JPH0623523A - Method for scraping out slag in pouring spout in pig iron casting machine - Google Patents

Abstract

PURPOSE:To provide a scraping-out method of slag in a pouring spout in a pig iron casting machine improving working environment, in the production of a casting from molten metal of cast iron, etc. CONSTITUTION:In the method for scraping out the stuck material in the casting spout in the pig iron casting machine, moving pattern of the scraping-out member 3 decided with the shape of the casting spout and flowing of molten metal is preset. The moving pattern is reproduced with a program control. Moving course of the scraping-out member 3 is produced from position of the stuck material in the casting trough and the movement of the scraping-out member 3 is controlled. By this method, the manual work in the bad atmosphere of high temp. and much dusts near the spout is eliminated, and by the automatic scraping-out work with a robot, etc., the working environment is improved and the dangerous treating work is completely eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for scraping off slag from a pouring machine pouring gutter for producing castings from molten metal such as hot metal.

[0002]

2. Description of the Related Art A conventional cast iron machine is one in which a hot metal discharged from a blast furnace receives a predetermined amount in a mixing piggyer or a hot metal ladle, and then continuously rotates a mold forming a connecting conveyor through a gutter or the like. On the other hand, a method is used in which it is sequentially poured into a mold, cooled by water injection, blown air, or the like, and then the pig iron is dropped on a carrier such as a freight car at a falling portion. In this case, in order to make the weight of the product uniform, the mold and its connecting conveyor should be inclined so that the molten metal flows to the lower part at the same time, and at the same time, the conveyor speed and the inclination angle of the gutter etc. are adjusted to control the injection amount. ing. As described above, the conventional pig iron machine is configured to have an inclination from the injection portion to the solidification portion.

[0003] In such a mold pig iron manufacturing process, when a deposit such as a slag adheres to the pouring gutter, a uniform flow is obstructed and the supply amount to the mold fluctuates. In some cases, it is impossible to continuously produce pig iron. In order to prevent these flow fluctuations, conventionally, when it was confirmed visually that deposits such as slag had adhered to the casting hot metal pipe by visually checking the flow of the hot metal in the casting hot metal pipe, The reality is that a person holds the scraping member and carries out the scraping operation.

[0004]

As described above, since the conventional technique is to scrape out the slag, a person holds the scraping member near the trough and performs the scraping operation.
Since it is carried out by heavy-duty manual work in a bad dusty environment, there are problems in the work environment and in safety and hygiene which are dangerous.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems in a bad environment, as well as in safety and hygiene, the inventors have made diligent efforts, and as a result, work in this bad environment is manually performed. Rather, it aims to provide automatic work using a robot or the like. The gist of the invention is (1) in a device for scraping off deposits on a cast iron pipe of a pig iron machine, preset a movement pattern of a scraping member determined by the shape of the cast iron pipe and the flow of molten metal, A method for scraping off a slag from a casting iron casting gutter, characterized in that the movement pattern is reproduced by program control. (2) In a device for scraping off deposits on a cast iron pipe of a pig iron machine, a movement trajectory of the scraping member is generated from the position of the deposits on the cast pig iron pipe, and the movement of the scraping member is controlled. It is in the method of scraping out the slag of the iron machine injection gutter.

The present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic perspective view of a casting pig pouring gutter according to the present invention. As shown in FIG. 1, in a pig iron machine comprising a gutter 1 and a mold row 2, a slag scraping device 4 provided with a scraping member 3 is arranged in the vicinity of the gutter 1. In such a cast iron machine, the hot metal is poured into the gutter 5 from the topede 10,
Subsequently, the casting is manufactured by being poured into the mold row 2 from the gutter 1. FIG. 2 is an enlarged perspective view of the gutter. As shown in FIG. 2, a molten metal flow 6 is generated in the gutter 1, and the molten metal flow 6 is poured into the mold row 2 from the inflow portion 7. In such a pig iron machine having a gutter, it is difficult to produce a uniform casting due to a molten drift caused by the slag 8 as shown in FIG. That is, FIG. 3 is a sectional view showing the flow state of the molten metal in the gutter.

Therefore, as shown in FIGS. 4A and 4B, the scraping member 3 adjusts the scraping flow of the slag 8. That is, as shown in FIG. 4 (A), the slag 8 adhering to the gutter bottom 13 is scraped out in the direction of the molten metal flow 11 by the scraping member 3, and is caused to flow downstream as shown in FIG. 4 (B) by the molten metal flow. It is something to put out. FIG. 5 is a conceptual diagram showing a state of the molten metal flow in the trough. As shown in FIG. 5, the scraping member 3 follows the side wall movement pattern 9 so as to follow the gutter side wall 14, the metal flow pattern 11 along the molten metal flow 11, and the movement pattern 1 parallel to the injection part.
Two or a plurality of motion patterns thereof are conceivable, and it is necessary to determine each of these motion patterns in advance.

FIG. 6 is a view showing a state in which the movement patterns of the molten metal flowing through the gutter are distinguished. As shown in FIG. 6, seven patterns, four flowing along the side wall 14, two along the flow, and one parallel to the injection part, are determined in advance. Based on this determination, the scraping member 3 in the slag scraping device 4 is set to, for example, a long scratch on the left side wall, the central part, and the right side wall, a short scratching on the left side wall, the central part, and the right side wall, and a horizontal direction. It is divided into seven ways of scraping, and as shown in FIG. 6, the scraping member is operated by deciding one of the left side wall, the central part, and the right side wall along the gutter bottom surface of the long scratching object, In addition, as the one for short scratching, the front side of the gutter is determined to be any of the left side wall, the central portion, and the right side wall, and the scraping member is operated.

Further, in some cases, it is determined that the scraping is performed, and the scraping in the lateral direction is activated with respect to the flow of the gutter. In this way, the scraping device 3 is used in advance to determine the movement pattern such as the above-mentioned 7 patterns of the scraping member 3 by the scraping device 4 according to the shape of the casting gutter and the flow of the molten metal, and the slag is placed on the portion where the casting gutter is present. When an adhered matter such as the like adheres, it is determined by which position of the 7 patterns the adhered matter can be scraped out by operating which pattern of the 7 patterns, and the movement pattern is programmed. It is configured to be controlled and operated.

FIG. 7 is a schematic sectional view of a gutter showing another embodiment according to the present invention. As shown in FIG. 7, the movement mechanism of the scraping member is generated from the position of the deposit on the gutter by the scrap scraping device. That is, in order to determine the position of the deposit, if the symbols A, B, C in the transverse direction of the cross section of the gutter and a, b, c, d in the molten metal flow direction are attached, for example, the position and size of the deposit Is shown in a map state across three locations of Ab, Bb, and Cc. That is, an image processing operation is performed to draw the shape 15 of the adhering matter adhered to the bottom surface of the gutter on the screen, and the trajectory 16 of the movement of the scraping member for the adhering matter at this position is Ab → Bb → Cc. By instructing such a slag scraping device and activating the result, the deposits are scraped and the flow is adjusted.

In this way, the position of the deposit on the cast iron pipe is image-processed like a map, and based on the image processing, from what position the operation of the scraping member by the scrap scraping device on the track is performed. By automatically controlling the movement of the scraping member after the determination, it is possible to use the robot to implement the scrap scraping device without the need for human hands. As a result, it is possible to automatically perform work in a bad environment of high temperature, and surely perform it as extremely safe work.

[0012]

As described above, by practicing the present invention, it is possible to eliminate the conventional manual work of the front muscles in the bad environment of high temperature and dust near the gutter, and to perform the automatic scraping work by the robot or the like. The environment is improved and dangerous treatment work can be eliminated altogether, which is an extremely excellent industrial effect.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a casting pig pouring gutter according to the present invention.

FIG. 2 is an enlarged perspective view of a gutter.

FIG. 3 is a sectional view showing a flow state of molten metal in a gutter.

FIG. 4 is a diagram showing a state in which adhering substances are scraped out and flowed out in a gutter part according to the present invention.

FIG. 5 is a conceptual diagram showing the state of the molten metal flow in the gutter.

FIG. 6 is a diagram showing a state in which a movement pattern of molten metal flowing through a gutter is distinguished.

FIG. 7 is a conceptual cross-sectional view of a gutter showing another embodiment according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gutter 2 Mold line 3 Scraping member 4 Slag scraping device 5 Large gutter 6 Molten metal flow 7 Inflow part 8 Slag 9 Side wall movement pattern 10 Topeed 11 Metal flow pattern 12 Parallel movement pattern 13 Gutter bottom part 14 Gutter side wall 15 Adhesion shape Trajectory of movement of scraping member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukimasa Abe 5-3 Tokai-cho, Tokai-shi, Aichi Nippon Steel Co., Ltd. Nagoya Steel Works

Claims (2)

[Claims] 1. In a method for scraping off deposits on a cast iron pipe of a pig iron machine, a movement pattern of a scraping member determined by the shape of the cast iron pipe and the flow of molten metal is preset, and the movement pattern is controlled by a program. A method for scraping off a slag from a casting pig iron gutter, which is characterized by being reproduced. 2. A method for scraping off deposits on a cast pig iron pipe of a casting pig iron machine, wherein a movement trajectory of the scraping member is generated from the position of the deposits on the cast pig iron pipe, and the movement of the scraping member is controlled. Method for scraping off slag from casting pouring machine.