The belt conveyor roller could adopt the black rubber belt, which could be used for transporting materials in bags, sand and gravel, coal briquette and etc. Most EPC companies could realize the positive and negative transportation through increasing gib block below. Besides, we could realize the transportation of bulk materials by adding the dam-boards. The roller is the important part of the conveyor. The roller has many types. The quality of roller directly influences the quality of conveyor. The roller determines the performance of conveyor and service life of conveyor. The structure of roller set confirms the load bearing of conveyor. The basic requirement of roller includes reasonable structure, wear well performance, better dustproof performance, good waterproofness and reliable performance. The bearing should have good lubrication, light weight, small steering resistance, low fabricating cost and smooth surface. The function of roller is supporting conveyer belt and the materials on belt, ensuring the smooth running. The flute profile forms, which could increase the freight volume and avoid the scattering of materials. There are many rollers for one belt conveyor. So the quality of rollers greatly influence the running resistance, service life, operating cost and etc. The rollers of belt conveyor are different from the unpowered pulley, although they are similar in form and appearance. The rollers of belt conveyor have large bearing capacity. The rollers should be located in dry environment and changed timely. In general, the belt conveyor will be used together with stacker reclaimer, screw conveyor, pipe conveyor, and other equipment.
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In general, the apron feeder could be divided into three types including heavy, medium, light type, which is the continuous transportation machinery widely used in mining, metallurgy, construction materials, ports, coal and industrial and mining enterprises. The apron feeder is mainly used as the storage bunker to continuously supply the materials or transfer large material to crushing machine or batching apparatus. The apron feeder is one of necessary machine for handling materials in the process of continuous production. Sometimes some EPC companies would choose stacker reclaimer, belt conveyor, and etc to complete the transportation of materials. The light apron feeder is suitable for transporting materials under 160mm granularity in short distance. It is used for continuous feeding in mine, mill plant, chemical industry, cement, building materials. The light apron feeder could be installed horizontally or obliquely. The maximum inclination degree is 20, which is suitable for the materials with loose density under 1200kg/m3 and temperature under 350℃. The middle-sized apron feeder is suitable for transporting materials under the feed size of 400mm in short distance. It is used for continuous feeding in mine, mill plant, chemical industry, cement, building materials. The middle-sized apron feeder could be installed horizontally or obliquely. The maximum inclination degree is 20, which is suitable for the materials with loose density under 12400kg/m3 and temperature under 400℃. The heavy apron feeder is the auxiliary equipment of the transporting equipment. The heavy apron feeder could be installed horizontally or obliquely. The maximum inclination is 12 degrees. In order to avoid that the materials would directly hit the apron feeder, the stock bin should not be in the condition of emptying. The main faults of reclaimer focus on the bucket-wheel and running mechanism. The bucket-wheel component of each reclaimer includes reclaiming hopper, wheel body, rollaway nest, chain wheel, tension device, actuating device, supporting roll, side roll, supporting wheel of trolley. The main fault form is the sharp wear of supporting wheel and supporting roll. The reasons and solutions are as follows: The water content of materials is large. The freezing of base and material pile would result in the rapid change of materials. The solution is making the reasonable proportion to the dry and wet materials, reducing the freezing of materials base. If the clearance adjustment check is not done timely, the interval will be over the standard. The solution is measuring the interval in regular time. If there is something wrong, we should arrange the related persons to make adjustment or make replacement. The rollaway nest surface evenness of wheel body exceeds the standard, which is also one of the reason. The solution is making change according to the usage period. If the interval between travelling frame structure and travelling wheel could not be checked timely, the wear would lead to the failure of standard. The solution is making change according to the usage period. In most cases, the reclaimer would coordinate with other equipment such as belt conveyor, ship loader and apron feeder to complete the materials handling process. The conveyor belt is the bearing carrier and traction component of the belt conveyor(not including steel wire rope traction). The conveyor belt should have the carrying capacity and enough strength of extension. The framework and coating make up the conveyor belt. The coating is divided into upper cover glue, edging glue, and below glue. The framework of conveyor belt is made up of various fabrics or steel wire ropes, which are the backbone layers of belt bearing the total load of working. In this way, the core materials of belt should have enough strength and stiffness. The coating is used to protect the core materials from damage of harmful medium. The upper cover glue is thick, which is the bearing layer of conveyor belt. It directly contacts the materials and bears the impact of materials. The below glue is a contacting layer of belt and idler, which bears pressure. In order to reduce the resistance, the below glue layer is thin. The edging glue could protect the belt core material from mechanical damage. The steel wire rope's quality is the main factor determining the service life of conveyor belt. It should has following features: The steel wire rope should have the high rupture strength. The core layer and rubber should have higher adhesive force, which has important meaning to the vulcanized joint. The fatigue resistance should be adopted by the steel wire rope. Besides, the steel wire rope should have better flexibility. Most EPC companies would pay more attention to selecting the high quality of equipment to realize the largest efficiency, such as stacker reclaimer, stone crusher, screw conveyor, apron feeder and etc. The development of modern logistics is the precondition of creating and development of automated warehouse, which is suitable for the development of industry and technology. The modernization production promotes the socialization, specialization and specialization of production. The mechanization and automation require that the supplying of goods and materials should be timely, quick, and accurate. In this way, the development of automated warehouse is promoted. For the arrangement of space, we should make classification first, knowing the using direction of each location. Then we should assess the importance and design the layout. If the space is limited not changing the planning and design, we should let the present space's use ratio fully used. The requirements of goods shelf are high. The appearing of automated warehouse drives the development of goods shelf. Good automated warehouse should follow the principles as below. The high performance and low cost is considered. The simple equipment should be adopted, which could simplify the whole logistics system. The handling times should be reduced to increase the whole efficiency. The safety of persona and system should be fully considered. The unmanned degree should be high to reduce the manual intervention. The automated warehouse should conform to the national standard. The system integration enterprise should have the better service quality. The flexibility should be high, which is easy to improve later. In specific conditions, above principles have inter influence. The selection of related equipment is so important, such as screw conveyor, stacker reclaimer, automated robot, pipe conveyor, and etc. Most EPC companies would reasonably choose the related equipment to reach the largest efficiency. During the operation of rotary kiln, the fluffiness phenomenon of contact surface between riding wheel and tyre will appear. If this problem could not be solved in time, worse problem will occur. The reasons are as follows: The bad contact and large specific pressure will lead to the problem. When the center line of supporting wheel inclines seriously, the riding wheel and tyre could not get the uniform contact. Sometimes, the strained condition is different. Some location gets large pressure while other locations get small pressure. The contact surface width between riding wheel and tyre is small in actual production, which would result in the damage of surface. At the moment, the riding wheel should be adjusted to reduce the inclination degree and increase the contact area with tyre. When the riding wheel receives the large radial pressure, the specific pressure between riding wheel and tyre becomes large. So we should reduce the pressure of riding wheel in time. Because of poor mobility, the riding wheel would lift. Once the rotary kiln plays, the lifting space of tyre and rotary kiln could be scabbled with lathe tool, keeping the flexibility of barrel. The increasing of sliding friction and false adjustment would result in this problem. The sliding friction would lead to the wear of supporting piece. If the center line of riding wheel is adjusted to splayed, the adverse force would damage the surface. We should adjust the riding wheel. In the following blogs, the mining equipment would be introduced such as apron feeder, stacker reclaimer, belt conveyor, crushing machine and etc. With the rapid development of national infrastructure and industrial construction, the type of stone crusher and related manufacturers emerge in endlessly. In this way, the users have more choices. At the same time, the customers do not know how to choose the suitable stone crusher. For a gravel plant, the stone crusher with different production and function will be used to meet the production requirements. But how to choose to suitable stone crusher which would meet the production requirements? Character of Stones The hardness, silt content and water content of stones are the important data for selecting the equipment. If the hardness of stone is large, we could choose jaw crusher or gyratory crusher. If the hardness of stone is small, we could choose impact crusher, which could save the cost and increase the production efficiency. Requirements on Product Quality The requirements of granularity and stone shape of finished product also influence the selecting of the stone crusher. If the product crushed fails to the requirement, the screening machinery should be equipped. In most projects, if the dust content is high, the sand washer should be set. Application of Finished Products The highway, high-speed rail, bridge and other constructions have different requirements on the sand gravel aggregate. According to the demands of the user, we choose the suitable stone crusher. When users choose the stone crusher, they could consider above points. Also they could find professional manufacturer to select the best equipment. Most EPC companies would like give the professional advice to the user in selecting mining equipment system such as stacker reclaimer, apron feeder, pipe conveyor and etc. In summer, the high temperature will bring difficulties to the usage of mining equipment. The user should prevent high temperature of mining equipment in advance. What problems will appear in summer? The high temperature of water tank and engine would result in the damage to the cooling system, hydraulic system, circuit, and tire. In this way, the use ratio of mining equipment would be reduced and failure rate would be increased, which increases the construction cost. We should do high temperature protection of mining equipment in advance. Firstly, we should maintain the mining equipment. We should change the engine oil of apron feeder, stacker reclaimer, belt conveyor, screw conveyor. The belt should be changed or adjusted. We should check whether the performance of fan, water tank, generator, compressor is reliable. If necessary, we should do maintenance or change. Secondly, we should increase the viscosity grade of the equipment in high temperature zone. The cooling system and fuel system should be checked at the same time. The aged electric wire, plug, pipeline, screw, and pipe line should be changed in regular, avoiding the leakage of oil. The dust should be cleaned to guarantee the high efficiency and better heat dissipation. Thirdly, we should charge the accumulator in time. The charge current should be reduced accordingly. The connection of circuit should be reliable. The fuse capacity should conforms to the standard of safe usage. What's the most important is that the equipment should be with one or two fire extinguishers. Finally, the equipment should be placed in the shady and cool zone, avoiding the solarization. The combination of forced cooling and natural cooling could increase the efficiency of equipment in high temperature. The EPC means that one company undertakes whole process of work including investigation, design, procurement, construction, commissioning (completion and acceptance) and etc from the end user. Besides, the working content, task and responsibility will be showed in the contract. Most EPC companies would know the following contents, such as EPC company involving Automated Warehouse According to the different designing scope, EPC mode has many forms including EPC with all designs, EPC with partial designs, EPC with relay mode design and etc. Under the EPC with all designs, the user would propose the functional requirements for the future project. The EPC companies would complete all designs, purchasing, construction, pre-operation and other work. Under the EPC with partial designs, the user need to propose the functional requirements and do some designs. The EPC companies would complete the rest of working such as detail of construction/Detail Design, purchasing, construction, pre-operation and other work. Under the EPC with relay mode design, the user will let EPC companies to find designing institute to design a part, realizing the relay of design. The advantages of doing this are as follows: The consistency of project could be realized, which increases the designing speed. If there is something wrong in design, the responsibility is clear. Other mode includes EP, EPCs, EPCm, EPCa. The stacker reclaimer is a continuous bulk materials handling equipment, which is widely used in port, metallurgy, cement, steelworks, coking plant, coal factory, power station and etc. Sometimes, the stacker reclaimer coordinates the belt conveyor, apron feeder to complete the materials handling process. The center pillar is regarded as the center of cantilever stacker. One end is steel structure belt conveyor and the other end is balance weight. The stacker is connected with rotation device, realizing the rotation through the engaging between small pinion of rotary actuator and gear ring of large bearings. The materials entering into the round yard would be unloaded to the stock ground through the head of cantilever belt conveyor. The materials probe is set in the two sides of discharge opening. If the top surface of material pile touches the probe, it shows that the material pile has reached the designed height. The pitching of hydrocylinder is adopted by stacker, whose advantage is that the cantilever could pitch according to the height of material pile. The materials fall could be reduced, avoiding the flying of dust. The cantilever belt conveyor is installed in the front and back cantilever, which rotates along with cantilever. The middle hopper mainly consists of upper hopper, nether hopper, upper feed channel, nether feed channel and etc. The upper hopper and nether hopper are installed in the upper rotation. while the upper feed channel and nether feed channel are installed on the cantilever. During the pitching, the feed channel is in sealing condition, which reduces the pollution to the environment. |