JPS62199731A - Vertical type sintering machine - Google Patents

Abstract

PURPOSE:To increase the limiting air flow rate of air for sintering without decreasing the quality of a product and to improve productivity by press-feeding the raw material layer formed in a sintering machine body by a press-feeding means provided on the side wall of the above-mentioned body in the position facing said layer. CONSTITUTION:Powder sintering raw materials 5 are charged with a drum feeder 16 of a charger 2 into the sintering machine body to form a raw material layer 6. While the raw material layer 6 is moved downward, the air for sintering introduced from an air pipe 19 is passed upward from below and the raw material layer is ignited by an ignition device 7 to form a sintering zone 8. The raw materials are thus continuously sintered. A sintering completion zone 9 formed in such a manner is crushed by a crushing device 3 to obtain the sintered ore product 12. A side plate 23 is provided to the side wall 1a in the position facing the raw material layer 6 of the vertical sintering machine constituted in the above-mentioned manner and is tilted toward the inside by the operation of a cylinder 24. The raw material layer 6 is thereby press-fed downward by which the load in the vertical direction is increased and the limiting air flow rate of the air for sintering is increased. The rate of calcination is thereby increased and the productivity is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a vertical sintering machine for producing lumpy sintered ore by sintering powdered ore.

[Conventional technology] An example of the configuration of a conventional vertical sintering machine is shown in FIG.

This conventional vertical sintering machine consists of a sintering machine main body l, a charging device 2,
The main components are a crushing device 3 and a blower device 4. The sintering machine itself! The raw material layer 6 formed by filling the inside with powdered sintering raw material 5 is ignited by igniters 7, 7 to continuously sinter it. That is,
Once the raw material layer 6 is ignited, sintering using it as a fire source proceeds continuously at a position directly above the ignition device 7.7, forming a sintered zone 8 there. By crushing and taking out the sintered zone 9, which has already been sintered at the bottom of the zone 8, by the crushing device 3, the raw material layer 6 is continuously sintered while descending at a predetermined speed due to gravity. There is.

The crushing device 3 crushes the lower part of the sintered zone 9 using hammers 11, 11 that reciprocate in the left and right directions in the figure in the crushing chamber IO, and crushes the crushed product 12.
falls in the product cooling hopper 13 and is taken out by the pan conveyor 14. In addition, the charging device 2 includes a raw material hopper 1
The raw material 5 stored at 5.15 is fed into the sintering machine main body 1 by a drum feeder 16.16 in a predetermined amount in accordance with the descending speed of the raw material layer 6.

In addition, in this vertical sintering machine, the exhaust gas generated during sintering is passed through the grate 20.20 provided on the side walls 1a, Ia of the sintering machine main body l, and is passed through the suction port 17.17. The exhaust gas is sucked and discharged from the exhaust pipe 18 by an exhaust fan (not shown), and as the exhaust gas is sucked, sintering air is passed through the air pipes 19 and 19 provided at the bottom of the product cooling hopper 13. This air is introduced into the product cooling hopper I.
3, the inside of the sintering machine main body l is raised. By doing so, the taken in sintering air first cools the finished product I2, and then passes through the sintering completion zone 9 to cool this as well, and increases the temperature of the sintering air itself by recovering the heat. The high-temperature exhaust gas that has passed through the sintering zone 8 preheats the raw material layer 6 and performs heat exchange before reaching the suction port 17.17.

In addition, in order to prevent air from entering through the raw material charging port 21 at the upper part of the sintering machine main body l due to suction of exhaust gas,
The height of the raw material layer 6 is made sufficiently high, and its ventilation resistance is used to seal the material layer.

[Problems to be Solved by the Invention] By the way, the productivity of the above conventional vertical sintering machine, that is, the speed at which the raw material layer 6 is sintered, depends on the sintering speed supplied to the sintering zone 8 by the air pipes 19 and 19. It depends on the amount of condensed air blown. Therefore, the higher the wind speed, the higher the sintering speed can be. However, in this respect, the conventional vertical sintering machine has the following problems.

That is, in a state where the wind speed passing through the sintering zone 8 overcomes the load on the raw material layer 6, sintering in the countercurrent moving layer progresses steadily as shown in FIG. 5(a). However, if the wind speed increases and overcomes the load on the raw material layer 6, depending on the degree of increase, the raw material layer 6 on the sintered zone 8, particularly the particles at the corners thereof, become fluid. As the process progresses further, the sintered zone 8 and the sintered zone 9 separate, and the raw material above the sintered zone 8 no longer descends.

Such a state is shown in FIGS. 5(b) and 5(c).

In the past, air was only supplied at an upper limit wind speed that would prevent the raw material layer 6 from being in a fluidized state, and it was not possible to further improve productivity.

This invention has been made in view of the above circumstances, and an object thereof is to provide a vertical sintering machine that can improve productivity without degrading the quality of finished products.

[Means for Solving the Problems] The vertical sintering machine of the present invention moves a raw material layer made of powdery sintering raw material formed inside downward, and injects powder into the raw material layer from below. A sintering machine body that sinters while passing sintering air upward to form a sintered cake, and the sintering raw material is charged into the sintering machine body to form the raw material layer. In a vertical sintering machine equipped with a charging device and a crushing device for crushing the sintered product, a pressure feeding means for force-feeding the raw material layer downward is provided on a side wall of the sintering machine body at a position facing the raw material layer. It is characterized by the fact that it is equipped with

[Function] The vertical sintering machine of the present invention increases the critical wind speed of the sintering air and increases the firing speed by force-feeding the raw material layer on the sintering zone downward and increasing the load in the vertical direction. and improve productivity.

[Example] Examples of the present invention will be described below with reference to FIGS. 1, 2, and 3.
This will be explained with reference to the figures. Note that the same parts as those in the conventional example described above are given the same reference numerals, and the explanation thereof will be omitted.

FIG. 1 shows a first embodiment of the invention.

In the figure, reference numeral 22.22 denotes a pressure feeding means, which is provided on the side walls 1a, 1a of the sintering machine main body I facing the raw material layer 6. This pressure feeding means 22 is to force feed the raw material layer 6 downward, and in the case of this example, it includes a tiltable side plate 23,
It is constituted by a cylinder (tilting means) 24 that tilts the side plate 23.

The side plate 23 is also a part of the side wall 1a, and its lower part is pin-coupled to the side wall 1a, and the sintering machine body uses that part as a fulcrum! It can be tilted inwards. The cylinder 24 is of a hydraulic or pneumatic type, and the piston rod side is pin-coupled to the side plate 23, and the cylinder head side is fixed in place by a support mechanism such as a bottle or trunnion, so that the side plate 23 can be tilted. It is designed to rotate according to the situation.

The entire pressure feeding means 22.22 is covered by a hood 25.25, which is structured to prevent outside air from flowing into the sintering machine main body I.

The other configurations are the same as those of the conventional example described above.

Next, the effect will be explained.

When charging the raw material 5 in the raw material hopper 15 into the sintering machine main body 1 by the drum feeder 16, the cylinder 2
4, the side plate 23 is pulled outward from the sintering machine main body l, and the side plate 23 is placed in a vertical state as shown by the solid line in the figure. In this state, the side plate 23 becomes a part of the side wall 1a of the sintering machine main body 1. After charging the raw material 5 to a predetermined level in the sintering machine main body I, the side plate 23 is pressurized by the cylinder 24.
The side plate 23 is tilted into the sintering machine main body l, and the pressure applied to the side plate 23 is transmitted to the raw material layer 6. The side plate 23 is 2 in the figure.
As shown by the dotted chain line, the upper part thereof is inclined from above toward the center of the sintering machine main body l, so that the raw material layer 6 is pressurized downward. In this way, until the next time the raw material is charged,
The raw material layer 6 is constantly pressurized downward at a predetermined pressure. Therefore, the vertical load on the raw material layer 6 increases by the amount of pressure applied. Therefore, it is possible to increase the critical wind speed of the sintering air to increase the sintering speed. When the raw material layer 6 is lowered to a predetermined level, the pressure is released, the side plate 23 is placed vertically, and the raw material 5 is charged again.

Thereafter, pressurization is repeated with such an operation as one cycle.

The wind speed when the pressure is released can be lowered at the same time as the pressure is released, as shown in Figure 5 (a), or as shown in Figure 5 (b), without changing the wind speed. Even in this state, there is no problem because the charging time is short. In either case, there is no problem with the quality of the finished product compared to conventional methods.

FIGS. 2 and 3 show other configuration examples of the pressure feeding means 22. FIG.

In this example, the sintering machine main body l located opposite the raw material layer 6
The side wall 1a is equipped with upper and lower rotating drums 26 and 27 that are rotatable about horizontal axes, and a belt 28 is stretched between the upper and lower rotating drums 26 and 27, and the raw material layer 6 is Each rotating drum 2 is moved by a prime mover (driving means) 29 so as to be transported downward.
6.27 is rotated in the direction of the arrow. The rotating drums 26 and 27 are constantly pressurized inward of the sintering machine body 1 by a pressure cylinder 30 provided at the end of the shaft, and pressurize the raw material layer 6 in the same manner as in the embodiment described above. Press. Further, in this example, the entire pressure feeding means 22 is covered with a hood 31 to prevent air leakage.

Note that at least one of the upper and lower rotating drums 26 and 27 may be rotated.

[Effects of the Invention] As explained above, the vertical sintering machine of the present invention is configured to force feed the raw material layer on the sintering zone downward to increase the load in the vertical direction. It is possible to increase the critical wind velocity of the air and increase the firing speed to improve productivity.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention, FIGS. 2 and 3 are diagrams for explaining other embodiments of this invention, and FIG. 2 is a schematic diagram of the main part. The configuration diagram and FIG. 3 are perspective views of the main parts. 4 and 5 are diagrams for explaining a conventional vertical sintering machine, and FIG. 4 is a schematic configuration diagram thereof, and FIG. 5 (A)
-(c) are partial sectional views showing states when the amount of air blown increases gradually. ■...Sintering machine body, 2...Charging device, 3...Crushing device, 4...Blower device, 5... Sintering raw material, 6... Raw material layer, 8... Sintering zone, 22... Pressure feeding means, 23... Side plate, 24... Cylinder (tilting means), 26.27... Rotating drum, 28... Belt, 29... Prime mover (driving means). Applicant Ishikawajima Harima Heavy Industries Co., Ltd. Figure 1

Claims (3)

[Claims] (1) Sintering is carried out by moving the raw material layer made of powdered sintering raw material formed inside downward and passing sintering air from the bottom to the top through the raw material layer. a sintering machine body that forms a cake; a charging device that charges the sintering raw material into the sintering machine body to form the raw material layer;
A vertical sintering machine equipped with a crushing device for crushing a sintered product, characterized in that the side wall of the sintering machine body at a position facing the raw material layer is equipped with a pumping means for pumping the raw material layer downward. Vertical sintering machine. (2) The pressure feeding means includes a side plate that is provided on a side wall of the sintering machine body at a position facing the raw material layer and that can be tilted into the sintering machine body around the lower side, and a side plate that is attached to the sintering machine. The vertical sintering machine according to claim 1, further comprising a tilting means for tilting the machine into the main body. (3) The pressure feeding means includes upper and lower rotating drums that are rotatably provided on the side wall of the sintering machine body at a position facing the raw material layer, and are installed between the upper and lower rotating drums. The vertical type according to claim 1, comprising a passed belt and a driving means for rotating at least one of the upper and lower rotary drums so as to transport the raw material layer downward by the belt. Sintering machine.