Sagger device for improving sintering uniformity of lead titanate filter cake

Abstract

The sagger device for improving the sintering uniformity of the lead titanate filter cake comprises a sagger body with an opening in the upper end and a sagger cover used for blocking the opening of the sagger body, and further comprises a first micropore structure, a second micropore structure and a third micropore structure, the second micropore structure is arranged on the box cover; the bearing step is arranged in the box body, and the lead titanate filter cake is placed on the bearing step; the box body is provided with the heat conduction column, and the lead titanate filter cake is provided with a through hole matched with the heat conduction column; and the multiple exhaust vertical ribs are arranged on the peripheral face of the heat conduction column at intervals, and an exhaust channel is formed between every two adjacent exhaust vertical ribs and the heat conduction column. And external high-temperature airflow enters from the first microporous structure at the bottom of the sagger and is in uniform contact with the lead titanate filter cake, so that the lead titanate filter cake is uniformly heated. And the high-temperature airflow is discharged through the second microporous structure. The heat conduction column can heat the lead titanate filter cake through heat radiation, and the heating uniformity of the lead titanate filter cake is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of saggar, and particularly relates to a saggar device for improving sintering uniformity of lead titanate filter cake. BACKGROUND

[0002] The lead titanate filter cake is a kind of moist and cake-shaped intermediate product obtained after washing in the process of synthesizing lead titanate powder. The purpose of sintering is to convert the soft, fragile and useless lead titanate filter cake into dense, hard and specific electrically functional lead titanate ceramics. In the sintering process, the lead titanate filter cake needs to be placed in a saggar.

[0003] In the prior art, the saggar is heated and heated by thermal radiation to heat the lead titanate filter cake, which causes uneven heating of the lead titanate filter cake, thereby causing defects such as cracking, deformation or inconsistent performance.

[0004] Therefore, it is urgent to provide a saggar device for improving sintering uniformity of lead titanate filter cake to uniformly heat the lead titanate filter cake. CONTENT OF THE INVENTION

[0005] The present application provides a saggar device for improving sintering uniformity of lead titanate filter cake, which aims to solve the problem that the saggar is heated and heated by thermal radiation to heat the lead titanate filter cake in the prior art, which causes uneven heating of the lead titanate filter cake, thereby causing defects such as cracking, deformation or inconsistent performance.

[0006] To achieve the above-mentioned purpose, the present application provides a saggar device for improving sintering uniformity of lead titanate filter cake, which comprises a saggar body with an open upper end and a saggar cover for plugging the opening of the saggar body, and further comprises: a first microporous structure, the bottom of the saggar body is provided with the first microporous structure; a second microporous structure, the saggar cover is provided with the second microporous structure; a supporting step, the inside of the saggar body is provided with the supporting step, and the lead titanate filter cake is placed on the supporting step; a heat-conducting column, the saggar body is provided with the heat-conducting column, and the lead titanate filter cake is provided with a through hole matched with the heat-conducting column; a plurality of exhaust vertical ribs, a plurality of exhaust vertical ribs are arranged at intervals on the outer circumferential surface of the heat-conducting column, and an exhaust passage is formed between the adjacent two exhaust vertical ribs and the heat-conducting column.

[0007] In some embodiments, further comprising: a plurality of supporting members, the plurality of supporting members are arranged at intervals on the bottom of the saggar body, and the supporting members partially contact the lead titanate filter cake.

[0008] In some embodiments, further comprising: a positioning hole, the bottom of the saggar body is provided with the positioning hole; and a positioning protrusion, the top end of the saggar cover is provided with the positioning protrusion matched with the positioning hole.

[0009] In some embodiments, further comprising: a first clamping part, the saggar cover is provided with the first clamping part matched with the opening of the saggar body.

[0010] The technical scheme of the present application provides a sagger device for improving sintering uniformity of lead titanate filter cake, which comprises an open upper end sagger and a sagger cover for plugging the opening of the sagger, and further comprises: a first microporous structure, the bottom of the sagger is provided with the first microporous structure; a second microporous structure, the sagger cover is provided with the second microporous structure; a supporting step, the inside of the sagger is provided with the supporting step, and the lead titanate filter cake is placed on the supporting step; a heat conduction column, the sagger is provided with the heat conduction column, and the lead titanate filter cake is provided with a through hole matched with the heat conduction column; a plurality of exhaust vertical ribs, a plurality of exhaust vertical ribs are arranged at intervals on the outer circumferential surface of the heat conduction column, and an exhaust channel is formed between the adjacent two exhaust vertical ribs and the heat conduction column. In the process of sintering the lead titanate filter cake, the lead titanate filter cake is placed on the supporting step in the inside of the sagger. The high-temperature gas flow from outside enters from the first microporous structure at the bottom of the sagger, uniformly contacts the lead titanate filter cake, so as to achieve the purpose of uniformly heating the lead titanate filter cake. The high-temperature gas flow rising from below is discharged through the second microporous structure, actively guides the high-temperature gas flow to flow from bottom to top, uniformly heats the lead titanate filter cake, and avoids forming a dead zone at the top of the sagger, so as to ensure that the lead titanate filter cake is uniformly heated, and the quality of the finally formed lead titanate ceramic is improved. And the heat conduction column can heat the lead titanate filter cake through heat radiation, further improving the uniformity of the heating of the lead titanate filter cake. The exhaust channel formed by the exhaust vertical ribs is used for discharging the gas formed by the water and the gel vaporization, avoiding the accumulation of gas in the lead titanate filter cake to form high pressure, causing the lead titanate filter cake to bubble, swell or even crack. The quality of the sintered lead titanate ceramic is improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings, wherein:

[0012] Figure 1 It is a perspective view of the sagger device for improving sintering uniformity of lead titanate filter cake in an embodiment of the present application.

[0013] Figure 2 It is a bottom view of the sagger device for improving sintering uniformity of lead titanate filter cake in an embodiment of the present application.

[0014] Figure 3 It is a sectional view of the A-A part in the sagger device for improving sintering uniformity of lead titanate filter cake in an embodiment of the present application. Figure 2

[0015] Figure 4 It is a perspective view of the sagger in an embodiment of the present application.

[0016] ​In the figure: the box body 1, the positioning convex 2, the second micro-hole structure 3, the box cover 4, the first micro-hole structure 5, the positioning hole 6, the first clamping part 7, the second clamping part 8, the supporting step 9, the exhaust vertical rib 10, the heat conduction column 11, the supporting piece 12, the clamping groove 13. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0018] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the present application proposes a box device for improving the sintering uniformity of lead titanate filter cake, which comprises an upper-end-opened box body 1 and a box cover 4 for plugging the opening of the box body 1, and further comprises: a first micro-hole structure 5, which is arranged at the bottom of the box body 1; a second micro-hole structure 3, which is arranged on the box cover 4; a supporting step 9, which is arranged inside the box body 1 and on which the lead titanate filter cake is placed; a heat conduction column 11, which is arranged on the box body 1 and through which the lead titanate filter cake is provided with a through hole matched with the heat conduction column 11; and a plurality of exhaust vertical ribs 10, which are arranged at intervals on the outer circumferential surface of the heat conduction column 11, and an exhaust passage is formed between the heat conduction column 11 and the adjacent two exhaust vertical ribs 10.

[0019] Among them, the box body 1 is the main structure of the box device, and other structures on the box device are directly or indirectly connected to the box body 1. In the process of sintering the lead titanate filter cake, the lead titanate filter cake is first loaded into the box body 1 through the opening, and then the box body 1 is pushed into the tunnel kiln to sinter the lead titanate filter cake in the tunnel kiln, forming a dense, hard, and specific electrically functional lead titanate ceramic. The box cover 4 is used to plug the opening of the box body 1.

[0020] Among them, the supporting step 9 is used to support the lead titanate filter cake. Ensure that there is a small gap between the lead titanate filter cake and the bottom of the box body 1. The external high-temperature gas flow enters from the first micro-hole structure 5 at the bottom of the box and is dispersed into a plurality of fine gas flows, uniformly contacts the lead titanate filter cake, and uniformly heats the lead titanate filter cake. The high-temperature gas flow rising from below is discharged through the second micro-hole structure 3, forming a smooth chimney effect, actively guiding the high-temperature gas flow to flow from bottom to top, uniformly heating the lead titanate filter cake, and avoiding the formation of a dead zone at the top of the box, ensuring that the sintering effect of the upper half of the lead titanate filter cake is consistent with the lower half.

[0021] In the process of sintering, the heat-conducting column 11 can heat the lead titanate filter cake by heat radiation, further improving the uniformity of the heating of the lead titanate filter cake. The lead titanate filter cake contains a large amount of water and glue, which will be gasified in the process of sintering. The exhaust channel formed by the exhaust vertical rib 10 is used to exhaust the gas formed by the gasification of water and glue, avoiding the accumulation of gas in the lead titanate filter cake to form high pressure, which causes the lead titanate filter cake to bubble, swell, and even crack. The quality of the sintered lead titanate ceramic is improved.

[0022] Specifically, in the process of sintering the lead titanate filter cake, the lead titanate filter cake is placed on the support step 9 inside the box body 1. The external high-temperature gas flow enters from the first micro-porous structure 5 at the bottom of the box, uniformly contacts the lead titanate filter cake, and uniformly heats the lead titanate filter cake. The high-temperature gas flow rising from below is exhausted through the second micro-porous structure 3, actively guiding the high-temperature gas flow to flow from bottom to top, uniformly heating the lead titanate filter cake, and avoiding the formation of a dead zone at the top of the box, ensuring that the lead titanate filter cake is uniformly heated and improving the quality of the finally formed lead titanate ceramic. The heat-conducting column 11 can heat the lead titanate filter cake by heat radiation, further improving the uniformity of the heating of the lead titanate filter cake. The exhaust channel formed by the exhaust vertical rib 10 is used to exhaust the gas formed by the gasification of water and glue, avoiding the accumulation of gas in the lead titanate filter cake to form high pressure, which causes the lead titanate filter cake to bubble, swell, and even crack. The quality of the sintered lead titanate ceramic is improved.

[0023] The box body 1 and the box cover 4 are made of any one of high alumina bauxite and silicon carbide, so that the box body 1 and the box cover 4 have excellent mechanical properties, heat resistance and chemical stability, and can withstand harsh use environments.

[0024] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , in some embodiments, further comprising: a plurality of supporting members 12, the plurality of supporting members 12 being arranged at the bottom of the box body 1, and the supporting members 12 partially contacting the lead titanate filter cake. The plurality of supporting members 12 can effectively prevent the lead titanate filter cake from falling, and also leave a large enough gap for the smooth passage of high-temperature gas flow.

[0025] It can be understood that the supporting member 12 is a cylinder, and in the height direction of the box body 1, the top surface of the supporting member 12 is flush with the top surface of the support step 9. When the bottom of the lead titanate filter cake contacts the support step 9, the top surface of the supporting member 12 must contact the bottom of the lead titanate filter cake, effectively increasing the supporting area. The stability of the lead titanate filter cake in the sintering process is enhanced.

[0026] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4As shown in the drawings, in some embodiments, further comprising: a positioning hole 6, the bottom of the box body 1 is provided with the positioning hole 6; and a positioning protrusion 2, the top end of the box cover 4 is provided with the positioning protrusion 2 matched with the positioning hole 6. In the process of sintering the lead titanate filter cake, a plurality of box devices can be stacked vertically to improve the sintering efficiency. The two vertically adjacent box devices are positioned by the cooperation of the positioning hole 6 and the positioning protrusion 2, so as to avoid misalignment of the two vertically adjacent box devices.

[0027] In the embodiment, the positioning protrusion 2 is in the shape of a truncated cone, and the positioning hole 6 is in the shape of a tapered hole matched with the positioning protrusion 2. Through the above structure design, the positioning protrusion 2 can be effectively guided, and the difficulty of inserting the positioning protrusion 2 into the positioning hole 6 is reduced.

[0028] The top of the box cover 4 and the bottom of the box body 1 are provided with anti-skid surfaces, so as to enhance the contact force between the two vertically adjacent box devices, and avoid misalignment of the two vertically adjacent box devices during the process of carrying and moving.

[0029] As shown in the drawings, Figure 1 , Figure 2 , Figure 3 and Figure 4 in some embodiments, further comprising: a first clamping part 7, the box cover 4 is provided with the first clamping part 7 matched with the opening of the box body 1. The first clamping part 7 is clamped into the opening of the box body 1 to form the connection between the box cover 4 and the box body 1.

[0030] In the embodiment, the heat-conducting column 11 is further provided with a clamping groove 13, and the box cover 4 is provided with a second clamping part 8 matched with the clamping groove 13. The second clamping part 8 is clamped into the clamping groove 13 to enhance the connection strength between the box cover 4 and the box body 1.

[0031] The above description is only some or preferred embodiments of the present application, neither the text nor the drawings can limit the scope of protection of the present application. Any equivalent structural transformation based on the content of the specification and drawings, or direct / indirect application in other related technical fields is included in the scope of protection of the present application.

Claims

1. A saggar device for improving the sintering uniformity of lead titanate filter cake, comprising a saggar body (1) having an open upper end and a saggar cover (4) for closing the opening of the saggar body (1), characterized in that, Also comprising: a first micro-porous structure (5), the bottom of the box (1) is provided with the first micro-porous structure (5); a second micro-porous structure (3), the box cover (4) is provided with the second micro-porous structure (3); a supporting step (9), the inside of the box (1) is provided with the supporting step (9), the lead titanate filter cake is placed on the supporting step (9); a heat-conducting column (11), the box (1) is provided with the heat-conducting column (11), the lead titanate filter cake is provided with a through hole matched with the heat-conducting column (11); a plurality of exhaust vertical ribs (10), a plurality of the exhaust vertical ribs (10) are arranged at intervals on the outer circumferential surface of the heat-conducting column (11), and an exhaust passage is formed between the heat-conducting column (11) and adjacent two of the exhaust vertical ribs (10).

2. The saggar device for improving sintering uniformity of lead titanate filter cake according to claim 1, wherein Also comprising: a plurality of supporting members (12), a plurality of the supporting members (12) are arranged at intervals on the bottom of the box (1), and the supporting members (12) partially contact the lead titanate filter cake.

3. The hearth device of claim 1, wherein, Also comprising: a positioning hole (6), the bottom of the box (1) is provided with the positioning hole (6); a positioning protrusion (2), the top end of the box cover (4) is provided with the positioning protrusion (2) matched with the positioning hole (6).

4. The saggar apparatus for improving sintering uniformity of lead titanate filter cake according to claim 1, wherein Also comprising: a first clamping part (7), the box cover (4) is provided with the first clamping part (7) matched with the opening of the box (1).

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