How To Process River Stone Crusher Plant 350tph

As a pure natural stone, river stone are constantly squeezed and rubbed during the impact of mountain torrents and the transportation of flowing water, and their hardness is relatively high. River stone are relatively common raw materials for the manufacture of sand and gravel aggregates. They are widely distributed and have low acquisition costs. Only a few processing equipment can be invested to make high profits. Taking the 300-400tph river stone crushing plant as an example, what equipment is needed for the pebble crushing production line? What is the process flow?

Background demand introduction

Project planning: 300-400 tons of stone production line per hour
Ore: river pebbles, original sand content 20%, original ore specifications: ≤720mm (≤200mm content accounts for 50%)
Finished product requirements: 0-5, 5-10, 10-20mm

Equipment list for river stone crushing plant

The entire production line includes feeding, crushing, screening, transportation and other work. Among them, crushing is divided into coarse crushing, medium crushing and fine crushing. The main equipment list is as follows:
1. Grid type vibrating feeder: ZSW1360
2. European type jaw crusher: C110
3. Symons cone crusher: CS220 & CS160
4. 5X series sand making machine: VSI5X1150
5. Circular Vibrating screen: 2YK2470 & 4YK3070
6. Belt conveyor

Process flow of river stone crushing plant

1. The vibrating feeder adopts a grind type feeder. According to the proportion of small raw materials, the material ≤80mm is first processed through the grate bar, and the material larger than 80mm enters the jaw crusher for crushing. The two materials share a belt conveyor to enter the first-level screening;

2. The first-level screening screens the material into 0-5mm 5-50mm (the specifications of this material can be adjusted to the required range according to the proportion in the raw materials) There are three types of materials with a size of more than 50mm. The 0-5mm material enters the spiral sand washing machine for water washing to remove impurities such as soil in the original sand. The 5-50mm material enters the fine cone for crushing (this fine cone is mainly used to process the finished materials contained in the raw materials, because the finished materials in the raw materials are mostly round and elliptical. This kind of material cannot be used as sand and gravel aggregate and must be crushed to make it close to a polyhedron). The material larger than 50mm enters the medium crushing cone for crushing. The selection of cones is that the medium crushing cone has a large size and the fine crushing cone has a small size. This is because the proportion of material particle sizes in the raw materials is different. If the proportion of small materials in the raw materials is too small and the fine crushing cone is too large, it will cause waste of production capacity. If the proportion of small materials is too large, the feeding amount can be controlled by adjusting the particle size entering the fine crushing cone. This selection can prevent the waste of production capacity of the entire production line when the proportion of large materials is too high;

3. The materials from the two cone crushers enter the secondary screening through the belt conveyor. The materials of 0-25mm enter the shaping machine for shaping to meet the shaping requirements of the materials. The materials of >25mm return to the two cone crushers for secondary crushing. A flap is set in the feed hopper to control the amount of materials entering the two crushers to avoid overloading the capacity of one of the crushers;

4. After the materials enter the shaping machine, they enter the third-level screening through the belt conveyor to screen out the required finished material specifications, such as 0-5 5-10 10-20.

The above river stone crushing process configured by Henan Baichy takes into account the investment cost of the crushing project as well as the production cost of the production line. Its production line has the characteristics of simple structure, low energy consumption and large production capacity. Because the pebbles are crushed, the loss of wear-resistant parts of the equipment is very high. Therefore, in the design of the crushing process, the concept of "more crushing and less grinding" and the crushing equipment based on the lamination principle are used as much as possible to reduce the loss of wear-resistant parts, and exclude some traditional crushing equipment based on the principles of grinding and beating.

This river stone crushing plant can make various rocks, gravel, and river pebbles into construction sands of various particle sizes. The sand has uniform particle size and high compressive strength. It is far more in line with construction requirements than natural sand and sand produced by ordinary hammer sand blasting machines, and can improve the quality of construction. The finished sand meets the national technical standard BG14684-2001 for construction sand, with uniform particle size, good particle shape, and reasonable grading. It is a high-quality concrete aggregate.