1. Summary The main structure of drum vibrating screen is sievecylinder. It is made up of several circular mesh and it is inclined state withthe ground. The external is sealed by sealing isolation cover in order toprevent environmental pollution. Sieve cylinder can rotate under a certainspeed by speed deceleration system andmaterials will be separated by sieve cylinder from top to bottom. Fine materialsdischarge from the bottom part of the front of sieve cylinder. Coarse materialsdischarge from the end part on the bottom of sieve cylinder. Drum vibratingscreen can have comb sieve institutions. In the process of screening, it canachieve the effect of cleaning screen body uninterruptedly by relative movementof comb sieve institutions and drum sieve cylinder. Then sieve cylinder willkeep clean, non-stick, non-clogging, not affect the sieve effect in the wholeworking process from beginning to the end. Drum vibrating screen can be graded 1-4 from fine tocoarse according to different grading requirements. Materials from fine tocoarse will be sieved from the first mesh to the last. Materials which arebigger than the last screen mesh will discharge from discharge port. Drum vibrating screen have the following advantages:run slowly and uniformly; impact vibration is small; work smoothly; be easy forinstallation, sometimes it is not need special base; can place directly on theflat ground or floor and under the stock bin. It is easy for obturation anddust collection, small and simple maintenance, long service life. It is theoften used equipment in the classification of fireproofing, coal, river sand,sand stone and so on. 1. Characteristics 1.       Wideadaptability of materials Drum vibrating screen is widely used in all kinds ofmaterials screening. No matter it is fault coal, coal slime or soot and othermaterials, drum vibrating screen can sieve them smoothly. 2.       Simpleand multiple feeding way The feeding inlet of our drum vibrating screen canbe designed according to site requirements. No matter it is belt, funnel orother inlet methods, drum vibrating screen can feed smoothly without takingspecial measures. 3.       Highscreening efficiency This equipment can have comb sieve institutions. Inthe process of sieving, no matter how dirty and miscellaneous the materials arein the sieve cylinder, they can be screened, thereby improving screeningefficiency of the equipment. 4.       Largequantities of screening, easy to large-scale In the same size, the circle area is larger than thearea of the other shape. So, the screening effective area is bigger so thatmaterials can fully touch screen mesh. Then the screening amount will be largerper unit time. Also, its structure is simple and layout is convenient so thatit is easy to large-scale. 5.       Smallself energy consumption The motor power of our drum vibrating screen issmall. It is one half or one third of other screens. The run time is only onehalf of other screens when dealing with the same amount of materials. So, it islow energy consumption. 6.       Goodworking environment The whole sieve cylinder can be sealed by sealingisolation cover so that it can clear thoroughly the phenomenon of dustexplosion, massive stars splashing and so on in the process of screeningcirculation. Thus, it can avoid pollution of the working environment. 7.       Lownoise When drum vibrating screen is in operation, therotary speed is small and it is isolated from the outside world by sealingisolation cover. Thus, noise cannot be passed to the external and can reducethe noise of equipment. 8.       Longservice life, small amount of maintenance Drum vibrating screen is made up of several circularmesh. Its total screening area is much larger than the other screens. Also, ithas high screening efficiency and short running time. So, it has a longerservice life, less wearing parts and small amount of maintenance. 9.       Convenientmaintenance The top of sealing isolation cover can be opened.And it does not affect the normal operation of the machine. So, it is veryconvenient to maintain.