JPS61279636A - Charging apparatus of sintered ore cooling machine - Google Patents

Abstract

PURPOSE:To decrease powdering due to dropping impulsion and to improve yield, by receiving sintered ore discharged from a sintering machine with upper and lower two series chuter, and constituting the titled apparatus so that sintered ore dropped from upper chuter is received by a stone box moving in radius direction of a cooler. CONSTITUTION:A sintered ore 2 discharged from the sintering machine 1 is crushed by a crusher 3, received by two series shooters composed of an upper part chute 10 and a lower part chute 5, and charged into the cooler 6. For decreasing impulsion of sintered ore dropped from the chute 10, the stone box 4' is provided to constitute it movably in radius direction of the cooler 6 by a cylinder 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sintered ore charging device for a sintered ore cooler.

[Conventional technology]

FIG. 2 schematically shows a conventional device for charging high-temperature sintered ore into a sintered ore cooler (hereinafter referred to as cooler).

The sintered ore 2 discharged from the sintering machine 1 passes through a chute 12 and is crushed by a crusher 3 in large chunks, and is then transferred to a stone box 4 (to prevent the sintered ore from pulverizing when it falls). The sintered ore is filled with sintered ore to form a cushion. Most of the sintered ore is fed through the chute 12, but some of the sintered ore is fed through the chute 12.
In position 2, the sintered ore is not discharged from the sintering machine but is supplied as sintered ore □f directly through the shooter 5, so two series of chutes are required in any case.
The sintered ore discharged at the position 2.2' has a longer falling distance and is less likely to be broken and powdered by impact and time when falling, which is a factor in reducing the yield of sintered ore. was.

The cooler 26 shown in FIG. 2 cools the sintered ore by blowing cooling gas 7 (generally air) into it, and
This is an example of an exhaust heat recovery type □ cooler in which the high temperature gas □ gas 8 obtained by the above is recovered in the recovery gas duct 9, but the above situation is exactly the same for a cooler that does not recover exhaust heat. [Problems to be Solved by the Invention] However, in the prior art, the following □
There were some drawbacks.

(1) In the above-mentioned Figure 2, most of the sintered ore is supplied to the cooler via the chute 12, but since the falling distance of the sintered ore becomes large, the sintered ore is damaged by the impact when it falls. The proportion of sintered ore that is destroyed and has a particle size smaller than a predetermined size increases, and the yield decreases.

(2) It is not possible to control the position of the sintered ore falling into the cooler, and as a result, the shape of the pile of sintered ore in the cooler is generally high in the center and low at both ends, as shown in Figure 3. Therefore, Hl is smaller than the passage distance H1 of the cooling gas, and since the size of particles near both side walls is larger than the size of particles near the center of the hopper, the filling ratio near the walls is reduced. becomes small (apparent B becomes even smaller)', and part of the cooling gas escapes to the upper part where the pressure drop is small, resulting in a decrease in cooling efficiency of the sintered ore and a decrease in heat recovery efficiency.

The present invention aims to provide a charging device for a sintered ore cooler that eliminates the above-mentioned drawbacks of the prior art.

Means for Solving Problem C] That is, the present invention provides a charging device for a sintered ore cooler, in which the sintered ore separated from the sintering machine is transferred to the upper and lower shooters.
l) A sintering device characterized in that two series of chutes are used to supply the sinter to the cooler, and a stone box movable in the radial direction of the cooler is installed on the trajectory of the sinter falling from the upper chute. This is a charging device for a condensate cooler.

〔composition〕

A schematic diagram of an embodiment of the present invention is shown in Figure 1.0 □ In Figure 1, the same parts as Figure 2 are shown in Figure 2.
The same reference numerals are given.
: Characteristic parts in Figure 1 are other than shooter 5 □
The new shooter 0 has been installed in , and the shooter □
In addition to the stone box 4, a stone box 4' was installed in order to weaken the impact of the sintered ore that fell from the cooler 0, and the stone box 4' was installed for the purpose of controlling the shape of the pile of sintered ore in the cooler. (2) The mechanism is such that it can be moved in the radial direction of the cooler using a driving means such as a cylinder.

[Effect]

By installing the chute 10, the falling distance of the sintered ore (the falling distance from the stone box 4 to the chute 5 in Fig. 2) becomes smaller, and the sintered ore is destroyed (pulverized) due to the impact of the fall.
is reduced, thereby improving the yield of sintered ore.In addition, by installing a movable stone box 4', the shape of the pile of sintered ore in the shaker can be controlled as shown in Fig. 4, for example. Therefore, the cooling efficiency of the sintered ore is improved and the amount of recovered heat is also increased.An outline of an embodiment of the present invention is shown in FIG. In addition, the particle size distribution of sintered ore after treatment when the present invention is applied to an exhaust heat recovery type cooler that processes sintered ore at a rate of 700 tons/'h is shown in Figure 5 in comparison with the conventional method. Table 1 shows the heat recovery results at 0 [Effects of the Invention] As described in the Examples section. When returning sintered ore with a grain size of 6vna or less, the yield of the conventional method is 90% as shown in Figure 5.
%, whereas in the present invention, the yield is 95q6, which is 5
Also, as shown in Table 1, the amount of recovered heat is approximately 18%.
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[Brief explanation of the drawing]

Fig. 1 is a schematic diagram illustrating an embodiment of the present invention, Fig. 2 is a schematic diagram illustrating a charging device for a conventional sintered ore cooler, and Fig. 3 is a schematic diagram illustrating a charging device for a conventional sintered ore cooler.
4 and 4 are schematic diagrams of an example of the shape of sintered ridges in the cooler in the conventional method and the present invention, respectively, and FIG. 5 is a schematic diagram of the sintered ore after cooling in the conventional method and the present invention. This is a chart showing an example of the measurement results of particle size distribution.

Claims (1)

[Claims] In the charging device of the sintered ore cooler, two series of chutes are used to supply the sintered ore separated from the sintering machine to the cooler from the upper and lower chutes, and the sintered ore that falls from the upper chute is used. A charging device for a sintered ore cooler, characterized in that a stone box movable in the radial direction of the cooler is installed on the trajectory of the condensate.