CN211339285U - Be applied to crystallization kiln of microcrystalline glass production - Google Patents

Abstract

The utility model provides a crystallization kiln applied to the verification of the glass-ceramic production process, belonging to the technical field of the crystallization kiln manufacturing equipment applied to the production of the micro-ceramics. The crystallization kiln used in the production of glass-ceramic has movable insulation doors at the front and rear ends, and a heating device, a glass consignment roller table and a cooling device are arranged inside, and the glass consignment roller table is connected with a reducer, The reducer is connected with the motor, and the motor drives the glass consignment roller table to rotate forward and reverse through the control of the controller. The crystallizing kiln provided by the utility model has a length of 10-15m, which saves investment costs. By arranging a glass consignment roller table, a motor and a reducer in the crystallizing kiln, the glass-ceramic can be forwarded and reversed inside the crystallizing kiln. At the same time, the current of the heating resistance wire is controlled by the thyristor, the temperature in the crystallization kiln, and the structural setting of the cooling fan are controlled, so that the glass-ceramic can realize the steps of nucleation, crystallization and annealing in the crystallization kiln.

Description

A crystallization kiln applied to glass-ceramic production

technical field

The utility model belongs to the technical field of glass-ceramic production equipment, in particular to a crystallization kiln applied to the production of micro-ceramics.

Background technique

Glass-ceramic is an inorganic non-metallic material. It is a new type of building material that has not been developed for a long time. Glass-ceramic looks different from our common glass. With the dual characteristics of glass and ceramics, the arrangement of atoms in ordinary glass is irregular, which is one of the reasons why glass is fragile. And glass-ceramic, like ceramics, is composed of crystals, and its atomic arrangement is regular. Therefore, glass-ceramic has higher brightness than ceramics and stronger toughness than glass.

The preparation process of the existing glass-ceramic includes the following steps: 1. Designing glass components according to the performance requirements of the glass-ceramic; 2. Designing glass raw materials according to the glass components; 3. Mixing the correctly weighed glass raw materials evenly; 4. Throwing 5. The glass liquid is rolled into a plate by a water-passing calender; 6. It enters the crystallizing kiln, nucleated, crystallized and annealed into a crystallized plate; 7. The crystallized plate is polished and cut into a plate. product for sale.

The length of the currently used crystallization kiln is about 200-400 meters. This is because to make the glass plate into a crystallized plate, the crystal nucleating agent must form a crystal nucleus in the glass, and the crystal nucleus must be grown by heat treatment. After annealing and slow cooling, it takes time to complete these. Generally, the glass nucleation time is 1-1.5 hours, the crystallization time is 1-2 hours, and the annealing time is 2-3 hours. In this way, the kiln needs to be long to complete the nucleation. The process of crystallization, crystallization and annealing, otherwise, the quality of the microcrystalline plate will be poor, and even the plate will not be produced.

The existing crystallization kiln is very long, so the cost is high. How to achieve the purpose of realizing the requirements of the glass-ceramic preparation process with a small investment cost is an urgent problem to be solved.

Utility model content

The utility model solves the problems of long length and high investment cost of the existing crystallization kiln by providing a crystallization kiln applied to the production of glass-ceramic.

To achieve the above object, the technical solution of the present utility model is:

The utility model relates to a crystallization kiln applied to the production of glass-ceramic. The crystallization kiln is in the form of a sealed cavity. The front and rear ends of the crystallization kiln are provided with movable thermal insulation doors. , the glass consignment roller table is connected with the reducer, the reducer is connected with the motor, and the motor is controlled by the controller to drive the glass consignment roller table to rotate forward and reverse.

Preferably, the heating device includes a heating resistance wire, the heating resistance wire is connected with a thyristor, and the current of the heating resistance wire is controlled by the thyristor to control the temperature in the crystallization kiln.

Preferably, the heating resistance wire is wound on a ceramic rod fixed in the crystallization kiln.

Preferably, the cooling device includes a cooling fan and a cooling air duct, the cooling fan is arranged outside the crystallization kiln, and the cooling air duct is arranged inside the crystallization kiln and is connected to the cooling fan through a connecting hose.

Preferably, the cooling air ducts are two layers, which are respectively arranged on the upper and lower sides of the glass consignment roller table.

Preferably, the cooling air duct is spaced apart from the ceramic rod.

Preferably, movable shutters are also provided at the front and rear ends of the crystallization kiln.

Preferably, the distance between the shutter and the thermal insulation door is 0.5-1 m.

Preferably, the length of the crystallization kiln is 10-15m.

The beneficial effects of the present utility model are:

1. The length of the crystallizing kiln provided by the utility model is 10-15m, which greatly saves the investment cost. By setting the glass consignment roller table, the motor and the reducer in the crystallizing kiln, the glass-ceramics are carried out in the crystallizing kiln. At the same time, the current of the heating resistance wire is controlled by the thyristor, the temperature in the crystallization kiln, and the structural setting of the cooling fan, so that the glass-ceramic can realize nucleation, crystallization and annealing in the crystallization kiln step.

2. There are movable gates at the front and rear ends of the crystallization kiln, which play a role of heat insulation. The glass-ceramic moves forward and reverse in the area limited by the front and rear gates, so that the glass-ceramic is heated evenly.

Description of drawings

Figure 1 is a schematic diagram of the cross-sectional structure of the present invention.

Figure 2 is a schematic structural diagram of the heating device of the present invention.

3 is a schematic structural diagram of the cooling device of the present invention.

In the picture: 1-insulation door; 2-glass consignment roller table; 21-gear rack; 3-glass-ceramic plate; 4-heating resistance wire; 41-ceramic rod; 5-cooling fan; 51-cooling air duct; 52-connecting hose; 53-large cooling air duct; 6-gate.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the difference between the various components under a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In the present utility model, unless otherwise expressly specified and limited, the terms "connection", "fixed" and the like should be understood in a broad sense, for example, "fixed" can be a fixed connection, a detachable connection, or an integrated; It can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements, unless otherwise expressly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such technical solutions The combination does not exist and is not within the protection scope required by the present invention.

Referring to Fig. 1, a crystallization kiln applied to the production of glass-ceramics, the crystallization kiln is a sealed cavity, the front and rear ends of the crystallization kiln are provided with movable thermal insulation doors 1, and the interior is provided with a heating device, glass consignment Roller table 2 and cooling device, the glass consignment roller table 2 is connected with the reducer, the reducer is connected with the motor (not shown in the figure), and the motor is controlled by the controller to drive the glass consignment roller table to rotate forward and reverse.

The length of the above-mentioned crystallization kiln is 10-15m, preferably 12m. The crystallization kiln is made of thermal insulation bricks, iron plates and angle iron supports. The thermal insulation door 1 is a movable and sealable thermal insulation door. 3 Open the thermal insulation door 1 when entering and leaving the crystallization kiln. A heating device is arranged in the crystallization kiln to increase the temperature inside the crystallization kiln, so that the glass-ceramic plate 3 can complete the nucleation and crystallization steps in the crystallization kiln. After cooling down, the glass-ceramic completes the annealing process. Generally, the glass nucleation time is 1-1.5 hours, the crystallization time is 1-2 hours, and the annealing time is 2-3 hours; Move forward; when the glass consignment roller 2 rotates in the reverse direction, the glass-ceramic plate 3 moves backward, so that the glass-ceramic plate 3 can move repeatedly in the crystallization kiln, so that the glass-ceramic plate is heated evenly. The glass consignment roller table 2 is connected with the reducer through the gear rack 21, the reducer is connected with the motor, and the controller controls the forward and reverse rotation of the motor, so as to drive the glass consignment roller table to rotate in the forward and reverse directions through the reducer. , the connection between the glass consignment roller table 2 and the reducer adopts the conventional method. As shown in Fig. 2, the glass carrier rollers are installed on the side wall of the crystallization kiln through the bearing seat 70, the glass carrier rollers are connected by the sprocket 71 to form the glass carrier roller table 2, the motor 72 is placed on the bracket 73, the reducer 74 Connected with the motor 72, the reducer 74 is connected with the sprocket 71, thereby driving the glass consignment roller table 2 to rotate.

Further, as shown in FIG. 2, the heating device includes a heating resistance wire 4, the heating resistance wire 4 is connected with the thyristor, and the current of the heating resistance wire 4 is controlled by the thyristor to control the temperature in the crystallization kiln. . The heating resistance wire 4 is wound on a ceramic rod 41 fixed in the crystallization kiln.

The above-mentioned ceramic rods 41 are fixed in the crystallization kiln, and are arranged above and below the glass consignment roller table 2 with a vertical distance of about 150 mm from the glass-ceramic plate 3, and are arranged in rows with the same spacing between the ceramic rods 41. The heating resistance wire 4 is wound on the ceramic rod, so that the temperature of each part inside the crystallization kiln is consistent, and the joint of the heating resistance wire is arranged in the safety shield 42 on the outer side wall of the crystallization kiln. The current of the heating resistance wire is controlled by the thyristor to adjust the temperature in the crystallization kiln.

Further, as shown in FIG. 3, the cooling device includes a cooling fan 5 and a cooling air duct 51, the cooling fan 5 is arranged outside the crystallization kiln, and the cooling air duct 51 is arranged inside the crystallization kiln and is connected to the The duct 52 is connected to the cooling fan 5 . Preferably, the cooling air ducts are two layers, which are respectively arranged on the upper and lower sides of the glass consignment roller table. Preferably, the cooling air duct is spaced apart from the ceramic rod.

In the annealing stage of the above-mentioned glass-ceramic plate 3, the cooling air is drawn into the cooling air duct 51 by the cooling fan 5 to cool the temperature in the crystallization kiln. Specifically, a large cooling air duct 53 is arranged at the air inlet of the cooling fan 5, and the large cooling air duct 53 is arranged on the top of the crystallization kiln and the bottom of the crystallization kiln. The cooling air duct 51 inside the crystallization kiln is as follows: Two layers, the upper cooling air duct is connected to the top large cooling air duct 53 through the connecting hose 52, and the lower cooling air duct is connected to the lower large cooling air duct through the connecting hose. The cooling air ducts 51 on the upper and lower layers are flush with the heating resistance wire 4, and are arranged at intervals from the heating resistance wire 4, so as to achieve the purpose of making the temperature of each part in the crystallization kiln uniform.

Further, movable shutters 6 are also provided at the front and rear ends of the crystallization kiln. Preferably, the distance between the shutter 6 and the thermal insulation door 1 is 0.5-1 m.

Since the front and rear ends of the crystallization kiln are connected with different equipment, the temperature of the calender connected at the front end is relatively high, which easily affects the temperature at the front end of the crystallization kiln, resulting in uneven temperature inside the crystallization kiln. Therefore, in the present application, movable shutters 6 are also provided at the front and rear ends of the crystallization kiln, which play the role of heat insulation. The distance between the shutter 6 and the heat preservation door is 0.5-1 m, and a sealing structure can be arranged between the shutter 6 and the crystallization kiln.

The process steps of the present application for glass-ceramic processing are:

1. Before the glass plate is discharged from the calender, the thermal insulation doors at the entrance and exit of the crystallization kiln are sealed separately, the front and rear gates are lowered 50mm away from the plate surface, and the temperature of the crystallization kiln is stable at 700℃;

2. When the glass plate is taken out from the calender, open the movable and sealed insulation door at the entrance of the kiln. When the glass plate enters the crystallization kiln for 9 meters, disconnect the plate of the calender and wait for the 9 meters of glass-ceramic After all the plates enter the crystallization kiln, seal the thermal insulation door at the entrance of the kiln;

3. The glass-ceramic moves forward under the drive of the glass consignment roller. When the glass-ceramic plate is 200mm away from the rear gate, the glass consignment roller is driven in reverse by the motor. When the glass plate is 200mm away from the front gate When the transmission is reversed, it moves back and forth like this;

4. The temperature control in the crystallization kiln is adjusted according to the temperature requirements for the nucleation and crystallization of the glass-ceramic;

5. When the glass-ceramic is completed, slowly cool down, start the cooling fan, and adjust the fan frequency according to the cooling speed;

6. After the cooling is completed, open the sealed insulation door at the outlet of the kiln, remove the glass-ceramic plate, and complete the crystallization annealing process.

The above are only the embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and accompanying drawings of the present invention, or directly or indirectly applied to other Relevant technical fields are similarly included in the scope of patent protection of the present invention.

Claims (9)

1. The utility model provides a be applied to crystallization kiln of microcrystalline glass production which characterized in that, crystallization kiln is sealed cavity, and both ends are equipped with mobilizable heat preservation door around the crystallization kiln, and inside is equipped with heating device, glass delivery roll table and cooling device, the glass delivery roll table is connected with the speed reducer, and the speed reducer is connected with the motor, and the motor passes through controller control and drives glass delivery roll table forward, reverse rotation.

2. The crystallization kiln applied to microcrystalline glass production as claimed in claim 1, wherein the heating device comprises a heating resistance wire, the heating resistance wire is connected with a thyristor, and the temperature in the crystallization kiln is controlled by controlling the current of the heating resistance wire through the thyristor.

3. The crystallization kiln for producing microcrystalline glass as claimed in claim 2, wherein the heating resistance wire is wound around a ceramic rod fixed in the crystallization kiln.

4. The crystallization kiln for producing microcrystalline glass as claimed in claim 3, wherein the cooling device comprises a cooling fan and a cooling air pipe, the cooling fan is arranged outside the crystallization kiln, and the cooling air pipe is arranged inside the crystallization kiln and connected with the cooling fan through a connecting hose.

5. The crystallization kiln for producing microcrystalline glass according to claim 4, wherein the cooling air pipes are two layers and are respectively arranged at the upper side and the lower side of the glass delivery roller way.

6. The crystallization kiln for producing microcrystalline glass as claimed in claim 5, wherein the cooling air pipe is spaced from the ceramic rod.

7. The crystallization kiln for producing microcrystalline glass according to any one of claims 1 to 6, wherein movable shutters are further arranged at the front end and the rear end of the crystallization kiln.

8. The crystallization kiln for producing microcrystalline glass as claimed in claim 7, wherein the distance between the gate plate and the heat preservation door is 0.5-1 m.

9. The crystallization kiln for producing microcrystalline glass as claimed in claim 8, wherein the length of the crystallization kiln is 10-15 m.

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