gravel production line-gravel production system-Xinxiang, Dingli

Aggregates Production Line Introduction

Aggregates are applied as skeleton and support in the buildings and important raw material for concrete preparation.

Types of Aggregates

Coarse aggregates refer to the stone with the particle size larger than 4.75mm such as pebbles and crushed stone. Its raw material includes limestone, bluestone, pebbles, granite and basalt for various applications.

Fine aggregates refers to the sand with the particle size less than 4.75mm. It mainly includes natural sand like river sand, lake sand, mountain sand and sea sand through desalination and various crushed sand

Aggregates Production Line:

The work flow successively includes feeding, crushing and screening independently conducted by the feeder, crusher and vibrating screen. With over 30-year experience in mining industry, Xinxiang Dingli is expert in configuring the production line with the daily capacity varying from 500 ton to 30000 ton. Featured by reasonable design, little maintenance cost and durable equipment, they are warmly welcomed in the mining industry.

Three Major Systems

1.Feeding

Vibrating feeder or other feeding equipment is applied to feed the raw material in the first process of production line.

2.Crushing

Crushing process is the most important part for the whole production line. It adopts one or more crushers to crush various raw materials into finished material with required size.

3.Screening & Conveying

In the production line, the crushed sand and stone material should be separated, therefore after being processed by the vibrating screen, they will be conveyed to separate silos.

Design Solutions for Aggregates Production Line

Equipment Configuration of Gravel Production Line

The aggregates production lines are configured based on the actual conditions of local terrain.

The equipment for ordinary aggregates production lines include:

Primary crusher: crush the bulk stone into small one; the material with unqualified size will be further crushed.
Secondary crusher: crush the materials into required size for being conveyed to the vibrating screen.
Vibrating screen: screen the crushed material into different types. The materials are returned by the conveyor for a repeated crushing.
Sand making machine: if crushed sand is required, the aggregates production line should also be equipped with sand making machine.
Sand washing machine: wash the crushed sand and clear away the impurities so as to make the grain shape better.

The primary crusher is determined by the quality of raw material：

Heavy hammer crusher: Materials with compressive pressure less than 200Mpa, such as limestone, bluestone, coal gangue, gypsum and bricks.
Jaw crusher: The materials with compressive pressure less than 320Mpa, such as pebble and dolomite.
Cone crusher: River pebbles, iron ore, quartz, granite, basalt, diabase, iron ore, gold, copper

Common secondary crushers:
Hammer crusher: large capacity, low power consumption, easy maintenance applicable for the material with low and medium hardness
Impact crusher: small capacity, sound grain shape, applicable for the material with medium and high hardness

Installation & Maintenance

Installation & Commissioning：
1.The equipment shall be horizontally installed in the concrete base and fixed by the foundation bolts.
2.The hosting machine should be vertically installed.
3.Make sure the bolts and bin gate are fastened after installation.
4.Equip the power cord and control switch according to the power of equipment.
5.Carry out no-load test and start operation after it passes test.

Maintenance：
1.Suffering all the load of machine, the bearing should be regularly lubricated so as to extend its service life. Main parts for lubrication include rotary bearing, roller bearing, all the gears , active bearing and sliding plane.
2.Frequently check the newly installed tires and make sure they are not loosened.
3.Make sure each part of all the equipment work normally in the stone production line.
4.Watch on the abrasion of wear parts and timely replace the worn parts.
5.Clear away the dust of base plane so as to avoid serious accident since the active bearing cannot move on the base plane out of unbroken material.
6.Shut down the machine immediately and troubleshoot the failure if the oil temperature of bearing is too high.
7.In case of impact noise in the operation of rotary gear, stop the machine immediately and solve the problem.

Development Prospect

With vigorous development of China’s real estate and building industry, it will bring a bright prospect for large eco-friendly gravel enterprises. Since 2015, many new investment modes have occurred, for example, some enterprises raise fund through issuing stocks, bonds and borrowing from banks. Moreover, more and more famous financial institutions start to input capital to the gravel and mining industry. Such changes will definitely stimulate the development of corresponding industry.

Meanwhile, the merge of gravel enterprises occurs more frequently. For example, a gravel aggregate enterprise in North China has ever acquired a private gravel plant by integrating three production lines into two with annual capacity respectively over 3 million ton.

It is an evitable trend for the large, eco-friendly and energy-saving production lines will gradually replace the small illegal ones in the near future.

Dingli Advances with Gravel Aggregates Industry

Starting from a gravel production enterprise over 30 years ago, Xinxiang Dingli now is dedicated to manufacturing mining equipment and configuring various aggregates production lines. In recent years, we also set up several companies especially for producing eco-friendly and intelligent mining equipment in order to respond national call to construct green and energy-saving gravel production lines.

Dingli offers one-stop service for the customer to construct large green aggregates production line including design, manufacturing, and installation, commissioning and after-sale service. The eco-friendly fine gravel production line constructed for China United Cement Corporation in Anyang is a model in North China with annual capacity over ten million ton. We have also built many green production lines with the most advanced design and equipment for the customers across China. Welcome to visit the production sites at any time.