Recently, the Standardization (Testing and Inspection) Professional Technical Committee of the China Railway Society and the Continuing Education and Training Center of the China Academy of Railway Sciences jointly held the first "Railway Mechanism Aggregate Key Technology Exchange Training Course" in Chengdu, Sichuan. The training course attracted about 300 industry-related trainees to learn and exchange on-site the application and technology of mechanism sand in railway engineering.

At present, mechanism sand and gravel aggregates have become the main force of sand and gravel for construction in my country, especially in the important engineering construction field of the railway system, which has extremely high requirements for the quality of sand and gravel products. With the continuous improvement of the performance of mechanism sand and gravel aggregate products and the reduction of river sand resources, the railway system has actively explored the application practice of mechanism sand and the establishment of a standard system, making important contributions to the application of mechanism sand in railway engineering. The successful holding of this "Railway Mechanism Aggregate Key Technology Exchange Training Course" will help key personnel in the railway field to deeply understand and effectively apply mechanism sand, which is of great significance to promoting the application of high-quality mechanism sand and ensuring the quality of national railway projects.

At the training meeting, Hu Youyi, President of the China Sand and Stone Association, gave a course on "The Development of Machine-made Sand and Stone and Its Application in Key Projects" to the trainees, and introduced in detail the development history of sand and stone aggregates and crushing and screening equipment, the progress and achievements of machine-made sand and stone in recent years, the relevant documents and standards and specifications of the government's support for the development of machine-made sand and stone, and the cases of typical sand and stone aggregate enterprises at home and abroad.

Liming Heavy Industry Group has made important contributions to the research and development and provision of machine-made sand production equipment. The following are several key equipment:

PEW European version jaw crusher

Feed size: 180-930mm

Discharge range: 10-275mm

Output: 12-650T/H

Product introduction:

PEW European version jaw crusher is suitable for crushing ores, rocks, slag, etc. with a compressive strength not higher than 280Mpa, and is mainly used for medium and fine crushing in industrial sectors such as metallurgy, mining, chemical industry, cement, construction, refractory materials and ceramics.

Technical features:

High-quality materials

Finite element analysis technology, higher strength

Symmetrical "V" shaped crushing chamber

Toothed guard plate, higher output

Larger bearings, higher load-bearing capacity

PE jaw crusher

Feed size: 125-1200mm

Discharge range: 20-360mm

Output: 5-1100T/H

Product introduction:

PE jaw crusher is widely used in mining, metallurgy, building materials, highways, railways, water conservancy and chemical industries. It is one of the flagship products of Liming Heavy Industry Group, especially in the design and production of large jaw crushers at a high level at home and abroad.

Technical features:

Deep crushing chamber without dead zone

Large crushing ratio, uniform product size, low noise, less dust

Gasket-type discharge port adjustment device

Large discharge port adjustment range, strong flexibility

Application in railway construction

Liming Heavy Industry Group's machine-made sand production equipment, such as VSI5X sand making machine, creates a construction sand production line, which produces sand and gravel aggregates with good particle shape and uniform particle size, and the performance of the concrete produced is comparable to natural sand concrete. Through efficient crushing and screening, the machine-made sand produced not only meets the demand for high-quality sand and gravel aggregates in railway construction, but also greatly improves the quality and service life of railway projects.

In engineering projects such as roads, bridges, and railways, the use of Liming Heavy Industry Group's machine-made sand production equipment can not only improve the quality of sand and gravel aggregates, but also provide reliable material guarantees for engineering construction. Liming Heavy Industry Group is committed to promoting the widespread application of high-quality machine-made sand in various projects and helping the high-quality development of national infrastructure construction.

Liming Heavy Industry Group believes that by providing advanced machine-made sand production equipment and technical support, it can further promote the construction and development of the railway system, improve the quality of projects, and ensure the smooth progress and long-term use of railway construction projects.