WO2020000590A1 - Rolling kiln firing method for foamed ceramic lightweight plate material - Google Patents

Abstract

A rolling kiln firing method for a foamed ceramic lightweight plate material, comprising: (1) heating to T₁, T₁ being 800-900 °C, holding at T₁ for 0-30 min, where the heating rate for heating from 0 °C to 400 °C is 10-20 °C/min, and the heating rate for heating from 400 °C to T₁ is 1-8 °C/min; (2) heating to T₂, T₂ being 1150-1220 °C, and holding at highest temperature for 0-60 min, where the heating rate for heating from T₁ to T₂ is 1-8 °C/min; (3) cooling slowly, the cooling rate for cooling from T₂ to 600 °C being 3-9 °C/min, and the cooling rate for cooling from 600 °C to 50 °C being 1-4 °C/min.

Description

Roller kiln firing method of foamed ceramic light board Technical field

The invention relates to the technical field of ceramic plates, in particular to a roller kiln firing method for foamed ceramic lightweight 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, 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 formulation 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 and 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 the tunnel kiln is about 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.

Summary of the invention

The technical problem to be solved by the present invention is to provide a roller kiln firing method for foamed ceramic lightweight sheet material to achieve low-temperature fast firing. The foamed ceramic lightweight sheet material obtained by firing is on the same cross 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 roller kiln firing method for foamed ceramic light board, including:

(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.

As an improvement to the above scheme, the firing method of the roller kiln 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 heating rate from 0 ° C. to 400 ° C. is 13-17 ° C./min, and from 400 ° C. to The heating rate of T ₁ is 4-6 ℃ / 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 4-6 ° C./min;

(3) Slow cooling, the cooling rate from T ₂ to 600 ° C is 5-7 ° C / min, and the cooling rate from 600 ° C to 50 ° C is 1-3 ° C / min.

As an improvement of the above scheme, the firing method of the roller kiln includes:

(1) The temperature is increased 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 increase rate from 0 ° C. to 400 ° C. is 15 ° C./min, and from 400 ° C. to T ₁ The heating rate is 5 ℃ / min;

(2) The temperature is increased 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 5 ° C./min;

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

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 70-96%, clay 0-10%, feldspar 0-20%, foaming agent 0.01-0.6%, stabilizer 0.1-4%;

The stabilizer is manganese dioxide.

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.

As an improvement of the foregoing solution, the foaming agent is silicon carbide or a polishing head recycled material, and the main components of the polishing head recycled material include silicon carbide and a resin.

As an improvement to the above solution, the roller kiln firing includes:

A box bowl is used on the roller kiln. The box bowl is an integrated box bowl or a combined box bowl. It is manually or mechanically clothed and then fired at 1150-1220 ° C.

As an improvement to the above solution, the assembled box bowl includes a support, a support plate, a surrounding plate and high-temperature paper, the supporting plate is laid on the support, the surrounding plate is erected around the supporting plate, and the supporting plate and the surrounding plate The boards are all provided with the high-temperature paper.

As an improvement of the foregoing solution, the stent is a SiC stent;

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 paper is aluminum silicate fiber paper.

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

The invention designs a new roller kiln firing method for foamed ceramic light board, which realizes fast firing at low temperature, greatly reducing the oxidation reaction stage time of the formula, shortening the firing cycle, increasing the yield, and reducing the unit product. Energy consumption.

The foamed ceramic light board comprises 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, and the maximum amount of tile polishing waste added can be Up to 96%, while reducing the amount of foaming agent added 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 pores from top to bottom, which makes the overall uniformity of the product good.

The foamed ceramic lightweight board prepared by the invention has excellent quality, compressive strength ≥5Mpa, bulk density: 200-1100Kg / m ³ , flexural strength:> 4Mpa, thermal conductivity: ≤0.15W / m ° C, combustion level: A1 grade, 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 roller kiln firing method of a prior art foamed ceramic light board;

2 is a flow chart of a roller kiln firing method of the foamed ceramic light board of the present invention;

FIG. 3 is a flowchart of a method for preparing a foamed ceramic lightweight board 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.

As shown in FIG. 2, the present invention provides a roller kiln firing method of a foamed ceramic light board, including:

S201. Heating up to T ₁ , T ₁ is 800-900 ° C., and holding at T _{1 for} 0-30 min, wherein the heating rate from 0 ° C. to 400 ° C. is 10-20 ° C./min, and from 400 ° C. to T _a heating rate of 1-8 ℃ / min;

S202. 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;

S203. Slowly cool down, 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 roller kiln firing method includes:

S201. Heating up to T ₁ , T ₁ is 800-900 ° C., and holding at T _{1 for} 0-30 min, wherein the heating rate from 0 ° C. to 400 ° C. is 13-17 ° C./min, and from 400 ° C. to T The heating rate of ₁ is 4-6 ℃ / min;

S202. 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 4-6 ° C./min;

S203. Slowly cool down, the cooling rate from T ₂ to 600 ° C is 5-7 ° C / min, and the cooling rate from 600 ° C to 50 ° C is 1-3 ° C / min.

More preferably, the firing method of the roller kiln includes:

S201, warmed to T _1, T ₁ is 800-900 deg.] C, and incubated 0-30min T _1, wherein, heated from 0 ℃ to 400 deg.] C heating rate of 15 ℃ / min, heating from 400 ℃ to T ₁ of Heating rate is 5 ℃ / min;

S202. 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 5 ° C./min;

S203. Slowly cool down, the cooling rate from T ₂ to 600 ° C is 6 ° C / min, and the cooling rate from 600 ° C to 50 ° C is 2 ° C / min.

Compared with the prior art, the firing process of the present invention can achieve rapid low-temperature firing, greatly reducing the oxidation reaction stage time of the formula, shortening the firing cycle, increasing the output, and reducing the energy consumption per unit product. The roller kiln firing method of the foamed ceramic light board adopts the roller kiln firing process, which not only improves the output, but also saves energy, and reduces the energy consumption per unit product by 10-30%.

The foamed ceramic light board is mainly made of the following weight percentages of raw materials: tile polishing waste 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%. Wherein, the stabilizer is manganese dioxide, and the foaming agent is silicon carbide or a polishing head recycled material.

The invention increases the amount of tile polishing waste residue and reduces the amount of foaming agent. On this basis, the addition of 0.1-3% 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. In the roller kiln firing method of foamed ceramic light board, the pores in the entire cross section are round holes, and the size of the pores from the top to the bottom is basically the same.

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. 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 main components of the polishing grinder itself are silicon carbide and resin, and silicon carbide is the foaming agent added in the formulation of the invention, so the invention can add the amount of foaming agent Reduce to 0.1-0.4%, reduce the amount of foaming agent and reduce costs.

At the same time, 75-95% of the tile polishing waste is introduced into the formula, which is not only conducive to environmental protection recycling, but also can make the foamed ceramic light board roll kiln firing method have a solid honeycomb-like hole structure inside. It has the advantages of environmental protection, light weight, convenient construction, and lightened building load. 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.

As a better embodiment of the present invention, the raw materials are added with clay and feldspar, that is, the 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%. Clay is one or more of black mud, kaolin, municipal 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, thereby further strengthening the recycling of solid waste.

Because of adopting a new formula system, the present invention breaks through the limitation that the traditional foamed ceramic plate can only be fired through a tunnel kiln, and can realize ordinary firing through a tunnel kiln or fast firing through a roller kiln.

Specifically, the roller kiln firing includes:

A box bowl is used on the roller kiln. The box bowl is an integrated box bowl or a combined box bowl. It is manually or mechanically clothed and then fired at 1150-1220 ° C. The assembled box comprises a support, a support plate, a surrounding plate, and a high-temperature paper. The supporting plate is laid on the support, the surrounding plate is laid around the supporting plate, and the supporting plate and the surrounding plate are provided with all Mentioned high temperature paper. Preferably, the support is a SiC support; the support plate is a mullite support plate, a silicon carbide support plate, or a cordierite support plate; and the surrounding plate is a mullite support plate, a silicon carbide support plate, or a cordierite support. Board; the high-temperature paper is aluminum silicate fiber paper.

The invention can use a roller kiln to achieve rapid firing (the period is about 12 hours), but the prior art can only use the tunnel kiln for firing (the period is 24-26 hours).

Accordingly, as shown in FIG. 3, the present invention provides a method for preparing a foamed ceramic lightweight board, including:

S101. The raw materials are mixed according to the ratio and ball-milled.

The ball milling powder may be a wet method powder or a dry method powder. The wet milling method includes: adding raw materials with 30-40% water, and putting them into a ball mill for ball milling treatment, ball milling to a 250-mesh sieve and less than 1%, and then powdering through a spray tower to obtain a water content of 5- 10% powder.

S102: distribute the powder to obtain a green body;

S103. The green body is fired through a roller kiln or a tunnel kiln to obtain a semi-finished product.

S104. The semi-product is cut and ground to obtain a finished product.

After firing, the upper and lower surfaces of the green body need to be ground and the edges are cut.

The technical inspection of the foamed ceramic lightweight board of 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 internal pores of the foamed ceramic light board, the invention also guarantees 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 above raw materials are mixed according to the ratio, and they are sent to a ball mill for ball milling treatment, and sieved to a 250 mesh sieve with a screen balance of less than 1%, and then pass through the slurry storage tank and the transfer tank to the spray tower for spray granulation. Pass the material of the cart to the roller kiln for firing. The firing method is as follows:

(a) The temperature is increased to 800 ° C, and the temperature is maintained at 800 ° C for 20 minutes, wherein 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, and the temperature is maintained at the highest temperature for 40 minutes, wherein the temperature increase rate from 800 ° C to 1150 ° C is 3 ° C / min;

(c) Slow cooling, the cooling rate from 1150 ° C to 600 ° C is 3 ° C / min, and the cooling rate from 600 ° C to 50 ° C is 1 ° C / min.

Finally, after cutting and grinding, the finished product is obtained.

Example 2

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

(2) Preparation method:

The above raw materials are mixed according to the ratio, and they are sent to a ball mill for ball milling treatment, and sieved to a 250 mesh sieve with a screen balance of less than 1%, and then pass through the slurry storage tank and the transfer tank to the spray tower for spray granulation to obtain the powder. Pass the material of the cart to the roller kiln for firing. The firing method is as follows:

(a) The temperature is increased to 820 ° C, and the temperature is maintained at 820 ° C for 15 minutes, wherein 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, and the temperature is maintained at the highest temperature for 30 minutes, wherein the temperature increase 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, and the cooling rate from 600 ° C to 50 ° C is 2 ° C / min.

Finally, after cutting and grinding, the finished product is obtained.

Example 3

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

(2) Preparation method:

The above raw materials are mixed according to the ratio, and they are sent to a ball mill for ball milling treatment, and sieved to a 250 mesh sieve with a screen balance of less than 1%, and then pass through the slurry storage tank and the transfer tank to the spray tower for spray granulation to obtain the powder. Pass the material of the cart to the roller kiln for firing. The firing method is as follows:

(a) The temperature is increased to 830 ° C, and the temperature is maintained at 830 ° C for 25 minutes, wherein 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 raised to 1180 ° C, and the temperature is maintained at the highest temperature for 0-60min, wherein the temperature increase rate from 830 ° C to 1180 ° C is 5 ° C / min;

(c) Slow cooling, the cooling rate from 1180 ° C to 600 ° C is 5 ° C / min, and the cooling rate from 600 ° C to 50 ° C is 2 ° C / min.

Finally, after cutting and grinding, the finished product is obtained.

Example 4

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

(2) Preparation method:

The above raw materials are mixed according to the ratio, and they are sent to a ball mill for ball milling treatment, and sieved to a 250 mesh sieve with a screen balance of less than 1%, and then pass through the slurry storage tank and the transfer tank to the spray tower for spray granulation. Pass the material of the cart to the roller kiln for firing. The firing method is as follows:

(a) The temperature is increased to 850 ° C, and the temperature is maintained at 850 ° C for 30 minutes, wherein 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, and the temperature is maintained at the highest temperature for 50 minutes, wherein the temperature increase 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, and the cooling rate from 600 ° C to 50 ° C is 2 ° C / min.

Finally, after cutting and grinding, the finished product is obtained.

Example 5

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

(2) Preparation method:

The above raw materials are mixed according to the ratio, and they are sent to a ball mill for ball milling treatment, and sieved to a 250 mesh sieve with a screen balance of less than 1%, and then pass through the slurry storage tank and the transfer tank to the spray tower for spray granulation to obtain the powder. Pass the material of the cart to the roller kiln for firing. The firing method is as follows:

(a) The temperature is increased to 860 ° C, and the temperature is maintained at 860 ° C for 10 minutes, wherein the temperature increase rate from 0 ° C to 400 ° C is 17 ° C / min, and the temperature increase rate from 400 ° C to 860 ° C is 6 ° C / min;

(b) The temperature is increased to 1210 ° C, and the temperature is maintained at the highest temperature for 30 minutes, wherein the temperature increase 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, and the cooling rate from 600 ° C to 50 ° C is 2 ° C / min.

Finally, after cutting and grinding, the finished product is obtained.

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 above raw materials are mixed according to the ratio, and they are sent to a ball mill for ball milling treatment, and sieved to a 250 mesh sieve with a screen balance of less than 1%, and then pass through the slurry storage tank and the transfer tank to the spray tower for spray granulation to obtain the powder. Pass the material of the trolley to the tunnel kiln for firing. The firing method is as follows:

(a) The temperature is increased to 900 ° C, and the temperature is 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 raised to 1220 ° C, and the temperature is maintained at the highest temperature for 60 minutes, wherein the temperature increase 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, and the cooling rate from 600 ° C to 50 ° C is 4 ° C / min.

Finally, after cutting and grinding, the finished product is obtained.

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 roller kiln firing method for a foamed ceramic light board is characterized in that it 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.
2. The roller kiln firing method for a foamed ceramic light board according to claim 1, comprising:

   (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 heating rate from 0 ° C. to 400 ° C. is 13-17 ° C./min, and from 400 ° C. to The heating rate of T ₁ is 4-6 ℃ / 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 4-6 ° C./min;

   (3) Slow cooling, the cooling rate from T ₂ to 600 ° C is 5-7 ° C / min, and the cooling rate from 600 ° C to 50 ° C is 1-3 ° C / min.
3. The roller kiln firing method for a foamed ceramic lightweight board according to claim 2, further comprising:

   (1) The temperature is increased 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 increase rate from 0 ° C. to 400 ° C. is 15 ° C./min, and from 400 ° C. to T ₁ The heating rate is 5 ℃ / min;

   (2) The temperature is increased 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 5 ° C./min;

   (3) Slow cooling, the cooling rate from T ₂ to 600 ° C is 6 ° C / min, and the cooling rate from 600 ° C to 50 ° C is 2 ° C / min.
4. The roller kiln firing method for a foamed ceramic lightweight sheet according to claim 1, wherein the foamed ceramic lightweight sheet 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%;

   The stabilizer is manganese dioxide.
5. The roller kiln firing method for a foamed ceramic lightweight board according to claim 4, wherein 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%.
6. The method for sintering a foamed ceramic light board according to claim 4 or 5, wherein the clay is one or more of black mud, kaolin, urban sludge, and sea mud.
7. The method according to claim 4 or 5, wherein the foaming agent is silicon carbide or a polishing head recycled material. The main ingredients include silicon carbide and resin.
8. The method of sintering a roller kiln for a foamed ceramic lightweight board according to claim 1, wherein the sintering of the roller kiln comprises:

   A box bowl is used on the roller kiln. The box bowl is an integrated box bowl or a combined box bowl. It is manually or mechanically clothed and then fired at 1150-1220 ° C.
9. The roller kiln firing method for a foamed ceramic light board according to claim 8, wherein the assembled box comprises a support, a support plate, a surrounding plate, and a high-temperature paper, and the support plate is laid on the support In the above, the surrounding board is erected around the supporting board, and both the supporting board and the supporting board are provided with the high-temperature paper.
10. The method according to claim 9, wherein the support is a SiC support;

    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 paper is aluminum silicate fiber paper.

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