KR102249921B1 - Manufacturing method of sintered ore, and manufacturing apparatus of sintered ore - Google Patents

Abstract

The method for manufacturing a sintered ore according to an embodiment of the present invention includes the steps of preparing a sintered blended raw material including iron ore and a binder, and charging the sintered blended raw material into a sintering cart, and separately putting a powder-type binder on the sintering cart. And sintering the sintering material, and with respect to 100% by weight of the total amount of the binder included in the sintered blending raw material and the binder added to the upper portion of the sintering cart, 4 to 24% by weight of the binder is separately added to the upper portion of the cart in powder form, The remaining binder is used as a raw material for sintering.
An apparatus for producing a sintered ore according to another embodiment of the present invention includes a sintering cart, an upper light providing unit for charging an upper light to an inner lower part of the sintering cart, a blending material providing unit for charging a blended material onto the charged upper light, and And a binder providing unit for uniformly cutting out the binder material in the width direction of the sintering cart over the charged blending material.

Description

A sintered ore manufacturing method, and a sintered ore manufacturing apparatus TECHNICAL FIELD OF THE INVENTION

It relates to a sintered ore manufacturing method, and a sintered ore manufacturing apparatus.

Charged raw materials used in the blast furnace are largely classified into raw materials such as sintered ore, sized ore, and pellets, and coke for securing air permeability in the blast furnace and reducing iron ore. Among them, sintered ore is the core raw material that not only uses the most, but also has the cheapest price. Therefore, various studies are being conducted to increase the ratio of its use.

Accordingly, the sintering machine for the manufacture of iron ore sintered ore gradually increased the effective burn area and became large. Using these large sintering machines, auxiliary materials such as iron ore, limestone, quicklime, silica and serpentine, semi-ore, coke, and anthracite were used. A large amount of iron ore sintered ore is manufactured using a binder and supplied to the blast furnace.

Due to the nature of the sintering operation in which air at room temperature is sucked downward in the manufacture of ordinary sintered ore, heat is rapidly transferred to the lower part of the sintered bed without sufficiently securing the amount of heat required for sintering, resulting in a lack of heat in the upper part of the sintered bed. And, as the amount of heat accumulates toward the bottom, over-melting occurs, resulting in a decrease in the sintered ore recovery rate, and causing non-uniform firing.
Japanese Unexamined Patent Application Publication No. 2000-160261 (2000.06.13.)
Korean Patent Application Publication No. 10-2004-0042543 (2004.05.20.)
Korean Patent Application Publication No. 10-2003-0097542 (2003.12.31.)

The present invention provides a sintered ore manufacturing method capable of improving the recovery rate of sintered ore by solving the problems of conventional sintered ore manufacturing, and inducing uniform sintering by uniformly distributing heat in the upper and lower layers of the sintered bed, and an apparatus for manufacturing sintered ore.

A method for manufacturing a sintered ore according to an embodiment of the present invention comprises the steps of preparing a sintered blended raw material including iron ore and a binder, and charging the sintered blended raw material to a sintering cart, and separately putting a powder-type binder on the top of the sintering cart. And sintering.

With respect to the binder contained in the sintered blended raw material and 100% by weight of the total amount of the binder added to the top of the sintering cart, 4 to 24 wt% of the binder is separately added to the top of the cart in the form of powder, and the remaining binders are used as the sintered blending material. It can be.

With respect to the binder contained in the sintered blended raw material and 100% by weight of the total amount of the binder added to the top of the sintering cart, 9 to 15 wt% of the binder is separately added to the top of the cart in powder form, and the remaining binders are used as the sintered blending material. It can be.

By controlling the amount of the binder contained in the sintered blending raw material and the binder added to the upper portion of the sintering cart, by controlling the distribution of the heat source inside the sintering cart, the temperature difference between the upper and lower portions of the sintering cart is reduced and uniformly It may be firing.

In the step of charging the sintered blended raw material into a sintering cart, and separately injecting a powder-type binder into the upper portion of the sintering cart and sintering, the binder introduced into the upper portion of the sintering cart during the sintering process provides a heat source to the upper portion of the sintering cart, and The temperature rise of the middle and lower portions of the sintering cart is controlled by the content of the binder contained in the sintering cart, thereby reducing the temperature difference between the upper and lower portions of the sintering cart and firing uniformly.

The powder-shaped binder may be uniformly injected in the width direction of the sintering cart on the top of the sintering cart.

The binder introduced into the upper portion of the sintering truck may be selected from the group including CDQ Dust (Coke Dry Quenching Dust), powder coke, anthracite coal, and combinations thereof.

The binding material added to the upper portion of the sintering cart may be CDQ Dust (Coke Dry Quenching Dust).

The binder introduced into the upper portion of the sintering cart may have a particle size of 3 mm or less.

The binder added to the upper portion of the sintering cart may have a particle size greater than 0 and less than or equal to 1 mm.

A sintered ore manufacturing apparatus according to another embodiment of the present invention includes a sintering cart, an upper light providing unit for charging an upper light to an inner lower part of the sintering cart, a blending material providing unit for charging a blended material onto the charged upper light, and the It includes a binder providing unit for uniformly cutting out the binder material in the width direction of the sintering cart over the charged blending material.

Based on 100% by weight of the total bonding material used in the manufacture of the sintered ore, the bonding material cut out from the bonding material providing unit may be 4 to 24% by weight.

The bonding material providing unit may include a storage unit in which the bonding material is stored, and a cutout portion connected to a lower portion of the storage unit and cutting the bonding material into the sintering cart.

The storage unit is provided with an internal space, the hopper body in which the binder is stored, the binder is connected to the upper part of the hopper body, the binder pressure conveying line from which the binder is supplied, and the upper part of the hopper body, and the storage part It may include a gas discharge line for discharging the gas inside.

The storage unit may further include a leveler for measuring the loading degree of the binder loaded in the hopper body, and a load cell for measuring the weight of the binder loaded in the hopper body.

The storage unit may further include a vibrator connected to the hopper body to vibrate the hopper body.

The cut-out portion is in communication with the lower portion of the hopper body, the cut-out body from which the binder is discharged, a first valve disposed at an upper end of the cut-out body, and

It may be positioned below the first valve and may include a second valve for quantitatively discharging the binder through rotation.

The second valve may include a rotating roll rotating about a horizontal axis connected to the cutout portion, and protrusions formed in an even number along an outer circumferential surface of the rotating roll and spaced at equal intervals from each other.

When a virtual line connecting the first protrusion, which is one of the even-numbered protrusions, and the second protrusion formed at a position opposite to the first protrusion forms a horizontal plane perpendicular to the horizontal axis, the inside of the cut-out body is the horizontal plane It may be divided into upper and lower portions based on.

A discharge port through which the binder is discharged is formed at a lower end of the cut-out body, and the cut-out part may further include a third valve formed in the discharge port to control the quantitative discharge of the binder.

The cut-out portion may further include a bonding material swash plate positioned below the cut-out body and guiding the cut-out bonding material to the sintering cart.

The blended material providing unit is connected to a surge hopper in which the blended raw material is stored, a drum feeder that is connected to a lower end of the surge hopper, and discharges the blended raw material to the sintering cart, and is located under the drum feeder, of the sintering cart. Based on the moving direction, it may include a blending material swash plate positioned at the rear of the binder swash plate and guiding the discharged blending material to the sintering cart.

The blended raw material providing unit may further include a cut-off plate positioned in front of the swash plate of the binder based on the moving direction of the sintering cart to planarize the charge charged to the sintering cart.

The width of the cutout portion may be formed to have the same length as the width of the sintering cart.

In the method of manufacturing a sintered ore according to an embodiment of the present invention, a binder is added to the upper layer of the sintered bed in the form of powder to supply a insufficient heat source to the upper layer of the sintered bed, and the amount of the binder contained in the sintered blended material is reduced to heat the lower layer of the sintered bed. By reducing the over-melting phenomenon caused by accumulation, it is possible to improve the recovery rate of the sintered ore.

In addition, by using the binder providing unit according to another embodiment of the present invention, the binder powder is uniformly distributed on the top of the sintering cart, thereby improving the sintered ore recovery rate and improving the quality of the sintered ore.

1 is a schematic diagram of a method of manufacturing a sintered ore according to an embodiment of the present invention.
2 is a view showing the degree of heat accumulation inside the sintered bed according to the moving direction of the sintering cart according to the conventional sintered ore manufacturing method.
3 is a view showing a degree of heat accumulation inside a sintered bed according to a moving direction of a sintering cart in a method of manufacturing a sintered ore according to an embodiment of the present invention.
4 is a schematic diagram of an apparatus for manufacturing a sintered ore according to an embodiment of the present invention.
5 is a schematic diagram of a bonding material providing unit according to an embodiment of the present invention.
6 is an enlarged view of a cutout portion of the bonding material providing unit according to an embodiment of the present invention.
7 is an enlarged view of a third valve of the bonding material providing unit according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the scope of the claims to be described later.

In this specification, terms such as first, second and third are used to describe various parts, components, regions, layers, and/or sections, but are not limited thereto. These terms are only used to distinguish one part, component, region, layer or section from another part, component, region, layer or section. Accordingly, a first part, component, region, layer or section described below may be referred to as a second part, component, region, layer or section without departing from the scope of the present invention.

In the present specification, when a certain part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

In this specification, the terminology used is only for referring to specific embodiments and is not intended to limit the present invention. Singular forms as used herein also include plural forms unless the phrases clearly indicate the opposite. As used in the specification, the meaning of "comprising" specifies a specific characteristic, region, integer, step, action, element and/or component, and the presence of another characteristic, region, integer, step, action, element and/or component, or It does not exclude additions. Also, the singular form includes the plural form unless specifically stated in the text.

When a part of a layer, film, region, plate, etc. is said to be "above" or "on" another part, this includes not only the case where the other part is "directly above", but also the case where there is another part in the middle. In addition, throughout the specification, the term "on" means that it is located above or below the target part, and does not necessarily mean that it is located above or below the direction of gravity.

All terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms defined in a commonly used dictionary are additionally interpreted as having a meaning consistent with the related technical literature and the presently disclosed content, and are not interpreted in an ideal or very formal meaning unless defined. For example, blending is used interchangeably with blending.

Thus, in some embodiments, well-known techniques have not been described in detail in order to avoid obscuring interpretation of the present invention.

Sinter ore manufacturing method

1 schematically shows a method of manufacturing a sintered ore according to an embodiment of the present invention.

The method for manufacturing a sintered ore according to an embodiment of the present invention comprises the steps of preparing a sintered blended material including iron ore and a binder, and charging the sintered blended material to a sintering cart, and separately inputting a powder-type binder on the top of the sintering cart. And sintering.

By separately inputting and sintering a binder in the form of a powder on the top of the sintering truck, an additional heat source is supplied to the upper layer of the sintered bed to solve the lack of heat in the upper layer of the sintered bed, and the recovery rate of the sintered ore of the upper layer may be improved.

For 100% by weight of the binder contained in the sintered blending material and the total amount of the binder added to the sintering cart top, 4 to 24 wt% of the binder is separately added to the top of the cart in powder form, and the remaining binders are used as the sintered blending material. It can be.

The amount of the binder used in the sintered blended material is relatively reduced compared to the conventional sintered blended material, so that the problem of over-melting due to the accumulation of excess calories under the sintering bed during the sintering process can be solved, and the recovery rate of sintered ore can be improved. .

As a result, by introducing an additional heat source to the top of the sintering bed, insufficient heat is supplied to the upper layer, and by reducing the amount of the binder used in the sintered blended material to reduce the heat accumulation in the lower part of the sintering bed, the heat amount of the upper and lower layers of the sintered bed is appropriate. By controlling and firing uniformly across the sintered bed, it is possible to improve the sintered ore recovery rate and reduce the sintered binder ratio.

The amount of the binder separately added to the upper portion of the sintering cart may be 4 to 24% by weight based on 100% by weight of the binder included in the sintered blending material and the total amount of the binder added to the upper portion of the sintering cart. Specifically, it may be 4 to 15% by weight, 9 to 24% by weight, or 9 to 15% by weight. If the amount of the upper-input binder is too large, an undercalcination phenomenon may occur in the upper layer of the sintered bed, and a reduction in the recovery rate of the sintered ore and the quality of the sintered ore may occur. When the amount of the binder to be input is too small, the increase in the recovery rate of the sintered ore may be insignificant because the supply of the amount of heat to the upper layer of the sintering bed is insufficient.

By controlling the amount of the binder included in the sintered blended raw material and the binder added to the top of the sintering truck, the distribution of heat sources inside the sintering truck is controlled, thereby reducing the temperature difference between the top and the bottom of the sintering truck to achieve uniform firing. It is possible to induce, and as a result, it is possible to improve the recovery rate of the sintered ore and improve the quality of the sintered ore.

Specifically, in the sintering process, the bonding material injected into the upper portion of the sintering truck provides a heat source to the top of the sintering truck, and the temperature increase in the middle and lower portions of the sintering truck is controlled by the content of the bonding material included in the sintered blended material. And uniform firing by reducing the temperature deviation of the lower portion.

The powder-shaped binder may be uniformly injected in the width direction of the sintering cart on the top of the sintering cart. It is possible not only to reduce the temperature deviation of the upper and lower portions of the sintering cart, but also to reduce the temperature deviation of the upper layer of the sintering cart, thereby improving the recovery rate of sintered ore through uniform firing.

The binder introduced into the upper portion of the sintering cart may be selected from the group including dry cooling coke dust (Coke Dry Quenching Dust, hereinafter referred to as CDQ Dust), powder coke, anthracite coal, and combinations thereof. In this case, a heat source can be effectively supplied to the top of the sintering cart.

The recovery rate of the sintered ore may vary depending on the particle size characteristics and combustion behavior of the binder introduced on the top of the sintering truck.

Specifically, the binder added to the upper portion of the sintering cart may be CDQ Dust (Coke Dry Quenching Dust).

In the case of CDQ Dust (Coke Dry Quenching Dust), compared to powdered coke and anthracite, the density is smaller and the combustion speed is faster, so even if the same ratio is added to the upper layer of the sintering bed, it can effectively supply a heat source to the upper layer of the sintered bed.

The binder introduced into the upper portion of the sintering cart may have a particle size of 3 mm or less. Specifically, the particle size may be greater than 0 and 1 mm or less. When the particle size of the binder is too large, there is a problem that it is difficult to uniformly distribute when added to the upper layer of the sintered bed.

FIG. 2 is a diagram showing the heat scale inside the sintered bed according to the moving direction of the sintering cart according to the conventional sintered ore manufacturing method.

FIG. 3 is a diagram illustrating a heat scale inside a sintered bed according to a moving direction of a sintering cart in a method of manufacturing a sintered ore according to an embodiment of the present invention.

Referring to FIG. 2, since the amount of the binder contained in the conventional sintered blended material is large, it can be seen that excessive heat accumulates in the lower layer of the sintering bed as sintering proceeds along the moving direction of the sintering truck.

On the other hand, referring to FIG. 3, in the case of an embodiment of the present invention, since the amount of the binder contained in the sintered blended material is relatively small, the amount of heat accumulated in the lower layer of the sintered bed as sintering proceeds along the moving direction of the sintering cart. It can be seen that there are relatively few. Therefore, in the case of the method of manufacturing the sintered ore according to an embodiment of the present invention, it is possible to improve the recovery rate of the sintered ore by uniform firing.

Hereinafter, an apparatus for manufacturing a sintered ore according to another embodiment of the present invention will be described, and a description of a portion overlapping with that described above will be omitted.

Sintered ore manufacturing equipment

The apparatus for manufacturing a sintered ore according to another embodiment of the present invention includes a sintering cart 100, an upper light providing unit 200 for charging upper light to an inner lower part of the sintering cart 100, and mixing raw materials over the charged upper light. A blending material providing unit 300 to be charged, and a binder providing unit 400 for uniformly cutting out a binder material in the width direction of the sintering cart 100 over the charged blending material.

The bonding material providing unit 400 uniformly cuts out the bonding material in the width direction of the sintering cart 100, thereby supplying a uniform heat source to the upper layer of the sintered bed, thereby improving the sintered ore recovery rate.

The binder providing unit 400 is located in front of the blended material providing unit 300 based on the moving direction of the sintering cart 100, and the binder may be cut out over the charged blending material. Specifically, it may be located between the blending raw material providing unit 300 and the cut-off plate 340.

The bonding material providing unit 400 includes a storage unit and a cutout unit.

A binder is stored in the storage unit.

The cutout part quantitatively cuts out the bonding material with the sintering cart 100.

The storage unit includes a hopper body 411, a bonding material pressure delivery line, and a gas discharge line 413.

A binder is stored in the hopper body 411, and a binder is pressurized to the hopper body 411 through a binder pressure feeding line.

The gas discharge line 413 is for discharging the gas inside the hopper body 411.

The storage unit may further include a leveler 416 and a load cell 415.

The leveler 416 measures the loading degree of the binder in the hopper body 411.

The load cell 415 measures the amount of the bonding material charged into the hopper body 411.

The storage unit may further include a vibrator 414.

The vibrator 414 vibrates the hopper body 411 to evenly distribute the binder charged in the hopper body 411.

The cutout may include a cutout body 421, a first valve 422, and a second valve.

The cut-out body 421 discharges the bonding material.

The first valve 422 stores a binder in the hopper body 411 by closing the valve at the bottom of the hopper body 411, and opens the valve when necessary to transfer the binder stored in the hopper body 411 to a second valve. Transfer. The first valve 422 may be a butterfly valve, and may be opened or closed as the disk rotates about a transverse axis.

The second valve quantitatively discharges the binder supplied through the first valve 422. The second valve may be a rotary valve, and the space between the protrusion 425 and the cut-out body 421, or the rotation roll 424 and the cut-out body while the rotation roll 424 rotates around the horizontal axis 423 The binder may be discharged quantitatively through the space between the 421.

The second valve may include a rotary roll 424 and a protrusion 425 formed to be spaced apart from each other at equal intervals along the outer peripheral surface of the rotary roll 424.

A virtual line connecting the first protrusion 425, which is any one of the even-numbered protrusions 425, and the second protrusion formed at a position opposite to the first protrusion, is orthogonal to the horizontal axis 423 to form a horizontal plane. In this case, the inside of the cut-out body 421 may be divided into upper and lower portions based on the horizontal plane.

Specifically, the horizontal plane is a plane consisting of a horizontal axis 423 that is two straight lines and a virtual line, and the horizontal plane may be a plane in equilibrium with the ground.

When the horizontal axis 423 and the virtual line form a horizontal plane, the gap between the end of the first protrusion and the inner surface of the cut-out body 411 does not allow downward movement of the binder, and at the same time, the end of the second protrusion and the cut-out body ( The gap between the inner surfaces of 411) may not allow downward movement of the binder.

When the rotating roll 424 continues to rotate and the horizontal axis 423 and the virtual line no longer form a horizontal plane, the gap between the end of the first protrusion and the inner surface of the cut-out body 411 moves downward of the binder. And, at the same time, a gap between the end of the second protrusion and the inner surface of the cut-out body 411 may allow downward movement of the binder.

By the same principle as described above, the binding material can be quantitatively cut out by the operation of the second valve, formed in an even number, by adjusting the spacing of the projections 425 formed at equal intervals or adjusting the rotation speed of the rotary roll 424 , It is possible to adjust the cutting amount of the bonding material.

The cut-out body 421 may further include an outlet and a third valve 426.

The binder is discharged to the sintering cart 100 through the discharge port.

The third valve 426 is formed at the outlet and controls the binding material supplied through the second valve to be discharged more precisely and quantitatively. The third valve 426 may be a cam type valve.

The cutout may further include a bonding material swash plate 427.

The bonding material swash plate 427 guides the cut-out bonding material to the sintering cart 100.

The blended raw material providing unit may include a surge hopper 310, a drum feeder 320, and a blended raw material swash plate 330.

The blended raw material providing unit may further include a cut-off plate 340.

4 is a schematic diagram of an apparatus for manufacturing a sintered ore according to an embodiment of the present invention.

In the sintered ore manufacturing apparatus in which the binder providing unit 400 is installed according to an embodiment of the present invention, the binder providing unit 400 is installed between the surge hopper 310 and the cut-off plate 340, and the binder providing unit 400 ), it is possible to input the binder used as a heat source.

5 is a schematic diagram of a bonding material providing unit 400 according to an embodiment of the present invention.

6 is an enlarged view of a cutout portion of the bonding material providing unit 400 according to an embodiment of the present invention.

First, the bonding material providing unit 400 is provided with a bonding material pressure conveying line for conveying the bonding material by pressure from the ground and a gas discharge line 413 for discharging gas inside the hopper during the pressure conveying. In addition, a leveler 416 capable of measuring the loading degree of the bonding material and a load cell 415 for measuring the amount of the charged bonding material are provided inside the hopper body 411. In addition, a vibrator 414 for evenly distributing the binder that is unevenly distributed inside the hopper body 411 by pressure is attached.

When the bonding material is supplied through the bonding material pressure-feeding line, the butterfly valve, which is the first valve 422, is initially closed to seal the cutouts of the hopper body 411 and the lower part of the hover body to enable the pressure-feeding of the bonding material. The butterfly valve, which is the 1 valve 422, is opened so that the bonding materials pressurized into the hopper can be transferred to the cutout.

As can be seen in FIG. 6, the binder can be supplied quantitatively primarily by the rotation of the rotary valve, which is the second valve, and a minute amount is secondary through the cam-type valve, which is the third valve 426 installed at the bottom. It is configured to enable precise control of the device.

7 is an enlarged view of a cam-type valve that is an embodiment of a third valve according to an embodiment of the present invention. However, this is only an example of a cam type valve, and the shape of the third valve and the cam type valve is not limited thereto.

The cam-type valve comprises a tear drop-shaped valve on the reference shaft (camshaft), and when the camshaft is rotated based on the camshaft, the width of the discharged inlet is changed according to the rotation direction, and the amount of outflow is adjusted. After installing the tear drop shape with the larger diameter on the wall of one side of the discharge port, the width of the discharge port changes according to the distance that the wedge-shaped side is separated from the wall opposite the discharge port according to the rotation of the camshaft. It is possible to finely adjust the amount cut out from the control.

The drive of the camshaft is configured to be controlled by a manual handle or by an electric motor, and the position is fixed once it is possible to cut out fine quantity by adjusting it once or twice for the first time, and then it can be used continuously without adjustment.

The cutout portion composed of the butterfly valve, the rotary valve, and the cam valve may be configured to be 2 to 5 m to fit the width of the sintering bogie 100. In addition, it is configured to enable quantitative cutting of the binder at a level of 0.3~3t/hr by adjusting the rotation speed of the rotary valve and the gap of the cam-type valve.

Hereinafter, preferred examples and comparative examples of the present invention will be described. However, the following examples are only preferred examples of the present invention, and the present invention is not limited to the following examples.

A sintering simulation experiment (sintering POT experiment) in which the distribution of the heat source in the vertical direction of the sintering bed was controlled using the binder providing unit according to an embodiment of the present invention was conducted and the results are shown.

Evaluation Example 1. Sintering result according to powder input amount

4.2 parts by weight of the binder was used based on 100 parts by weight of the total sintered blending material. Of the 4.2 parts by weight of the binder, 0.2 parts by weight, 0.5 parts by weight, 1.0 parts by weight, and 1.5 parts by weight were added to the upper layer of the sintering bed in the form of powder, and the remaining binder was used to prepare the sintered blended material to perform a sintering simulation experiment. The results are shown in Table 1.

In the above experiment, it was based on 600 mm after the sintered layer, and the upper layer means a point within 200 mm from the surface layer of the sintered bed, the middle layer means 200 to 400 mm, and the lower layer means 400 to 600 mm, respectively.

As a binder, CDQ Dust (Coke Dry Quenching Dust) generated during the manufacture of coke was used.

Table 1 below shows the results of evaluation of sintering characteristics according to the amount of powder input.

Powder input conditions Sintering recovery rate
(%) Sintered binder ratio
(kg/ts) Sintered ore strength
(%) Reduction of sintered ore
(%) Comparative example Powder input X 77.5 72.9 74.2 69 Experimental Example 1-1 0.2 parts by weight of powder
Upper input 77.8 72.5 74.1 69.2 Experimental Example 1-2 0.5 parts by weight of powder
Upper input 78.6 71.4 74.1 71.5 Experimental Example 1-3 1.0 parts by weight of powder
Upper input 77.8 71.8 73.8 68.2 Experimental Example 1-4 1.5 parts by weight of powder
Upper input 76.4 72.6 72.9 67.5

The ratio of the sintered binder is calculated as the amount of the binder used to make a sintered ore of properties (+5mm) among the sintered ore discharged after sintering is completed. For example, if the total amount of sintered ore discharged is 52kg, of which, if the product recovery rate is 78%, the quality sintered ore is 40.56kg, and if the total amount of the binder used at this time is 2.94kg, the sintered binder ratio is 2.94kg/0.04056ts = 72.5kg/ts Becomes.

From Table 1, it can be seen that compared to the comparative example in which the powder was not added, when 0.2 to 1.0 parts by weight of the powder was added, the sintering recovery rate increased and the sintered binder ratio decreased.

However, when 1.5 parts by weight of the powder was added, the sintering recovery rate decreased and the sintered binder ratio increased.

In addition, when 0.2 to 0.5 parts by weight of the powder was added, it was confirmed that the reduction of the sintered ore was improved.

In particular, it can be seen that it is most effective when 0.5 parts by weight of the powder is added.

When the amount of the binder in the upper layer of the sintered bed is less than 0.2 parts by weight, it can be seen that the amount of the injected powder is relatively small in order to expect the effect of the powder input.

On the other hand, when the amount of the binder input to the upper layer of the sintered bed exceeds 1.5 parts by weight, an under-calcination phenomenon occurs in the upper layer due to the supply of an excessively large amount of heat to the upper layer of sintering. In addition, the sintered ore quality (sintered ore intensity, sintered ore reduction property) also showed a tendency to deteriorate.

Therefore, for the purpose of improving the sintering recovery rate and reducing the sintered binder ratio, the amount of the powder added to the sintered upper layer is determined to be 0.2 to 1.0 parts by weight, more specifically 0.4 to 0.6 parts by weight.

Evaluation Example 2. Simulation results of sintering according to the type of powder input

4.2 parts by weight of the binder was used based on 100 parts by weight of the total sintered blending material. When the input amount of the upper layer of the sintered bed is fixed at 0.5 parts by weight of 4.2 parts by weight of the binder, the results of sintering simulation according to the type of powder added are shown in Table 2.

Table 2 below shows the evaluation results of sintering properties according to the type of powder input.

Type of powder input Sintering recovery rate
(%) Sintered binder ratio
(kg/ts) Sintered ore strength
(%) Sintered ore
Reducedness (%) Comparative Example 2 Powder input X 77.5 72.9 74.2 69 Experimental Example 2-1 CDQ Dust
Upper input
(Particle size<1mm) 78.6 71.4 74.1 71.5 Experimental Example 2-2 Buncoke
Upper input
(Particle size<3mm) 77.9 72.5 73.2 70.9 Experimental Example 2-3 hard coal
Upper input
(Particle size<3mm) 77.7 72.6 71.6 70.4

Referring to Table 2, compared to Comparative Example 2 (when the powder was not added to the upper layer), it was confirmed that in Experimental Examples 2-1, 2-2, and 2-3, the amount of binder used was reduced and the sintering recovery rate was improved.

In the experiment in which CDQ Dust was added, it was confirmed that the case of 2-1 has a relatively superior effect than the case of the addition of powder coke and anthracite.

This is presumed to vary depending on the particle size characteristics and combustion behavior of the input powder.

In other words, CDQ Dust has a small particle size (<1mm) compared to the other two types of powder, and when added to the upper sintering layer at the same ratio, a certain amount is distributed evenly throughout, and the effect of adding a heat source is excellent. On the other hand, powdered coke and anthracite have a relatively large particle size compared to CDQ Dust (<3mm), and accordingly, the degree of uniform distribution compared to CDQ Dust when added to the sintered upper layer at the same ratio is lower, thereby improving the recovery rate and combining. It shows a feature of less re-expenditure reduction.

In addition, when comparing the case of coke and anthracite having the same particle size, it is judged that the anthracite coal tends to have a higher density and a slower burning rate compared to coke, and accordingly, it is judged that the effect of the injection of the upper layer of sintering of the powder is less effective. do.

Therefore, in order to improve the sintering recovery rate and reduce the cost of the sintered binder, CDQ dust, which is a type of powder that is introduced into the upper layer of sinter, is preferable. When powdered coke or anthracite is added, it is advantageous to have a particle size of 1 mm or less to uniformly distribute the upper layer of the sintered bed.

The present invention is not limited to the above embodiments, but may be manufactured in a variety of different forms, and those of ordinary skill in the art to which the present invention pertains, other specific forms without changing the technical spirit or essential features of the present invention. It will be appreciated that it can be implemented with. Therefore, it should be understood that the embodiments described above are illustrative in all respects and are not limiting.

10 Sintering bogie 20 Upper light supply unit 30 Blended raw material supply unit
50 Ignition furnace 100 Sintering truck 200 Upper light supply unit
300 Mixed raw material supply unit 310 Surge hopper 320 Drum feeder
330 Mixing raw material Inclined plate 340 Cut-off plate 400 Binder supply unit
411 Hopper body 412 Bonding material pressure feed line 413 Gas discharge line
414 Vibrator 415 Load cell 416 Leveler 421 Cutout body
422 First valve 423 Horizontal axis 424 Rotary roll 425 Protrusion
426 3rd valve 427 Binder swash plate 500 Ignition furnace
600 Main Blow 700 Wind box 800 Main exhaust pipe 900 Electric dust collector
1000 Stack

Claims (23)

delete delete delete delete delete delete delete delete delete Sintering bogie;
An upper light providing unit for charging upper light to an inner lower portion of the sintering cart;
A blending material providing unit for charging a blending material onto the charged upper light; And
Including; a binder providing unit for uniformly cutting out the binder material in the width direction of the sintering cart over the charged blending material,
The binding material providing unit,
A storage unit in which the binder is stored; And
It is connected to the lower portion of the storage unit, a cut-out portion for cutting out the bonding material to the sintering cart; Including,
The cutout portion,
A cut-out body in communication with a lower portion of the hopper body and in which the binder is discharged;
A first valve disposed at an upper end of the inside of the cut-out body; And
Includes; a second valve positioned below the first valve and for quantitatively discharging the binder through rotation,
The first valve is opened and closed as the disk rotates about a transverse axis,
The second valve
A rotating roll rotating about a horizontal axis connected to the cutout portion; And
Includes; is formed in an even number along the outer circumferential surface of the rotary roll, projections formed at equal intervals apart from each other
An outlet through which the binder is discharged is formed at the lower end of the cut-out body,
The cutout portion,
A third valve formed at the discharge port to control the quantitative discharge of the binder; further comprising,
The third valve is a cam-type valve,
Sintered ore manufacturing equipment.
The method of claim 10,
Based on 100% by weight of the total bonding material used in the manufacture of the sintered ore, the bonding material cut out from the bonding material providing unit is 4 to 24% by weight,
Sintered ore manufacturing equipment.
delete The method of claim 10,
The storage unit,
A hopper body provided with an internal space to store the binder;
A binder pressure conveying line connected to an upper portion of the hopper body and supplying the binder; And
A sintered ore manufacturing apparatus comprising a; a gas discharge line connected to an upper portion of the hopper body and for discharging gas in the storage unit.
The method of claim 13,
The storage unit,
A leveler for measuring the loading degree of the binder loaded in the hopper body; And
A sintered ore manufacturing apparatus further comprising a; load cell for measuring the weight of the binder charged in the hopper body.
The method of claim 14,
The storage unit,
A sintered ore manufacturing apparatus further comprising; a vibrator connected to the hopper body to vibrate the hopper body.
The method of claim 10,
The first valve is a butterfly valve,
Sintered ore manufacturing equipment.
delete The method of claim 10,
When a virtual line connecting the first protrusion, which is one of the even-numbered protrusions, and the second protrusion formed at a position opposite to the first protrusion forms a horizontal plane perpendicular to the horizontal axis, the inside of the cut-out body is the horizontal plane A sintered ore manufacturing apparatus divided into upper and lower portions based on.
delete The method of claim 10,
The cutout portion,
A sintered ore manufacturing apparatus further comprising a bonding material swash plate positioned below the cut-out body and guiding the cut-out bonding material to the sintering cart.
The method of claim 20,
The blending raw material providing unit,
A surge hopper in which the blended raw materials are stored;
A drum feeder connected to the lower end of the surge hopper and discharging the blended raw material to the sintering cart; And
A sintered ore manufacturing apparatus comprising: a blended material swash plate positioned below the drum feeder, positioned at a rear of the binder swash plate, based on the moving direction of the sintering cart, and guiding the discharged blended material to the sintering cart.
The method of claim 21,
The blending raw material providing unit,
A sintered ore manufacturing apparatus further comprising a cut-off plate positioned in front of the swash plate of the binder based on the moving direction of the sintering cart to planarize the charge charged to the sintering cart.
The method of claim 10,
The width of the cutout portion is formed to be the same length as the width of the sintering truck
Sintered ore manufacturing equipment.

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