WO2013073776A1

WO2013073776A1 - Apparatus and method for removing uncombusted deposit layer from combustion zone of blast furnace

Info

Publication number: WO2013073776A1
Application number: PCT/KR2012/008250
Authority: WO
Inventors: 최태화; 이동조
Original assignee: 주식회사 포스코
Priority date: 2011-11-17
Filing date: 2012-10-11
Publication date: 2013-05-23
Also published as: KR101318385B1; CN104053793B; KR20130054658A; JP6055839B2; JP2015502456A; CN104053793A

Abstract

In order to more effectively and completely remove the uncombusted deposit layer formed in the combustion zone of a blast furnace during operation, an apparatus and method are provided for removing the uncombusted deposit layer from the combustion zone of a blast furnace which include a shocking means for breaking up the uncombusted deposit layer by applying shock energy to the uncombusted deposit layer at the rear end of the combustion zone of the blast furnace.

Description

Apparatus and method for removing unburned sedimentary layer in blast furnace

The present invention relates to a combustion zone unburned deposit removal device and a removal method of the blast furnace for more effectively and reliably remove the unburned deposits formed in the combustion zone inside the blast furnace.

In general, blast furnace operation is a process of charging iron ore and main fuel coke into the blast furnace, and the molten iron is blown by blowing hot air and oxygen through the vent in the bottom of the blast furnace. The coke is burned by hot air and oxygen in the blast furnace. Iron ore in the blast furnace is reduced and melted by high temperature heat and reducing gas generated during coke combustion. In the blast furnace, various phases such as solids, liquids, gases, and powders coexist, and more than 20 chemical reactions occur such as iron ore reduction. Iron ore and coke drops from the top of the blast furnace over 4-5 hours, and in the process, it is made of molten iron and slag through various phase changes and chemical reactions and is discharged through the outlet of the bottom of the blast furnace.

In the lower part of the blast furnace, air or oxygen is blown through the tuyere, and pulverized coal is blown into the blast furnace together with the hot air as an auxiliary fuel. Coke or pulverized coal is burned by hot air and oxygen blown into the blast furnace. This combustion reaction occurs mainly in the combustion zone in front of the tuyere that blows hot air into the blast furnace.

In the combustion zone, some of the differentiated coke and pulverized coal are not burned due to violent turning of coke and lack of oxygen. Unburned coke or pulverized coal will accumulate on the back of the furnace to form a deposit. The sedimentary layer of unburned coke, pulverized coal, or ash forms a rigid wall, which prevents the combustion gas from flowing into the center of the blast furnace and blocks the flow of melt from above. Particularly, in the blast furnace operation, in which a large amount of pulverized coal is blown, the combustibility of the pulverized coal is better than the coke, so the residence time of the coke increases in the furnace, thereby increasing the amount of dust generated, and the amount of unburned pulverized coal also increases, so that more sedimentary layers are formed on the rear of the combustion table. Will accumulate. As a result, the heat transfer and the flow of the reducing gas are worsened, the amount of molten iron is reduced, and the utilization rate of the reducing gas is lowered, thereby lowering the overall blast furnace operation efficiency. This problem is exacerbated as the contents of the blast furnace increase.

In order to solve such a combustion zone sediment in a timely manner, the blowing air temperature is increased, the oxygen blowing amount is increased, the internal temperature of the blast furnace is raised, and the lance structure for grinding the coal is blown so as to adjust the amount of fine coal injection in a conventional manner or to improve the combustibility of the fine coal. There are several ways to try.

However, all of the above-described conventional structures are insufficient techniques to remove the sediment layer in which fine powder, slag, coal ash, etc. are hardened like concrete, and thus do not produce satisfactory results. Therefore, development of a technique for timely eliminating the deposited layer is required.

Accordingly, the present invention provides a blast furnace unburned deposit removal device and a method for removing the unburned deposit formed on the blast furnace combustion zone more effectively and reliably during operation.

To this end, the present removal device may include an impact means for destroying the unburned deposit layer by applying impact energy to the unburned deposit layer formed at the rear end of the blast furnace.

The impact means may include a capsule that explodes to impact the deposition layer, and a gas generating material that is stored in the capsule and generates gas to explode the capsule.

The gas generating material may include a material that generates an expansion gas by a chemical reaction.

The gas generating material may include a material that is vaporized and expands.

The gas generating material may be a mixture in which sugar is mixed with potassium nitrate or sodium nitrate.

The gas generating material may further include kerosene.

The gas generating material may include 70 to 80% by weight of potassium nitrate or sodium nitrate, and 20 to 30% by weight of sugar.

The gas generating material may include 60 to 80% by weight of potassium nitrate or sodium nitrate, 20 to 30% by weight of sugar, and 0 to 10% by weight of kerosene.

The gas generating material may be liquid oxygen.

The capsule may be made of a material that is dissolved by the internal heat of the blast furnace.

The capsule may be made of aluminum or iron or stainless steel.

The capsule is empty inside and an injection hole for injecting a gas generating material therein is formed on one side, the stopper for sealing the capsule in the injection hole may be a structure that is detachably fastened.

The capsule may have a structure in which one end portion is pointed.

The apparatus may further comprise a conveying means for positioning said impact means in an unburned deposit.

The transport means may include a launch tube connected to the internal combustion zone through the blast furnace blast furnace and mounted inside the capsule, and an energy supply unit connected to the launch tube to supply energy for launching the capsule.

The launch tube may have a structure connected to a combustion zone observation window installed at the blast furnace vent.

The launch tube may be a structure installed in the pulverized coal injection lance installed in the blast furnace vent.

The energy supply unit may include a push rod for pushing the capsule, and a driving unit for moving the push rod forward, so as to push the push rod to launch the capsule.

The energy supply unit may supply a gas to the launch tube to launch a capsule at a gas pressure.

The gas may be nitrogen or air.

The conveying means may further include an airtight ring installed along the inner circumferential surface of the launch tube and in close contact with the capsule to maintain airtightness.

The energy supply unit is a supply pipe connected to the launch tube, a high pressure tank connected to the supply pipe and filled with gas to supply a high pressure gas to the launch tube, a first valve installed at the supply pipe to open and close the supply pipe, and the high pressure tank. It may be installed on the gas supply line to be connected may include a boost pump for filling the gas into the high pressure tank.

The energy supply unit may further include a pressure equalizing unit for adjusting the pressure of the launch tube before the capsule launch according to the internal pressure of the blast furnace.

The equalization part is connected to the gas supply line to fill the filling tank, the branch pipe is installed between the filling tank and the launch tube, the branch pipe installed in the branch pipe to open and close the branch pipe, the launch tube It may include a launch tube valve for opening and closing the launch tube.

On the other hand, the present removal method may include the step of applying the impact energy to the unburned deposit formed on the rear end of the combustion zone of the blast furnace to destroy the unburned deposit.

The removal method includes a preparation step of preparing a capsule in which a gas generating material generating gas is injected, a transfer step of transferring the capsule to an unburned deposit in the blast furnace, and an explosion step in which the capsule is exploded by internal heat of the blast furnace. can do.

The gas generating material may further include kerosene.

The gas generating material may be liquid oxygen.

The capsule may be made of aluminum or iron or stainless steel.

The transporting step may include mounting a capsule in a launch tube connected to an internal combustion zone through a blast furnace blast furnace, and supplying a high pressure gas to the launch tube to push the capsule out.

The gas may be nitrogen or air.

The transfer step may further include a pressure equalization step for adjusting the pressure of the launch tube according to the blast furnace internal pressure before the firing step.

As described above, according to the present embodiment, by removing the deposition layer formed at the rear end of the combustion zone, the flow of the gas and the melt can be more smoothly improved, thereby lowering the furnace pressure and increasing the utilization rate of the reducing gas.

In addition, it is possible to increase the operating efficiency of the blast furnace by supplying sufficient heat to the core through the removal of the sediment layer.

In addition, by being able to remove the sediment in the operating state, it is possible to maximize productivity by eliminating the need for a separate operation to remove the sediment or upgrade the equipment.

FIG. 1 is a schematic view showing a structure for removing combustion zone unburned deposits in a blast furnace according to the present embodiment.

2 is a schematic view showing the launch tube of the combustion zone unburned sediment removal device of the blast furnace according to the present embodiment.

3 is a cross-sectional view showing a capsule of the blast furnace unburned deposit layer removal apparatus according to the present embodiment.

4 is a schematic view showing a part of the configuration of the blast furnace unburned sediment removal device according to the present embodiment.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art can easily understand, the embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Where possible, the same or similar parts are represented using the same reference numerals in the drawings.

All terms including technical terms and scientific terms used below have the same meaning as those commonly understood by those skilled in the art. Terms defined in advance are additionally interpreted to have a meaning consistent with the related technical literature and the presently disclosed contents, and are not interpreted in an ideal or very formal sense unless defined.

It is noted that the figures are schematic and not drawn to scale. The relative dimensions and ratios of the parts in the figures have been exaggerated or reduced in size for clarity and convenience in the figures and any dimensions are merely exemplary and not limiting.

Fig. 1 shows the structure of the blast furnace unburned sediment layer removal according to the present embodiment.

As shown in FIG. 1, the blast furnace 100 blows high temperature hot air and oxygen and pulverized coal through the tuyere 110 formed at the bottom thereof to produce molten iron by melting iron ore and coke charged therein.

The blowing hole 120 of the blast furnace 100 is provided with a blowing pipe 120 for blowing hot air. The blowing pipe 120 is a tubular structure having an internal passage, and the observation window 122 for checking the combustion state inside the blast furnace 100 is installed in the horizontal direction at the outer end. In addition, the blowing pipe 120 has an insertion hole 124 is formed on the side of the distal end so that the pulverized coal lance 130 is inserted into the interior through the insertion hole 124. Accordingly, the pulverized coal is introduced into the blast furnace 100 through the tuyere 110 of the blast furnace 100 with the hot air introduced into the blow pipe through the pulverized coal lance 130 and introduced into the blow pipe.

Coke or pulverized coal is burned by hot air and oxygen blown into the blast furnace 100. This combustion reaction occurs mainly in the combustion zone 200 in front of the tuyere 110 to blow hot air into the blast furnace 100. Combustion zone 200 is a large pupil form formed by hot air blown at a flow rate of 250 ~ 290m / sec, coke and pulverized coal meets the oxygen here and burns. In this process, some of the differentiated coke and pulverized coal are not burned, but are stacked on the back of the combustion zone 200 to form the unburned deposition layer 210.

The present removal device is for removing the deposition layer 210, and includes impact means for destroying the deposition layer 210 by applying impact energy to the deposition layer 210 formed at the rear end of the combustion zone 200 of the blast furnace 100. do.

In the present embodiment, as shown in FIG. 2, the impact means may be exploded to impact the deposition layer 210, and the capsule 10 may be stored in the capsule 10 to generate gas. It includes a gas generating material 20 to explode.

The capsule 10 is formed in a cylindrical shape, the inside of the hollow structure so that the gas generating material 20 can be filled. One end of the capsule 10 is formed with an injection hole 12 for injecting the gas generating material 20 therein. The stopper 14 is detachably fastened to the injection hole 12 to seal the capsule 10.

As shown, the capsule 10 has a pointed structure toward one end toward the end. This structure allows the capsule 10 to be more easily embedded in the combustion zone 200 when the capsule 10 is launched toward the combustion zone 200. Therefore, the capsule 10 can reach the deposition layer 210 behind the combustion zone 200 sufficiently with less firing energy.

The injection hole 12 is formed on the pointed tip side of the capsule (10). The stopper 14 coupled to the injection hole 12 is formed in a cone shape to form a pointed tip of the capsule 10. In the present embodiment, the threaded surface is processed on the joint surface of the injection hole 12 and the stopper 14 and may be coupled to each other by a screwing method.

Here, the capsule 10 may be made of a material having a melting point below the ambient temperature of the blast furnace 100, the internal combustion zone 200 more precisely, the material dissolved by the heat inside the blast furnace 100. In the present embodiment, the capsule 10 may be made of aluminum or iron or stainless steel. Accordingly, the capsule 10 is injected into the blast furnace 100 to remove the deposition layer 210 and then melted and removed by the heat inside the blast furnace 100.

In the present embodiment, the gas generating material 20 is filled in the capsule 10, and includes a material that generates an expansion gas by a chemical reaction. Here, the material may be a material that generates gas by reacting with heat inside the blast furnace 100. Heat inside the blast furnace 100 applied to the material may be transferred indirectly to the material through the capsule 10 or directly to the material when the capsule 10 is dissolved.

In the present embodiment, the gas generating material 20 may be a mixture of sugar (C ₁₂ H ₂₂ O ₁₁ ) mixed with potassium nitrate (KNO ₃ ). Alternatively, the gas generating material 20 may include sodium nitrate (NaNO ₃ ) instead of potassium nitrate. In addition, the gas generating material 20 may further include kerosene (C ₁₆ H ₃₄ ). Kerosene increases the explosive power of the capsule (10).

The potassium nitrate or sodium nitrate and sugar may be charged into the capsule 10 in a solid state.

Looking at the chemical reaction of the gas generating material 20, 48KNO ₃ (S) + 5C ₁₂ H ₂₂ O ₁₁ (S) = 24K ₂ CO ₃ (S) + 36CO ₃ (g) + 24N ₂ (g) + 55H ₂ O (g). Due to the reaction, the gas generating material 20 generates 69 mole of gas, causing volume expansion of several thousand times.

Since the content of each material constituting the gas generating material 20 affects the amount of gas produced, the breaking force of the capsule 10 may be adjusted by varying the content of each material.

As a result of varying the content of each material and repeatedly testing the breaking force for each, it was possible to obtain the optimum content for each material of the gas generating material 20 as follows.

In this embodiment, the gas generating material 20 may be mixed with 70 to 80% by weight of potassium nitrate or sodium nitrate, and 20 to 30% by weight of sugar. In addition, when the kerosene is further included, the gas generating material 20 may be mixed with potassium nitrate or sodium nitrate 60 to 80% by weight, sugar 20 to 30% by weight, kerosene 0 to 10% by weight.

When the mixed amount of potassium nitrate or sodium nitrate is outside the above range, the amount of gas generated by the reaction with sugar becomes too large or too small. The explosive power of the capsule is thus too large or too small to destroy the combustion zone deposits, making it difficult to achieve the desired effect.

As such, the gas generating material 20 generates impact energy capable of destroying the deposited layer 210 by generating a gas having a volume of several thousand times by the reaction of potassium nitrate, titanium nitrate, and sugar.

Capsule 10 containing the mixture is exploded by the expansion pressure of the gas generated therein. Therefore, the deposition layer 210 of the combustion zone 200 is destroyed by the impact of the explosive force of the capsule 10 and the expansion energy of the gas generated in the mixture.

In another embodiment, the gas generating material 20 may include a material that is expanded by vaporization. Here, the gas generating material 20 may be liquid oxygen.

Liquid oxygen is present in the liquid state in the capsule 10. The liquid oxygen is evaporated by heat transferred through the capsule 10 inside the blast furnace 100 and expanded to a volume thousands of times. The capsule 10 containing the liquid oxygen is exploded by the expansion pressure of the oxygen generated therein. Therefore, the deposition layer 210 of the combustion zone 200 is destroyed by being impacted by the explosive force of the expansion energy and the capsule 10 due to the vaporization of the liquid oxygen.

In addition, when liquid oxygen is used as the gas generating material 20, the liquid oxygen is vaporized to supply oxygen to the deposition layer 210. Therefore, it is possible to additionally obtain the effect of the combustion of the unburned pulverized coal, powdered coke, etc. accumulated in the deposition layer 210 by the supplied oxygen.

Here, the total amount of the gas generating material 20 into the capsule 10 may be set in various ways depending on the state of the deposition layer 210 to be destroyed. When the amount of the gas generating material 20 is large, the breaking force of the capsule 10 may be increased, but when excessive, the breaking force is too large and may affect the blast furnace 100 equipment. If the amount of the gas generating material 20 is too small, the breaking force may be weakened so that the deposition layer 210 may not be destroyed.

The removal device further includes a transfer means for launching the capsule 10 into the combustion zone 200 and placing it in the deposition layer 210. 3 and 4 show the transfer means.

As shown, the transfer means is connected to the internal combustion zone 200 through the vent 110 of the blast furnace 100 and the launch tube 30, the capsule 10 is mounted therein, and the launch tube 30 It is connected to the capsule 10 includes an energy supply unit 40 for supplying energy for launching.

As a result, the capsule 10 mounted on the launch tube 30 is fired at high speed by the energy applied from the energy supply unit 40 to the launch tube 30, and is embedded in the deposition layer 210 of the combustion table 200.

The launch tube 30 is a long extending tube structure. The inner diameter of the launch tube 30 corresponds approximately to the outer diameter of the capsule 10. An airtight ring 32 is installed on the inner circumferential surface of the launch tube 30 to prevent a gap between the capsule 10 and the inner circumferential surface.

Here, the launch tube 30 is connected to the blowing pipe 120 installed in the tuyere 110 of the blast furnace 100 and the capsule 10 as the deposition layer 210 of the combustion table 200 through the blowing pipe 120. Will fire.

In this embodiment, the launch tube 30 may be connected to the observation window 122 is installed at the horizontal front end of the blowing pipe (120). In addition to the above structure, the launch tube 30 may be connected to an end of the pulverized coal injection lance 130 installed in the blowing pipe 120.

The energy supply unit 40 may be applied to a variety of structures for the capsule 10 launch. In one embodiment, the energy supply unit 40 may include a push rod inserted into the launch tube 30 to push the capsule, and a drive unit such as a drive cylinder for moving the push rod forward at high speed. In the above structure, the push rod is pushed out at high speed by the operation of the drive unit to push out the capsule. The capsule is then released at high speed from the launcher by the pushing force of the push rod.

As another embodiment, the energy supply unit 40 may supply a high pressure gas to the launch tube 30 to launch the capsule 10 at a gas pressure. Gas for launching the capsule 10 may be nitrogen or air.

4 illustrates a configuration of an energy supply unit 40 for using a high pressure gas for launching the capsule 10. In the following description, a structure in which the capsule 10 firing gas is nitrogen will be described as an example.

As shown, the supply pipe 42 is connected to the launch tube 30, the high pressure tank 44 is connected to the supply pipe 42 and filled with nitrogen to supply high-pressure nitrogen to the launch tube 30, the A boosting pump installed on the supply pipe 42 to open and close the supply pipe 42 and the nitrogen supply line 41 connected to the high pressure tank 44 to charge nitrogen into the high pressure tank ( 48).

The nitrogen filled in the high pressure tank 44 is supplied to the launching tube 30 through the supply pipe 42 to act as a driving force for launching the capsule 10 from the launching tube 30.

The high pressure tank 44 is a tank filled with high pressure nitrogen for launching the capsule 10. The high pressure tank 44 instantly supplies high pressure nitrogen to the launch tube 30 through the supply pipe 42.

A fourth valve 53 is installed in the nitrogen supply line 41 to control the supply of nitrogen through the supply line 41. One side of the high pressure tank 44 is provided with a pressure gauge 54 for detecting the pressure inside the high pressure tank 44.

The boost pump 48 fills the high pressure tank 44 with the nitrogen supplied through the nitrogen supply line 41 at a set pressure.

On the nitrogen supply line 41 between the boost pump 48 and the high pressure tank 44, a supply valve 50 is installed to open and close the nitrogen supply line and supply nitrogen to the high pressure tank.

The supply valve 50 is opened when the pressure of the pressure gauge 54 installed in the high pressure tank after the capsule is released, thereby filling the high pressure tank 44 with the nitrogen supplied by the boost pump at the set pressure.

Here, the front and rear of the high pressure tank 44 is provided with a second valve 51 and a third valve 52 which open and close the supply pipe 42 and the supply line 41 respectively connected to the high pressure tank 44. The second valve 51 and the third valve 52 are to assist the first valve 46 and the supply valve 50, and are manually or automatically opened and closed to inject nitrogen into the high pressure tank 44 when necessary. Or spilled.

In addition, the energy supply unit 40 further includes a pressure equalizing unit for adjusting the pressure of the launch tube 30 to the pressure inside the blast furnace 100 before launching the capsule 10. The internal pressure of the blast furnace 100 is a high pressure of 4 atm or more. When the launch tube 30 is connected to the blast furnace 100, the gas inside the blast furnace 100 may flow back through the launch tube 30. In order to prevent the backflow of the gas it is necessary to match the pressure inside the blast furnace 30 with the internal pressure of the blast furnace 100 before the capsule 10 is launched.

The equalization part is connected to the nitrogen supply line 41, the filling tank 61 is filled with gas, the branch pipe 62 is installed between the filling tank 61 and the launch tube 30, the branch pipe And a branch pipe valve 63 installed at the 62 to open and close the branch pipe 62, and a launch pipe valve 64 provided at the launch pipe 30 to open and close the launch pipe 30.

In this embodiment, the filling tank 61 is connected to a boost pump 48 installed in the nitrogen supply line 41. Nitrogen is charged to the filling tank 61 or / and the high pressure tank 44 according to the operation of the boost pump 48.

Before and after the filling tank 61, the fifth valve 65 and the sixth valve 66 for opening and closing the branch pipe 62 and the supply line 41 connected to the filling tank 61 is provided. The fifth valve 65 and the sixth valve 66 are to assist the branch pipe valve 63, and are manually or automatically opened and closed as necessary to allow nitrogen to flow into or out of the filling tank 61.

The branch pipe 62 connects the filling tank 61 and the launch tube 30 to supply nitrogen to the launch tube 30. The branch pipe 62 is connected to the launch tube 30 between the launch tube valve 64 installed in the launch tube 30 and the capsule 10 mounting position of the launch tube 30. The launch tube 30 is further provided with a pressure gauge 67 for detecting the pressure inside the launch tube 30.

Accordingly, by opening and closing the branch pipe valve 63 installed in the branch pipe 62 and the launch pipe valve 64 installed in the launch pipe 30 before the capsule 10 is launched, nitrogen is supplied to the inside of the launch pipe 30 to supply the launch pipe 30. The internal pressure can be maintained to be the same as the pressure inside the blast furnace 100.

Hereinafter, the process of removing the deposited layer 210 will be described.

Removal of the deposited layer 210 according to the present embodiment is made through the method of destroying the deposited layer 210 by applying impact energy to the deposited layer 210.

In order to destroy the deposition layer 210, first, a gas generating material 20 generating gas is prepared to prepare a capsule 10 injected therein. The operator loads the gas generating material 20 for exploding the capsule 10 into the capsule 10 and seals the capsule 10 to prepare it.

When the capsule 10 for generating the impact energy is prepared, the capsule 10 is fired into the blast furnace 100 in the following process, and is embedded in the deposition layer 210 of the combustion zone 200 of the blast furnace 100.

In the present embodiment, for launching the capsule 10, a blower pipe is installed in the launch tube 30, and the launch tube 30 on which the capsule 10 is mounted is provided at the tuyere 110 of the blast furnace 100. To 120. The launch tube 30 may be connected to the observation window 122 installed at the tip of the blow pipe 120, or may be connected to the pulverized coal injection lance 130 installed at the blow pipe 120.

When the launching tube 30 is installed in the observation window 122, the pulverized coal blowing lance 130 extending into the blowing pipe 120 is retracted to the outside, between the fired capsule 10 and the pulverized coal blowing lance 130. Do not cause interference.

When the capsule 10 is to be launched using the pulverized coal blowing lance 130, a launch tube 30 is mounted at the outer end of the pulverized coal blowing lance 130.

When the launching tube 30 is connected to the blower pipe 120, the supply pipe 42 into which the high pressure nitrogen is injected is connected to the rear end of the launching tube 30. The high pressure nitrogen generates a driving force for pushing the capsule 10.

When the setting of the equipment for launching the capsule 10 is completed as described above, by supplying high-pressure nitrogen to the launching tube 30 instantaneously through the supply pipe 42, the capsule 10 mounted on the launching tube 30 can be launched. It becomes possible. The capsule 10 fired from the launch tube 30 is past the blowing pipe 120 and is embedded in the combustion zone 200 to be positioned in the deposition layer 210 behind the combustion zone 200.

The capsule 10 is exploded by the internal heat of the blast furnace 100 in the deposition layer 210 to remove the deposition layer 210.

Here, the removal method is subjected to a process of adjusting the internal pressure of the launch tube 30 to the internal pressure of the blast furnace 100 in a state in which the launch tube 30 is connected to the blast furnace 100 before the capsule 10 is launched.

As shown in FIG. 4, when the fourth valve 53 installed in the nitrogen supply line 41 is opened and the boost pump 48 is driven, nitrogen is connected to the filling tank 61 along the supply line 41. And is transferred to the high pressure tank 44 is filled. In this filling process, the supply valve 50 installed in the supply line 41 is opened. The second valve 51, the third valve 52, the fifth valve 65, and the sixth valve 66 serve as auxiliary valves, and are kept open in a state in which the apparatus is normally operated. Nitrogen is introduced into the filling tank 61 and the high pressure tank 44. In addition, the first valve 46 installed in the supply pipe 42 is closed to block the outflow of nitrogen. In addition, the launch pipe valve 64 and the branch pipe valve 63 installed in the branch pipe 62 is installed in the launch pipe 30 is also closed.

In this state, when the branch pipe valve 63 installed in the branch pipe 62 is opened, nitrogen in the filling tank 61 flows into the launch tube 30 through the branch pipe 62. The pressure inside the launch tube 30 is increased by nitrogen flowing into the launch tube 30. The pressure inside the launch tube 30 is detected through a pressure gauge 67 installed in the launch tube 30. When the pressure inside the launch tube 30 gradually increases and becomes equal to the pressure of the combustion zone 200 in the blast furnace 100, the launch tube valve 64 installed in the launch tube 30 is opened. The gas inside the blast furnace 100 does not flow back into the launch tube 30 because the launch tube valve 64 is opened to operate under the same pressure even when the combustion zone 200 and the launch tube 30 of the blast furnace 100 communicate with each other. When the internal pressure adjustment of the launch tube 30 is completed, the branch valve 63 is closed to block nitrogen movement through the branch pipe 62.

In this way, it is checked whether the charged nitrogen of the high pressure tank 44 has reached a sufficient pressure for launching the capsule 10 while the pressure inside the launch tube 30 is adjusted. The pressure of the high pressure tank 44 can be detected through the pressure gauge 54 installed in the high pressure tank 44.

When nitrogen is charged to the high pressure tank 44 at a sufficient pressure, the first valve 46 installed in the supply pipe 42 is opened to launch the capsule 10. When the first valve 46 is opened, the high pressure nitrogen charged in the high pressure tank 44 is instantaneously supplied to the launch tube 30 through the supply pipe 42. The capsule 10 mounted on the launch tube 30 is pushed out at a high speed by the high pressure nitrogen supplied to the launch tube 30, and is launched into the blast furnace 100 through the tip of the launch tube 30.

The capsule 10 fired from the launch tube 30 is impregnated into the combustion zone 200 of the blast furnace 100 to be embedded in the deposition layer 210 at the rear end of the combustion zone 200.

After the capsule 10 is fired, the first valve 46 is immediately closed to block the flow of the gas inside the blast furnace 100 through the launch tube 30.

The capsule 10 embedded in the sedimentation layer 210 inside the blast furnace 100 has a gas volume of several thousand times as large as the gas generating material 20 loaded inside the capsule 10 reacts with the heat in the blast furnace 100. Will generate

The capsule 10 is exploded by the expansion pressure of the gas generated therein. Impact energy is generated in the deposition layer 210 by the expansion energy of the gas and the explosive force of the capsule 10. Therefore, the deposition layer 210 of the combustion zone 200 is destroyed and removed by such impact energy.

While the exemplary embodiments of the invention have been illustrated and described as described above, various modifications and other embodiments may be made by those skilled in the art. Such modifications and other embodiments are all considered and included in the appended claims, without departing from the true spirit and scope of the invention.

Claims

Apparatus for removing unburned deposits in a blast furnace comprising impact means for applying an impact energy to the unburned deposits formed at the rear end of the blast furnace to destroy the unburned deposits.
The method of claim 1,

The impact means is a combustion zone unburned deposit removal device of the blast furnace comprising a capsule that is exploded to impact the deposition layer and a gas generating material stored in the capsule to generate gas to explode the capsule.
The method of claim 2,

The gas generating material is a combustion zone unburned deposit removal device of the blast furnace comprising a material that generates an expansion gas by a chemical reaction.
The method of claim 2,

The gas generating material is a combustion zone unburned deposit removal device of the blast furnace comprising a material that is evaporated and expanded.
The method of claim 3, wherein

The gas generating material is a combustion zone unburned deposit removal device of the blast furnace of a structure in which sugar is mixed with potassium nitrate or sodium nitrate.
The method of claim 5,

The gas generating material further comprises kerosene, the combustion zone unburned deposit removal device of the blast furnace.
The method of claim 5,

The gas generating material is 70 to 80% by weight of potassium nitrate or sodium nitrate, 20 to 30% by weight sugar blast furnace unburned sediment removal device.
The method of claim 6,

The gas generating material is 60 to 80% by weight of potassium nitrate or sodium nitrate, 20 to 30% by weight sugar, 0 to 10% by weight kerosene combustion zone unburned sediment removal device.
The method of claim 4, wherein

The gas generating material is a liquid oxygen blast furnace combustion zone unburned deposit removal device.
The method of claim 2,

The capsule is a combustion zone unburned deposit removal device of the blast furnace made of a material that is dissolved by the heat inside the blast furnace.
The method of claim 10,

The capsule is blast furnace unburned deposit layer removal device made of aluminum, iron or stainless steel.
The method of claim 2,

The inside of the capsule is empty and one side is formed with an injection hole for injecting the gas generating material therein, the combustion zone unburned sediment removal device of the blast furnace of the structure in which a stopper for sealing the capsule to the inlet is detachably fastened.
The method of claim 2,

The capsule is a combustion zone unburned deposit removal device of the blast furnace having a pointed one end portion structure.
The method according to any one of claims 1 to 13,

Apparatus for removing the combustion zone unburned deposits of the blast furnace further comprising a transfer means for positioning the impact means in the unburned deposits.
The method of claim 14,

The transfer means is unburned combustion zone of the blast furnace comprising a launch tube connected to the internal combustion zone through the blast furnace blast furnace and the capsule is mounted therein, and an energy supply unit connected to the launch tube for supplying energy for firing the capsule. Sediment Removal Device.
The method of claim 15,

The launch tube is a combustion zone unburned deposit removal device of the blast furnace of the structure connected to the combustion zone observation window installed in the blast furnace vent.
The method of claim 15,

The firing tube is a combustion zone unburned deposit removal device of the blast furnace having a structure installed in the pulverized coal injection lance is installed in the blast furnace vent.
The method of claim 15,

And the energy supply unit includes a push rod for pushing the capsule and a driving unit for moving the push rod forward, and pushes the push rod with the push rod to launch the capsule.
The method of claim 15,

The energy supply unit is a combustion zone unburned deposit removal device of the blast furnace of the structure to supply gas to the launch tube to launch the capsule at the gas pressure.
The method of claim 19,

The gas is nitrogen or air blast furnace combustion zone unburned deposit removal device.
The method of claim 15,

The conveying means is installed along the inner circumferential surface of the launch tube and further comprising an airtight ring to be in close contact with the capsule to maintain the airtight blast furnace unburned deposition layer removal apparatus.
The method of claim 19,

The energy supply unit is a supply pipe connected to the launch tube, a high pressure tank connected to the supply pipe and filled with gas to supply a high pressure gas to the launch tube, a first valve installed at the supply pipe to open and close the supply pipe, and the high pressure tank. Apparatus for removing unburned deposits in the blast furnace of the blast furnace comprising a boosting pump installed on the gas supply line to be connected to the high pressure tank.
The method of claim 22,

The energy supply unit blast furnace unburned sediment removal device further comprises a pressure equalizing unit for adjusting the pressure of the launcher tube to the blast furnace internal pressure before the capsule launch.
The method of claim 23,

The equalization part is connected to the gas supply line to fill the filling tank, the branch pipe is installed between the filling tank and the launch tube, the branch pipe is installed in the branch pipe to open and close the branch pipe, the launch tube Apparatus for removing unburned deposits in the combustion zone of a blast furnace including a launch tube valve installed to open and close the launch tube.
And applying the impact energy to the unburned deposit formed on the rear end of the blast furnace to destroy the unburned deposit.
The method of claim 25,

The step of destroying the sedimentation layer is a preparatory step of preparing a capsule in which the gas generating material generating gas is injected, a transfer step of transferring the capsule to the unburned sedimentary layer of the blast furnace combustion table, the explosion of the capsule exploded by the blast furnace internal heat A method of removing a combustion zone unburned deposit in a blast furnace comprising the step.
The method of claim 26,

The gas generating material is a combustion zone unburned sediment removal method of the blast furnace containing a material that generates an expansion gas by a chemical reaction.
The method of claim 26,

The gas generating material is a combustion zone unburned sediment removal method of the blast furnace comprising a material that is evaporated and expanded.
The method of claim 27,

The gas generating material is a combustion zone unburned sediment removal method of the blast furnace in which sugar is mixed with potassium nitrate or sodium nitrate.
The method of claim 29,

The gas generating material further comprises a kerosene, combustion zone unburned sediment layer removal method of the blast furnace.
The method of claim 29,

The gas generating material is 70 to 80% by weight of potassium nitrate or sodium nitrate, 20 to 30% by weight of sugar blast furnace unburned sediment layer removal method.
The method of claim 30,

The gas generating material is 60 to 80% by weight of potassium nitrate or sodium nitrate, 20 to 30% by weight of sugar, 0 to 10% by weight of kerosene.
The method of claim 28,

The gas generating material is liquid oxygen blast furnace combustion zone unburned sediment layer removal method.
The method according to any one of claims 26 to 33,

The transfer step includes the step of mounting the capsule in the launch tube connected to the internal combustion zone through the blast furnace blast furnace, and the firing step of supplying a high-pressure gas to the launch tube to push the capsule to remove the combustion zone unburned sedimentary layer of the blast furnace Way.
The method of claim 34, wherein

The gas is nitrogen or air blast furnace combustion zone unburned sediment layer removal method.
The method of claim 34, wherein

Wherein the transfer step of the combustion zone unburned sediment layer removal method of the blast furnace further comprises a pressure equalization step for adjusting the pressure of the tube to match the internal pressure of the blast furnace before the firing step.