High-quality Sand Aggregate Production Line

Abstract

Sand aggregate production line system generally includes several units: primary grinding unit, semi-finished product storage unit, medium and fine crushing unit

Solution Scheme

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Sand aggregate production line system generally includes several units: primary grinding unit, semi-finished product storage unit, medium and fine crushing unit, screening unit, finished product storage unit, loading weighing system, water supply and water treatment unit, electrical automation system, spare parts And repair center. The Sand Washing Machine process is suitable for crushing softer and less abrasive rocks, such as limestone, and is a typical process for most of the current commercial sand aggregate processing systems. The process is simple and the equipment configuration is small.

Before the crushing, the bar feeder is configured. The bar feeder has the function of uniform and stable feeding and sieving. The bar screen is broken into the jaw crusher to increase the production efficiency of the crusher and reduce the lining. Wear. According to the condition of the material, the rod sieves can enter the conditioning stack together with the coarse aggregate, or they can enter the desilter screening machine to remove the sludge and remove the sludge before the coarse separation, which can greatly reduce the waste of useful materials. And to achieve the purpose of removing mud.

Before the smashing, the general adjustment of the stockpile is set. Due to the discontinuity of the car transportation, the adjustment of the stockpile can ensure that the subsequent process can be continuously and stably produced during a certain period of time, improve the utilization efficiency of the equipment, and at the same time, when the coarse shards temporarily overhaul or handle the super-dumping stone , Follow-up process is not affected.

The impacted crusher is used in the middle crushing, and the broken aggregate enters the pre-screening workshop. The aggregate that meets the specifications enters the finished aggregate pile, the super diameter aggregate enters the crushing workshop, and the rest enters the finished product screening workshop for screening. The required finished aggregate enters the finished aggregate heap.

Sand Aggregate Production Line

General merchandise concrete aggregate processing system process 2

The process is suitable for crushing hard and highly abrasive rocks such as granite and quartzite. The principle of "laminated crushing" of cone crusher is mainly used. After the finished coarse aggregate is broken through two cones, a better shape is obtained.

Compared with Scenario 1, in the process flow of Case 2, the crushing and screening process in the middle crushing section is the same, and the crushing and post-sequencing processes are different.

After the crushed aggregate enters the pre-screening workshop, the fine aggregate less than 5mm is screened through the pre-screening, and all the coarse aggregate enters the crushing workshop for crushing, and then enters the finished screening workshop through the finely divided aggregate. The aggregate that meets the specifications enters the finished aggregate pile, the ultra-diameter aggregate enters the crushing workshop, and the adjustment workshop is installed in the crushing workshop. When the relevant host or other equipment fails, the silo can function as a storage material. Reducing the risk of full-chamber and belt-load start-up after the main engine has been parked, and at the same time, the adjustment of the bunker can allow the fine-grained chamber to be filled with material, so that the finished aggregate is better grained and the equipment wear is lower.

Better-sized aggregates can reduce the amount of cement, increase workability, reduce the chance of pumped concrete blocking the pipeline, and reduce the cost of the concrete mixing plant; it can also increase the strength of concrete, which is why high-grade concrete is rough The reason why the grain size of the aggregate is strictly controlled.

Answer

In the process, finely divided fine aggregates are sieved out without entering into fines, mainly because excessive fine aggregate content will fill voids between coarse aggregates, reducing the crushing efficiency of fines, and at the same time Under the circumstances, it may easily lead to the crushing of the crushing equipment and damage the equipment and reduce the service life of the crushing equipment. The pre-screening process measures can eliminate this hidden danger.

Case three

Common commodity aggregate containing sand making system technology

The proportion of sand in commercial concrete aggregates is generally around 30%, and the amount is relatively large. For the current exhaustion of natural sand resources and the limited mining environment, artificial sand has gradually become the trend and the mainstream (currently large-scale hydropower station construction is mainly used It is an artificial mechanism sand).

At present, the machine-made sand mainly uses the vertical axis impact crusher. Since the vertical axis impact crusher has the function of shaping and crushing, the sand making process is also relatively more, there is a vertical shaft made of sand without coarse aggregate, and some sand making The process takes care of the shaping of the coarse aggregates. This process is the simultaneous production of 5 to 10 mm aggregates with the sand (some processes also take care of shaping all coarse aggregates).

In this case, the broken aggregates and the finely divided aggregates enter the finished product screening workshop, and the finished coarse aggregates with 10 to 20 mm and 20 to 31.5 mm are sieved, and some of them are 10 to 20 mm and 20 to 31.5 mm. The finished coarse aggregates and all 5 to 10 mm aggregates entered the sand production regulation pile. After crushing and shaping by the vertical axis impact crusher, it enters the finished product 2 screening workshop for screening. The aggregates larger than 10 mm are all returned to the sand-adjusting stockpile to form a closed-circuit cycle, and some of them are more than 5 to 10 mm of returning sand-adjusting stockpiles. Closed loop.

In this case, in order to adjust the fineness modulus of the finished sand (adjustment of sand gradation, generally medium sand is used), part of the aggregate larger than 3 to 5 mm after screening is returned to the sand making plant to form a closed circuit.

Summary

With the rapid development of sand aggregates and the expansion of production scale, in order to ensure product quality, the design will be based on market conditions to determine product plans, equipment conditions, and construction sites for planning, and ensure environmental sanitation and safe operation.

A good system must do the following work:

  1. Safety (such as site planning; safety space for equipment maintenance operations; lifting equipment above the equipment; site planning and maintenance access; walkways and ladders on the belt corridors and on each floor.)
  2. Environmental protection (closed-circuit water circulation system and sewage treatment system are used to achieve zero discharge of sewage; dust and dust collection facilities in the plant are equipped with high-efficiency dust removal facilities; roads and grounds in the site are hardened.)
  3. High degree of automation (system through the use of programmed control to achieve fully automatic operation, except for special circumstances, no manual intervention; the system can automatically make fault diagnosis and corresponding treatment, and send out alarm information for the operator to resolve.)
  4. Energy-saving (using low-energy-consuming equipment; for equipment that requires frequent adjustment of medium parameters in the production process, using frequency-conversion speed control; substations should be as close as possible to the central location of the electrical load, etc.)
  5. Easy to maintain, with a dedicated spare parts inventory and repair center.

Equipment Configuration

Knowledge

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