KR100285257B1 - Upper ore charging method and apparatus for increasing sintering recovery ratio - Google Patents

Abstract

PURPOSE: Upper ore charging method and apparatus for increasing sintering recovery ratio are provided which selectively separate and charge grain sizes of the upper ore and self-returned ore onto the sintering bed in sintering process. CONSTITUTION: The upper ore charging method for increasing sintering recovery ratio comprises the steps of inputting the sensed actual thickness of the upper ore(2) into a level controller(22) by sensing an actual thickness of the upper ore charged onto the upper part of a sintering car(6) by a distance detector(20-1), and automatically adjusting a level gate(5-1) by a level gate driver(21-1) by output of the level controller(22); storing a part of self-returned ore(17) generated in a third grain size sorter(16) into a hopper(19) by a conveyor belt(18), and charging the self-returned ore(17) stored in the hopper(19) onto the upper part of the upper ore(2) to an input thickness of a level gate(5-2); inputting the sensed actual thickness into the level controller(22) by sensing an actual thickness of the self-returned ore(17) charged onto the upper part of the upper ore(2) by a distance detector(20-2), and automatically adjusting the level gate(5-2) by a level gate driver(21-2) by output of the level controller(22); and charging blended raw materials for sintering(7) of a hopper(8) onto the upper part of the self-returned ore.

Description

Top light charging method and apparatus therefor for increasing sinter recovery rate

1 is a schematic diagram showing charging of top light according to the prior art.

Figure 2 is a schematic diagram showing a state of loading light according to the prior art.

3 is a schematic view of a top light charging method and apparatus for increasing the recovery rate of sintering according to the present invention.

4 is a schematic view showing a top light charging method for increasing the recovery rate of sintering according to the present invention and a top light loading state by the apparatus.

5 is a graph (A) showing the correlation between the upper light residual ratio (%) and the upper light height after sintering by the upper light charging method for increasing the sinter recovery rate and the apparatus according to the present invention, and the upper light residual ratio (% ) And a graph (B) showing the correlation between the top light particle size.

* Explanation of symbols for main parts of the drawings

1: 2nd particle size sorter 2: Upper light

3: upper light carrying belt conveyor 4: upper light hopper

5-1,5-2: Level gate 6: Sintering machine bogie

7: Blended raw material for sintering 8: Blended raw material for sintering

9: split gate 10: drum feeder

11: the plector plate 12: meter reading rod

13: cut off plate 14: press roller

15: ignition furnace 16: 3rd particle size sorter

17: self-reflecting 18: self-reflecting conveying belt conveyor

19: self-glow hopper 20-1,20-2: distance detector

21-1,21-2: Level gauge drive device 22: Level controller

23: Great Bar 24: Primary Intake Selector

25: sintered ore 26: post process

27: recycling

The present invention relates to a top light charging method for increasing the sinter recovery rate and apparatus therefor, in particular, in the sintering process, a top light charging method for increasing the sinter recovery rate by selectively separating and charging the upper half-wave semi-glow particle size on the sintering bed and To the device.

In general, as shown in FIG. 1 showing the sintering process, the upper light 2 is an 8 to 15 mm neutral generated in the secondary particle size selector 1 during the particle size selection process after the sintered ore 25 is manufactured. The phenomenon that the sintered compound raw material (7), which is first loaded into the sintering machine balance (PALLET) 6 with a thickness of 50 mm and then loaded thereon, is melt-bonded to the surface of the sintering machine trolley 6 during the sintering process. The sintered ore used for the purpose of preventing the sintering of the finely blended sintered raw material 7 between the GRATE BAR 23 forming the bogie surface (5 mm), and the unrecovered sintered ore Is then sent to the process.

In addition, in the sintering process, the self semi-glossy 17 refers to a small sintered ore of 5 mm or less generated in the tertiary particle size sorter 16 during the particle size selection process after the sintering ore is manufactured. It is added to the blended raw material (7) and reused.

At this time, the amount of self-reflected light must be used as much as the coke of fuel is used, so if the amount of self-reflected light has a characteristic of increasing fuel use costs.

The recovery rate of the sintered ore means the percentage of the total amount of sintered ore that is sent to the post process, except for its own semi-glossy (17) which cannot be used in the later process and some upper light charged in the lower part of the sintered bed. .

That is, the sintered ore that can be used in a later process among the total production of the sintered ore 2S is calculated by the following formula, and the recovery rate is increased.

Recovery rate (%) = total output x 100 / light distribution

(Light distribution: total output + self-light generation)

In the conventional sintering process, the charging of the upper light 2 carries the upper light 2 of 8 to 15 mm size filtered by the secondary particle size sorter 1 through some of the upper light conveying belt conveyors 3 so that the upper light hopper ( After storage in 4), a certain thickness is continuously supplied on the sintering machine trolley 6 before the compounding material for sintering 7 by the level gate 5-1.

In addition, the sintering compounding material 7 is stored in the sintering compounding material hopper 8 and then supplied to the sintering machine bogie 6 in which the upper light 2 is first charged through the split gate 11.

At this time the rotational speed of the drum feeder (Drum Feeder) 10 is operated by an online system by the meter bar (12).

Here, the sintering compounding material 7 charged on the sintering machine trolley 6 is held at a constant height by the cut-off plate 13 and is compacted as it passes through the press roller 14, and in the ignition furnace 15 At the time when sintering is completed and sintering is completed, some of the upper light is melted by the heat of combustion of the powdered coke mixed in the compounding material for sintering 7 to be discharged to the sintered ore mass and the rest is discharged as it is.

As described above, when the sintered ore is manufactured by charging the upper light 2 having a thickness of 8-l5mm to a predetermined thickness, some of the upper light is melted to become the sintered ore, but the majority of the upper light is discharged as it is and is filtered in the secondary particle sorting (1). The circulation charged in the sintering machine trolley 6 is repeated.

In addition, the particle size of the upper light 2 is a particle size that can be sufficiently used in a later process, and thus a large amount of the particle size has a problem of decreasing the recovery rate of the sintered light as the circulation is repeated in the sintering process.

The present invention can solve the conventional problems as described above to reduce the fuel consumption, the upper light can be used in the post-processing method and apparatus for charging the upper light for increasing the sintering recovery rate can be minimized in the sintering process The purpose is to provide.

In order to achieve the above object, according to the present invention, the upper light generated in the secondary particle size selector is stored in the hopper by a conveyor belt, and the upper light stored in the hopper has a thickness of the level gate adjusted by the level gate driver. In the upper light charging method is charged in the upper portion of the trolley, the compound material for sintering of the hopper is charged in the upper portion of the upper light, the actual thickness of the upper light charged in the upper portion of the sintering machine trolley is sensed by the distance detector level controller A level gate driver automatically adjusting the level gate by an output of the level controller; A portion of the self-reflection generated in the third particle size sorter is stored in the hopper by the conveyor belt, and the self-reflection stored in the hopper is charged on the upper part of the upper light at the input thickness of the level gate; The actual thickness of the self-reflected light on the upper portion of the upper light is sensed by the distance detector is input to the level controller, the level gate driver is configured to automatically adjust the level gate by the output of the level controller It provides a top light charging method for increasing the sinter recovery.

In addition, the present invention is the upper light generated in the secondary particle size selector is stored in the hopper by the conveyor belt, the upper light stored in the hopper is charged to the top of the sintering machine bogie with the thickness of the level gate adjusted by the level gate driver. In the upper light charging device in which the compound material for sintering of the hopper is charged to the upper part of the upper light, the self-reflecting hopper installed between the upper light hopper and the compounding material hopper for sintering is partially self-reflected generated by the tertiary particle size sorter. A level gate stored by the conveyor belt and adjusted by a level gate driver is provided below the self-reflecting hopper, and the level gate driver is controlled by a distance sensor and a level controller to increase the sinter recovery rate. It provides a top light charging device for.

The configuration of the present invention will be described in detail with reference to the drawings.

3 is a schematic view of a top light charging apparatus for increasing the sinter recovery rate according to the present invention.

The upper light conveying belt conveyor (3) is installed from the secondary particle size selector (1) to the upper optical hopper (4), and the self-reflecting conveying belt conveyor (18) is a self-reflecting light generated by the tertiary particle size sorter (16). Carry (17) to its own semi-light hopper (19).

The upper light hopper 4 stores the upper light 2 generated by the secondary particle size selector 1 and is formed in a funnel-shaped vertical shape so as to be cut out by its own weight. The level gate 5-1 for adjusting the thickness and the level gate driver 21-1 for operating the thickness are vertically installed in the direction of cutting the upper light 2.

In addition, the self-reflective hopper 19 stores the self-reflected light 17 generated by the tertiary particle size selector 16, like the upper light hopper 4, and has a funnel-shaped vertical shape so as to be cut out by its own weight. The level gate 5-2 for adjusting the charging thickness of the self-reflecting light 17 and the level gate driver 21-2 for operating the self-reflecting light 17 are located in the direction in which the self-reflecting light 17 is cut out.

On the other hand, the distance detectors 20-1 and 20-2 are auxiliary devices for monitoring whether the thickness of the upper light 2 and its own half light 17 are operating as input values, and generate ultrasonic waves to measure the distance and measure the value. It is sent to the level controller 22.

At this time, the level controller 22 is converted into the charging thickness of the upper light 2 and the self-reflecting light 17, and outputs the difference between the input value and the actual value to the level gate drivers 21-1 and 21-2. Automatic adjustment

A charging method of the upper light charging device for the sinter recovery rate significant according to the present invention will be described with reference to the drawings.

Some of the upper light 2 generated by the secondary particle size selector 1 is transported and stored by the upper light conveying belt conveyor 3 to the upper light hopper 4, and the self-light is generated by the tertiary particle size selector 16. Some of the 17 are transported and stored in its own half-light hopper 19 with its own half-light conveying belt conveyor 18.

In addition, when the sintering machine trolley 6 proceeds, the upper light 2 of 5 mm or more stored in the upper light hopper 4 is first charged into the upper part of the sintering machine trolley 6 by the level gate 5-1, and then slightly passed. 5 mm or less of self-reflecting light 17 stored in the self-reflecting hopper 19 is charged above the upper light 2.

At this time, the thickness of the upper light (2) and the self-half (17) to be loaded, respectively, is sensed by the distance detectors (20-1, 20-2) and sent to the level controller 22, the fixed value (input value) and the actual value The difference is transmitted to the level gate driving units 21-1 and 21-2 by the online system and automatically adjusted.

The present invention will be described in more detail with reference to the following Examples.

4 is a schematic view showing a top light charging method for increasing the recovery rate of sintering according to the present invention and a top light loading state by the apparatus.

The present invention is designed to charge the semi-glossy (17) at the top and the upper light (2) at the bottom to melt the larger particle size more easily with the same amount of heat during the sintering reaction.

The large particle size top light 2 also prevents the small particle size of its own semi-glow 17 from escaping between the great bars (5 mm) forming the surface of the sintering machine trolley 6.

5 is a graph (A) showing the correlation between the upper light residual ratio (%) and the upper light height after sintering by the upper light charging method and the apparatus for increasing the sinter recovery rate according to the present invention, the upper light residual ratio ( %) And upper light particle size are graphs (B).

5 (a) is a test of the upper light residual ratio by varying the upper and lower heights of the upper light 2 and the self-reflecting light 17 according to the present invention, the higher the half-height height, the lower the residual ratio. In addition, the smaller the particle size, the lower the residual ratio.

That is, the higher the height of the semi-glossy 17 and the smaller the particle size, the higher the melting ratio.

5 (b) shows that the sintered bed negative pressure is 1300, 1500 and 1700 (mmAq) while fixing the height of the self-reflected light 17 / upper light 2 (upper / lower) to 30/20 and changing the self-reflected particle size. When the upper light residual ratio was tested, it was found that the lower the half-light particle size and the higher the negative pressure, the lower the upper light residual ratio was.

The target components of the sintered ore used at this time are shown in Table 1 below.

TABLE 1

TABLE 2

Table 2 shows the results of a laboratory sintering test by applying the conventional method and the upper light charging method according to the present invention, by separating the particle size than the conventional method using the mixed light without the particle size In the case of the present invention used, it can be seen that the recovery rate and the room temperature strength are improved by 1.3% and 1.1%, respectively.

When the upper part of the upper light is used as the self-reflection, since the particle size of the self-reflection is small, the specific surface area is increased so that it can be firmly combined with the melt formed by the sintering reaction of the blended raw material. This is because the case of semi-glossy is more activated in the bonding with the sintered layer than the upper particle of the large particle size.

TABLE 3

Table 3 shows the results of the test operation in the 4 sintering plant of Gwangyang Works. Since the heat loss to the outside due to the contact with the air of the side wall is relatively reduced in laboratory experiments, the heat accumulation at the bottom of the sintered layer is further increased. This increased the sintered cake of the semi-gloss on top of the upper light, improving the recovery by 2.5%.

The present invention uses the property that fine particles are easily melted by selectively separating and charging the particle size of the upper light and its own semi-glow, that is, through the method of charging the upper light of the coarse particles in the upper part of the semi-glow of the fine particle in the lower part. Since the semi-melt is melted and discharged, it is possible to minimize the use of the self-reflected amount of reuse in the sintering process, thereby increasing the sinter recovery rate.

Claims (2)

The upper light 2 generated by the secondary particle size selector 1 is stored in the hopper 4 by the conveyor belt 3, and the upper light 2 stored in the hopper 4 is the level gate driver 21-. It is charged in the upper part of the sintering machine trolley 6 with the thickness of the level gate 5-1 adjusted by 1), The compound raw material for sintering of the hopper 8 is inserted in the upper part of the said top light 2. In the charging method of the upper light to be charged, the actual thickness of the upper light 2 charged to the upper portion of the sintering machine cart 6 is sensed by the distance detector 20-1 and input to the level controller 22, The level gate driver (21-1) automatically adjusting the level gate (5-1) by the output of the level controller (22); A part of the self-reflection 17 generated in the third degree-of-gravity sorter 16 is stored in the hopper 19 by the conveyor belt 18, and the self-reflection 17 stored in the hopper 19 is stored in the level gate 5. Charging to the upper portion of the upper light (2) with an input thickness of -2); The actual thickness of the self-reflecting light 17 charged to the upper portion of the upper light 2 is detected by the distance detector 20-2 and input to the level controller 22, and by the output of the level controller 22. The level gate driver 21-2 automatically adjusting the level gate 5-2; The method of charging the upper light for increasing the recovery rate of sintering, characterized in that consisting of the step of charging the sintering compounding material (7) of the hopper (8) on top of the self-reflecting (17). The upper light 2 generated by the secondary particle size selector 1 is stored in the hopper 4 by the conveyor belt 3, and the upper light 2 stored in the hopper 4 is the level gate driver 21-. It is charged in the upper part of the sintering machine trolley 6 with the thickness of the level gate 5-1 adjusted by 1), The compound raw material for sintering of the hopper 8 is inserted in the upper part of the said top light 2. In the upper light charging device to be charged, the self-reflecting hopper 19 installed between the upper light hopper 4 and the compound material hopper for sintering is partially self-reflecting generated by the tertiary degree of sorting device 16 ( 17 is stored by the conveyor belt 18, and the level gate 5-2 adjusted by the level gate driver 21-2 is installed below the self-reflecting hopper 19, and the level gate driver (21-1) (21-2) is an upper light charging device for the sintering recovery rate, characterized in that the distance sensor 20-1 (20-2) and the level controller 22 is controlled.