trommel screens

trommel screens

Vermeer trommel screens were designed for efficiency and ease of maintenance. The large feed hopper sits low to the ground, making it easy to feed material into the screening drum with a variety of loading equipment.

Vermeer trommel screens were designed for efficiency and ease of maintenance. The large feed hopper sits low to the ground, making it easy to feed material into the screening drum with a variety of loading equipment.

used trommel drum for sale. sun hong equipment & more | machinio

used trommel drum for sale. sun hong equipment & more | machinio

Product Description Mining portable small trommel screen for sale Brief Introduction S mall trommel screen also known as rotary screen, which is a mechanical screening machine used to separate materials, mainly i...

1.Trommel screen is a special screening equipment used for the power plant, coking plant, building material, metallurgy, chemical industry, mine and other industries. 2.This new design trommel screen overcomes th...

1.The Scrubber Trommel is divided into single-spiral scrubber and double-spiral scrubber. 2.Scrubber Trommel applys to separate ore in black and nonferrous metal mining. washes the raw ore by water to remove the...

Product Description Yongli gold washing plant used to mine gold mixed with sand in palaeochannel, palaeo-riverbed, alluvial placer, tailing after ball milling, and diamond and zirconium in raw ore. If the percent...

Products Description Trommel Screen LZZG trommel screens are designed to minimize setup time and be easy and convenient to service. We havperfected the ability to size and customise trommel screens with different...

Product Description Trommel Screen for Washing has wide range of sizes and capacities, Trommel Screen for Washing is a mechanical screening machine used to separate materials. Trommel Screen for Washing consist...

Product Description Trommel Screen for Washing has wide range of sizes and capacities, Trommel Screen for Washing is a mechanical screening machine used to separate materials. Trommel Screen for Washing consist...

Product Description Trommel Screen for Washing has wide range of sizes and capacities, Trommel Screen for Washing is a mechanical screening machine used to separate materials. Trommel Screen for Washing consist...

Product Description Yongli gold washing plant used to mine gold mixed with sand in palaeochannel, palaeo-riverbed, alluvial placer, tailing after ball milling, and diamond and zirconium in raw ore. If the percent...

Products Description Trommel Screen LZZG trommel screens are designed to minimize setup time and be easy and convenient to service. We havperfected the ability to size and customise trommel screens with different...

Products Description Trommel Screen LZZG trommel screens are designed to minimize setup time and be easy and convenient to service. We havperfected the ability to size and customise trommel screens with different...

Products Description Trommel Screen LZZG trommel screens are designed to minimize setup time and be easy and convenient to service. We havperfected the ability to size and customise trommel screens with different...

621st shredder - screen machine

621st shredder - screen machine

The 621ST Shredder Trommel is a self-contained, diesel-powered, track-mounted portable screening plant designed to separate topsoil, compost and green waste type products.It features wireless remote controls and a direct open-feed hopper with a large 6 x 21 (1.8m x 6.4m) trommel drum, creating 340 square feet (31.6m2) of screening area.

The 621ST comes standard with a hammermill shredder that can be raised out of the way when not needed. It also features an adjustable, removable and remote-controlled tipping grizzly. It is truly a landscapers ultimate high-capacity processing plant.

disadvantages of trommel screens | aggregates equipment, inc

disadvantages of trommel screens | aggregates equipment, inc

There are a number of available material screening solutions. Material specifications will dictate the type of screening equipment that is most efficient for the given process. Trommels are one of the most commonly deployed screens for a number of jobs from compost to municipal solid waste. However, despite their wide usage, trommel screens have a number of disadvantages that can make them less than ideal.

While trommels are frequently used to process materials, they do so inefficiently. Trommel screens are simple in design: a rotating cylindrical drum with perforation cavities which allow undersized material to pass through the screen.

The advantage of this design is a relatively lower cost. In fact, small, basic trommels can be made at home with relative ease. However, for heavy duty industrial applications, that same simplicity results in an overall inefficient design.

When compared to other solutions, like vibrating screens, trommels simply cannot handle the same volume of materials. While rotating, only a portion of the screen is being utilized for sizing. Comparatively, the entire screen surface of other material screening solutions can effectively size materials. This not only places the trommel drum at a volumetric disadvantage to other screening equipment, but can also lead to additional material flow concerns.

When screening multiple particle sizes or when material begins to back up, trommels also have the disadvantage of plugging. Plugging occurs when a larger feed material gets stuck in the screen aperture. This can lead to further plugging or back up of material traveling through the drum.

Much like plugging, when sorting wet materials, trommel screens are prone to blinding. As wet feed materials, such as compost or solid waste, pass through the rotating drum, they can begin to clump and stick to the screen. This can cause further materials to build-up, leading to less efficient sorting if not halting production.

Even when blinding does not require immediate attention, it still requires cleaning of the trommel and can lead to additional maintenance. Cleaning of the drum and replacing trunion wheels and cleaning brushes can be costly.

Plugging, blinding, or simply regular use can cause damage to the trommels drum. While some minor damage is to be expected and can be prevented through proper usage and care, larger damage can be costly. One of the biggest disadvantages of the trommel screens design is the inability to replace part of the drum when damage occurs.

Aggregates Equipment, Inc. manufactures screening solutions which overcome the disadvantages of trommel screens. The BIVITEC Screen operates using a flip-flow principle and features a dual-vibratory process which prevents clogging and blinding.

The BIVITEC is an ideal screening solution for applications commonly using trommel screens, including sorting C&D waste, roofing shingles, compost, and more. Contact our sales team to request a BIVITEC for your operation.

how to build a motorized trommeland why on earth you would want to

how to build a motorized trommeland why on earth you would want to

Brian's the earth-biscuit type, with a flop of blond hair and a kayak rack on his Jeep that he actually uses. He's a community-garden aficionado and a yard farmer who could talk compost for hoursmostly because there's a massive heap of it in his backyard. Brian's compost pile is the Everest of our neighborhood. It is robust of scent and full of twigs, old pineapple rinds, his Australian shepherd's buried rawhide chews, and gigantic mounds of last year's oak leaves. And buried deep inside is some of the best compost Mother Earth has ever cooked.

A few years ago Brian built a manual compost sifter, just a big screen within a frame, and he shook small batches of compost through it, separating the fine material from whatever hadn't finished breaking down. He used the rich matter to top-dress his lawn, which improves moisture retention and soil structure, and to make his flower and veggie beds go nuts. He reduced the size of his compost mound and made room for the fall leaf drop in our neighborhood.

Then Brian unearthed an old rock bed left behind by a previous owner and thought about how great those rocks would look on the other side of the yardbut first the bed would need to be sifted and cleaned. The very thought of putting it all through his manual sifter nearly put him in traction. So he hit the Internet to find a better solution.

You know how it goes. You start a project, then halfway through Saturday you're surrounded by tools and a half-finished mess. Brian had watched hours of YouTube videos by guys who'd successfully built mechanical trommels before himguys like Paul Miller of La Mesa, California.

He watched as Paul framed a basic cylinder with bike rims and screening, then mounted it on a wooden frame with smaller wheels turning the sieve within the rims. Atop the structure he mounted a motor. The whole thing sat at an angle, so when Paul shoveled rough material into the higher end, the cylinder dropped fine material below and dumped chunky debris into a wheelbarrow or hopper.Brian got to work on the cylinder first:

1. Use three 24- to 26-inch bicycle rims for the cylinder frame. Brian grabbed his from the local bicycle collective. When I interviewed him, Paul said a friend who fixes bikes donated his. You get the idea.

He wasn't sure. Other projects filled his workshop. The trommel took a back seat. Eventually, Brian moved the cylinder into the backyard, where he felt bad about it for two years. The compost pile grew and grew.

Like I said, Brian's green-living credo is pretty infectious. I wanted to help him finish his trommel, so I figured I'd start at the heart of the problem: the motor. Lucky for us, our other neighbor, John, is a mechanical engineer for a major international manufacturer.

"The goal here is not to slow down the motor but to control a properly sized energy source," John says. The rotational speed of the trommel is critical for safety. About 20 or 25 rpm would be plenty. Plus, lowering the machine's speed would increase its torquethe twisting force that creates rotationallowing Brian to sift larger piles of compost.

A basic -hp electric motor spinning at 500 rpm is obviously too fast to couple directly to a trommel. Additionally, that same motor creates about 5 lb-ft of torque, which is not enough to do the job. To make the motor work, John says the easiest solution is to purchase a speed reducer. These affordable, mass-produced units are readily available from industrial distributors and many websites. Essentially a speed reducer is a gearbox.

"In addition to reducing the speed to a manageable level, it'll increase the torque," John says. "The neat thing about gears is that when you arrange them such that the output speed is reduced, the torque increases inversely." For example, if you connect a 500-rpm motor to a speed reducer, and the output speed is now 25 rpm, or 0 of the original speed, your torque now increases by a factor of 20.

"Industrial supply houses and motor distributors can help you put a nice little package together," he says. "Ask an electrician to make sure your circuit is wired correctly to withstand the load from the motor."

Instead of using a speed reducer, Paul, the YouTube guy, rigged up a machine using the trommel's center rim for speed control. "I used a 21-inch bike rim as a pulley wheel to step down the rpms of the motor," he says. Other trommel builders use a 1,750-rpm motor with a 2-inch pulley (A) going to a 10-inch pulley (B), then a 2-inch pulley (C) going to the 25-inch trommel frame (D).

1. The size of the frame will depend on the size of your cylinder and the position of the wheels you use to turn the cylinder within it. Brian planned to mount his trommel on caster wheels from the local Habitat for Humanity ReStore, but you could also use small wheels with an axle from a home store.

2. Frames are best made from 2 x 4 material with a plywood top that's sturdy enough to attach the motor to. (One YouTube builder made his motor mount adjustable for height because his pulley belts stretched out over time and he wanted to be able to tighten them.)

3. Screw the wheels directly to the frame to turn the cylinder. Paul Miller recommends just screwing the caster into the middle of a 2 x 4 and lining up the caster wheel with the middle of the bike rim, repeating on all four sides at each end. "There was no planning or measuring involved," says Miller. "I just basically built a square around the rims."

5. Here's where you can customize. Some of the YouTube builders added a piece of sheet metal as a guard on one side of the trommel so it doesn't fling dirt and debris all over the yard. Some builders crafted different drums for different purposessmaller screens for composting, larger screening for rock jobs. Others made the trommel contraption high enough that it could be directly positioned over raised garden beds to reduce the amount of shoveling required.

trommel screeners for sale | komplet

trommel screeners for sale | komplet

provides plants and machines for crushing and screening for recycling rubble and other construction material directly in site. We are leader in the world for the construction of treatment systems and waste recycling equipment.

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