SU1651063A1 - Tunnel kiln furnace for annealing ceramic articles - Google Patents

Abstract

The invention relates to heating furnaces for firing ceramics, mainly condensers, and is aimed at improving the performance and quality of firing products by stabilizing the temperature of reA / A / x / e ffi0 Ґ /% / v o 13 7Z2Z2Zb vxsr 13 ljjfSJ fJJfJJJAM.-tV-iJ y- + SStSS7-n I / / / / AU / lgl //// L, y, y // le U-P777eL I / // s; rl Gggggg UUUGGGZ r frrJPfjfjrirfsjj s fJ f y fffSSffSSSSfSfSfssSSfSfJJLfJ fj rf r j-ffrrfffSj j ffffArfffsss ssssffSffff t has to be off the quest for a quest The furnace is equipped with a tilting chamber 10, a vent-casing 11 and U-shaped frames-partitions 12, forming in the zone 1 and zone 3 the lockable temperature compartments 13. With the help of an air curtain created by the vent casing 11 and formed with the help of the P-Brai The town 12 airlock temperature compartments 13 billet the products subjected to stable preheating. In the tilting chamber 10, the products are cooled intensively and evenly, with up to 30-4СРс, which, when leaving them from the oven, prevents thermal shock. 5 il. in 2) 3 h 3 4 13 P 13 -tV-iJ y- + SStSS7-n I / / / / y, y // le U-P777eL I / // irfsjj s fJ fy ffffSSffSSSSfSfSfssSSfSfJJLffJ fj ffSfffff t fm / SA, u (/ ct F: d about SG5 W bL

Description

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The invention relates to the field of heating furnaces, in particular, to Tunnel furnaces for firing ceramic products, and can be used in radio-electronic technology prior to the manufacture of ceramic monolithic capacitors,

The purpose of the invention is to increase the productivity and quality of firing products by stabilizing the furnace temperature conditions along the length and height of the channel and ensuring uniform cooling at the exit from the furnace.

Figure 1 shows a furnace, a longitudinal section; figure 2 - section aa And Fig; on fig.Z - section b-b in fig, 1; figure 4 is a section bb In figure 1; on fig.Z - section GG in figure 1.

The tunnel kiln consists of a lined slotted channel with successively located in the direction of movement of the calcined products zone 1 of preheating, zone 2 of calcination and cooling zone 3, fixed refractory plates 4, through which the composition of movable refractory plates 5 moves through the channel to transport calcined products, system of ventilation ducts 6 for removal from zone 1 of pre-heating of the combustion products of technological connection of products 9 of the system of ventilation ducts 7 for cooling Slabs 5 with products in the cooling zone 3, heaters 8 and thermocouples 9 installed along the length of the channel in zones 1-3, the tilting chamber 10, the ventilation casing 11 of the U-shaped frame partitions 12 separating the preheating zone 1 and cooling zone 3 to the sluice temperature compartments 13, and the base (frame) 14, on which the main structural elements of the furnace are mounted.

The vent casing 11 is installed at the entrance of the preheating zone 1 and serves to cut off the furnace channel from the cold air streams as a result of creating an air curtain due to the geometric head regardless of the channel zones.

The system of ventilation channels 6 in the preheating zone 1 in the form of openings in the upper and lower parts of the channel serves to exit the products of combustion of the binder and to regulate

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air entry and exit. At the same time, air enters through the lower orifices and exits through the upper ones, washes the channel and prevents the zone 2 from being contaminated by the products of combustion of the binder.

Ventilation duct system

7, in the cooling zone 2, in the form of holes in the lower and side portions of the channel, serves to cool the movable plates 5 with the fired products 15 and to equalize the temperature along the height of the charge. When this air enters through the lower hole and out through the side.

The tiller chamber 10 is made of a highly heat-conducting material, such as metal, in the form of a slotted duct installed at the exit of the cooling zone 3. The chamber 10 serves to finally cool the movable plates 5 with the products 15 and equalize the charge temperature to 30-40 ° C in order to prevent thermal shock of the products.

U-shaped baffles 12 are made of 1 refractory material and are placed along the length of the channel in the preheating zone 1 and in the cooling zone 3 and form sluice temperature compartments 13 along the channel length

In this case, when the plate 5 enters with the products being burned 15 into the partition-partition frame 12, the channel is sufficiently densely overlapped in height and compartments 13 are created along the channel length, the temperature of which does not adversely affect each other. firing mode along the length and cross section of the channel.

The tunnel oven works as follows.

Preliminarily, using electric heaters 8 located along the channel length and connected to the furnace electrical cabinet (not shown), the furnace channel in zones 1 to 3 sets the required firing temperature of the products 15. Temperature control is controlled by thermocouples 9 installed along the channel length in zones 1–3 and associated with a control panel (not shown). The calcined products 15 are then placed on movable plates 5, which are pushed through stationary plates 4 (furnace bottom) with the help of a pusher (not shown) through the furnace channel, namely through the preheating zone 1, the calcining zone 2, the cooling zone 3 and the tidal chamber 10 In the preheating zone 1, burnout occurs from the products 15 of the technological bundle, which is removed through the system of ventilation ducts 6. With the help of an air curtain,

temperature conditions along the length and cross section of the channel, as well as reducing the power consumption per unit of output by 1.3-1.5 times.

Claims (1)

Invention Formula Tunnel kiln for ceramic products, mostly many the ventilating cover provided by the 11, 10-layer capacitors, containing and formed with the help of U-shaped partitions 12 lockable temperature compartments 13, the workpieces 15 are subjected to stable preheating. After this product 15) $ enters zone 2 and is subjected to final calcination (sintering). Baked items 15 are moved to the cooling zone 3 where, in the formed lined channel with successive zones of preliminary heating, burning and cooling, means of transporting products, transverse partitions located along the length of the furnace, a ventilation device that is different in order to increase the productivity and quality of burning products a lined channel with consecutive pre-heating, roasting and cooling zones, means of transporting products, transverse partitions placed along the length of the furnace, a ventilation device that is characterized in that, in order to increase the productivity and quality of the roasting of put products the sluice temperature compartments 13 and with 2Q temperature stabilization using the ventilation channels 7, the movable plate 5 with the products 15 is cooled to 100-150 ° C along the height of the charge, and then cooled and evenly cooled to 10-40 ° C that when they exit the oven prevents thermal shock. The use of the kiln in the ceramic co-capacitor allows the baking along the length and height of the channel and about the liver to be uniformly cooled on the passage from the furnace; it is equipped with a tangible to 25 gauge, made in the form of a highly conductive slotted channel closed behind the cooling zone, and located at the entrance pre-heating zones of the ventilation channels to create reduce the productivity by 2-4 times for the air curtain, at the same time dividing the expense of the possibility of multiple loads of products during firing, improve quality and reduce losses during firing from 20-30 to 3-4% as a result of stabilization AA The kn are made in the form of U-shaped frames and are installed sequentially one after the other along the entire length of the preheating and cooling zones. layer capacitors containing a lined channel with consecutive preheating, calcining and cooling zones, means of transporting products, transverse partitions placed along the length of the furnace, a ventilation device, characterized in that, in order to increase the productivity and quality of calcination of products by temperature stabilization temperature stabilization the furnace along the length and height of the channel and ensure uniform cooling at the exit of the furnace, it is equipped with a tilting chamber installed behind the cooling zone, made in the form of a highly heat-conducting slot-hole channel closed at the end, and ventilation ducts located at the inlet of the preheating zone air curtain, with the partition The kn are made in the form of U-shaped frames and are installed sequentially one after the other along the entire length of the preheating and cooling zones. H V dd Јйлф but- C9CIS91 Yr FIG. five