WO2020000591A1 - Tunnel kiln firing system for foamed ceramic lightweight board - Google Patents

Abstract

Disclosed is a tunnel kiln firing system for a foamed ceramic lightweight board, comprising a kiln vehicle, a loading line, a tunnel kiln and an unloading line, wherein the kiln vehicle comprises a rack, and a sagger is arranged on the rack and comprises a subplate, an enclosure and high-temperature resistant paper, the enclosure being arranged at the periphery of the subplate, and the high-temperature resistant paper being respectively arranged on the subplate and the enclosure. The loading line comprises: a cleaning unit for cleaning the subplate and the enclosure, a first laying unit for laying the high-temperature-resistant paper on the subplate, an enclosure arrangement unit for arranging the enclosure on the subplate, a second laying unit for laying the high-temperature-resistant paper on the enclosure, a material distribution unit for distributing material on the sagger formed by the subplate, the enclosure and the high-temperature resistant paper, and a conveying unit for conveying the kiln vehicle after material distribution to the tunnel kiln.

Description

Tunnel kiln firing system of foamed ceramic light board Technical field

The invention relates to the technical field of ceramic plates, in particular to a tunnel kiln firing system for foamed ceramic light plates.

Background technique

The matrix material used in foamed ceramics comes from wastes from ceramics factories and industrial wastes (such as ceramic tile polishing residues or coal residues or stone waste residues). If these wastes are left untreated, the random accumulation or landfill will cause pollution to the environment. Wasted resources.

The foamed ceramic products gradually began to be used nationwide due to its advantages such as light weight, high strength, fire resistance, earthquake resistance, heat insulation, sound insulation, strong combination, easy handling, and wide application. And because its raw materials are solid waste such as coal slag, ceramic tile polishing slag, slag, etc., it has positive social significance in making full use of resources and environmental protection.

The existing formula system of foamed ceramics generally includes tile polishing waste residue and foaming agent, and the amount of tile polishing waste residue is relatively small, mostly about 50%. The amount of foaming agent added is about 1.2%, the amount of foaming agent is large, and the cost is high. Because the existing foamed bricks are relatively thick, the formula system is relatively difficult to oxidize. The formula system of foamed ceramics determines that they must be fired in a tunnel kiln. The firing cycle of a tunnel kiln is generally 24-26 hours, and the firing cycle is long. Higher temperature.

Moreover, as shown in FIG. 1, the foamed ceramic plate produced in the prior art has multiple layers of air holes formed therein. During the foaming process, due to the longer foaming time and the influence of gravity, the lower air pores will be flattened, making the overall uniformity of the product poor.

In addition, the existing tunnel kiln burning in Chengdu is a single-layer stack burning, which is basically manual operation, requires a lot of manpower, has low efficiency and high cost.

Summary of the invention

The technical problem to be solved by the present invention is to provide a tunnel kiln firing system for foamed ceramic lightweight plates, which realizes multi-layer firing, has high degree of automation, high production efficiency, and saves cost and space.

The technical problem to be solved by the present invention is also to provide a tunnel kiln firing system for foamed ceramic lightweight plates to achieve fast firing at low temperature. The foamed ceramic lightweight plates obtained by firing are on the same section, from top to bottom. There is no difference in lower stomata, and the uniformity of air bubbles is high.

In order to solve the above technical problems, the present invention provides a tunnel kiln firing system of foamed ceramic light board, including: a feeding line for distributing raw materials on a kiln car; a tunnel kiln for expanding foam The ceramic body is fired; the cutting line is used to unload the foamed ceramic light board;

Wherein, the kiln car includes a bracket, and a box bowl is provided on the bracket. The box bowl includes a cushion plate, a surrounding plate, and a high-temperature resistant paper. The board is provided with the high temperature resistant paper;

The loading line includes:

Cleaning unit for cleaning pads and enclosures;

A first laying unit for laying a heat-resistant paper on a mat;

A siding installation unit for siding a siding on a shim;

A second laying unit for laying heat-resistant paper on the surrounding board;

A cloth distribution unit for cloth distribution on a cushion board, a surrounding board and a box formed of high temperature resistant paper;

Conveying unit for conveying the kiln car after distribution to the tunnel kiln.

As an improvement to the above solution, the blanking line includes:

A first unloading unit for unloading the shroud;

A second unloading unit for unloading foamed ceramic lightweight panels.

As an improvement to the foregoing solution, the first laying unit includes a bottom-laying paper machine, the surrounding board laying unit includes a robot, and the second laying unit includes a side-laying paper machine;

The first laying unit, the erection unit and the second laying unit are connected in sequence;

The surrounding board erection unit is provided corresponding to the first unloading unit, and the robot hand transfers the surrounding board unloaded by the first unloading unit to the surrounding board erection unit.

As an improvement of the above scheme, the first laying unit, the erection unit and the second laying unit are further provided with a finishing machine, the finishing machine includes a lifting robot arm and a snapping member, and the snapping member is opposite to the pad The boards and boards are aligned.

As an improvement of the above solution, the cleaning unit is a cleaning machine, the cleaning machine includes a brush, a driving mechanism, and a vacuum cleaning system, and the driving mechanism drives the brush to roll.

As an improvement of the above solution, the pad is a mullite pad, a silicon carbide pad or a cordierite pad;

The enclosure is a mullite enclosure, a silicon carbide enclosure or a cordierite enclosure;

The high temperature resistant paper is aluminum silicate fiber paper.

As an improvement of the above solution, the bracket is provided with at least three layers of box bowls, and the green body in the box bowl is multi-layered and fired in a tunnel kiln to form a foamed ceramic light board.

As an improvement to the above scheme, the foamed ceramic lightweight board is mainly made of the following weight percentages of raw materials:

Tile polishing residue is 70-96%, clay is 0-10%, feldspar is 0-20%, foaming agent is 0.01-0.6%, stabilizer is 0.1-4%.

As an improvement to the above scheme, the foamed ceramic lightweight board is mainly made of the following weight percentages of raw materials:

Tile polishing residue is 75-95%, clay is 0.1-10%, feldspar is 0.1-20%, foaming agent is 0.1-0.4%, and stabilizer is 0.1-3%.

As an improvement of the above scheme, the clay is one or more of black mud, kaolin, urban sludge, and sea mud;

The foaming agent is silicon carbide or a reclaimed polishing head. The main components of the reclaimed polishing head include silicon carbide and a resin.

The implementation of the present invention has the following beneficial effects:

1. The tunnel kiln firing system of the foamed ceramic light board of the present invention comprises a feeding line, a tunnel kiln and a feeding line, wherein the feeding line is used for distributing raw materials on a kiln car to form a green body; The tunnel kiln is used for firing the green body to form a foamed ceramic light board; the cutting line is used for unloading the foamed ceramic light board. After the kiln car comes out of the kiln tail of the tunnel kiln, it enters the unloading line, first unloads the siding, then unloads the foamed ceramic light board, and the unloading line is finished. Enter the feeding line, clean the padding board in turn, lay high temperature resistant paper on the padding board, place the upper board, lay high temperature resistant paper and cloth on the board, and finally transfer the kiln car covered with material to the kiln. The invention adopts the above production system, which can avoid single-layer stacking, realize multi-layer stacking, reduce manual labor, realize fully automated production, and greatly improve production efficiency.

2. The hoisting board erection unit of the loading line is set corresponding to the first unloading unit of the feeding line, and the robot moves the hoisting board unloaded by the first unloading unit to the hoisting plate erection unit to reduce the moving distance between loading and unloading. , Easy to operate, making the layout of the production line more reasonable, reducing production space.

3. The present invention adopts a tunnel kiln stacking method to achieve low-temperature fast firing, which greatly reduces the oxidation reaction stage time of the formula. Even if the firing cycle is shortened, the ceramic plate can be burned through, which increases the yield and reduces the unit product. Energy consumption. In addition, the present invention adopts a multi-layer firing method, and the green body is not affected by multilayer superposition, and can also be burned through at low temperature and in a short time to ensure product quality, greatly improve production efficiency, and reduce the occupation of the tunnel kiln. Ground space.

4. The raw materials of the foamed ceramic light board include 70-96% of tile polishing waste, 0.01-0.6% of foaming agent, and 0.1-4% of stabilizer, which increases the amount of tile polishing waste added. The maximum amount can be up to 96%, and the amount of foaming agent can be reduced to 0.01-0.6%. On this basis, the addition of 0.1-4% manganese dioxide stabilizer can improve the uniformity of air bubbles. Even in the same section, there is no difference in the pores from top to bottom, which makes the overall uniformity of the product good.

Finally, the foamed ceramic light board made by the above-mentioned fire-stacking system and fire-stacking method has excellent quality, compressive strength ≥4.5Mpa, bulk density: 200-1100Kg / m ³ , thermal conductivity: ≤0.15W / m ℃, Burning level: A1 level, water absorption: <2%, radioactivity index: I _Ra ≤ 1.0, I _r ≤ 1.0.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a cross-sectional view of a prior art foamed ceramic lightweight board;

2 is a schematic view of a tunnel kiln firing system of the foamed ceramic light board of the present invention;

Figure 3 is a front view of a kiln car of the present invention;

Figure 4 is a left side view of the kiln car of the present invention;

Fig. 5 is a plan view of a kiln car according to the present invention.

detailed description

To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings.

Referring to FIG. 2, the present invention provides a tunnel kiln firing system for a foamed ceramic light board, including: a feeding line 1 for distributing raw materials on a kiln car 4; a tunnel kiln 2 for foaming The ceramic body is fired; the cutting line 3 is used for unloading the foamed ceramic light board.

Referring to Figs. 3-5, the kiln car 4 includes a bracket 41 provided with a box bowl 42 including a shim plate 43, a surrounding plate 44 and a high temperature resistant paper 45. Laying on the periphery of the shim plate 43, the high temperature resistant paper 45 is provided on the shim plate 43 and the surrounding plate 44.

Preferably, the bracket 41 is provided with at least three layers of box bowls 42, and the green body in the box bowl 42 is multi-layered and fired in the tunnel kiln 2 to form a foamed ceramic light board. The invention adopts the multi-layer firing method of the tunnel kiln to realize low-temperature fast firing, which greatly reduces the oxidation reaction stage time of the formula. Even if the firing cycle is shortened, the ceramic plate can be burned through, the yield is increased, and the energy per unit product is reduced Consuming. In addition, the present invention adopts a multi-layer firing method, and the green body is not affected by multilayer superposition, and can also be burned through at low temperature and in a short time to ensure product quality, greatly improve production efficiency, and reduce the occupation of the tunnel kiln. Ground space.

It should be noted that the number of layers of the box bowl 42 of the kiln car can be set according to the actual situation, for example, 4, 5, 6, 7, 8, 9, and 10 layers, and its implementation is not limited to the invention. Give examples.

The backing plate 43 is preferably a mullite backing plate, a silicon carbide backing plate or a cordierite backing plate, and has the advantages of small thermal expansion coefficient, good thermal shock stability, not being easily deformed and cracked, and long service life.

The enclosure 44 is preferably a mullite enclosure, a silicon carbide enclosure or a cordierite enclosure, which has the advantages of small thermal expansion coefficient, good thermal shock stability, not being easily deformed and cracked, and long service life.

The high temperature resistant paper 45 refers to a paper that can withstand a high temperature of 1220 ° C, preferably an aluminum silicate fiber paper. The aluminum silicate fiber paper is made of gold stone aluminum silicate ceramic fiber cotton as a main raw material by a wet forming process. It has ideal heat insulation, heat preservation, sealing, electrical insulation, sound absorption, and filtering performance in the environment. It has low thermal capacity, low thermal conductivity, excellent electrical insulation properties, excellent machining performance, high strength, tear resistance and high flexibility.

The feeding line 1 includes:

A cleaning unit 11 for cleaning pads and enclosures;

A first laying unit 12 for laying a heat-resistant paper on a mat;

A shroud erection unit 13 for laying a shroud on the pad;

A second laying unit 14 for laying a heat-resistant paper on the surrounding board;

A cloth distribution unit 15 for cloth distribution on a cushion plate, a surrounding plate and a box formed of high-temperature paper;

The conveying unit 16 for conveying the kiln car after the distribution to the tunnel kiln.

The blanking line 3 includes:

A first unloading unit 31 for unloading a fence;

A second unloading unit 32 for unloading the foamed ceramic lightweight board.

Specifically, the cleaning unit 11 is a cleaning machine, which includes a brush, a driving mechanism, and a vacuum cleaning system, and the driving mechanism drives the brush to roll. The invention cleans and collects the surface of the backing plate and the surrounding plate by using a rolling brush and a vacuum cleaning system.

Here, the first laying unit 12 includes a bottom paper machine, the surrounding board erection unit 13 includes a manipulator 17, the second laying unit 14 includes a side paper machine, and the first laying unit 12 and the surrounding board The erection unit 13 and the second laying unit 14 are sequentially connected, and the processing of laying high-temperature-resistant paper on the backing board, the upper surrounding board, and laying the high-temperature-resistant paper on the surrounding board are sequentially performed.

The shroud erection unit 13 is provided corresponding to the first unloading unit 31, and the manipulator 17 moves the shroud slab of the first unloading unit 31 to the corresponding layer of the shroud erection unit 13, reducing the interval between loading and unloading. The moving distance and convenient operation make the layout of the production line more reasonable and reduce the production space.

The first laying unit 12, the shroud erection unit 13, and the second laying unit 14 are further provided with a finishing machine, which includes a lifting robot arm and a snapping component, and the snapping component is pressed against the pad and the surrounding plate. Dimensioning cylinders are set around the external dimensions. After the kiln car reaches the aligning station, the lifting robotic arm drives the aligning components to descend to the specified position, and aligns all around the boron board. After the completion of the aligning, the elevator drives the aligning components to rise. The kiln car walked to the next station.

It should be noted that, for the cleaning machine selected by the cleaning unit 11 of the present invention, a commercially available cleaning machine can be selected; and the system selected by the first laying unit 12 is a bottom paper machine and the side laying paper machine by the second laying unit 14 is selected here. , Choose a commercially available paper machine.

With reference to Figure 2, the working process of the present invention is as follows:

First, enter the loading line 1, and then clean the padding board in sequence by the cleaning unit 11, lay high-temperature paper on the padding board in the first laying unit 12, and place the boarding board in the boarding unit 13 and the second laying unit. 14 Lay high-temperature-resistant paper on the surrounding board, distribute it through the distribution unit 15, and finally transfer the kiln car covered with material to the kiln through the conveying unit 16.

Then, the covered kiln car is fired in the tunnel kiln 2 to obtain a foamed ceramic lightweight board finished product after firing.

Finally, the kiln car comes out of the kiln tail of the tunnel kiln 2 and enters the unloading line 3. First, the first unloading unit 31 is used to unload the enclosure board, and then the second unloading unit 32 is used to unload the foamed ceramic light board. Operation is complete.

Repeat this cycle.

Further, the foamed ceramic lightweight board is mainly made of the following weight percentages of raw materials: tile polishing residue 70-96%, clay 0-10%, feldspar 0-20%, foaming agent 0.01-0.6%, Stabilizer 0.1-4%.

Preferably, the foamed ceramic light board is mainly made of the following weight percentages of raw materials: 75-95% of tile polishing waste, 0.1-10% of clay, 0.1-20% of feldspar, and 0.1-0.4% of foaming agent. Stabilizer 0.1-3%.

The invention increases the amount of tile polishing waste residue and reduces the amount of foaming agent. On this basis, the addition of 0.1-4% manganese dioxide stabilizer can improve the uniformity of air bubbles. Even in the same section, there is no difference in the pores from top to bottom, which makes the overall uniformity of the product good. The pores in the entire cross section of the foamed ceramic light board are round holes, and the pore sizes from top to bottom are basically the same, and the uniformity of the pores after firing is good.

Manganese dioxide is an amphoteric oxide, which is a very stable black powdery solid at room temperature. It appears oxidizing when it encounters a reducing agent, and it appears reducing when it encounters a strong oxidant. The prior art generally uses manganese dioxide as an oxidant or catalyst. In the present invention, manganese dioxide is used as a bubble stabilizer. After reacting with the formula, manganese dioxide can make the walls of the stomata firm, and at the same time, make the formula more homogeneous, even in the same section, from top to bottom. There is no difference in the pores, which prevents the pores from being squashed, improves the uniformity of the bubbles, and the overall uniformity of the product is good.

The foaming agent is silicon carbide or a reclaimed polishing head. The main components of the reclaimed polishing head include silicon carbide and a resin. Silicon carbide is a foaming material.The presence of this material makes it not shrink like ordinary ceramics during firing, but expands, thereby making the lightweight and high-strength ceramic plate for construction smaller than traditional ceramics in size and thickness. Plates are easier to make large and thick. The polishing grinder recycling material is added as the base material because the components of the polishing grinder are silicon carbide and resin, and silicon carbide is the foaming agent added in the formulation of the invention, so the invention can reduce the amount of foaming agent added. To 0.01-0.6%, reduce the amount of foaming agent and reduce costs.

At the same time, the introduction of 70-96% of tile polishing residue in the formula is not only conducive to environmental protection recycling, but also makes the foamed ceramic light board sintered with a solid honeycomb-like hole structure, which is green, environmentally friendly, lightweight, Convenient construction, lightening building load, etc. The added amount of ceramic tile polishing waste of the present invention is much larger than the existing foamed ceramic plate, which reduces the cost and strengthens the recycling of solid waste.

The clay is one or more of black mud, kaolin, urban sludge, and sea mud. By adding clay and feldspar to the raw materials of the present invention, the silicon, aluminum, potassium, and sodium component ratios in the base formulation can be adjusted to make the foamed brick wall harder and stronger, and further recycle the waste solids.

The present invention adopts a tunnel kiln multi-layer firing method, wherein the firing method includes:

(1) The temperature is raised to T ₁ , T ₁ is 800-900 ° C., and the temperature is maintained at T _{1 for} 0-30 min. Among them, the temperature rising rate from 0 ° C. to 400 ° C. is 10-20 ° C./min, and from 400 ° C. to The heating rate of T ₁ is 1-8 ℃ / min;

(2) The temperature is raised to T ₂ , T ₂ is 1150-1220 ° C., and the temperature is maintained at the highest temperature for 0-60 min. Among them, the temperature rising rate from T ₁ to T ₂ is 1-8 ° C./min;

(3) Slow cooling, the cooling rate from T ₂ to 600 ° C is 3-9 ° C / min, and the cooling rate from 600 ° C to 50 ° C is 1-4 ° C / min.

Preferably, the firing method includes:

(1) The temperature is increased to 800-900 ° C, and the temperature is maintained at 800-900 ° C for 0-30min. Among them, the temperature increase rate from 0 ° C to 400 ° C is 15 ° C / min, and the temperature increase rate from 400 ° C to 800 ° C is 5 ℃ / min;

(2) The temperature is raised to 1150-1220 ° C, and the temperature is maintained at the highest temperature for 0-60min. Among them, the temperature increase rate from 800 ° C to 1150 ° C is 5 ° C / min;

(3) Slow cooling, the cooling rate from 1150 ° C to 600 ° C is 6 ° C / min, and the cooling rate from 600 ° C to 50 ° C is 2 ° C / min.

The technical inspection of the foamed ceramic light board obtained by the present invention has the following results:

project	this invention
Compressive strength	≥4.5Mpa
Bulk Density	200-1100Kg / m 3
Thermal Conductivity	≤0.15W / m ℃
Burning level	A1 level
Water absorption	<2%

Radioactive index

I Ra ≤1.0, I r ≤1.0

Therefore, on the basis of solving the pores in the foamed ceramic light board, the invention also ensures that it has good compressive strength, good thermal insulation effect, good flame retardancy, and low radioactivity index.

The present invention is further explained in the following specific examples.

Example 1

(1) Formula: 95.5% ceramic tile polishing residue, 0.5% foaming agent, 4% manganese dioxide stabilizer.

(2) Preparation method:

The raw materials are mixed according to the ratio and ball milled to obtain powder;

The powder is distributed on the kiln car through the feeding line, and then the kiln car is pushed into the tunnel kiln for three-layer firing to obtain a foamed ceramic lightweight plate. The firing method is as follows: (a) The temperature is raised to 800 ° C. , And maintained at 800 ° C for 20min, in which, the temperature increase rate from 0 ° C to 400 ° C is 10 ° C / min, and the temperature increase rate from 400 ° C to 800 ° C is 3 ° C / min; (b) the temperature is increased to 1150 ° C, The temperature is maintained at the highest temperature for 40 minutes. Among them, the temperature increase rate from 800 ° C to 1150 ° C is 3 ° C / min. (C) Slow temperature decrease, the temperature decrease rate from 1150 ° C to 600 ° C is 3 ° C / min, from 600 ° C. The rate of temperature decrease to 50 ℃ is 1 ℃ / min;

Finally, the foamed ceramic light board is unloaded through a cutting line.

Example 2

(1) Formula: 90% ceramic tile polishing residue, 1% clay, feldspar 8.8%, foaming agent 0.1%, stabilizer 0.1%.

(2) Preparation method:

The raw materials are mixed according to the ratio and ball milled to obtain powder;

The powder is distributed on the kiln car through the feeding line, and then the kiln car is pushed into the tunnel kiln for three-layer firing to obtain a foamed ceramic light board. The firing method is as follows: (a) The temperature is raised to 820 ° C. , And maintained at 820 ° C for 15 minutes, in which the temperature increase rate from 0 ° C to 400 ° C is 15 ° C / min, and the temperature increase rate from 400 ° C to 820 ° C is 5 ° C / min; (b) the temperature is increased to 1170 ° C, The temperature is maintained at the highest temperature for 30 minutes. Among them, the heating rate from 820 ° C to 1170 ° C is 4 ° C / min; (c) Slow cooling, the cooling rate from 1170 ° C to 600 ° C is 4 ° C / min, from 600 ° C The rate of cooling down to 50 ℃ is 2 ℃ / min;

Finally, the foamed ceramic light board is unloaded through a cutting line.

Example 3

(1) Formula: 92% of tile polishing waste, 5% of clay, 2% of feldspar, 0.2% of foaming agent, 0.8% of stabilizer.

(2) Preparation method:

The raw materials are mixed according to the ratio and ball milled to obtain powder;

The powder is distributed on the kiln car through the feeding line, and then the kiln car is pushed into the tunnel kiln for three-layer firing to obtain a foamed ceramic light board. The firing method is as follows: (a) The temperature is raised to 830 ° C. , And maintained at 830 ° C for 25 minutes, in which, the temperature increase rate from 0 ° C to 400 ° C is 15 ° C / min, and the temperature increase rate from 400 ° C to 830 ° C is 5 ° C / min; (b) the temperature is increased to 1180 ° C, And the temperature is maintained at the highest temperature for 0-60min, among which, the temperature increase rate from 830 ° C to 1180 ° C is 5 ° C / min; (c) slowly cool down, the temperature decrease rate from 1180 ° C to 600 ° C is 5 ° C / min. The cooling rate from 600 ℃ to 50 ℃ is 2 ℃ / min;

Finally, the foamed ceramic light board is unloaded through a cutting line.

Example 4

(1) Formula: 88% of tile polishing waste, 2% of clay, 8% of feldspar, 0.1% of foaming agent, and 1.9% of stabilizer.

(2) Preparation method:

The powder is distributed on the kiln car through the feeding line, and then the kiln car is pushed into the tunnel kiln for three-layer firing to obtain a foamed ceramic light board. The firing method is as follows: (a) The temperature is raised to 850 ° C. , And maintained at 850 ° C for 30 minutes, in which the temperature increase rate from 0 ° C to 400 ° C is 16 ° C / min, and the temperature increase rate from 400 ° C to 850 ° C is 5 ° C / min; (b) the temperature is increased to 1200 ° C, The temperature is maintained at the highest temperature for 50 minutes, among which, the heating rate from 850 ° C to 1200 ° C is 5 ° C / min; (c) Slow cooling, the cooling rate from 1200 ° C to 600 ° C is 6 ° C / min, from 600 ° C The rate of cooling down to 50 ℃ is 2 ℃ / min;

Finally, the foamed ceramic light board is unloaded through a cutting line.

Example 5

(1) Formula: 80% of tile polishing waste, 10% of clay, 7.7% of feldspar, 0.3% of foaming agent, and 2% of stabilizer.

(2) Preparation method:

The raw materials are mixed according to the ratio and ball milled to obtain powder;

The powder is distributed on the kiln car through the feeding line, and then the kiln car is pushed into the tunnel kiln for three-layer firing to obtain a foamed ceramic lightweight board. The firing method is as follows: (a) The temperature is raised to 860 ° C. And keep it at 860 ℃ for 10min, among which, the temperature increasing rate from 0 ℃ to 400 ℃ is 17 ℃ / min, and the temperature increasing rate from 400 ℃ to 860 ℃ is 6 ℃ / min; (b) the temperature is increased to 1210 ℃, The temperature is maintained at the highest temperature for 30 minutes. Among them, the temperature rising rate from 860 ° C to 1210 ° C is 5 ° C / min; (c) Slow cooling, the cooling rate from 1210 ° C to 600 ° C is 6 ° C / min, from 600 ° C. The rate of cooling down to 50 ℃ is 2 ℃ / min;

Finally, the foamed ceramic light board is unloaded through a cutting line.

Example 6

(1) Formula: 75% of tile polishing waste, 1.6% of clay, 20% of feldspar, 0.4% of foaming agent, and 3% of stabilizer.

(2) Preparation method:

The raw materials are mixed according to the ratio and ball milled to obtain powder;

The powder is distributed on the kiln car through the feeding line, and then the kiln car is pushed into the tunnel kiln for three-layer firing treatment to obtain a foamed ceramic lightweight plate. The firing method is as follows: (a) The temperature is raised to 900 ° C. , And maintained at 900 ° C for 30 minutes, wherein the temperature increase rate from 0 ° C to 400 ° C is 20 ° C / min, and the temperature increase rate from 400 ° C to 900 ° C is 8 ° C / min; (b) the temperature is increased to 1220 ° C, The temperature is maintained at the highest temperature for 60 minutes, among which, the heating rate from 900 ° C to 1220 ° C is 8 ° C / min; (c) Slow cooling, the cooling rate from 1220 ° C to 600 ° C is 9 ° C / min, from 600 ° C The rate of temperature decrease to 50 ℃ is 4 ℃ / min;

Finally, the foamed ceramic light board is unloaded through a cutting line.

The technical inspection of the foamed ceramic lightweight plate obtained in Examples 1-6 is as follows:

Finally, it should be explained that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that Modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.

Claims (10)

1. A tunnel kiln firing system for a foamed ceramic lightweight plate, which is characterized by comprising: a feeding line for distributing raw materials on a kiln car; and a tunnel kiln for transforming a foamed ceramic lightweight plate blank Firing; and a cutting line for unloading the foamed ceramic light board;

   Wherein, the kiln car includes a bracket, and a box bowl is provided on the bracket. The box bowl includes a cushion plate, a surrounding plate, and a high-temperature resistant paper. The board is provided with the high temperature resistant paper;

   The loading line includes:

   Cleaning unit for cleaning pads and enclosures;

   A first laying unit for laying a heat-resistant paper on a mat;

   A siding installation unit for siding a siding on a shim;

   A second laying unit for laying heat-resistant paper on the surrounding board;

   A cloth distribution unit for cloth distribution on a cushion board, a surrounding board and a box formed of high temperature resistant paper;

   Conveying unit for conveying the kiln car after distribution to the tunnel kiln.
2. The tunnel kiln firing system for a foamed ceramic light board according to claim 1, wherein the cutting line comprises:

   A first unloading unit for unloading the shroud;

   A second unloading unit for unloading foamed ceramic lightweight panels.
3. The tunnel kiln firing system for a foamed ceramic lightweight board according to claim 1, wherein the first laying unit includes a bottom-laying paper machine, the surrounding board laying unit includes a robot, and the second laying unit The unit includes a side-laying paper machine;

   The first laying unit, the erection unit and the second laying unit are connected in sequence;

   The surrounding board erection unit is provided corresponding to the first unloading unit, and the robot hand transfers the surrounding board unloaded by the first unloading unit to the surrounding board erection unit.
4. The tunnel kiln firing system for a foamed ceramic light board according to claim 3, wherein the first laying unit, the cladding unit and the second laying unit are further provided with a finishing machine, wherein The whole machine includes a lifting robot arm and a aligning component, which aligns and aligns the pad and the surrounding plate.
5. The kiln firing system for a foamed ceramic light board according to claim 1, wherein the cleaning unit is a cleaning machine, the cleaning machine comprising a brush, a driving mechanism, and a vacuum cleaning system, wherein The driving mechanism drives the brush to roll.
6. The tunnel kiln firing system for a foamed ceramic light board according to any one of claims 1 to 5, wherein the pad is a mullite pad, a silicon carbide pad or a cordierite pad;

   The enclosure is a mullite enclosure, a silicon carbide enclosure or a cordierite enclosure;

   The high temperature resistant paper is aluminum silicate fiber paper.
7. The tunnel kiln firing system for a foamed ceramic light board according to any one of claims 1 to 5, wherein the bracket is provided with at least three layers of box bowls, and the blank in the box bowl is in the tunnel kiln. Multi-layer firing is performed inside to form a foamed ceramic lightweight board.
8. The tunnel kiln firing system for a foamed ceramic light board according to claim 7, wherein the foamed ceramic light board is mainly made of the following weight percentages of raw materials:

   Tile polishing residue is 70-96%, clay is 0-10%, feldspar is 0-20%, foaming agent is 0.01-0.6%, stabilizer is 0.1-4%.
9. The tunnel kiln firing system for a foamed ceramic light board according to claim 8, wherein the foamed ceramic light board is mainly made of the following weight percentages of raw materials:

   Tile polishing residue is 75-95%, clay is 0.1-10%, feldspar is 0.1-20%, foaming agent is 0.1-0.4%, and stabilizer is 0.1-3%.
10. The tunnel kiln firing system for a foamed ceramic light board according to claim 8, wherein the clay is one or more of black mud, kaolin, urban sludge, and sea mud;

    The foaming agent is silicon carbide or a reclaimed polishing head. The main components of the reclaimed polishing head include silicon carbide and a resin.

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