Optimization of the Particle Shape of Manufactured Sand in Dry Sand-Making Systems
Dry Sand Making and Shaping System Equipment Overview
The high-efficiency dry sand-making system is a complete set of tower-type dry sand-making equipment designed to comprehensively improve the particle shape, gradation, stone powder content, and porosity of manufactured sand. It has a production capacity of 90–270 t/h and accepts feed sizes of 5–32 mm. Centered around a vertical shaft impact crusher, it features a four-outlet deep-chamber impeller that produces high yields of well-shaped fine sand; The three-in-one combined classifier precisely separates stone powder from finished sand, with adjustable stone powder content ranging from 3% to 15%; the entire system features a negative-pressure closed-loop dust removal system to prevent dust leakage; the steel-structured tower layout minimizes footprint with modular rapid assembly; intelligent centralized control enables one-button start/stop and real-time monitoring, ensuring uniform and stable dry saturation of manufactured sand.
Dry Sand Making and Shaping System Equipment Highlights
1. Space-saving tower-style steel structure: The three-dimensional layout ensures high stability with a small footprint; the modular design enables high installation precision and rapid on-site assembly.
2. Superior sand production with four-outlet deep-cavity impeller: The vertical shaft impact crusher features a four-outlet deep-cavity impeller, delivering high output, excellent particle shape, and significantly increased fine sand production; thin-oil lubrication ensures reliability, while dual-motor hydraulic cover opening facilitates convenient maintenance.
3. Three-in-One Classifier with Adjustable Stone Powder Content: The combined classifier’s material dispersion technology perfectly separates manufactured sand from stone powder. Stone powder content is adjustable via variable frequency drive (3%–15%), with precise grading of oversized particles to produce high-value-added stone powder. The fineness modulus of the finished sand is also adjustable. 4. Closed-Loop Dust-Free Operation: The entire system operates under negative pressure to prevent dust leakage, reducing dust collector investment. 5. Centralized Powder Collection and Automatic Loading: The vertical powder silo and dust collector minimize piping connections and investment, while automatic silo monitoring and loading improve efficiency. 6. Sealed Conveying for Cleanliness: Fully enclosed conveyor belts with pneumatic-assisted lid opening and scheduled automatic dust removal.
VII. Homogenization, Water Addition, and Moisture Control: Automatic water addition ensures stability, resulting in finished sand with compliant moisture content and uniform dry-saturated surfaces.
VIII. Intelligent One-Button Start/Stop: Centralized modular software with electronic controls enables centralized management of all equipment, featuring one-button start/stop and real-time online intelligent monitoring.
Dry Sand Making and Shaping System Application Scenarios
Ready-Mix Concrete Plants: Manufactured sand meets all standards for particle shape, gradation, and stone powder content. Aggregates: Replaces wet sand production with dry methods, saving water and reducing costs. Cement Industry: Increases profits through stone powder recovery and reuse. Highway Infrastructure: Production of high-quality manufactured sand
Dry Sand Making and Shaping System Process Flow
Raw Material Bin → Bucket Elevator → Fully Enclosed Belt Conveyor → Vertical Shaft Impact Crusher (Sand Making & Shaping) → Circular Vibrating Screen (Grading and Screening) → Three-in-One Classifier (Stone Powder Separation and Fineness Modulus Adjustment) → Finished Sand Bin (Homogenization and Water Addition) + Stone Powder Bin (Automatic Loading)
Raw materials are elevated and conveyed through a sealed system into the vertical shaft impact crusher, where a four-port deep-chamber impeller performs high-speed crushing and shaping, resulting in sand with excellent particle shape and a high proportion of fine sand. After classification by the vibrating screen, the material enters the three-in-one classifier. Variable-frequency control of airflow precisely regulates stone powder content to 3%–15%, and the fineness modulus of the finished sand is adjustable. Excess stone powder is collected separately for high-value utilization. The entire system features a negative-pressure closed-loop dust removal system that prevents dust leakage, and the finished sand is homogenized with water to achieve a dry-saturated state. The intelligent system enables one-button start/stop and real-time monitoring. The tower-style layout minimizes footprint, while modular rapid assembly shortens the construction cycle.
Services
Solution Design: Select system configurations and classification parameters based on raw material characteristics, target sand fineness modulus, and stone powder content requirements.
Equipment Manufacturing: The vertical shaft impact crusher impellers are made of high-wear-resistant alloy; each classifier and dust collection system undergoes integrated commissioning testing before shipment.
Installation and Commissioning: On-site guidance for tower-type steel structure assembly, airflow calibration of the classification system, smart control system commissioning, and load testing.
Operation and Maintenance Management:
Provides impeller wear monitoring, guidance on variable frequency adjustment for the classifier, thin-oil lubrication maintenance, and a spare parts inventory plan for the entire system.
Dry Sand Making and Shaping System Project Case
Dry Sand Production Project at a Ready-Mix Concrete Plant in Luanda, Angola
Project Scale: 2,000 tons of manufactured sand per day Equipment Configuration: 1 set of high-efficiency dry sand-making system (including vertical shaft impact crusher + three-in-one classifier + dust collection system) Operational Data: System capacity: 180 t/h; finished sand fineness modulus: adjustable between 2.4–2.8; stone powder content: 6%–12% (variable frequency adjustable); finished sand moisture content: 4%–6% (meets dry saturation standard); system dust emission concentration: <20 mg/m³. Customer Feedback: Replacing the original wet process with dry sand making saves approximately 80,000 tons of water annually. The three-in-one classifier allows for precise adjustment of stone powder content, enabling direct supply to ready-mix plants for concrete of various grades. The tower-style layout occupies only 40% of the footprint of the original wet line. Intelligent one-button start/stop operation is simple and convenient, with a comprehensive failure rate of <1.5% over 12 months of system operation
Technical parameters:
Model
Feed size (mm)
Raw material input (t/h)
DLSM 120
5-32
100-120
DLSM 150
5-32
130-150
DLSM 250
5-32
220-250
DLSM 300
5-32
270-300
Dry Sand Making and Shaping System FAQ
What is the difference between a dry sand-making system and a wet sand-making system?
The dry sand-making system employs a three-in-one classifier with closed-loop dust removal technology. It operates under negative pressure to prevent dust leakage, and the stone powder content is precisely adjustable via variable frequency control between 3% and 15%. It produces high-quality manufactured sand without the need for water washing, saving over 80,000 tons of water annually. Dust-Free Closed-Circuit Sand Making Equipment This makes it an environmentally friendly and energy-efficient alternative to wet sand-making production lines.
How is the stone powder content controlled?
The three-in-one combined classifier uses variable frequency control to adjust airflow, allowing precise adjustment of stone powder content between 3% and 15%. It accurately classifies particles exceeding the specified size limit to produce high-value-added stone powder, and the fineness modulus of the finished sand is adjustable. Intelligent Powder Control Dry Sand Shaping System It is the equipment with the most precise stone powder control in tower-type dry sand making systems.
What are the advantages of the tower-type layout?
The steel-structured tower-type three-dimensional layout requires minimal floor space. Its modular design enables rapid on-site assembly, shortening the construction cycle. 90-270t/h High-Capacity Dry Sand Making System Compared to traditional wet-process lines, it reduces the footprint by approximately 60%, making it the preferred sand-making system for dry-process production lines due to its low investment and quick start-up.
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