The main factors that affect the production effect of dry legal sand process in the production line of sand and gravel aggregate are in the following aspects:

1) Raw material conditions.

In rock processing, pressure -resistant intensity is the key to distinguishing soft rocks and hard rocks, which directly affects process design and equipment selection. For the water content, the raw material needs to be less than 2%before it is suitable for dry legal sand to ensure sand making efficiency and quality. Therefore, when choosing a sand making solution, it is necessary to comprehensively consider the characteristics of rock characteristics and the moisture content of raw materials to ensure the applicability of process and equipment.

2) Process design.

In -depth research method is the basis for designing a reasonable process. The drying process is particularly harsh on feeding conditions, and it is usually required to be small and low in water content. The particle size control is more ideal within the range of 0-15mm. If the particle size is 0-50mm, it will increase the processing volume, reduce yield, and exacerbate equipment wear. Therefore, accurate control of raw materials is important.

3) Technical indicators.

Quality indicators such as fine degrees, powder content, and MB value meet the national or industry standards.

4) Device layout.

The layout is divided into a building (building or tower).

5) Device selection.

Consider the characteristics of raw materials and product requirements for the selection of powder selection machines. In the screening device, the vibration sieve is suitable for coarse sieve, the straight line screen is suitable for fine sieve, and the ellipse screen has both advantages. The "stone hitting iron" mode is suitable for hard rocks and high efficiency; the "stone hitting stone" mode is suitable for soft rocks and small wear. The performance parameters of key equipment such as processing capacity and abrasion resistance need to be comprehensively considered to ensure the smooth and efficient process.

6) Core technology.

Optimize the sand making technology from the aspects of powder removal technology, wear -resistant technology, grade adjustment technology, intelligent control technology and environmental protection technology.