Integrated process method and system for producing recycled aggregate and recycled powder

Abstract

The invention discloses an integrated process method and system for producing recycled aggregate and recycled powder, and the method comprises the following steps: carrying out particle shaping and mechanical grinding operation on original recycled aggregate in sequence to obtain recycled aggregate and surface mortar; performing image recognition on the recycled aggregate to obtain first recycled coarse aggregate of which the surface mortar content meets the requirement; if the surface mortar content of the recycled aggregate is less than a threshold value, performing carbonization enhancement on the first recycled aggregate to obtain a second recycled coarse aggregate meeting the strength requirement; finally, the surface mortar is sequentially subjected to mortar grinding and carbonization enhancement operation, and regenerated powder is obtained. According to the invention, two production processes of the recycled aggregate and the recycled powder are integrated, the tedious process flow is reduced, and the time and energy consumption for producing the recycled product are saved.

Description

Technical Field

[0001] The invention belongs to the technical field of resource utilization of construction solid waste, and in particular relates to an integrated process method for producing recycled aggregate and recycled powder. Background Art

[0002] The blocks with a particle size of 5mm-31.5mm formed after the discarded concrete blocks are crushed, cleaned and graded are called recycled aggregates, which can partially or completely replace natural aggregates such as sand and gravel to prepare recycled concrete, and have significant resource and environmental advantages.

[0003] However, the existing crushing and screening process can only make the recycled aggregate simply meet the particle size requirements, but cannot further improve the quality of the recycled aggregate. The recycled aggregate obtained by the existing process has a rough surface, a large amount of hardened cement paste attached, and a large number of initial microcracks inside the aggregate, resulting in the recycled aggregate having the disadvantages of large porosity, high water absorption, low bulk density, and high crushing index compared with natural aggregate. This will further lead to a decrease in the workability of recycled concrete and an increase in slump loss, which will have an adverse effect on the mechanical properties of recycled aggregate and hinder the large-scale application of recycled concrete. In addition, a large amount of dust will be generated during the crushing process of recycled aggregate, causing significant air pollution.

[0004] The regenerated powder obtained by the existing process may agglomerate or have uneven particle size distribution during the grinding process, which will lead to high production energy consumption, low efficiency and affect the quality of the regenerated powder. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes an integrated process method for the production of recycled aggregate and recycled powder to solve the problems existing in the above prior art.

[0006] To achieve the above object, the present invention provides an integrated process for producing recycled aggregate and recycled powder, comprising the following steps:

[0007] The original recycled aggregate is successively subjected to particle shaping and mechanical grinding operations to obtain recycled aggregate and surface mortar;

[0008] Performing image recognition on the recycled aggregate to obtain a first recycled coarse aggregate whose surface mortar content meets the requirements; if the surface mortar content of the recycled aggregate is less than a threshold value, carbonizing and strengthening the first recycled aggregate to obtain a second recycled coarse aggregate that meets the strength requirements;

[0009] The surface mortar is subjected to mortar grinding and carbonization strengthening operations in sequence to obtain regenerated powder.

[0010] Preferably, the process of particle shaping of the original recycled aggregate comprises:

[0011] The original recycled aggregate is screened, dried and mixed, and then subjected to pressure, shear and thermal action through a particle forming mechanism to form a preliminary particle structure. Finally, it is trimmed and shaped through a particle shaping device to obtain recycled aggregate with a surface shape that meets the requirements.

[0012] Preferably, the process of mechanical grinding comprises:

[0013] The recycled aggregate with surface shape meeting the requirements is put into a mechanical device for grinding, and then the ground recycled aggregate is separated by a fan to obtain recycled aggregate and surface mortar.

[0014] Preferably, the process of performing image recognition on the recycled aggregate to obtain the first recycled coarse aggregate having a surface mortar content that meets the requirements comprises:

[0015] A surface mortar content threshold is set, and the first recycled coarse aggregate having a surface mortar content that meets the requirement is screened out through image recognition technology and the surface mortar content threshold.

[0016] Preferably, the process of carbonizing and strengthening the first recycled aggregate to obtain the second recycled coarse aggregate meeting the strength requirement comprises:

[0017] The first recycled aggregate is placed in a carbonization box, and the surface mortar of the first recycled aggregate is carbonized by carbon dioxide gas to obtain a second recycled coarse aggregate that meets the strength requirements.

[0018] Preferably, the process of mortar grinding the surface mortar comprises:

[0019] The surface mortar is sent to a regenerated powder grinding box, and the surface mortar is ground according to the fineness required by different requirements to obtain a ground surface mortar.

[0020] Preferably, the process of carbonizing and strengthening the ground surface mortar comprises:

[0021] The ground surface mortar is put into a carbonization box, and the ground surface mortar is carbonized by carbon dioxide gas to obtain regenerated powder.

[0022] In order to achieve the above technical objectives, the present invention also provides an integrated process system for the production and carbonization enhancement of recycled aggregate and recycled powder, which is used to implement the integrated process method for the production of recycled aggregate and recycled powder. The system comprises:

[0023] The material processing module is used to process the original recycled aggregate through particle shaping and mechanical grinding operations in sequence to obtain recycled aggregate and surface mortar;

[0024] A recycled aggregate production module is used to perform image recognition on the recycled aggregate to obtain a first recycled coarse aggregate whose surface mortar content meets the requirements; if the surface mortar content of the recycled aggregate is less than a threshold, carbonization enhancement is performed on the first recycled aggregate to obtain a second recycled coarse aggregate that meets the strength requirements;

[0025] The regenerated powder production module is used to perform mortar grinding and carbonization strengthening operations on the surface mortar in sequence to obtain regenerated powder.

[0026] Compared with the prior art, the present invention has the following advantages and technical effects:

[0027] The present invention provides an integrated process method for producing recycled aggregate and recycled powder, comprising the following steps: firstly, subjecting the original recycled aggregate to particle shaping and mechanical grinding operations in sequence to obtain recycled aggregate and surface mortar; then, performing image recognition on the recycled aggregate to obtain a first recycled coarse aggregate whose surface mortar content meets the requirements; if the surface mortar content of the recycled aggregate is less than a threshold value, carbonizing and enhancing the first recycled aggregate to obtain a second recycled coarse aggregate that meets the strength requirements; finally, performing mortar grinding and carbonizing and enhancing operations on the surface mortar in sequence to obtain recycled powder.

[0028] The present invention integrates two production processes of recycled aggregate and recycled powder, reduces cumbersome process flow, saves time and energy consumption in producing recycled products. In addition, the present invention significantly improves the quality of aggregate in the production process of recycled aggregate, and solves the problems of high water absorption and high porosity of recycled aggregate.

[0029] In the technical solution of the present invention, the mortar removed from the surface of the recycled aggregate is recycled and utilized to produce recycled powder, thereby improving the overall utilization rate of construction solid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0031] Figure 1 This is a flow chart of the integrated process method of recycled aggregate and recycled powder according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0034] Embodiment 1

[0035] like Figure 1 As shown, this embodiment provides an integrated process method for producing recycled aggregate and recycled powder, including the following steps:

[0036] The original recycled aggregate is successively subjected to particle shaping and mechanical grinding operations to obtain recycled aggregate and surface mortar;

[0037] Performing image recognition on the recycled aggregate to obtain a first recycled coarse aggregate whose surface mortar content meets the requirements; if the surface mortar content of the recycled aggregate is less than a threshold value, carbonizing and strengthening the first recycled aggregate to obtain a second recycled coarse aggregate that meets the strength requirements;

[0038] The surface mortar is subjected to mortar grinding and carbonization strengthening operations in sequence to obtain regenerated powder.

[0039] Furthermore, the process of particle shaping of the original recycled aggregate includes: screening, drying and mixing the original recycled aggregate, then subjecting it to pressure, shear and thermal action through a particle forming mechanism to form a preliminary particle structure, and finally trimming and shaping it through a particle shaping device to obtain a recycled aggregate with a surface shape that meets the requirements.

[0040] Specifically, the purpose of particle shaping is to obtain a suitable surface shape. The particle shaping process is a method of processing raw materials into a specific shape and size, which can not only improve the quality and controllability of the product, but also improve production efficiency and reduce energy consumption. Therefore, particle shaping eliminates or weakens the edges and corners of the mortar on the surface of the recycled aggregate, so that it can better enter the mechanical crushing step, but the particle size of the recycled aggregate should not be greater than 63mm, and the shaper power cannot be too large to avoid destroying the strength of the recycled aggregate.

[0041] Furthermore, the process of mechanical grinding includes: putting the recycled aggregate with surface shape meeting the requirements into a mechanical device for grinding, and then separating the ground recycled aggregate by a fan to obtain recycled aggregate and surface mortar.

[0042] Specifically, the shaped recycled aggregate enters the mechanical grinding box, and is first pre-ground at the lowest mechanical power. If the grinding condition is good, continue grinding. If the grinding condition is poor, add grinding aids. Then, the mechanical power is adjusted according to the required aggregate particle size to grind the recycled aggregate. While grinding the recycled aggregate, turn on the fan to blow the fallen surface mortar to the side collection box.

[0043] In this embodiment, the purpose of mechanical grinding is to remove the surface mortar. The mechanical grinding process refers to the process of mechanically crushing the surface mortar of the recycled aggregate, mainly to reduce the particle size and increase the uniformity of its shape, and the surface mortar is initially removed. The crushing method is selected to grind to reduce damage to the aggregate.

[0044] Furthermore, the process of performing image recognition on the recycled aggregate to obtain the first recycled coarse aggregate with surface mortar content meeting the requirements includes: setting a surface mortar content threshold, and screening out the first recycled coarse aggregate with surface mortar content meeting the requirements through image recognition technology and the surface mortar content threshold.

[0045] Specifically, the image recognition technology is used to check whether the mortar residue on the surface of the recycled aggregate meets the use requirements.

[0046] Furthermore, the process of carbonizing and strengthening the first recycled aggregate to obtain a second recycled coarse aggregate that meets the strength requirements includes: placing the first recycled aggregate into a carbonization box, and carbonizing the surface mortar of the first recycled aggregate by carbon dioxide gas to obtain a second recycled coarse aggregate that meets the strength requirements.

[0047] Specifically, the carbonization box process refers to inputting the recycled aggregate whose surface mortar residue does not meet the use requirements into the carbonization box to solidify the surface mortar, so that the whole meets the strength requirements and can be put into use; but the carbonization box needs to meet the airtightness requirements. Among them, after the recycled aggregate enters the carbonization box, it is first ensured that the space environment is closed, and then carbon dioxide gas is introduced for carbonization to solidify the surface mortar.

[0048] In this embodiment, a small amount of carbonized recycled aggregate is taken for strength test. If the requirements are met, the aggregate is output; if not, secondary carbonization is performed.

[0049] Furthermore, the process of grinding the surface mortar includes: feeding the surface mortar into a regenerated powder grinding box, grinding the surface mortar according to finenesses required by different requirements, and obtaining ground surface mortar.

[0050] Furthermore, the process of carbonizing and strengthening the ground surface mortar includes: placing the ground surface mortar into a carbonization box, and carbonizing the ground surface mortar with carbon dioxide gas to obtain regenerated powder.

[0051] Embodiment 2

[0052] This embodiment provides an integrated process system for the production of recycled aggregate and recycled powder and carbonization enhancement, which is used to implement the integrated process method for the production of recycled aggregate and recycled powder described in Example 1. The system includes:

[0053] The material processing module is used to process the original recycled aggregate through particle shaping and mechanical grinding operations in sequence to obtain recycled aggregate and surface mortar;

[0054] A recycled aggregate production module is used to perform image recognition on the recycled aggregate to obtain a first recycled coarse aggregate whose surface mortar content meets the requirements; if the surface mortar content of the recycled aggregate is less than a threshold, carbonization enhancement is performed on the first recycled aggregate to obtain a second recycled coarse aggregate that meets the strength requirements;

[0055] The regenerated powder production module is used to perform mortar grinding and carbonization strengthening operations on the surface mortar in sequence to obtain regenerated powder.

[0056] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An integrated process for the production of recycled aggregate and recycled powder, characterized in that: The following steps are involved: The original recycled aggregate is successively subjected to particle shaping and mechanical grinding operations to obtain recycled aggregate and surface mortar; Performing image recognition on the recycled aggregate to obtain a first recycled coarse aggregate whose surface mortar content meets the requirements; if the surface mortar content of the recycled aggregate is less than a threshold value, carbonizing and strengthening the first recycled aggregate to obtain a second recycled coarse aggregate that meets the strength requirements; The surface mortar is subjected to mortar grinding and carbonization strengthening operations in sequence to obtain regenerated powder.

2. The integrated process for producing recycled aggregate and recycled powder according to claim 1, characterized in that: The process of particle shaping of raw recycled aggregate includes: The original recycled aggregate is screened, dried and mixed, and then subjected to pressure, shear and thermal action through a particle forming mechanism to form a preliminary particle structure. Finally, it is trimmed and shaped through a particle shaping device to obtain recycled aggregate with a surface shape that meets the requirements.

3. The integrated process for producing recycled aggregate and recycled powder according to claim 2, characterized in that: The process of mechanical grinding includes: The recycled aggregate with surface shape meeting the requirements is put into a mechanical device for grinding, and then the ground recycled aggregate is separated by a fan to obtain recycled aggregate and surface mortar.

4. The integrated process for producing recycled aggregate and recycled powder according to claim 1, characterized in that: The process of performing image recognition on the recycled aggregate to obtain a first recycled coarse aggregate having a surface mortar content meeting the requirements comprises: A surface mortar content threshold is set, and the first recycled coarse aggregate having a surface mortar content that meets the requirement is screened out through image recognition technology and the surface mortar content threshold.

5. The integrated process for producing recycled aggregate and recycled powder according to claim 1, characterized in that: The process of carbonizing and strengthening the first recycled aggregate to obtain a second recycled coarse aggregate that meets the strength requirements includes: The first recycled aggregate is placed in a carbonization box, and the surface mortar of the first recycled aggregate is carbonized by carbon dioxide gas to obtain a second recycled coarse aggregate that meets the strength requirements.

6. The integrated process for producing recycled aggregate and recycled powder according to claim 1, characterized in that: The process of mortar grinding the surface mortar includes: The surface mortar is sent to a regenerated powder grinding box, and the surface mortar is ground according to the fineness required by different requirements to obtain a ground surface mortar.

7. The integrated process for producing recycled aggregate and recycled powder according to claim 6, characterized in that: The process of carbonization enhancement of the ground surface mortar includes: The ground surface mortar is put into a carbonization box, and the ground surface mortar is carbonized by carbon dioxide gas to obtain regenerated powder.

8. An integrated process system for the production of recycled aggregate and recycled powder, characterized in that: The integrated process method for producing recycled aggregate and recycled powder according to any one of claims 1 to 7 comprises: The material processing module is used to process the original recycled aggregate through particle shaping and mechanical grinding operations in sequence to obtain recycled aggregate and surface mortar; A recycled aggregate production module is used to perform image recognition on the recycled aggregate to obtain a first recycled coarse aggregate whose surface mortar content meets the requirements; if the surface mortar content of the recycled aggregate is less than a threshold, carbonization enhancement is performed on the first recycled aggregate to obtain a second recycled coarse aggregate that meets the strength requirements; The regenerated powder production module is used to perform mortar grinding and carbonization strengthening operations on the surface mortar in sequence to obtain regenerated powder.

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