JPH0278889A - Regulating device for grain size of sintered material - Google Patents

Abstract

PURPOSE:To reduce the collapse of sintered materials and obtain sintered block ores having uniform property by a method wherein the sintered materials are supplied into the pallet of a sintering machine through a conveyer while the position and/or the inclination of a regulating plate is controlled by driving it. CONSTITUTION:Sintered materials 17 are supplied from a wide conveyer 11 into the pallet 13 of a sintering machine 10 utilizing the full width of the conveyer 11. The sintered materials, supplied to the pallet 13, is regulated so as to have a given thickness by a deflective plate 12 and are moved to the direction of an arrow sign A in a diagram. The accumulated sintered material is supported by a regulating plate 15 provided at the rear part of the deflective plate 12 and the bias of grain sizes in up-and-down direction is reduced. In order to control the up and down distribution of powder fuel, the regulating plate 15 is deviated into fore-and-back direction by a driving and controlling device 16. The distribution in up-and-down direction of the powder materials mainly on the upper part thereof is controlled by the distance L of rolling down and the magnitude of inclination. A distance N between the pallet 13 and the regulating plate 15 is changed by slanting the regulating plate 15 whereby the bias of grain sizes of the materials below the regulating plate 15 may also be controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an apparatus for adjusting the particle size distribution of granulated sintering raw materials after they are charged into a sintering machine.

[Prior Art] Conventionally, as shown in FIG. 2, a normal sintering machine quantitatively cuts out sintering raw material 3 put into a surge hopper 2 from a belt conveyor 1 by a rotary feeder 4, and feeds the sintering material 3 to a deflector plate 5. One pallet per day is supplied to Toro. As the pallet 6 advances, the sintering raw material supplied here is
The deflector plate 5 moves in the direction of the arrow (A) shown in the figure, and sintering is performed when the deflector plate 5 reaches a certain height.

[Problems to be Solved by the Invention] However, in recent years, powdered sintering raw materials have been granulated into particles with a diameter of 8Il! A new agglomerate method has been developed in which a sintering raw material of around 11 is made and fed to a sintering machine, and this method has improved air permeability, reduction rate, product yield, etc., and is showing excellent effects. In this case, the sintered raw material, which has been made into a spherical shape, is crushed in the hopper 1. Although it is effective to use a belt conveyor to avoid crushing the spherical raw materials,
The problem remains that the particle size distribution of the sintering raw material in the vertical direction differs on the pallet.

In other words, the sintering raw materials that have fallen onto the pallet have a different particle size distribution in the vertical direction because those with large particle sizes roll down first and those with small particle sizes fall later.

If this difference in particle size distribution is large, sintering will not be performed uniformly between the top and bottom, and there is a risk that the quality of the sintered ore will be uneven.

This invention was made in view of the above circumstances, and aims to provide a particle size adjustment device that prevents the sintering raw material from being crushed and adjusts the vertical particle size distribution of the sintered raw material on a pallet. .

[Means and effects for solving the problem] A sintering raw material particle size adjustment device according to the present invention includes a belt conveyor for supplying granulated sintering raw materials onto a pallet of a sintering machine, and a belt conveyor for supplying granulated sintering raw materials onto a pallet of a sintering machine; a deflector plate that forms a layer of sintered raw material dropped onto the pallet at a constant height; an adjustment plate provided opposite to the deflector plate to support the sintered raw material dropped onto the pallet; and the adjustment plate. It is characterized by having a drive control device that controls the inclination angle and the vertical and longitudinal positions of the vehicle.

Since the sintering raw material is supplied to the pallet by a belt conveyor, the layer thickness is not as large as in a hopper, and the sintered raw material is not crushed into a spherical shape. Since the granular sintered ore is supplied by the belt conveyor, the distance over which the granular sintered ore rolls down is short, and the slope is gentle, so the difference in particle size distribution between the upper and lower directions is reduced. Further, depending on the operating conditions, it may be advantageous to have a slight difference in the particle size distribution, so the drive control device adjusts the inclination of the adjusting plate or the distance from the deflector plate to obtain a preferable particle size distribution. be able to.

[Examples] Examples of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a wide conveyor 11, which is the particle size adjustment device for the sintering raw material of this embodiment, and below which a deflector plate 12 and a sintering raw material 17 are placed to make the sintering raw material 17 have a constant layer thickness. A pallet 13 is provided that moves in the direction of arrow A shown. Also, deflector plate 1
Behind the plate 2 is an adjustment plate 15 that supports the sintered raw materials deposited on the pallet, and a drive control device that controls the position and inclination of the adjustment plate 15! 1.6, and a monitoring device 14 for monitoring the status of the sintering raw material.

The operation of the particle size adjusting device configured as above will be explained. The sintering raw material 17 is supplied to the wide conveyor 11 from a raw material supply device, which is not shown in this figure for the sake of clarity. From this wide conveyor 11 to the pallet 13 of the sintering machine 10,
Raw materials are supplied throughout its width. The sintering raw material supplied to the pallet 13 has a constant layer thickness by the deflector plate 12, and moves together with the pallet 13 in the direction of the illustrated arrow (A). The deposited sintered raw material is supported by the adjustment plate 15 provided behind the deflector plate 12, and the spherical sintered raw material dropped from the wide conveyor 11 has a short rolling distance (not shown). Since the slope is also made gentle, segregation of grain size in the vertical direction of the sintered raw material 17 on the pallet is reduced.

Note that it may be better to have some degree of segregation in the above particle size. For example, pulverized coal, coke powder, etc., which are powdered fuels, are attached to the surface of granular sintered raw materials to improve the quality of fired agglomerates (Japanese Patent Application Laid-open No. 61
-106728), but in this case, it is desirable that the amount of the powdered fuel is greater in the upper part of the sintered raw materials layered on the pallet than in the lower part. The reason for this is that the lower sintered raw material is in a high temperature state for a longer period of time than the upper sintered raw material, so less powdered fuel is required.

In order to control the vertical distribution of powdered fuel, the adjustment plate 15
is moved forward and backward by the drive control device 16. In this way, the vertical distribution of the powdery raw material in the upper part is mainly controlled by the distance of rolling down and the magnitude of the inclination.

Also, by tilting the adjustment plate 15, the distance between the pallet 13 and the lower end of the adjustment plate 15 (indicated by M in the figure) changes.
Grain size segregation in the lower part of the adjusting plate 15 can also be controlled. In this way, the drive control device 16 of the adjustment plate 15
By moving back and forth or tilting the pallet, grain size segregation at the top or bottom of the sintered raw material deposited on the pallet can be reduced.

In order to monitor the rolling distance or inclination or to detect the size thereof, a monitoring device 14 for monitoring the condition of the sintered raw material is installed above the sintered raw material deposited below the belt conveyor 11. It is a provision. The sensor of this monitoring device can be a television camera or an ultrasonic sensor. A television camera visually captures the deposition status of sintering raw materials, and an ultrasonic sensor is used to quantitatively determine the height.

[Effects of the Invention] According to the present invention, since the sintering raw material is supplied to the pallet of the sintering machine using a conveyor, crushing of the spherical sintering raw material is reduced. Further, since the particle size distribution of the sintering raw material on the pallet is controlled by the position or inclination of the adjustment plate by the drive control device, fired agglomerates with uniform properties can be obtained.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the particle size adjusting device according to this embodiment,
The figure is a longitudinal sectional view of a conventional sintering raw material supply device. 10...Sintering machine, 11...Wide conveyor, 12...
・Deflector plate, 13... Pallet, 14...
- Monitoring device, 15... Adjustment plate, 16... Drive control device, 17... Sintering raw material.

Claims (1)

[Claims] a belt conveyor for supplying granulated sintering raw material onto a pallet of a sintering machine; a deflector plate for forming a layer of a constant height on the sintering raw material dropped onto the pallet from the belt conveyor; and the deflector. Particle size of sintered raw material, comprising: an adjustment plate that is provided opposite to the plate and supports the sintered raw material dropped onto the pallet; and a drive control device that controls the inclination angle and the vertical and front/back positions of the adjustment plate. Adjustment device.