Solid waste utilization method for regenerating waste bricks, obtained regenerated waste brick powder and application of regenerated waste brick powder
Through mechanical grinding and carbonization treatment, the waste red bricks are converted into recycled waste brick powder, which solves the problems of complex operation, high energy consumption and low efficiency in the existing technology, and realizes efficient and environmentally friendly brick powder recycling, which improves the strength and utilization of recycled brick powder.
Patent Information
- Application Number
- CN202411851363.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-03-21
AI Technical Summary
The existing brick powder recycling technology is complex in operation, energy consumption and low efficiency, making it difficult to achieve simple, environmentally friendly and efficient recycling.
Through mechanical grinding and carbonization treatment, the discarded red bricks are converted into recycled brick powder, and recycled waste brick powder is obtained by filtration and drying, which is used to make cement mortar instead of cement.
It improves the strength and utilization rate of recycled brick powder, simplifies the operation process, reduces energy consumption, and the generated recycled waste brick powder is safe and environmentally friendly.
Smart Images
Figure CN119661106A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of waste brick recycling, and in particular to a solid waste utilization method for recycling waste bricks, and the obtained recycled waste brick powder and application of the recycled waste brick powder. Background Art
[0002] Waste bricks are one of the construction wastes discharged in large quantities, which puts great pressure on environmental protection, but they are also a renewable and recyclable building material. Foreign research on the resource utilization of waste bricks has achieved certain results. Studies have shown that brick powder contains a large amount of volcanic ash components, which can be mixed with lime, mortar, and hard paste to prepare wall materials. Domestic research on the resource utilization of waste bricks is still in its infancy. There are related studies that apply fine red brick powder to the lining of the cupola. The results show that there is little erosion on the furnace wall, and the inner wall surface is smooth and clean, with only a small amount of coke waste slag and debris hanging on it; there are also studies on the use of waste brick powder, lime and sand to produce small hollow blocks. The results show that waste brick powder can replace part of the natural sand in the building mortar to prepare recycled mortar.
[0003] The development of waste brick solid waste utilization technology not only reduces the adverse effects of waste bricks on the environment, but also greatly promotes the recycling rate of waste bricks, which is of great significance to the contradiction between supply and demand of green production in my country. However, the current brick powder recycling technology faces a series of problems such as complex operation, high energy consumption and low efficiency. How to make the brick powder recycling technology simpler, more environmentally friendly and more effective has become one of the main problems to be solved. Summary of the invention
[0004] In view of this, the present invention provides a solid waste utilization method for regenerating waste bricks and the obtained recycled waste brick powder and the application of the recycled waste brick powder, so as to solve a series of problems faced by the current brick powder regeneration technology, such as complex operation, high energy consumption, and low efficiency.
[0005] In order to achieve the above object, the present invention adopts the following technical solution:
[0006] The present invention provides a solid waste utilization method for regenerating waste bricks, comprising the following steps:
[0007] S1. Mechanical grinding: The waste red bricks are crushed, screened and ball-milled in sequence to obtain recycled brick powder;
[0008] S2. Carbonization treatment: Mix the recycled brick powder and water to obtain a suspension of recycled brick powder; filter the recycled brick powder suspension, take out the solid and dry it to obtain recycled waste brick powder.
[0009] Preferably, the ball milling time is 100 to 130 minutes; the medium used for ball milling includes ceramic balls; and the ball-to-material ratio of ball milling is 1:1.5 to 2.
[0010] Preferably, the particle size of the recycled brick powder is ≤150 μm.
[0011] Preferably, the mass ratio of the recycled brick powder to water is 1:1-2; the mixing time is 0.5-1.5h; filtering is performed using a sand core funnel; CO2 is introduced during the filtration process, and the flow rate of CO2 is 0.5-2L / min; and the filtration time is 2-5min.
[0012] Preferably, the drying temperature is 50-80° C., and the drying time is 40-48 hours.
[0013] Preferably, the powder obtained after drying is sieved, and the sieve used is a standard sieve of 0.075 mm.
[0014] The present invention also provides recycled waste brick powder prepared by the solid waste utilization method for recycling waste bricks.
[0015] The present invention also provides the use of the recycled waste brick powder in preparing cement mortar. The cement mortar is prepared from raw materials including the following parts by weight: 50-150 parts of recycled waste brick powder, 850-950 parts of cement, 1400-1500 parts of sand and 500-600 parts of water.
[0016] Preferably, the sand comprises medium sand with a fineness modulus of 2.56.
[0017] It can be seen from the above technical solution that compared with the prior art, the present invention has the following beneficial effects:
[0018] The present invention relates to the technical field of waste brick recycling and treatment, and specifically to a solid waste utilization method for recycling waste bricks, providing an effective method for improving the utilization rate of waste bricks. It mainly includes: mechanical grinding and carbonization treatment. Through this treatment method, brick powder can be used to replace cement to make cement mortar, and the particle size of the recycled brick powder can be reduced, and the generated CaCO3 content can be increased, so that its strength is higher than that of untreated brick powder. The entire recycled waste brick powder is simple to operate, low-toxic, non-irritating, low-corrosive, safe and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0020] Figure 1 FTIR analysis comparison diagram of cement mortar test blocks obtained in Example 1 and Comparative Example 1;
[0021] Figure 2 It is a comparison chart of the compressive strength of cement mortar test blocks obtained in Examples 1 to 3 and Comparative Examples 1 to 8 at different ages. DETAILED DESCRIPTION
[0022] The present invention provides a solid waste utilization method for regenerating waste bricks, comprising the following steps:
[0023] S1. Mechanical grinding: The waste red bricks are crushed, screened and ball-milled in sequence to obtain recycled brick powder;
[0024] S2. Carbonization treatment: Mix the recycled brick powder and water to obtain a suspension of recycled brick powder; filter the recycled brick powder suspension, take out the solid and dry it to obtain recycled waste brick powder.
[0025] In the present invention, the ball milling time is preferably 100 to 130 min, more preferably 110 to 125 min, and more preferably 115 to 120 min; the medium used for ball milling includes ceramic balls; the ball-to-material ratio of ball milling is preferably 1:1.5 to 2, more preferably 1:1.8, and more preferably 1:1.5.
[0026] In the present invention, the particle size of the recycled brick powder is preferably ≤150 μm, more preferably ≤140 μm, and more preferably ≤130 μm.
[0027] In the present invention, the mass ratio of the recycled brick powder and water is preferably 1:1-2, and more preferably 1:1.5; the mixing time is preferably 0.5-1.5h, and more preferably 1h; filtering is performed using a sand core funnel; CO2 is introduced during the filtration process, and the flow rate of CO2 is preferably 0.5-2L / min, and more preferably 1-1.5L / min; the filtration time is preferably 2-5min, and more preferably 2.5-4min, and more preferably 3-3.5min.
[0028] In the present invention, the drying temperature is preferably 50 to 80° C., more preferably 60 to 70° C.; the drying time is preferably 40 to 48 hours, more preferably 42 to 46 hours, and more preferably 43 to 45 hours.
[0029] In the present invention, the powder obtained after drying is sieved, and the sieve used is a standard sieve of 0.075 mm.
[0030] The present invention also provides recycled waste brick powder prepared by the solid waste utilization method for recycling waste bricks.
[0031] The present invention also provides the use of the recycled waste brick powder in preparing cement mortar. The cement mortar is prepared from raw materials including the following parts by weight: 50-150 parts of recycled waste brick powder, 850-950 parts of cement, 1400-1500 parts of sand and 500-600 parts of water.
[0032] In the present invention, the amount of the recycled waste brick powder is preferably 60 to 140 parts, more preferably 70 to 120 parts, and more preferably 80 to 100 parts; the amount of the cement is preferably 860 to 940 parts, more preferably 880 to 930 parts, and more preferably 900 to 920 parts; the amount of the sand is preferably 1420 to 1480 parts, more preferably 1440 to 1460 parts, and more preferably 1450 parts; the amount of water is preferably 520 to 580 parts, more preferably 540 to 560 parts, and more preferably 550 parts.
[0033] In the present invention, the sand includes medium sand with a fineness modulus of 2.56.
[0034] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.
[0035] Example 1
[0036] S1. The waste red bricks with cement mortar to be treated are crushed and sieved in sequence; the obtained powder is placed in a ball mill and ball milled for 120 minutes to obtain recycled brick powder; the medium used for ball milling is ceramic balls, the ball-to-material ratio of ball milling is 1:1.5, and the specifications and proportions of ball milling media are as follows: the diameters of ball milling media are 5mm, 10mm, and 15mm, accounting for 30%, 50%, and 20% respectively;
[0037] S2. Mix the recycled brick powder and water in a mass ratio of 1:1 for 1 hour to obtain a suspension of recycled brick powder with good dispersion and stable pH value; pour the recycled brick powder suspension into a sand core funnel and introduce CO2, control the CO2 flow rate to 1L / min, quickly close the CO2 ventilation valve after 2.5 minutes, take out the carbonized recycled brick powder suspension and place it in a sand core funnel for immediate filtration, take the filtered solid and place it in a vacuum drying environment at 60℃ for 48 hours, after drying, use a 0.075mm standard sieve for sieving and vacuum sealing to store it, which is the recycled waste brick powder;
[0038] S3. Take 50g of recycled waste brick powder, 950g of cement, and 1500g of sand (the sand is medium sand with a fineness modulus of 2.56) and add them to the cement mortar mixing pot in sequence, and stir them for 3 minutes; then add 500g of water into the cement mortar mixing pot and stir for 2 minutes until it is fully uniform; inject the newly mixed mortar into a 50mm×50mm×50mm mold, and place it in a constant temperature box with a humidity of 95% and a temperature of 20°C for curing to obtain a cement mortar test block.
[0039] Example 2
[0040] S1. The waste red bricks with cement mortar to be treated are crushed and sieved in sequence; the obtained powder is placed in a ball mill and ball milled for 120 minutes to obtain recycled brick powder; the medium used for ball milling is ceramic balls, the ball-to-material ratio of ball milling is 1:1.5, and the specifications and proportions of ball milling media are as follows: the diameters of ball milling media are 5mm, 10mm, and 15mm, accounting for 30%, 50%, and 20% respectively;
[0041] S2. Mix the recycled brick powder and water in a mass ratio of 1:1 for 1 hour to obtain a suspension of recycled brick powder with good dispersion and stable pH value; pour the recycled brick powder suspension into a sand core funnel and introduce CO2, control the CO2 flow rate to 1L / min, quickly close the CO2 ventilation valve after 2.5 minutes, take out the carbonized recycled brick powder suspension and place it in a sand core funnel for immediate filtration, take the filtered solid and place it in a vacuum drying environment at 60℃ for 48 hours, after drying, use a 0.075mm standard sieve for sieving and vacuum sealing to store it, which is the recycled waste brick powder;
[0042] S3. Take 100g of recycled waste brick powder, 900g of cement, and 1500g of sand (the sand is medium sand with a fineness modulus of 2.56) and add them to the cement mortar mixing pot in sequence, and stir them for 3 minutes; then add 500g of water into the cement mortar mixing pot and stir for 2 minutes until it is fully uniform; inject the newly mixed mortar into a 50mm×50mm×50mm mold, and place it in a constant temperature box with a humidity of 95% and a temperature of 20°C for curing to obtain a cement mortar test block.
[0043] Example 3
[0044] S1. The waste red bricks with cement mortar to be treated are crushed and sieved in sequence; the obtained powder is placed in a ball mill and ball milled for 120 minutes to obtain recycled brick powder; the medium used for ball milling is ceramic balls, the ball-to-material ratio of ball milling is 1:1.5, and the specifications and proportions of ball milling media are as follows: the diameters of ball milling media are 5mm, 10mm, and 15mm, accounting for 30%, 50%, and 20% respectively;
[0045] S2. Mix the recycled brick powder and water in a mass ratio of 1:1 for 1 hour to obtain a suspension of recycled brick powder with good dispersion and stable pH value; pour the recycled brick powder suspension into a sand core funnel and introduce CO2, control the CO2 flow rate to 1L / min, quickly close the CO2 ventilation valve after 2.5 minutes, take out the carbonized recycled brick powder suspension and place it in a sand core funnel for immediate filtration, take the filtered solid and place it in a vacuum drying environment at 60℃ for 48 hours, after drying, use a 0.075mm standard sieve for sieving and vacuum sealing to store it, which is the recycled waste brick powder;
[0046] S3. Take 150g of recycled waste brick powder, 850g of cement, and 1500g of sand (the sand is medium sand with a fineness modulus of 2.56) and add them to the cement mortar mixing pot in sequence, and stir them for 3 minutes; then add 500g of water into the cement mortar mixing pot and stir for 2 minutes until it is fully uniform; inject the newly mixed mortar into a 50mm×50mm×50mm mold, and place it in a constant temperature box with a humidity of 95% and a temperature of 20°C for curing to obtain a cement mortar test block.
[0047] Comparative Example 1
[0048] Take 1000g of cement and 1500g of sand (the sand is medium sand with a fineness modulus of 2.56) and add them to the cement mortar mixing pot in sequence, and dry stir for 3 minutes; then add 500g of water into the cement mortar mixing pot and stir for 2 minutes until it is fully uniform; inject the newly mixed mortar into a 50mm×50mm×50mm mold, and place it in a constant temperature box with a humidity of 95% and a temperature of 20°C for curing to obtain a cement mortar test block.
[0049] Comparative Example 2
[0050] S1. The waste red bricks with cement mortar to be treated are crushed and sieved in sequence; the obtained powder is placed in a ball mill and ball milled for 120 minutes to obtain recycled brick powder; the medium used for ball milling is ceramic balls, the ball-to-material ratio of ball milling is 1:1.5, and the specifications and proportions of ball milling media are as follows: the diameters of ball milling media are 5mm, 10mm, and 15mm, accounting for 30%, 50%, and 20% respectively;
[0051] S2. Take 50g of recycled brick powder, 950g of cement, and 1500g of sand (the sand is medium sand with a fineness modulus of 2.56) and add them to the cement mortar mixing pot in sequence, and stir them for 3 minutes; then add 500g of water into the cement mortar mixing pot and stir for 2 minutes until it is fully uniform; inject the newly mixed mortar into a 50mm×50mm×50mm mold, and place it in a constant temperature box with a humidity of 95% and a temperature of 20°C for curing to obtain a cement mortar test block.
[0052] Comparative Example 3
[0053] S1. The waste red bricks with cement mortar to be treated are crushed and sieved in sequence; the obtained powder is placed in a ball mill and ball milled for 120 minutes to obtain recycled brick powder; the medium used for ball milling is ceramic balls, the ball-to-material ratio of ball milling is 1:1.5, and the specifications and proportions of ball milling media are as follows: the diameters of ball milling media are 5mm, 10mm, and 15mm, accounting for 30%, 50%, and 20% respectively;
[0054] S2. Take 100g of recycled brick powder, 900g of cement, and 1500g of sand (the sand is medium sand with a fineness modulus of 2.56) and add them to the cement mortar mixing pot in sequence, and stir them for 3 minutes; then add 500g of water into the cement mortar mixing pot and stir for 2 minutes until it is fully uniform; inject the newly mixed mortar into a 50mm×50mm×50mm mold, and place it in a constant temperature box with a humidity of 95% and a temperature of 20°C for curing to obtain a cement mortar test block.
[0055] Comparative Example 4
[0056] S1. The waste red bricks with cement mortar to be treated are crushed and sieved in sequence; the obtained powder is placed in a ball mill and ball milled for 120 minutes to obtain recycled brick powder; the medium used for ball milling is ceramic balls, the ball-to-material ratio of ball milling is 1:1.5, and the specifications and proportions of ball milling media are as follows: the diameters of ball milling media are 5mm, 10mm, and 15mm, accounting for 30%, 50%, and 20% respectively;
[0057] S2. Take 150g of recycled brick powder, 850g of cement, and 1500g of sand (the sand is medium sand with a fineness modulus of 2.56) and add them to the cement mortar mixing pot in sequence, and stir them for 3 minutes; then add 500g of water into the cement mortar mixing pot and stir for 2 minutes until it is fully uniform; inject the newly mixed mortar into a 50mm×50mm×50mm mold, and place it in a constant temperature box with a humidity of 95% and a temperature of 20°C for curing to obtain a cement mortar test block.
[0058] Comparative Example 5
[0059] S1. The waste red bricks with cement mortar to be treated are crushed and sieved in sequence; the obtained powder is placed in a ball mill and ball milled for 120 minutes to obtain recycled brick powder; the medium used for ball milling is ceramic balls, the ball-to-material ratio of ball milling is 1:1.5, and the specifications and proportions of ball milling media are as follows: the diameters of ball milling media are 5mm, 10mm, and 15mm, accounting for 30%, 50%, and 20% respectively;
[0060] S2. Take 200g of recycled brick powder, 800g of cement, and 1500g of sand (the sand is medium sand with a fineness modulus of 2.56) and add them to the cement mortar mixing pot in sequence, and stir them for 3 minutes; then add 500g of water into the cement mortar mixing pot and stir for 2 minutes until it is fully uniform; inject the newly mixed mortar into a 50mm×50mm×50mm mold, and place it in a constant temperature box with a humidity of 95% and a temperature of 20°C for curing to obtain a cement mortar test block.
[0061] Comparative Example 6
[0062] S1. The waste red bricks with cement mortar to be treated are crushed and sieved in sequence; the obtained powder is placed in a ball mill and ball milled for 120 minutes to obtain recycled brick powder; the medium used for ball milling is ceramic balls, the ball-to-material ratio of ball milling is 1:1.5, and the specifications and proportions of ball milling media are as follows: the diameters of ball milling media are 5mm, 10mm, and 15mm, accounting for 30%, 50%, and 20% respectively;
[0063] S2. Take 300g of recycled brick powder, 700g of cement, and 1500g of sand (the sand is medium sand with a fineness modulus of 2.56) and add them to the cement mortar mixing pot in sequence, and stir them for 3 minutes; then add 500g of water into the cement mortar mixing pot and stir for 2 minutes until it is fully uniform; inject the newly mixed mortar into a 50mm×50mm×50mm mold, and place it in a constant temperature box with a humidity of 95% and a temperature of 20°C for curing to obtain a cement mortar test block.
[0064] Comparative Example 7
[0065] S1. The waste red bricks with cement mortar to be treated are crushed and sieved in sequence; the obtained powder is placed in a ball mill and ball milled for 120 minutes to obtain recycled brick powder; the medium used for ball milling is ceramic balls, the ball-to-material ratio of ball milling is 1:1.5, and the specifications and proportions of ball milling media are as follows: the diameters of ball milling media are 5mm, 10mm, and 15mm, accounting for 30%, 50%, and 20% respectively;
[0066] S2. Mix the recycled brick powder and water in a mass ratio of 1:1 for 1 hour to obtain a suspension of recycled brick powder with good dispersion and stable pH value; pour the recycled brick powder suspension into a sand core funnel and introduce CO2, control the CO2 flow rate to 1L / min, quickly close the CO2 ventilation valve after 2.5 minutes, take out the carbonized recycled brick powder suspension and place it in a sand core funnel for immediate filtration, take the filtered solid and place it in a vacuum drying environment at 60℃ for 48 hours, after drying, use a 0.075mm standard sieve for sieving and vacuum sealing to store it, which is the recycled waste brick powder;
[0067] S3. Take 200g of recycled waste brick powder, 800g of cement, and 1500g of sand (the sand is medium sand with a fineness modulus of 2.56) and add them to the cement mortar mixing pot in sequence, and stir them for 3 minutes; then add 500g of water into the cement mortar mixing pot and stir for 2 minutes until it is fully uniform; inject the newly mixed mortar into a 50mm×50mm×50mm mold, and place it in a constant temperature box with a humidity of 95% and a temperature of 20°C for curing to obtain a cement mortar test block.
[0068] Comparative Example 8
[0069] S1. The waste red bricks with cement mortar to be treated are crushed and sieved in sequence; the obtained powder is placed in a ball mill and ball milled for 120 minutes to obtain recycled brick powder; the medium used for ball milling is ceramic balls, the ball-to-material ratio of ball milling is 1:1.5, and the specifications and proportions of ball milling media are as follows: the diameters of ball milling media are 5mm, 10mm, and 15mm, accounting for 30%, 50%, and 20% respectively;
[0070] S2. Mix the recycled brick powder and water in a mass ratio of 1:1 for 1 hour to obtain a suspension of recycled brick powder with good dispersion and stable pH value; pour the recycled brick powder suspension into a sand core funnel and introduce CO2, control the CO2 flow rate to 1L / min, quickly close the CO2 ventilation valve after 2.5 minutes, take out the carbonized recycled brick powder suspension and place it in a sand core funnel for immediate filtration, take the filtered solid and place it in a vacuum drying environment at 60℃ for 48 hours, after drying, use a 0.075mm standard sieve for sieving and vacuum sealing to store it, which is the recycled waste brick powder;
[0071] S3. Take 300g of recycled waste brick powder, 700g of cement, and 1500g of sand (the sand is medium sand with a fineness modulus of 2.56) and add them to the cement mortar mixing pot in sequence, and stir them for 3 minutes; then add 500g of water into the cement mortar mixing pot and stir for 2 minutes until it is fully uniform; inject the newly mixed mortar into a 50mm×50mm×50mm mold, and place it in a constant temperature box with a humidity of 95% and a temperature of 20°C for curing to obtain a cement mortar test block.
[0072] The chemical composition of recycled brick powder and carbonized recycled brick powder was analyzed by FTIR technology. The results are as follows: Figure 1 shown. Figure 1 The FTIR analysis comparison diagram of the cement mortar test blocks obtained in Example 1 and Comparative Example 1 is shown in FIG. Figure 1 It can be seen that at 875cm -1 The absorption peak is υ4(CO3 2- ) bending vibration, 1430cm -1 and 1445cm -1 is υ3(CO3 2-) are related to CaCO3 in the recycled brick powder. It can be seen that the absorption peak related to CaCO3 in the carbonized recycled brick powder is enhanced, indicating that the CaCO3 in the sample increases. Located at 3394cm -1 With 3439cm -1 The absorption peak is OH -1 The stretching vibration of OH -1 The ion absorption peak weakened, indicating that CO2 and OH -1 Reacts to form CO3 2- The above results indicate that the method for treating waste red bricks provided by the present invention can effectively replace cement with brick powder.
[0073] The compressive strength was tested according to GB / T 50107-2010 "Standard for Testing and Evaluation of Concrete Strength". The results are as follows: Figure 2 shown. Figure 2 The following is a comparison chart of the compressive strength of cement mortar test blocks obtained in Examples 1 to 3 and Comparative Examples 1 to 8 at different ages. Figure 2 It can be seen that the treatment method of waste red bricks provided by the present invention can further improve its compressive strength. When the cement replacement rate of recycled waste brick powder is 5%, the strength reaches the highest and is greater than the strength of the conventional cement mortar test block described in Comparative Example 1. Compared with Comparative Example 1, the 3d compressive strength is increased by 19.42%, the 7d compressive strength is increased by 17.73%, and the 28d compressive strength is increased by 6.71%.
[0074] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.
Claims
1. A solid waste utilization method for regenerating waste bricks, characterized in that: The steps include: S1. Mechanical grinding: The discarded red bricks are crushed, screened and ball-milled in sequence to obtain recycled brick powder; S2. Carbonization treatment: Mix the recycled brick powder and water to obtain a suspension of recycled brick powder; filter the recycled brick powder suspension, take out the solid and dry it to obtain recycled waste brick powder.
2. The solid waste utilization method for regenerating waste bricks according to claim 1, characterized in that: The ball milling time is 100 to 130 minutes; the medium used for ball milling includes ceramic balls; and the ball-to-material ratio of ball milling is 1:1.5 to 2.
3. The solid waste utilization method for regenerating waste bricks according to claim 1 or 2, characterized in that: The particle size of the recycled brick powder is ≤150 μm.
4. The solid waste utilization method for regenerating waste bricks according to claim 3 is characterized in that: The mass ratio of the recycled brick powder to water is 1:1-2; the mixing time is 0.5-1.5 hours; filtering is performed using a sand core funnel; CO2 is introduced during the filtering process, and the flow rate of CO2 is 0.5-2L / min; and the filtering time is 2-5 minutes.
5. The solid waste utilization method for regenerating waste bricks according to claim 1, 2 or 4, characterized in that: The drying temperature is 50-80° C., and the drying time is 40-48 hours.
6. The solid waste utilization method for regenerating waste bricks according to claim 5, characterized in that: After the drying, the obtained powder is sieved, and the sieve used is a standard sieve of 0.075 mm.
7. Regenerated waste brick powder obtained by the solid waste utilization method for regenerating waste bricks as described in any one of claims 1 to 6.
8. The use of recycled waste brick powder in preparing cement mortar according to claim 7, characterized in that: The cement mortar is prepared from the following raw materials in parts by weight: 50-150 parts of recycled waste brick powder, 850-950 parts of cement, 1400-1500 parts of sand and 500-600 parts of water.
9. The use of recycled waste brick powder in preparing cement mortar according to claim 8, characterized in that: The sand includes medium sand having a fineness modulus of 2.56.