JPS60149707A - Method for charging raw material to blast furnace - Google Patents

Abstract

PURPOSE:To deposit ores and coke of a raw material in a thoroughly mixed state in a blast furnace by providing a dash-board at the top end of a chute swiveling below a vertical concentrating chute, bringing the downward gliding raw materials into collision against the dash-board and mixing the materials. CONSTITUTION:Flow rate adjusting gate valves 5 of hoppers 1, 3 are opened to admit simultaneously large-lumped coke and ores through an inclined chute 6 into a vertical concentrating chute 7. A swiveling chute 8 is glided downward to bring the raw materials into collision against a dash-board 9, thus mixing the materials and charging both materials through the same falling locus into a furnace 14. The large lumped raw materials are charged into the central part 15 of the furnace inside by adjusting the luffing angle of the chute 8. The small- lumped coke and ores are then dropped from hoppers 2, 4 into the furnace 14 by the similar operation and are charged to the peripheral part 16 of the furnace inside by adjusting the luffing angle of the chute 8. The feeding out of the large- lumped raw materials and the small-lumped raw materials is thus alternately accomplished. The raw materials are effectively mixed in the dropping route and are deposited in a thoroughly mixed state in the blast furnace 14 by the above- mentioned method.

Description

[Detailed description of the invention] No? Field of the Invention The present invention relates to an improvement in the method of charging raw materials into an open furnace, and in particular, uses a rotating chute type raw material charging device a to charge ores and coke, which are raw materials for a blast furnace, into a high tacho. "Complete 7" is also related to a method of depositing in a complete state.

The conventional technology disclosed in Japanese Patent Application Laid-Open No. 55-79810 (1988) discloses a method of depositing ores and coke in a light-heavy mixed state, instead of depositing ores and coke in layers in the same furnace as in the past. At the very least, some suggestions are being made to improve the air permeability, gas availability, and gas utilization within the furnace by operating the furnace first.

However, the same publication describes the specific procedure for depositing ores, coke, and light in a bad mixture.
Employees do not have the means to charge raw materials. In addition, the same publication states that a bell-type material charging device is installed in the material charging device of the blast furnace in which the material is deposited in a light-heavy mixed state; Ore and coke mixed raw materials are obtained by special means in the raw material transfer path at the top hopper site of the type raw material charging device, and the completely mixed raw materials are stored in the furnace top hopper. It is thought that it is formed by carrying out charging. However, the existing bell-type charging equipment that is designed to perform layered deposition? i
There is no special mixing means in the raw material binding system, and Taiki 4 odor O
)'7 Investments for cattle will be cheaper.

The purpose of one blade is the same as that of a tree.''
In particular, the turning chute type charging device ASU4, which is known per se as No. 1971-15'I'08] □1) Makes effective use of the molding cage and adds engineering features to the operating method of the device. By the way,
The ore and coke are deposited in the furnace in a photo-acoustic mixed state. Scale 7+: Installation 1ite without any investment and trade costs, excellent permeability, reducing properties, waste utilization rate 1, ore power 1, coke light, completely mixed state of formation in a circle, a remarkable invention. Structure and Function The charging method of the present invention will be explained in detail below with reference to the drawings.

FIG. 1 shows an example of the layout of a furnace top hopper in a rotating chute-type charging device, and FIG. 2 shows a schematic diagram of the AA cross section in FIG. 1. In Fig. 1, 1.2 and 3.4 are the furnace top hoppers arranged at an angle of 901 points apart on the momme shell. Lump coke, large ore or charging storage a. A pair of hoppers 2 and 4 arranged in a trench are charged with small coke and small lump ore, respectively, and stored oil. In Figure 2, 5 is a 7-layered chute 1 kate-sho, 6 is a 1-uta-chan shoot, 7 is a 1st shot, 8 is a rotating chute under the chute '7', and this chute 8 is Print 111 o @You can change the elevation angle as a fulcrum.

Reference numeral 9 indicates a collision plate provided at the forward end of the rotating chute 8, which is not shown in the perspective view of FIG. 11 is conveyor 1
2 to raw material, namely large coke.

This is a rotating chute at the top of the furnace that receives small coke, large lump ores, and small lump ores and supplies them to hoppers], 2, and 3.4, respectively. 13 is a raw material stock line in the furnace 14, of course.

In addition, in Fig. 2 (- indicates the hopper 4 and the inclined shoe of the hopper 4), the gate valve, and each hopper 1.2,
3.4 The upper and lower seal valves are not shown.

In the above-mentioned example of a rotating seven-unit charging system, the gate valves of hopper 1.3 were opened at the same time, large lumps of coke, large lumps of coke, and round 1 lumps of coke were produced. The rotating chute 8 is slid through the dyeing chute 7 through the gutter 526, and the mixed ores and coke are transferred to the collision plate 9 through the YIII mixer. Station 14 on the same falling trajectory
Charged to Yen under the road. This 1 = 100 kg raw material is charged into the central part 15 of the furnace in order to fully develop the central gas flow by adjusting the elevation angle of the chute 8 (1).

Next, hopper 2.4 (/, 1 gate valve at the same time 15i9
A rotating chute 8 which allows the small coke and small ore to flow into the collecting vertical chute 7 through each slope/neat. I. Pass through the Aya board 9 and charge underground into the furnace 14.
8 (D (11)
At the angle of elevation, the surrounding gas is charged into the peripheral portion 16 at an elevation of +l1ll.

In addition, a conveyor with a 12° unit 1. The large coke is transferred to the wall hopper 1 through the l>c valve, and then charged into the nitrogen hopper 3 and stored in the large coke basin.

and 17) simultaneous cutting of large lump coke and ores.
Simultaneous quarrying of small coke and ores.
Then, the raw material is charged into f14.

As described above, in the rotating chute type charging device 1 of 1st to 3rd generation, the ore and coke that are cut out by cutting out the ore and coke in the independent trap hopper at the same time are Collective vertical chute 7° rotating chute s,
(Effectively mixed in the main path between the Hq printing plate 9 and the stock line 13), and deposited in the open furnace 14 in a mixed state.

1; 11, the ores and coke that were cut out at the same time are assembled -! 4! Direct shoot 7. A part of the coke is mixed in the rotating chute 8, but due to the difference in specific gravity between the ore and coke, the coke floats twice in the swirl/neat 8", and the ore slides on the concave bottom of the rotating chute 8 as soil and swirls. From the tip of No. 8, the coke moves further away, that is, toward the furnace wall, and the ores move further toward the middle L. At the tip of the above-mentioned rotating chute 8, there is a raw material 11I sliding down the chute 8.
The ore coke that was cut out at the same point where the side veneer 9 fell in the second stage and was partially mixed with it fell onto the side pile and was mixed and charged into the furnace along the same falling trajectory, resulting in a light and heavy mixed pile state. It is something that is created.

Embodiment By the way, using the rotating chute armed man device shown in Fig. 1.2.3, large or small lump ore and large lump or small lump coke of the particle size structure shown in Table 1 are cut out at the same time in the center of the container. or the surrounding area of the furnace, and then perform octopus operation. The operation results at this time are shown in Table 2 together with the results when charging in the conventional 4-layered coke/ore slag.

Table 1 Table 2.

In the charging device shown in the figure, either Ior 'A &'c IMI5i-C is attached to the tip 1 of the rotating chute, or IOR 'A &'c IMI5i-C is attached to the tip of the rotating chute as proposed in Japanese Patent Application Laid-Open No. 49-23'708. [Kaikaku 1hen - Tsukasa Tatami] It would be great if it was set up in a Noh play. In addition, there is a raw material hopper in the row of the indicator device.
f 4 I have a memorial service, but if I store ore or coke in a hopper more than 21 times.
Of course, it is possible to implement the ``no-explosion'' law.

Effects of Kabuto As detailed above, according to the method of charging raw materials into the acid 1 furnace of the present invention, it is possible to use a rotating engine with sheet piles and a swiveling system with a stock pile.
In tube furnaces with a swivel chute type charging plate without requiring any special equipment (11!i investment), and with a rotating chute type charging device without a plate, a side f veneer can be installed. When the small side of the QA is placed in the front corner, the coke and ores, which are raw materials for the gas furnace, can be completely mixed in the front corner of the V'.

[Brief explanation of the drawing]

FIG. (8) is an explanatory diagram of the charging method of the present invention, FIG. 1 is an explanatory diagram of an example of the layout of the octopus hopper, and FIG.
Schematic diagram of blood cutting from A to A in the figures. FIG. 3 is a perspective view of the tip of the rotating chute in FIG. 2. i, 2, 3.4... Furnace] Shellfish hopper 5...
・・Ryubinkun wb gate valve 6・・・・・1 song addition [Chute 7・・・・Collected vertical chute 8・・・Turn 1 o1 chute 9・・・Value projecting board] O・・・・... Axis 11 ... Furnace top rotation/Neat J2 ... Conveyor 13 ... Raw material stock line 14 Pa° - High r 15 ... ... Center part inside the furnace 16 ... ...Furnace I7j peripheral area application “Nippon Steel Corporation”

Claims (1)

[Claims] a plurality of hoppers for charging and storing ores or coke;
By opening and closing the flow control gate valve of this display bar, the raw material that has been cut out from the hopper is guided to the vertical chute where it is collected and collected. Hina turning chute and this/
) Swivel chute slide ID I set at the tip of the swing soyute
1, 1, 1, 2, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3. ；Noga- no full = y stroke 1] Open the gate at the same time Grain sword 4
The J-Takumi cutting method is characterized by the fact that it cuts out both coke and coke at the same time.