A single-chamber side-blown smelting furnace

Abstract

The present invention discloses a single-chamber side-blown smelting furnace, which has a single-chamber structure and includes, from bottom to top, a furnace cylinder, a furnace body, a furnace hearth and a furnace top. A slag partition wall is vertically arranged between the two side walls inside the furnace body. The furnace body is divided into a reaction zone and a depletion zone by the slag partition wall. The depletion zone is provided with a primary air inlet and a slag discharge port. The flue gas outlet of the present invention is located above the depletion zone, and the depletion zone is arranged inside the furnace body, which shortens the length of the furnace body and has the advantages of better furnace body structural stability, investment savings and low consumption of refractory materials.

Description

Technical field:

[0001] The invention relates to a single-chamber side-blown smelting furnace, belonging to the field of smelting equipment. Background technology:

[0002] A side-blown smelting furnace is a vertical furnace with a fixed hearth and a rectangular cross-section. Existing side-blown smelting furnaces have a dual-chamber structure, with two chambers arranged along the length of the furnace body, connected at the bottom and separated at the top by a water-cooled slag partition. The larger chamber serves as the reaction zone, while the smaller chamber serves as the depletion zone. A row of primary air vents is located at the lower portion of each wall on either side of the reaction zone. The furnace roof, located above the reaction zone, is equipped with several feed ports and a flue gas outlet, located at the end of the roof near the depletion zone. The depletion zone, which is 3-6 meters long and located outside the reaction zone, results in a longer furnace body, a greater expansion upon heating, and high investment and refractory consumption. Summary of the invention:

[0003] The object of the present invention is to provide a single-chamber side-blown smelting furnace, in which the reaction zone and the depletion zone are placed in one furnace chamber, thereby shortening the furnace body by 3-6 meters.

[0004] The present invention is implemented by the following technical solutions:

[0005] A single-chamber side-blown smelting furnace comprises a furnace body, the furnace body comprising, from bottom to top, a furnace cylinder, a furnace body, a hearth, and a furnace roof; the furnace body is a single-chamber structure, a slag partition wall is vertically provided between two furnace body side walls within the furnace body, the furnace body is penetrated by the slag partition wall, and a reaction zone and a depletion zone are separated; the length ratio between the reaction zone and the depletion zone is 1:0.2-0.3;

[0006] Primary tuyere is horizontally arranged on the two side walls of the furnace in the reaction zone;

[0007] A siphon channel is provided on the end wall of the furnace away from the depletion zone, and a slag discharge port is provided on the end wall of the furnace away from the reaction zone;

[0008] The furnace top includes a furnace cover and a flue gas outlet, wherein the furnace cover is located above the reaction zone, and the flue gas outlet is located above the depletion zone;

[0009] The furnace cover includes several arched steel water jackets lined with refractory materials. The steel water jackets are arranged side by side in the length direction of the furnace body. The furnace cover is provided with several feed openings and secondary air inlets. The feed openings are arranged at intervals on different steel water jackets. Two secondary air inlets are arranged in a group on a steel water jacket without a feed opening.

[0010] Preferably, the hearth is surrounded by a furnace bottom, hearth end walls and hearth side walls, and the area 300-500 mm downward from the top surface of the hearth side walls and the hearth end walls is built with a mixture of flat copper water jackets and refractory bricks.

[0011] Preferably, the furnace body is surrounded by furnace body side walls and furnace body end walls made of copper water jacket, and the furnace body side walls are divided into a vertically arranged lower furnace body side wall and an inclined upper furnace body side wall, the top of the lower furnace body side wall is aligned with the bottom of the upper furnace body side wall, and the top of the upper furnace body side wall is aligned with the bottom of the furnace; a row of the primary air inlets is embedded in each of the lower furnace body side walls at a position 200-400mm above the bottom surface of the slag partition wall; the outer side of the lower part of the furnace body end wall is built with a brick wall.

[0012] Preferably, the slag partition wall is formed by splicing multiple copper water jackets, and the copper water jacket surfaces of the furnace body side walls, the furnace body end walls and the slag partition wall located in the furnace are horizontally provided with multiple rows of large dovetail grooves, and small dovetail grooves are horizontally provided between adjacent large dovetail grooves; refractory bricks are embedded in the large dovetail grooves, and the refractory bricks protrude from the corresponding copper water jacket surfaces, and the grooves formed between adjacent refractory bricks and the small dovetail grooves are filled with casting material.

[0013] Preferably, an arched slag channel is provided in the middle of the bottom of the slag partition wall.

[0014] Preferably, the slag discharge port is made of a copper water jacket, and the bottom surface of the slag discharge port is 600-900 mm higher than the bottom surface of the slag partition wall.

[0015] Preferably, a primary tuyere is also provided on the side wall of the furnace body in the depletion zone.

[0016] Preferably, the furnace is surrounded by a furnace end wall and a furnace side wall, the inner side of the furnace side wall is stepped, the furnace side wall and the furnace end wall below the flue gas outlet are higher than the furnace cover, the area 1000-2000mm upward from the bottom of the furnace side wall and the furnace end wall is built by a mixture of flat copper water jacket and refractory bricks, the furnace end wall located below the flue gas outlet is entirely built by a mixture of copper water jacket and refractory bricks, an observation port is provided on the furnace end wall away from the flue gas outlet, and a row of secondary air inlets are provided on each of the two furnace side walls.

[0017] Preferably, the flue gas outlet is a copper water jacket structure consisting of a lower flue gas partition wall and an upper flue gas surrounding wall. The flue gas partition wall is clamped by the furnace cover and the furnace side wall, extending into and passing through the furnace.

[0018] Preferably, the flat copper water jacket and refractory bricks are mixedly laid to build several layers of flat copper water jackets with the same thickness as the refractory bricks into the furnace wall. The flat copper water jacket and the refractory bricks are bonded as a whole by refractory mud. There is no need to set a mechanism to support or fix the flat copper water jacket. 2-5 layers of refractory bricks are laid between every two layers of flat copper water jackets. The width of the flat copper water jacket is not greater than the thickness of the furnace wall and not less than 300 mm.

[0019] Preferably, a gap is left between the furnace chamber and the top of the furnace body.

[0020] Advantages of the present invention:

[0021] 1. The length of the furnace body is shortened by the length of a depleted zone, the expansion is small, and the structural stability of the furnace body is strong.

[0022] 2. An arched slag channel is provided at the bottom of the slag partition wall, which partially raises the bottom height of the slag partition wall to adapt to the fluctuation of the matte height; a primary tuyere is set on the side wall of the depletion zone. The primary tuyere is blocked during normal operation. When the slag temperature is low and the fluidity is poor, it is opened to allow oxygen-rich air to flow in, and the reaction heat is used to increase the temperature of the depletion zone, allowing the slag to flow smoothly. The above two points increase the fault tolerance of the smelting furnace.

[0023] 3. The key parts of the furnace hearth and furnace are built with a mixture of refractory bricks and copper water jacket, which enables it to withstand the erosion and scouring of 1350℃ high-temperature melt and flue gas. The furnace wall retains a large thickness, which improves the service life and structural stability of the furnace body.

[0024] 4. The slag discharge port is a copper water jacket structure, which can withstand the scouring and erosion of high-temperature slag at 1350℃ and does not require thermal repair.

[0025] 5. The inner sides of the side walls and end walls of the furnace body are inlaid with bricks and cast, covering the installation gaps between the copper water jackets, thus avoiding the melt from leaking from the installation gaps in the initial stage of furnace opening. The copper water jackets are not in direct contact with the melt and flue gas, which is beneficial to reducing the heat loss of the furnace body and increasing the service life of the copper water jackets.

[0026] 6. The furnace cover is provided with secondary air inlets, which are not easily blocked by splashing melt and slag. The secondary air is sprayed toward the melt in the furnace and forms multiple wind curtains, which have a strong blocking and collecting effect on suspended droplets and dust, which is beneficial to further reduce the smoke rate and fuel rate of the smelting furnace.

[0027] 7. Leave a gap between the furnace body and the furnace chamber to prevent the furnace body from being squeezed and deformed after it expands due to heat. Description of the drawings:

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a schematic structural diagram of the single-chamber side-blown smelting furnace of Example 1;

[0030] Figure 2 for Figure 1A magnified schematic diagram of point A;

[0031] Figure 3 for Figure 1 An enlarged schematic diagram of point B;

[0032] Figure 4 for Figure 3 Schematic diagram of the removal of refractory bricks and castables;

[0033] Figure 5 for Figure 1 AA cross-sectional diagram of ;

[0034] Figure 6 for Figure 1 BB cross-section diagram;

[0035] Figure 7 This is a top view of the single-chamber side-blown smelting furnace of Example 1.

[0036] In the figure: furnace body 1, furnace hearth 1.1, furnace bottom 1.1.1, furnace hearth end wall 1.1.2, furnace hearth side wall 1.1.3, furnace body 1.2, furnace body end wall 1.2.1, furnace body side wall 1.2.2, reaction zone 1.2.3, depletion zone 1.2.4, furnace chamber 1.3, furnace chamber end wall 1.3.1, furnace chamber side wall 1.3.2, observation port 1.3.3, furnace top 1.4, furnace cover 1.4.1, flue gas outlet 1.4.2, flue gas enclosure 1.4.3, flue gas partition wall 1.4.4, slag partition wall 2, primary air inlet 3, secondary air inlet 4, siphon 5, slag discharge port 6, material discharge port 7, slag channel 8, copper water jacket 9, refractory bricks 10, casting material 11, large dovetail groove 12, small dovetail groove 13, branch pipe 14, oxygen-enriched air main pipe 15. Specific implementation method:

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] Example 1:

[0039] A single-chamber side-blown smelting furnace comprises a furnace body 1, which comprises, from bottom to top, a furnace cylinder 1.1, a furnace body 1.2, a furnace hearth 1.3 and a furnace top 1.4, with a gap left between the furnace hearth 1.3 and the top of the furnace body 1.2. The furnace body 1 is a single-chamber structure, with a slag partition wall 2 vertically arranged between two furnace body side walls 1.2.2 inside the furnace body 1.2. The furnace body 1.2 is penetrated by the slag partition wall 2, separating a reaction zone 1.2.3 and a depletion zone 1.2.4. The length of the reaction zone 1.2.3 is 12,400 mm, and the length of the depletion zone 1.2.4 is 3,000 mm.

[0040] A row of 19 primary air vents 3 is horizontally arranged on each of the two furnace side walls 1.2.2 of the reaction zone 1.2.3; two primary air vents 3 are also arranged on each of the two furnace side walls 1.2.2 in the depletion zone 1.2.4.

[0041] A siphon 5 is provided on the hearth end wall 1.1.2 of the hearth 1.1 away from the lean zone 1.2.4.

[0042] A slag discharge port 6 is provided on the end wall 1.2.1 of the furnace body 1.2, away from the reaction zone 1.2.3. This is a square channel with its front portion extending through the end wall 1.2.1 and its rear portion formed of a copper jacket 9. This jacket covers the entire bottom and sides of the slag discharge port 6, providing resistance to slag erosion, a long service life, and easy cleaning. The bottom of the slag discharge port 6 is 800 mm higher than the bottom of the slag partition 2.

[0043] The furnace top 1.4 includes a furnace cover 1.4.1 and a flue gas outlet 1.4.2 made of a copper water jacket 9. The furnace cover 1.4.1 is located above the reaction zone 1.2.3, and the flue gas outlet 1.4.2 is located above the depletion zone 1.2.4.

[0044] The furnace cover 1.4.1 comprises 12 arched steel water jackets lined with refractory material, which are arranged side by side in the longitudinal direction of the furnace body 1. The furnace cover 1.4.1 is provided with four feed ports 7 and 14 secondary air inlets 4. The feed ports 7 are arranged at intervals on different steel water jackets, and two secondary air inlets 4 are arranged in a group on a steel water jacket without a feed port 7.

[0045] The flue gas outlet 1.4.2 consists of a lower flue gas partition 1.4.4 and an upper flue gas enclosure 1.4.3. Smoke gas partition 1.4.4 is held between the furnace cover 1.4.1 and the furnace sidewalls 1.3.2, extending into and through the furnace 1.3. Smoke gas partition 1.4.4 is made of a copper jacket 9. Its lower portion blocks flue gas and reduces dust production, while its upper portion supports flue gas enclosure 1.4.3, also made of a copper jacket 9.

[0046] The hearth 1.1 is surrounded by a furnace bottom 1.1.1, hearth end walls 1.1.2, and hearth side walls 1.1.3. The hearth 1.1 is 1400 mm deep and 2200 mm wide. The area 300-500 mm downward from the top of the hearth side walls 1.1.3 and the hearth end walls 1.1.2 is built with a mixture of flat copper water jackets and refractory bricks 10.

[0047] The furnace body 1.2 is located on the upper part of the furnace hearth 1.1 and is surrounded by furnace body end walls 1.2.1 and furnace body side walls 1.2.2 made of copper water jackets 9. The furnace body side walls 1.2.2 are divided into a vertically arranged lower furnace body side wall 1.2.2 and an inclined upper furnace body side wall 1.2.2. The top of the lower furnace body side wall 1.2.2 is aligned with the bottom of the upper furnace body side wall 1.2.2, and the top of the upper furnace body side wall 1.2.2 is aligned with the bottom of the furnace chamber 1.3; the height of the furnace body 1.2 is 3000mm, and the cross-section of the furnace body 1.2 is a variable cross-section with a minimum width of 2500mm and a maximum width of 3500mm. A row of primary air inlets 3 made of copper water jackets 9 are embedded in the lower furnace body side walls 1.2.2 on both sides, 200-400mm higher than the bottom surface of the slag partition wall 2; the outer side of the lower part of the furnace body end wall 1.2.1 is built with brick walls.

[0048] The slag partition wall 2 is made up of multiple copper water jackets 9. The surface of the copper water jacket 9 located in the furnace, where the furnace side walls 1.2.2, the furnace end walls 1.2.1 and the slag partition wall 2 are located, is horizontally provided with multiple rows of large dovetail grooves 12, and small dovetail grooves 13 are horizontally provided between adjacent large dovetail grooves 12; refractory bricks 10 are embedded in the large dovetail grooves 12, and the refractory bricks 10 protrude from the corresponding surface of the copper water jacket 9. The grooves formed between adjacent refractory bricks 10 and the small dovetail grooves 13 are filled with casting material 11; an arched slag channel 8 is provided in the middle of the bottom of the slag partition wall 2.

[0049] The furnace 1.3 is surrounded by a furnace end wall 1.3.1 and a furnace side wall 1.3.2. The inner side of the furnace side wall 1.3.2 is stepped. The furnace side wall 1.3.2 and the furnace end wall 1.3.1 below the flue gas outlet 1.4.2 are higher than the furnace cover 1.4.1. The furnace has a height of 3000-4000 mm and a width of 3500-4500 mm. The area 1000-2000 mm above the bottom of the furnace side wall 1.3.2 and the furnace end wall 1.3.1 is constructed entirely of a flat copper water jacket and refractory bricks. The furnace end wall 1.3.1 located below the flue gas outlet 1.4.2 is entirely constructed of a flat copper water jacket and refractory bricks. An observation port 1.3.3 is provided on the furnace end wall 1.3.1 away from the flue gas outlet 1.4.2, and a row of secondary air inlets 4 is provided on each of the two furnace side walls 1.3.2.

[0050] A gap is left between the furnace body 1.2 and the furnace chamber 1.3 to absorb the expansion of the furnace body after heating. Compressible refractory material is filled in the gap to prevent smoke from escaping.

[0051] Additional notes:

[0052] 1. Flat copper water jacket and refractory bricks 10 are mixedly laid in the furnace wall. Several layers of flat copper water jacket with the same thickness as the refractory bricks 10 are laid in the furnace wall. The flat copper water jacket and the refractory bricks 10 are bonded as a whole by refractory mud. There is no need to set up a mechanism to support or fix the flat copper water jacket. 2-5 layers of refractory bricks 10 are laid between every two layers of flat copper water jacket. The width of the flat copper water jacket shall not be greater than the thickness of the furnace wall and shall not be less than 300mm.

[0053] 2. The copper water jacket 9 includes various shapes and structures, including: a flat copper water jacket built into the furnace wall; a special-shaped copper water jacket assembled to form the furnace end wall 1.2.1, the furnace side wall 1.2.2 and the slag partition wall 2 and with a large dovetail groove 12 and a small dovetail groove 13 on the surface; a frustum-shaped copper water jacket integrally formed to form the primary tuyere 3; a flat copper water jacket assembled to form the flue gas partition wall 1.4.4; a flat copper water jacket assembled to form the flue gas enclosure 1.4.3, etc.

[0054] Example 2:

[0055] Smelting copper concentrate using the single-chamber side-blown smelting furnace described in Example 1 includes metering and batching the copper concentrate, fuel, and quartz flux before transporting them to the reaction zone 1.2.3; blasting a metered amount of oxygen-enriched air through the primary tuyere 3 into the slag layer of the reaction zone 1.2.3, vigorously stirring the melt above the primary tuyere 3 to rapidly complete melting, oxidation, and slagging of the charge. The matte, which has a high density, falls into the furnace hearth 1.1 to form a matte layer, while the slag, which has a low density, floats on top of the matte layer to form a slag layer. Smelting fumes generated by the reaction enter the space above the melt.

[0056] The slag below the primary air inlet 3 in the reaction zone 1.2.3 enters the depletion zone 1.2.4 in the furnace body 1.2 through the bottom of the slag partition wall 2 under the action of siphoning. The slag is further depleted during the bottom-up flow and diffusion process, thereby reducing the copper content in the slag. The depleted slag rises to the slag discharge port 6 and is continuously discharged by overflow.

[0057] The matte falling into the lower part of the furnace cylinder 1.1 is continuously discharged through the siphon channel 5. The height of the matte layer is made lower than the slag partition wall 2 by adjusting the height of the siphon channel 5 according to the composition of the matte and slag and the height of the slag discharge port 6.

[0058] The smelting flue gas from the reaction zone 1.2.3 enters the flue gas channel in the furnace (the space below the furnace cover 1.4.1 and above the melt liquid level), enters the waste heat boiler through the flue gas outlet 1.4.2 and the flue located above it, and the secondary air supply is blown into the furnace through the secondary air port 4 of the furnace side wall 1.3.2 and the furnace cover 1.4.1. The elemental sulfur and flammable substances in the flue gas are mixed with the secondary air supply and burned.

[0059] The secondary air blown in through the secondary air inlet 4 located at the furnace top 1.4 enables the suspended particles and liquid droplets in the flue gas to gain downward momentum, thereby reducing the smoke dust rate.

[0060] The air volume of the secondary air distribution is controlled by the residual oxygen rate of the flue gas measured at the boiler outlet.

[0061] In this embodiment, the main components of the copper concentrate are: copper content 22%, iron content 27%, sulfur content 30%, and silicon dioxide content 10%;

[0062] The main components of quartz flux: silicon dioxide content 95%;

[0063] The main components of the fuel: fixed carbon content 83%;

[0064] The oxygen concentration of oxygen-enriched air is 85%, and the oxygen concentration of secondary air is 20%;

[0065] The copper concentrate feed rate for each reaction zone 1.2.3 is about 128t / h, the quartz flux feed rate for each reaction zone 1.2.3 is about 5t / h, and the primary air volume for each reaction zone 1.2.3 is 28000-32000Nm 3 / h;

[0066] Control the matte grade to 75%, the iron-silicon ratio of the blowing slag to 2; control the furnace temperature to 1300-1350℃, the fuel rate to 1.5-2%; control the primary air blast pressure to 0.12MPa, the secondary air blast pressure to 20kPa, the residual oxygen rate to 3%, and the secondary air volume to 20000-30000Nm 3 / h.

[0067] After smelting, the output of 75% grade matte is about 1,700t / d, the slag output is 3,000-3,500t / d, the slag contains 2% copper and the smoke rate is 1.5%.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A single-chamber side-blown smelting furnace, comprising a furnace body, wherein the furnace body comprises, from bottom to top, a furnace cylinder, a furnace body, a furnace hearth, and a furnace top; characterized in that: The furnace body is a single-chamber structure, and a slag partition wall is vertically arranged between the two furnace body side walls inside the furnace body. The furnace body is penetrated by the slag partition wall, separating a reaction zone and a depletion zone. The length ratio between the reaction zone and the depletion zone is 1:0.2-0.3; Primary tuyere is horizontally arranged on the two side walls of the furnace in the reaction zone; A siphon channel is provided on the end wall of the furnace away from the depletion zone, and a slag discharge port is provided on the end wall of the furnace away from the reaction zone; The furnace top includes a furnace cover and a flue gas outlet, wherein the furnace cover is located above the reaction zone, and the flue gas outlet is located above the depletion zone; The furnace cover includes several arched steel water jackets lined with refractory materials, the steel water jackets are arranged side by side in the length direction of the furnace body, and the furnace cover is provided with several feed openings and secondary air inlets, the feed openings are arranged at intervals on different steel water jackets, and two secondary air inlets are arranged in a group on a steel water jacket without a feed opening; The furnace body is surrounded by furnace body side walls and furnace body end walls made of a copper water jacket. The furnace body side walls are divided into a vertically arranged lower furnace body side wall and an inclined upper furnace body side wall. The top of the lower furnace body side wall is aligned with the bottom of the upper furnace body side wall, and the top of the upper furnace body side wall is aligned with the bottom of the furnace chamber. A row of primary air vents is embedded in each lower furnace body side wall at a position 200-400 mm higher than the bottom surface of the slag partition wall. The outer side of the lower part of the furnace body end wall is built with a brick wall. The slag partition wall is made of multiple copper water jackets. The copper water jacket surfaces of the furnace side walls, the furnace end walls, and the slag partition wall located in the furnace are horizontally provided with multiple rows of large dovetail grooves, and small dovetail grooves are horizontally provided between adjacent large dovetail grooves. Refractory bricks are embedded in the large dovetail grooves, and the refractory bricks protrude from the corresponding copper water jacket surfaces. The grooves formed between adjacent refractory bricks and the small dovetail grooves are filled with casting material. A gap is left between the furnace chamber and the top of the furnace body.

2. The single-chamber side-blown smelting furnace according to claim 1, characterized in that: The hearth is surrounded by a furnace bottom, hearth end walls and hearth side walls. The area 300-500 mm downward from the top of the hearth side walls and the hearth end walls is built with a mixture of flat copper water jackets and refractory bricks.

3. The single-chamber side-blown smelting furnace according to claim 1, characterized in that: An arched slag channel is provided in the middle of the bottom of the slag partition wall.

4. The single-chamber side-blown smelting furnace according to claim 1, characterized in that: The slag discharge port is made of a copper water jacket, and the bottom surface of the slag discharge port is 600-900 mm higher than the bottom surface of the slag partition wall.

5. The single-chamber side-blown smelting furnace according to claim 3, characterized in that: A primary tuyere is also provided on the side wall of the furnace body in the depletion zone.

6. The single-chamber side-blown smelting furnace according to claim 1, characterized in that: The furnace is surrounded by a furnace end wall and a furnace side wall. The inner side of the furnace side wall is stepped. The furnace side wall and the furnace end wall below the flue gas outlet are higher than the furnace cover. The area 1000-2000 mm upward from the bottom of the furnace side wall and the furnace end wall is built with a flat copper water jacket and refractory bricks. The furnace end wall located below the flue gas outlet is entirely built with a copper water jacket and refractory bricks. An observation port is provided on the furnace end wall away from the flue gas outlet, and a row of secondary air outlets is provided on each of the two furnace side walls.

7. The single-chamber side-blown smelting furnace according to claim 6, characterized in that: The flue gas outlet is a copper water jacket structure consisting of a lower flue gas partition wall and an upper flue gas surrounding wall. The flue gas partition wall is clamped by the furnace cover and the furnace side wall, extending into and passing through the furnace.

8. The single-chamber side-blown smelting furnace according to claim 2 or 6, characterized in that: The mixed masonry of flat copper water jacket and refractory bricks is to build several layers of flat copper water jacket with the same thickness as the refractory bricks into the furnace wall. The flat copper water jacket and refractory bricks are bonded as a whole by refractory mud. There is no need to set up a mechanism to support or fix the flat copper water jacket. 2-5 layers of refractory bricks are built between every two layers of flat copper water jacket. The width of the flat copper water jacket is not greater than the thickness of the furnace wall and not less than 300mm.

Images