A special column for reaction sintering silicon carbide kiln and its preparation method

Abstract

The present invention relates to a special column for reaction sintering silicon carbide kiln and its preparation method, the column comprises a column body and a plurality of pads; the column body is in the shape of a circular tube; a plurality of hole groups are provided on the column body for connecting with the kiln car bracket; a plurality of reinforcing ribs are provided on the wall surface of the inner cavity of the column body; the pad is fixed on the lower side of the mounting hole. The preparation method comprises the steps of: measuring raw materials; step 2: mixing raw materials; step 3: pouring the mixed raw materials into a kneading machine, adding deionized water for kneading, and taking out the mixed material after it is in a muddy state; step 4: making the blank of the column body and the pad; step 5: drying the blank of the column and the pad in turn at room temperature, low temperature and high temperature; step 6: installing holes on the blank of the column body; step 7: installing the pad; the column has a reasonable structure, high density, uniform wall thickness, high compressive strength, and can withstand high temperature of 1250°C for long-term use without deformation, cracking, bending or collapse.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic kilns, and in particular to a special column for a reaction sintered silicon carbide kiln and a preparation method thereof. Background Art

[0002] The load-bearing column is used as a kiln car support for various kilns such as sanitary porcelain, daily porcelain, microcrystalline glass, and foamed ceramics. It plays an important role in bearing and supporting. All main beams, auxiliary beams, slabs, and sintered products are sintered under its support. At present, most of the foamed ceramic industry uses single-layer or two-layer supporting columns, and they are all square or giant columns with a relatively simple structure, which cannot meet the needs of actual use. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a special column for a reaction sintered silicon carbide kiln and a preparation method thereof. The column body is changed from the existing square shape to a round shape, has a reasonable structure, high compressive strength, maintains strength and saves materials; it is processed by extrusion molding technology, has uniform wall thickness, and is resistant to high temperatures.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a special column for reaction sintering silicon carbide kiln, comprising

[0005] The column body is in the shape of a circular tube; a plurality of hole groups are provided on the column body for connecting with the kiln car support; a plurality of reinforcing ribs are provided on the wall surface of the inner cavity of the column body;

[0006] and several pads.

[0007] As a preferred technical solution, the plurality of hole groups are evenly distributed in the axial direction of the column body.

[0008] As a preferred technical solution, each hole group includes two mounting holes, the two mounting holes correspond to each other in the positions of the column body, and are connected to each other in the radial direction of the column body.

[0009] As a preferred technical solution, the mounting hole is a square hole, the corners of the mounting hole are rounded to form a first rounded connecting portion, and the pad is fixed on the lower side of the mounting hole.

[0010] As a preferred technical solution, gaps are reserved between the two first rounded corner connecting parts located on both sides of the pad and the pad.

[0011] As a preferred technical solution, the shapes of the two ends of the pad are adapted to the shape of the lower side of the mounting hole; the two side edges of the pad connection surface are rounded to form a second rounded connection portion.

[0012] As a preferred technical solution, the material of the backing plate is the same as that of the column body.

[0013] As a preferred technical solution, the cross-section of the reinforcing rib is arc-shaped, and the reinforcing rib is integrally formed with the column body.

[0014] The above-mentioned method for preparing a special column for reaction sintering silicon carbide kiln comprises the following steps:

[0015] Step 1: Measure the raw materials; the weight proportions of each material are

[0016] Silicon carbide powder with a particle size of 1000 mesh: 12 parts;

[0017] Silicon carbide powder with a particle size of 5000 mesh: 6 parts;

[0018] Silicon carbide powder with a particle size of 650 mesh: 25 parts;

[0019] Silicon carbide powder with a particle size of 300 mesh: 45 parts;

[0020] Toner: 13 parts;

[0021] Sodium carboxymethyl cellulose with a particle size of 80 mesh: 2.5-3 parts;

[0022] Polyvinyl pyrrolidone K30 with a particle size of 120 mesh: 3.5-4 parts;

[0023] Step 2: Mixing raw materials;

[0024] Mix the measured raw materials thoroughly;

[0025] Step 3: Pour the mixed raw materials into the kneading machine, turn on the kneading machine, add 12-13 parts of deionized water and knead, and take out the mixed material after it becomes muddy;

[0026] Step 4: Making column blanks and pad blanks;

[0027] The mud-like material is used to produce a column blank through an extrusion molding process, and the column blank includes a column body and two reinforcing ribs;

[0028] The mud material is used to produce a pad blank through a slip injection molding process;

[0029] Step 5: The column blank and the pad blank are sequentially dried at room temperature, low temperature and high temperature;

[0030] Drying at room temperature: Allow the column blank and the pad blank to dry naturally for 2 to 3 hours;

[0031] Low temperature drying: put the column blank and the pad blank into the low temperature drying chamber, and raise the temperature of the low temperature drying chamber from room temperature to 40 degrees, and the temperature rise time is 2 hours; then keep the temperature constant for 12 hours;

[0032] High temperature drying: put the column blank and the pad blank into the high temperature drying chamber, and raise the temperature in the high temperature drying chamber from 40 degrees to 70 degrees within 4 hours; then keep the temperature constant for 48 hours;

[0033] Step 6: Open the mounting holes on the column blank. On the engraving machine, after the column blank is clamped and positioned once, the engraving head completes the processing of the two mounting holes in the same hole group.

[0034] Step 7: Install the backing plate;

[0035] Apply the mixture prepared in step 3 to the connecting surface of the backing plate and the mounting hole, and then bond the backing plate to the lower side of the mounting hole, leaving gaps between the backing plate and the two corners of the mounting hole.

[0036] The prior art generally adopts a column body with a square or rectangular cross section. During the sintering operation, when the column body runs to the position of the kiln flame nozzle, it will block the flame, and the flame cannot be sprayed into the kiln car, and the product cannot be sintered; therefore, the effective time of the flame spraying into the kiln car is reduced, and the heat entering the kiln car is correspondingly reduced, affecting the sintering quality; in order to ensure the sintering quality, it is necessary to extend the sintering time accordingly, and the energy consumption of the kiln is high. This application innovatively proposes a column body with a circular cross section. When the column body passes the position of the kiln flame nozzle, the flame will be sprayed along the outer arc surface of the column body, bypassing the column body and spraying into the kiln car, thereby improving the efficiency of heat application, reducing energy consumption, and improving sintering quality. The column is specially designed for reaction sintering silicon carbide kiln, with a reasonable structure, high density, uniform wall thickness, high compressive strength, high temperature resistance of 1250℃, and long-term use without deformation, cracking, bending, or collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative labor.

[0038] Figure 1 It is a schematic diagram of the structure of a reaction sintering column;

[0039] Figure 2 yes Figure 1 A partial magnified view of the middle B area;

[0040] Figure 3 yes Figure 1 Sectional view of section AA;

[0041] Figure 4 yes Figure 3A partial magnified view of the middle C area;

[0042] Figure 5 It is a structural schematic diagram of the column main body extrusion die;

[0043] Figure 6 yes Figure 5 Cross-sectional view of the middle DD section;

[0044] Figure 7 This is a schematic diagram of the clamping of the column body on the engraving machine;

[0045] Figure 8 It is a schematic diagram of the processing process of the mounting holes on the column body. DETAILED DESCRIPTION

[0046] A special column for reaction sintering silicon carbide kiln, such as Figure 1 and Figure 3 As shown, it includes a column body 1, which is tubular and has an inner cavity extending along its axial direction; the cross section of the column body 1 is circular.

[0047] The column body 1 is provided with a plurality of hole groups 3, and the plurality of hole groups 3 are evenly distributed in the axial direction of the column body 1. In actual use, the number of hole groups 3 can be set as required; Figure 2 As shown, three hole groups 3 are provided on the column body 1 .

[0048] Each hole group 3 includes two mounting holes 31, and the two mounting holes 31 correspond to each other at the positions of the column body 1 and are connected to each other in the radial direction of the column body 1. When in use, one end of the kiln car bracket passes through the two mounting holes 31 of the same hole group 3 at the same time, thereby increasing the connection strength between the column body 1 and the kiln car bracket and ensuring stability in use.

[0049] like Figure 1 As shown, the mounting hole 31 is a square hole, which is suitable for square beams. When beams of other shapes are used in actual use, the mounting hole 31 can be adjusted as needed. For example, when the connecting part of the beam is cylindrical, the mounting hole 31 can be a circular hole; when the connecting part of the beam is trapezoidal, the mounting hole 31 can be a trapezoidal hole, etc.

[0050] In order to make the column body 1 meet the pressure resistance requirements, prevent the installation hole 31 from cracking under high temperature and load, and ensure the strength of the column body 1, Figure 2 As shown, the corners of the mounting hole 31 are rounded to form a first rounded connecting portion 11 to remove stress and prevent cracking from the corners.

[0051] In order to ensure that the strength of the column body 1 is not reduced, a plurality of reinforcing ribs 4 are provided on the wall surface of the inner cavity. Figure 3 and Figure 4As shown, two reinforcing ribs 4 are arranged on the wall of the inner cavity, and the two reinforcing ribs 4 and the two mounting holes 31 are arranged at intervals in the circumferential direction of the column body 1, that is, the two reinforcing ribs 4 are located on the left and right sides of the mounting hole 31.

[0052] The cross section of the reinforcing rib 4 is preferably an arc shape, and the thickness consistency of the reinforcing rib 4 is good; optimally, the reinforcing rib 4 and the column body 1 are integrally formed.

[0053] It also includes a plurality of pads 2, the material of the pads 2 being the same as that of the column body 1. The pads 2 are fixed on the lower side of the mounting hole 31, increasing the pressure-resistant contact surface between the kiln car support and the column body 1; Figure 2 and Figure 3 As shown, the pad 2 is a long strip plate, and the thickness of the pad 2 is preferably 8 mm. The two ends of the pad 2 are arc-shaped, which are adapted to the shape of the lower side surface of the mounting hole 31, ensuring that the contact area between the pad 2 and the lower side surface of the mounting hole 31 is maximized. The side edges of the connecting surface of the pad 2 are rounded to form a second rounded corner connection portion 21. Each pad 2 is fixed in two mounting holes 31 of the same hole group 3 at the same time. In order to prevent the pad 2 from being subjected to excessive force when the column body 1 is bearing weight, and the two corners at the bottom from cracking due to excessive stress, a gap is reserved between the pad 2 and the first rounded corner connection portion 11, and the minimum width of the gap is 1.5 mm. In this way, the first rounded corner connection portion 11 and the second rounded corner connection portion 21 are not in contact with each other, ensuring that the pad 2 is pressed downward after being subjected to force, while the first rounded corner connections 11 on both sides are not subjected to force.

[0054] The preparation method of the above-mentioned column comprises the following steps:

[0055] Step 1: Measure the raw materials; the weight proportions of each material are

[0056] Silicon carbide powder with a particle size of 1000 mesh: 12 parts;

[0057] Silicon carbide powder with a particle size of 5000 mesh: 6 parts;

[0058] Silicon carbide powder with a particle size of 650 mesh: 25 parts;

[0059] Silicon carbide powder with a particle size of 300 mesh: 45 parts;

[0060] Toner: 13 parts;

[0061] Sodium carboxymethyl cellulose with a particle size of 80 mesh: 2.5-3 parts;

[0062] Polyvinyl pyrrolidone K30 with a particle size of 120 mesh: 3.5-4 parts;

[0063] Step 2: Mixing raw materials;

[0064] Mix the measured raw materials thoroughly;

[0065] Step 3: Pour the mixed raw materials into the kneading machine, turn on the kneading machine, add 12-13 parts of deionized water and knead, and take out the mixed material after it becomes muddy;

[0066] Step 4: Making column blanks and pad blanks;

[0067] The mud-like material is produced into a column blank through an extrusion molding process. The column blank includes a column body 1 and two reinforcing ribs 4.

[0068] Specifically, the kneaded mud material is added into a vacuum screw extruder and extruded through a die. Figure 5 and Figure 6 As shown, the mold is composed of an outer mold body 5 and a core mold 6, and an extrusion channel is formed between the core mold 6 and the outer mold body 5. The column blank formed by extrusion includes a column body 1 and two reinforcing ribs 4; due to the use of the extrusion molding process, the wall thickness of the column body 1 and the reinforcing ribs 4 after molding is uniform, the strength is high, and the performance is stable and reliable.

[0069] The mud material is made into a pad blank through a slip injection molding process.

[0070] Specifically, the blank of the backing plate 2 is produced by slip injection molding using a plaster mold.

[0071] Step 5: The column blank and the pad blank are sequentially dried at room temperature, low temperature and high temperature;

[0072] Drying at room temperature: Allow the column blank and the pad blank to dry naturally for 2 to 3 hours;

[0073] Low temperature drying: put the column blank and the pad blank into the low temperature drying chamber, and raise the temperature of the low temperature drying chamber from room temperature to 40 degrees, and the temperature rise time is 2 hours; then keep the temperature constant for 12 hours, that is, the temperature of the low temperature drying chamber is maintained at 40 degrees, and the time is 12 hours;

[0074] High temperature drying: put the column blank and the pad blank into the high temperature drying chamber, and raise the temperature of the high temperature drying chamber from 40 degrees to 70 degrees, and the temperature rise time is 4 hours; then keep the temperature constant for 48 hours, that is, the temperature of the high temperature drying chamber is maintained at 70 degrees, and the time is 48 hours;

[0075] Step 6: Open mounting holes on the column blank;

[0076] When opening the mounting holes 31, it is required that the three mounting holes 31 on the same side of the column body 1 are located in a straight line to ensure symmetry, and the heights of the two mounting holes 31 in the same hole group 3 are consistent. Figure 7 and Figure 8As shown, the operation of opening the mounting hole 31 is performed on the engraving machine 72. After the column blank is clamped and positioned on the engraving machine 72, the engraving machine head 75 is used to engrave the mounting hole 31 on the column body 1. The clamping of the column blank can be as follows Figure 7 As shown, the end of the column blank is positioned by an end positioning clamp 71 , the column body 1 is supported by a V-shaped fixing block 73 , and the column body 1 is clamped by a plurality of positioning clamps 74 .

[0077] After the column blank is clamped and positioned once on the engraving machine 72, the processing of the two mounting holes 31 in the same hole group 3 is completed. Figure 8 As shown, the mounting hole 31 on the upper side is processed first, and after completion, the engraving machine head 75 passes through the mounting hole 31 to process another mounting hole 31 on the lower side, without turning over the column blank, ensuring that the two mounting holes 31 in the same hole group 3 are on the same radial line, avoiding the kiln car bracket from being unable to be installed due to the mutual misalignment of the two mounting holes 31. After completing the processing of one hole group 3, the column body 1 is clamped and positioned again, and the processing of other hole groups 3 is completed.

[0078] Step 7: Install the pad 2;

[0079] Apply the slurry prepared in step 3 to the connecting surface of the pad 2 and the mounting hole 31; then bond the pad 2 to the lower side of the mounting hole 31, leaving a gap between the pad 2 and the two vertical sides of the mounting hole 31, and the minimum width of the gap is 1.5mm.

[0080] The slurry prepared in step 3 is applied to the downward side surfaces at both ends of the pad 2, and the upward side surfaces of the mounting hole 31 are also evenly coated with the slurry. Example

[0081] The preparation method of the column comprises the following steps

[0082] Step 1: Measure the raw materials; the weight proportions of each material are

[0083] Silicon carbide powder with a particle size of 1000 mesh: 12 parts;

[0084] Silicon carbide powder with a particle size of 5000 mesh: 6 parts;

[0085] Silicon carbide powder with a particle size of 650 mesh: 25 parts;

[0086] Silicon carbide powder with a particle size of 300 mesh: 45 parts;

[0087] Toner: 13 parts;

[0088] 2.5 parts of sodium carboxymethyl cellulose with a particle size of 80 mesh;

[0089] Polyvinyl pyrrolidone K30 with a particle size of 120 mesh: 3.5 parts.

[0090] Step 2: Mixing raw materials;

[0091] Add the measured raw materials into a V-type mixer and stir for 60 minutes, then stop the machine and take them out.

[0092] Step 3: Pour the mixed raw materials into the kneading machine, turn on the kneading machine, add 12 parts of deionized water and knead for 50 minutes. Take out the mixed material when it becomes muddy;

[0093] Step 4: Making column blanks and pad blanks;

[0094] The kneaded mud material is added into a vacuum screw extruder and extruded through a die to form a column blank including a column body 1 and two reinforcing ribs 4;

[0095] The blank of the backing plate 2 is produced by slip injection molding using a plaster mold.

[0096] Step 5: The column blank and the pad blank are sequentially dried at room temperature, low temperature and high temperature;

[0097] Drying at room temperature: Allow the column blank and the pad blank to dry naturally for 2 to 3 hours;

[0098] Low temperature drying: put the column blank and the pad blank into the low temperature drying chamber, the temperature of the low temperature drying chamber is raised from room temperature to 40 degrees, the temperature rise time is 2 hours, and then the temperature is kept constant for 12 hours;

[0099] High temperature drying: Place the column blank and the pad blank into a high temperature drying chamber. The temperature in the high temperature drying chamber is raised from 40 degrees to 70 degrees. The temperature rise time is 4 hours, and then the temperature is kept constant for 48 hours.

[0100] Step 6: Drilling mounting holes in the column blank; drilling multiple mounting holes 31 at one time.

[0101] Step 7: Install the pad 2;

[0102] Apply the slurry formed in step 3 to the connecting surface of the pad 2 and the mounting hole 31; then bond the pad 2 to the lower side of the mounting hole 31, leaving a gap of 1.5 mm between the pad 2 and the two vertical sides of the mounting hole 31.

[0103] Embodiment 2:

[0104] The preparation method of the column comprises the following steps

[0105] Step 1: Measure the raw materials; the weight proportions of each material are

[0106] Silicon carbide powder with a particle size of 1000 mesh: 12 parts;

[0107] Silicon carbide powder with a particle size of 5000 mesh: 6 parts;

[0108] Silicon carbide powder with a particle size of 650 mesh: 25 parts;

[0109] Silicon carbide powder with a particle size of 300 mesh: 45 parts;

[0110] Toner: 13 parts;

[0111] Sodium carboxymethyl cellulose with a particle size of 80 mesh: 3 parts;

[0112] Polyvinyl pyrrolidone K30 with a particle size of 120 mesh: 4 parts.

[0113] Step 2: Mixing raw materials;

[0114] Add the measured raw materials into a V-type mixer and stir for 60 minutes, then stop the machine and take them out.

[0115] Step 3: Pour the mixed raw materials into the kneading machine, turn on the kneading machine, add 12 parts of deionized water and knead for 60 minutes. Take out the mixed material when it becomes muddy;

[0116] Step 4: Making column blanks and pad blanks;

[0117] The kneaded mud material is added into a vacuum screw extruder and extruded through a die to form a column blank including a column body 1 and two reinforcing ribs 4;

[0118] The blank of the backing plate 2 is produced by slip injection molding using a plaster mold.

[0119] Step 5: The column blank and the pad blank are sequentially dried at room temperature, low temperature and high temperature;

[0120] Drying at room temperature: Allow the column blank and the pad blank to dry naturally for 2 to 3 hours;

[0121] Low temperature drying: put the column blank and the pad blank into the low temperature drying chamber, the temperature of the low temperature drying chamber is raised from room temperature to 40 degrees, the temperature rise time is 2 hours, and then the temperature is kept constant for 12 hours;

[0122] High temperature drying: Place the column blank and the pad blank into a high temperature drying chamber. The temperature in the high temperature drying chamber is raised from 40 degrees to 70 degrees. The temperature rise time is 4 hours, and then the temperature is kept constant for 48 hours.

[0123] Step 6: Drill installation holes in the column blank;

[0124] The drilling of multiple mounting holes 31 is completed at one time.

[0125] Step 7: Install the pad 2;

[0126] The slurry prepared in step three is applied to the connecting surface of the pad 2, and the connecting surface of the mounting hole 31 is also evenly coated with the slurry; then the pad 2 is bonded to the lower side of the mounting hole 31, leaving a gap of 1.5 mm between the pad 2 and the two vertical sides of the mounting hole 31.

[0127] The temperature is low in winter. The above preparation scheme is adopted to increase the proportion of sodium carboxymethyl cellulose and polyvinyl pyrrolidone K30 and increase the mixing time, which is beneficial to ensure the strength of the product.

[0128] Embodiment three:

[0129] A method for preparing a column, comprising:

[0130] Step 1: Measure the raw materials; the weight ratio of each material is

[0131] Silicon carbide powder with a particle size of 1000 mesh: 12 parts;

[0132] Silicon carbide powder with a particle size of 5000 mesh: 6 parts;

[0133] Silicon carbide powder with a particle size of 650 mesh: 25 parts;

[0134] Silicon carbide powder with a particle size of 300 mesh: 45 parts;

[0135] Toner: 13 parts;

[0136] 2.5 parts of sodium carboxymethyl cellulose with a particle size of 80 mesh;

[0137] Polyvinyl pyrrolidone K30 with a particle size of 120 mesh: 3.5 parts.

[0138] Step 2: Mixing raw materials;

[0139] Add the measured raw materials into a V-type mixer and stir for 60 minutes, then stop the machine and take them out.

[0140] Step 3: Pour the mixed raw materials into the kneading machine, turn on the kneading machine, add 13 parts of deionized water and knead for 50 minutes. Take out the mixed material when it becomes muddy;

[0141] Step 4: Making column blanks and pad blanks;

[0142] The kneaded mud material is added into a vacuum screw extruder and extruded through a die to form a column blank including a column body 1 and two reinforcing ribs 4;

[0143] The blank of the backing plate 2 is produced by slip injection molding using a plaster mold.

[0144] Step 5: The column blank and the pad blank are sequentially dried at room temperature, low temperature and high temperature;

[0145] Drying at room temperature: Allow the column blank and the pad blank to dry naturally for 2 to 3 hours;

[0146] Low temperature drying: put the column blank and the pad blank into the low temperature drying chamber, the temperature of the low temperature drying chamber is raised from room temperature to 40 degrees, the temperature rise time is 2 hours, and then the temperature is kept constant for 12 hours;

[0147] High temperature drying: Place the column blank and the pad blank into a high temperature drying chamber. The temperature in the high temperature drying chamber is raised from 40 degrees to 70 degrees. The temperature rise time is 4 hours, and then the temperature is kept constant for 48 hours.

[0148] Step 6: Drilling mounting holes in the column blank; drilling multiple mounting holes 31 at one time.

[0149] Step 7: Install the pad 2;

[0150] Apply the slurry prepared in step 3 to the connecting surface of the pad 2 and the mounting hole 31; then bond the pad 2 to the lower side of the mounting hole 31, leaving a gap of 1.5 mm between the pad 2 and the two vertical sides of the mounting hole 31.

[0151] In summer, the temperature is high and water evaporates quickly. Appropriately increase the weight proportion of deionized water to ensure product quality.

[0152] After testing, the density of the product obtained by the present invention reaches 3.06g / cm³, which improves the compressive strength. The column is changed from square to round, ensuring that the strength is not reduced and saving materials. The present invention adopts an extrusion molding process to achieve uniform wall thickness, and the reinforcing ribs 4 greatly improve the compressive strength of the column. In order to ensure that the center planes of the 6 mounting holes 31 of the column body 1 are in the same plane and meet the requirements of hole symmetry and hole height consistency, the 6 mounting holes 31 are processed at one time. In order to prevent the column from being subjected to excessive force when bearing weight, causing the bottom two corners of the mounting hole 31 to crack due to excessive stress, a 1.5mm wide gap is left on both sides of the pad 2 and the two first fillet connection parts 11 of the mounting hole 31, ensuring that the pad 2 is pressed downward after being subjected to force and the two sides of the mounting hole 31 are not subjected to force.

[0153] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A special column for reaction sintering silicon carbide kiln, characterized by: include The column body (1) is in the shape of a circular tube; a plurality of hole groups (3) are provided on the column body (1) for connection with a kiln car support; a plurality of reinforcing ribs (4) are provided on the wall surface of the inner cavity of the column body (1); and a plurality of pads (2); The plurality of hole groups (3) are evenly distributed in the axial direction of the column body (1); Each hole group (3) comprises two mounting holes (31), the two mounting holes (31) are located at positions corresponding to each other on the column body (1), and are connected to each other in the radial direction of the column body (1); The mounting hole (31) is a square hole, and the corners of the mounting hole (31) are rounded to form a first rounded connecting portion (11); The backing plate (2) is fixed on the lower side of the mounting hole (31); A gap is reserved between the two first rounded corner connection parts (11) located on both sides of the backing plate (2) and the backing plate (2); The shapes of the two ends of the backing plate (2) are adapted to the shape of the lower side surface of the mounting hole (31); the two side edges of the connection surface of the backing plate (2) are rounded to form a second rounded connection portion (21); The material of the backing plate (2) is the same as that of the column body (1); The cross section of the reinforcing rib (4) is arc-shaped, and the reinforcing rib (4) and the column body (1) are integrally formed. The method for preparing the above column dedicated to the reaction sintering silicon carbide kiln comprises the following steps: Step 1: Measure the raw materials; the weight proportions of each material are Silicon carbide powder with a particle size of 1000 mesh: 12 parts; Silicon carbide powder with a particle size of 5000 mesh: 6 parts; Silicon carbide powder with a particle size of 650 mesh: 25 parts; Silicon carbide powder with a particle size of 300 mesh: 45 parts; Toner: 13 parts; Sodium carboxymethyl cellulose with a particle size of 80 mesh: 2.5-3 parts; Polyvinyl pyrrolidone K30 with a particle size of 120 mesh: 3.5-4 parts; Step 2: Mixing raw materials; Mix the measured raw materials thoroughly; Step 3: Pour the mixed raw materials into the kneading machine, turn on the kneading machine, add 12-13 parts of deionized water and knead, and take out the mixed material after it becomes muddy; Step 4: Making column blanks and pad blanks; The mud-like material is produced into a column blank through an extrusion molding process, wherein the column blank comprises a column body (1) and two reinforcing ribs (4); The mud material is used to produce a pad blank through a slip injection molding process; Step 5: The column blank and the pad blank are sequentially dried at room temperature, low temperature and high temperature; Drying at room temperature: Allow the column blank and the pad blank to dry naturally for 2 to 3 hours; Low temperature drying: put the column blank and the pad blank into the low temperature drying chamber, and raise the temperature of the low temperature drying chamber from room temperature to 40 degrees, and the temperature rise time is 2 hours; then keep the temperature constant for 12 hours; High temperature drying: put the column blank and the pad blank into the high temperature drying chamber, and raise the temperature in the high temperature drying chamber from 40 degrees to 70 degrees within 4 hours; then keep the temperature constant for 48 hours; Step 6: Opening mounting holes (31) on the column blank; on the engraving machine (72), after the column blank is clamped and positioned once, the engraving machine head (75) completes the processing of two mounting holes (31) in the same hole group (3); Step 7: Install the backing plate (2); The mixture prepared in step 3 is applied to the connecting surface of the backing plate (2) and the mounting hole (31), and then the backing plate (2) is bonded to the lower side of the mounting hole (31), with gaps being left between the backing plate (2) and the two corners of the mounting hole (31).

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