JPH0280524A - Sintering raw material supply method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for supplying a sintering raw material for calcined agglomerate ore.

[Prior Art] The conventional art will be explained with reference to FIG. The sintering raw material supplied to the hopper 1 is charged into a pallet 4 from a rotary feeder 2, which is a quantitative cutting device. The sintering raw material charged onto the pallet 4 is advanced together with the pallet 4 in the direction of arrow A in the figure, and is kept at a constant height by the deflector plate 3 to perform sintering.

[Problem to be solved by the invention] In recent years, a new agglomerate method has been developed in which powdered sintering raw materials are granulated to produce green balls with a diameter of approximately 81 m, which are then fed to a sintering machine. has been developed, which has improved air permeability, reduction rate, product yield, etc., and is demonstrating excellent effects. In this case, there is a risk that the granular sintering raw material placed in the hopper 1 may be crushed therein. In addition, when the raw material hits the deflector plate 3 and falls onto the pallet 4, the raw material with a large particle size rolls first, and the raw material with a small particle size remains at the top, so that the sintered raw material on the pallet 4 has vertical particle size segregation. Sintered ore produced and sintered as it is may have uneven quality between the top and bottom.

The present invention has been made in view of the above circumstances, and aims to provide a raw material supply method that does not crush the sintered raw material and can yield sintered ore with uniform properties.

[Means and effects for solving the problem] The sintering raw material supply method according to the present invention includes charging granulated agglomerated ore into a pallet of a sintering machine using a belt conveyor, and When charging, the charging direction of the belt conveyor is the same as the advancing direction of the pallet.

Since the agglomerate ore, which is a granulated sintering raw material, is charged onto the pallet by a belt conveyor, the amount of raw material crushed unlike when charging by a hopper is reduced. In addition, since the loading direction of the belt conveyor is the same as the traveling direction of the pallet, the sintered raw material rolls in the opposite direction to the direction of movement when falling from the belt conveyor, so the speed of movement of the raw material decreases, and it rolls down. distance becomes smaller. Therefore, the particles are less likely to be divided into upper and lower parts depending on the size of the particles, and particle size segregation is reduced.

[Examples] Examples of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a raw material supply apparatus for carrying out the method of the present invention. A belt conveyor 12 that transfers the sintering raw material 11;
The deflector plate 13 of sintered V&10 and the sintered raw material 11 are placed below this and are connected to the arrow shown in the figure (A>
A pallet 14 is provided which is moved in the direction of.

The operation of the raw material supply device configured as above will be explained. The #l condensation raw material 11 is supplied to the belt conveyor 12 from a raw material supply device, which is not shown in this figure for the sake of clarity. The belt conveyor 12 is wide, and the sintering raw material 1
1 is transferred in the direction of the illustrated arrow (B) and is supplied to the pallet 14 of the sintering machine 10 over its entire width. Palette 1
The sintering raw material on 4 is made to have a constant layer thickness by the deflector plate 13, moves together with the pallet in the direction of arrow (A), and is sintered.

Next, the reason why the supply of the sintering raw material by the belt conveyor and the traveling direction of the belt conveyor 12 and the pallet 14 were selected as described above will be explained. Palette 1 first
As a method of feeding 4, a belt conveyor and a vibrating feeder were both compared and studied by comparing their operating conditions.

At this time, the relationship between the belt conveyor or the vibration feeder and the advancing direction of the pallet is the same as that shown in FIG. 3 for the conventional example.

The results are shown in Table 1.
is the powdered sintered raw material that adheres to the belt or vibrating feeder, and the "charging amount" is the charging status on the pallet. In addition, "coke powder flaking" refers to the degree to which coke powder attached to the surface of the granulated sintering raw material is flaked off during transportation or vibration of the sintering raw material.

Table 1 As shown in this table, the belt type is superior in most items, but it is inferior to the vibratory feeder in terms of particle size segregation. To solve this problem, we investigated the direction of movement of the sintered raw material on the belt and pallet. Zero grain size segregation means that when the granulated sintered raw material falls onto the pallet, the degree of rolling differs depending on the size of the grain. This is because it was thought to arise from The results are shown in FIGS. 2a to 2d. On the left side of this figure, the traveling directions of the pallet and belt are indicated by arrows A and B, respectively. P in the figure is a deflector plate.

Although the traveling directions A and B in FIGS. 2A and 2C are the same, the layer thickness of the sintering raw material on the belt is different.

Since the amount fed onto the pallet remains the same, this layer thickness is inversely proportional to the speed of the belt.

For comparison, FIG. 2 shows a vibration feeder in which the traveling directions A and B are the same as those in FIG. 2 a and c.

The graphs shown on the right side of FIG. 2 show the particle size distribution in the vertical direction of the sintering raw materials on the pallets corresponding to the graphs on the left side. Since the vertical and horizontal axes are the same as those shown in FIG. 2d, FIGS. 2a to 2C are omitted for the sake of clarity.

Comparing the three cases a, C, and d of the belt type shown in FIG. 2, it is understood that the case shown in FIG. 2 C is the most preferable.

[Effects of the Invention] According to the present invention, since the sintering raw material made into a ball is supplied to the pallet of the sintering machine using a belt conveyor, crushing of the sintering raw material is reduced. Furthermore, since the conveying direction of the belt conveyor is the same as the advancing direction of the pallet, vertical particle size segregation of the sintering raw material on the pallet is reduced.

10... Sintering machine, 11... Sintering raw material, 12... Belt conveyor, 13... Deflector plate, 14... Pallet.

Claims (1)

[Claims] The granulated agglomerate ore is charged to a pallet of a sintering machine by a belt conveyor, and when charging the pallet of a sintering machine, the charging direction of the belt conveyor is the same as the traveling direction of the pallet. A sintering raw material supply method characterized by the following.