JPS5827994Y2 - ore storage tank - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an ore storage tank in which the charging head can be adjusted in order to prevent the charge from pulverizing when charging into the ore storage tank.

As is well known, ore storage tanks at steelworks are large tanks capable of storing about 200 tons of crushed and sieved ore, sintered ore, and other charges before use in the blast furnace. be.

By the way, the charge to be charged into the ore storage tank has been stored by being continuously dropped from the top opening of the ore storage tank using a conveying device such as a shuttle conveyor.

To cut out the ore from the storage tank, a desired amount of ore was cut out by operating a cutter installed at the bottom of the tank and transported to the intended use location.

However, in order to charge and drop the charge into a large-capacity ore storage tank using a conveying device, the charge must be charged at a high head, which inevitably causes the charge to become powder.

In other words, if the storage level in the tank is high, there is not much head difference, but if the storage level in the tank is low, the head difference is large, which causes not only the dropped charge, but also
The stored charges were also crushed and pulverized, and the falling materials collided with the inner surface of the ore storage tank, causing damage to the inner surface of the ore storage tank.

In order to solve this problem, this invention proposes an ore storage tank that is equipped with a mechanism that can prevent the powder from being pulverized during charging.

An embodiment of this invention will be described below based on the drawings.

As shown in FIG. 1, for example, a plurality of cylindrical bodies 1 to 5 having different diameters are successively arranged from the small diameter to the large diameter at the upper and lower ends of each cylindrical body 11 to 5. A cylindrical hopper 1 is provided which is vertically expandable and retractable by interconnecting parts, and a hoist 2 that vertically expands and contracts the cylindrical hopper 1 is connected to a pedestal 9 installed on the open top part of the outer tank 6. At the same time, a cutting gate 4 which is opened and closed by a cylinder 3 is provided at the bottom of the cylindrical hopper 1.
An inner tank 5 provided with an inner tank 5 is suspended in an outer tank 6.

That is, the inner tank 5 is suspended at the center of the upper opening of the outer tank 6, and the charge 8 from the conveying device 7 is charged into the cylindrical hopper 1. The minimum diameter cylindrical body 1. above the cylindrical body hopper 1 is mounted on a frame 9 installed in the upper opening of the cylindrical body 1.
Fix the upper end of the holder and hang it.

Furthermore, as seen from the drawing, winches as a pair of left and right hoisting machines 2 are installed on the frame 9 at positions corresponding to both sides of the inner tank 5, and the lower ends of the wires 10 from the hoisting machines 2 are connected to the cylindrical hopper. 1
It is tied to cylinder support fittings 11 protruding from both sides of the lower cylindrical body 15 with the largest diameter, and the cylindrical hopper 1 is operated vertically and retractably within the outer tank 6 by driving of the lifting device 2.

Moreover, the cutting gate 4 provided at the lower end of the cylindrical hopper 1 is
It is composed of a pair of left and right gates 4□, 4□ which are bisected from the center of the lower surface of the cylindrical hopper 1 and opened and closed to the left and right. Cylinder support fittings 11 that are pivoted and protrude from the upper part of the outer periphery.
The cylinder 3 having the piston rod 12 and the gate connector 13.13 are provided so as to be openable and closable.

The operation of the cutting gate 4 is controlled by a hydraulic equipment body (not shown) installed outside the ore storage tank so that the left and right cylinders 3 operate synchronously, and the cylinders 3 actuate to open the gate 4 □,
In the figure, the gates 4□, 4□ close when the piston rod 12 moves forward, and the gates 4□, 42 open when the piston rod 12 moves backward.

In addition, a weight 1 is attached to the outer surface of the maximum diameter cylinder at the bottom of the cylinder hopper.
7 is provided around the periphery to increase stability when the cylindrical hopper is raised and lowered and when the cutting gate is opened and closed.

Further, 14 is an outer tank level meter, 15 is an inner tank level meter, and 16 is a cutting device provided at the lower part of the outer tank.

When charging a charge such as ore into the ore storage tank of the present invention having the above-mentioned configuration, as shown by the imaginary line in FIG. Wind up the wire 10 with machine 2,
The inner tank 5 is stopped in a contracted state above the outer tank 6, and the cutting gate 4 is closed to continuously drop and charge the charge 8 from the conveying device 7 into the inner tank 5. let

Since the head difference at this time is extremely small, it has almost no effect on the powdering of the charge.

The amount of charged material gradually increases in the inner tank 5, and the increased level amount is actually measured by the inner tank level meter 15, and as the amount of charged material increases, the cylindrical hopper is The upper part of 1 is extended downwards to keep the upper storage level constant.

This is because a signal from the inner tank level meter 15 is transmitted to the raising machine 2, and the raising machine 2 is operated in accordance with the signal, and as the cylindrical hopper 1 expands, the lower part of the cylindrical hopper 1 is sequentially paid out downward. When it reaches the bottom, a signal is sent to the cylinder 3 and the piston rod 12 moves backward.
41.4□ is opened left and right, the charge 8 flows out into the outer tank 6, and the charge 8 is stored in the outer tank 6.

In this way, the charge 8 in the inner tank 5 continuously flows out into the outer tank 6 through the cutting gate 4, and as the storage level in the outer tank increases, the cylindrical hopper 1 also contracts upward. It rises gradually.

In other words, the charged material 8 is not only charged from the conveying device 7 with a head that is hardly affected by the falling impact that causes powdering, but also gradually passes through the inner tank 5 and descends into the outer tank 6. It will be charged statically.

As the storage level in the outer tank 6 increases, the storage level in the inner tank 5 increases.
The inner tank 5 gradually rises to the groove state.

Detection of this ditch tank condition is detected by the outer tank level meter 14, and the signal from the outer tank level meter 14 is transmitted to the conveying device 7 and the inner tank 5. , and the inner tank 5 closes the cutting gate 4.

Next, when the charge 8 in the tank is cut out by the cutting device 16 and the level in the tank gradually decreases, the inner tank 5 is kept at the original upper position and the amount stored in the outer tank 6 decreases. However, at the time of starting recharging into the ore storage tank, as described above, the inner tank 5 is extended after charging into the inner tank 5 one after another, so that the cutting gate 4 comes into contact with the storage level in the outer tank. At that point, the cutting gate 4 is opened again and the charge is cut out from the inner tank 5 to the outer tank 6.

As explained above, according to the present invention, regardless of the size of the amount stored in the ore storage tank, the charging head of the charge is made small so that the charge can be stored in the tank, thereby preventing the charge from pulverizing. Not only is this possible, but the inner wall surface of the ore storage tank is not subject to severe wear, and the life of the ore storage tank can be extended at the same time.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the ore storage tank of this invention. 1... Cylindrical hopper, 1□~1. ... Cylindrical body, 2 ... Winding machine, 3 ... Cylinder, 4 ... Cutting gate, 5 ... Inner tank, 6
...Outer tank, 9... Frame, 10...
...Wire.

Claims (1)

[Scope of utility model registration request] An inner tank, which has a cutting gate that can be opened and closed at the bottom of a cylindrical hopper that is a telescopic combination of a plurality of cylinders with different diameters, is inserted into an outer tank that has a cutting device at the lower end. An ore storage tank having a structure in which the upper end of the inner tank is suspended from a pedestal installed at an opening on the upper surface of the outer tank, and the lower end of the inner tank is tied to a wire of a hoist installed on the mount.