A "350 TPH aggregate crushing production line" is a set of continuous integrated equipment capable of processing 350 tons of raw materials per hour, specifically designed to convert ores (such as limestone, granite, basalt) or construction waste (such as waste concrete, waste bricks and stones) into construction aggregates. Its core feature is a "stable processing capacity of 350 tons per hour", and it is widely used in sand and gravel plants, building material factories, and large-scale infrastructure projects (such as expressways, high-speed railways, and hydropower stations) for aggregate supply. It serves as the core system for large-scale production of high-quality construction aggregates.

I. Core Concept Breakdown: Meaning of 350 TPH and Uses of Aggregates

1. Definition of 350 TPH
   TPH stands for "Ton Per Hour", representing the theoretical processing capacity of the production line. When the raw material characteristics (hardness, humidity, block size) meet the design standards and the equipment operates at full load, it can process 350 tons of raw materials (such as large ore blocks, waste concrete blocks) per hour.
   Note: The actual production capacity is affected by the moisture content of raw materials (excessive moisture may cause blockages), impurity content (such as soil, steel bars), and equipment maintenance status. Typically, the actual capacity is 85%-95% of the theoretical value (i.e., approximately 297-332 tons per hour).
2. Core Uses of Aggregates
   The "aggregates" finally produced by the production line are basic raw materials in the construction industry, mainly divided into:
   • Coarse aggregates: Particle size 5-31.5mm (such as crushed stone), used for concrete skeletons, subgrade filling, and prefabricated components;
   • Fine aggregates: Particle size 0.15-5mm (such as manufactured sand), used for concrete mortar, wall plastering, and tile bonding;
   High-quality aggregates must meet the standards of "uniform particle shape (mainly cubic, no needle-like or flaky particles), continuous gradation (reasonable proportion of different particle sizes), and low impurities (mud content < 3%)". The 350 TPH production line can stably produce aggregates that comply with national standards (such as GB/T 14685 Aggregates for Concrete) through precise equipment configuration.

II. Core Composition of a 350 TPH Aggregate Crushing Production Line: 4 Functional Modules

A complete 350 TPH production line requires equipment configuration according to the process of "raw material processing → crushing → screening → finished product storage". Each module complements each other to ensure continuous and efficient operation. The following is a typical configuration (taking "hard rock raw materials such as granite" as an example):

III. Key Features of the 350 TPH Production Line: Why It Is Suitable for Large-Scale Needs?

1. High Capacity and Stability
   The equipment selection is centered on "matching 350 TPH". For example, the crushing chamber design and motor power (usually with a total power of 300-500kW) of jaw crushers and cone crushers are calculated to ensure continuous operation for 10-12 hours per day (with a daily capacity of 3500-4200 tons), meeting the demand of "thousands of tons of aggregates per day" for large-scale infrastructure.
2. Strong Adaptability
   The configuration can be adjusted according to the type of raw materials:
   • For soft rocks (such as limestone): The cone crusher can be omitted, and a "jaw crusher + impact crusher" can be used directly (impact crushers produce better particle shapes and have lower costs);
   • For construction waste (waste concrete): A "steel bar separator" (magnetic separation or manual sorting) needs to be added to prevent steel bars from wrapping around the equipment;
   • For multi-specification finished products: It can be achieved by adjusting the number of layers of the vibrating screen (e.g., 4 layers for screening 5 specifications).
3. High Degree of Automation
   Mainstream production lines are equipped with PLC control systems, which can realize:
   • Automatic adjustment of feed rate (adjusted according to the load of the crusher to avoid blockages);
   • Equipment fault alarm (such as excessive bearing temperature, belt deviation);
   • Real-time monitoring of finished product particle size (feedback through sensors to adjust the crusher gap);
   Only 2-3 operators are needed (to monitor equipment operation + regular maintenance), reducing labor costs.

IV. Application Scenarios: Which Projects Need a 350 TPH Production Line?

1. Large-Scale Sand and Gravel Production Bases
   Provide stable aggregates for commercial concrete mixing plants and prefabricated component factories (e.g., a sand and gravel plant with an annual output of 1.5-2 million tons of aggregates requires 2-3 350 TPH production lines).
2. Supporting Facilities for Large-Scale Infrastructure Projects
   For projects such as expressways, high-speed railways, and cross-sea bridges (e.g., a single high-speed railway section requires 3000-5000 tons of aggregates per day), a 350 TPH production line can be built on the project site to reduce raw material transportation costs (transportation costs per ton can be reduced by 10-20 yuan).
3. Resource Recycling of Construction Waste
   Waste concrete and waste bricks generated from urban demolition (such as old community reconstruction and factory demolition) are processed into recycled aggregates through the 350 TPH production line, realizing "turning waste into treasure" (recycled aggregates can be used for subgrades, permeable bricks, and low-strength concrete).

V. Core Considerations: Key Points for Construction and Operation

1. Site Requirements
   The production line needs a linear layout (raw materials → crushing → screening → finished products), covering an area of approximately 1500-2000 m² (including raw material storage areas and finished product silos). The ground needs to be hardened (to avoid raw material pollution) and drainage systems should be well-equipped (to prevent raw material caking caused by rainwater).
2. Environmental Requirements
   Dust removal equipment (such as pulse bag filters with an air handling capacity of 20000-30000 m³/h) and noise reduction measures (equipment foundation shock absorption, dust covers for belt conveyors) must be configured to meet the Emission Standard for Environmental Noise at the Boundary of Construction Sites (≤70 dB during the day, ≤55 dB at night) and dust emission limits (particulate matter ≤10 mg/m³).
3. Maintenance Costs
   Wear parts (such as jaw plates of jaw crushers, liners of cone crushers, and impellers of impact crushers) need to be replaced regularly. Taking hard rock processing as an example, the cost of wear parts per ton of aggregates is approximately 0.5-1 yuan. In addition, regular lubrication of equipment (such as the main shaft of cone crushers and motor bearings) is required to ensure the service life of the equipment (usually 5-8 years for core equipment).

In summary, the 350 TPH aggregate crushing production line is a "large-scale, standardized, and efficient" aggregate production solution. Its core value lies in stably outputting aggregates that meet construction needs through a reasonable combination of equipment, supporting the construction of large-scale projects and the sustainable operation of the building materials industry.