A multi-fiber reinforced magnesium aluminum carbon refractory material and its preparation process

Abstract

The present invention belongs to the technical field of refractory material processing, specifically, a multi-fiber reinforced magnesium aluminum carbon refractory material and a preparation process thereof; the process comprises the following steps: step I: configuring raw materials, mixing to obtain prefabricated materials; step II: placing the prefabricated materials into a container and leveling them; step III: pressing and forming to obtain a formed blank; step IV: low-temperature firing to obtain a refractory brick; the composition of the refractory material processed by the above process comprises: bauxite, capacitive magnesia powder, magnesium aluminum spinel powder, polyethylene fiber, synthetic resin, alumina powder and graphite in proportion by mass; connecting rods are respectively installed on both sides of the container, the connecting rods are rotatably installed on a movable base, and the movable base is movably connected to a stand through a transfer arm; the forming and brick blank transfer processes of the aluminum-magnesium-carbon brick material are optimized to increase the production efficiency of the aluminum-magnesium-carbon brick material.

Description

Technical Field

[0001] The invention belongs to the technical field of refractory material processing, and specifically relates to a multi-fiber reinforced magnesium-aluminum-carbon refractory material and a preparation process thereof. Background Art

[0002] Refractory materials are generally used under light load or no load conditions. The refractoriness requirement for refractory materials is not less than 1580°C. Refractory materials are used in the fields of metallurgy, chemical industry, petroleum and machinery manufacturing, and are mainly used in furnace and kiln structures in the metallurgical field. Through the research and development and use of refractory materials with excellent performance, the comprehensive utilization level of resources and resource security capabilities can be increased.

[0003] Alumina-magnesia-carbon bricks made of special high-alumina bauxite or corundum sand, magnesia and flaky graphite as the main raw materials are used for Shenggang drum lining due to their strong resistance to erosion, spalling and balanced erosion. They are gradually used in the molten pool of large continuous casting tundishes and refining ladles outside the furnace. Summary of the invention

[0004] In order to achieve the purpose of increasing the production efficiency of aluminum-magnesium-carbon brick materials, the present invention adopts the following technical solutions:

[0005] The object of the present invention is to provide a method for optimizing the forming and brick embryo transfer process of aluminum-magnesium-carbon bricks after configuring the aluminum-magnesium-carbon brick raw materials, so as to increase the production efficiency of the aluminum-magnesium-carbon brick materials.

[0006] In order to achieve the above object, the present invention provides a process for preparing a multi-fiber reinforced magnesium-aluminum-carbon refractory material, comprising the following steps:

[0007] Step I: preparing raw materials and mixing them to obtain prefabricated materials;

[0008] Step II: Place the prefabricated material into the container and level it;

[0009] Step III: pressing and molding to obtain a molded blank;

[0010] Step IV: low temperature firing treatment to obtain refractory bricks.

[0011] The composition of the refractory material processed by the above process includes: alumina, capacitor magnesia powder, magnesia aluminum spinel powder, polyethylene fiber, synthetic resin, alumina powder and graphite in proportion by mass.

[0012] Preferably, the firing temperature of the molding blank is 200-250°C;

[0013] The binder uses water glass solution or phenolic resin;

[0014] Among them, polyethylene fiber and polytetrafluoroethylene fiber are added to the raw materials to make them work together with the binder to increase the mixing performance of the raw materials for aluminum-magnesium-carbon bricks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following drawings are intended only to illustrate and explain the present invention, wherein:

[0016] Figure 1 It is a flow chart of the process for preparing magnesium aluminum carbon refractory bricks of the present invention;

[0017] Figure 2 The material composition diagram of the magnesium aluminum carbon refractory brick of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the movable base, the conveying platform and the semi-circular conveying belt of the present invention;

[0019] Figure 4 It is a schematic structural diagram of the stand, transfer arm and material container of the present invention;

[0020] Figure 5 It is a structural schematic diagram of the movable base, the material container and the connecting rod of the present invention;

[0021] Figure 6 It is a structural schematic diagram of the slide and the transfer platform of the present invention;

[0022] Figure 7 It is a structural schematic diagram of the drawing rod of the present invention;

[0023] Figure 8 It is a schematic diagram of the structure of the pick-and-place slot and the counterweight rod of the present invention;

[0024] Fig. 9 It is a structural schematic diagram of the vibration motor, eccentric wheel and limit arm of the present invention;

[0025] Fig.10 It is a structural schematic diagram of the tooth groove and the jacking frame of the present invention;

[0026] Fig.11 It is a structural schematic diagram of the jacking frame and the rubber protrusion of the present invention;

[0027] Fig.12 It is a structural schematic diagram of the supporting seat and the forming press table of the present invention;

[0028] Fig.13 It is a structural schematic diagram of the material container and the supporting seat of the present invention;

[0029] Fig.14 It is a schematic structural diagram of the connecting seat and the rotating driver of the present invention.

[0030] In the figure: a stand 11; a transfer arm 12; a movable base 13; a first telescopic driver 14; a material container 21; a connecting rod 22; a removal plate 23; a pick-up and placement slot 24; a counterweight rod 25; a lifting seat 31; a connecting seat 32; a rotating driver 33; a forming press 34; a conveying platform 4; a semi-circular conveyor belt 41; a slide 42; a transfer platform 43; a pulling rod 44; a vibration motor 51; an eccentric wheel 52; a limiting arm 53; a slot arm 54; a tooth groove 55; a tightening frame 56; and a rubber protrusion 57. DETAILED DESCRIPTION

[0031] In order to achieve the purpose of increasing the production efficiency of aluminum-magnesium-carbon brick materials, the present invention provides a multi-fiber reinforced magnesium-aluminum-carbon refractory material preparation process, comprising the following steps:

[0032] Step I: preparing the raw materials, mixing them and adjusting the viscosity of the raw materials with a binder to obtain a prefabricated material;

[0033] Step II: placing the prefabricated material into the container 21, vibrating the container 21, and leveling the prefabricated material;

[0034] Step III: Pressing the preform in the container 21 to obtain a molded blank;

[0035] Step IV: transferring the formed blank from the container 21 to the conveying platform;

[0036] Step V: sintering the formed blank to obtain refractory bricks.

[0037] The composition of the refractory material processed by the above process includes: 35-55 parts by mass of alumina, 50-60 parts of capacitor magnesia powder, 10-25 parts of magnesia-alumina spinel powder, 3-6 parts of polyethylene fiber, 5-12 parts of synthetic resin, 3-6 parts of alumina powder and 5-10 parts of graphite.

[0038] Preferably, the firing temperature of the molding blank is 200-250°C;

[0039] The binder uses water glass solution or phenolic resin;

[0040] Among them, polyethylene fiber and polytetrafluoroethylene fiber are added to the raw materials to make them work together with the binder to increase the mixing performance of the raw materials for aluminum-magnesium-carbon bricks.

[0041] The specific embodiments of the present invention are described below.

[0042] Reference Figure 3-4 and Fig.12 As shown, it is explained that in the preparation process of the multi-fiber reinforced magnesium aluminum carbon refractory material provided by the present invention, by increasing the connection of multiple processing links, the production efficiency of the aluminum magnesium carbon brick material is increased:

[0043] The two ends of the outer side of the container 21 for containing the prefabricated materials are respectively welded and fixedly connected with a connecting rod 22 , and the connecting rod 22 is rotatably mounted on the movable base 13 , and the movable base 13 is movably connected to the stand 11 through the transfer arm 12 .

[0044] Among them, two movable bases 13 are provided, and the two movable bases 13 are respectively slidably installed on both sides of the transfer arm 12, and the transfer arm 12 is rotatably installed on the stand 11. A driving motor for driving the transfer arm 12 to rotate is installed on the stand 11, and the output shaft of the driving motor is connected to the rotating shaft of the transfer arm 12 through a coupling; start the driving motor to drive the movable bases 13 on both sides of the transfer arm 12 to transfer the container 21.

[0045] A counterweight rod 25 is provided at the lower side of the container 21 , and the counterweight rod 25 is used to keep the container 21 moving in a stable state during the transfer stage of the container 21 .

[0046] The stand 11 is installed in the processing area of ​​the workshop, and a supporting seat 31 and a conveying platform 4 are also provided in the processing area. The supporting seat 31 is connected to a forming press 34, and the forming press 34 is used to press the material in the container 21; the conveying platform 4 is used to transfer and convey the formed brick embryos, and perform low-temperature firing after preliminary drying.

[0047] During the rotation of the transfer arm 12, the aluminum-magnesium-carbon bricks are leveled, pressed and formed, and the brick embryos are transferred in sequence, thereby increasing the connection between multiple processing links and thus increasing the production efficiency of the aluminum-magnesium-carbon bricks.

[0048] Reference Figure 8 As shown, an embodiment of increasing the stability of forming and removing the forming blank in the preparation process of the multi-fiber reinforced magnesium-aluminum-carbon refractory material provided by the present invention is described:

[0049] A removal plate 23 is vertically slidably mounted at the bottom of the material container 21 , a counterweight rod 25 is welded and fixedly connected to the lower side of the removal plate 23 , and the counterweight rod 25 is slidably connected to the material container 21 .

[0050] By controlling the vertical movement of the removal plate 23 , the pressed bricks in the container 21 are pushed out for subsequent transfer. The removal plate 23 can be controlled by holding the counterweight rod 25 .

[0051] Among them, the main plate of the removal plate 23 can partially cover the upper side of the bottom of the container 21, and the upper end of the main plate of the removal plate 23 and the upper side of the bottom of the container 21 can be in the same plane, thereby maintaining the embedded installation of the removal plate 23.

[0052] The side of the counterweight rod 25 is provided with an exhaust groove, so as to maintain the air pressure balance during the vertical sliding process of the counterweight rod 25, thereby increasing the stability of the molding and removal of the molded blank.

[0053] Reference Figure 3-4 and Fig. 9 As shown, it illustrates an embodiment of performing an oscillation treatment on the container 21 to make the upper side of the internal material flat in the preparation process of the multi-fiber reinforced magnesium-aluminum-carbon refractory material provided by the present invention:

[0054] The movable base 13 is slidably installed on the side of the transfer arm 12, and a first telescopic driver 14 for driving the movable base 13 to slide is installed on the transfer arm 12; the telescopic driver in the present application can be an electric telescopic rod or a hydraulic cylinder. The first telescopic driver 14 is started to drive the movable base 13 to slide back and forth on the side of the transfer arm 12, and the container 21 is oscillated to level the material inside it.

[0055] A vibration motor 51 and a limit arm 53 are mounted on the movable base 13 , and an eccentric wheel 52 is mounted on the output shaft of the vibration motor 51 via a flat key or a wedge key.

[0056] The vibration motor 51 is started to rotate, and the eccentric wheel 52 is continuously shaken to further vibrate the container 21, thereby discharging the cavities in the refractory bricks therein, thereby increasing the preparation efficiency of the refractory material.

[0057] The first telescopic driver 14 and the power supply battery of the vibration motor 51 are installed on the movable base 13 .

[0058] Reference Figure 9-11 As shown, it is explained that in the preparation process of the multi-fiber reinforced magnesium aluminum carbon refractory material provided by the present invention, the structure of the eccentric wheel 52 is improved to increase the oscillation efficiency of the container 21:

[0059] The eccentric wheel 52 is provided with a rotating shaft, and a slot arm 54 is slidably connected to the limit arm 53. The rotating shaft is slidably connected in the sliding groove on the slot arm 54. A tightening frame 56 is slidably installed on the lower side of the slot arm 54. A spring is welded and fixedly connected between the tightening frame 56 and the end of the slot arm 54, and the spring drives the tightening frame 56 to abut against the limit arm 53.

[0060] Among them, a tooth groove 55 is provided on one side of the groove arm 54, and a rubber protrusion 57 is provided on one side of the tooth groove 55 of the clamping frame 56. The rubber protrusion 57 abuts against the depression of the tooth groove 55. When the clamping frame 56 slides on the groove arm 54, the rubber protrusion 57 cooperates with the tooth groove 55 to further enhance the force exerted on the oscillating container 21, so that the prefabricated material in the container 21 is flattened in the container 21 and the cavity in the prefabricated material is reduced.

[0061] Reference Figure 3-6As shown, it illustrates an embodiment of transferring the refractory brick embryos pushed out by the removal plate 23 to the upper side of the conveying platform 4 in the preparation process of the multi-fiber reinforced magnesium-aluminum-carbon refractory material provided by the present invention:

[0062] Two pick-up and placement grooves 24 are provided on the removal plate 23. After the removal plate 23 pushes the molded blank out of the container 21, the positions of the pick-up and placement grooves 24 form a transfer and receiving space at the bottom of the molded blank.

[0063] A conveying frame is provided on the conveying platform 4, and a plurality of rollers are rotatably mounted on the conveying frame. Two circumferential conveyor belts and two semi-circumferential conveyor belts 41 are sleeved and mounted on the outer sides of the rollers.

[0064] like Figure 3 As shown, two semi-circular conveyor belts 41 are respectively sleeved and installed on the outer sides of the rollers on both sides, and the semi-circular conveyor belt 41 is located between the two circumferential conveyor belts. A hollow opening is formed between the two semi-circumferential conveyor belts 41. The circumferential conveyor belt and the semi-circumferential conveyor belt 41 are both made of elastic material, which can make the upper side of the transfer platform 43 keep flush with the upper ends of the circumferential conveyor belt and the semi-circumferential conveyor belt 41 when the transfer platform 43 shrinks in the slide seat 42, thereby increasing the transfer effect of the molded blank.

[0065] A slide 42 is installed on the bracket of the main body of the conveying platform 4, and a transfer platform 43 is slidably installed on the slide 42. A second telescopic driver for driving the transfer platform 43 to slide is installed on the slide 42. Two groove-shaped protrusions are arranged on the side of the transfer platform 43, and the groove-shaped protrusions cooperate with the pick-up and release grooves 24 to increase the stability of the transfer and receiving of the molded blanks.

[0066] After the formed blank is removed, refractory brick raw materials are added into the container 21 above the conveying platform 4 .

[0067] Reference Figure 5-8 As shown, it illustrates an embodiment of the preparation process of the multi-fiber reinforced magnesium-aluminum-carbon refractory material provided by the present invention, in which the counterweight rod 25 is controlled to rotate to drive the removal plate 23 to dock with the transfer platform 43:

[0068] A pulling rod 44 is slidably mounted on one side of the conveying platform 4. A third telescopic driver for driving the pulling rod 44 to slide is mounted on the conveying platform 4. The movable end of the third telescopic driver is fixedly connected to the pulling rod 44 via a fastener.

[0069] A rubber gasket is provided on the inner side of the pulling rod 44, and the rubber gasket abuts against the conical seat at the lower end of the counterweight rod 25 to limit the position of the counterweight rod 25, so that the counterweight rod 25 can slide on the material container 21, drive the removal plate 23 to push out the molded blank, and control the movable base 13 to extend and the transfer arm 12 to rotate, so that the counterweight rod 25 can drive the material container 21 to tilt, so that the molded blank can be transferred to the transfer platform 43.

[0070] Reference Figure 3 , Figure 8 and Figure 12-14 As shown, an embodiment of pressing and forming the brick material in the container 21 in the preparation process of the multi-fiber reinforced magnesium-aluminum-carbon refractory material provided by the present invention is described:

[0071] The supporting seat 31 is rotatably provided with a connecting seat 32 , the connecting seat 32 is slidably provided with a forming press 34 , and the connecting seat 32 is provided with a fourth telescopic driver for driving the forming press 34 to slide.

[0072] A rotation driver 33 for driving the connecting seat 32 to rotate is installed on the supporting seat 31 , and the output shaft of the rotation driver 33 is connected to the rotating shaft of the connecting seat 32 via a coupling.

[0073] The rotary driver 33 is started to make way for the forming press 34 to provide a moving space for the container 21 , and the fourth telescopic driver is started to control the forming press 34 to press the brick material in the container 21 .

[0074] The supporting seat 31 can support the container 21 and the connecting rods 22 on both sides of the container 21. The forming press 34 can vertically extend into the inner side of the container 21 to press and form the prefabricated material in the container 21. The forming press 34 can be made of breathable steel or the prefabricated material can be formed by multiple extrusions.

Claims

1. A refractory material preparation process, characterized in that: The following steps are involved: Step I: preparing the raw materials, mixing them and adjusting the viscosity of the raw materials with a binder to obtain a prefabricated material; Step II: Place the preform into the container and vibrate the container; Step III: pressing the preform in a container to obtain a molded blank; Step IV: transferring the formed blank from the container to the conveying platform; Step V: firing the formed blank to obtain refractory bricks; Connecting rods (22) are respectively installed on both sides of the material container (21), and the connecting rods (22) are rotatably installed on the movable base (13). The movable base (13) is movably connected to the stand (11) through the transfer arm (12), and the stand (11) is installed in the processing area of ​​the workshop. A counterweight rod (25) is arranged on the lower side of the material container (21), and the counterweight rod (25) is used to keep the material container (21) moving in a stable state during the transfer stage of the material container (21); The movable base (13) is provided with two movable bases (13), which are respectively slidably mounted on both sides of the transfer arm (12), and the transfer arm (12) is rotatably connected to the stand (11); a driving motor for driving the transfer arm (12) to rotate is mounted on the stand (11), and the output shaft of the driving motor is connected to the rotation shaft of the transfer arm (12) via a coupling; the movable base (13) is slidably mounted on the side of the transfer arm (12), and a first telescopic driver (14) for driving the movable base (13) to slide is mounted on the transfer arm (12); A removal plate (23) is vertically slidably mounted at the bottom of the material container (21); a counterweight rod (25) is welded and fixedly connected to the lower side of the removal plate (23); and the counterweight rod (25) is slidably connected to the material container (21); The main plate of the removal plate (23) partially covers the upper side of the bottom of the container (21); The upper end of the main plate of the removal plate (23) and the upper side of the bottom of the container (21) can be in the same plane, thereby maintaining the embedded installation of the removal plate (23); The removal plate (23) is provided with two pick-up and placement grooves (24). After the removal plate (23) pushes the molded blank out of the container (21), the positions of the pick-up and placement grooves (24) form a transfer and receiving space at the bottom of the molded blank. The conveying platform (4) is provided with a conveying frame, on which a plurality of rollers are rotatably mounted, and two circumferential conveyor belts and two semi-circumferential conveyor belts (41) are sleeved and mounted on the outer sides of the rollers.

2. The refractory material preparation process according to claim 1, characterized in that: The firing temperature of the molding blank is 200-250°C.

3. The refractory material preparation process according to claim 2 or 1, characterized in that: The binder uses water glass solution or phenolic resin.

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