JULI Engineering

The ship loader is a kind of large bulk-material handling machinery for load-out operating. In general, the ship loader consists of belt conveyor with cantilever crane, belt conveyor for transition, flexible chute tube, tripper car, travelling device, portal frame, tower frame, pitching device, slewing device, and etc. The ship loader plays an important role in energy, electrical power, metallurgy, port and etc. The ship loader could be operated with continuous ship-loading in general. So the continuous material flow must be provided, such as the continuous feeding of bucket wheel stacker reclaimer in stock ground of coal wharf. The development of trade integration promotes the demand of handling bulk materials. The seaborne volume of iron ore, coal, grain and etc is rapidly increasing. With this development, the continuous renewal of ocean transport ship occur. Accordingly, the demand of bulk material handing is increasing with continuous development. The ship loader manufactur

The sweeper, as one of the conveyor components , has played an important role in conveying materials of belt conveyor. According to the actual processing conditions, if the attachment adheres to the conveyor belt. There would be two negative factors. If the attachment adheres to the belt, the belt conveyor would convey another materials with attachment, which would result in the bad quality of the another materials. This is not allowed for the strict quality requirements. Besides, the attachment would do damage to the belt conveyor. When the belt conveyor transporting the materials and some materials could not be cleared by sweeper, the residual materials may enter into the shell of the roller. As a result, the radial load and axial load of the bearing block would become large, which would increase the abrasion of the bearing. If the attachment enter into the bend pulley, the surface of the pulley would adhere to more and more materials, which would result in the belt deflection and

As we all know, the stacker reclaimer , as one of the mining equipment, has many components. Among most components, the bucket wheel is one important component. The basic introduction is as follows: Bucket-wheel device is mainly consists buckle-wheel body, reclaiming hopper, frame, supporting roller, side catch wheel, driving sprocket, redirection sprocket, tensioner sprocket, adjustable arc stock guide, bucket-wheel driving device and other parts. The dual bucket-wheel device is installed on the main beam, the two bucket-wheel device are connected together by the bucket-wheel connecting beam. In running, the bucket-wheel body and the reclaiming hopper on it will rotate back on the main beam rolling with the wheel body center, and the trolley of the bucket-wheel device will drive the bucket-wheel body and the driving device etc. to reciprocating motion to excavate the materials on the main beam. The excavated materials by the reclaiming hopper will rotate back to the upper part alon

In the coal power plant, there would be dust in some place. The dust is resulting from the raising dust with wind blowing and handling coal of bucket wheel machine. In generally, there would be three methods of avoiding dust. The first one is spray dust-removal in sealing house, but the cost is high. The second one is adopting wind break wall, with disadvantage of high cost. The third one is using the spray gun to remove the dust, with advantage of low cost and high efficiency. However, there will be a problem of prior-period investment. If choosing large spray gun, the range and cover area is large. The quantity of large spray gun is less than small spray gun. However, the large spray gun has larger volume. The price of the large spray gun is higher than small spray gun. To balance this contradiction is difficult and important. The most important thing is the design of the spray gun, which needs designer to consider the earlier investment and the low cost factor. The spray gun is easi

Idlers, part of belt conveyor , are used for supporting belt and materials. They can be divided into transition idlers, groove idlers, groove forward-inclined idlers, impact idlers, v type forward tilt idlers, parallel return idlers and carrying & return self aligning idlers. Each group has features of advanced structure, light weight, small transmission resistance, good sealing and long life etc. When the belt conveyor is designed as the pipe conveyor , the idlers also have some changes accordingly. Transition idlers: Transition idler group is composed of 3 rollers, trough angle is respectively 10 degrees and 20 degrees. It is used for transition supporting belt near head & tail pulley. Trough forward tilt idlers: Trough forward tilt idlers is composed of 3 idlers with 30 degrees trough angle and 1.5 degrees forward tilt angle. It can protect conveying belt from swaying . Impact idlers: Impact idlers is composed of 3 rollers with rubber ring. They would be installed unde

The belt conveyor is the main transporting equipment for bulk materials. With the development of the industry and technology, the application range is becoming wider and wider. The future direction of the belt conveyor is long distance and large conveying volume. The belt conveyor has opened the bright prospect for the work of the transporting the bulk materials. 1. The belt conveyor design system for long distance is competing with the rail, ship and pipe transporting. The advantages of adopting the belt conveyor include efficient transporting, protecting the materials and good adaptability to the terrain. 2. About the drive mode, the obvious feature is the longitudinal dimension. The belt conveyor must be equipped with the enough drive capability if overcoming various resistances. 3. The cost of this kind of conveyor system is large with investment volume of millions dollars or even more. So it is so important to design the reasonable structure, which could reduce the running co

The forging technology could be divided into free forging, modular forging, rolling ring, and special forging. The free forging: Free forging refers to a method of forging where the heated iron/steel is anchored and then formed by hammering, pressing, or other methods. Free forging can flexibly form the shape of each product, and is suited to making large components or for diversified small-quantity production. The die forging: This forging method is suited for the production of industrial product components. The die forging could be divided into hot die forging, warm forging, and cold forging. The warm forging and cold forging is the developing direction in the future, which standards for the level of the forging technology. Rolling rings: The rolling rings refer to the ring-shaped work pieces with different diameters manufactured by special ring rolling machine. Some wheel shape pieces would be used in the automobile hub and train wheel. Special forging: The special forging

Belt Conveyor is widely used in the field of mining, metallurgy, coal, port, power plant and building material. It has the characteristic of high capacity, low power consumption, long distance transportation, low noise, environment friendly and low cost of maintenance. The scraper conveyor is a large-scale conveyor device, using scraper chain traction to convey materials. It is a kind of mining equipment . Sometimes, the pipe conveyor would coordinate with scraper conveyor. The scraper conveyor consists of hand piece, middle part, drive end unit. The scraper conveyor could be applied in horizontal transportation, also inclined transportation. If the scraper conveyor conveying the materials in upward direction, the coal bed pitch could not be over 25 degrees. If the scraper conveyor conveying the materials in downward direction, the coal bed pitch could not be over 20 degrees. If the coal bed pitch is very large, the anti-skid device should be installed. The principle of scraper conv

The portal scraper reclaimer and boom scraper reclaimer are the main types. The differences are as follows: 1. The portal reclaimer has reasonable structure. The partial weight of portal frame and scrapper reclaimer is supported by the wall(blocking materials). In this way, the stress state under the central cylinder, and the running of the portal scraper could operate smoothly. And the boom scraper reclaimer's load could be transmitted to the central cylinder. In this way, the design and manufacturing difficulty is large and the stability of the equipment is bad. 2. The portal reclaimer has compact structure, and there is no need to design the balance weight. The space occupied under the portal reclaimer is small. The boom reclaimer should be designed with large balance weight. 3. The portal reclaimer need the circle track in the wall(blocking materials), and the related cost of setting circle track. The balance weight load of the boom scraper reclaimer is central under t

The magnetic separator is widely used in resources recovery, lumbering, mining, chemical, ceramic industry, food and other industry. As one of the mining equipment, the magnetic separator is suitable for handling magnetite, magnetic pyrite, calcined ore, kibdelophane with granularity under 3mm. Besides, the magnetic separator could be used in the deironing of coal, non-metal ores, building materials. And the magnetic separator could be used in the coal power plant to filter the condensate water. There are many factors influencing the efficiency of the magnetic separator. The two main factors are as follows: The feed size is one of the important factors. If the feed size is small, individual separation of ores will be high, reaching the good separating index. Otherwise, the individual separation of ores will be low, making the concentrate grade worse. So it is important that the ores handled by magnetic separator could reach the degree of individual separation. The pulp density is th

Stacker reclaimer is one of the mining equipment, there are many types of stacker reclaimer such as portal, bridge and boom type. Here the features of portal and bridge type stacker reclaimer are introduced. The portal stacker reclaimer is a efficient loading and unloading machine, which is mainly used in stockyard for bulk materials. The features of portal stacker reclaimer are as follows: The lateral section of material pile is trapezoid, which increases the use ratio of stockyard. The large span could be realized easily, with the maximum span reaching 65m. The electrical control system is simple without frequency control. The hoisting mechanism adopts winding engine, with simple structure and easy operation. The automation of the equipment could be easily realized. The bridge stacker reclaimer is suitable for long stockyard, which is applied in port, wharf, mining, cement plant, coal storage yard, coking plant, power station and etc. The features of bridge stacker recla

The stacker reclaimer is one of the common mining equipment . It is developed from the bucket wheel excavator. And the travelling device of bucket wheel stacker reclaimer consists of driving carriage, driven bogie, equalizing beam, anchor, rail clamping device and other components. The limit switch is set with the travelling device. And the touch device is set in the two sides of the rail. When the limit switch touches the touch device, the power would be cut off. In order to avoid the situation that the boom of stacker reclaimer touches the materials pile, the travelling device could operates with high speed when the boom is paralleled with the rail. And this limit device is set on the slewing device. The position detector also be set in the travelling device, which could detect the location of the equipment. The detecting result could be showed in the operator's cab and central room, and then could be transmitted to the computer to realize the automatic control. The rail cla