Sintering furnace

Abstract

The utility model provides a firing furnace (1). A bottom structure (10) of the firing furnace (1) is provided with a heat insulation piece (11) arranged on the inner side, a low-water-absorption material (12) arranged in the middle and a metal shell (13) arranged on the outer side. According to the utility model, the low-water-absorption material is arranged between the heat insulation piece arranged on the inner side and the metal shell arranged on the outer side, so that the condition that moisture volatilized from the processed object reaches the near side of the metal shell and dews can be inhibited.

Description

Technical Field

[0001] This utility model relates to a firing furnace. Background Technology

[0002] In the past, for example, roller kilns or other firing furnaces were used to fire cathode materials for lithium-ion batteries. Such firing furnaces typically have an inner heat insulation component and an outer metal shell. However, there are problems such as moisture evaporating from the lithium-ion battery material powder or other fired materials during the firing process, condensation forming near the outer metal shell which is at a lower temperature than the inner heat insulation component, and reduced durability of the furnace materials such as the metal shell due to water accumulation in the furnace. Utility Model Content

[0003] Technical problem to be solved by the utility model

[0004] Therefore, the purpose of this invention is to provide a firing furnace that can prevent water generated and condensed from the processed material from accumulating inside the furnace.

[0005] Technical solutions for solving technical problems

[0006] To solve the above-mentioned technical problems, the first solution of this utility model is a firing furnace (1), characterized in that,

[0007] The bottom structure (10) of the firing furnace (1) includes an insulation member (11) disposed on the inner side, a low water absorption material (12) disposed in the middle, and a metal shell (13) disposed on the outer side.

[0008] Furthermore, the second aspect of this utility model, based on the firing furnace (1) of the first aspect, is characterized in that...

[0009] The metal shell (13) of the bottom structure (10) has a first chamber structure (20), and a plurality of through holes (22) are provided on the upper surface (21) of the first chamber structure (20).

[0010] Furthermore, the third embodiment of this utility model, based on the firing furnace (1) of the first embodiment, is characterized in that...

[0011] The lower surface (23) of the first chamber structure (20) is inclined.

[0012] Furthermore, the fourth embodiment of this utility model, based on the firing furnace (1) of the first embodiment, is characterized in that,

[0013] A drainage section (24) is provided at a low position in the first chamber structure (20).

[0014] Furthermore, the fifth embodiment of this utility model, based on the firing furnace (1) of the first embodiment, is characterized in that,

[0015] The side wall structure (30) of the firing furnace (1) includes a heat insulating member (31) disposed on the inner side, a low water absorption material (32) disposed in the middle, and a metal housing (33) disposed on the outer side.

[0016] In addition, the sixth aspect of the present utility model is based on the firing furnace (1) of the first aspect, and is characterized in that

[0017] The metal housing (33) of the side wall structure (30) has a second chamber structure (40, 50), and the second chamber structure (40, 50) covers the widthwise ends of the conveying roller (4) and / or the rod-shaped heater (5).

[0018] In addition, the seventh aspect of the present utility model is based on the firing furnace (1) of the sixth aspect, and is characterized in that

[0019] A drainage portion (41, 51) is provided at a low position in the second chamber structure (40, 50).

[0020] In addition, the eighth aspect of the present utility model is based on the firing furnace (1) of any one of the first aspect to the seventh aspect, and is characterized in that

[0021] The low water absorption material (12) of the bottom structure (10) and the low water absorption material (32) of the side wall structure (3 are nickel-containing ceramic wool boards (Japanese: nickel-containing ceramic wool panel).

[0022] In addition, the ninth aspect of the present utility model is based on the firing furnace (1) of the eighth aspect, and is characterized in that

[0023] The water absorption rate of the low water absorption material (12) of the bottom structure (10) and the low water absorption material (32) of the side wall structure (30) is 5% or less.

[0024] Effect of the utility model

[0025] According to the present utility model, since a low water absorption material is disposed between the heat insulating member disposed on the inner side and the metal housing disposed on the outer side, it is possible to suppress the situation where moisture volatilized from the object to be processed reaches the vicinity of the metal housing and condenses. Brief description of the drawings

[0026] Figure 1 It is a schematic cross-sectional view of a firing furnace according to an embodiment of the present utility model.

[0027] Figure 2 It is a top view of the first chamber structure of the firing furnace. Detailed description of the preferred embodiments

[0028] The following description uses a roller kiln for lithium-ion battery cathode materials as an example to illustrate the firing furnace involved in the embodiments of this utility model. Figure 1 As shown, the bottom structure 10 of the firing furnace 1 includes an insulation member 11 disposed on the inner side, a low water absorption material 12 disposed in the middle, and a metal shell 13 disposed on the outer side.

[0029] The heat insulation element 11 of the bottom structure 10 and the heat insulation element 31 of the side wall structure 30 (described later), as well as the metal shell 13 of the bottom structure 10 and the heat insulation element 33 of the side wall structure 30 (described later), can be made of well-known materials. Furthermore, the low-absorbency material 12 of the bottom structure 10 and the low-absorbency material 32 of the side wall structure 30 (described later) are preferably made of materials with a water absorption rate of 5% or less as measured according to JIS A5209:2020, such as ceramic cotton boards. For example, nickel-containing ceramic cotton boards have a low water absorption rate and are preferably used as materials for the low-absorbency materials 12 and 32. Such low-absorbency materials 12 and 32 repel moisture on their surface and have difficulty absorbing moisture inside, thus preventing condensation.

[0030] The metal casing 13 of the bottom structure 10 has a first chamber structure 20, and the upper surface 21 of the first chamber structure 20 has a plurality of through holes 22. By forming a plurality of through holes 22 on the upper surface 21 of the first chamber structure 20, moisture volatilized from the processed object can escape into the chamber, preventing condensation from forming on the upper surface 21 of the first chamber structure 20.

[0031] Furthermore, the lower surface 23 of the first chamber structure 20 is formed at an angle. By having such an angled surface, condensed water can be concentrated in one place.

[0032] Furthermore, a drainage section 24 is formed at a low position in the first chamber structure 20. A valve is provided in the drainage section 24, and by opening the valve, water accumulated inside the first chamber structure 20 can be discharged to the outside of the chamber. Additionally, when the valve is closed, it will not affect the atmosphere inside the furnace.

[0033] In addition, the side wall structure 30 of the firing furnace 1 in this embodiment includes a heat insulation member 31 disposed on the inner side, a low water absorption material 32 disposed in the middle, and a metal shell 33 disposed on the outer side.

[0034] The metal housing 33 of the sidewall structure 30 has second chamber structures 40 and 50 covering the ends of the conveyor roller 4 and the rod-shaped heater 5 in the width direction. Drainage portions 41 and 51 are located at the lower positions of the second chamber structures 40 and 50. While there is a possibility of electrical leakage when water accumulates in the second chamber structures 40 and 50, valves are provided in the drainage portions 41 and 51. By opening the valves, the water accumulated inside the second chamber structures 40 and 50 can be discharged to the outside of the chambers. Furthermore, when the valves are closed, the atmosphere inside the furnace will not be affected.

[0035] According to the firing furnace 1 of this embodiment, a low water absorption material 12, 32 is disposed between the heat insulation members 11, 31 disposed on the inner side and the metal shell 13, 33 disposed on the outer side, so as to suppress the situation where moisture volatilized from the processed material reaches the vicinity of the metal shell and condenses.

[0036] Symbol Explanation

[0037] 1: Firing furnace

[0038] 4: Conveyor Rollers

[0039] 5: Heater

[0040] 10: Bottom Structure

[0041] 11, 12: Thermal insulation components

[0042] 12, 32: Low water absorption materials

[0043] 13, 33: Metal casing

[0044] 20: First chamber structure

[0045] 21: Upper surface of the first chamber structure

[0046] 22: Through hole

[0047] 23: Lower surface of the first chamber structure

[0048] 24, 41, 51: Drainage Department

[0049] 30: Sidewall Structure

[0050] 40, 50: Second chamber structure.

Claims

1. A firing furnace (1), characterized in that, The bottom structure (10) of the firing furnace (1) includes an insulation member disposed on the inner side, a low water absorption material disposed in the middle, and a metal shell disposed on the outer side.

2. The firing furnace (1) according to claim 1, characterized in that, The metal shell of the bottom structure (10) has a first chamber structure (20). The upper surface (21) of the first chamber structure (20) has a plurality of through holes (22).

3. The firing furnace (1) according to claim 2, characterized in that, The lower surface (23) of the first chamber structure (20) is inclined.

4. The firing furnace (1) according to claim 2, characterized in that, A drainage section is provided at a low position in the first chamber structure (20).

5. The firing furnace (1) according to claim 2, characterized in that, The side wall structure (30) of the firing furnace (1) includes an insulation member disposed on the inner side, a low water absorption material disposed in the middle, and a metal shell disposed on the outer side.

6. The firing furnace (1) according to claim 5, characterized in that, The metal housing of the sidewall structure (30) has a second chamber structure (40, 50) that covers the width-direction ends of the conveying roller (4) and / or the rod-shaped heater (5).

7. The firing furnace (1) according to claim 6, characterized in that, A drainage section is provided at the lower position of the second chamber structure (40, 50).

8. The firing furnace (1) according to any one of claims 1 to 7, characterized in that, The low-absorbency material of the bottom structure (10) and the low-absorbency material of the sidewall structure (30) are nickel-containing ceramic cotton boards.

9. The firing furnace (1) according to claim 8, characterized in that, The water absorption rate of the low-absorbency material of the bottom structure (10) and the low-absorbency material of the sidewall structure (30) is less than 5%.

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