Zhongyu Dingli Anti Blocking Roller Screen Quarry Screening Equipment

Roller screen with feeder for mine crushing line front end pre screening with operation maintenance service

Equipment Overview

The DLGS drum screen, also known as a mud stone separator, is a dry type soil stone separation equipment for the sand and gravel and mining industries. Addressing the pain point of raw materials being mud stone mixtures in sand and gravel yards, which result in poor quality after crushing without treatment, the equipment separates mud and stone without water washing, improving sand and gravel and aggregate quality from the source. The complete machine consists of a box body, bearing housings, reducers, chains, sprockets, screen plates, drums, motors, supports, and other components. The screen surface is composed of multiple parallel drums alternately equipped with screen plates, with the gaps between adjacent drums and the screen box forming the screen apertures. The drums are driven to rotate by chains and sprockets, with rotation direction consistent with material flow, preventing coarse material blockage. Widely used for coarse particle screening in sand and gravel yards, construction waste, excavated soil, mining, and stone, it can also serve as a feeder in addition to screening.

Equipment Highlights

Dry Type Water Free Separation No Washing Required: Mud stone mixtures are separated without water washing, with no water consumption and no muddy wastewater. Suitable for water scarce areas and sites with strict environmental regulations. Stone quality is noticeably improved after separation.

Dual Function as Feeder One Machine Two Uses: In addition to screening, it can serve as a feeder, directly functioning as a front end screening and feeding device for crushers. One machine replaces two processes of screening and feeding, saving floor space and investment.

Chain and Sprocket Drive No Blockage: Parallel drums are synchronously driven by chains and sprockets, with rotation direction consistent with material flow. Materials are screened while moving forward with rolling motion, ensuring smooth operation even with wet and sticky materials.

High Quality Alloy Screen Plates Wear Resistant Long Service Life: Screen plates are manufactured from high quality alloy steel, providing long wear resistance, reducing downtime for replacement, and lowering operation and maintenance costs.

Variable Frequency Speed Control Flexible Installation: Variable frequency motor control allows operating speed adjustment according to material and supporting equipment requirements at any time. The complete machine can be installed horizontally or at an incline, adapting to different site process layouts.

Coarse Particle Universal Strong Adaptability: Commonly used for screening coarse particle materials, with normal screening of sticky materials and good cleaning separation of high soil content materials. Universal application for sand and gravel, excavated soil, construction waste, and mine stone.

Application Scenarios

Dry type soil removal from mud stone mixtures in sand and gravel yards, ensuring finished aggregate cleanliness and gradation. Separation of soil, masonry, and concrete blocks in construction waste recycling, improving recycled aggregate quality. Mud stone separation and coarse material recovery in excavated soil projects and urban infrastructure. Separation of overburden soil and stone, and stone classification in mining, reducing downstream crushing load. Front end coarse particle pre screening and quantitative feeding in crushing and screening lines, achieving one machine two uses.

Process Flow

Customized process for dry type separation and quality improvement of mud stone materials in sand and gravel and mining applications is as follows.

Feeding and Buffering: Feeding equipment delivers mud stone mixture evenly to the feed port, with material bed thickness controlled. Loose mud blocks initially in the feed section to avoid instantaneous overload.

Drum Screening and Conveying: The motor drives sprockets through the reducer and coupling, with chains driving all drums to rotate in the same direction. Material moves toward the discharge end with the drums. Fine soil and sand and gravel pass through the gaps between drums and the screen box, while coarse stone remains on the screen surface moving forward, achieving dry type soil stone separation.

Dry Type Mud Removal No Water Washing: The complete machine has no water spray devices. Relying on drum rotation to tumble and collide materials, mud balls naturally break apart and are discharged through screen gaps, with no muddy wastewater in the production line.

Dual Channel Material Distribution: Under screen fine soil and sand are discharged through the lower channel for collection, usable for backfilling or waste disposal. Over screen coarse stone enters the crushing or aggregate system from the discharge end, with separate flow and separate metering.

Feeding Connection: When used as a front end screening and feeding device for crushers, drum rotation also pushes material flow, with over screen coarse stone continuously fed to jaw crushers, cone crushers, or hammer impact crushers. Variable frequency speed control adjusts feed rate, coordinated with downstream crushing load.

Customization Recommendations: For high moisture sticky materials, increase screen gaps and drum speed to prevent sticking and blockage, with optional front end scraper devices. For construction waste with metal contaminants, iron removers are recommended to protect screen plates. For multiple particle size requirements, multiple machines in series or zone screen gap designs can be adopted.

Service Scope

Scheme Design: Free analysis of material soil content, particle size, and moisture conditions. Customized dry type separation process and model selection are provided according to capacity and finished product requirements, with layout drawings, throughput calculations, and crushing line connection solutions.

Equipment Manufacturing: Box bodies, drums, screen plates, and drive components are precision manufactured, with screen plates undergoing alloy steel wear treatment. No load trial operation before delivery verifies drive and screening performance. Custom drawings and factory inspection supported.

Installation and Commissioning: Engineers provide on site guidance for horizontal or inclined installation, completing chain tensioning, variable frequency parameter setting, and screen gap calibration. Acceptance testing with material verifies separation performance before delivery, with local operator and maintenance personnel training provided.

Operation and Maintenance Entrustment: Global service network and overseas service centers support remote diagnosis. Long term supply of original mining spare parts including screen plates, chains, sprockets, and drum bearings is provided, with annual inspections and replacement guidance.

Project Cases and Data

Benin Construction Waste Recycling Project: Municipal demolition brick, soil, and concrete mixture was processed by the DLGS drum screen for dry type separation, with throughput of approximately 200 tons per hour. Soil and masonry were separated without water, with recycled aggregate soil content reduced to recycling standards. Customer feedback: no muddy wastewater discharge, smooth environmental acceptance, no drum blockage, and screen plate wear life met expectations.

South Sudan Infrastructure Excavated Soil Processing Project: Urban infrastructure excavated soil and mud stone mixture underwent dry type screening, with fine soil backfilled and coarse material recovered, with throughput of approximately 150 tons per hour. Customer feedback: continuous operation without blockage for high moisture sticky excavated soil, with variable frequency speed control easily handling feed fluctuations.

Niger Mine Overburden Soil Stone Separation Project: The DLGS drum screen was configured for dry type separation of open pit mine overburden soil and stone, also serving as a crusher feeder, with throughput of approximately 260 tons per hour. Over screen coarse stone was continuously fed directly to a jaw crusher. Customer feedback: one machine two uses saved one set of feeding equipment and floor space, with reliable chain and sprocket drive and low maintenance.

Note: The above project case data are industry typical reference values. Verification and replacement with actual project data are recommended.

FAQ

Q: Can the DLGS drum screen separate mud and stone cleanly without water? Will high moisture sticky materials cause blockage?

A: The DLGS drum screen uses a dry type separation principle. Drum rotation tumbles and collides materials, with mud balls naturally breaking apart and passing through drum gaps. Soil stone separation is achieved without water washing, suitable for water scarce areas and sites with strict environmental regulations. Drum rotation direction is consistent with material flow, preventing blockage even with high moisture sticky excavated soil, enabling normal continuous operation.

Q: Can the drum screen really serve as a feeder? Will it affect screening efficiency?

A: Yes. The drum screen naturally has conveying and feeding characteristics through drum rotation pushing material. When used as a front end screening and feeding device for crushers, coarse stone is screened and continuously fed to jaw crushers, cone crushers, or hammer crushers simultaneously, with one machine two uses without reducing screening efficiency. Variable frequency speed control adjusts drum speed to precisely regulate feed rate, coordinated with downstream load, saving one set of feeding equipment and floor space.

Q: Are the screen plates wear resistant? Can screen gaps be adjusted as needed? Is daily maintenance complex?

A: Screen plates are manufactured from high quality alloy steel with long wear resistance. The gaps between adjacent drums form the screen apertures, which can be adjusted according to target particle size, with horizontal or inclined installation options adapting to different finished product requirements. The complete machine has a simple structure with reliable drive. Daily maintenance mainly focuses on checking chain tension, screen plate wear, and bearing lubrication, combined with original spare parts and regular inspections, ensuring low maintenance costs.

Get Your Solution

The DLGS drum screen, dry type water free separation of mud and stone, dual function as feeder with one machine two uses, chain and sprocket drive no blockage, high quality alloy screen plates wear resistant and long service life, providing efficient dry type soil stone separation solutions for sand and gravel yards, construction waste, excavated soil, and mining. We provide one stop services of scheme design, equipment manufacturing, installation and commissioning, and operation and maintenance entrustment. Welcome to provide material soil content and capacity requirements for consultation.