Steel Structure Sand and Aggregate Production Line

1. Project Overview

Zhongyu Dingli 2M TPA Granite Manufactured Sand Production Line — Professional Hard Rock Sand Processing

This 2 million tons per annum granite manufactured sand line is a full integrated solution for high-efficiency hard rock sand processing, delivering stable large-scale output through a scientifically configured Cone-VSI closed-loop crushing circuit. Granite's extreme hardness (Mohs 6–7) demands specialized equipment and process design — this line addresses the core challenges of hard rock sand making: rapid wear, poor particle shape, high energy consumption, and unstable fine sand gradation.

Project Scale

• Annual Output: 2M TPA (2 million tons per annum)
• Processing Material: Granite (raw particle size 8–10 cm)
• End Products: Fine Sand 0.7–1.5 mm, Fine Sand 1.6–2.2 mm
• Finished Sand Moisture: 5–7% (after washing and dewatering)
• Total Investment: 109 million yuan (environmental investment: 1.2 million yuan)

Application Scenario Granite quarries, commercial manufactured sand plants, and large infrastructure projects (highways, bridges, high-rise buildings) where hard-rock fine sand meeting precise gradation specifications is required for high-strength concrete and mortar production.

Core Pain Points Solved

Solution Highlights

• Cone Crusher → VSI Crusher closed-loop: primary hard-rock reduction + precision shaping
• DL3YKZ3070 Vibrating Screen for dual-spec fine sand grading (0.7–1.5 mm & 1.6–2.2 mm)
• Full washing + dewatering circuit, finished sand moisture controlled at 5–7%
• Environmental investment 1.2 million yuan for green compliance
• Optional Mobile Crusher for on-site flexible processing

2. Process Flow

Granite Cone-VSI Closed-Loop Crushing with Washing & Dewatering

Raw granite (8–10 cm) is fed via a Vibrating Feeder into a Cone Crusher for primary crushing, reducing particle size to ≤5 cm. Material then enters a Vertical Shaft Impact Crusher (VSI) for secondary crushing and shaping. Crushed sand is classified by a DL3YKZ3070 Vibrating Screen — qualified fine sand (0.7–1.5 mm and 1.6–2.2 mm) proceeds to the Sand Washing and Dewatering process, while unqualified material is conveyed back to the Cone Crusher for re-crushing. After washing and dewatering, finished sand with moisture content of 5–7% is transported by conveyor belts to the finished product stockyard — forming a fully closed-loop, zero-waste production circuit.

3. EPC Service Content

109 Million Yuan EPC Turnkey — From Design to Full Production

① Solution Design

• Granite hardness testing & raw material grading analysis
• Cone-VSI closed-loop process optimization for hard rock characteristics
• Fine sand dual-spec screening design (0.7–1.5 mm & 1.6–2.2 mm)
• Environmental compliance blueprint with 1.2M yuan green investment plan

② Equipment Manufacturing

• Core package: Cone Crusher, VSI Sand Maker, DL3YKZ3070 Vibrating Screen, Vibrating Feeder, Sand Washer, Dewatering Screen, Conveyor System
• Optional module: Mobile Crusher (crawler/tire) for flexible on-site processing
• Environmental equipment: dust collectors, closed workshop structures, water circulation system
• ISO-certified manufacturing with factory acceptance testing

③ Installation & Commissioning

• Complete plant installation: civil works, equipment, electrical, and environmental systems
• Closed-loop circuit calibration and screening precision adjustment
• Trial run with raw granite; performance guarantee at 2M TPA
• Operator training covering crushing, screening, washing, and dewatering operations (5–7 days)

④ Operations & Maintenance Support

• Cone Crusher and VSI wear parts supply (high-chromium alloy components for granite)
• Sand washing and dewatering system maintenance
• Annual maintenance contracts and on-site spare parts warehouse
• Long-term O&M托管 service for continuous 2M TPA operations

4. Project Cases & Data

Real-World Performance — 2M TPA Granite Manufactured Sand Plant

Project: 2M TPA Granite Manufactured Sand Production Line Total Investment: 109 million yuan (environmental: 1.2 million yuan) Configuration: Cone Crusher + VSI Sand Maker + DL3YKZ3070 Screen + Washing & Dewatering Circuit

Production Data (Post-Commissioning)

Project Feature The production line processes 8–10 cm granite raw material through a precisely controlled two-stage crushing circuit. The Cone Crusher reduces input to ≤5 cm, and the VSI Crusher performs secondary shaping with controlled impact velocity. The DL3YKZ3070 Vibrating Screen separates dual-spec fine sand with high precision, and the closed-loop return circuit ensures every ton of granite is processed to specification — achieving zero waste and consistent product quality at 2M TPA scale.

5. FAQ

Q1: Why use a Cone Crusher for primary crushing instead of a Jaw Crusher on granite? Granite's hardness (Mohs 6–7) requires controlled, laminated crushing to avoid excessive fine generation and equipment wear. The Cone Crusher delivers inter-particle compressive crushing — granite fragments crush each other under pressure rather than against metal surfaces — which reduces wear part consumption by 40% compared to Jaw Crushers on hard rock, and produces more uniform intermediate particle size (≤5 cm) for the downstream VSI shaping stage.

Q2: How does the line achieve precise dual-spec fine sand grading (0.7–1.5 mm and 1.6–2.2 mm)? The DL3YKZ3070 Vibrating Screen is a 3-deck precision screening unit specifically configured with mesh sizes calibrated for the two target fine sand specifications. After VSI shaping, material enters the screen where the upper deck extracts the 1.6–2.2 mm fraction and the lower deck captures the 0.7–1.5 mm fraction. Material outside both ranges is automatically returned via conveyor to the Cone Crusher for re-crushing — ensuring that every output ton meets the exact specification required for high-strength concrete and industrial mortar applications.

Q3: What is the environmental investment and how does it ensure green compliance? The project allocates 1.2 million yuan specifically for environmental protection infrastructure. This covers pulse dust collectors on all crushing and screening equipment, a closed workshop structure enclosing the entire production line, a water circulation system for sand washing with ≥90% reuse rate, and atomizing sprinkler systems for dust suppression at material transfer points. Together, these measures achieve dust emission below national standard limits and wastewater zero discharge — ensuring full compliance for long-term operation permits.