KR20020042893A - A sintering machine - Google Patents

Abstract

PURPOSE: A sintering machine for easily controlling sintering temperature is provided to improve sintering productivity by easily controlling temperature according to positions of wind boxes during sintering operation. CONSTITUTION: The sintering machine for easily controlling sintering temperature comprises a drum feeder(120) feeding blended raw materials stored in a blending hopper(110); a sintering car(130) charging the blended raw materials(100) through the drum feeder(120); a heating furnace(140) igniting the surface of raw materials charged onto the upper side of the sintering car(130); wind boxes(200) installed at the lower part of the sintering car(130) to suck in air using a main blower(150); and one or more oxygen ejection means(10) which are installed at the upper part of the sintering car(130) according to certain positions of the wind boxes(200) to eject oxygen onto the surface of the blended raw materials(100), wherein the oxygen ejection means(10) further comprises an oxygen pipe(30) expanded to the inner side of a sealing type hood(20) fixed in a width direction of the sintering car(130); an oxygen nozzle(40) arranged inside the hood(20) so that the oxygen nozzle(40) faces a width direction of the sintering car(130) and the surface of the raw materials(100); and a surge tank(50) to which the oxygen pipe(30) is connected.

Description

Sintering device for easy control of sintering temperature {A SINTERING MACHINE}

The present invention relates to a sintering apparatus (SINTERING MACHINE) for manufacturing a sintered ore used in the blast furnace of the steel mill, and more particularly, the sintering operation is more than the appropriate temperature according to the position of the wind box installed in the lower portion of the bogie when manufacturing the sintered ore The present invention relates to a sintering device that can be easily adjusted to control the sintering temperature to facilitate the temperature control according to the windbox position during the sintering operation to improve the sintering manufacturing productivity.

A generally known sintering process is shown in FIG. 1. In this sintering process, a sintering raw material mixed with various iron ores and an auxiliary raw material and a blending raw material 100 including a powdered coke are stored in the hopper 110. Through this, the blended raw material 100 is charged onto the sintered trolley 130 as the drum type extruder 120.

Then, the ignition furnace 140 is ignited on the surface of the blended raw material 100 charged in the sintered bogie 130, and then a large main blower 150 installed below the sintered bogie 130. By operating the through the various wind box 200 installed to the lower side of the sintering cart 130 to form an effective image area of the raw material from the surface to the lower windbox 200 side of the trolley 130, which is in the suction blower 150 This is because external air is forced into the podbox.

By the way, the series of sintering reaction as described above is due to the combustion process of the powdered coke, which is a heat source in the blended raw material, the volume of the blended raw material is reduced by evaporation of moisture in the blended raw material, the reaction process in the sintered layer is usually a raw material It can be divided into a zone, a reaction zone, a sintering zone, and a completion zone.

In addition, the hot air sucked through the wind box 200 is discharged to the external gas through the flue 180 after the dust is collected in the process dust collector 170 through the main duct 160, the sintered ore is fired After cooling is used as raw material of the blast furnace through the characterization process.

On the other hand, Figure 2 shows the distribution of the sintering temperature according to the position of the wonder box 200.

That is, as shown in FIG. 2, when the wind box 200 installed in the lower portion of the sintering trolley 130 and performing air suction by the main blower 150 is installed approximately 25, when the normal sintering process proceeds. In the 17th windbox 200a and 19th windbox 200b, the temperature of the air sucked in accordance with the sintering process should be maintained at 100 ° C and 160 ° C or higher, and the 23rd windbox 200c, that is, the sintering temperature At the peak, the temperature of the intake air should be maintained at approximately 400 ° C or higher.

However, during the sintering operation, the operator may predict such as a large amount of fine dust included in the blended raw material, surface unevenness of the blended raw material, large amount of sedimentation basin, securing adequate water content, micron dust cutting fractionation day, and incorporating a large amount of adhesion light into the charging device. Unexpected accidents occur frequently, which in turn lowers the internal breathability of the blended raw material 100 and delays the combustion of the powdered coke which is a heat source in the blended raw material.

Therefore, the sintering operation is considerably delayed and a problem of discharging the micro-light is generated, which is caused by the air temperature in the windboxes 200a and 200b and the windboxes 23 and 23 described above. This results in a phenomenon in which 100 ° C., 160 ° C., and 400 ° C. or more cannot be maintained, respectively.

Therefore, the driver should stop the progress of the sintering bogie and increase the air permeability of the sintered raw material to perform the additional work of increasing the temperature at each of the wind box 200a, 200b, 200c position.

As a result, the production productivity of the sintering operation is lowered, when the discharge of the fine grains of light generated red light during cooling, causing a fire such as a conveying belt, there were a number of problems that reduce the quality of the sintered product.

The present invention has been made in order to improve the various problems as described above, the object of the present invention is to include a large amount of fine dust in the blended raw material during the sintering operation, the surface of the blended raw material is uneven, adequate moisture is not secured, charging Combustion generated during sintering operation by quickly injecting separate oxygen into the compounding material which is sintering if the air temperature passing through the windbox is not maintained at the proper temperature due to poor loading condition of the compounding material such as mixing light of the device. An object of the present invention is to provide a sintering device that can easily control the sintering temperature to prevent delays and improve the quality of the sintered product.

In addition, another object of the present invention, it is easy to control the sintering temperature to prevent the production of microglow by the smooth sintering operation to prevent the occurrence of red light and the occurrence of equipment fires, such as belt fires when cooling by the microglow. It is to provide a sintering apparatus.

1 is a schematic process flow diagram shown to explain a typical sintering plant

Figure 2 is a schematic diagram showing the temperature distribution according to the position of the wind box in the conventional sintering apparatus

Figure 3 is an overall configuration showing a sintering apparatus easy to control the sintering temperature according to the present invention

Figure 4 is a perspective view showing the oxygen injection means in the present inventors sintering apparatus

5 is a graph showing the volume and temperature changes in the wind box of the present invention through the conventional and oxygen injection

Explanation of symbols on the main parts of the drawings

1 .... Sintering apparatus 10 ... Oxygen injection means

20 .... hood22 .... barrier

30 ... oxygen tube 40 ... oxygen nozzle

50 .... surge tank 52 .... oxygen supply pipe

54 ... pressure gauge 60 ... temperature sensor

70 .... Flow control valve 72 .... Flow sensor

100 .... Blended ingredients 120 .... Cutting machine

130 .... Sintering cart 140 .... Furnace

200 .... windbox

As a technical configuration for achieving the above object, the present invention, a drum cutting machine for dispensing the compounding material stored in the compounding hopper; And,

A sintered trolley for charging a blended raw material through the drum cutter; and

A heating furnace complexing the surface of the raw material charged into the upper side of the sintering cart;

A wind box installed to suck air as a main blower under the sinter truck; And,

According to the predetermined position of the wind box to the upper side of the trolley by providing an sintering device that can easily control the sintering temperature including at least one or more oxygen injection means is installed to spray oxygen on the surface of the blended raw material.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, the same parts as in the prior art will be denoted by the same reference numerals.

Figure 3 is an overall configuration diagram showing a sintering apparatus that is easy to control the sintering temperature according to the present invention, Figure 4 is a perspective view showing the oxygen injection means in the sintering apparatus of the present invention.

Figure 3 shows the sintering apparatus (1) easy to control the sintering temperature of the present invention, the apparatus 1 of the present invention is a drum section for discharging the compounding material 100 stored in the compounding hopper 110 largely A heating furnace 140 for igniting the extractor 120, the sintered bogie 130 for charging the blended raw material 100 through the drum cutter 120, and the raw material surface charged to the upper side of the sintered bogie 130. ), And a wind box 200 installed at the lower side of the sintering trolley 130 as a main blower 150 to inhale air, and in addition, the trolley 130 according to a predetermined position of the wind box 200. At least one oxygen injection means 10 which is installed to inject oxygen to the surface of the blended raw material 100 above).

On the other hand, Figure 4 shows the oxygen injection means 10 in more detail, Looking at such an oxygen injection means 10 in more detail, the hood fixed to the upper portion in the width direction of the bogie 130 ( Oxygen tube 30 extending inwardly of 20, the oxygen nozzle 40 arranged in the hood 20 toward the width direction of the trolley 130 and the surface of the raw material 100, and the It is made as a surge tank 50 to which the oxygen pipe 30 is connected.

On the other hand, the hood 20 is not shown in the drawing, but if it is to be formed of a heat resistant material that can withstand high temperatures, the hood 20 is formed wider than the lower side.

And, the hood 20 is located in the vertical direction in the 17th and 19th windbox 200a (200b) of the windbox 200 installed on the lower side of the cart 130, each of the windbox 200a and 200b are respectively provided with temperature sensors 60a and 60b for measuring the temperature of the intake air.

On the other hand, the oxygen pipe 30 is arranged in parallel in the hood 20, one oxygen pipe 40 is provided with approximately 20 oxygen nozzles 40, the oxygen nozzle 40 at intervals of approximately 200mm It is preferable to install.

In addition, the temperature sensors 60 through the flow control valve (70a) 70b and the control unit (C) installed in the oxygen pipe 30 to be electrically connected to the flow sensor 72 installed in the oxygen pipe (30). The flow control valves 70 are connected to maintain the intake air temperature in the windboxes 200a and 200b at 17 and 19 measured by the temperature sensor 60 to be maintained at 100 ° C and 160 ° C or higher. , To be electrically connected to the control unit (C) to operate.

On the other hand, the heat-resistant blocking film 22 which is in close contact with the raw material surface 100a being sintered and blocks the atmospheric exposure of oxygen is installed on the outer side of the hood 20, and the oxygen supply pipe 52 connected to the surge tank 50 is provided. The opening and closing valve 52a is installed on the tank and connected to the pressure gauge 54 for detecting an internal pressure.

Referring to the operation and effects of the present invention made in the above configuration in more detail as follows, the same parts as in the prior art are represented by the same reference numerals.

As shown in Figures 3 and 4, the temperature of the intake air in the wind box 200 at a certain position during sintering at a predetermined position or more depending on the poor loading state of the raw materials, such as mixing of the dust generated when the blending raw materials When not maintained, the sintering apparatus 1 that can easily adjust the sintering temperature of the present invention to adjust the temperature of the sintering temperature in response to this is as follows.

First, when the blending raw material 100 is charged to the truck 130 through the blending hopper 110 and the drum cutting machine 120, the blending raw material 100 charged on the truck by the ignition furnace 140 on the upper side of the truck. The surface is ignited to begin sintering.

And, as shown in Figure 3, the main blower 150 is operated to generate combustion through the inside from the surface of the blended raw material 100 through the wind box 200 installed on the lower side of the truck 130 It is discharged through the duct, dust collector and flue.

In this case, as shown in FIG. 4, temperature sensors 60a and 60b are respectively installed in the 17th and 19th wand boxes 200a and 200b of the windbox 200, respectively. The intake air temperature is measured at approximately 7 second intervals.

Meanwhile, if the temperature of the intake air measured by the temperature sensor 60a of the seventeenth wind box 200a is less than 100 ° C., the controller C connected to the temperature sensor 60a may control the seventeenth wind box 200a. The flow control valve 70a installed in the oxygen pipe 40 extending toward the side of the tube according to the above temperature, that is, if the temperature is 99-90 ° C, the flow control valve 70a is opened about 25% and gradually increases according to the temperature difference. The amount of opening is increased.

Therefore, in the oxygen injection nozzles 40 of approximately 20 installed in the oxygen pipe 40 in the hood 20 located in the vertical direction of the seventeenth wind box 200a above the bogie 130, oxygen is produced. Is sprayed on the surface 100a of the blended raw material 100 being sintered. As described in detail below, the oxygen pipe 40 is connected to the surge tank 50 to supply oxygen.

On the other hand, when the intake air temperature of the seventeenth wind box 200a is 100 ° C. or more, the flow control valve 70a does not open and close and proceeds to the sintering process, whereas the intake temperature in the nineteenth wind box 200b is reversed. Is less than 160 ° C., the oxygen is sprayed through the oxygen nozzle 40 in the hood 20 positioned in the vertical direction as described above to maintain the temperature at 160 ° C. or more. A flow control valve 70b that is opened and closed through the 60b and the control unit C is provided.

In addition, the respective flow control valves 70 are installed in the oxygen pipe 40 adjacent to the tank 50 and are connected to the flow sensor 72 connected to the control unit C, so that the compounding material always has an appropriate amount of oxygen ( Oxygen is sprayed onto the surface 100a of 100).

At this time, the outer surface of the hood 20 is a barrier film 22 made of a heat-resistant cloth is fixed to extend to the compound material surface (100a) while wrapping the hood, the compound material surface (100a) inside the hood (20) It effectively prevents the injected oxygen to leak into the atmosphere.

As shown in FIG. 3, a pressure gauge 54 is connected to the surge tank 50 so that the pressure gauge 54 operates when the oxygen pressure in the surge tank 50 is 6 kg / cm 3 or more. It is installed in the oxygen supply pipe 52 connected to the surge tank 50 side and the on-off valve 52a which is electrically connected to the pressure gauge 54 is operated to stop the oxygen supply, otherwise the open-open valve 52b is operated To advance the oxygen supply to the surge tank (50).

Therefore, during the sintering operation, the temperature drop of windbox Nos. 17 and 19 (200a, 200b), which is caused by a poor loading state of the compounding material, is rapidly maintained at a constant temperature at all times without interruption of the sintering cart. To make it smooth.

And, Figure 5 is a graph showing the changes in volume and temperature in the windbox of the present invention through the conventional and oxygen injection, the volume change of the conventional and the present invention in the windbox No. 17 is approximately to reach the windbox No. 17 It can be seen that the volume decreases rapidly in the case of the present invention at the 25 minute point, which indicates that the sintering proceeds more smoothly than the conventional one and the volume of the sintered layer is reduced.

In addition, when looking at the temperature change in the wind boxes 17 and 19, it can be seen that when the oxygen injection of the present invention, the temperature is lowered at 100 ° C. and 160 ° C. and then rapidly rises to the original error and is kept constant. In the related art, it can be seen that the temperature decreases rapidly and then returns to the original temperature considerably later than the present invention.

As described above, according to the sintering apparatus which can easily control the sintering temperature of the present invention, if the air temperature passing through the windbox is not maintained at the proper temperature due to poor charging conditions of the blended raw materials, another oxygen is rapidly injected into the blended raw materials being sintered. By preventing the combustion delay generated during the sintering operation has the advantage to improve the quality of the sintered product.

In addition, it is possible to prevent the production of fine grains by smooth sintering operation, thereby preventing the occurrence of red light and cooling accidents caused by the fine grains and preventing equipment accidents such as belt fires.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to know that those who have knowledge of this can easily know.

Claims (5)

Drum cutting machine 120 for dispensing the blending raw material 100 stored in the blending hopper 110; And, Sintering cart 130 to charge the blending raw material 100 through the drum extruder 120; And, A heating furnace 140 which complexes the raw material surface charged to the upper side of the sintering cart 130; and A wind box 200 installed at a lower side of the sintering cart 130 as a main blower 150 to suck air; And, Sintering characterized in that it comprises at least one oxygen injection means (10) which is installed to inject oxygen to the surface of the blended raw material 100 to the upper side of the trolley 130 according to a predetermined position of the wind box 200 Sintering device for easy temperature control The method of claim 1, wherein the oxygen injection means 10, An oxygen tube 30 extending inwardly of the hermetic hood 20 fixed in the width direction of the trolley 130, An oxygen nozzle 40 arranged inwardly of the hood 20 toward the width direction of the trolley 130 and the surface of the raw material 100; Surge device for easy control of the sintering temperature, characterized in that configured as; a surge tank 50 to which the oxygen pipe 30 is connected; According to claim 2, wherein the hood (20) is located vertically in the upper direction of the windboxes 200a and 200b (17) and 19 installed on the lower side of the bogie, and each of the wind box (200a) (200b) Sintering apparatus that can easily control the sintering temperature, characterized in that the temperature sensor (60a, 60b) for measuring the temperature of the intake air is installed respectively The flow rate control valve (70a) (70b) of claim 2 or 3, wherein the temperature sensors (60) are electrically connected to the flow rate sensor (72) installed in the oxygen pipe (30). And the control unit (C), the flow control valves 70 are 100 ℃ the intake air temperature in the windbox 200a (200b), the number 17 and 19 measured by the temperature sensor 60 And sintering apparatus for controlling the sintering temperature, characterized in that the opening and closing operation to maintain more than 160 ℃ The oxygen supply pipe of claim 1, wherein a heat resistant barrier film 22 is installed on the outer surface of the hood 20 to close the raw material surface 100a during sintering and block atmospheric exposure of oxygen, and is connected to the surge tank 50. Sintering device is easy to control the sintering temperature, characterized in that 52 is installed on the tank is connected to the open and close valve 52a is connected to the pressure gauge 54 for sensing the internal pressure