A bauxite manufacturer in australia found us through google and told us that their apron feeder had a unloading problem. It is difficult to improve the design of apron feeder for sale by investigating the field application of alumina ore washing project. The chain plate is designed as a flat plate and the driving type is hydraulic motor. The improved structure is more suitable for bauxite which has high viscosity and high moisture content. It overcomes some problems in the field and has good application effect.
The alumina washing project in australia is a newly expanded concentrator, and the feeding equipment is apron feeder for sale designed by a foreign company. The specifications and models are 1500mm× 24000mm, the feeding capacity is 300t/h, and the driving type is hydraulic motor. The on-site process is to evenly transport the bauxite with a water content of about 15% to the cylinder washing machine for washing through the heavy plate. Through the investigation of the actual application and combined with the specific working conditions, the newly designed apron feeder for sale was optimized and improved.
1. Existing problems
The site heavy plate adopts the traditional structure, and the chain plate device is set up the pusher square steel, which is caused by the high viscosity of the bauxite material
When unloading is difficult, the chain plate adhesion material returns with the chain plate.
2. The return roll is designed for 600-800mm interval arrangement, but the chain plate between the two return rolls is too large in the actual operation process of production, the equipment often "Stuffy", and even damage to other parts of the accident often occur.
3. The back-up roll is designed to be horizontally arranged in four rows, but the middle two rows cannot reach the designed life due to the high water content of materials, and the site working condition is extremely harsh, resulting in difficult maintenance.
According to the problems existing in the production and operation process of apron feeder for sale, the driving type, chain plate device and support structure of the heavy plate were optimized and designed. The improved structure is very easy to use.
In the original design, the square steel on the chain plate can reduce the impact of large materials on the heavy plate and extend the service life of the heavy plate, while the bauxite has a small impact on the chain plate due to its large viscosity, small particle size and other factors. After the installation of the square steel, the chain plate structure is easy to accumulate viscous materials, and the scraping device cannot completely scrape the materials on the chain plate. Now the chain plate structure is improved to the plate structure, the square steel on the chain plate in the original design is removed, and with the rubber sheet type scraping device installed below the head of the heavy plate, the receiving device of the equipment is also improved accordingly, so that the chain plate in the return journey, the adhesive material is scraped by the scraping device, and the material is collected through the hopper 2-3). In the original design, the return roller adopts 600-800mm interval arrangement, but the middle interval of the return roller is improved to 400mm to shorten the distance between the return roller, prevent the chain plate from hanging too large, reduce friction, and prevent the "Stuffy car" Accident. The original design of the back-up roll adopts four rows of horizontal layout to facilitate the maintenance and replacement of the support roll. However, due to the high water content of the material on site, the support roll is eroded by water leakage for a long time, which affects the service life of the support roll. Now the support structure of the chain plate is changed to the hollow-shaft through-length roller type. In the past, the bearing seat type of the through-length roller is cast aluminum bronze bearing bush type, which has poor lubrication effect in the field, resulting in increased power consumption and even failure of the back-up roll. In this design, apart from the effective width of the bearing seat chain plate, the integral bearing seat aligning roller bearing is adopted, basically eliminating the influence of the chain plate water leakage on the bearing lubrication. The hollow shaft through the length roller makes the middle two rows of support roller without bearing structure, the middle support roller can not be maintained resulting in reduced service life has been successfully solved. The driving mode is improved to hydraulic motor drive, which has the advantages of stepless speed regulation, small space and easy process control. The biggest characteristic of hydraulic drive is suitable for low speed and heavy load environment. The hydraulic transmission system works stably and brings less wear to the transmission system, thus improving the reliability and service life of the system. Perfect protection system, easy to maintain and operate. Hydraulic power station is provided with protection points, including oil filling pressure protection, filter blocking protection, oil level protection. As long as the normal supply of hydraulic oil and cooling water to the system, the system maintenance workload is small. Hydraulic drive mode transmission arrangement is more flexible, the low speed of the motor adopts the hollow shaft locking disc and torque arm of no key, no foundation installation mode, which can protect the drive shaft and save installation space to a greater extent. The operation site situation is shown in figure 2. The maintenance is simple, the hydraulic oil is changed once a year, and the driving device is rarely stopped for maintenance.
After the improvement of the structure of the equipment, the phenomenon of adhesive material has been obviously controlled, with the scraping system, well solve the problem of material adhesion; reduce the distance between the return roller, "Stuffy car" Accident does not happen again; the service life of intermediate support roll is obviously improved. The equipment has been running so far, the use effect is good, greatly improve the original design structure of many problems.
The application of apron feeder for sale in this customer's alumina project, the structure of apron feeder for sale is partially improved, and the hydraulic drive mode is adopted, which opens up the market for the application of apron feeder in the ore washing plant and accumulates experience for the application of hydraulic drive in this equipment. Corrected in the past large water content material conveying deficiencies.
