Granite, as a natural stone with high hardness and wear resistance, is an important raw material for high-quality sand and gravel aggregates. In recent years, with the growing demand for high-quality machine-made sand in the construction and infrastructure industries, granite sand production lines have become a hot spot for investment. The following is an analysis of the configuration and operation results of a 180-240 tons per hour granite sand production line designed by Liming Heavy Industry for a customer in Fujian through a typical customer case.

Project background and requirements

The customer is located in Fuding City, Fujian Province, where local granite resources are abundant, but traditional processing methods are inefficient and the finished product gradation is uneven. Customer requirements are clear:

Raw material characteristics: feed particle size ≤600mm, containing a small amount of soil impurities;

Finished product requirements: 0-5mm machine-made sand (accounting for 40%), 5-10mm, 10-20mm, 20-31.5mm crushed stone aggregates;

Production capacity target: Stable output of 180-240 tons per hour, used for concrete mixing stations and highway construction.

Production line configuration and process highlights

Liming Heavy Industry adopts a three-stage crushing process of "coarse crushing + medium and fine crushing + sand making and shaping". The core equipment includes:

Coarse crushing stage: PE750×1060 jaw crusher, which can efficiently process large pieces of granite and has strong impact resistance;

Medium and fine crushing stage: HPT300 multi-cylinder hydraulic cone crusher, which reduces the needle-like content through the principle of lamination crushing;

Sand making and shaping: 5X1145 impact sand making machine, which can realize the dual-mode switching of "stone hitting stone" and "stone hitting iron", and the finished product has a rounded particle shape and adjustable fineness modulus;

Auxiliary equipment: GZD vibrating feeder, 3YKN2675 vibrating screen (multi-stage screening), XSD3016 sand washing machine (dust removal).

Process flow: raw materials → jaw crusher coarse crushing → cone crusher medium and fine crushing → screening → sand making machine shaping → sand washing → finished product storage. Among them, the closed-loop design ensures that the substandard materials are returned for reprocessing to improve resource utilization.

Operation effect and customer feedback

Production capacity reaches the standard: the actual output is stable at 220 tons/hour, the fineness modulus of machine-made sand is 2.6-3.0, which meets the standard of Class II construction sand;

Economic benefits: the finished sand aggregate has excellent grading, the selling price is 15%-20% higher than the market average price, and the investment cost is recovered within half a year;

Environmental protection and energy saving: equipped with pulse dust collector and circulating water system, dust emission <20mg/m³, realizing green production.

Customer evaluation: "The production line has a high degree of automation, especially the hydraulic cover design of the 5X sand making machine, which is convenient for maintenance. The after-sales team of Liming Heavy Industry responds 24 hours a day to ensure continuous production."

Industry enlightenment

This case proves that for high-hardness materials such as granite, scientific process design (such as multi-stage crushing + shaping) and equipment selection (such as cone crusher + impact crusher combination) are the key. In the future, with the integration of intelligent control and environmental protection technology, granite sand making production lines will further develop in the direction of high efficiency and low carbonization.

Conclusion: Liming Heavy Industry is customer-oriented and provides one-stop services from solution design to operation and maintenance support, helping to efficiently transform granite resources and injecting "sand" power into infrastructure upgrades.