In the traditional sand making process mainly for jaw + counterattack + vertical shaft, the main bells and whistles of the traditional process for the system installed power is large, the content of needle flake is high (isometric ratio is large), the fineness modulus of the sand is difficult to adjust, the output of finished material can be adjusted within a small range, the system of civil construction is large, etc., our company combined with many years of experience in the construction of hydropower process, municipal, transportation, and the implementation of the system in a number of systems proved that, in the middle and hard rock areas. Adopting the stone molding process of counterattack+counterattack+vertical shaft can have the advantages of reduced installed power, controllable quality of finished coarse aggregate, and the fineness modulus of finished sand is controlled within the range of medium sand.

The advanced technology of finished aggregate molding is guaranteed from the following points:

1. Coarse crushing has been in the country, inside and outside the large-scale projects have been mature, the application of the full impact crusher production, to ensure that each level of the finished aggregate grain quality, due to coarse crushing impact crusher feed particle size (CF900 impact crusher maximum feed particle size of up to 1800mm), can reduce the mining and blasting costs of the material field, and the crushing ratio of the large, can reduce the pressure of the medium crushing, crushing equipment can be greatly reduced, the screening load and sub return less material (low energy consumption);

2. Middle crushing impact crusher has the advantages that the conventional impact crusher can not be compared, the feed number diameter can reach 500mn, which can effectively support the coarse crushing equipment, and has the advantages of high output, low energy consumption, good particle size, finished product particle size adjustable;

3. The system at all levels of materials through the impact crushing mode of production, the most advanced program for the existing sand and gravel system, with the traditional equipment configuration, process programs can not be compared with the advantages of the finished product particle size is excellent, can provide high-quality sand and gravel materials for commercial concrete;

4. Fangzai mature, advanced, domestic large and medium-sized projects are widely used, high availability;

5. The main production equipment, belt machine configuration is small, the total power is low, the civil construction, steel structure system security, equipment procurement costs, construction time is short, the system running cost is low, low maintenance costs;

6. Due to the production of sand and gravel material grain type and good grading, concrete of the same quality of cement and additives can be greatly reduced in dosage, good economic efficiency indicators.