CN115124364A - Light high-strength ceramsite based on solid waste and preparation method thereof - Google Patents
Light high-strength ceramsite based on solid waste and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a light-weight high-strength ceramsite based on solid waste and a preparation method thereof, relating to the technical field of artificial light-weight materials. Compared with the prior art, the method can prepare the ceramsite with light weight and high strength by adopting the single solid waste powder, does not need a complex component design process, radically solves the problems that the pore structure is difficult to regulate and control and the raw material ratio is complex when the ceramsite is prepared by the prior art, has simpler process flow and low cost, and is more suitable for industrial production and application.
Description
Technical Field
The invention relates to the technical field of artificial light materials, in particular to light high-strength ceramsite based on solid waste and a preparation method thereof.
Background
At present, the preparation process of the light high-strength ceramsite mainly adjusts the gas production reaction and the viscosity of a liquid phase in the ceramsite in a high-temperature sintering stage through component design and sintering system control, and binds bubbles by using the liquid phase with proper viscosity, so that the lightweight ceramsite with higher strength is prepared. The existing ceramsite preparation process has the characteristics of complex component design and strict requirements on a high-temperature heat treatment system, and the prepared ceramsite has the problems of uneven pore shape, size and distribution, more cracks, high water absorption rate, difficulty in light weight and high strength and the like.
In chinese patent document CN111333404A, foam is prepared by a foaming method, and then the foam is mixed with phosphorus tailings, a foam stabilizer, cement, etc. to form a ball, and the ball is air-dried to obtain a phosphorus tailings multi-closed-cell matrix. And then, mixing the multi-closed-pore matrix with sludge, a cosolvent and the like to prepare a ceramsite raw material, and performing high-temperature heat treatment to prepare the light ceramsite. Chinese patent document CN102936127A uses carboxymethyl cellulose or surface-modified polystyrene foam particles as pore-forming templates, and utilizes a balling disk to coat ceramsite raw material powder on the pore-forming template material, and the polystyrene foam particles are decomposed and removed in the subsequent high-temperature calcination process, thereby finally obtaining the light hollow ceramsite. Chinese patent CN110759745A introduces pores into ceramsite raw material by introducing cavity pore-forming agents such as polyurethane, polystyrene, polyvinyl chloride, polyethylene, phenolic resin and the like, and prepares light high-strength ceramsite by taking solid wastes such as fly ash, coal gangue, slag and the like as raw materials. In the methods, the size and porosity of the pores of the ceramsite are ensured to meet the design requirements through complex raw material proportioning, so that the preparation process is complex, the industrial production difficulty is high, and fine cracks are easily formed among the pores in the cooling process after high-temperature firing. In addition, the use of polystyrene foam, polyvinyl chloride, polystyrene, phenolic resin, etc. as pore-forming templates may also present the problem of emission of polluting gases during heat treatment.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the preparation method of the light high-strength ceramsite, which takes solid waste as a raw material, has simple preparation process and is easy to industrialize.
Specifically, the process for preparing the light high-strength ceramsite based on the solid waste mainly comprises the following steps:
1) taking solid waste powder with proper granularity and a granular hollow template with the melting point higher than the sintering temperature of the solid waste powder as main raw materials;
2) coating a proper amount of solid waste powder on the surfaces of the granular hollow templates by using an adhesive, and adhering the granular hollow templates coated with the solid waste powder on the surfaces of a proper amount into balls to obtain ceramsite raw material balls;
3) and sintering the dried raw ceramsite spheres at the temperature lower than the melting point of the hollow template, ensuring that the cavity structure of the granular hollow template is not damaged, and cooling along with the furnace after sintering to obtain the light high-strength ceramsite.
In the embodiment of the present invention, the particle size of the solid waste powder is less than 0.088mm, and the particle size of the granular hollow template is 0.1 mm to 3 mm.
In an embodiment of the invention, the binder is an aqueous solution of sugar or molasses.
In an embodiment of the present invention, the solid waste is one of fly ash, shale, waste earthwork, and clay tailings.
In the embodiment of the invention, the granular hollow template is a fly ash floating bead, a mullite hollow sphere or a corundum hollow sphere.
Wherein the mass ratio of the granular hollow template to the solid waste powder is 1: (4-16).
Wherein the concentration of sugar or molasses in the adhesive is (5-15) wt%.
Specifically, in the above step 2): adding a proper amount of granular hollow templates into a disc granulator, spraying a proper amount of adhesive into a mixing disc after starting equipment, uniformly mixing, slowly adding a proper amount of solid waste powder, and additionally spraying a proper amount of adhesive during the period that the solid waste powder is coated on the surfaces of the granular hollow templates; and repeating the operation, and finally preparing the ceramsite raw material ball by alternately adding the granular hollow templates and the solid waste powder in equal proportion in batches.
In step 3): the drying temperature of the ceramsite raw material ball is lower than the melting point temperature of the functional components in the adhesive, the sintering process adopts sectional heating and heat preservation, the highest temperature is 950-1350 ℃, the heat preservation is carried out for 10-90 min at the highest temperature stage, and then the ceramsite raw material ball is cooled to the room temperature along with the furnace.
Finally, the invention also relates to the light high-strength ceramsite prepared by the preparation method.
The granular hollow template with the melting point higher than the sintering temperature of the solid waste powder is used as the pore-forming agent, the granular hollow template can keep the structure of the inner cavity of the granular hollow template from being damaged in the high-temperature sintering stage, and the size and the porosity of pores in the ceramsite can be regulated and controlled only by regulating the size and the adding amount of the granular hollow template. Compared with the prior art, the method can prepare the ceramsite with light weight and high strength by adopting the single solid waste powder, does not need a complex component design process, and fundamentally solves the problems that the pore structure is difficult to regulate and control and the raw material ratio is complex when the ceramsite is prepared by the prior art. Particularly, no fine cracks are seen on the surface and around the pores of the lightweight high-strength ceramsite prepared by the method, the phenomenon of crushing and cracking of the ceramsite cannot occur when the ceramsite is pressed, and the compact and crack-free structural form around the pores is very beneficial to ensuring the low water absorption rate of the ceramsite and the structural stability and compressive strength of the ceramsite in the processes of storage and use. In addition, the process flow adopted by the invention is simpler, the cost is low, and the method is more suitable for industrial production.
Drawings
FIG. 1 is a schematic diagram of a process for preparing light-weight high-strength ceramsite in the example.
FIG. 2 shows the light-weight high-strength fly ash ceramsite prepared in example 1 and its cross-sectional structure.
Detailed Description
In order that those skilled in the art will better understand the difference between the present invention and the prior art, the present invention will be further described with reference to the following specific examples, which are not to be construed as limiting the present invention.
In general, the following embodiments are all based on the same technical concept: the method comprises the steps of taking solid waste powder with a proper particle size and a granular hollow template with a melting point higher than the sintering temperature of the solid waste powder as main raw materials, coating a proper amount of the solid waste powder on the surface of the hollow template by using an adhesive, adhering and aggregating the hollow template coated with the solid waste powder on the surface into a spherical shape to obtain a ceramsite raw material ball, sintering the dried ceramsite raw material ball at the temperature lower than the melting point of the hollow template to ensure that the cavity structure of the hollow template is not damaged, and cooling the ceramsite raw material ball along with a furnace after sintering is finished to finally obtain the light high-strength ceramsite. In the following examples, the particle size of the solid waste powder used was less than 0.09mm, the particle size of the granular hollow template was limited to 0.4mm to 2mm, and the mass ratio of the granular hollow template to the solid waste powder was controlled to 1: (4-16), the difference between the examples is mainly the type of solid waste powder, hollow template, binder, the ratio of the raw material components, and the heat treatment conditions.
Example 1:
firstly, preparing ceramsite raw material balls.
Raw materials: the fly ash (solid waste powder), 20-mesh fly ash floating beads (hollow templates) and a maltose water solution (adhesive) with the concentration of 15wt% are all commercial products, wherein the maltose water solution with the concentration of 15wt% is prepared by taking commercial maltose as a functional component and taking tap water as a solvent.
Equipment: a disc granulator, an electric heating drying box and an experimental electric furnace.
1. And (3) placing the fly ash in an electrothermal drying oven, preserving heat and drying for 24 hours at 110 ℃, then screening the dried fly ash particles by using a 200-mesh screen, and taking the powder under the screen for later use.
2. Controlling the mass ratio of the floating beads to the fly ash to be 1:9, and weighing 200g of floating beads and 1800g of fly ash for later use.
3. Adding 50g of floating beads into a disc granulator, spraying a proper amount of maltose water solution into a mixing disc after starting the equipment, mixing for 2min, slowly adding 450g of fly ash, and additionally spraying a proper amount of maltose solution according to the coating state of the fly ash on the surfaces of the floating beads during the process; adding 50g of floating beads again, spraying maltose solution in a proper amount, slowly sieving 450g of fly ash, and spraying maltose solution in a proper amount according to actual conditions; and repeating the steps, adding the floating beads and the fly ash in equal proportion, in batches and in a staggered manner, so that the floating beads coated with the fly ash are cohered into a spherical shape, and the diameter of the spherical shape is controlled to be about 20-25 mm, thereby obtaining the ceramsite raw material ball.
Secondly, heat treatment of the ceramsite raw material balls.
1. And (3) placing the prepared ceramsite raw material balls in an electric heating drying oven, and drying for 24 hours at the temperature of 110 ℃.
2. And (3) placing the dried ceramsite raw material balls in an experimental electric furnace for heat treatment. The heat treatment system is as follows: room temperature-500 deg.C, 10 deg.C/min; keeping the temperature at 500 ℃ for 1 h; 500-1200 ℃ and 10 ℃/min; keeping the temperature at 1200 ℃ for 1 h; and cooling along with the furnace to obtain the light high-strength ceramsite.
And thirdly, testing performance indexes.
Through tests, the performance indexes of the light high-strength (cylinder pressure strength is more than 5 MPa) ceramsite prepared by the embodiment are as follows: watch (CN)Apparent density of 1.30g/cm 3 765kg/m bulk density 3 The cylinder pressure strength is 12.4MPa, and the water absorption rate is 3.3 percent.
Example 2:
firstly, preparing ceramsite raw material balls.
Raw materials: shale (taken from the town of hong city, yoyan county, Hengyang city, shale mine abandon), 40-mesh fly ash floating beads (hollow template), 15wt% maltose aqueous solution (adhesive), wherein the fly ash floating beads are commercial products, and the 15wt% maltose aqueous solution is configured in the same way as in example 1.
Equipment: a disc granulator, an electric heating drying box and an experimental electric furnace.
1. And (3) placing the shale powder in an electric heating drying oven, preserving heat and drying for 24 hours at the temperature of 110 ℃, then sieving the dried shale powder particles by using a 200-mesh sieve, and taking the sieved powder for later use.
2. Controlling the mass ratio of the floating beads to the shale to be 6:94, and weighing 120g of floating beads and 1880g of shale for later use.
3. Adding 40g of floating beads into a disc granulator, spraying a proper amount of maltose water solution into a mixing disc after starting the equipment, mixing for 3min, slowly adding about 627g of shale powder, and additionally spraying a proper amount of maltose solution according to the coating state of the shale powder on the surfaces of the floating beads; adding 40g of floating beads again, spraying maltose solution in a proper amount, slowly sieving about 627g of shale powder, and spraying maltose solution in a proper amount according to actual conditions; and repeating the steps, adding the floating beads and the shale powder in an equal proportion, in batches and in a staggered manner, so that a plurality of floating beads coated with the shale powder are cohered into a spherical shape, and the diameter of the spherical shape is controlled to be about 15-25 mm, thereby obtaining the ceramsite raw material ball.
Secondly, heat treatment of the ceramsite raw material balls.
1. And (3) placing the prepared ceramsite raw material balls in an electric heating drying oven, and drying for 24 hours at the temperature of 110 ℃.
2. And (3) placing the dried ceramsite raw material balls in an experimental electric furnace for heat treatment. The heat treatment system was as follows: room temperature-500 deg.C, 10 deg.C/min; keeping the temperature at 500 ℃ for 1 h; 500-1200 ℃ and 10 ℃/min; keeping the temperature at 1220 ℃ for 1 h; and cooling along with the furnace to obtain the light high-strength ceramsite.
And thirdly, testing performance indexes.
Through tests, the performance indexes of the light high-strength ceramsite prepared by the embodiment are as follows: apparent density 1.43g/cm 3 Bulk density 880kg/m 3 The cylinder pressure strength is 15.6MPa, and the water absorption is 3.0 percent.
Example 3:
firstly, preparing ceramsite raw material balls.
Raw materials: the raw materials of the self-lubricating type mullite-free composite material comprise fly ash (solid waste powder), 15-mesh mullite hollow spheres (hollow templates) and a maltose water solution (adhesive) with the concentration of 15wt%, wherein the maltose water solution with the concentration of 15wt% is a commercially available product, and the maltose water solution with the concentration of 15wt% is prepared by taking commercially available maltose as a functional component and tap water as a solvent.
Equipment: a disc granulator, an electric heating drying box and an experimental electric furnace.
1. Placing the fly ash in an electric heating drying oven, drying for 24h at 110 ℃, then sieving the dried fly ash particles by using a 200-mesh sieve, and taking the powder under the sieve for later use.
2. And controlling the mass ratio of the mullite hollow spheres to the fly ash to be 20:80, and weighing 400g of floating beads and 1600g of mullite hollow spheres for later use.
3. Adding 100g of mullite hollow spheres into a disc granulator, spraying a proper amount of maltose water solution into a mixing disc after starting the equipment, continuously mixing for 2min, slowly adding 400g of fly ash, and additionally spraying a proper amount of maltose solution according to the coating state of the fly ash on the surfaces of the mullite hollow spheres; adding 100g of mullite hollow spheres again, spraying maltose solution in a proper amount, slowly sieving 400g of fly ash, and spraying maltose solution in a proper amount according to actual conditions; and repeating the steps, adding the mullite hollow spheres and the fly ash in equal proportion in batches in a staggered manner, so that the plurality of mullite hollow spheres coated with the fly ash are cohered into a sphere, and the diameter of the sphere is controlled to be about 15-25 mm, thereby obtaining the ceramsite raw material sphere.
Secondly, heat treatment of the ceramsite raw material balls.
1. And (3) placing the prepared ceramsite raw material balls in an electric heating drying oven, and drying for 24 hours at the temperature of 110 ℃.
2. And (3) placing the dried ceramsite raw material balls in an experimental electric furnace for heat treatment. The heat treatment system is as follows: room temperature-500 deg.C, 10 deg.C/min; keeping the temperature at 500 ℃ for 1 h; 500-1200 ℃ and 10 ℃/min; keeping the temperature at 1200 ℃ for 1 h; and cooling along with the furnace to obtain the light high-strength ceramsite.
And thirdly, testing performance indexes.
Through tests, the performance indexes of the light high-strength ceramsite prepared by the embodiment are as follows: apparent density 1.25g/cm 3 Bulk density 660kg/m 3 The cylinder pressure strength is 10.5MPa, and the water absorption is 4.1 percent.
Example 4:
firstly, preparing ceramsite raw material balls.
Raw materials: the raw materials comprise waste earthwork (yellow soil obtained from a Zhuhui area in Heyang city of Hunan province), 20-mesh fly ash floating beads (hollow templates) and a white granulated sugar aqueous solution (adhesive) with the concentration of 10wt%, wherein the raw materials are all commercial products, and the white granulated sugar aqueous solution with the concentration of 10wt% is prepared by taking commercial white granulated sugar as a functional component and tap water as a solvent.
Equipment: a disc granulator, an electric heating drying box and an experimental electric furnace.
1. Crushing the yellow soil blocks, placing the crushed yellow soil blocks in an electric heating drying oven, preserving heat and drying for 24 hours at 110 ℃, then using a 200-mesh screen to sieve dry dust particles, and taking the sieved powder for later use.
2. Controlling the mass ratio of the floating beads to the soil ash to be 1:9, and weighing 200g of floating beads and 1800g of soil ash for later use.
3. Adding 50g of floating beads into a disc type granulator, spraying a proper amount of white granulated sugar aqueous solution into a mixing disc after starting the equipment, continuously mixing for 2min, slowly adding 450g of soil ash, and additionally spraying a proper amount of white granulated sugar solution according to the coating state of the soil ash on the surfaces of the floating beads during the process; adding 50g of floating beads again, supplementing and spraying a proper amount of white granulated sugar solution, slowly sieving 450g of soil ash, and supplementing and spraying a proper amount of white granulated sugar solution according to actual conditions; and repeating the steps, adding the floating beads and the soil ash in equal proportion, in batches and in a staggered manner, so that the plurality of floating beads coated with the soil ash are cohered into a spherical shape, and the diameter of the spherical shape is controlled to be about 15-25 mm, thereby obtaining the ceramsite raw material ball.
Secondly, heat treatment of the ceramsite raw material balls.
1. And (3) placing the prepared ceramsite raw material balls in an electric heating drying oven, and drying for 24 hours at the temperature of 110 ℃.
2. And (3) placing the dried ceramsite raw material balls in an experimental electric furnace for heat treatment. The heat treatment system is as follows: room temperature-500 deg.C, 10 deg.C/min; keeping the temperature at 500 ℃ for 1 h; 500-1300 ℃ and 10 ℃/min; preserving heat for 1h at 1300 ℃; and cooling along with the furnace to obtain the light high-strength ceramsite.
And thirdly, testing performance indexes.
Through tests, the performance indexes of the light high-strength ceramsite prepared by the embodiment are as follows: apparent density 1.25g/cm 3 Bulk density of 715kg/m 3 The cylinder pressure strength is 7.3MPa, and the water absorption rate is 2.8 percent.
Example 5:
firstly, preparing ceramsite raw material balls.
Raw materials: the clay tailing (low-grade clay, which is taken from the town of boundary of Hengyang county, Hengyang, Hunan province), 1-2 mm corundum hollow spheres (hollow template) and 15wt% of molasses aqueous solution (adhesive), wherein the raw materials are all commercial products, and the 15wt% of molasses aqueous solution is prepared by taking commercial molasses as a functional component and taking tap water as a solvent.
Equipment: a disc granulator, an electric heating drying box and an experimental electric furnace.
1. Placing the clay in an electric heating drying oven, drying at 110 deg.C for 24h, sieving with 180 mesh sieve, and collecting the sieved powder.
2. And controlling the mass ratio of the hollow template to the clay powder to be 7:43, and weighing 280g of corundum hollow spheres and 1720g of clay powder for later use.
3. Adding 70g of corundum hollow spheres into a disc granulator, spraying a proper amount of molasses water solution into a mixing disc after starting the equipment, continuously mixing for 2min, slowly adding 430g of soil ash, and additionally spraying a proper amount of molasses solution according to the coating state of clay powder on the surfaces of the corundum hollow spheres during the mixing; adding 70g of corundum hollow spheres again, spraying a proper amount of molasses solution again, slowly sieving 430g of clay powder, and spraying a proper amount of molasses solution again according to actual conditions; and repeating the steps, adding the hollow templates and the clay powder in equal proportion, in batches and in a staggered manner, so that a plurality of corundum hollow spheres coated with the clay powder are cohered into a sphere, and the diameter of the sphere is controlled to be about 15-25 mm, thereby obtaining the ceramsite raw material sphere.
Secondly, heat treatment of the ceramsite raw material balls.
1. And (3) placing the prepared ceramsite raw material balls in an electric heating drying oven, and drying for 24 hours at the temperature of 110 ℃.
2. And (3) placing the dried ceramsite raw material balls in an experimental electric furnace for heat treatment. The heat treatment system is as follows: room temperature-500 deg.C, 10 deg.C/min; keeping the temperature at 500 ℃ for 1 h; 500-1350 ℃ and 10 ℃/min; keeping the temperature at 1350 ℃ for 1 h; and cooling along with the furnace to obtain the light high-strength ceramsite.
And thirdly, testing performance indexes.
Through tests, the performance indexes of the light high-strength ceramsite prepared by the embodiment are as follows: apparent density 1.12g/cm 3 Bulk density 535kg/m 3 The cylinder pressure strength is 7.4MPa, and the water absorption is 4.1%.
The raw materials used for preparing the ceramsite in the above embodiments are common solid wastes, the sources are wide, the price is low, and the granular hollow template with the melting point higher than the sintering temperature of the solid waste powder is used as the pore-forming agent, so that the internal cavity structure of the granular hollow template can be kept from being damaged in the high-temperature sintering stage, and the size and the addition amount of the pores in the ceramsite can be adjusted and controlled only by adjusting the size and the addition amount of the granular hollow template. From the performance test results of the ceramsite, the ceramsite with light weight, high strength and low water absorption rate is prepared by adopting the single solid waste powder in the embodiment, a complex component design process is not needed, and the problems that the pore structure is difficult to regulate and control and the raw material ratio is complex when the ceramsite is prepared by the prior art are fundamentally solved.
It should be noted that, most of the ceramsite prepared by the prior art has fine cracks on the surface and around the pores, as can be seen from fig. 2a, no crack is found on the surface of the ceramsite prepared by the present invention, as can be seen from fig. 2b, the section of the knocked-off ceramsite is smooth and has a compact structural form, and no fine crack is found around the pores. The reason for the difference is probably because the invention adopts the granular hollow template with the melting point higher than the sintering temperature of the solid waste powder as the pore-forming agent, and the hollow template plays a role of skeleton support and enables the stress inside the ceramsite to be uniformly dispersed on each granular hollow template in the processes of sintering the raw material of the ceramsite and cooling shrinkage after sintering, thereby avoiding the situations that the pore is deformed/collapsed and the stress is concentrated to develop fine cracks on the surface of the ceramsite and around the pore during high-temperature sintering and cooling shrinkage. As fine cracks develop on the surface and around the pores, the ceramsite prepared by the conventional method is subjected to changes of air humidity and temperature in the storage process, the fine cracks have the possibility of further development, and particularly, when the ceramsite is subjected to heavy pressure (particularly the ceramsite is subjected to heavy pressure after absorbing water), the cracks grow rapidly, so that the whole ceramsite is crushed and cracked. The ceramsite prepared by the method has compact surface and pore periphery structure and no cracks, so that the low water absorption rate can be ensured for a long time, the structural stability of the ceramsite in the storage process is better, and the compressive strength of concrete can be better ensured when the ceramsite is used as a lightweight aggregate to be applied to concrete materials.
It will be appreciated by those skilled in the art that the above embodiments are only preferred implementations of the invention, and that the invention may be implemented in other ways, and that any obvious alternative without departing from the concept of the invention is within the scope of the invention.
Some of the drawings and descriptions of the present invention have been simplified to facilitate the understanding of the improvements over the prior art by those skilled in the art, and some other elements have been omitted from this document for the sake of clarity, and it should be appreciated by those skilled in the art that such omitted elements may also constitute the subject matter of the present invention.
Claims (10)
1. The preparation method of the light high-strength ceramsite based on the solid waste is characterized by comprising the following steps of:
1) taking solid waste powder with proper granularity and a granular hollow template with the melting point higher than the sintering temperature of the solid waste powder as main raw materials;
2) coating a proper amount of solid waste powder on the surface of the granular hollow template by using an adhesive, and conglomerating the granular hollow template coated with the solid waste powder on the surface into a spherical shape to obtain a ceramsite raw material ball;
3) and sintering the dried raw ceramsite spheres at the temperature lower than the melting point of the granular hollow template, ensuring that the cavity structure of the granular hollow template is not damaged, and cooling the sintered raw ceramsite spheres along with a furnace to obtain the light high-strength ceramsite.
2. The method for preparing light-weight high-strength ceramsite according to claim 1, wherein the method comprises the following steps: the particle size of the solid waste powder is less than 0.088mm, and the particle size of the granular hollow template is 0.1 mm-3 mm.
3. The method for preparing light-weight high-strength ceramsite according to claim 1, wherein the method comprises the following steps: the binder is an aqueous solution of sugar or molasses.
4. The method for preparing light-weight high-strength ceramsite according to any one of claims 1-3, wherein the method comprises the following steps: the solid waste is one of fly ash, shale, waste earthwork and clay tailings.
5. The method for preparing light-weight high-strength ceramsite according to any one of claims 1-3, wherein the method comprises the following steps: the granular hollow template is a fly ash floating bead, a corundum hollow sphere or a mullite hollow sphere.
6. The method for preparing light-weight high-strength ceramsite as claimed in any one of claims 1-3, wherein the method comprises the following steps: the mass ratio of the granular hollow template to the solid waste powder is 1: (4-16).
7. The method for preparing the light-weight high-strength ceramsite as claimed in claim 3, wherein the method comprises the following steps: the concentration of sugar or molasses in the adhesive is (5-15) wt%.
8. The method for preparing the light-weight high-strength ceramsite according to any one of claims 1-3, wherein in the step 2): adding a proper amount of granular hollow templates into a disc granulator, spraying a proper amount of adhesive into a mixing disc after starting the equipment, uniformly mixing, slowly adding a proper amount of solid waste powder, and additionally spraying a proper amount of adhesive during the period that the solid waste powder is coated on the surfaces of the granular hollow templates; repeating the operation, and adding the granular hollow templates and the solid waste powder alternately in equal proportion in batches to finally prepare the ceramsite raw material ball.
9. The method for preparing light-weight high-strength ceramsite according to any one of claims 1-3, wherein in the step 3): the drying temperature of the ceramsite raw material ball is lower than the decomposition temperature of the functional components in the adhesive, the sintering process adopts sectional heating and heat preservation, the highest temperature is 950-1350 ℃, the heat preservation is carried out for 10-90 min at the highest temperature stage, and then the ceramsite raw material ball is cooled to the room temperature along with the furnace.
10. The light-weight high-strength ceramsite prepared by the preparation method of any one of claims 1-9.
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