Pontevedra, Spain: 450 T/H Granite Crushing Production Line

40%

Processing Capacity

-16%

Energy Cost

-28%

Downtime

15 mo

ROI Period

The Challenge

The customer needed a high-capacity granite crushing production line for processing very hard quarry stone into high-quality construction aggregates. The main challenge was the hardness of the granite and the large raw material size after blasting, with some granite blocks reaching around 1 meter in diameter. Direct crushing of oversized hard granite would increase equipment wear, raise maintenance cost, reduce production stability, and affect finished aggregate quality. The customer required a crushing process that could reduce large granite blocks efficiently, protect core crushing equipment, lower operating cost, and produce stable aggregate products for construction and infrastructure applications.

450 T/H granite crushing capacity
Suitable for high-hardness granite stone
Multi-stage crushing reduces equipment wear
Improved aggregate quality and production profit

Our Solution

Zhenggang Machinery designed a multi-stage granite crushing solution according to the raw material hardness, feed size, and finished aggregate requirements. The process first uses heavy-duty feeding and primary crushing to reduce large blasted granite blocks. After the first crushing stage, the material is processed through a second crushing stage to reduce the stone size to below 15 cm. The material then enters medium and fine crushing sections for further size reduction and shaping. This staged process helps reduce equipment wear, improve crushing efficiency, control finished particle size, and increase the overall profitability of the granite aggregate production line.

Equipment Provided

Implementation Timeline

Site Assessment

2 weeks

Granite hardness, blasted material size, quarry layout, and aggregate requirement evaluation

Equipment Design

3 weeks

Multi-stage granite crushing process and equipment configuration design

Installation

5 weeks

Feeder, jaw crusher, cone crusher, screen, conveyor, and control system installation

Training

1 week

Operator training for crushing adjustment, wear control, screening, and daily maintenance

The project was implemented through site investigation, raw material analysis, crushing process design, equipment selection, manufacturing, installation, commissioning, and operator training. Zhenggang Machinery focused on solving the customer’s high-hardness granite crushing challenge by configuring a multi-stage crushing process that reduced oversized raw stone step by step, protected equipment, and improved finished aggregate quality.

The Results

After commissioning, the granite crushing production line provided stable 450 T/H aggregate processing capacity and improved the customer’s crushing efficiency. The multi-stage process reduced the large granite feed size step by step, lowered direct impact on key crushing equipment, and reduced wear-related operating costs. The optimized crushing flow also improved finished stone quality, supported better aggregate grading, and helped the customer produce more reliable construction materials for quarry, road, concrete, and infrastructure projects.

Before vs After Comparison

Metric	Before	After	Improvement
Granite Processing Capacity (T/H)	320	450	41
Equipment Wear Index	100	72	-28
Finished Aggregate Quality (%)	70	94	34
Production Cost Index	100	84	-16

Key Achievements

Built a 450 T/H granite crushing line

Processed high-hardness granite raw material

Reduced 1-meter granite blocks step by step

Lowered equipment wear through staged crushing

Improved finished aggregate product quality

Supported higher profitability for quarry operation

Client Testimonial

“Zhenggang Machinery provided a practical granite crushing solution for our quarry in Galicia. The production line was designed according to the hardness and large feed size of our granite material. The staged crushing process reduced equipment wear, improved aggregate quality, and helped us maintain stable high-capacity production.”