Limestone mechanism sand and gravel aggregate production line with an hourly output of 4000t/h

Case sharing of limestone mechanism sand and gravel aggregate production line, using impact crusher, vertical shaft impact crusher and other equipment to achieve an hourly output of 4000t/h, and the products are widely used in key projects. Advanced technology, environmental protection and high efficiency, promote the green and sustainable development of the sand and gravel aggregate industry.

With the rapid development of domestic infrastructure construction, the demand for sand and gravel aggregates is increasing. However, traditional sand and gravel aggregate production enterprises generally face problems such as small production scale, low production capacity, backward technology and serious environmental pollution. In order to meet market demand and achieve green and sustainable development, large-scale, intensive and environmentally friendly have become urgent needs for sand and gravel aggregate production lines. The following will share with you a case of limestone mechanism sand and gravel aggregate production line with an hourly output of up to 4000t/h.

1. Project Overview

This project uses limestone as raw material and adopts the production process of "two-stage impact crusher + vertical shaft impact crusher + four-stage screening + composite powder selection", successfully achieving a breakthrough of more than 4000t/h per hour. The high-quality machine-made sand and gravel produced are widely used in provincial and municipal key projects such as highways, subways, and super-high-rise buildings, and have been widely recognized by the market.

2. Process introduction

Coarse crushing link

According to the annual mining and processing volume of the project and the regional conditions of the mine, two impact crushers with a single unit output of ≥2000t were selected as coarse crushing equipment. The equipment has a large crushing ratio, a small ore pressing area, and good particle shape of the crushed materials. It is an ideal choice for producing high-quality machine-made sand and gravel.

Secondary crushing link

The secondary crushing equipment is mainly responsible for processing the screened materials after the primary crushing. Four impact crushers with a single unit output of ≥600t were selected. Through two-stage crushing (i.e., a combination of impact crusher (primary crushing) + impact crusher (secondary crushing)), the goal of high yield and good particle shape was achieved.

Sand making link

The sand making equipment uses a vertical shaft impact crusher (sand making machine), which adopts the working principle of stone hitting stone. In the high-speed rotating turntable, the stones collide and crush each other to form round and well-graded machine-made sand. The equipment has high sand making efficiency and stable product quality.

Desilting process

The desilting process uses roller screens for screening. Through the conveying, rolling and loosening of the rollers, the mud content and methylene blue value are effectively controlled.

Screening link

Aggregate screening uses a circular vibrating screen, which has high screening efficiency and large processing capacity, and is suitable for large particle size screening and large-scale production. The machine-made sand screening uses a high-frequency screen, and the screen vibration frequency is as high as 4000-4200r/min, which effectively improves the screening efficiency.

III. Summary

By adopting a process combination of impact crusher, vertical shaft impact crusher, circular vibrating screen, high-frequency screen and composite powder selection, this project has successfully achieved the production goals of large-scale, intensive and environmentally friendly. The machine-made sand and gravel produced have good particle shape, reasonable grading and low methylene blue, which meets the high-quality requirements of key projects. In the future, we will continue to be committed to the research and development and innovation of sand and gravel aggregate production technology, and contribute to the green and sustainable development of my country's sand and gravel aggregate industry.