KR100545844B1 - Method for manufacturing impacted bricks and their kilns - Google Patents

Abstract

The present invention is to produce a good impact brick by forcibly lowering the temperature of the kiln with a cooling device after the sintering and coalescence process of the brick, and to reduce the outgoing time of the brick to maximize the operation efficiency of the firing brick And it is related to the firing furnace, consisting of a fire wall blocked from the outside, a structure having a space for loading bricks, an inlet for supplying carburizing material from the outside into the interior of the structure, installed in the lower portion of the structure By using a firing furnace for manufacturing the impact brick including an exhaust port for discharging the combustion gas generated while firing the brick, heating means for firing the brick in the structure, and cooling means for lowering the temperature inside the structure Forming and drying bricks, loading and firing the bricks in a kiln The step of supplying the carburizing material into the kiln, carburizing the brick, and the step of dropping the temperature inside the kiln by a cooling device, characterized in that for producing the impact brick.

Firing Furnace, Brick, Carburizing, Impacting, Chiller

Description

Method for making carbon coated brick and firing furnace thereof

1 is a longitudinal sectional view of a tunnel litigation path for producing impact bricks of the prior art.

Figure 2 is a perspective view of a carburized car for producing impact bricks of the prior art.

3 is a perspective view of a firing furnace for firing an impact brick according to the present invention.

4 is a cooling apparatus of a kiln using a spraying method according to the present invention.

5 is a schematic view of a firing furnace in which an air-cooled cooling device according to the present invention is installed.

6 is a plan view of a plurality of kilns provided with a cooling device according to the present invention.

7 is a cross-sectional view of the drainage installed in the cooling apparatus of the kiln according to the present invention.

8 is a plan view of a corrugated pipe installed in a plurality of tanks of the kiln cooling apparatus according to the present invention.

9a to 9b is a manufacturing process diagram of the impact brick according to the present invention.

10 is a graph of temperature and time for the firing, carburizing, and impacting processes of the impact brick according to the present invention.

Explanation of symbols for the main parts of the drawings

51 firing furnace 52 fireproof wall

53: crater 54: burner

55: thermometer 56: viewing window

57: stack 58: exhaust vent

59: feeder 60: inlet

70: intake pipe 71: exhaust plate

72: fan 73: corrugated pipe

74: tank 76: cooling device

77: nozzle 79: drain

85: cooling fan 86: cooling tube

The present invention relates to a method for producing impacted bricks and a firing furnace thereof. In particular, after the firing and coalescing processes of bricks are performed, the temperature of the firing furnace is forcedly lowered by a cooling device to produce high-quality impacted bricks, and shortening of the brick outage time. The present invention relates to a method for producing an impact brick for maximizing operating efficiency of a kiln and a kiln thereof.

There are many types of bricks, such as those made of clay, dried and calcined, or a mixture of sand and hydrated lime put in a high-pressure press and then compressed and solidified. . Bricks are also used for foundations, walls, columns, braces, and arches in buildings and other structures, and for the construction of conduits, flues, and chimneys in furnaces. Stacking bricks with mortar has a certain type or stacking method, which can lead to a wide variety of structures.

Clay fired bricks are distinguished by the widely used western red bricks and the black bricks of Korean tradition colored with incompletely burned carbon. Korean traditional carbon-coloured bricks have been produced since the Three Kingdoms period and have a long history of building many facilities using them. In addition, there is a steady demand as a building material due to the aesthetic beauty as well as the renovation of various cultural property facilities in modern times, but due to the difficulty of manufacturing, the quality is poor and the production yield is low, so the price is high, and it cannot meet the demand. It was.

Conventional carbon colored bricks were prepared in Tunnel Kiln. Tunnel kiln is composed of preheating part, firing part, cooling part, and carburizing part, so that it is possible to work consistently, but it is possible to enter and exit the carburizing part of tunnel kiln because the kiln should be sealed in the carburizing and coalescence process of coloring incompletely burned carbon. Carburizing cars were used to seal the atmosphere. However, the use of such a carburizing car has a problem that it is difficult to secure uniform quality due to the cold phenomena of bricks due to the rapid temperature drop and low production yield.

1 is a longitudinal sectional view of a tunnel litigation path for producing impact bricks of the prior art.

The tunnel kiln is provided with a transport rail 16 on which the transport vehicle 15 can move, and the tunnel kiln is formed to have a long length in the tunnel preheating section 11, the firing section 12, the cooling section 13, and It is comprised by the carburizing part 14.

The preheating part 11, the baking part 12, and the cooling part 13 have the same height and width, but the carburizing part 14 in contact with the cooling part 13 has a wider upper, lower, left, and right sides than the cooling part 13. In the bottom face of the carburizing part 14, the carburizing outer rail 18 in which the carburizing car 17 travels is provided. The carburized car 17 is configured to be slightly larger than the car 15 so that the car 15 loaded with the fired bricks can enter. And at the end of the carburizing portion 14 is installed a door (not shown in the figure) through which the carburizing car 17 can enter.

The carburizing rail 18 is installed slightly wider than the carrying rail 16 for the stability of the carburizing car 17 which is wider than the carrying car 15, and the height is lower than the carrying rail 16 so that the carburizing car 17 is cooled. Approaching the part 13 allows the transport rail 16 and the carburized inner rail 19 of the carburized car 17 to coincide with each other.

The inner wall of the carburized car 17 is light and has a carburized inner rail 19 which is identical in size to the conveying rail 16 of the preheating part 11, the baking part 12, and the cooling part 13. . In addition, a sliding shield door (not shown) is provided at a portion where the carburized car 17 and the cooling unit 13 are in contact with each other.

On the front side of the carburizing portion 14 is provided a side door (not shown in the figure) to open and close the shield door of the carburizing car 17.

2 is a perspective view of a carburized car for producing impact bricks of the prior art.

A sliding shield door 21 is installed at the inlet 22 of the carburized car 17 for storing a brick-mounted truck. When the shield door 21 is closed, a hook (not shown in the figure) on the left and right sides of the carburizing car 17 to fix a lock rod (not shown in the drawing) for preventing the shield door 21 from being detached. And insertion plate (not shown). The lock rod is finally secured with a thumbscrew (not shown).

On the left and right sides of the carburizing car 17, a plurality of injection holes 22 are installed to inject and inject petroleum for carburizing the brick into the charcoal car 17, and oil is injected into the carburizing car 17. After completely injecting, an injection hole stopper (not shown) to seal the injection hole 22 is prepared.

A method for producing impact bricks of the prior art with reference to FIGS. 1 and 2 is as follows.

When the appropriate amount of dried molded brick 20 is loaded into the transport vehicle 15 and enters the preheating part 11 of the kiln, the brick 20 is heated while moving slowly from the preheating part 11 to the baking part 12. do. In the baking part 12, since the high temperature baking temperature is maintained by the burner (not shown in figure), the brick 20 which passes through the baking part 12 is fully baked.

When the transport vehicle 15 passes through the firing unit 12, the cooling unit 13 stops heating to slowly cool naturally. When the transport vehicle 15 reaches the end of the cooling unit 13, the shielding door 21 is used. With this open body, the carburizing car 17 which enters the carburizing part 14 through the door approaches and contacts the conveying rail 16, and the carburizing inner rail 19 in the carburizing car 17 coincides with the conveying rail 16. do.

When the transport rail 16 and the carburizing inner rail 19 of the carburizing car 17 come into contact with each other, the carburizing car 17 is stopped. At this time, the carriage 15 continues to move and enter the carburettor 17, and when the carriage 15 is completed entering the carburettor 17, it is checked with a sight glass (not shown) and the carriage ( 16, stop the movement of the carburizing car 17 from the transport rail 16 through the side door of the carburizing unit 14, and then close the shielding door 21 to seal the carburizing car 17 and the Open the door and pull back the carburettor 17 out of the kiln. And when the carburizing car 17 comes out of the kiln, the shield door 21 is completely closed using a lock rod etc. using a tool such as a forceps, and the carburizing car 17 is completely sealed.

When the inside of the carburizing car 17 drops to the appropriate carburizing temperature, the carburizing operation is performed by injecting and injecting petroleum in the same state as the temperature in the air through the injector 22 through the injection hole 22 to incomplete combustion. The carburizing car 17 having completed the carburizing operation is to be naturally cooled in the atmosphere.

Such a manufacturing method of the impact brick of the prior art and its firing furnace have the following problems.

First, petroleum is injected and injected at the same temperature as the air temperature through the inlets provided on the left and right sides of the carburized car, and the petroleum is in direct contact with the brick before the injected oil is incompletely burned. Direct contact with petroleum, such as bricks at ambient temperatures suitable for carburizing and petroleum temperatures, causes severe temperature differences, causing the bricks to blast, resulting in poor brick quality and yield.

Secondly, the carburizing car has a certain thickness of insulation material such as ceramic fiber with high heat resistance, but since it is exposed to the atmosphere after exiting the kiln, the internal temperature of the carburizing car sharply drops, making it difficult to maintain an appropriate carburizing temperature. It is difficult to make. Therefore, it is difficult to ensure uniform quality of the product.

The present invention is to solve the problems of the prior art method of producing the impact brick and its firing furnace, the process of firing and impacting the brick in the firing furnace, in particular, by installing a cooling device in the firing furnace to fire and impact the brick It is an object of the present invention to provide a method for producing impacted bricks and a firing furnace thereof, by producing a high-quality impacted brick by reducing the temperature of the kiln after the process and shortening the outage time of the brick to maximize the operating efficiency of the kiln.

This object is achieved by the following configuration.

(1) the firing furnace for producing the impact brick according to the present invention consists of a fireproof wall cut off from the outside, the structure having a space to load the brick; An injection hole capable of supplying carburizing material from the outside to the inside of the structure; An exhaust port installed at a lower portion of the structure to discharge combustion gas generated while firing the bricks; Heating means for firing the brick in the structure; And cooling means for lowering the temperature inside the structure.

(2) A firing furnace for producing an impact brick as in (1), wherein the cooling means includes an intake pipe for sucking air in the structure; An exhaust pipe for injecting the air into the structure; And a cooling device for cooling the air circulating between the intake pipe and the exhaust pipe.

(3) In the firing furnace for manufacturing the impact brick as described in (2), the intake pipe is connected to the upper side of the one side of the structure, the exhaust pipe is characterized in that connected to the lower side of the one side of the structure.

(4) A firing furnace for producing an impact brick such as (2) or (3), wherein the intake pipe and the cooling device are located between the exhaust pipe and the cooling device, the middle of the intake pipe, and the exhaust pipe. Selecting one or more of the middle is characterized in that for installing the fan to circulate the air.

(5) A firing furnace for producing an impact brick as in any one of (2) to (4), wherein the cooling device is provided between the intake pipe and the exhaust pipe, and has a surface area for easy cooling of the air. The corrugated pipe is increased and the corrugated pipe is located, characterized in that it comprises a water tank for supplying and draining cooling water.

(6) A firing furnace for producing an impact brick such as (5), wherein the corrugated pipe is cooled by being completely immersed in the cooling water of the tank.

(7) In the firing furnace for manufacturing impact bricks as described in the above (5) or (6), the water tank is installed to be inclined so that the cooling water flows, and the intake pipe is connected to the higher inclined side, The exhaust pipe is connected to the lower side.

(8) In the firing furnace for producing impact bricks as described in (5), the corrugated pipe is cooled by the cooling water sprayed from a plurality of nozzles connected to the cooling water supply pipe by installing a cooling water supply pipe on an upper portion of the corrugated pipe. It is characterized by.

(9) A kiln for producing impact bricks as described in (2), wherein a cooling fan is provided between the intake pipe and the exhaust pipe to cool the air passing through the cooling pipe and the cooling pipe. .

(10) A firing furnace for producing an impact brick as in any one of (2) to (9), wherein the intake pipe is between the cooling device, between the exhaust pipe and the cooling device, and in the middle of the intake pipe, And it is characterized in that for installing one or more of the middle of the exhaust pipe to further install a drain to drain the water generated by the water vapor contained in the air circulating.

(11) In the firing furnace for manufacturing impact bricks as described in (10), the drainer is connected to a sump collecting water and a lower part of the sump, and drain traps for draining water and preventing inflow of outside air. It is characterized by including.

(12) a firing furnace for manufacturing impact brick according to the present invention comprises a plurality of structures made of a fireproof wall blocked from the outside, and having a space for loading bricks; A plurality of inlets for supplying carburizing material from the outside to the inside of the plurality of structures; An exhaust port installed at a lower portion of the plurality of structures and discharging combustion gas generated while firing the bricks; Heating means for firing the bricks in the plurality of structures; An intake pipe connected to the plurality of structures and configured to suck air in the plurality of structures; An exhaust pipe connected to the plurality of structures and injecting air into the plurality of structures; It characterized in that it comprises a cooling device provided between the intake pipe and the exhaust pipe.

(13) In the firing furnace for producing impact bricks as described in (12), an intake branch pipe is installed at an upper portion of the plurality of structures and an exhaust branch pipe is provided at a lower portion of the plurality of structures, and the intake branch pipes of the plurality of structures are formed. The intake pipe is connected, characterized in that the exhaust pipe is connected to the exhaust pipe.

(14) A firing furnace for producing an impact brick such as (12) or (13), wherein between the intake pipe and the cooling device, between the exhaust pipe and the cooling device, the middle of the intake pipe, and the exhaust pipe. Selecting one or more of the middle of the characterized in that the installation of the fan to circulate the air.

(15) A firing furnace for producing an impact brick as in any one of (12) to (14), wherein the cooling device is provided between the intake pipe and the exhaust pipe, and has a surface area for easy cooling of the air. The corrugated pipe is increased and the corrugated pipe is located, characterized in that it comprises a water tank for supplying and draining cooling water.

(16) A firing furnace for producing an impact brick as in any one of (12) to (15), wherein: between the intake pipe and the cooling device, between the exhaust pipe and the cooling device, the middle of the intake pipe, And it is characterized in that for installing one or more of the middle of the exhaust pipe to further install a drain to drain the water generated by the water vapor contained in the air circulating.

(17) The method for producing impact brick according to the present invention comprises the steps of molding and drying the brick; Loading and firing the bricks in a kiln; Carburizing the brick by supplying a carburizing material into the kiln; And it is characterized in that it comprises the step of forcibly lowering the temperature inside the kiln by a cooling device.

(18) A method of producing an impact brick as in (17), comprising: firing the brick at 1000 ° C to 1200 ° C for 20 to 35 hours in the firing furnace; Dropping the interior of the kiln to 600 ° C. to 820 ° C., which is a carburizing titration state; Sealing all windows leading to the outside of the kiln, and supplying carburized material into the kiln to carburize the brick for about 3 to 4 hours; Impacting the brick by naturally descending the kiln to reach 450 ° C. to 550 ° C .; And operating a cooling device to forcibly lower the temperature in the firing furnace.

(19) In the method for producing an impact brick such as (17) or (18), the optimum firing temperature and time of the brick are 1180 ° C and 28 hours, and the optimum carburizing titration is about 735 ° C. It is characterized by that.

(20) The method for producing an impact brick according to any one of (17) to (19), wherein the carburized material is a combustion material containing carbon, and the carburized material is a gaseous combustion material such as LPG gas, It is characterized by using one of the combustion materials in the liquid state, such as kerosene, diesel, heavy oil and the like refined in petroleum, and solid combustion materials such as rubber waste tires.

(21) In the method for producing an impact brick according to any one of (17) to (20), in the case where the heavy oil is used as the carburizing material, the supply temperature of the heavy oil is 100 ° C to 130 ° C, Preferably, it is characterized by maintaining 110 ℃.

(22) In the method of manufacturing an impact brick as in any one of the above (17) to (21), after the impacting step is completed, the cooling device is operated to drop to about 3 to 30 ° C per hour, preferably 10 It is characterized by lowering the temperature by about 20 ° C, more preferably about 15 ° C.

(23) The method for producing an impact brick according to any one of (17) to (22), wherein the firing furnace is completely opened when the temperature of the firing furnace reaches about 400 ° C. after the cooling device is forcedly lowered. It is characterized by falling.

(24) A method of producing impact brick according to the present invention comprises the steps of molding and drying the brick; Stacking and firing the bricks in a kiln having an inlet for supplying carburizing material from the outside; Supplying the carburizing material to the firing furnace to carburize the brick; Coloring the bricks with carbon; And it is characterized in that it comprises the step of forcibly lowering the temperature inside the kiln by a cooling device.

Hereinafter, a method of manufacturing an impact brick and a firing furnace thereof according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a perspective view of a firing furnace for firing an impact brick according to the present invention.

Firing furnace 51 is a structure consisting of a fireproof wall 52 that can be blocked from the outside. The fireproof wall 52 is about 1 m thick. On the left and right side surfaces of the kiln 51, a plurality of burners 53 for installing burners 54, which are heating means for firing the bricks 63 loaded in the kiln 51, are provided. One side of the inlet of the kiln 51 is provided with a thermometer 55 for measuring the temperature inside the kiln 51 and a see-through window 56 for checking the state inside.

In order to discharge the combustion gas inside the kiln 51, a stack (not shown) installed in an underground structure at the bottom of the kiln 51 and a stack of the combustion gas are discharged into the atmosphere at a point where the stack leaves the kiln 51. Install an exhaust port (not shown). And the bottom of the kiln 51 is arrange | positioned in the form of a grid | lattice so that the combustion gas in the kiln 51 may be smoothly exhausted by the chimney between the inside of the kiln 51, and the chimney.

The inlet 60 for injecting a carburizing material (generally heavy oil) during the carburizing operation in which the firing of the brick 63 loaded in the firing furnace 51 is completed and the incompletely burned carbon is infiltrated through the pores of the brick 63 is completed. And the feeder 59 for supplying the carburized material through the injection hole 60.

The feeder 59 feeds the bunker C oil into the first pipe 61 of about 25 mm and branches the first pipe 61 into four second pipes 62 of about 8 mm. Heavy oil of about 100 ° C to 130 ° C, preferably about 110 ° C, is supplied into the kiln 51 through the furnace. The first pipe 61 and the second pipe 62 of the feeder 59 are made of copper tubes.

After the firing and carburizing process of the brick 63 is completed, a cooling device 76 for lowering the temperature in the firing furnace 51 is installed on one side of the firing furnace 51. An intake pipe 70 for sucking hot air inside the kiln 51 is installed at an upper end of the side of the kiln 51, and an exhaust pipe 71 for injecting cooled air is installed at a lower part of the kiln 51 side. . The intake pipe 70 and the exhaust pipe 71 are connected by a corrugated pipe 73, and the corrugated pipe 73 is located in the water tank 74 to which cooling water is supplied. A fan 72 capable of circulating air is provided between the intake pipe 70 and the corrugated pipe 73. Although the performance of the fan 72 is about 5-30 horsepower, the performance of the fan 72 is determined and installed according to the volume of the inside of the kiln 51, and the quantity of air circulating. In addition, a plurality of fans 72 may be provided between the intake pipe 70 and the corrugated pipe 73 as well as in the middle of the intake pipe 70 and the exhaust pipe 71 as necessary.

Although not shown in the figure, a drain is provided between the intake pipe 70 and the corrugated pipe 73 or between the exhaust pipe 71 and the corrugated pipe 73. The drainer functions to drain moisture generated by water vapor contained in the circulating air. The drain can be further installed in the middle of the intake pipe 70 or in the middle of the exhaust pipe 71 according to the degree of moisture generation.

The reason why the corrugated pipe 73 having a large surface area is installed between the intake pipe 70 and the exhaust pipe 71 is to maximize the cooling effect by increasing the heat dissipation efficiency.

The water tank 74 is installed to be inclined so that the coolant flows, the inclined side is connected to the intake pipe 70, the low inclined side is connected to the exhaust pipe 71. A cooling water supply pipe (not shown) is provided near the intake pipe 70 of the water tank 74, and a drain pipe (not shown) is provided near the exhaust pipe 71 of the water tank 74. As shown in FIG. That is, the cooling water is supplied to the water tank 74 so that the corrugated pipe 73 is sufficiently immersed in the cooling water to cool the hot air passing through the corrugated pipe 73, and the hot cooling water is drained through the drain pipe. And the tank 74 is supported by the pedestal 75.

4 is a cooling apparatus of a kiln using a spraying method according to the present invention.

A corrugated pipe 73 is provided between the intake pipe 70 and the exhaust pipe 71, and the corrugated pipe 73 is positioned in the water tank 74. The plurality of nozzles 77 are connected to the cooling water supply pipe 83 that supplies the cooling water to the upper portion of the corrugated pipe 73. The water tank 74 is installed to be inclined so that the coolant flows, the inclined side is connected to the intake pipe 70, the low inclined side is connected to the exhaust pipe 71. And a drain pipe (not shown) is provided near the exhaust pipe 71 of the water tank 74. Cooling water is sprayed into the corrugated pipe 73 through the nozzle 77 to cool the hot air passing through the corrugated pipe 73, and the heated coolant is drained through the drain pipe.

5 is a schematic view of a firing furnace in which an air-cooled cooling device according to the present invention is installed.

The intake pipe 70 and the exhaust pipe 71 are connected to one side of the kiln 51, and the cooling pipe 86 which connects between the intake pipe 70 and the exhaust pipe 71 is provided. An intake pipe 70 for sucking hot air inside the kiln 51 is installed at an upper end of the side of the kiln 51, and an exhaust pipe 71 for injecting cooled air is installed at the bottom of the kiln 51 side.

Cooling tube 86 is manufactured in the form of a coil to maximize the area exposed to the atmosphere. The cooling tube 86 may use a corrugated tube to increase the surface area. A fan 72 for circulating air in the kiln 51 is provided at an intermediate point of the intake pipe 70, and a wall 87 is installed between the kiln 51 and the cooling tube 86. Although the performance of the fan 72 is about 5-30 horsepower, the performance of the fan 72 is determined and installed according to the volume of the inside of the kiln 51, and the quantity of air circulating. In addition, a plurality of fans 72 may be provided not only between the intake pipe 70 and the cooling pipe 86 but also in the middle of the intake pipe 70 and the exhaust pipe 71 as necessary.

And the cooling fan 85 for cooling the air passing through the cooling pipe 86 is installed in the wall 87. Although not shown in the figure, a drain is provided between the intake pipe 70 and the cooling pipe 86 or between the exhaust pipe 71 and the cooling pipe 86. The drainer functions to drain moisture generated by water vapor contained in the circulating air. The drain can be further installed in the middle of the intake pipe 70 or in the middle of the exhaust pipe 71 according to the degree of moisture generation.

6 is a plan view of a plurality of kilns provided with a cooling device according to the present invention.

When operating two or more kilns 51, it is advantageous in efficiency to provide the cooling apparatus 76 which connected the intake pipe 70 and the exhaust pipe 71 to each kiln 51. The cooling device 76 may use water cooling as shown in FIG. 4 or air cooling as shown in FIG. 5.

A plurality of firing furnaces using the water-cooled cooling device 76 will be described below.

An intake branch pipe 78 and an exhaust branch pipe 79 are provided at the upper end of each side of the firing furnace 51, and each intake branch pipe 78 is connected to the intake pipe 70, and each exhaust branch pipe 79 is provided. ) To the exhaust pipe (71).

The intake pipe 70 and the exhaust pipe 71 are connected by a corrugated pipe 73, and the corrugated pipe 73 is positioned in the water tank 74 to which cooling water is supplied. A fan 72 capable of circulating air is provided between the intake pipe 70 and the corrugated pipe 73. A plurality of fans 72 may be installed between the intake pipe 70 and the exhaust pipe 71 in consideration of the degree of circulation of air. A drainer 79 is provided between the intake pipe 70 and the corrugated pipe 73 or between the exhaust pipe 71 and the corrugated pipe 73. The drainer 79 functions to drain moisture generated by water vapor contained in the circulating air. The drainer 79 may be further installed according to the degree of moisture generation. The arrow direction indicates the direction in which air circulates.

7 is a cross-sectional view of the drainage installed in the cooling apparatus of the kiln according to the present invention.

It is blocked from the outside and the drain pipe 79 is installed to discharge the moisture generated in the air circulating inside the intake pipe 70, corrugated pipe 73, exhaust pipe 71, and the kiln 51 to the outside. The drainage 79 is installed between the intake pipe 70 and the corrugated pipe 73, between the exhaust pipe 71 and the corrugated pipe 73, or at an intermediate point of the intake pipe 70 or the exhaust pipe 71 requiring drainage. It consists of a water bottle 80 and an S-shaped drain trap 81.

The drainage 79 provided between the intake pipe 70 and the corrugated pipe 73 will be described below.

The intake pipe 70 through which the circulating air is introduced into the lower part of the drainer 79 is connected, and the corrugated pipe 73 which discharges the circulating air is connected to the upper part of the other side of the drainer 79. This is to collect moisture contained in the air and to discharge dry air.

A certain amount of water is always kept in the middle of the S-shaped drain trap 81 connected to the lower part of the sump 80, which prevents external air from being introduced into the drain 79.

8 is a plan view of a corrugated pipe installed in a plurality of tanks of the kiln cooling apparatus according to the present invention.

A plurality of corrugated pipes 73 provided between the intake pipe 70 and the exhaust pipe 71 and in the water tank 74 can be provided. The reason why the corrugated pipe 73 is provided in plural numbers is that the heat dissipation efficiency is higher than that when the corrugated pipe 73 is provided in one piece. Branch pipes 82 are provided in the intake pipe 70 and the exhaust pipe 71, and a plurality of corrugated pipes 73 are provided between the branch pipes 82.

9a to 9b is a manufacturing process diagram of the impact brick according to the present invention.

Figure 9a is a process of crushing the soil finely blended to produce a brick, a clay supply, a separation process, and a process of supplying the clay as a raw material of the brick to the raw material reservoir. The raw material reservoir 32 is supplied with clay 31 suitably blended to suit the characteristics of the brick, and the foreign matter such as stones contained in the clay 31 is removed by the separator 33. Then, the clay 31 is pulverized by the primary crusher 34, the raw materials of different properties are mixed, moisture is controlled, and the clay 31 is processed more precisely than the primary crusher 34 by the secondary pulverizer 35. do. Finally, the crushed clay 31 is stored in the second raw material reservoir 36 to be aged to facilitate uniform water distribution, increase the strength of the product, and mix easily.

FIG. 9B is a step of mixing and blending clay 31 with an appropriate amount of water in a coma kneader 37 to blend and blend, and forming a brick having a desired shape according to the type of product. The raw material processed by the molding machine 38 is kept in a vacuum state and extruded at high pressure to form a brick, and the cutting machine 39 accurately cuts the product according to the product dimensions. Keep the shape good. Using the calcination furnace of FIG. 3, the calcination, carburization, and coalescence processes of the brick 63 are performed.

10 is a graph of temperature and time for the firing, carburizing, and impacting processes of the impact brick according to the present invention.

The X axis of the graph represents time and the Y axis represents temperature. 2 to 8, the firing, carburizing, and coalescence processes of the impact brick according to the present invention will be described as follows.

The first section 91 is a firing step of the brick 63. Dry brick 63 is loaded inside the kiln 51, the inlet of the kiln 51 is sealed with refractory bricks, etc., and burners 54 are installed in the crater 53 on the left and right sides of the kiln 51. After heating is started, the internal temperature of the kiln 51 is raised to point A and maintained for 20 to 35 hours. The temperature of point A is 1000 ° C to 1200 ° C and the optimum temperature is 1180 ° C, the optimum time of the first section 91 is 28 hours, but the optimum temperature and time may vary depending on the conditions of the kiln 51.

In addition, the first section 91 is also referred to as oxidative firing, which is maintained by firing for 20 to 35 hours at 1000 ° C to 1200 ° C in a state where oxygen is sufficient in the firing furnace 51. When the brick 63 is oxidized and fired, it becomes red.

When the brick 63 is completely fired, heating by the burner is stopped to complete the firing process of the first section 91.

In the second section 92, the internal temperature of the kiln 51 is naturally lowered after about 24 hours in the first temperature dropping step to be lowered to point B, which is an appropriate carburizing temperature. The temperature of point B is 600 ° C to 820 ° C, the optimum carburizing temperature is about 735 ° C, and the optimum temperature may vary depending on external conditions and types of products.

The third section 93 is a carburizing step, and seals all windows communicating with the outside of the kiln 51, and the bunker fuel oil C 65, which is a carburizing material, is injected through the inlet 60 for about 3 to 4 hours. Supply. Heavy oil is supplied to the container (not shown in figure) located in the upper part of the stacking brick 63, or it is supplied to the container located in the inner bottom of the kiln 51 of the left and right of the stacking brick 63. As shown in FIG.

Carburizing materials can be carbon-containing combustion materials, such as gaseous combustion materials such as LPG gas, liquid combustion materials such as kerosene, petroleum refined from petroleum, light oil, heavy oil, etc., and solids such as rubber waste tires. State combustion materials can be used.

The kiln 51 is sealed and supplies heavy oil for about 3 to 4 hours while maintaining the carburizing temperature at 600 ° C to 820 ° C. The temperature of the heavy oil 65 supplied to the inside of the kiln 51 from the outside is 100 to 130 degreeC, Preferably it is 110 degreeC. And 70-80 liters of heavy oil 65, a carburizing material, is supplied to about 10,000 pieces of bricks 63. Of course, the amount of heavy oil 65 may also vary depending on the type of product and external conditions.

Since the thickness of the fire-resistant wall 52 of the kiln 51 has a considerable latent heat of about 1 m, it is possible to maintain a stable carburized state due to a relatively small temperature change. Since the kiln 51 is hermetically sealed, the heavy oil 65 supplied to the container 64 is incompletely burned and the incompletely burned carbon begins to penetrate through the fine pores of the brick 63.

The fourth section 94 is a carbon coloring step, and the carbon coloring process is a section in which the internal temperature of the kiln 51 drops to point C after the carburizing process is completed. The time required is about 30 hours. The temperature of point C is about 450 ~ 550 ℃, the appropriate temperature drop is 490 ℃, the optimum temperature and time may vary depending on the external conditions and product type.

In the kiln 51, the incompletely burned carbon that penetrates through the pores of the brick 63 is completely colored. As such, the process of carburizing and coalescing in an insufficient supply of oxygen is referred to as a reducing salt treatment process. The reduced salted brick 63 is black in color. And the color of the brick 63 is determined in the degree and temperature of the oxygen supply in the process of carburizing and impacting. In general, when the oxygen supply increases, it becomes red, and when the oxygen supply is cut off, it becomes black. Of course, changes in carburization and impact temperature also affect the color of the brick 63.

The fifth section 95 is a firing furnace 51 through a cooling device 76 having an intake pipe 70, a corrugated pipe 73, and an exhaust pipe 71 while gradually opening a window of the firing furnace 51 as a secondary temperature drop section. The internal air is cooled by forced circulation. Opening the window of the kiln 51 first removes the sealed concave inlet door (not shown) and the outer wall of the concave door (not shown). Slowly remove the inner wall of the urinal door from the top. The temperature inside the kiln 51 is lowered such that the brick 63 does not cause defects such as cold waves, and is usually about 3 to 30 ° C. per hour, preferably about 10 to 20 ° C., and more preferably about 15 ° C. .

When the internal temperature of the kiln 51 reaches point D, all the windows of the kiln 51 are completely opened, a fan, etc. are operated and forced quenching is brought to room temperature. The temperature of point D is about 400 ° C., and if the internal temperature of the firing furnace 51 is 400 ° C. or lower, at least cold wave of the brick 63 does not occur. When the temperature inside the kiln 51 is continuously lowered, the temperature of the kiln 51 is lowered to a temperature at which a person can work, and when the inside of the kiln 51 is completely cooled, the brick 63 is packed and unloaded or shipped. .

Such a method for producing an impact brick according to the present invention and its firing furnace have the following effects.

First, by installing a cooling device in the kiln, the firing, carburizing, and coalescence processes of the impacted bricks are completed, and the inside of the kiln is forced to cool to the extent that the cold wave does not occur. The shortening of the run-out time of the brick increases the operating rate of the kiln, thus improving productivity.

Second, the fireproof wall of the kiln is about 1m and has a considerable latent heat, so that it can maintain the optimal state during carburizing and impacting, so that high quality impacting brick can be obtained.

Third, by supplying heavy oil, which is a carburizing material, to a container inside the kiln at about 100 ° C. to 130 ° C., since the heavy oil does not directly come into contact with the brick, the cold wind phenomenon of the brick may be prevented to increase the production yield.

Fourth, since the firing, carburizing, and coaling of the bricks are performed in the same firing furnace, the work efficiency is increased, and the conditions can be easily adjusted, and the coalescing bricks of various colors can be produced.

Preferred embodiments of the invention are merely exemplary, and various changes, additions and substitutions may be made by those skilled in the art without departing from the scope and spirit of the invention as set forth in the appended claims.

Claims (17)

delete A structure consisting of a fireproof wall which is blocked from the outside and having a space for loading bricks; An injection hole capable of supplying carburizing material from the outside to the inside of the structure; An exhaust port installed at a lower portion of the structure to discharge combustion gas generated while firing the bricks; Heating means for firing the brick in the structure; An air intake pipe for sucking air in the structure; An exhaust pipe for injecting the air into the structure; And Firing furnace for producing an impact brick, characterized in that it comprises a cooling device for cooling the air circulated between the intake pipe and the exhaust pipe The firing furnace of claim 2, wherein the intake pipe is connected to an upper portion of one side of the structure, and the exhaust pipe is connected to a lower portion of one side of the structure. The method of claim 2 or 3, wherein at least one of the intake pipe and the cooling device, the exhaust pipe and the cooling device, the middle of the intake pipe and the middle of the exhaust pipe is selected to circulate the air. Firing furnace for manufacturing impact brick, characterized in that a fan is installed According to claim 2, wherein the cooling device is installed between the intake pipe and the exhaust pipe, the corrugated pipe to increase the surface area to facilitate the cooling of the air and the corrugated pipe is located and includes a water tank for supplying and draining the cooling water Firing furnace for producing impact brick 6. The firing furnace of claim 5, wherein the corrugated pipe is cooled by being completely immersed in the cooling water of the tank. 6. The firing furnace of claim 5, wherein the water tank is installed to be inclined so that the cooling water flows, the intake pipe is connected to a high inclined side, and the exhaust pipe is connected to a low inclined side. 6. The firing furnace of claim 5, wherein a cooling water supply pipe is installed above the corrugated pipe, and the corrugated pipe is cooled by the cooling water sprayed from a plurality of nozzles connected to the cooling water supply pipe. 3. The firing furnace of claim 2, wherein a cooling fan for cooling the air passing through the cooling pipe and the cooling pipe is disposed between the intake pipe and the exhaust pipe. 3. The water vapor of claim 2, wherein one or more selected from the intake pipe and the cooling device, the exhaust pipe and the cooling device, the middle of the intake pipe, and the middle of the exhaust pipe are selected and circulated. Firing furnace for manufacturing impact brick, characterized in that for further installing a drain for draining water generated by The firing furnace of claim 10, wherein the drainer includes a sump collecting water and a drain trap connected to a lower portion of the sump and draining water and preventing inflow of external air. A plurality of structures formed of a fireproof wall that is blocked from the outside and having a space for loading bricks; A plurality of inlets for supplying carburizing material from the outside to the inside of the plurality of structures; An exhaust port installed at a lower portion of the plurality of structures and discharging combustion gas generated while firing the bricks; Heating means for firing the bricks in the plurality of structures; An intake pipe connected to the plurality of structures and configured to suck air in the plurality of structures; An exhaust pipe connected to the plurality of structures and injecting air into the plurality of structures; Firing furnace for the production of impact brick, characterized in that it comprises a cooling device installed between the intake pipe and the exhaust pipe The exhaust pipe according to claim 12, wherein an intake branch pipe is provided above the plurality of structures and an exhaust branch pipe is provided below the plurality of structures, and the intake pipe connects the intake branch pipes of the plurality of structures, and the exhaust branch pipe is connected to the exhaust pipe. Kiln for the manufacture of impact bricks, characterized in that Forming and drying bricks; Loading and firing the bricks in a kiln; Carburizing the brick by supplying a carburizing material into the kiln; The temperature inside the kiln is forced by an intake pipe that sucks air in the kiln, an exhaust pipe that injects the air into the litho, and a cooling device that cools the air circulating between the intake pipe and the exhaust pipe. Method for producing an impact brick, characterized in that it comprises the step of lowering The method of claim 14, Firing the brick at 1000 ° C to 1200 ° C for 20 to 35 hours in the firing furnace; Dropping the interior of the kiln to 600 ° C. to 820 ° C., which is a carburizing titration state; Sealing all windows leading to the outside of the kiln, and supplying carburized material into the kiln to carburize the brick for about 3 to 4 hours; Impacting the brick by naturally descending the kiln to reach 450 ° C. to 550 ° C .; And Operating a cooling device to forcibly lower the temperature in the firing furnace; The method according to claim 14 or 15, wherein after the impacting step is completed, the cooling device is operated to drop about 3 to 30 ° C per hour, preferably to about 10 to 20 ° C and more preferably about 15 ° C. Method of manufacturing impact bricks characterized in that 15. The method of claim 14, wherein the firing furnace is completely opened and lowered when the temperature of the kiln reaches about 400 ° C after the cooling apparatus is forcedly lowered.

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