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CN-121972395-A - Classifying and screening device for multi-granularity quartz sand

CN121972395ACN 121972395 ACN121972395 ACN 121972395ACN-121972395-A

Abstract

The invention relates to the technical field of ore screening, in particular to a grading screening device for multi-granularity quartz sand, which comprises a rack which is obliquely arranged, wherein a cylinder frame which rotates in a shaftless manner is arranged on the rack through a rotating platform, a screen with gradually reduced mesh is sequentially and fixedly arranged on the outer side of the cylinder frame from right to left, a shaft cylinder is rotatably arranged on the rack, and a speed control mechanism which can prolong the retention time of materials in a partition way through reverse pushing is arranged on the shaft cylinder.

Inventors

  • SUN DONGLIANG
  • WU LIN
  • WANG LIWEI

Assignees

  • 内蒙古天壹成信环保科技有限公司

Dates

Publication Date
20260505
Application Date
20260409

Claims (10)

  1. 1. The classifying and screening device for the multi-granularity quartz sand comprises a rack which is obliquely arranged, wherein a cylinder frame which rotates in a shaftless mode is arranged on the rack through a rotating platform, and a screen with the meshes gradually reduced is fixedly arranged on the outer side of the cylinder frame from right to left in sequence; the speed control mechanism comprises a plurality of first spiral material guide plates, second spiral material guide plates and third spiral material guide plates which are sequentially and fixedly arranged on the shaft cylinder from right to left, and the screen mesh from right to left corresponds to the first spiral material guide plates, the second spiral material guide plates and the third spiral material guide plates in sequence; when the cylinder is rotated in the reverse direction of the rotation direction of the cylinder frame, the reversing capacity of the first pair of materials of the spiral material guide plate is larger than that of the second pair of materials of the spiral material guide plate, and the reversing capacity of the second pair of materials of the spiral material guide plate is larger than that of the third pair of materials of the spiral material guide plate, so that the retention time of the materials is gradually reduced and prolonged; the spiral guide plate I, the spiral guide plate II and the spiral guide plate III are respectively provided with a sieve plate matched with the shape of the spiral guide plate I, the sieve plates are consistent with the sieve mesh numbers at corresponding positions, the shaft barrel is utilized to reversely rotate to drive each sieve plate to be in countercurrent contact with the materials, the materials are screened in an auxiliary mode while being rubbed, the stay time of the materials is controlled step by combining the subareas, and high-efficiency fine screening operation is carried out.
  2. 2. The classifying and screening device for multi-granularity quartz sand according to claim 1, wherein the number of the first spiral guide plates is greater than that of the second spiral guide plates, and the number of the second spiral guide plates is greater than that of the third spiral guide plates.
  3. 3. The classifying and screening device for the multi-granularity quartz sand according to claim 1, wherein the first spiral guide plate has a pitch larger than that of the second spiral guide plate and the second spiral guide plate has a pitch larger than that of the third spiral guide plate.
  4. 4. The classifying and screening device for the multi-granularity quartz sand according to claim 1, wherein the material-receiving surface area of the first spiral material guiding plate is larger than that of the second spiral material guiding plate, and the material-receiving surface area of the second spiral material guiding plate is larger than that of the third spiral material guiding plate.
  5. 5. The classifying and screening device for the multi-granularity quartz sand according to claim 1, wherein the first spiral guide plates, the second spiral guide plates and the third spiral guide plates are uniformly arranged in the circumferential direction of the shaft cylinder, so that the shaft cylinder always rotates in stable dynamic balance.
  6. 6. The classifying and screening device for the multi-granularity quartz sand according to claim 1, wherein a plurality of stirring columns are welded on the first spiral material guide plate, the second spiral material guide plate and the third spiral material guide plate, and the stirring columns stir materials during screening so as to enable the materials to move relatively and collide with each other.
  7. 7. The multi-particle size silica sand classifying screen according to claim 6, wherein the screen panels are detachably connected to the corresponding stirring columns by strapping.
  8. 8. The classifying and screening device for the multi-granularity quartz sand according to claim 6, wherein the material stirring column is positioned on the material receiving side of the corresponding spiral material guiding plate I, spiral material guiding plate II and spiral material guiding plate III, and round corners are arranged at the edges of the spiral material guiding plate I, the spiral material guiding plate II and the spiral material guiding plate III.
  9. 9. The classifying and screening device for the multi-granularity quartz sand according to claim 1, wherein a synchronous motor is fixedly arranged on the right side of the frame, and an output shaft of the synchronous motor is fixedly connected with the shaft cylinder.
  10. 10. The classifying screen device for multi-granularity quartz sand according to claim 1, wherein the outer sides of the first spiral guide plate, the second spiral guide plate and the third spiral guide plate are close to the inner side of the cylinder frame but not in contact with the inner side of the cylinder frame.

Description

Classifying and screening device for multi-granularity quartz sand Technical Field The invention relates to the technical field of ore screening, in particular to a classifying screening device for multi-granularity quartz sand. Background Quartz sand is used as an important industrial mineral raw material, is widely applied to industries such as glass, casting, ceramic, building, water treatment and the like, and different purposes have strict requirements on the granularity distribution of the quartz sand, so that the quartz sand is required to be subjected to efficient and accurate screening classification so as to separate products meeting different granularity specifications, and the roller screen is one of widely applied equipment in quartz sand classification screening due to the characteristics of simple structure, large treatment capacity, stable operation and the like. When the drum screen works, materials are continuously input from a feeding port at the high end of the drum, the drum is driven by a driving device to slowly rotate, screens with different meshes are arranged on the drum body in an axial partition mode, the meshes of the screens are gradually reduced from the feeding end to the discharging end, fine particles are screened out through a high-mesh screen near the feeding end to become the product with the finest particle size in the process that quartz sand rotates along with the drum and moves axially, the rest materials continue to advance, secondary fine particles are screened out through a subsequent screen with a coarser mesh, and the coarsest particles are finally discharged from the discharging end by analogy, so that sequential screening of quartz sand in a fine-coarse order is realized. However, in actual operation of the conventional drum screen, since the high-mesh screen of the screening area of the finest particle size is close to the feed inlet, the material to be fed at this time is an original mixture containing all particle size levels, and during rotation and axial movement in the drum, the fine particle material is very easily wrapped in the thicker material layer or adhered to the surface of the coarse particles, so that the fine particle material is difficult to effectively contact and pass through the high-mesh screen, and is largely moved to the coarse screen for regional blanking, so that screening quality is reduced. Secondly, the materials mainly depend on the action of gravity in the roller and the limited rolling of the roller, so that the materials slide downwards along the screen surface and move along the axial direction of the roller, the diffusion and layering effects of the materials are not ideal, and the phenomenon that fine particles are blocked and wrapped by coarse particles is further aggravated. While the prior art can macroscopically control the average speed of the material passing through the roller by adjusting the overall inclination angle of the roller and the rotation speed of the roller, the adjustment mode is global and synchronous, independent and accurate delay control cannot be performed on the material residence time of different screening areas, especially the most fine fraction screening area which needs longer time to separate, if the overall flow rate is reduced to ensure the fine fraction screening effect, the overall screening productivity is reduced, otherwise, if the flow rate is increased to improve the productivity, the screening quality of the fine fraction is sacrificed. Therefore, the classification screening device which can regulate and control the material flow rate in a partitioning and accurate mode, strengthen material diffusion and give consideration to screening quality and screening capacity is developed, and has important practical significance. Disclosure of Invention In order to solve the technical problems, the technical scheme is that the classifying and screening device for the multi-granularity quartz sand comprises a rack which is obliquely arranged, a cylinder frame which rotates in a shaftless mode is arranged on the rack through a rotating platform, a screen with gradually reduced meshes is sequentially and fixedly arranged on the outer side of the cylinder frame from right to left, a shaft cylinder is rotatably arranged on the rack, and a speed control mechanism which prolongs the material residence time through material reverse pushing partition is arranged on the shaft cylinder. The speed control mechanism comprises a plurality of first spiral material guide plates, second spiral material guide plates and third spiral material guide plates which are sequentially and fixedly arranged on the shaft cylinder from right to left, and the screen mesh from right to left corresponds to the first spiral material guide plates, the second spiral material guide plates and the third spiral material guide plates in sequence. When the cylinder is rotated in the reverse direction of the cylinder frame rotation d