In the field of industrial solid waste resource utilization and new building materials production, ash brick machine is an important specialized equipment, mainly used to process industrial waste such as fly ash, slag, coal gangue, etc., and process them into various types of bricks to achieve the circular utilization of "turning waste into treasure". It is widely used in building materials factories, power plants, steel mills and other scenarios due to its strong adaptability and smooth production operation, becoming an important equipment for promoting green environmental protection and circular economy development. Many people have a vague understanding of the ash brick machine, and are not clear about its working principle, technical parameters, and application specifications. A deep understanding of this type of equipment can not only clarify its core role in solid waste treatment, but also provide scientific references for related production activities.

        From a definition perspective, the ash brick machine is a specialized mechanical equipment that uses industrial ash as the main raw material, combined with appropriate amounts of cementitious materials and additives, to produce brick products through processes such as crushing, batching, mixing, forming, and curing. Its core function is to transform industrial solid waste that was originally difficult to handle into building materials with practical value. This not only reduces the pollution caused by the accumulation of solid waste to the environment, but also saves natural resources such as clay and sand, which meets the relevant requirements of the national "waste free city" construction and the development of green building materials. Compared with traditional brick making equipment, the core advantage of ash brick making machine lies in the adaptability of raw materials, which can better handle various industrial waste residues, and the production process does not require high-temperature sintering (some processes require steam curing), with relatively low energy consumption and pollutant emissions.

        The overall structure of the ash brick machine is composed of multiple functional systems, which work together to ensure the orderly progress of the production process. There are slight differences in the structure of different types of equipment, but the core components are basically the same. It mainly includes raw material processing system, ingredient mixing system, molding system, conveying system, and maintenance system. Some intelligent models are also equipped with a central control system. The raw material processing system is responsible for crushing, screening, removing impurities, and adjusting the fineness of raw materials such as ash. The commonly used crushing equipment is a ball mill, whose cylinder speed is usually between 25r/min and 35r/min to ensure that the ash fineness meets production requirements; The ingredient mixing system accurately measures and mixes ash, cementitious materials, additives, and water in proportion. The commonly used forced mixer has a mixing shaft speed of 30r/min to 40r/min and a mixing time of 2min to 10min; The forming system is the core component, which often uses high-pressure vibration+static pressure forming or hydraulic static pressure forming processes to press the mixture into bricks. The common fully automatic hydraulic brick press has a static pressure of about 600t; The conveying system is responsible for transporting raw materials and bricks between various processes, while the curing system enhances the strength of bricks and ensures the quality of finished products through steam curing or natural curing.

        The technical parameters and production indicators of the ash brick machine have clear industry standards and actual production standards, and relevant data can be verified through industry information and production practice queries. In terms of production efficiency, the hourly output of different models of equipment varies greatly. Small models can produce thousands of standard bricks per hour, while large intelligent models can produce 9600-14000 standard bricks per hour. Some high-performance models can even produce 15800-19000 standard bricks per hour. In terms of molding specifications, various types of bricks can be produced by replacing modular molds. The standard brick specifications are 240mm × 115mm × 53mm, while the common specifications for PC imitation stone bricks include 400 × 200 × 60mm, 300 × 150 × 60mm, etc. The specifications for imitation stone curbstones can be adjusted between 500-700 × 120 × 350mm. The number of brick blanks that can be molded on each pallet varies depending on the specifications. For example, standard bricks can be molded into 56-72 pieces per board, while PC imitation stone bricks with 400 × 200 × 60mm specifications can be molded into 10 pieces per board.

        The raw material ratio is the key to the production of ash bricks, and the relevant ratios must strictly follow technical specifications to ensure the strength and durability of the finished product. Taking the production of coal catalytic gasification ash and steam pressed bricks as an example, there are clear requirements for the raw material ratio: coal catalytic gasification ash and slag account for 50% to 60%, aggregate accounts for no less than 30%, gypsum accounts for 1% to 2% of the sum of ash and aggregate, and water addition is 19% to 23% of all dry materials. At the same time, the quality of raw materials must meet the standards. The content of calcium silicoaluminate in coal catalytic gasification ash should be between 30% and 50%, the moisture content should be between 30% and 35%, the loss on ignition should not exceed 15%, and the residue on the 0.045mm square hole sieve should not exceed 55%; Gypsum shall not be lower than the third level requirements of GB/T5483, and the residue of 0.088mm square hole sieve shall not exceed 15%; The dry bulk density of aggregate shall not be less than 750kg/m ³, and the loss on ignition shall not exceed 20%. In the process of raw material measurement, the allowable error for silicon containing raw materials such as ash and aggregate shall not exceed ± 3%, for calcium containing raw materials such as gypsum it shall be ± 2%, and for water it shall be ± 2%.

        The production process of ash brick machine needs to follow corresponding technical regulations, and there are differences in the operating requirements of different processes. Among them, the steam pressing process is widely used, mainly divided into processes such as raw material crushing, batching, mixing, rolling, forming, steam curing, and finished product processing. The mixing process adopts a wheel roller mixer, with a speed controlled between 12r/min and 20r/min, and a mixing time of 5min to 7min to ensure uniform compaction of the mixture; After forming, steam curing treatment is required. The steam curing process is divided into four stages: static stop outside the kettle, heating, constant temperature, and cooling. The static stop outside the kettle lasts for 3-4 hours, and the temperature is maintained at 50 ℃~60 ℃; The heating stage lasts for 2-3 hours, with the brick temperature not exceeding 100 ℃ in the first 1-1.5 hours and not exceeding 180 ℃ after 1.5 hours; The constant temperature stage lasts for 6-7 hours, with the temperature controlled at 175 ℃± 5 ℃ and the pressure maintained at 0.8 MPa; The cooling stage lasts for 2 to 3 hours, and the outlet temperature should not exceed 80 ℃ above the ambient temperature. Partial non burning technology does not require steam curing, and achieves brick hardening and forming through natural curing or room temperature solidification.

        The application scenarios of ash brick machines are closely related to the amount of solid waste generated and the demand for building materials, mainly focused on the comprehensive utilization of industrial solid waste and the production of new building materials. In industrial enterprises such as power plants and steel mills, ash brick machines can directly process solid waste such as fly ash and slag generated during the production process, reducing the land occupied by solid waste accumulation and lowering environmental pollution risks; In building materials production enterprises, ash brick machines can use various solid wastes to produce various building materials such as standard bricks, permeable bricks, slope protection bricks, imitation stone bricks, etc., which are suitable for different scenarios such as residential buildings, industrial plants, municipal engineering, and garden construction. In addition, the performance of the bricks produced by the ash brick machine meets relevant standards, and the compressive strength of the finished product can reach over 30MPa. Some high-performance products have a compressive strength of MU20 or above, which can meet the needs of different building scenarios, while also possessing durability and ecology.

        The use, maintenance, and industry standards of ash brick machines are crucial for the service life and production safety of the equipment. At present, China has issued relevant local standards and industry norms, which make clear regulations on the production process, equipment requirements, quality inspection, etc. of ash bricks. For example, the local standard DB13/T5527-2022 "Technical Regulations for Production of Coal Catalytic Gasification Ash Autoclaved Bricks" in Hebei Province provides detailed requirements for the production of coal catalytic gasification ash autoclaved bricks. In terms of equipment maintenance, it is necessary to regularly inspect various system components, promptly clean up residual raw materials inside the equipment, check the wear of molds, and replace them in a timely manner; The electrical system needs to regularly inspect the wiring to ensure safe operation; The remote monitoring and fault diagnosis system of intelligent models needs to be regularly debugged to ensure the normal operation of the equipment. During the transportation and storage of equipment, it should be handled with care to avoid collision damage. Modular molds should be properly stored to prevent deformation.

        As an important equipment for promoting the utilization of solid waste resources, ash brick machines play an important role in environmental protection and building materials. It not only realizes the "turning waste into treasure" of industrial solid waste, reduces resource waste and environmental pollution, but also promotes the development of green building materials industry, which is in line with the national circular economy development strategy. Understanding the working principle, technical parameters, and application specifications of the ash brick machine, strictly following relevant standards for production and operation, can not only improve production and operation efficiency and product quality, but also fully leverage its environmental value and economic benefits, and help achieve the coordinated promotion of ecological protection and industrial development.