Recently, the technical upgrading of the "1.2 million tons of construction sand and gravel per year" production line has officially entered the final stage. In the technical upgrading workshop, the orderly arranged production lines are running at high speed. The technical upgrading engineers are checking the various operating links in an orderly manner on the central control platform. The production line is completed in one go from feeding, crushing, screening, shaping to finished products.

Through this technical upgrading, the company's production capacity has been increased from 300 tons/hour to 500 tons/hour. In addition to reducing energy consumption costs, the quality control of sand and gravel has been greatly improved, especially in terms of important indicators such as particle grading, mud content, fineness modulus, crushing value, and methylene blue value, which better meet customer needs and lay an important foundation for further expanding the sand and gravel sales market.