In the sand and gravel industry, crushing and sand production from hard rocks such as basalt and granite has always been a challenge. Traditional crushing methods often suffer from rapid equipment wear, low output, and poor sand quality. However, with technological advancements and process innovations, this problem has been successfully overcome, resulting in a highly efficient, low-consumption, and high-quality basalt sand production process.

Basalt Sand and Gravel Aggregate Production Line

I. The Obstacles to Basalt Sand Production

Basalt is known for its high compressive strength, toughness, and hardness, making it difficult for traditional crushing equipment to handle. During the crushing process, equipment wear is severe, requiring frequent replacements, and output often falls short of design requirements. Furthermore, the aggregate shape after basalt crushing is unsatisfactory, with a high content of needle-like and flaky particles and a high fineness modulus, affecting the quality and selling price of the sand and gravel.

II. Innovative Processes to Overcome the Challenges

To address the various challenges in basalt sand production, an advanced process of "four-stage crushing, combined vertical shaft impact crusher and rod mill sand production" is adopted. Through reasonable equipment configuration and process design, the goal of high-efficiency, low-consumption, and high-quality sand production was successfully achieved.

1. Equipment Selection and Configuration: Suitable equipment was selected for crushing and sand production based on the characteristics of basalt. Optimized equipment selection ensured that the actual processing capacity of the equipment was close to the theoretical output, while reducing equipment wear and replacement frequency.

2. Finished Aggregate Particle Shape Control: To improve the poor particle shape quality of the crushed basalt aggregate, measures such as controlling the crushing ratio through medium and fine crushing, continuous feed gradation, full-fill feeding, and layered crushing were adopted. Simultaneously, shaping measures were implemented to ensure that the particle shape of the finished aggregate met the specifications.

3. Control of Sand Yield, Fineness Modulus, and Stone Powder Content: To address the issues of low sand yield, high fineness modulus, and low stone powder content in basalt sand production, measures such as increasing the rotor speed of the vertical shaft impact crusher and adjusting the feed gradation were taken. In addition, a rod mill was used to further crush aggregates <5mm to adjust the fineness modulus and stone powder content of the finished material.

III. Actual Operational Results

Through actual operational testing, the basalt sand making process has achieved significant results. The actual production capacity of the equipment in each crushing workshop reached the expected targets, the needle-like and flaky content of the finished aggregate met the specifications, and the finished sand yield and fineness modulus of the vertical shaft impact crusher both met the standards for high-quality sand and gravel.

IV. Future Outlook

In the future, we will continue to optimize the basalt sand making process and continuously improve the automation and intelligence levels of the equipment. At the same time, we will focus on environmental protection and energy conservation, striving to create a green, low-carbon, and efficient sand and gravel production line. We believe that in the near future, the basalt sand making process will usher in a broader prospect for development.