Production process of low-carbon brick for high-strength VOD (Vacuum Oxygen Decarburization) steel ladle

Abstract

The invention provides a production process of a high-strength low-carbon brick for a VOD steel ladle, which comprises the following steps: S1, layered filling: mixing magnesia carbon brick particles, fused magnesia, spinel, silicon carbide powder and activated aluminum oxide to form a main material, adding the main material into an outer material cavity shell, mixing the main material with a small amount of carbon powder, adding the mixture into a transition material cavity shell, and uniformly stirring; the carbon powder content is increased, and the mixture is mixed with the main material and then added into the inner material cavity shell; s2, bricks are pressed, the powder with different carbon contents is controlled by a discharging valve assembly and sequentially enters a brick pressing cavity through a material receiving assembly, an annular layered structure is formed, and after filling is completed, a translation assembly moves the brick pressing cavity to the position below an extrusion mechanism for pre-stamping; and S3, brick collection, specifically, after low-carbon bricks are pressed and formed, the low-carbon bricks are pushed out and collected through a push-out assembly.The layered discharging mechanism is arranged, powder materials with different carbon contents are placed on the material distributing assembly, carbon migration is avoided, the brick performance is enhanced, a discharging valve is matched with the material receiving assembly, and the carbon-containing layers of brick bodies are combined more firmly.

Description

Technical Field

[0001] The present invention relates to the technical field of refractory materials, and particularly to a production process of low-carbon bricks for high-strength VOD ladles. Background Art

[0002] Due to the smelting technical requirements of special steels such as low-carbon stainless steel, it is difficult for high-carbon products to meet the technical indicators for smelting low-carbon steel. Steel mills need a kind of low-carbon or carbon-free refractory product to replace conventional magnesia-carbon refractory products. In order to actively respond to the market, our company began to research and develop high-strength low-carbon bricks for VOD ladles. This product must have good erosion resistance and resistance to structural spalling. Therefore, it is necessary to develop a product that can better improve the purity and heat preservation performance of molten steel, and also greatly improve the resistance to slag penetration and resistance to structural spalling.

[0003] Chinese Patent CN100551876C discloses a super-low-carbon ladle slag line magnesia-carbon brick and its production method to solve the problem of molten steel carburization. The technical solution adopted is that the super-low-carbon ladle slag line magnesia-carbon brick is made of the following raw materials by weight percentage: the weight percentages of fused magnesia of four particle sizes are 15-25%, 26-40%, 16-30%, and 2-12% respectively; graphite 0.5-1.5%; magnesium powder, aluminum powder or magnesium-aluminum alloy powder 1-3%; carbon 0.2-0.8%; phenolic resin 2.2-2.5%. The production method is: put the fused magnesia into a mixer and mix for 1-2 minutes, then add phenolic resin and mix for 5-10 minutes; then add graphite, fused magnesia with a particle size <0.074mm, and magnesium powder, aluminum powder or magnesium-aluminum alloy powder and mix for 5-10 minutes; then add carbon and mix for 3-5 minutes; after discharging, let it sit for 2 hours; and form it with a press. The present invention has low cost, a carbon content lower than 3%, and the carburization of molten steel is only about 4PPM.

[0004] However, in the actual use process, it is found that although this kind of brick can solve the problem of molten steel carburization to a certain extent, it is still inevitable for carbon to come into contact with molten steel, resulting in limited improvement in the purity of molten steel. Even if the carbon migration amount is reduced, in the production of special steels with extremely strict requirements for steel quality, trace carbon migration will still interfere with the microstructure of steel and affect key performance indicators such as the toughness, strength, and corrosion resistance of steel. Summary of the Invention

[0005] The object of the present invention is to address the deficiencies of the prior art and provide a production process for low-carbon bricks for high-strength VOD ladles. Through the cooperation of the material distribution component and the feeding valve component in the layered feeding mechanism, the function of sequentially feeding powders with different carbon contents in layers is achieved, solving the problems of carbon migration in existing low-carbon bricks affecting the purity of molten steel and the instability of the internal structure of the brick body; through the cooperation of the material receiving component and the feeding valve component, the function of receiving and compacting the falling powders is achieved, avoiding the peeling caused by uneven compaction between different carbon-containing layers of the brick body and improving the overall quality of the brick body; through the cooperation of the translation component and the extrusion mechanism in the position-changing mechanism, the function of quickly and automatically switching between the feeding and extrusion processes is achieved, solving the problem of low production efficiency, and thus achieving the effects of improving product quality and production efficiency.

[0006] To achieve the above object, the present invention provides the following technical solutions: A production process for low-carbon bricks for high-strength VOD ladles, comprising the following steps: S1. Layered filling: Mix magnesia-carbon brick particles, fused magnesia, spinel, silicon carbide powder, and activated alumina to form the main material and add it to the outer material cavity shell. Then, mix a small amount of carbon powder with the main material and add it to the transition material cavity shell. Increase the carbon powder content and mix it with the main material before adding it to the inner material cavity shell. S2. Pressing into bricks: Powders with different carbon contents are controlled by the feeding valve component and sequentially enter the brick pressing cavity through the material receiving component to form an annular layered structure. After the filling is completed, the translation component moves the brick pressing cavity below the extrusion mechanism for pre-stamping. S3. Brick collection: After the low-carbon bricks are pressed and formed, they are pushed out and collected by the pushing component.

[0007] The present invention also provides a production device adapted to the production process for low-carbon bricks for high-strength VOD ladles, including: a layered feeding mechanism, and the layered feeding mechanism includes: a vertical movement component, a material distribution component arranged on the vertical movement component, a feeding valve component arranged on the vertical movement component, and a material receiving component arranged on the vertical movement component; The material distribution component stores powders with different carbon contents. When feeding work is carried out, the feeding valve component is opened in sequence to release powders with different carbon contents, and the material receiving component receives the powders to form a layered structure.

[0008] Preferably, for the vertical movement component, the vertical movement component includes: A mounting seat, and the mounting seat is arranged on the machine body; A first sliding rod, and the first sliding rod is arranged on the mounting seat; A sliding seat, and the sliding seat is slidably arranged on the first sliding rod; A lead screw, which is in threaded fit with the threaded hole on the sliding seat; A driving motor, the output shaft of which is in transmission connection with the lead screw.

[0009] Preferably, the material distribution component includes: An outer material chamber shell, which is arranged on the sliding seat; An intermediate material chamber shell, which is arranged inside the outer material chamber shell; An inner material chamber shell, which is arranged inside the intermediate material chamber shell; A first connecting plate, which is used to connect the outer material chamber shell, the intermediate material chamber shell and the inner material chamber shell.

[0010] Preferably, the blanking valve component includes: A mounting plate, which is arranged on the sliding seat; A second sliding rod, and multiple groups of the second sliding rods are arranged on the mounting plate; A bidirectional lead screw, and multiple groups of the bidirectional lead screws are arranged on the mounting plate; Motors, and multiple groups of motors are provided, and the output shafts are respectively in transmission connection with the bidirectional lead screws; A sliding plate, which is slidably arranged on the second sliding rod and is symmetrically arranged; An outer semi-circular plate, which is arranged on the sliding plate; A middle semi-circular plate, which is arranged on the sliding plate and is located below the outer semi-circular plate; An inner semi-circular plate, which is arranged on the sliding plate and is located below the middle semi-circular plate.

[0011] Preferably, the material receiving component includes: A connecting rod, which is arranged on the sliding seat; A housing, which is arranged on the connecting rod; An inflatable cavity, which is arranged inside the housing and is connected to the housing through a second connecting plate; An annular airbag, which is arranged at the bottom of the inflatable cavity; An air pump, which is installed on the sliding seat; An air delivery pipe, which communicates the air outlet of the air pump and the inner cavity of the inflatable cavity.

[0012] Preferably, it further includes: an extrusion mechanism, and the extrusion mechanism includes: A hydraulic cylinder, which is arranged on the machine body; An extended pressure rod, and the extended pressure rod is connected to the ejector rod of the hydraulic cylinder through a connecting member.

[0013] Preferably, it further includes: a transposition mechanism, and the transposition mechanism includes: A translation assembly, and the translation assembly is arranged on the machine body; A pushing-out assembly, and the pushing-out assembly is arranged on the machine body; By changing the position of the translation assembly, the switching between blanking and extrusion is realized, and after the low-carbon brick is formed, the brick is pushed out and collected by the pushing-out assembly.

[0014] Preferably, the translation assembly includes: A chute, and the chute is opened at the bottom of the machine body; A sliding base, and the sliding base is slidably arranged inside the chute; A translation hydraulic rod, and the translation hydraulic rod is arranged on the machine body; A brick pressing cavity, and the brick pressing cavity is arranged on the sliding base.

[0015] Preferably, the pushing-out assembly includes: A brick-pushing hydraulic rod, and the brick-pushing hydraulic rod is arranged at the bottom of the brick pressing cavity; A push plate, and the push plate is connected to the ejector rod of the brick-pushing hydraulic rod.

[0016] The beneficial effects of the present invention are as follows: (1) By setting a layered blanking mechanism in the present invention, powders with different carbon contents are placed in the material distribution component, which can not only increase the strength and thermal shock resistance of the bricks by adding carbon, but also avoid the migration of carbon in the bricks to the molten steel and pollute the molten steel because there is no carbon on the outside of the low-carbon bricks. Among them, the carbon content placed in the transition material cavity shell is less to increase the gradient transition layer and avoid the separation of the carbon-containing layer caused by the too large difference in the thermal expansion coefficients of carbon and bricks.

[0017] (2) By setting a blanking valve component in the present invention, powders with different carbon contents can be controlled to be sequentially blanked and fall into the material receiving component to form a layered structure. Among them, when the air pump inflates the inflation cavity, the annular airbag will inflate and expand, and then squeeze the powders falling from the transition material cavity shell with less carbon. After being compacted, the powders falling from the inner material cavity shell are filled again, making the bonding between different carbon-containing layers of the brick body more firm and avoiding the problem of falling off caused by uneven compaction.

[0018] (3) By setting a transposition mechanism in the present invention, the automatic and rapid switching between blanking and extrusion is realized through the translation assembly, and when multiple stamping operations are performed, the process connection time is greatly reduced.

[0019] In summary, the present invention has the advantages of improving product quality, production efficiency, etc. Description of the Drawings

[0020] Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the lengthened pressure rod structure of the present invention; Figure 3 Schematic diagram of the outer material cavity shell structure of the present invention; Figure 4 Schematic diagram of the layered blanking mechanism structure of the present invention; Figure 5 Schematic diagram of the vertical moving component structure of the present invention; Figure 6 Schematic diagram of the blanking valve component structure of the present invention; Figure 7 Schematic diagram of the material distribution component structure of the present invention; Figure 8 Schematic diagram of the sectional view of the outer material cavity shell of the present invention; Figure 9 Schematic diagram of the material receiving component structure of the present invention; Figure 10 Schematic diagram of the sectional view of the outer shell of the present invention; Figure 11 Schematic diagram of the translation component structure of the present invention; Figure 12 Schematic diagram of the brick pushing hydraulic rod structure of the present invention; Figure 13 Schematic diagram of the sectional view of the brick pressing cavity of the present invention; Figure 14 Process flow chart of the present invention; Figure 15 Sectional view structure diagram of the low-carbon brick of the present invention.

[0021] In the figure: 100, machine body; 1, layered blanking mechanism; 11, vertical moving component; 111, mounting seat; 112, first sliding rod; 113, sliding seat; 114, lead screw; 115, driving motor; 12, material distribution component; 121, outer material cavity shell; 122, transition material cavity shell; 123, inner material cavity shell; 124, first connecting plate; 13, blanking valve component; 131, mounting plate; 132, second sliding rod; 133, bidirectional lead screw; 134, motor; 135, sliding plate; 136, outer semi-circular plate; 137, middle semi-circular plate; 138, inner semi-circular plate; 14, material receiving component; 141, connecting rod; 142, outer shell; 143, inflatable cavity; 144, second connecting plate; 145, annular airbag; 146, air pump; 147, air delivery pipe; 2, extrusion mechanism; 201, hydraulic cylinder; 202, lengthened pressure rod; 3. Transposition mechanism; 31. Translation component; 311. Slide groove; 312. Sliding base; 313. Translation hydraulic rod; 314. Brick pressing cavity; 32. Pushing component; 321. Brick pushing hydraulic rod; 322. Pushing plate. Detailed implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0024] Embodiment 1 As Figure 14 shown, this embodiment provides a production process for low-carbon bricks for high-strength VOD ladles, including the following steps: S1. Layered filling: Mix magnesia-carbon brick particles, fused magnesia, spinel, silicon carbide powder, and activated alumina to form the main material and add it to the outer material cavity shell 121. Then, add a small amount of carbon powder to the main material and add it to the transition material cavity shell 122. Increase the carbon powder content and mix it with the main material before adding it to the inner material cavity shell 123. S2. Brick pressing: The powders with different carbon contents are controlled by the feeding valve assembly 13 and sequentially enter the brick pressing cavity 314 through the receiving assembly 14 to form an annular layered structure. After the filling is completed, the translation component 31 moves the brick pressing cavity 314 below the extrusion mechanism 2 for pre-stamping. S3. Brick collection: After the low-carbon bricks are pressed and formed, they are pushed out and collected by the pushing component 32.

[0025] Preferably, the specific formula is as follows:

[0026] VOD is a steelmaking process, mainly a vacuum oxygen decarburization process for producing high-quality stainless steel and special steel. This process is mainly used to reduce the carbon content in molten steel. At the same time, by continuously blowing oxygen, the molten steel is fully stirred, and through vacuum pumping, the harmful elements in the molten steel are effectively reduced. Under vacuum conditions, the gases (such as hydrogen and nitrogen) in the molten steel are also effectively removed, resulting in high-purity steel.

[0027] The above formula is for bundled materials (about 24 hours). The required raw materials are prepared in advance according to particle size requirements and enter the production material bin. During the production process, it must be ensured that the materials are added according to the mass ratio of the formula and there is no mixing with other materials.

[0028] The physical and chemical index requirements of the obtained product are as follows:

[0029] Example 2 As Figures 1 to 4 shown, where the same or corresponding components as in Example 1 adopt the corresponding reference numerals in Example 1. For the sake of simplicity, only the differences from Example 1 will be described below. The difference between this Example 2 and Example 1 is that: This example provides an apparatus for a production process of forming a low-carbon brick for a high-strength VOD ladle, including: a layered feeding mechanism 1, and the layered feeding mechanism 1 includes: a vertical moving component 11, a material distributing component 12 arranged on the vertical moving component 11, a feeding valve component 13 arranged on the vertical moving component 11, and a material receiving component 14 arranged on the vertical moving component 11; The material distributing component 12 stores powders with different carbon contents. When the feeding work is carried out, the feeding valve component 13 is opened in sequence to release powders with different carbon contents, and the material receiving component 14 receives the powders to form a layered structure.

[0030] In this embodiment, by setting up a layered unloading mechanism 1, the function of loading powders with different carbon contents in layers in a specific order to form a low-carbon brick blank is realized, thereby achieving the effect of meeting the carbon content requirements of different parts of the low-carbon brick and improving the comprehensive performance of the low-carbon brick. The vertical moving component 11 in the layered unloading mechanism 1 cooperates with the dividing component 12, the unloading valve component 13, and the receiving component 14. The vertical moving component 11 provides vertical movement power for other components, so that each component can perform corresponding operations at different heights; the dividing component 12 cooperates with the unloading valve component 13, and the dividing component 12 provides powders with different carbon contents to the unloading valve component 13, and the unloading valve component 13 controls the release of the powder; the unloading valve component 13 cooperates with the receiving component 14, and the receiving component 14 receives the powder released by the unloading valve component 13 and forms a layered structure, and compacts it to form a tight structure, thereby achieving a more firm bond between the carbon-containing layers of the low-carbon brick.

[0031] Further, if Figures 5 to 6 As shown, the vertical moving assembly 11 includes: A mounting seat 111, wherein the mounting seat 111 is disposed on the body 100; A first sliding bar 112, wherein the first sliding bar 112 is disposed on the mounting seat 111; A sliding seat 113, wherein the sliding seat 113 is slidably disposed on the first sliding rod 112; A screw rod 114, wherein the screw rod 114 is threadedly engaged with a threaded hole on the sliding seat 113; The drive motor 115 has an output shaft drivingly connected to the screw rod 114 .

[0032] In this embodiment, by setting up a vertical moving component 11, the function of driving the material dividing component 12, the material unloading valve component 13 and the material receiving component 14 to move vertically is realized, thereby achieving the effect of adjusting the height of each component so that it can be in a suitable position in different processes, meeting the needs of layered filling, precise unloading and effective material receiving.

[0033] Specifically, the output shaft of the driving motor 115 is in transmission connection with the lead screw 114. When the driving motor 115 starts to operate, the output shaft drives the lead screw 114 to rotate. The lead screw 114 is in threaded fit with the threaded hole on the sliding seat 113. The rotation of the lead screw 114 causes the sliding seat 113 to move linearly in the up and down direction under the action of the thread along the first slide bar 112. The first slide bar 112 cooperates with the sliding seat 113. The first slide bar 112 provides a guiding function for the movement of the sliding seat 113, enabling the sliding seat 113 to move stably only along the direction of the first slide bar 112, avoiding shaking and deviation, and ensuring that the material distribution component 12, the blanking valve component 13, and the material receiving component 14 installed on the sliding seat 113 can accurately reach the required height position. The mounting seat 111 is arranged on the machine body 100, which provides a stable mounting foundation for the first slide bar 112, enabling the first slide bar 112 to stand firmly on the machine body, thereby ensuring the stable operation of the entire vertical movement component 11.

[0034] Further, as Figures 7 to 8 shown, the material distribution component 12 includes: An outer material cavity shell 121, and the outer material cavity shell 121 is arranged on the sliding seat 113; An intermediate material cavity shell 122, and the intermediate material cavity shell 122 is arranged inside the outer material cavity shell 121; An inner material cavity shell 123, and the inner material cavity shell 123 is arranged inside the intermediate material cavity shell 122; A first connecting plate 124, and the first connecting plate 124 is used to connect the outer material cavity shell 121, the intermediate material cavity shell 122, and the inner material cavity shell 123.

[0035] In this embodiment, by setting the material distribution component 12, the function of storing powders with different carbon contents and providing materials for blanking is realized, and further, the effect of meeting the carbon content requirements of different parts of the low-carbon bricks is achieved, providing a basis for producing low-carbon bricks that meet the requirements.

[0036] Specifically, the outer material chamber housing 121 is arranged on the sliding seat 113. The movement of the sliding seat 113 can drive the outer material chamber housing 121 to move to a suitable material discharging position. The outer material chamber housing 121 stores the carbon-free powder material, providing materials for the outer layer of the low-carbon brick. The transition material chamber housing 122 is arranged inside the transition material chamber housing 122. The powder material stored in the transition material chamber housing 122 has a carbon content at an intermediate transition level, providing materials for the transition part between the inner and outer layers of the low-carbon brick. This setting helps to alleviate the difference in the thermal expansion coefficients of carbon and the brick, avoiding delamination inside the brick. The inner material chamber housing 123 stores the powder material with a relatively high carbon content, enhancing the strength and thermal shock resistance of the brick, etc., and providing materials for the inner layer of the low-carbon brick. Together with the outer material chamber housing 121 and the transition material chamber housing 122, they constitute a layered storage structure for powder materials with different carbon contents. The first connecting plate 124 is used to connect the outer material chamber housing 121, the transition material chamber housing 122, and the inner material chamber housing 123. It fixes the relative positions of these three material chamber housings, preventing shaking or displacement between the material chamber housings during the operation of the equipment, and ensuring the stability and accuracy of powder material storage and discharging.

[0037] It should be noted that the outermost layer of the low-carbon brick contains no carbon, the innermost layer has the most carbon content, and the middle is the transition layer with a carbon content between the two.

[0038] Furthermore, as Figures 5 to 6 shown, the material discharging valve assembly 13 includes: A mounting plate 131, and the mounting plate 131 is arranged on the sliding seat 113; A second sliding rod 132, and multiple groups of the second sliding rods 132 are arranged on the mounting plate 131; A bidirectional lead screw 133, and multiple groups of the bidirectional lead screws 133 are arranged on the mounting plate 131; A motor 134, and multiple groups of the motors 134 are arranged, and the output shafts are respectively in transmission connection with the bidirectional lead screws 133; A sliding plate 135, and the sliding plate 135 is slidably arranged on the second sliding rod 132 and is symmetrically arranged; An outer semi-circular plate 136, and the outer semi-circular plate 136 is arranged on the sliding plate 135; A middle semi-circular plate 137, and the middle semi-circular plate 137 is arranged on the sliding plate 135 and is located below the outer semi-circular plate 136; An inner semi-circular plate 138, and the inner semi-circular plate 138 is arranged on the sliding plate 135 and is located below the middle semi-circular plate 137.

[0039] In this embodiment, through the material discharging valve assembly 13, the function of controlling the sequential discharging of powder materials with different carbon contents is realized, and further the effect of enabling the powder materials to form a layered structure in the material receiving assembly 14 and meeting the carbon content requirements of different parts of the low-carbon brick is achieved.

[0040] Specifically, multiple sets of motors 134 are provided, and the output shafts are respectively in transmission connection with the bidirectional lead screws 133. When the motors 134 start to operate, the output shafts drive the bidirectional lead screws 133 to rotate. Multiple sets of bidirectional lead screws 133 are provided on the mounting plate 131, and the mounting plate 131 is arranged on the sliding seat 113, which enables the bidirectional lead screws 133 to have stable support and installation positions. The sliding plate 135 is slidably arranged on the second slide bar 132 and is symmetrically arranged. When the bidirectional lead screw 133 rotates, due to the characteristics of its double-thread, it will drive the symmetrical sliding plates 135 to move linearly towards or away from each other along the second slide bar 132. Multiple sets of second slide bars 132 are provided on the mounting plate 131, providing a guiding function for the sliding of the sliding plate 135 and ensuring the stability and accuracy of the movement of the sliding plate 135. The outer semi-circular plate 136 is arranged on the sliding plate 135. When the sliding plate 135 moves, the outer semi-circular plate 136 will move accordingly, thereby controlling the feeding of the powder in the outer material cavity shell 121. The middle semi-circular plate 137 is arranged on the sliding plate 135 and is located below the outer semi-circular plate 136, and also moves with the sliding plate 135 to control the feeding of the powder in the transition material cavity shell 122. The inner semi-circular plate 138 is arranged on the sliding plate 135 and is located below the middle semi-circular plate 137, and its movement controls the feeding of the powder in the inner material cavity shell 123. In this way, the feeding sequence and feeding amount of powders with different carbon contents can be accurately controlled, and the layered falling of the powders can be realized.

[0041] Further, as Figures 9 to 10 shown, the receiving assembly 14 includes: a connecting rod 141, the connecting rod 141 is arranged on the sliding seat 113; a housing 142, the housing 142 is arranged on the connecting rod 141; an inflatable cavity 143, the inflatable cavity 143 is arranged inside the housing 142 and is connected to the housing 142 through a second connecting plate 144; a ring-shaped airbag 145, the ring-shaped airbag 145 is arranged at the bottom of the inflatable cavity 143; an air pump 146, the air pump 146 is installed on the sliding seat 113; an air delivery pipe 147, the air delivery pipe 147 connects the air outlet of the air pump 146 and the inner cavity of the inflatable cavity 143.

[0042] In this embodiment, by providing the receiving assembly 14, the function of receiving powders with different carbon contents and compacting them to form a tight structure is realized, and further, the effect of making the carbon-containing layers of the low-carbon bricks combine more firmly and improving the overall quality of the brick body is achieved.

[0043] Specifically, the sliding seat 113 cooperates with the connecting rod 141. The sliding seat 113 provides an installation position for the connecting rod 141. The connecting rod 141 transmits the supporting force of the sliding seat 113 to the outer shell 142, enabling the outer shell 142 to be stably in the working position, ensuring that the material receiving assembly 14 can accurately receive the powder at the corresponding position. The second connecting plate 144 connects the outer shell 142 and the inflatable cavity 143, fixing their relative positions, preventing the inflatable cavity 143 from shaking or displacing during the operation of the equipment, and ensuring the normal operation of the inflatable cavity 143. The air pump 146 cooperates with the air delivery pipe 147. After the air pump 146 is started, air is delivered into the inflatable cavity 143 through the air delivery pipe 147. When the inflatable cavity 143 is filled with gas, the gas squeezes the annular airbag 145, causing the annular airbag 145 to expand. After the annular airbag 145 expands, it exerts a squeezing effect on the powder falling into the material receiving assembly 14, first compacting the powder falling from the over-material cavity shell 122 with less carbon content, and then filling the powder falling from the inner material cavity shell 123. This makes the bonding between different carbon-containing layers of the brick body more firm, avoiding the problem of shedding caused by uneven compaction, and greatly improving the quality of the low-carbon brick.

[0044] Furthermore, as Figures 1 to 2 shown, it further includes: an extrusion mechanism 2, and the extrusion mechanism 2 includes: a hydraulic cylinder 201, and the hydraulic cylinder 201 is arranged on the machine body 100; an extended pressure rod 202, and the extended pressure rod 202 is connected to the ejector rod of the hydraulic cylinder 201 through a connecting member.

[0045] In this embodiment, by setting the extrusion mechanism 2 and cooperating with the transposition mechanism 3 to move the brick pressing cavity 314, the function of stamping and forming the brick pressing cavity 314 filled with powder is realized, and further the effect of compacting powders with different carbon contents into high-strength low-carbon bricks is achieved.

[0046] Specifically, the machine body 100 cooperates with the hydraulic cylinder 201. The machine body 100 provides installation support for the hydraulic cylinder 201, enabling the hydraulic cylinder 201 to be stably fixed in a suitable position, ensuring that it does not shake during operation, and providing a stable basis for subsequent stamping work. The ejector rod of the hydraulic cylinder 201 cooperates with the connecting member. The connecting member connects the ejector rod of the hydraulic cylinder and the extended pressure rod 202. When the ejector rod of the hydraulic cylinder 201 expands and contracts, the connecting member can stably transmit the power to the extended pressure rod 202, ensuring the stability and accuracy of power transmission. The connecting member cooperates with the extended pressure rod 202. By the connecting member, the movement of the ejector rod of the hydraulic cylinder 201 is transmitted to the extended pressure rod, enabling the extended pressure rod 202 to stamp the powder in the brick pressing cavity 314 according to the action of the hydraulic cylinder 201, compacting the powders with different carbon contents filled in layers into low-carbon bricks with a certain strength and shape, and improving the forming quality of the low-carbon bricks.

[0047] Furthermore, asFigures 11 to 13 As shown, it further includes: a transposition mechanism 3, and the transposition mechanism 3 includes: a translation component 31, and the translation component 31 is arranged on the machine body 100; a pushing component 32, and the pushing component 32 is arranged on the machine body 100; The translation component 31 switches between blanking and extrusion by changing its position, and after the low-carbon bricks are formed, the bricks are pushed out and collected by the pushing component 32.

[0048] In this embodiment, through the translation component 31 and the pushing component 32 in the transposition mechanism 3, the automatic switching of the blanking and extrusion processes and the collection function of the formed bricks are realized, and multiple stampings can be automatically achieved, thereby achieving the effects of improving production efficiency, reducing manual operations, and ensuring the continuity of the production process.

[0049] Furthermore, as Figures 11 to 12 shown, the translation component 31 includes: a sliding groove 311, and the sliding groove 311 is opened at the bottom of the machine body 100; a sliding base 312, and the sliding base 312 is slidably arranged inside the sliding groove 311; a translation hydraulic rod 313, and the translation hydraulic rod 313 is arranged on the machine body 100; a brick pressing cavity 314, and the brick pressing cavity 314 is arranged on the sliding base 312.

[0050] In this embodiment, by arranging the translation component 31, the function of moving the brick pressing cavity 314 between different process positions is realized, thereby achieving the effects of automatically switching the blanking and extrusion processes and improving production efficiency.

[0051] The translation component 31 cooperates with the machine body 100. The machine body 100 provides installation support for the translation component 31 to ensure its stable operation; the sliding groove 311 cooperates with the sliding base 312 to provide guidance for the movement of the sliding base 312; the translation hydraulic rod 313 cooperates with the sliding base 312 to provide power for the movement of the sliding base 312; the sliding base 312 cooperates with the brick pressing cavity 314 to drive the brick pressing cavity 314 to move, so that the brick pressing cavity 314 can play a role in different processes.

[0052] Specifically, the chute 311 defines the trajectory for the movement of the sliding base 312. Such a cooperation ensures the accuracy and stability of the movement of the sliding base 312, avoiding deviation or shaking during its movement, so as to ensure that the brick pressing cavity 314 installed on the sliding base 312 can accurately reach the designated positions for blanking and extrusion, improving the precision of the production process. When the translation hydraulic rod 313 is activated, it will extend or shorten. When extending, it pushes the sliding base 312 to move forward along the chute 311 to the blanking position; when shortening, it pulls the sliding base 312 to move backward to the stamping position.

[0053] Furthermore, as Figures 12 to 13 shown, the pushing component 32 includes: A brick pushing hydraulic rod 321, which is arranged at the bottom of the brick pressing cavity 314; A pushing plate 322, which is connected to the ejector rod of the brick pushing hydraulic rod 321.

[0054] In this embodiment, by setting the pushing component 32, the function of pushing the formed low-carbon bricks out of the brick pressing cavity 314 is realized, and further the effect of automatically collecting bricks and improving the continuity of the production process is achieved.

[0055] Specifically, after the brick pushing hydraulic rod 321 is activated, its ejector rod will extend upward, pushing the connected pushing plate 322 to move upward. During the upward movement of the pushing plate 322, it contacts the bottom of the formed low-carbon bricks and applies an upward thrust to them, thus pushing the low-carbon bricks out of the brick pressing cavity 314.

[0056] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A production process of low-carbon bricks for high-strength VOD ladle, characterized in that: The following steps are involved: S1, layered filling, magnesia carbon brick particles, fused magnesia sand, spinel, silicon carbide powder, activated alumina are mixed to form the main material and added into the outer material cavity shell, the main material is mixed with a small amount of carbon powder and added into the transition material cavity shell, the carbon powder content is increased and then mixed with the main material and added into the inner material cavity shell; S2, pressed into bricks, powders with different carbon contents are controlled by the discharge valve assembly and sequentially enter the brick pressing cavity through the receiving assembly to form an annular layered structure. After the filling is completed, the translation assembly moves the brick pressing cavity to the bottom of the extrusion mechanism for pre-punching; S3. Brick collection: After the low-carbon bricks are pressed and formed, they are pushed out and collected through the pushing assembly.

2. The production process of a high-strength VOD ladle low-carbon brick according to claim 1, characterized in that: Including layered feeding mechanism; The layered unloading mechanism includes a vertical moving component, a material dividing component arranged on the vertical moving component, a material unloading valve component arranged on the vertical moving component, and a material receiving component arranged on the vertical moving component; The material distributing assembly stores powders with different carbon contents. When discharging, the material discharging valve assembly opens in sequence to release powders with different carbon contents. The material receiving assembly receives the powders to form a layered structure.

3. The production process of a high-strength VOD ladle low-carbon brick according to claim 2, characterized in that: A vertical moving assembly, the vertical moving assembly comprising: A mounting seat, the mounting seat being arranged on the machine body; a first sliding bar, the first sliding bar being arranged on the mounting seat; A sliding seat, the sliding seat being slidably disposed on the first sliding rod; A screw rod, the screw rod being threadedly matched with the threaded hole on the sliding seat; A drive motor, wherein the output shaft of the drive motor is drivingly connected to the screw rod.

4. The production process of a high-strength VOD ladle low-carbon brick according to claim 3, characterized in that: The material distribution component comprises: An outer material cavity shell, the outer material cavity shell is arranged on the sliding seat; A transition cavity shell, the transition cavity shell being arranged inside the outer cavity shell; An inner material cavity shell, the inner material cavity shell is arranged inside the transition material cavity shell; A first connecting plate, wherein the first connecting plate is used to connect the outer material cavity shell, the transition material cavity shell and the inner material cavity shell.

5. The production process of a high-strength VOD ladle low-carbon brick according to claim 3, characterized in that: The unloading valve assembly comprises: A mounting plate, the mounting plate being arranged on the sliding seat; a second slide bar, wherein a plurality of second slide bars are arranged on the mounting plate; A bidirectional screw rod, wherein a plurality of bidirectional screw rods are arranged on the mounting plate; The motor is provided with multiple groups, and the output shafts are respectively connected to the bidirectional screw rods; A sliding plate, the sliding plate is slidably disposed on the second sliding rod and is symmetrically disposed; An outer semi-annular plate, the outer semi-annular plate being arranged on the sliding plate; a middle semi-annular plate, the middle semi-annular plate being arranged on the sliding plate and being located below the outer semi-annular plate; An inner semicircular plate is disposed on the sliding plate and is located below the middle semicircular plate.

6. The production process of a high-strength VOD ladle low-carbon brick according to claim 3, characterized in that: The material receiving assembly comprises: A connecting rod, wherein the connecting rod is arranged on the sliding seat; A shell, wherein the shell is arranged on the connecting rod; an inflatable cavity, the inflatable cavity is arranged inside the shell and connected to the shell through a second connecting plate; An annular airbag, the annular airbag is arranged at the bottom of the inflation cavity; an air pump, the air pump being mounted on the sliding seat; An air delivery pipe is connected to the air outlet of the air pump and the inner cavity of the inflation cavity.

7. The production process of a high-strength VOD ladle low-carbon brick according to claim 2, characterized in that: Also includes: The extrusion mechanism comprises: A hydraulic cylinder, wherein the hydraulic cylinder is arranged on the machine body; An extended pressure rod is connected to the top rod of the hydraulic cylinder through a connecting piece.

8. The production process of a high-strength VOD ladle low-carbon brick according to claim 2, characterized in that: Also includes: A transposition mechanism, the transposition mechanism comprising: A translation assembly, wherein the translation assembly is arranged on the machine body; An ejection assembly, wherein the ejection assembly is arranged on the machine body; The translation component realizes the switching between feeding and extrusion by changing the position, and after the low-carbon bricks are formed, the bricks are pushed out and collected by the pushing component.

9. The production process of a high-strength VOD ladle low-carbon brick according to claim 8, characterized in that: The translation assembly comprises: A slide groove, the slide groove is opened at the bottom of the body; A sliding base, the sliding base is slidably arranged inside the sliding groove; A translation hydraulic rod, wherein the translation hydraulic rod is arranged on the machine body; A brick pressing cavity is arranged on the sliding base.

10. The production process of a high-strength VOD ladle low-carbon brick according to claim 9, characterized in that: The push-out component comprises: A brick-pushing hydraulic rod, which is arranged at the bottom of the brick-pressing cavity; A push plate is connected to the top rod of the brick pushing hydraulic rod.

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