JPH0625347U - Forming inhibitor injection device - Google Patents

Abstract

(57) [Summary] [Purpose] With a simple structure, it has excellent heat resistance and can open the bag containing the anti-foaming agent only with the same crane operation as before. To perform work mechanically. [Structure] A hopper 12 and a rotary table 13 forming the floor thereof, and a seal plate 14 interposed therebetween.
A cut-out scraper 17 arranged in the opening 14a of the seal plate 14 so that the amount of protrusion thereof can be controlled from the outside to the inside, and a gate 16 for opening and closing the opening 14a.
The bag 15a, which is arranged at an upper position in the hopper 12 and contains the anti-foaming agent 15, is provided with a projection 18 having a sharp tip so as to be broken by its own weight. The side wall of the hopper 12 is provided with a chain 20 and a load receiving plate 21 at the lower end.
Is pivotally attached to the middle portion of the rod 19 having the counterweight 22 attached to the upper end, and the lower end is inserted into the hopper.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of an apparatus for introducing a forming inhibitor into hot metal when performing desiliconization treatment of hot metal tapped from a blast furnace.

[0002]

[Prior art]

 In the so-called desiliconization treatment for removing the silicon component in the hot metal tapped from the blast furnace, a gas is generated by the reaction between [C] in the hot metal and the silicon removal agent. This gas is taken up by the slag floating on the hot metal and foams, expanding the volume of the slag. This is called the forming phenomenon. In the torpedo desiliconization method, this reduces the amount of hot metal per torpedo vehicle that is transported from the blast furnace to the next process, which reduces transport efficiency and the basic unit of desiliconizing agent. It causes problems such as increase in temperature and decrease in hot metal temperature during transportation.

By the way, as shown in FIG. 3, the positional relationship of supplying the hot metal tapped from the blast furnace into the torpedo car is as follows: from the blast furnace main gutter 1 to the tilt gutter 2 and to the tilt gant 2 It is common to supply it into the torpedo vehicle 3 by motion. Then, a tilting trough hood 4 is provided above the tilting trough 2, and the desiliconizing agent is injected into the torpedo car 3 from the desiliconizing agent charging nozzle 5 attached through the tilting trough hood 4. In the case of this torpedo desiliconization method, conventionally, an operator has introduced an antifoaming agent from the inspection opening of the blast furnace main gutter 1 or the tilt gutter hood 4. However, since this input work is heat, heavy muscles, and dangerous work, mechanization was desired.

[0004]

[Problems to be solved by the device]

 However, there are the following two problems when mechanizing the work of introducing the anti-foaming agent. First of all, the first point is that the tilting trough hood is movable so as not to get in the way when repairing the tilting trough. Next, the second point is that if a foaming inhibitor injection device is developed, the method of loading the foaming inhibitor into the injection device involves various operations on the casting floor, so that a belt conveyor or the like must be used. If it is used, it will be an obstacle to the work, and if you try to convey the bag-formed anti-foaming agent to the hopper of the loading device using the overhead crane installed on the casting floor, the bag will be broken on the hopper. The need for a work deck and its working deck will be an obstacle to work on the cast floor as described above.

Further, the conditions required by the charging device include the ability to quantitatively cut out the anti-foaming agent, the confirmation of the stock amount in the hopper, the heat resistance, and the like. For quantitative cutting out of these, electrical control such as belt conveyor type weighing, rotation speed control such as table feeder and rotary valve is necessary, but these have a problem in heat resistance. Next, when checking the inventory quantity in the hopper, it is necessary to electrically control the load cell load cell, etc., and there is also a problem in heat resistance. Finally, as a problem of heat resistance of the entire apparatus, there is a temperature change of 0 to 100 ° C, and there is a restriction such that a precise apparatus cannot be used because the apparatus repeats thermal expansion and contraction.

An object of the present invention is to provide an anti-foaming agent charging device capable of solving all of the above-mentioned various problems.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the anti-foaming agent charging device of the present invention is provided with a hopper and a rotary table forming the floor thereof, a seal plate interposed therebetween, and an opening of the seal plate. A cut-out scraper that can control the amount of protrusion from the outside to the inside, a gate that opens and closes the opening, and a bag that is placed at an upper position in the hopper and that contains an anti-foaming agent are attached by their own weight. The rod has a protrusion with a sharp tip to break, a chain and load bearing plate at the lower end, and a counterweight at the upper end, and the middle part of the rod is pivotally attached to the side wall of the hopper so that it can swing toward the center of the hopper. The lower end is inserted into the hopper.

[0008]

[Action]

 The bag-formed anti-foaming agent, which has been transported to a position above the hopper which constitutes the anti-foaming agent feeding device of the present invention by the overhead crane, is dropped here. During the descent, the bag-forming anti-foaming agent pierces the tips of the protrusions arranged inside the hopper, tears the bag and opens it, and the opening position gradually increases due to its own weight as it descends. After that, when the hoist of the overhead crane is operated to wind the bag, the antifoaming agent inside the bag flows out from the gap between the protrusion and the opening part of the bag and falls into the hopper. Repeat the above operation several times to fill the inside of the hopper with the anti-foaming agent. At this time, the load bearing plate is pushed down by the antifoaming agent, and the counterweight located outside the hopper rises.

Next, the quantification of the cutting amount when the anti-foaming agent is added is controlled by the insertion amount of the cutting scraper into the hopper.After controlling the insertion amount, the rotary table is rotated at the required rotation speed. When the gate is rotated and the gate is opened, the antifoaming agent in the hopper is discharged from the opening of the seal plate in a predetermined amount. By discharging this anti-foaming agent, the amount of anti-foaming agent in the hopper decreases, but this decrease also causes the chains to be pulled by the flow of anti-foaming agent while the anti-foaming agent remains in the hopper to some extent. Therefore, the counterweight will not go down. Then, when the capacity in the hopper approaches the lower limit, the weight of the counterweight exceeds the pulling force, and the counterweight decreases. The worker confirms this from the outside and starts the work of supplying the anti-foaming agent.

[0010]

【Example】

 Hereinafter, the anti-foaming agent charging device of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view showing one embodiment of the schematic configuration of the device of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG.

In the drawings, reference numeral 11 is, for example, as shown by an imaginary line in FIG. 3, arranged above the tilting trough hood 4 and pouring an anti-foaming agent into the center of the tilting trough 2 to form the present invention. The anti-foaming agent, which is an inhibitor feeding device and is used in the device of the present invention, is preferably an ellipsoidal, spherical or other granular material. When the powdered material is thrown into the torpedo car at the same time as the hot metal, it scatters due to the generation of an ascending airflow due to the thermal expansion of the surrounding gas, and the amount of the anti-foaming agent added increases, whereas the granular material This is because it does not scatter even by the ascending airflow and reacts well with the hot metal.

Reference numeral 12 denotes a hopper that receives an anti-foaming agent, and an opening 12a having a required diameter is formed in the floor of the hopper, and a rotary table 13 forming a bottom is installed in the vicinity of the opening 12a. Reference numeral 14 is a seal plate which is interposed between the opening 12a and the rotary table 13 and which prevents the anti-forming agent 15 from flowing out from these gaps. The seal plate 14 is also provided with an opening 14a, and the forming preventing agent 15 is discharged from the opening 14a by opening / closing the gate 16 for opening / closing the opening 14a.

Reference numeral 17 denotes a cut-out scraper that is arranged in the opening 14a so as to project from the outside to the inside. By controlling the amount of projection of the cut-out scraper 17, it is possible to prevent forming from the opening 14a. The amount of agent 15 released is controlled to ensure quantitativeness.

Reference numeral 18 denotes a protrusion arranged in the center of the hopper 12 at an upper position, and the tip of the protrusion is sharp like a cone, for example, and a bag 15 a containing the anti-forming agent 15 is It is torn by its own weight. Numeral 19 is a rod having a lower end inside the hopper 12 and an upper end outside the hopper 12, and an intermediate portion thereof is pivotally attached to a side wall of the hopper 12 so as to be swingable toward the center of the hopper 12. A chain 20 and a load receiving plate 21 are installed at the lower end, and a counterweight 22 is installed at the upper end.

Reference numeral 13a in FIGS. 1 and 2 is a motor for rotating the rotary table 13 at a required rotation speed via the power transmission mechanism 13b, and 16a is an opening / closing device for moving the gate 16 along the seal plate 14. It is a cylinder device.

Next, the antifoaming agent 15 contained in the bag 15a carried by the overhead crane 23 is taken out from the bag 15a and supplied to the antifoaming agent charging device 11 of the present invention. The operation for discharging a predetermined amount from the above will be described.

The bag-forming anti-foaming agent 15 is conveyed to the upper direction of the hopper 12 by the overhead crane 23, and is lowered there. During the descent, the bag-forming anti-foaming agent 15 pierces the tip of the protrusion 18 disposed inside the hopper 12 and tears the bag 15a to open the bag. As it descends, it gradually increases due to its own weight.

After that, when the hoisting machine of the overhead crane 23 is operated to hoist the bag 15a, the antifoaming agent 15 inside the bag flows out from the gap between the protrusion 18 and the opening portion of the bag 15a and falls into the hopper 12. To do. The above operation is repeated several times to fill the inside of the hopper 12 with the anti-forming agent 15. At this time, the load receiving plate 21 is pushed down by the anti-forming agent 15 and, conversely, the counterweight 22 rises.

Next, the quantification of the cutout amount when the antifoaming agent 15 is charged is controlled by the projection amount of the cutout scraper 17 into the hopper 12. After controlling the projection amount, the motor 13a is driven. When the rotary table 13 is rotated at a required number of rotations and the rod of the cylinder device 16a is retracted to open the gate 16, the anti-forming agent 15 in the hopper 12 is cut out by the action of the scraper 17. A fixed amount is discharged from the opening 14a of the seal plate 14.

The discharge of the anti-forming agent 15 from the hopper 12 reduces the amount of the anti-foaming agent 15 in the hopper 12. However, due to this decrease, the amount of the anti-foaming agent 15 remains in the hopper 12 to some extent. Since the chain 20 installed at the lower end of the rod 19 is pulled by the flow when the anti-forming agent 15 is discharged, the counterweight 22 does not lower.

When the capacity in the hopper 12 approaches the lower limit, the weight of the counterweight 22 exceeds the pulling force, and the counterweight 22 is lowered. The manufacturer confirms this from the outside and starts the supplementing work of the anti-foaming agent 15 as described above.

[0022]

[Effect of device]

 As described above, since the anti-foaming agent charging device of the present invention is configured, that is, the electrically operated portion is for turning on / off the rotation of the rotary table and turning on the solenoid valve for operating the gate driving cylinder device. Since it only needs to be turned on / off, there is no need for equipment such as a load cell or rotation speed control, and it is highly reliable in terms of heat resistance and equipment costs are low. Further, since the bag opening operation can be performed only by the conventional crane operation, the work of directly engaging with the bag becomes unnecessary. Furthermore, since the forming agent injection work performed by the worker can be performed mechanically, stable forming prevention can be achieved, and the amount of pig iron received by a torpedo vehicle, the amount of desiliconization treatment, and the amount of molten pig iron that have been problems of the past have been reduced. It is possible to solve such problems as temperature drop.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing one embodiment of the schematic configuration of the device of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a drawing showing an example of a positional relationship for supplying hot metal tapped from a blast furnace into a torpedo vehicle.

[Explanation of symbols]

 11 Forming Preventing Agent Feeding Device 12 Hopper 13 Rotating Table 14 Sealing Plate 14a Opening 15 Forming Preventing Agent 15a Bag 16 Gate 17 Cutting Scraper 18 Projection 19 Rod 20 Chain 21 Load Bearing Plate 22 Counterweight

Claims (1)

[Scope of utility model registration request] 1. A hopper and a rotary table forming the floor thereof, a seal plate interposed therebetween, and an opening portion of the seal plate disposed so that the amount of protrusion can be controlled from the outside to the inside. A cut-out scraper, a gate for opening and closing the opening, a protrusion having a sharp tip for breaking the bag containing the anti-foaming agent, which is placed at an upper position in the hopper, by its own weight, and has a chain at the lower end. And a load receiving plate, the middle part of the rod with a counterweight attached to the upper end is pivotally attached to the side wall of the hopper so that it can swing toward the center of the hopper, and the lower end is inserted into the hopper. apparatus.