At a time when the sand and gravel industry is booming, efficient, intelligent and environmentally friendly sand production lines have become the goal pursued by many companies. Liming Heavy Industry, as a leading enterprise in the field of sand and gravel equipment manufacturing, has created a series of advanced sand production lines with its profound technical accumulation and outstanding innovation capabilities, setting a new benchmark for the industry.

1. The production line configuration is scientific and reasonable to meet diverse needs

The sand production line configuration of Liming Heavy Industry is carefully designed according to the on-site survey or the actual requirements of customers, which fully reflects the rationality, effectiveness and applicability of the design. The production line has a large processing capacity, low wear and low operating cost. According to different process requirements, various types of equipment can be combined to meet the different process requirements of customers.

Its sand production line is mainly composed of vibrating feeder, jaw crusher, impact crusher (or cone crusher), vibrating screen, sand making machine, belt conveyor, centralized electric control and other equipment. In order to meet the different processing needs of customers, it can also be equipped with dust removal equipment. Large blocks of stone are evenly fed into the jaw crusher by the vibrating feeder through the silo for coarse crushing. The coarsely crushed stones are sent to the impact crusher (or cone crusher) by the belt conveyor for further crushing; the finely crushed stones are sent to the vibrating screen by the belt conveyor for screening, and several different specifications of stones are screened out. The stones that meet the particle size requirements are sent to the finished product pile by the finished product belt conveyor; the stones that do not meet the particle size requirements are returned by the belt conveyor to the impact crusher (or cone crusher) for re-crushing, forming a closed-loop multiple cycle.

2. Excellent performance of core equipment to ensure efficient production

Jaw crusher: Pioneer in coarse crushing

Liming Heavy Industry's jaw crusher uses high-strength wear-resistant materials and is equipped with an optimized crushing cavity. It can quickly crush large blocks of materials into suitable sizes with strong bite force, laying a solid foundation for subsequent crushing links. Its unique design makes the crushing efficiency high and the wear low, greatly extending the service life of the equipment.

Impact crusher and cone crusher: medium and fine crushing tools

According to the characteristics of different materials, Liming Heavy Industry provides two types of medium and fine crushing equipment: impact crusher and cone crusher. The impact crusher adopts advanced crushing principle, crushes the material through high-speed rotating hammer, and produces finished products with good particle shape and reasonable gradation; the cone crusher has the advantages of large crushing ratio, high efficiency and low energy consumption, and is especially suitable for crushing high-hardness materials.

Sand making machine: particle shape optimization expert

Liming Heavy Industry's sand making machine is one of the core equipment of the production line. It adopts advanced centrifugal impact crushing principle, accelerates the material through high-speed rotating impeller to throw it out, and realizes mutual impact crushing between materials. The produced machine-made sand has uniform particle size, good particle shape and reasonable gradation, which fully meets the national construction sand standards. For example, the VSI6X series vertical shaft impact crusher has a unique rotor structure design, wear-resistant material process, crushing speed optimization and hydraulic design, which can provide high-quality sand and gravel aggregates for roads, railways, municipal construction and concrete mixing stations.

Vibrating screen: precise sorter

The vibrating screen is like a "precise sorter" of the production line. It has multiple layers of screens and can accurately screen the crushed materials into various specifications according to different engineering requirements. The precise screening ability ensures the consistency of the finished product quality and meets the strict requirements for sand and gravel particle size in different fields such as construction and roads.

3. Energy saving and environmental protection, practicing the concept of green development

Noise reduction measures to create a quiet production environment

Liming Heavy Industry has taken a series of effective measures to reduce the noise of the sand production line. From the equipment selection, try to choose low-noise equipment, such as low-noise sand making machines and crushers. For existing equipment, vibration noise can be reduced by structural improvement, locking treatment, and adding damping materials. For example, a soft soundproof cover is added to the outside of the exciter of the vibration screening equipment, damping treatment is added between the inner and outer sleeves of the bearings at the pulleys on both sides, and damping materials are added to the hollow rolling body caused by the rolling of the bearings, thereby reducing the vibration of the bearings. The noise source equipment is arranged in a closed workshop, and greening is carried out outside the workshop to block the spread of noise. The application of additional barriers to block the spread of noise, or the use of natural terrain such as hills, high slopes, forests, grasslands or large buildings that are not afraid of noise, etc., to reduce the spread of noise. At the same time, a rotation system is adopted to reduce the working time of workers entering the noise area. During the operation, workers should try to wear earplugs, helmets and other special sound insulation tools to reduce the harm of noise to people.

Dust removal design to achieve zero dust emission

In terms of dust removal, Liming Heavy Industry's sand production line adopts advanced dust removal technology. In the links where dust is easily generated, such as crushing and screening, wet operations, such as spray dust reduction systems, can effectively reduce dust flying. The entire production line is closed as much as possible to reduce the leakage of dust. A negative pressure dust suction system is used to collect and centrally treat the dust inside the production line. Select equipment such as crushers and screeners with dust removal devices to reduce the generation of dust from the source. Seal the feed inlet, discharge port and other parts of the equipment that are prone to powder leakage to reduce dust leakage. Install a bag filter at the end of the production line to filter the dusty gas discharged to ensure that the emission meets the standard. Clean the production line regularly, including dust accumulation on the equipment surface, ground and dust removal system to prevent secondary dust.

4. Many successful cases and good customer reputation

The sand production line of Liming Heavy Industry has been successfully applied in many projects and won high praise from customers. For example, in the river pebble processing project in Xining, Qinghai, the main equipment of the project was purchased from Liming Heavy Industry, including 2 PEW250 x 1000 European version jaw crushers and 2 VSI9526 sand making machines. The PEW European version jaw crusher is used for coarse crushing, and the 5X sand making machine performs more detailed shaping of the coarsely crushed stone, making the finished sand and gravel more uniform in shape and more reasonable in grading. The entire production line operates stably and has a large output, providing good quality stone for the local area.

In a river pebble sand production line project in Longnan, Gansu, the project is located in Longnan, Gansu. The processed river pebbles are used for local infrastructure construction, with a daily processing of 800 cubic meters. The main equipment of this production line was purchased from Liming Heavy Industry, which consists of 2 PEW250x1000 European jaw crushers and VSI9526 sand making machine, and has also achieved good production results.

Liming Heavy Industry's sand production line has become the first choice for sand production lines in the sand and gravel industry with its scientific and reasonable configuration, excellent core equipment performance, energy-saving and environmentally friendly design and numerous successful cases. In the future, Liming Heavy Industry will continue to uphold the concept of innovation, efficiency and environmental protection, and continuously launch more advanced sand production lines to make greater contributions to the development of the sand and gravel industry.