阅读说明：本技术 一种网带炉及其应用 (Mesh belt furnace and application thereof ) 是由 温浩月 于 2019-11-18 设计创作，主要内容包括：本发明涉及粉末冶金领域,提供一种网带炉及其应用,用于提高网带炉的烧结或脱脂效率。本发明提供的一种网带炉及其应用,包括加热装置、传输装置,所述的传输装置包括循环网带,所述的加热装置包括加热隧道和加热组件,所述的循环网带的一部分穿过加热隧道的炉膛,所述的加热隧道包括预热区、烧结区和冷却区,所述的加热组件包裹在烧结区外侧。循环网带带动原料件在从炉膛内经过,依次经过预热、烧结和冷却后出料,炉膛内的加热环境中由液氨分解产生的气体进行保护。(The invention relates to the field of powder metallurgy, and provides a mesh belt furnace and application thereof, which are used for improving sintering or degreasing efficiency of the mesh belt furnace. The invention provides a mesh belt furnace and application thereof, comprising a heating device and a conveying device, wherein the conveying device comprises a circulating mesh belt, the heating device comprises a heating tunnel and a heating assembly, one part of the circulating mesh belt passes through a hearth of the heating tunnel, the heating tunnel comprises a preheating zone, a sintering zone and a cooling zone, and the heating assembly is wrapped outside the sintering zone. The circulating mesh belt drives the raw material piece to pass through the hearth, and the raw material piece is sequentially preheated, sintered and cooled to be discharged, and gas generated by decomposition of liquid ammonia in a heating environment in the hearth is protected.)

1. The mesh belt furnace is characterized by comprising a heating device and a conveying device, wherein the conveying device comprises a circulating mesh belt, the heating device comprises a heating tunnel and a heating assembly, one part of the circulating mesh belt penetrates through a hearth of the heating tunnel, the heating tunnel comprises a preheating zone, a sintering zone and a cooling zone, and the heating assembly is wrapped outside the sintering zone.

2. The mesh belt furnace of claim 1, wherein the preheating zone is connected to the sintering zone by a connecting tunnel, and the preheating zone forms an angle of 0 to 30 ° with the sintering zone.

3. The mesh belt furnace as claimed in claim 1, wherein an ignition port is arranged at the upper part of the preheating zone, and the ignition port is connected with the inner wall of the hearth through a pipeline; the preheating zone bottom set up the liquid outlet, the liquid outlet pass through the pipeline and be connected with furnace inner wall.

4. The mesh belt furnace as claimed in claim 1, wherein the heating assembly wraps the outer wall of the sintering zone, the heating assembly comprising heating elements and thermocouples disposed between the two sets of heating elements.

5. The mesh belt furnace according to claim 1, wherein the sintering zone is connected with the cooling zone through a connecting tunnel, the cooling zone is provided with a cooling water tank, the cooling water tank is arranged on the connecting tunnel between the cooling zone and the sintering zone, the connecting tunnel is horizontally arranged, the cooling zone is inclined downwards, and an included angle formed by the cooling zone and a connecting pipeline is 0-60 degrees.

6. The mesh belt furnace as claimed in claim 1, wherein the heating tunnel is provided with an aeration port, the aeration port is connected with the liquid ammonia decomposition device, and the aeration port is arranged at a position close to the cooling zone in the heating tunnel.

7. The application of the mesh belt furnace is characterized in that the mesh belt furnace is used for sintering, and the sintering application method of the mesh belt furnace comprises the following steps:

charging decomposed gas of liquid ammonia, and igniting at an ignition port after a period of time;

conveying the raw material pieces to a heating tunnel through a conveying device, preheating the raw material pieces, entering a sintering region, sintering the raw material pieces, cooling the raw material pieces by a cooling region, and discharging the raw material pieces;

the preheating, sintering and cooling processes are carried out under the protection of mixed gas generated by decomposing liquid ammonia.

8. The use of the mesh belt furnace according to claim 7, wherein the preheating temperature is 200-300 ℃, and the preheating time is 1-3 h.

9. The application of the mesh belt furnace according to claim 7, characterized in that the sintering temperature is 1000-1150 ℃, the sintering time is 2-4 h, and the rotating speed of the conveying mesh belt is 50-200 mm/min.

10. The application of the mesh belt furnace is characterized in that the mesh belt furnace is used for degreasing, and the degreasing application method of the mesh belt furnace comprises the following steps:

charging decomposed gas of liquid ammonia, and igniting at an ignition port after a period of time;

conveying the raw material pieces to a heating tunnel through a conveying device, preheating the raw material pieces, entering a sintering region, sintering the raw material pieces, cooling the raw material pieces by a cooling region, and discharging the raw material pieces;

the preheating, sintering and cooling processes are carried out under the protection of mixed gas generated by decomposing liquid ammonia;

the preheating temperature is 50-80 ℃, and the preheating time is 1-3 h;

the sintering temperature is 100-150 ℃, the sintering time is 2-4 h, and the speed of the transmission mesh belt is 50-200 mm/min.

Technical Field

The invention relates to the field of powder metallurgy, in particular to a mesh belt furnace and application thereof.

Background

Mesh belt furnaces are generally sintering furnaces in which a muffle-protected mesh belt conveys parts continuously in the furnace. The method is mainly used for sintering powder metallurgy products, reducing metal powder and pre-sintering, sintering or heat treatment of electronic products in protective atmosphere or air.

The sintering or degreasing of the mesh belt furnace can effectively improve the production efficiency of powder metallurgy, but the mesh belt furnace needs to be adjusted in order to further improve the efficiency and save the cost.

Disclosure of Invention

The invention provides a mesh belt furnace and application thereof, aiming at improving sintering or degreasing efficiency of the mesh belt furnace.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

the utility model provides a guipure stove and application, includes heating device, transmission device, the transmission device include the circulation guipure, heating device include heating tunnel and heating element, a part of circulation guipure pass the furnace in heating tunnel, the heating tunnel include preheating zone, sintering zone and cooling zone, the heating element parcel in the sintering zone outside.

The circulating mesh belt drives the raw material piece to pass through the hearth, and the raw material piece is sequentially preheated, sintered and cooled to be discharged, and gas generated by decomposition of liquid ammonia in a heating environment in the hearth is protected.

The whole system can effectively process the alloy and efficiently carry out sintering degreasing.

Preferably, the preheating zone is connected with the sintering zone through a connecting tunnel, and the angle formed by the preheating zone and the sintering zone is 0-30 degrees. The preheating zone contains a large amount of hydrogen and nitrogen, and the preheating zone is inclined downwards at a certain angle, so that the gas and the tunnel inlet can be effectively prevented from overflowing outwards.

Preferably, an ignition port is arranged at the upper part of the preheating zone and is connected with the inner wall of the hearth through a pipeline; the preheating zone bottom set up the liquid outlet, the liquid outlet pass through the pipeline and be connected with furnace inner wall. The ignition port is used for consuming overflowed combustible hydrogen and maintaining safe production; the liquid outlet discharges organic matters dissipated from the raw material part in the high-temperature heating engineering.

Preferably, the heating assembly wraps the outer wall of the sintering zone, and the heating assembly comprises heating elements and thermocouples, and the thermocouples are arranged between the two groups of heating elements. The thermocouple is used for detecting the temperature of heating element, realizes accurate control, and heating element heating tunnel provides the sintering or the necessary temperature of degrease.

Preferably, the sintering area is connected with the cooling area through a connecting tunnel, the cooling area is provided with a cooling water tank, the cooling water tank is arranged on the connecting tunnel between the cooling area and the sintering area, the connecting tunnel is horizontally arranged, the cooling area is inclined downwards, and an included angle formed by the cooling area and the connecting pipeline is 0-60 degrees. The cooling zone is used for reducing the temperature of the raw material piece to a reasonable temperature, and the raw material piece is prevented from being damaged due to sudden change of the temperature.

Preferably, the heating tunnel is provided with an inflation inlet, the inflation inlet is connected with the liquid ammonia decomposition device, and the inflation inlet is arranged at a position, close to the cooling area, of the heating tunnel. The gas filling port is used for filling nitrogen and hydrogen into the hearth and simultaneously supplementing protective atmosphere for the hearth.

The application of the mesh belt furnace for sintering comprises the following steps:

charging decomposed gas of liquid ammonia, and igniting at an ignition port after a period of time;

conveying the raw material pieces to a heating tunnel through a conveying device, preheating the raw material pieces, entering a sintering region, sintering the raw material pieces, cooling the raw material pieces by a cooling region, and discharging the raw material pieces;

the preheating, sintering and cooling processes are carried out under the protection of mixed gas generated by decomposing liquid ammonia. The cost of the mixed gas generated by decomposing the liquid ammonia is lower, and the sintering influence on the powder metallurgy product is smaller.

Preferably, the preheating temperature is 200-300 ℃, and the preheating time is 1-3 h. The preheating temperature is ensured.

Preferably, the sintering temperature is 1000-1150 ℃, the sintering time is 2-4 h, and the rotating speed of the transmission mesh belt is 50-200 mm/min. In the temperature range and the sintering time, the raw material piece can be fully sintered.

The application of the mesh belt furnace for degreasing comprises the following steps:

charging decomposed gas of liquid ammonia, and igniting at an ignition port after a period of time;

conveying the raw material pieces to a heating tunnel through a conveying device, preheating the raw material pieces, entering a sintering region, sintering the raw material pieces, cooling the raw material pieces by a cooling region, and discharging the raw material pieces;

the preheating, sintering and cooling processes are carried out under the protection of mixed gas generated by decomposing liquid ammonia;

the preheating temperature is 50-80 ℃, and the preheating time is 1-3 h;

the sintering temperature is 100-150 ℃, the sintering time is 2-4 h, and the speed of the transmission mesh belt is 50-200 mm/min. Corresponding operation parameters are adjusted, the mesh belt furnace can be applied to a degreasing process, and a good degreasing effect can be achieved.

Compared with the prior art, the invention has the beneficial effects that: the circulating mesh belt drives the raw material piece to pass through the hearth, and the raw material piece is sequentially preheated, sintered and cooled and then discharged, and gas generated by decomposing liquid ammonia in a heating environment in the hearth is protected; the sintering and degreasing efficiency can be effectively improved, and the cost is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a mesh belt furnace.

Fig. 2 is a schematic structural view of the heating tunnel in fig. 1.

Fig. 3 is a side view of fig. 1.

Fig. 4 is a top view of fig. 1.

Wherein: 1. the device comprises a circulating mesh belt, 11, a motor, 21, a heating tunnel, 22, a heating assembly, 211, a preheating zone, 212, a sintering zone, 213, a cooling zone, 214, a connecting tunnel, 215, an ignition port, 216, a cooling water tank, 217, a connecting piece, 221 and a thermocouple.

Detailed Description

The following examples are further illustrative of the present invention and are not intended to be limiting thereof.