a reclaimer. The purpose is to:

[0008]

According to the present invention, there is provided, in accordance with the present invention, a method of dispensing material hills in a material yard by means of a reclaimer having a boom that can be raised and turned. The first who paid out
When dispensing from the integrated new raw material pile by stacking the second brand in the form of overlying the stepped dispensing end face of the raw material pile of the brand, the scraping position of the boom tip is set to both sides of the new raw material pile. A payout method by a reclaimer is provided in which payout is performed by moving the product at a predetermined interval from a boundary surface between brands.

According to another aspect of the present invention, there is provided a method for dispensing material piles using a reclaimer having a boom that swings up and down in a material yard controlled in three-dimensional coordinates. When dispensing from the integrated new raw material pile by stacking the second brand in the form of overlying the stepped dispensing end face of the raw material pile of the first brand that has been paid out halfway, both brands in the new raw material pile A payout method by a reclaimer is also provided, wherein payout is performed by moving a scraping position of a boom tip at a predetermined distance from the boundary surface based on three-dimensional coordinate information representing a boundary surface between them. .

[0010]

DETAILED DESCRIPTION OF THE INVENTION The method of the present invention typically comprises
Either of the embodiments (A) and (B) is adopted. (A) Move the scraping position of the tip of the boom at a predetermined interval above the tread of the above-mentioned boundary surface and before the kick-up (stepping-in) of the step-like bench composed of the step-like payout end surface. Let it.

[0011] (B) The scraping position of the tip of the boom is moved downward by a predetermined distance from the tread surface of the above-mentioned boundary surface of the bench constituted by the stepped dispensing end surface and away from the kick-up by a predetermined distance. Hereinafter, the embodiment of the present invention will be described more specifically. First, FIGS. 1A and 1B show an example of the operation of a material stacker (stacker) and a dispenser (reclaimer).

The basic structure of the stacker 10 comprises a traveling section 14 for traveling on a track 12 laid along a raw material yard, and an arm (boom) 16 extending from the traveling section 14. The raw material conveyed in the above is dropped on the raw material yard from the tip of the boom 16 and stacked to form a raw material pile R. Although not shown, the stacker 10 is equipped with a traveling position detecting device and a stacking height detecting device.

The basic structure of the reclaimer 20 comprises a traveling section 24 for traveling on a track 22 laid along a raw material yard, and an arm (boom) 26 extending from the traveling section 24. The scraper 28 pays out the material by scraping the material from the material pile R with the scraper 28, and transports the material to a subsequent process by a belt conveyor (not shown). The scraping device 28 is, for example, a rotating foil having scraping claws arranged along the outer circumference.

In a normal dispensing procedure, first, a rotating wheel 28 is arranged at the uppermost stage of the raw material pile R, and the boom 26 is horizontally swung to pay out one stage over the entire width of the raw material pile R. Then, FIG. ) Payout in the order of the second stage, the third stage,. As a result, the payout end face becomes stepped as shown in the figure. Although not shown, the reclaimer 20 is equipped with a traveling position detecting device, a lowering angle detecting device of the boom 26, and a turning angle detecting device of the boom 26.

Referring to FIGS. 2 (1), (2) and (3), the processing procedure of (1) stowage, (2) payout, and (3) overlay stowage will be described. In the stacking operation shown in FIG. 2A, a traveling stacker (stacker) 10 as shown in FIG.
The raw material grains are stacked on the raw material yard from the end of the boom 16 and one conical first region R1 and the overlaid regions R2 to Rn are sequentially formed to stack one raw material pile R. Then, the three-dimensional existence range of the raw material mountain R is managed.

In the payout operation shown in FIG.
The raw material pile R is formed by a rotating wheel 28 at the tip of a boom 26 of a traveling dispenser (reclaimer) 20 as shown in FIG.
Scraping the raw material from one end of the container and dispensing the raw material. Then, the three-dimensional existence range of the raw material mountain R after dispensing is managed. 2 (3) is basically the same as the operation of stacking the second and subsequent areas of the stacking operation of FIG. 2 (1). The second stock is stacked to form a new raw material pile R '. Then, the three-dimensional coordinates of the boundary face F (the end face F) between the first brand and the second brand in the new raw material mountain R 'are managed.

FIG. 3 shows the structure of the new raw material mountain R 'in (A) plan view and (B) side view. The second brand G2 is stacked so as to cover the stepped payout end face F of the first brand G1 that has been paid halfway, and an integrated new raw material pile R 'is formed. From the new raw material mountain R 'composed of these two brands G1 and G2, for example, the brand G2 is paid out. At this time, if the brand switching range is scraped along the boundary F, there is no mixing between brands. Or it should be minimal.

However, in practice, it is unavoidable that collapse occurs during scraping, so that scraping along the boundary surface F cannot reduce or minimize the contamination. Further, it is practically impossible to control the degree of mixing due to collapse. The present invention controls the contamination by artificially causing the contamination based on the reality that the contamination cannot be reduced to zero.

As means for this, the scraping position of the tip of the boom is displaced by a predetermined distance from the boundary surface and paid out based on the three-dimensional coordinate information representing the boundary surface F between the two brands in the new raw material mountain R '. I do. Typically, the boom tip is moved as shown in FIG. 4 or FIG. FIG. 4 shows a case where the payout of the brand G2 proceeds from right to left as a specific example of the embodiment (A) described above.

First, as shown in FIG. 4A, the dispensing proceeds while the scraping wheel 28 at the tip of the boom 26 is maintained at a height above the tread surface S of the brand boundary surface F at a predetermined distance L1. Then, as shown in FIG. 4 (2), when the payout is completed up to a predetermined distance L2 from the kick-up U of the boundary surface F, the payout at that stage is finished. Next, as shown in FIG. 4 (2), the payout is advanced for the lower step, also at a height above the tread surface S at a predetermined distance L1, and a predetermined distance L2 before the kick-up U of the boundary surface F. Pay out until. Hereinafter, FIG. 4 (2)
As shown in (1), payout is made by sequentially shifting to the lower stage.

In the embodiment shown in FIG. 4, since the payout of the brand G2 is stopped before the brand boundary F in the direction of travel, the brand G1 does not mix with the brand G2. FIG. 5 shows a specific example of the embodiment (B) in which the payout of the brand G2 proceeds from right to left as in the example of FIG. First, as shown in FIG.
Is maintained at a height lower than the tread surface S of the brand boundary surface F by a predetermined distance L1, and the payout proceeds.

Then, as shown in FIG. 5 (2), when the payout is advanced from the kick-up U of the boundary surface F by a predetermined distance L2 to the depth, the payout at that stage is finished. Next, as shown in FIG. 5 (2), the payout of the lower step is continued at a predetermined distance L1 below the tread surface S, and the payout is advanced. Pay out to the back. Thereafter, as shown in FIG. 5 (2), the payout proceeds to the lower stage.

In the embodiment shown in FIG. 5, the payout of the brand G2 is made deeper than the brand boundary surface F, that is, the brand G in the traveling direction.
Since the process is performed up to the position where the product 1 has been entered, the remaining raw material pile is composed only of the brand G1, so that the mixing of G2 into the brand G1 does not occur. As described above, in any of the embodiments of FIGS. 4 and 5, the occurrence of mixing does not occur in both the payout lots of the brands G1 and G2, and is limited to only one of the payout lots. Therefore, it is not necessary to deal with the contamination for both payout lots, but only for one payout lot. This is a great advantage in practical operation.

The distance L1 between the scraping position and the tread of the step-like boundary surface and the distance L2 between the rise and the rise are determined by the length of the tread at the time of dispensing (bench length, that is, the depth of the flat portion of the step formed by dispensing). ), Raw material brand, moisture, wheel rotation speed, etc., but can be arbitrarily selected within the bench length. However, note the following points. The components and properties of brand G1 and brand G2 are compared, and the subsequent processes (coke, sintering,
(Blast furnaces, etc.) are mixed with brands that have a low impact on brands that have a strong impact on the blast furnace. For example, when the brand G1 has a stronger influence on the operation than the brand G2, the payout is stopped just before the boundary as shown in FIG. Thereby, when the brand G2 is mixed into the brand G1 in the later payout, the influence on the operation can be suppressed to a small value. Conversely, when G2 is more influential than G1, payout is performed to a position beyond the boundary surface as shown in FIG. With this payout, the brand G1 is mixed into the brand G2, but the influence on the operation can be suppressed to be small.

The payout according to the present invention can be specifically performed by a control system as shown in FIG. 6, for example.
The system shown is a three-dimensional management system, machine side (inside the reclaimer (RC)) system, process control (process computer)
System, an OP-CRT (operator screen display) system, and a sequencer system (PC1500). Thus, the payout along the brand boundary according to the present invention is:
It is preferable to apply to a raw material yard managed three-dimensionally.

The three-dimensional management method or three-dimensional coordinate information to which the present invention is applied is not particularly limited, and includes various methods. Typically, the space on the raw material yard may be divided by a large number of small cubes, and coordinates may be managed in units of each cube, or the y-axis may be divided by a large number of zx planes (raw material yard length, width, height). Coordinate axes in the vertical direction: x-axis, y
Axis, z-axis), and the contours of the peaks in each z-x plane may be coordinate-managed in the form of being stacked in the y-axis direction, or proposed by the present applicant in Japanese Patent Application No. 10-0755598. Like y
Divide the z-plane into a number of meshes, and use the x-coordinates (From X1 To X2) of the two points where a straight line along the x-axis passes through the representative points of each mesh and intersects the outer shape of the mountain to obtain the tertiary range of the mountain A method of managing the original may be applied.

As described above, when the second brand is piled up so as to cover the stepped dispensing end face of the raw material pile of the first brand which has been paid out halfway, the payout is performed from the integrated new raw material pile. Based on the three-dimensional coordinate information representing the boundary between the two brands in the new raw material pile, the scraping position of the boom tip is moved away from the above-mentioned boundary by a predetermined distance, and the dispensing is performed. Can be limited to one of the first issue and the second issue.

[0028]

As described above, according to the present invention,
In the raw material yard, it is possible to control the mixing of different brands at the time of dispensing so that only one brand can be mixed, so that different raw brands can be overlaid and stacked to form an integrated raw material pile. It can be used at a high density to improve operational efficiency.

[Brief description of the drawings]

FIGS. 1A and 1B are front views showing examples of the basic structure and operation of (A) a stacking machine (stacker) and (B) a dispensing machine (reclaimer).

FIGS. 2 (1) to 2 (3) are cross-sectional views showing operations of (1) stacking, (2) payout, and (3) top-stacking.

3 (A) and 3 (B) show a new integrated raw material pile formed by stacking raw materials of different brands on raw material piles paid out halfway, and a boundary surface between brands inside the raw material pile. It is the (A) top view and the (B) side view shown.

FIG. 4 is a cross-sectional view showing a mode in which the scraping position of the tip of the boom is moved so that the payout is terminated a predetermined distance before the boundary between brands according to the present invention.

FIG. 5 is a cross-sectional view showing a mode in which the scraping position of the end of the boom is moved so that the dispensing is completed when the dispensing is performed at a predetermined interval from the boundary between brands according to the present invention.

FIG. 6 is a block diagram illustrating a control system for performing payout by a reclaimer in a three-dimensionally controlled raw material yard according to the present invention.

[Description of Signs] 20 ... Reclaimer (dispensing machine) 22 ... Reclaimer traveling track 24 ... Reclaimer traveling part 26 ... Reclaimer arm (boom) 28 ... Scrape device (scrape foil) at the end of the boom

Continuing on the front page (72) Inventor Kenji Tanaka 1 Nishinosu, Oita, Oita City, Oita Prefecture Nippon Steel Corporation Oita Works

Claims (4)

[Claims] 1. A method for dispensing material piles in a raw material yard using a reclaimer having a boom that swings up and down, wherein a stepped dispensing end surface of a first brand material pile that has been dispensed partway is covered. When the second brand is stacked and paid out from the integrated new raw material pile, the scraping position at the end of the boom is moved at a predetermined distance from the boundary surface between the two brands in the new raw material pile. A payout method by a reclaimer, wherein the payout is performed by a reclaimer. 2. In a raw material yard controlled in three-dimensional coordinates,
In a method of dispensing material piles using a reclaimer having a boom that revolves and raises, a second brand is stacked in such a manner as to cover a stepped dispensing end face of a raw material pile of a first brand that has been partially dispensed. When paying out from the integrated new raw material mine, based on the three-dimensional coordinate information representing the boundary surface between both brands in the new raw material mine,
A dispensing method using a reclaimer, wherein the dispensing is performed by moving a scraping position of a boom tip away from the boundary surface by a predetermined distance. 3. The method according to claim 1, wherein
A reclaimer characterized in that the scraping position of the tip of the boom is moved at a predetermined interval above the stepped tread of the boundary surface formed by the stepped dispensing end surface and at a predetermined interval before the kick-up, and the reclaimer is characterized in that Payment method. 4. The method according to claim 1, wherein
A reclaimer characterized by moving the scraping position of the tip of the boom downward at a predetermined interval below the stepped tread surface of the boundary surface formed by the stepped dispensing end surface and at a predetermined distance behind the kick-up. Payment method.