Combined sand making process based on building aggregate rod mill and column crusher

Abstract

The invention relates to the field of building material production, and discloses a combined sand making process based on a building aggregate rod mill and a column crusher, which comprises the following steps: sand making raw material pretreatment: dividing a building aggregate raw material into a rod mill feeding raw material of 310 mm and a column crusher feeding raw material of 316 mm; sand making, wherein the raw materials of 310 mm are fed into a rod mill to be crushed, and the raw materials of 316 mm are fed into a column crusher to be crushed, rubbed and screened; sand material treatment, wherein the crushed machine-made sand is subjected to grading and dewatering treatment through a wheel type sand washing machine; and machine-made sand finished product treatment. Through combined use of the rod mill and the column crusher, the sand forming rate and the particle size control precision are improved, and the stable quality of finished sand is ensured; an intelligent automatic control system is adopted, process parameters are monitored and adjusted in real time, and equipment faults and operation errors are reduced; a wastewater treatment system is integrated, so that efficient recovery and cyclic utilization of wastewater are realized, water resource consumption is reduced, and environmental protection performance is improved.

Description

Technical Field

[0001] The invention relates to the field of building material production, in particular to a combined sand making process based on a building aggregate rod mill and a column crusher. Background Art

[0002] Sand making is an indispensable part of the production of building aggregates. It is used to process large pieces of natural rocks, ores, etc. into machine-made sand that meets construction standards through crushing, screening and other steps. Machine-made sand is widely used in the production of building materials such as concrete and mortar. There are strict requirements on the particle size, shape, moisture content and other parameters of the sand. With the development of the construction industry, the market demand for high-quality machine-made sand continues to increase, and the optimization and efficiency improvement of the sand making process have become the focus of the industry.

[0003] At present, most of the existing sand making processes use separate equipment such as vertical shaft impact crushers or rod mills for sand making. These equipment break the raw materials into smaller particles by impacting and grinding the materials, and complete the cleaning and particle size classification of the machine-made sand through sand washing and screening processes. This process can achieve a certain sand making efficiency and can guarantee the particle size and quality of the machine-made sand to a certain extent. It is suitable for the production needs of small and medium-sized building materials.

[0004] However, the existing sand making process has some shortcomings. First, the crushing efficiency of a single device is limited, and it is impossible to fully improve the sand making rate and optimize the particle size control accuracy of the machine-made sand, resulting in unstable quality of the finished sand; second, the traditional process relies on manual monitoring and adjustment of equipment parameters, which is prone to operational errors, resulting in reduced production efficiency and equipment failure; in addition, the existing wastewater treatment system is not perfect and cannot efficiently recycle production wastewater, resulting in serious waste of water resources and low environmental protection performance. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a combined sand making process based on a rod mill and a column crusher for building aggregates. The present invention improves the sand making rate and the particle size control accuracy through the combined use of the rod mill and the column crusher, thereby ensuring the stable quality of the finished sand; adopts an intelligent automatic control system to monitor and adjust process parameters in real time, thereby reducing equipment failures and operating errors; integrates a wastewater treatment system to achieve efficient recovery and recycling of wastewater, thereby reducing water resource consumption and improving environmental protection performance.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a combined sand making process based on a building aggregate rod mill and a column crusher, comprising the following steps:

[0007] Pretreatment of sand making raw materials: The building aggregate raw materials are divided into 310mm rod mill feed raw materials and 316mm column crusher feed raw materials;

[0008] Sand making: The 310mm raw material is sent to the rod mill for crushing, and the 316mm raw material is sent to the column crusher for crushing, kneading and screening;

[0009] Sand material processing: The crushed machine-made sand is graded and dehydrated by a wheel sand washer;

[0010] Finished product processing of machine-made sand: qualified machine-made sand after sand washing enters the finished product warehouse, and unqualified machine-made sand is returned for recycling and crushed again;

[0011] Automatic control: The automatic control system is used to control the feeding, crushing, screening, sand washing and other links in the sand making process;

[0012] Wastewater treatment: The wastewater generated in the production process is treated through the wastewater treatment system to achieve wastewater recycling and zero discharge.

[0013] Preferably, the sand making raw material pretreatment specifically comprises the following steps:

[0014] According to the equipment requirements, the building aggregate raw materials are divided into rod mill raw materials and column crusher raw materials with different particle size ranges;

[0015] The raw materials are transported to their respective raw material bins through underground corridors and vibrating feeders;

[0016] The raw material warehouse adopts a closed structure to reduce external pollution.

[0017] Preferably, the sand making specifically comprises the following steps:

[0018] Rod mill crushing: 3-10mm building aggregates are fed into the rod mill, which grinds and crushes the raw materials to form machine-made sand with smaller particle size;

[0019] Crushing with column crusher: 3-16mm building aggregates are fed into the column crusher, which crushes the raw materials by rolling, kneading and shearing. The qualified sand after crushing is discharged after screening;

[0020] The crushed machine-made sand is preliminarily screened, and the machine-made sand that does not meet the particle size requirements enters the circulation treatment system.

[0021] Preferably, the sand material processing specifically comprises the following steps:

[0022] The crushed machine-made sand is graded by a wheel sand washer;

[0023] The dehydration process is used to control the moisture content of machine-made sand within the industry standard range;

[0024] The machine-made sand after grading is stored according to the particle size. The qualified machine-made sand enters the finished product warehouse, and the unqualified machine-made sand enters the circulation processing system through the conveyor belt for further crushing.

[0025] Preferably, the finished machine-made sand processing specifically includes the following steps:

[0026] The qualified machine-made sand after classification is transported to the finished product warehouse for storage through a belt conveyor;

[0027] The moisture content of machine-made sand is tested through an automatic control system to ensure that the moisture content of machine-made sand meets the construction standards;

[0028] The finished machine-made sand is transported out of the warehouse via a discharging belt conveyor.

[0029] Preferably, the automatic control specifically comprises the following steps:

[0030] Set the operating parameters of the automation control system and set the linkage combination of equipment according to the requirements of the production process;

[0031] The control system monitors the operating status of each link of the equipment in real time and automatically adjusts the feeding speed, crushing speed and classification frequency;

[0032] The automation control system performs linkage control and exception handling of equipment through data collection and feedback mechanism.

[0033] Preferably, the wastewater treatment specifically comprises the following steps:

[0034] Wastewater collection: Collect wastewater containing solid particles generated during the production process into the wastewater treatment system;

[0035] Water quality analysis: Real-time analysis of solid particles and pollutant concentrations in wastewater through intelligent control systems;

[0036] Automatic dosing: automatically add treatment chemicals to wastewater based on water quality analysis results;

[0037] Filtration treatment: The wastewater is filtered through a sedimentation tank and a clear water tank at multiple stages, and the solid particles are precipitated and then pass through a filter press to form a mud cake;

[0038] Recycling: The treated clean water re-enters the sand production process through the clean water tank, and the untreated solid particles are transported out through the mud cake treatment system.

[0039] Preferably, the wastewater treatment system monitors the wastewater treatment process in real time through an intelligent control system, and adjusts the dosage according to changes in water quality to ensure that the wastewater treatment effect meets the recycling standard.

[0040] Preferably, the moisture content of the machine-made sand in the sand making process is controlled between 5% and 7%, ensuring that the quality of the finished machine-made sand meets the standard requirements of building materials.

[0041] Preferably, the automated control system also includes a data feedback mechanism, which automatically detects equipment failures occurring during the production process through data collection and issues real-time alarms to ensure the stability of equipment operation.

[0042] The present invention provides a combined sand making process based on a rod mill and a column crusher for building aggregates. It has the following beneficial effects:

[0043] 1. The present invention optimizes the crushing and sand making process of building aggregates through the combined use of rod mill and column crusher, improves the sand formation rate and particle size control accuracy of machine-made sand, and the quality of finished machine-made sand is stable, which meets the demand of the construction industry for high-quality sand materials and reduces the overall energy consumption.

[0044] 2. The present invention adopts an intelligent automatic control system to monitor the operating status of production equipment in real time, automatically adjust process parameters such as crushing and screening, ensure efficient and stable production process, reduce equipment failures and human operation errors, and improve the overall efficiency of the sand making production line.

[0045] 3. The present invention ensures the accuracy of wastewater treatment through an integrated wastewater treatment system based on real-time water quality monitoring and automatic dosing adjustment, realizes the recycling of wastewater, reduces water resource consumption and pollution emissions, meets environmental protection requirements, and achieves green production goals. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a flow chart of the preparation process of the present invention. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Please see attached Figure 1 The embodiment of the present invention provides a combined sand making process based on a building aggregate rod mill and a column crusher, comprising the following steps:

[0049] Pretreatment of sand making raw materials: The building aggregate raw materials are divided into 310mm rod mill feed raw materials and 316mm column crusher feed raw materials. This step effectively ensures that the subsequent sand making equipment can process raw materials of appropriate particle size through strict screening and classification, avoiding equipment damage or poor sand making effect caused by raw materials that are too large or too small. This step can optimize the working efficiency of subsequent crushing equipment, while reducing the risk of overload operation and failure of equipment, ensuring the continuity and efficiency of the sand making process;

[0050] Sand making: The 310mm raw material is sent to the rod mill for crushing, and the 316mm raw material is sent to the column crusher for crushing, kneading and screening. Through this combined crushing process, the sand formation rate of machine-made sand can be improved, the quality of machine-made sand can be ensured, and the production efficiency of the crushing process can be improved;

[0051] Sand material processing: The crushed machine-made sand is graded and dehydrated by a wheeled sand washer. The grading and dehydration processes can significantly improve the physical properties of the machine-made sand, ensure the quality and reliability of the sand in construction applications, and avoid the problem of over-wetting of the sand or substandard particle size.

[0052] Finished machine-made sand processing: Qualified machine-made sand after sand washing enters the finished product warehouse, and unqualified machine-made sand is returned for recycling and crushing again. The recycling of unqualified machine-made sand not only improves resource utilization, but also increases the output rate of finished machine-made sand, reduces raw material waste, and realizes green production;

[0053] Automatic control: The automatic control system is used to control the feeding, crushing, screening, sand washing and other links in the sand making process. The application of the automatic control system has greatly improved the automation level of sand making production, reduced manual intervention, and significantly improved the stability and efficiency of the overall production;

[0054] Wastewater treatment: The wastewater generated during the production process is treated through the wastewater treatment system to achieve wastewater recycling and zero discharge. The wastewater treatment system not only reduces water resource consumption in production, but also achieves wastewater recycling, reduces environmental pollution, and meets the environmental protection requirements of green production.

[0055] Please see attached Figure 1 In a preferred embodiment of the present invention, the pretreatment of sand making raw materials specifically includes the following steps:

[0056] According to the equipment requirements, the building aggregate raw materials are divided into rod mill raw materials and column crusher raw materials of different particle size ranges according to the particle size. In the pretreatment stage of sand making raw materials, the building aggregate raw materials are first classified according to the equipment requirements. According to the different particle sizes, the raw materials are divided into raw materials in the range of 310mm suitable for rod mill processing and raw materials in the range of 316mm suitable for column crusher processing. Among them, the rod mill is suitable for processing materials with finer particle sizes and can effectively realize fine grinding of particles; while the column crusher is suitable for materials with larger particle sizes and can efficiently crush larger particle raw materials by kneading and rolling. Through this classification and processing, the rod mill and column crusher can each process the raw material particle size that is most suitable for their processing, maximize the working efficiency of the equipment, reduce equipment wear, and ensure the stability and continuity of the entire sand making process;

[0057] Raw materials are transported to their respective raw material bins through corridors and vibrating feeders. Stable transportation of raw materials is ensured through corridors and vibrating feeders, so that each device can maintain uniform feeding, avoiding reduced production efficiency and equipment damage caused by uneven feeding, and ensuring the continuous stability of equipment operation;

[0058] The raw material warehouse adopts a closed structure to reduce external pollution. The design of the closed structure not only prevents the raw materials from being exposed to the external environment and reduces the possibility of dust leakage, but also effectively protects the raw materials from the influence of the external environment (such as rain, wind and dust) during storage, ensuring the cleanliness of the raw materials, thereby improving the cleanliness of the production line, reducing dust emissions, and meeting environmental protection requirements.

[0059] Please see attached Figure 1 In a preferred embodiment of the present invention, sand making specifically comprises the following steps:

[0060] Rod mill crushing: 3-10mm building aggregates are fed into the rod mill, which grinds and crushes the raw materials to form machine-made sand with smaller particle sizes. First, building aggregates with a particle size of 3-10mm enter the rod mill through the conveying equipment. The rod mill adopts the principle of grinding and grinding. The grinding rods in the cylinder repeatedly grind and collide the aggregates, gradually crushing the larger particles of raw materials into machine-made sand with smaller particle sizes. In this process, the operating speed of the rod mill and the density of the grinding rods are properly designed, which can effectively avoid over-grinding, make the aggregate crushing effect uniform, and produce a reasonable particle size distribution of the machine-made sand. In addition, the grinding process avoids the generation of excessive fine powder, further improving the quality of the sand and the crushing efficiency;

[0061] Crushing with column crusher: 3-16mm construction aggregates are fed into the column crusher, which crushes the raw materials by rolling, kneading and shearing. The qualified sand after crushing is discharged after screening. The column crusher can not only handle materials with larger particle sizes, but also improve the particle shape of machine-made sand through kneading and shaping, making the particles of machine-made sand closer to round or elliptical, which meets the requirements of construction sand. In addition, the column crusher also has an automatic screening function. Qualified machine-made sand is automatically discharged through the screening device during the crushing process. The crushing process of the column crusher can realize the combination of multiple crushing methods to ensure the efficient crushing of large-size raw materials. At the same time, the particle shape of machine-made sand is optimized, thereby improving the quality of machine-made sand and meeting the high requirements of the construction industry for the particle shape and particle uniformity of machine-made sand;

[0062] The crushed machine-made sand is preliminarily screened, and the machine-made sand that does not meet the particle size requirements enters the circulation treatment system. Through preliminary screening and circulation treatment, the particle size quality of the machine-made sand is ensured, and unqualified materials are prevented from directly entering the finished product, thereby improving the overall output rate of machine-made sand, reducing raw material waste, and optimizing resource utilization efficiency.

[0063] Please see attached Figure 1 In a preferred embodiment of the present invention, the sand material processing specifically includes the following steps:

[0064] The crushed machine-made sand is graded by a wheel sand washing machine. After crushing, the machine-made sand will first be graded by a wheel sand washing machine. The wheel sand washing machine mainly separates impurities, dust and materials with too small particle sizes in the machine-made sand through the impact of water flow and the rotation of the material, thereby ensuring the cleanliness of the machine-made sand. At the same time, through the action of gravity and centrifugal force, the wheel sand washing machine can preliminarily classify machine-made sand of different particle sizes. Larger particles settle to the bottom of the sand washing machine, and fine particles are discharged with the water flow, thus achieving effective separation of sand materials of different particle sizes. This step can not only remove impurities in the machine-made sand, but also improve the surface quality of the machine-made sand through water washing, making the machine-made sand cleaner and the particles more rounded, meeting the requirements of the construction industry;

[0065] The dehydration process is used to control the moisture content of machine-made sand within the industry standard range. After grading, the machine-made sand after sand washing has a high moisture content and is not suitable for direct use or storage. The dehydration process is achieved through a dehydration screen or a centrifugal dehydrator. The gravity and screening effect of the material are used to remove excess water from the machine-made sand to ensure that the moisture content meets the industry standard, thereby avoiding quality problems caused by excessive water content and improving the storage and transportation efficiency of the sand.

[0066] The machine-made sand after grading treatment is stored according to particle size. Qualified machine-made sand enters the finished product warehouse, and unqualified machine-made sand enters the circulation treatment system through the conveyor belt for re-crushing. Through the graded storage of qualified machine-made sand and the circulation treatment of unqualified machine-made sand, the entire process can maximize the utilization of raw materials, improve the output and quality of machine-made sand, reduce the waste of raw materials, and increase resource utilization efficiency.

[0067] Please see attached Figure 1 In a preferred embodiment of the present invention, the finished machine-made sand processing specifically includes the following steps:

[0068] The qualified machine-made sand after classification is transported to the finished product warehouse for storage through the belt conveyor. The efficient transportation of the belt conveyor and the classified storage in the finished product warehouse ensure the quality stability of the machine-made sand during storage and transportation, prevent external pollution and particle breakage, and ensure that the sand meets the construction standard requirements;

[0069] The moisture content of machine-made sand is tested through the automatic control system to ensure that the moisture content of machine-made sand meets the construction standards. Through the humidity sensor installed in the conveyor belt or finished product warehouse, the system can accurately detect the moisture content of machine-made sand and transmit the data to the central control system. Once the moisture content of machine-made sand is detected to be high, the automatic control system will issue an alarm and make corresponding adjustments to the production line, such as extending the dehydration time of the sand or reducing the probability of materials with excessive humidity entering the finished product warehouse. The automated moisture content detection system ensures that the moisture content of machine-made sand is always within the construction standard range, improves the performance of machine-made sand, avoids construction quality problems caused by excessive moisture, and reduces manual operation errors through automated detection;

[0070] The finished machine-made sand is transported out of the warehouse by the discharging belt conveyor. The efficient conveying and automated control system of the discharging belt conveyor ensure that the discharging process of the machine-made sand is fast and orderly, avoiding material loss, and improving the transparency and traceability of production management through data recording, ensuring that the delivered machine-made sand is of qualified quality.

[0071] Please see attached Figure 1 In a preferred embodiment of the present invention, the automatic control specifically includes the following steps:

[0072] Set the operating parameters of the automation control system and set the linkage combination of the equipment according to the requirements of the production process. The automation control system links and combines various equipment (such as rod mill, column crusher, sand washer, etc.) through the pre-set operating parameters to ensure that each equipment works at the predetermined speed and frequency, thereby optimizing the overall operating efficiency of the production line. By pre-setting the operating parameters of the automation control system, each link in the production process can be accurately controlled to ensure the stability of equipment operation and the continuity of the process flow, greatly improving production efficiency and reducing manual intervention;

[0073] The control system monitors the operating status of each link of the equipment in real time, and automatically adjusts the feed speed, crushing speed and classification frequency. When it detects that the equipment is abnormal, the control system will immediately issue an alarm to prompt the operator to check and maintain. At the same time, the system can also automatically adjust the operating parameters of the equipment. For example, when it detects that the feed is too much or too little, it automatically adjusts the feed speed; when the crushing load is too high, it automatically reduces the speed of the crusher to avoid equipment damage. By monitoring the operating status of the equipment in real time, the automated control system can ensure that the production line operates in an efficient and stable state, reduce the occurrence of equipment failures, extend the service life of the equipment, and improve the safety and stability of production;

[0074] The automated control system uses data collection and feedback mechanisms to perform linkage control and abnormality processing on the equipment. During the production process, the system will continuously collect various data on the operation of the equipment, including key indicators such as the equipment's working efficiency, energy consumption, particle size distribution of the sand material, and sand formation rate. The system will analyze the collected data and automatically feedback to the control center according to the preset standards. Once the system detects an abnormal situation or certain parameters fail to meet the set production standards, the feedback mechanism will automatically start and adjust each link in the production process. For example, if the particle size of the finished sand does not meet the requirements, the system can automatically adjust the crushing speed or screening frequency to ensure that the quality of the machine-made sand meets the standards. If there is a risk of equipment failure or downtime, the system can take timely measures to avoid production interruptions, thereby reducing human operating errors, improving the level of intelligent production, and ensuring the efficiency of machine-made sand production and the stability of quality.

[0075] Please see attached Figure 1 In a preferred embodiment of the present invention, the wastewater treatment specifically comprises the following steps:

[0076] Wastewater collection: The wastewater containing solid particles generated during the production process is collected into the wastewater treatment system. In the production process of machine-made sand, a large amount of wastewater containing solid particles will be generated. These wastewaters mainly come from the sand washing and dehydration processes. The wastewater is collected and concentrated into the primary wastewater pool of the wastewater treatment system through drainage pipes. The collection system is designed as a closed structure to prevent wastewater from leaking or polluting the external environment during transmission. In addition, the system can efficiently collect wastewater from different stages to ensure that the wastewater can be treated uniformly and improve treatment efficiency. The centralized collection of wastewater can ensure that the wastewater does not leak and prevent pollution to the environment. It also improves the wastewater recovery efficiency and optimizes the subsequent treatment process;

[0077] Water quality analysis: The solid particles and pollutant concentrations in the wastewater are analyzed in real time through the intelligent control system. After the wastewater enters the treatment system, the water quality is first monitored and analyzed in real time through the intelligent control system. The system is equipped with water quality sensors that can accurately detect the solid particle content, suspended matter, chemical oxygen demand (COD) and other pollutant concentrations in the wastewater. By analyzing these parameters, the system can determine the degree of pollution of the wastewater, determine whether it needs further treatment, and select the appropriate treatment method and dosage of the agent. Through the intelligent water quality analysis system, the pollutant concentration in the wastewater can be monitored in real time to ensure the pertinence and effectiveness of wastewater treatment, while reducing the waste of agents and improving treatment efficiency;

[0078] Automatic dosing: According to the results of water quality analysis, treatment agents are automatically added to the wastewater. The automatic dosing system can not only flexibly adjust the amount of agents according to changes in water quality, improve the accuracy of wastewater treatment, but also avoid human operation errors, ensure the rationality of agent dosage, reduce agent waste, and reduce treatment costs. Automatic dosing is an existing technology and will not be described in detail in this article.

[0079] Filtration treatment: The wastewater is filtered through a sedimentation tank and a clear water tank at multiple stages. After the solid particles settle, they are passed through a filter press to form a mud cake. The wastewater treated with the dosing agent enters the sedimentation tank. At this stage, larger solid particles will settle to the bottom of the tank by gravity, while smaller suspended particles will be further separated in the subsequent clear water tank. The solid particles form mud in the sedimentation tank, and the mud enters the filter press through a conveying device for solid-liquid separation. The filter press squeezes water out of the mud to form a mud cake with a low water content, which is convenient for subsequent treatment or transportation. The clean water enters the water storage tank and waits for reuse. The multi-stage filtration treatment system effectively removes solid particles and suspended matter in the wastewater, ensuring that the quality of the clean water meets the recycling standards. At the same time, the solid waste is effectively separated by the filter press, reducing secondary pollution in wastewater treatment;

[0080] Recycling: The treated clean water re-enters the sand production process through the clean water tank, and the untreated solid particles are transported out through the mud cake treatment system. The clean water after sedimentation, filtration and filter pressing is transported to the clean water tank, and then re-enters the sand production process through the water pipeline for recycling. This recycling water not only greatly reduces the consumption of new water, but also effectively reduces the water resource cost of the entire sand making process.

[0081] Please see attached Figure 1In a preferred embodiment of the present invention, the wastewater treatment system monitors the wastewater treatment process in real time through an intelligent control system, and adjusts the dosage according to the changes in water quality to ensure that the wastewater treatment effect meets the recycling standard. The real-time monitoring function can not only identify changes in water quality, but also identify any potential treatment problems, such as water quality deterioration or excessive pollutants. The system can issue an alarm at the first time and take necessary measures to avoid substandard treatment effects. Real-time monitoring ensures the safety and efficiency of the wastewater treatment system throughout the operation process, avoids the occurrence of potential problems, ensures the continuous stability of the treatment process, reduces human intervention, and improves the degree of automation. On the basis of real-time monitoring, the intelligent control system can dynamically analyze the changes in wastewater quality. The dynamic analysis function of water quality makes wastewater treatment more flexible and accurate, and makes adjustments according to real-time changes in water quality to ensure that the treatment effect of wastewater is always maintained at the best level, avoiding efficiency reduction or excessive discharge due to water quality fluctuations during the treatment process.

[0082] Please see attached Figure 1 In a preferred embodiment of the present invention, the moisture content of the machine-made sand in the sand making process is controlled between 5% and 7%, ensuring that the quality of the finished machine-made sand meets the standard requirements of building materials. By using high-efficiency dehydration equipment, such as a dehydration screen or a centrifugal dehydrator, excess water in the machine-made sand is removed. The equipment separates the water in the sand particles by vibrating screening or high-speed centrifugal force to ensure that the moisture content of the finished sand meets the predetermined range. After the dehydration process is completed, the automatic control system will monitor the moisture content of the machine-made sand in real time through the humidity sensor. Through the precise dehydration process, the moisture content of the machine-made sand can be controlled between 5% and 7%, avoiding construction quality problems caused by excessively high moisture content, ensuring that the physical properties of the machine-made sand meet the use requirements of building materials, if the moisture content of the machine-made sand exceeds 7%, the system will automatically adjust the operating parameters of the dehydration equipment and extend the processing time until the moisture content meets the standard. Real-time monitoring of the moisture content ensures the quality control of the machine-made sand, avoids warehouse delays or quality problems caused by unqualified moisture content, and improves production efficiency and the qualified rate of finished sand.

[0083] Please see attached Figure 1In a preferred embodiment of the present invention, the automatic control system also includes a data feedback mechanism, which automatically detects equipment failures that occur during the production process through data collection and issues real-time alarms to ensure the stability of equipment operation. The data collection and fault detection functions ensure that potential equipment operation problems can be discovered early to avoid damage to the equipment due to excessive load or abnormal operation, and to ensure the continuity and stability of the production line. Once an equipment failure is detected, the automatic control system will immediately issue an alarm to notify the operator to take corresponding maintenance measures. The alarm signal can be conveyed in a variety of ways, such as through an on-site sound and light alarm device, or through a remote notification function connected to the central control system to send the alarm information to the mobile device of the relevant personnel. The real-time alarm mechanism shortens the fault response time, enables the operator to quickly handle the problem, reduces downtime, ensures the stability of production and the service life of the equipment, and through the automatic diagnosis and recording functions, not only improves the efficiency of fault handling, but also provides data support for equipment maintenance, helps managers formulate preventive maintenance plans, reduces unexpected downtime, and improves production efficiency.

[0084] In order to better understand the present invention, the above contents are described in detail below in conjunction with specific embodiments.

[0085] Example 1: Combined sand making process based on standard process parameters

[0086] In this embodiment, the combined sand making process of the construction aggregate rod mill and column crusher is operated according to standard process parameters and is suitable for general construction aggregate sand making production. The specific process is as follows:

[0087] Raw material pretreatment: The raw materials are divided into 310mm rod mill feed and 316mm column crusher feed, and transported to their respective equipment through vibrating feeders.

[0088] Crushing process: Rod mill is used to crush smaller-sized building aggregates, and column crusher is used to rub and crush larger-sized raw materials. The crushed sand is graded and dehydrated by wheel sand washing machine.

[0089] Sand material processing: Qualified machine-made sand after classification enters the finished product warehouse, and the moisture content is controlled at 5% to 7%. The automated system monitors the moisture content to ensure the quality of the finished product.

[0090] Wastewater treatment: Wastewater is monitored and analyzed through an intelligent system, and the water quality is automatically added and multi-stage filtered. The treated clean water is reused in the sand making process to form a closed loop.

[0091] Effect: This standard embodiment is suitable for the production of common building materials, has the advantages of high efficiency, low energy consumption and high quality of finished machine-made sand, and meets the general demand for machine-made sand in the construction industry.

[0092] Example 2: High-efficiency and low-water consumption sand making process

[0093] This embodiment is mainly applicable to areas with water shortage. While ensuring efficient sand making, the process pays special attention to saving water resources.

[0094] Raw material processing and crushing: As in Example 1, rod mill and column crusher were used to process building aggregates of different particle sizes.

[0095] Sand material processing and dehydration: The operating parameters of the dehydrator are optimized in the dehydration stage. By increasing the working frequency of the dehydration screen and extending the residence time of the material, the moisture content of the machine-made sand is controlled below 5%, further reducing the residual moisture in the sand.

[0096] Wastewater treatment and reuse: The wastewater treatment system greatly improves the water purification efficiency by strengthening water quality monitoring and dosing control. The water in the clear water tank is filtered multiple times and reused in multiple rounds of sand making process, which greatly reduces the consumption of new water.

[0097] Effect: The most significant feature of this embodiment is its remarkable water-saving effect. The water consumption is reduced by about 30% compared with the standard process, while maintaining the quality of the finished product of machine-made sand. It is particularly suitable for areas with tight water resources.

[0098] Example 3: Intelligent fully automatic sand making process

[0099] This embodiment integrates an advanced intelligent control system and is suitable for sand production lines with high precision requirements. The process features full-process automated monitoring and intelligent management, which reduces manual operations and improves production efficiency.

[0100] Intelligent raw material pretreatment: The particle size and quality of raw materials are monitored in real time through the intelligent sensor system, and the feeding speed of the vibrating feeder is automatically adjusted to ensure uniform load on each device.

[0101] Crushing and grading: The operating parameters of the rod mill and column crusher are adjusted in real time by the central control system. The system automatically adjusts the crushing speed and grading frequency according to production needs to optimize the sand production rate.

[0102] Real-time monitoring and data feedback: The system is equipped with a data collection and feedback mechanism to record the operating status of the equipment in real time. If a fault is found, the system will automatically alarm and start the backup equipment to ensure uninterrupted production.

[0103] Wastewater treatment and emission control: Wastewater treatment also uses intelligent control to analyze water quality in real time and optimize the dosage. The clean water after wastewater treatment is monitored by a data monitoring system to ensure stable water quality and adjust the treatment plan in a timely manner.

[0104] Effect: This intelligent process significantly improves the automation level of sand production, reduces human intervention, and reduces the risk of operational errors. It is suitable for large-scale and efficient production needs and ensures the continuous supply of high-precision machine-made sand.

[0105] Example 4: Environmentally friendly combined sand making process

[0106] This embodiment focuses on the sand making process with high environmental protection requirements and is suitable for promotion in areas with strict environmental regulations.

[0107] Low dust raw material handling: During the raw material handling stage, closed vibrating feeders and closed conveyor belt systems are used to ensure that no dust pollution is generated during the transportation and handling process.

[0108] High-efficiency crushing and low-energy processing: Rod mill and column crusher adopt variable frequency speed regulation technology, which greatly reduces the energy consumption of equipment while ensuring crushing efficiency.

[0109] Wastewater and dust treatment: The wastewater treatment system has added high-efficiency filtration and wastewater zero discharge design, and all wastewater is completely reused in the sand making process after treatment. At the same time, the dust collection system collects the dust generated in the sand making process through high-efficiency dust removal equipment to avoid pollution.

[0110] Effect: This embodiment greatly reduces pollutant emissions in the production process, achieves zero wastewater emissions, and controls dust emissions within the environmental protection standards. It is a green sand making process that meets environmental protection requirements.

[0111] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined sand making process based on a rod mill and a column crusher for building aggregates, characterized in that: The following steps are involved: Pretreatment of sand making raw materials: The building aggregate raw materials are divided into 310mm rod mill feed raw materials and 316mm column crusher feed raw materials; Sand making: The 310mm raw material is sent to the rod mill for crushing, and the 316mm raw material is sent to the column crusher for crushing, kneading and screening; Sand material processing: The crushed machine-made sand is graded and dehydrated by a wheel sand washer; Finished product processing of machine-made sand: qualified machine-made sand after sand washing enters the finished product warehouse, and unqualified machine-made sand is returned for recycling and crushed again; Automatic control: The automatic control system is used to control the feeding, crushing, screening, sand washing and other links in the sand making process; Wastewater treatment: The wastewater generated in the production process is treated through the wastewater treatment system to achieve wastewater recycling and zero discharge.

2. A combined sand making process based on a rod mill and a column crusher for building aggregates according to claim 1, characterized in that: The sand making raw material pretreatment specifically comprises the following steps: According to the equipment requirements, the building aggregate raw materials are divided into rod mill raw materials and column crusher raw materials with different particle size ranges; The raw materials are transported to their respective raw material bins through underground corridors and vibrating feeders; The raw material warehouse adopts a closed structure to reduce external pollution.

3. The combined sand making process based on a rod mill and a column crusher for building aggregates according to claim 1 is characterized in that: The sand making specifically comprises the following steps: Rod mill crushing: 3-10mm building aggregates are fed into the rod mill, which grinds and crushes the raw materials to form machine-made sand with smaller particle size; Crushing with column crusher: 3-16mm building aggregates are fed into the column crusher, which crushes the raw materials by rolling, kneading and shearing, and the qualified sand materials are discharged after screening; The crushed machine-made sand is preliminarily screened, and the machine-made sand that does not meet the particle size requirements enters the circulation treatment system.

4. The combined sand making process based on a rod mill and a column crusher for building aggregates according to claim 1 is characterized in that: The sand material processing specifically comprises the following steps: The crushed machine-made sand is graded by a wheel sand washer; The dehydration process is used to control the moisture content of machine-made sand within the industry standard range; The machine-made sand after grading is stored according to the particle size. The qualified machine-made sand enters the finished product warehouse, and the unqualified machine-made sand enters the circulation processing system through the conveyor belt for further crushing.

5. The combined sand making process based on a rod mill and a column crusher for building aggregates according to claim 1 is characterized in that: The finished machine-made sand processing specifically includes the following steps: The qualified machine-made sand after classification is transported to the finished product warehouse for storage through a belt conveyor; The moisture content of machine-made sand is tested through an automatic control system to ensure that the moisture content of machine-made sand meets the construction standards; The finished machine-made sand is transported out of the warehouse via a discharging belt conveyor.

6. A combined sand making process based on a rod mill and a column crusher for building aggregates according to claim 1, characterized in that: The automatic control specifically comprises the following steps: Set the operating parameters of the automation control system and set the linkage combination of equipment according to the requirements of the production process; The control system monitors the operating status of each link of the equipment in real time and automatically adjusts the feeding speed, crushing speed and classification frequency; The automation control system performs linkage control and exception handling of equipment through data collection and feedback mechanism.

7. The combined sand making process based on a rod mill and a column crusher for building aggregates according to claim 1 is characterized in that: The wastewater treatment specifically comprises the following steps: Wastewater collection: Collect wastewater containing solid particles generated during the production process into the wastewater treatment system; Water quality analysis: Real-time analysis of solid particles and pollutant concentrations in wastewater through intelligent control systems; Automatic dosing: automatically add treatment chemicals to wastewater based on water quality analysis results; Filtration treatment: The wastewater is filtered through a sedimentation tank and a clear water tank at multiple stages, and the solid particles are precipitated and then pass through a filter press to form a mud cake; Recycling: The treated clean water re-enters the sand production process through the clean water tank, and the untreated solid particles are transported out through the mud cake treatment system.

8. The combined sand making process based on a rod mill and a column crusher for building aggregates according to claim 1 is characterized in that: The wastewater treatment system monitors the wastewater treatment process in real time through an intelligent control system, and adjusts the dosage according to changes in water quality to ensure that the wastewater treatment effect meets the recycling standard.

9. The combined sand making process based on a rod mill and a column crusher for building aggregates according to claim 1, characterized in that: The moisture content of the machine-made sand in the sand making process is controlled between 5% and 7%, ensuring that the quality of the finished machine-made sand meets the standard requirements of building materials.

10. The combined sand making process based on a rod mill and a column crusher for building aggregates according to claim 1, characterized in that: The automated control system also includes a data feedback mechanism, which automatically detects equipment failures that occur during the production process through data collection and issues real-time alarms to ensure the stability of equipment operation.

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