KR20160089552A - Sintering apparatus and sintering method - Google Patents

Sintering apparatus and sintering method Download PDF

Info

Publication number
KR20160089552A
KR20160089552A KR1020140181840A KR20140181840A KR20160089552A KR 20160089552 A KR20160089552 A KR 20160089552A KR 1020140181840 A KR1020140181840 A KR 1020140181840A KR 20140181840 A KR20140181840 A KR 20140181840A KR 20160089552 A KR20160089552 A KR 20160089552A
Authority
KR
South Korea
Prior art keywords
sintering
raw material
oxygen
sintered
bogie
Prior art date
Application number
KR1020140181840A
Other languages
Korean (ko)
Inventor
정해권
정은호
조병국
최만수
박종인
Original Assignee
주식회사 포스코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR1020140181840A priority Critical patent/KR20160089552A/en
Priority to BR112017012466A priority patent/BR112017012466A2/en
Priority to CN201580068926.7A priority patent/CN107109518A/en
Priority to JP2017529987A priority patent/JP2018503046A/en
Priority to PCT/KR2015/010309 priority patent/WO2016099010A1/en
Publication of KR20160089552A publication Critical patent/KR20160089552A/en

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C22B1/20—Sintering; Agglomerating in sintering machines with movable grates

Abstract

A sintering machine according to an embodiment of the present invention includes a conveying part positioned between a hopper part for supplying a sintering material and a light shading part for sintering and discharging the sintering material and circulating the sintering vehicle on which the sintering material is placed, A wind box portion provided at a lower portion of the sintering carriage and sucking a gas inside the sintering carriage, and a region in which the temperature of the glowing layer in which the sintering material is burned is lower than 1200 캜 And a glowing layer homogenizing unit disposed downstream of the ignition in the traveling direction of the sintered bogie.
According to another aspect of the present invention, there is provided a sintering method comprising: a charging step of supplying a raw material for sintering with a sintering vehicle circulated in a hopper; an ignition step of igniting the surface of the raw material of sinter; Wherein the sintering raw material is supplied to a region where the temperature of the glowing layer to be burned is lower than 1200 캜, And an oxygen blowing step for independently supplying oxygen gas at the oxygen supply portion located at the rear end.

Figure P1020140181840

Description

[0001] Sintering apparatus and sintering method [0002]

The present invention relates to a sintering machine and a sintering method, and more particularly, to an invention for adjusting the formation of a glowing layer in which raw materials for sintering are burned to produce sintered ores.

The sintering process is a process of sintering fine iron ores to make them suitable for use in blast furnaces.

In this process, the sintered raw material is pseudogranularized and charged at a predetermined height on the sintered bogie, and the sintered raw material is fired while forced air is sucked from below.

Referring to FIG. 1, the upper light stored in the upper light hopper 11 'and the raw materials for sintering stored in the surge hopper 12' are transported in the sintering truck 50 'and transported to the sintering truck 50 'Passes through the lower portion of the ignition furnace 30'. At this time, the flame injected from the ignition furnace 30 'ignites the surface layer which is the upper portion of the raw material for sinter accommodated in the sintering drum 50'.

The bogie that has passed through the ignition furnace 30 'is transported in the process direction by the transfer unit 40'. At this time, the plurality of windbox units 20 ', in which the sintering bogie 50' As shown in FIG.

A suction force is generated in the downward direction in the sintered bogie 50 'passing through the upper side of the wind box portion 20', a flame ignited by the drawn air is moved in the downward direction, and the sintered bogie 50 ' When the flame reaches the wind box portion 20 'located at the end of the process progress, the flame is called to the bottom of the sintering bogie to complete sintering.

However, when the sintered ores are produced by such a process, there is a difference in the distribution of heat along the depth direction of the sintered raw material layer. That is, in the upper layer of the sintering raw material layer, there is a phenomenon that the amount of heat is insufficient due to the inflow of outside air by the suction force of the wind box portion 20 ', and the amount of heat is excessive in the lower layer which is a portion after the outside air is heated through the combustion chamber of the sintered fuel layer Lt; / RTI >

Thus, after completion of the sintered light production process, the surface area of the upper layer is increased to produce a sintered ores having a lower strength but a lower strength, and the lower layer is solidified after melting the sintered raw material layer. There arises a problem that low sintered ores are produced.

Therefore, there is a need to study sintering and sintering methods to solve the above problems.

An object of the present invention is to provide a sintering machine and a sintering method for producing sintered ores having excellent quality by uniformly burning a glowing layer in which raw materials for sinter are burned.

A sintering machine according to an embodiment of the present invention includes a conveying part positioned between a hopper part for supplying a sintering material and a light shading part for sintering and discharging the sintering material and circulating the sintering vehicle on which the sintering material is placed, A wind box portion provided at a lower portion of the sintering carriage and sucking a gas inside the sintering carriage, and a region in which the temperature of the glowing layer in which the sintering material is burned is lower than 1200 캜 And a glowing layer homogenizing unit disposed downstream of the ignition in the traveling direction of the sintered bogie.

In the sintering apparatus according to an embodiment of the present invention, the gaseous layer homogeneous composition unit may be disposed at the rear end of the igniter in the traveling direction of the sintered bogie, and the oxygen And a fuel gas supply unit located at a rear end of the oxygen supply unit in the sintering vehicle traveling direction so as to be provided independently of the oxygen supply unit and supplying the fuel gas.

The oxygen supply unit of the sintering machine according to an embodiment of the present invention may be provided in a plurality of widthwise directions of the sintering vehicle or may be provided at both ends of the sintering vehicle in the width direction.

In addition, the oxygen supply unit of the sintering machine according to an embodiment of the present invention may include a hood member provided on the sintering bogie, a hood member provided inside the hood member, and connected to the oxygen pipe, A nozzle member for injecting oxygen gas, and a buffer member connected to the oxygen pipe and adjusting the pressure of the oxygen gas supplied thereto.

In addition, the hood member of the sintering machine according to an embodiment of the present invention is such that the lower end thereof is provided with a height difference of 10 cm or less with respect to the upper surface of a portion of the sintered material placed on the sintered bogie and higher, . ≪ / RTI >

The nozzle member of the sintering machine according to an embodiment of the present invention is characterized in that the height h of the sintered raw material on the upper surface is provided so as to satisfy at least h = W / (2tan (0.5a)) . Here, W is a unit hood width (W) of the hood member provided with the nozzle member, and a is an injection angle (a) of the oxygen gas injected from the nozzle member.

According to another aspect of the present invention, there is provided a sintering method comprising: a charging step of supplying a raw material for sintering with a sintering vehicle circulated in a hopper; an ignition step of igniting the surface of the raw material of sinter; Wherein the sintering raw material is supplied to a region where the temperature of the glowing layer to be burned is lower than 1200 캜, And an oxygen blowing step for independently supplying oxygen gas at the oxygen supply portion located at the rear end.

In the sintering method according to another embodiment of the present invention, each of the oxygen supply portions provided in a plurality of in the width direction of the sintered bogie may be formed in a region where the temperature of the glowing layer is lower than 1200 캜, The supply amount of the gas and the supply time of the gas are individually adjusted.

Further, the oxygen blowing step of the sintering method according to another embodiment of the present invention is characterized in that the oxygen gas is blown into the sintered raw material placed on the sidewall-side end portion before the sintered raw material seated in the central portion of the sintered bogie .

In the sintering method according to another embodiment of the present invention, the oxygen gas is blown onto the upper glow layer on the basis of the middle of the height direction of the glow layer formed by sloping while the raw material of the sinter is burned , And the oxygen gas is injected more toward the uppermost portion in the height direction of the glowing layer.

In the oxygen blowing step of the sintering method according to another embodiment of the present invention, the velocity of oxygen blown into the raw material for sinter may be smaller than the sonic velocity.

Further, in the sintering method according to another embodiment of the present invention, when the thickness of the glowing layer formed by sloping while the raw material for sinter is burned is less than 1.0% of the total thickness of the sintered raw material, And is provided at a rate of 4.0% or more and less than 10% of the total amount of gas sucked.

Further, in the sintering method according to another embodiment of the present invention, when the thickness of the glowing layer formed by sloping the raw material for sinter is 1.0% or more and less than 2.5% of the total thickness of the raw material for sinter, The wind box is provided at 2.5% or more and less than 8.0% of the total amount of gas sucked by the wind box.

In addition, in the sintering method according to another embodiment of the present invention, when the thickness of the glowing layer formed by sloping while the raw material for sinter is burned is 2.5% or more of the layer thickness of the raw material for sinter, And more preferably 1.0% or more and less than 6.5% of the total amount of gas to be sucked.

The sintering method and the sintering method of the present invention have the effect of enabling the combustion to be activated by injecting oxygen into a portion where the heat of the interior of the sintering raw material layer is insufficient during the sintered light production step and the glowing layer is not uniformly formed.

Thus, the heat generating layer can be uniformly formed in the height direction of the sintering raw material, so that the quality of the produced sintered ores can be improved.

That is, in the upper layer of the sintered raw material, the thickness of the glowing layer required for sintering is sufficiently secured and the flame propagation speed is increased, thereby suppressing or preventing the decrease in the strength of the sintered ores due to the heat deficiency phenomenon.

Therefore, the process efficiency and productivity of the sintering operation can be improved.

1 shows a conventional sintering machine.
2 and 3 are front views showing the sintering machine of the present invention.
4 is a perspective view showing an oxygen supplier in the sintering machine of the present invention.
5 is a cross-sectional view showing an oxygen supply portion in the sintering machine of the present invention.
6A and 6B are graphs showing the temperature distribution according to the height of the sintering raw material formed by the conventional sintering machine and the sintering machine of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

The sintering method and the sintering method of the present invention relate to the invention for adjusting the formation of a glowing layer in which the sintering raw material (r) is burned to produce sintered ores, and the amount of heat inside the sintering raw material (r) The combustion can be activated by blowing oxygen to a portion where the glowing layer is not uniformly formed.

As a result, the heat generating layer can be uniformly formed in the height direction of the raw material for sinter (r) to improve the quality of the produced sintered ores.

That is, in the upper layer portion of the sintering raw material (r), the thickness of the glowing layer required for sintering is sufficiently secured and the flame propagation speed is increased, whereby the decrease in the strength of the sintered ores due to the insufficient heat can be suppressed or prevented.

2 and 3 are front views showing the sintering machine of the present invention. Figs. 6A and 6B show the temperature distributions of the conventional sintering machine and the sintering raw material r formed by the sintering machine according to the height Fig.

That is, FIG. 2 shows an embodiment in which the homogenizing unit 100 in the sintering apparatus of the present invention includes only the oxygen supplying unit 110, and FIG. 3 shows that in the sintering apparatus of the present invention, The fuel supply unit 120 and the fuel supply unit 110, respectively.

FIG. 6A shows the temperature distribution in the conventional sintering machine in which oxygen is not blown independently, and FIG. 6B shows the temperature distribution in the sintering machine of the present invention in which oxygen is blown independently.

2, 3 and 6A and 6B, a sintering machine according to an embodiment of the present invention includes a hopper portion 10 for supplying a raw material for sintering r and a vessel 10 for sintering and discharging the raw material s for sintering A transfer unit 40 located between the light units 60 and circulatingly moving the sintered bogie 50 on which the sintering raw material r is placed; A windbox portion 20 provided at the lower portion of the sintering bogie 50 and sucking the gas inside the sintering bogie 50 and a windbox portion 20 provided at a lower portion of the sintering bogie 50 for heating the sintering raw material r (Not shown) to supply the oxygen gas independently so as to be supplied to the region where the temperature is lower than 1200 ° C. and to include the glowing layer homogenizing unit 100 located behind the igniter 30 in the traveling direction of the sintering bogie 50 have.

The gaseous layer uniformity forming unit 100 of the sintering machine according to an embodiment of the present invention is disposed at the rear end of the ignition part 30 in the traveling direction of the sintered bogie 50, An oxygen supply unit 110 for independently supplying the oxygen gas to a region where the temperature is lower than 1200 DEG C and a gas supply unit 110 for supplying oxygen gas to the oxygen supply unit 110 at a rear end of the oxygen supply unit 110 in the traveling direction of the sintered bogie 50 And a fuel gas supply unit 120 for supplying the fuel gas.

That is, the present invention provides a configuration in which the glowing layer can be uniformly formed by independently blowing oxygen gas into a region where the temperature of the glowing layer is at least 1200 ° C.

The hopper 10, the windbox 20, the igniter 30, the feeder 40, the sintering ladle 50 ), A light-directing unit 60, and a duct unit 70.

First, the hopper 10, the wind box 20, the ignition chamber 30, the transfer unit 40, the sintered bogie 50, the light shading unit 60, and the duct unit 70 will be described. The hopper unit 10 includes a top light hopper 11 in which upper light is stored in the bottom of the sintering bogie 50 and a coke used as a solid fuel in an upper portion of the upper light, And a surge hopper 12 for storing a raw material mixture.

The sintering bogie 50 may be provided to receive the sintering material r and be movable in one direction. The transferring unit 40 may transfer a plurality of the sintering bogie 50 in the process direction The ignition part 30 may be provided on the upper side of the sintered bogie 50 and on one side of the surge hopper 12 in the traveling direction of the sintered bogie 50.

The ignition part 30 forms a starting point for burning the sintering raw material r by spraying a flame on the surface layer of the sintering raw material r in the sintering bogie 50.

The wind box portion 20 may be installed on the movement path of the sintered bogie 50 and may serve to suck the inside of the saddle bogie 50.

In addition, the sintering machine of the present invention may include a sintering raw material (r) in the sintered bogie (50), that is, a calorie regulator for controlling the heat quantity in the raw material layer, And a controller for controlling the operation of the calorie regulator by using the result detected by the detector.

The movement path of the sintered bogie 50 forms a closed loop such that the sintered bogie 50 rotates in an endless track manner and the upper side movement path of the closed loop moves the sintered bogie 50 Is a sintering section in which the sintering section is sintered and the sintering section of the sintering section 50 in which the sintered light having been sintered is discharged to the light distribution section 60 moves to the upper side movement path for the sintering process.

In this case, the upper light hopper 11, the surge hopper 12, and the ignition coil 30 are provided on the upper side movement path, and the wind box portion 20 is provided on the lower side of the upper side movement path, And sucks the inside of the sintered bogie 50 moving along the side movement path.

The sintered light that has been sintered in the sintered bogie 50 is discharged from the sintered bogie 50 in the course of the movement from the upper side movement path to the lower side movement path, Is located on the opposite side of the guide portion (30).

The sintering raw material r refers to a blend raw material supplied from the upper light provided from the upper light hopper 11 and the surge hopper 12 and is supplied after the sintering raw material r is charged into the sintering bogie 50 Is referred to as a raw material layer.

The upper light hopper 11 is provided at an upper portion of one side of the upper side movement path of the sintered bogie 50. In order to prevent the sintered raw material r formed at the bottom of the sintered bogie 50 from flowing out The upper light is charged. Here, the upper light is preferably sintered light having a particle size of about 8 to 15 mm among the sintered ores.

The surge hopper 12 is provided after the upper light hopper 11 in the traveling direction of the sintered bogie 50 so that the sintered raw material r for producing the sintered light in the sintered bogie 50 is sintered 50).

The sludge hopper 12 uniformly loads the sintering raw material r in the width direction of the sintered bogie 50 without any grain size and segregation and the grain size of the sintered bogie 50 is reduced in the depth direction of the sintering bogie 50, It is preferable to load it by segregation.

The ignition part 30 is provided after the surge hopper 12 in the traveling direction of the sintered bogie 50 so that the sintered raw material r is charged into the sintered bogie 50, To be ignited.

The wind box portion 20 sucks the inside of the sintered bogie 50 which is provided along the movement path of the sintered bogie 50, more specifically, below the upper side movement path and moves along the upper side movement path, The wind box part 20 may be provided between the ignition part 30 and the light shading part 60.

A duct unit 70 may be provided at an end of the wind box unit 20 and the duct unit 70 may include a duct 71, a dust collector 72, a chimney 73, have.

A blower 74 is installed at an end of the duct 71 to form a negative pressure inside the wind box portion 20 so that the inside of the sintered bogie 50 can be sucked. A dust collector 72 is provided in front of the windbox portion 74 so that impurities in the exhaust gas sucked through the wind box portion 20 can be filtered and discharged through the chimney 73. [

The homogeneous composition unit 100 independently blows oxygen into a portion of the glowing layer in which combustion is started by the ignition portion 30 at a temperature of at least 1200 ° C to induce a uniform composition of the glowing layer. That is, the oxygen gas is injected into the glowing layer separately from the oxygen and the fuel gas, which are mixed and injected.

For this purpose, the uniform composition unit 100 may include an oxygen supply unit 110 and a fuel gas supply unit 120.

The oxygen supply unit 110 functions to supply only oxygen, and the fuel gas supply unit 120 functions to supply the fuel gas. Here, the fuel gas supply unit 120 may supply the fuel gas mixed with oxygen, but the oxygen supply unit 110 supplies only oxygen.

That is, the region S for supplying only the oxygen gas is secured by the oxygen supply unit 110.

The principle that only the oxygen gas is supplied to the sintering raw material (r) layer to compensate the heat quantity of the portion where the heat quantity is insufficient in the glowing layer is the acceleration of the combustion by the oxygen gas.

In other words, by forming the oxygen gas at a higher concentration in the region where the heat quantity is insufficient, the oxidation of the raw material for sinter reacting with the oxygen gas is further promoted.

In addition, the oxygen supply unit 110 may include a nozzle member 111, a buffer member 112, and a hood member 113, which will be described later in detail with reference to FIG. 4 or FIG.

On the other hand, referring to FIGS. 6A and 6B, it can be seen that the effect of uniformly forming the heat generating layer in the case where only the oxygen gas is blown independently.

That is, FIG. 6A is a graph showing the relationship between the depth of the sintered raw material (r) layer at the center portion r1 and the side end portion r2 in the width direction of the sintered bogie 50 formed by the conventional sintering machine, And the temperature distribution is measured.

It can be seen that the center portion r1 and the side end portion r2 commonly form a heat-generating layer at a temperature much lower than 1200 deg. C, and the heat-generating layer at the side end portion r2, (r1), the temperature rise is found to be formed later.

When the rate of formation of the glowing layer and the temperature difference between the side end portion r2 and the center portion r1 occur, a difference in sintering time in the width direction of the sintering vehicle 50 occurs, and a difference in sintered light quality in the width direction is expected to occur .

As the depth of the sintered bogie 50 is increased, the glowing layer is enlarged and the region rises up to about 1200 DEG C, which is present at the central portion r1 in the width direction of the sintered bogie 50. At the side end portion r2, Is lower than that of the central portion r1.

That is, in the conventional sintering machine in which the oxygen gas is not blown independently, there is a problem of non-uniformity of the heat accumulation layer for each depth of the sintered bogie 50 as well as a problem of unevenness in the widthwise direction of the sintered bogie 50 It exists at the same time.

6B is a graph showing the relationship between the width of the sintered raw material layer (r) and the depth of the sintered raw material layer (r) at the center portion r1 and the side end portion r2 of the sintered bogie 50 formed by the sintering machine of the present invention, And the temperature distribution is measured.

The results shown in FIG. 6B are obtained when the oxygen gas is blown into the lower depth of the glowing layer (0 to 20% of the layer thickness) in the embodiment of the present invention.

The amount of oxygen gas blown at this time was 3.8% of the suction air volume of the wind box portion 20 and injected for 180 seconds. It can be confirmed that a glowing layer is formed at the same time in the sintering raw material r of the widthwise center portion r1 and the side end portion r2 of the sintered bogie 50 after injecting oxygen gas.

Particularly, it can be seen that the center portion r1 and the side end portion r2 are simultaneously formed at the time of forming the glow layer at the surface layer portion having a depth of 10% The time is also increased by more than three times compared with the conventional one.

Here, even if the temperature of the glowing layer does not reach 1200 ° C or higher, if the sintering is continued for 3 to 4 minutes or less at a temperature of 1100 ° C or more, it is expected that the sintering machine of the present invention can improve the quality of sintering have.

In addition, if the time for injecting oxygen into the side end portion r2 is earlier than the center portion r1, the recovery rate in the 10% surface layer portion region can be increased compared to the total posterior layer depth. do.

FIG. 4 is a perspective view illustrating an oxygen supply unit 110 in the sintering machine of the present invention. Referring to FIG. 4, the oxygen supply unit 110 of the sintering machine according to an embodiment of the present invention includes: And a plurality of sideways are provided in the width direction or provided on both lateral ends r2 of the sintered bogie 50 in the width direction.

The oxygen supply part 110 of the sintering machine according to an embodiment of the present invention is provided with a hood member 113 provided in the upper part of the sintered bogie 50 and a hood member 113 provided inside the hood member 113, A nozzle member 111 connected to the oxygen pipe 111a for spraying the oxygen gas on the upper surface of the raw material s and a buffer member connected to the oxygen pipe 111a for adjusting the pressure of the oxygen gas supplied thereto 112).

The hood member 113 of the sintering machine according to the embodiment of the present invention is characterized in that the lower end portion of the sintering stock 50 is provided with a higher portion of the sintering raw material r placed on the sintering bogie 50 and the sintering bogie 50 And a height difference between the upper surface of the first substrate and the upper surface of the second substrate is 10 cm or less.

The oxygen supply unit 110 may be installed at a position after the ignition unit 30 in the traveling direction of the sintered bogie 50 and may be installed on the entire widthwise side of the sintered bogie 50, It may be installed for a part.

In other words, the temperature of the glowing layer is generally lower than the central portion r1 at both ends r2 of the sintered bogie 50 in the width direction, and the supply of oxygen gas by the oxygen supplying portion 110 It is preferable that both side ends r2 in the width direction of the sintered bogie 50 are provided so as to be blown more than the center r1.

Particularly, the oxygen supply unit 110 may be provided to supply a plurality of hood members 113 with nozzle members 111 individually to supply oxygen gas to the hood members 113. In other words, the sintered bogie 50 may be provided so as to blow oxygen gas only to both lateral ends r2 of the sintered bogie 50, or to supply oxygen gas uniformly to the entire widthwise direction of the sintered bogie 50 It is.

4, the oxygen supply unit 110 is located above the sintering bogie 50, and the hood member 113 may be divided into the number of the divided gates of the surge hopper 12. As shown in FIG. In other words, it is possible to prevent the oxygen gas injected from the nozzle member 111, which supplies the oxygen gas, from diffusing to neighbor after forming the independent space by providing the partition for each hood member 113 of each divided section.

One or more nozzle members 111 may be provided in the independent space of the hood member 113, and the number of the nozzle members 111 may be varied according to the spray angle.

The height at which the hood member 113 of the oxygen supply unit 110 is provided is higher than the height of the lower end of the hood member 113 and the upper surface of the sintered raw material r when the raw surface layer portion is higher than the side wall of the sintered bogie 50, It is preferable that the sidewall 50 is provided at an interval of 10 cm or less with respect to the lower end of the hood member 113 and the sidewall of the sintered bogie 50 when the sidewall of the sintered bogie 50 is high Do. This is to minimize the influence of the lateral wind introduced from the outside.

On the other hand, the injection angle a for supplying the oxygen gas in the nozzle member 111 is set in accordance with the number of division of the nozzle member 111 (the number of the divided gates of the surge hopper 12 or more) desirable. A detailed description thereof will be given later with reference to Fig.

FIG. 5 is a cross-sectional view illustrating an oxygen supply unit 110 in the sintering machine of the present invention. Referring to FIG. 5, the nozzle member 111 of the sintering machine according to an embodiment of the present invention includes: And the height h of the upper surface is provided so as to satisfy at least h = W / (2tan (0.5a)). Here, W is the width (W) of the unit hood 113a of the hood member 113 to which the nozzle member 111 is provided, a is the spray angle of the oxygen gas injected from the nozzle member 111 )to be.

That is, the height of the nozzle member 111 is preferably such that the supplied oxygen gas is sprayed over the entire surface of the raw material for sintering. The spray angle a of the injected oxygen gas, the width of the hood member 113 W), and the like.

In other words, when the specified injection angle a and the width W of the hood member 113 are fixed, the height of the nozzle member 111 is adjusted so that the oxygen gas As shown in Fig.

The distance between the nozzle member 111 and the surface layer of the sintered raw material r is different depending on the shape of the nozzle member 111. The high temperature refractory lump, In order to prevent the nozzle member 111 from coming into contact with the nozzle member 111 to be sprayed.

The sintering method according to another embodiment of the present invention includes a charging step of supplying a raw material for sintering r to a sintering truck 50 circulatingly moved in the hopper part 10, A sintering step of sintering the raw material for sintering r and a sintering step for sintering the raw material s for sintering by sucking the gas inside the sintering bogie 50 by a wind box provided below the sintering bogie 50, The oxygen supply part 110 located at the rear end of the ignition part 30 in the traveling direction of the sintered bogie 50 independently feeds the oxygen gas so that the temperature of the glow layer Process.

That is, it is possible to uniformly form the heat-generating layer in the height direction of the sintering raw material (r) by further including an oxygen blowing step for blowing only oxygen gas.

Here, the ignition step is performed by ignition of the raw material for sinter (r) in the ignition part (30), and the firing step is performed by forming a heat generating layer at the starting point of ignition in the ignition part (30) You can add gas.

However, in the present invention, independently of the fuel gas, oxygen gas is blown independently to form a uniform heat-generating layer.

In other words, the oxygen blowing process may be characterized in that the oxygen gas is injected in a region where the temperature is lower than 1200 ° C because the additional heat is unnecessary when the temperature is 1200 ° C or higher in the heat generating layer, The oxygen gas is blown to the point, thereby promoting the oxidation reaction so that the temperature of the glowing layer can be further increased.

In addition, in the sintering method according to another embodiment of the present invention, each of the oxygen supply units 110 provided with a plurality of oxygen supply units in the width direction of the sintered bogie 50 is heated at a temperature of 1200 캜 The supply amount of the oxygen gas and the supply time point of the oxygen gas are separately adjusted and supplied.

That is, by setting the oxygen gas to be injected differently in the width direction of the sintered bogie 50, the width direction of the glowing layer can be uniformly formed.

It is generally preferable that the sintering raw material r is burned faster than the side end portion r2 in the width direction center portion r1 of the sintered bogie 50 so that the oxygen gas is more preferably supplied to the side end portion r2.

Alternatively, the oxygen blowing step of the sintering method according to another embodiment of the present invention is characterized in that the oxygen gas is supplied to the sintered bogie 50 side end portion (s) before the sintered raw material r placed on the central portion r1 of the sintered bogie 50 (r) settled in the sintered body (r2).

That is, the formation of the glowing layer in the sintering raw material r placed on the side end portion r2 of the sintering bogie 50 is activated to uniformize the formation of the width direction heat generating layer of the sintering bogie 50. [

Meanwhile, in the sintering method according to another embodiment of the present invention, the oxygen introduction step may be performed such that the sintering raw material (r) is burned and the oxygen gas is supplied onto the upper glowing layer with reference to the center in the height direction of the glowing layer And further blowing the oxygen gas toward the uppermost portion of the heat generating layer in the height direction.

That is, by supplying oxygen gas to the upper glowing layer in which the glowing layer is relatively less, it is induced to form the glowing layer more or more thickly.

In addition, since the uppermost portion of the glowing layer forms the thinnest glow layer at the starting point of ignition, the most oxygen gas is supplied to the uppermost portion of the glow layer and the amount of continuous oxygen gas supply is adjusted to provide the glow layer. Uniform formation can be confirmed.

The oxygen blowing step of the sintering method according to another embodiment of the present invention may be characterized in that the velocity of oxygen blown into the raw material for sintering r is smaller than the sonic velocity.

That is, by injecting the oxygen gas to a volume smaller than the sonic speed so that choking does not occur during the blowing of the oxygen gas, it is possible to prevent the problem that the pressure in the nozzle member 111, which injects the oxygen gas, .

On the other hand, the supply amount of the oxygen gas in the sintering method according to another embodiment of the present invention is such that when the thickness of the glowing layer formed by sloping while burning the sintering raw material (r) is less than 1.0% Of the total amount of gas sucked by the wind box is not less than 4.0% and less than 10%.

The supply amount of the oxygen gas in the sintering method according to another embodiment of the present invention is such that the thickness of the glowing layer formed by sloping while the sintering raw material (r) is burned is 1.0% or more %, The wind box is provided at not less than 2.5% and not more than 8.0% of the total gas amount sucked by the wind box.

The supply amount of the oxygen gas in the sintering method according to another embodiment of the present invention is such that when the thickness of the glowing layer formed by sloping while the sintering raw material r is burned is 2.5% or more of the layer thickness of the sintering raw material r Of the total amount of gas sucked by the wind box is less than 1.0% and less than 6.5%.

This indicates the ratio of the oxygen gas most preferably supplied depending on the supply amount of the oxygen gas and the position of the stacking of the sintering raw material (r).

10: hopper part 11: upper optical hopper
12: Surge hopper 20: Wind box part
30: ignition part 40: transfer part
50: sintering ladle 60:
70: duct unit 71: duct
72: dust collector 73: chimney
74: blower 100: uniform composition unit
110: oxygen supply unit 111: nozzle member
112: buffer member 113: hood member
120: fuel gas supply unit

Claims (10)

A transfer unit positioned between the hopper unit for supplying the sintering raw material and the light emitting unit for sintering and discharging the sintering raw material and circulatingly moving the sintering bogie on which the raw material for sinter is placed;
An ignition part positioned behind the hopper part in the sintering vehicle traveling direction;
A wind box portion provided at a lower portion of the sintering truck to suck gas inside the sintering truck; And
A glowing layer homogenizing composition unit which supplies oxygen gas independently so that the temperature of the glowing layer in which the raw material for sinter is burned is lower than 1200 ° C and which is located behind the ignition in the direction of advance of the sintering vehicle;
≪ / RTI > The method according to claim 1,
The glowing layer homogenizing composition unit may comprise:
An oxygen supply unit for supplying the oxygen gas independently to a region located at the rear end of the igniter in the traveling direction of the sintering vehicle and having a temperature of the glowing layer of less than 1200 ° C; And
A fuel gas supply unit located at a rear end of the oxygen supply unit in the sintering vehicle traveling direction so as to be provided independently of the oxygen supply unit and supplying the fuel gas;
≪ / RTI > 3. The method of claim 2,
Wherein a plurality of the oxygen supply units are provided in the width direction of the sintered bogie or are provided at both side ends in the width direction of the sintered bogie. 3. The method of claim 2,
The oxygen supply unit includes:
A hood member provided on an upper portion of the sintered bogie;
A nozzle member provided inside the hood member and connected to the oxygen pipe to spray the oxygen gas on the upper surface of the raw material for sinter; And
A buffer member connected to the oxygen pipe for adjusting the pressure of the oxygen gas supplied thereto;
≪ / RTI > 5. The method of claim 4,
Wherein the nozzle member is provided such that a height (h) at an upper surface of the raw material for sinter at least satisfies the following formula.
h = W / (2 < / RTI > (0.5a))
Here, W is a unit hood width (W) of the hood member provided with the nozzle member, and a is an injection angle (a) of the oxygen gas injected from the nozzle member. A charging step of supplying a raw material for sintering with a sintered bogie circulating in the hopper part;
An ignition step of igniting the surface of the raw material for sinter;
A sintering process in which a windbox provided at a lower portion of the sintering bogie sucks gas inside the sintering bogie to burn the sintering raw material; And
An oxygen blowing step of independently supplying oxygen gas in an oxygen supply portion located at a downstream end of the ignition in the sintering vehicle traveling direction so that the temperature of the glowing layer in which the raw material for sinter is burned is supplied to a region of less than 1200 ° C;
≪ / RTI > The method according to claim 6,
Wherein each of the oxygen supplying portions provided in a plurality of in the width direction of the sintered bogie is adjusted by individually adjusting the supply amount and the supply timing of the oxygen gas to a region where the temperature of the glowing layer is lower than 1200 캜 . 8. The method of claim 7,
Wherein the oxygen blowing step blows oxygen gas into the sintered raw material that is seated on the sidewall-side end portion of the sintered sidewall prior to the sintered raw material seated on the center portion of the sintered oval. 8. The method of claim 7,
Wherein the oxygen blowing step blows the oxygen gas onto the upper glowing layer with reference to the center of the glowing layer formed in a slanting manner while the raw material for sinter is burned,
And the oxygen gas is injected more toward the uppermost portion in the height direction of the heat generating layer. 8. The method of claim 7,
Wherein the oxygen blowing step injects the oxygen to be blown into the sintering raw material at a speed lower than a sonic speed.
KR1020140181840A 2014-12-16 2014-12-16 Sintering apparatus and sintering method KR20160089552A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020140181840A KR20160089552A (en) 2014-12-16 2014-12-16 Sintering apparatus and sintering method
BR112017012466A BR112017012466A2 (en) 2014-12-16 2015-09-30 sintering machine and sintering method
CN201580068926.7A CN107109518A (en) 2014-12-16 2015-09-30 Sintering machine and sintering method
JP2017529987A JP2018503046A (en) 2014-12-16 2015-09-30 Sintering machine and sintering method
PCT/KR2015/010309 WO2016099010A1 (en) 2014-12-16 2015-09-30 Sintering machine and sintering method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140181840A KR20160089552A (en) 2014-12-16 2014-12-16 Sintering apparatus and sintering method

Publications (1)

Publication Number Publication Date
KR20160089552A true KR20160089552A (en) 2016-07-28

Family

ID=56126850

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140181840A KR20160089552A (en) 2014-12-16 2014-12-16 Sintering apparatus and sintering method

Country Status (5)

Country Link
JP (1) JP2018503046A (en)
KR (1) KR20160089552A (en)
CN (1) CN107109518A (en)
BR (1) BR112017012466A2 (en)
WO (1) WO2016099010A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102043561B1 (en) * 2018-06-15 2019-11-12 주식회사 포스코 Motor and sintering machine having the same

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109520302A (en) * 2018-12-29 2019-03-26 广州薪光合环保技术有限公司 Sintering furnace
CN109959260A (en) * 2019-04-29 2019-07-02 山东凯莱特冶金装备有限公司 It is sintered lower negative pressure igniter and method
CN110343853A (en) * 2019-08-07 2019-10-18 马鞍山钢铁股份有限公司 A kind of sintered heat insulating device, sintering machine and its sintering method
CN110726306B (en) * 2019-10-22 2021-03-30 湖南理工学院 High-utilization-rate belt type sintering machine
CN113969345B (en) * 2020-07-23 2023-07-25 中冶长天国际工程有限责任公司 Steam blowing cooling device and method for sintering machine
CN113969346B (en) * 2020-07-23 2023-03-24 中冶长天国际工程有限责任公司 Sintering machine with gas and steam coupling
CN112410543A (en) * 2020-12-07 2021-02-26 许玉蕊 Sintering oxygen enrichment device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51147402A (en) * 1975-06-12 1976-12-17 Mitsubishi Heavy Ind Ltd A sintering process and sintering machine having split type firing fur nace
JPS62149824A (en) * 1985-12-23 1987-07-03 Kobe Steel Ltd Method for controlling flow rate of oxygen in sintering machine
JPH0273924A (en) * 1988-09-09 1990-03-13 Nippon Steel Corp Oxygen-enriching operation in sintering machine
JPH05195091A (en) * 1992-01-22 1993-08-03 Sumitomo Metal Ind Ltd Manufacture of sintered ore
JP3395505B2 (en) * 1996-02-26 2003-04-14 日本鋼管株式会社 Operating method of endless mobile sintering machine
JP5458560B2 (en) * 2008-12-03 2014-04-02 Ｊｆｅスチール株式会社 Sintering machine
JP5585503B2 (en) * 2010-03-24 2014-09-10 Ｊｆｅスチール株式会社 Method for producing sintered ore
JP5825478B2 (en) * 2011-09-07 2015-12-02 Ｊｆｅスチール株式会社 Sintering machine
KR101356054B1 (en) * 2011-12-22 2014-01-28 주식회사 포스코 Apparatus for sintering iron ore
JP6024890B2 (en) * 2012-10-24 2016-11-16 Ｊｆｅスチール株式会社 Method and apparatus for supplying gaseous fuel to a sintering machine
KR101461580B1 (en) * 2013-12-23 2014-11-17 주식회사 포스코 Apparatus for manufacturing sintered ore and method for manufacturing sintered ore using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102043561B1 (en) * 2018-06-15 2019-11-12 주식회사 포스코 Motor and sintering machine having the same

Also Published As

Publication number Publication date
WO2016099010A1 (en) 2016-06-23
JP2018503046A (en) 2018-02-01
BR112017012466A2 (en) 2017-12-26
CN107109518A (en) 2017-08-29

Similar Documents

Publication Publication Date Title
KR20160089552A (en) Sintering apparatus and sintering method
KR101665066B1 (en) Apparatus and Method for Manufacturing Sintered Ore
JP6415714B2 (en) Sintering apparatus and sintering method
KR101461580B1 (en) Apparatus for manufacturing sintered ore and method for manufacturing sintered ore using the same
JP2010126773A (en) Method for producing sintered ore
KR101766672B1 (en) Apparatus and Method for Manufacturing Sintered Ore
CN109564065A (en) Agglomerating plant and the method for manufacturing sinter using the agglomerating plant
JP7099258B2 (en) Method of manufacturing sinter using DL type sinter and DL type sinter
JP6406169B2 (en) Method for producing sintered ore
KR101987939B1 (en) Sintering plant and method for manufacturing sintered ore
KR101719518B1 (en) Apparatus and Method for Manufacturing Sintered Ore
JP2002121621A (en) Method for producing sintered ore and dl type sintering machine
KR101818512B1 (en) sintering apparatus and method for manufacturing sintered ore of using it
KR20180047213A (en) sintering apparatus and method for manufacturing sintered ore of using it
KR101998754B1 (en) Sintering apparatus
JP7196462B2 (en) Manufacturing method of sintered ore using Dwight Lloyd type sintering machine
KR101241324B1 (en) Method for reducing fine coke particles in cokes oven gas
JP7311784B2 (en) Method for producing sintered ore
JP7311783B2 (en) Method for producing sintered ore
KR101892147B1 (en) Apparatus for manufacturing sintered ore and method thereof
KR101892148B1 (en) Apparatus for manufacturing sintered ore and method thereof
KR101977356B1 (en) Charging apparatus for raw material
KR102032755B1 (en) The method for producing sintered ore by providing liquid fuel and apparatus thereof
JP2010126774A (en) Method for manufacturing sintered ore
KR101705055B1 (en) Processing method for raw material

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
AMND Amendment
E601 Decision to refuse application
AMND Amendment
J201 Request for trial against refusal decision
J301 Trial decision

Free format text: TRIAL NUMBER: 2016101004316; TRIAL DECISION FOR APPEAL AGAINST DECISION TO DECLINE REFUSAL REQUESTED 20160722

Effective date: 20180928