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AirSweep Gives Instant Flow, 25% Time Savings

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AirSweep was the only flow aid that met their specifications, solved the problem and saved energy, too

W. L. Gore & Associates, a global material science company that specializes in films and membranes, was testing a new material for a special fabric used by the military and firefighters for chemical protection. However, material blocks were stalling production and product development.

Problem

They were working with polytetrafluoroethylene (PTFE), a high-performance plastic that can withstand high temperatures and repel water.

However, the material would bridge and pack in the vacuum receivers. Workers had to manually clear the material blocks with rods or hit the vessel with mallets. This would happen five or six times for each run, taking 15 to 20 minutes.

That would add up to an hour of downtime for every four- to five-hour run. “It’s pretty significant when you’re trying to move material at any reasonable rate,” said Zachary Corcoran, the Equipment Process Engineer. “We needed an automated system that didn’t require constant checking because we have other aspects of the process to monitor and we don’t have time.”

However, choosing the right flow aid was also challenging. Some blocked areas were inaccessible. The vessels they used were small and had thin walls, so vibrators or agitators that caused metal fatigue were out of the question. Some pneumatic flow aids like air pads would compromise their vacuum system.

Solution

Zachary read about AirSweep in Powder & Bulk Solids. “I had a direct call with the sales team, and expressed my concerns on vessel size and running a flow aid in a system that is usually under a vacuum when pulling the material.”

The AirSweep engineers recommended the AirSweep VA-06. It was just the right size for their material and vessel and could reach inaccessible areas.

And unlike other pneumatic flow aids, the AirSweep nozzle also released very short, controlled air pulses. It was safe to use in a vacuum system, and more energy efficient.

Installation was simple and seamless. “It was quick to get here, and all the resources were provided to us like the installation guide and even the air tank. That was pretty helpful since we didn’t have to search for outside vendors to get all the necessary
pieces.”

Installation, including welding and connecting it to the air system, only took four hours.

Results

Immediately after the first trial run, W. L. Gore & Associates ordered two more AirSweep systems for their other plants.

“AirSweep saved us one hour of downtime for every four-hour run – or 25% time savings,” said Zachary. “Instead of babying the process, we can focus on production and doing our jobs”

AirSweep is also helping them save on costs. “Air efficiency is also a big piece of it for us. Our vessels are so small, so we have pretty significant savings on compressed air by just having short pulses rather than an air pad that is constantly running.”

As for recommending AirSweep to other manufacturers, Zachary has this to say: “We’re going to be ordering another full system for another plant overseas, so I think that speaks for itself.”

AirSweep Exceeds Expectations – “You Should Be On Billboards Everywhere”

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A mining company struck gold with AirSweep’s performance, safety, and service

First Quantum Minerals Ltd., one of the fastest-growing mining companies in Africa, needed a reliable way to move copper concentrate through the chutes. However, other flow aids damaged the vessels or created safety hazards.

Problem

The material – a solid mixture with a fine particle size of 18% to 24% copper, sulfur, and silica – clogged the chutes while being transferred from storage bins to the furnace.

Vibrators didn’t work and damaged the vessel walls. Workers still spent up to two hours each day clearing the chutes by hosing them with compressed air or hammering the walls. When copper supplies ran low, they also had to close down the furnace to wait for the chutes to be re-activated.

“This was not a sustainable practice. We were losing time and compressed air that could be used elsewhere,” said Emmanuel Mudenda, a Metallurgist for Kansanshi Copper Smelter.

Solution

The material they used was very dense and heavy, and could not be activated with fluidizers or other light flow aids. However, air cannons were too loud and dispersed material in explosive bursts. This was a safety issue – and First Quantum was known for being one of the safest in Africa.

They emailed AirSweep and were pleasantly surprised to get a response immediately. They were able to install the system without any problems and got instant results.

Results

With AirSweep in place, the mining company had no issues with material blocks in the chutes. Workers can focus on other aspects of production, and they don’t have to worry about vessel damage or noise from vibrators or hammers. “AirSweep is quiet and effective,” said Emmanuel.

“The performance has been so good that we would like to install the same device on a few other chutes. Customer service is also top-notch,” he added. “ You guys should be on billboards everywhere.”

AirSweep: Prescription for Poor Material Flow

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A PHARMACEUTICAL COMPANY SOLVES THEIR BIGGEST HEADACHE WITH AIRSWEEP

Material flow can be a headache—especially for pharmaceuticals. To manufacture tablets, powder ingredients are mixed in a blender and then discharged into a bin or a hopper, from where they are fed to the tablet press. Unfortunately, many fine powders are prone to bridging, arching, and segregation. This was the problem that plagued a global, multi-billion pharmaceutical company, and AirSweep proved to be the perfect prescription.

Problem

During the production of acetaminophen, an over-the-counter drug, multiple powder ingredients would bridge in the hoppers. This not only slowed down production, but if the arch or bridge suddenly breaks, the overflooding can affect downstream processes, and be hard to clean up.

Erratic flow also compromises product consistency and quality. This can lead to the rejection of batches worth hundreds of thousands of dollars and poses a risk to the pharmaceutical’s reputation and the safety of its products.

Solution

The company asked the AirSweep team to do a material flow test and found that the powders responded very well to the AirSweep system. Installation took less than 48 hours.

Result

With the AirSweep in place, the pharmaceutical company was able to achieve on-demand, reliable material flow in their acetaminophen production.

“With acetaminophen being for human consumption, we cannot have non-uniform batches due to inconsistent material flow. It was costing us thousands to discard those batches. After installing AirSweep, it was a success and we immediately added AirSweep to another one of our process lines” – Project Director, Corporate Engineering.

Dazic Prevents a Dangerous Dust

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Global tire manufacturer installs DAZIC to meet plant safety standards

Carbon black is used in the production of rubber tires to improve durability and performance. However, OSHA classifies it as a combustible dust, and requires companies to prevent it from accumulating.

One of the world’s largest tire manufacturers uses DAZIC® zero speed switches to meet plant safety standards.

AIRSWEEP PREVENTS A DANGEROUS DUST

Problem

If equipment malfunctions and causes a carbon black spill, it creates a dangerous plant environment. Finely dispersed particles can form explosive mixtures in the air and cause flash fires. It also causes coughing, breathing problems, and skin or eye irritations.

Since carbon black doesn’t dissolve in water and solvents, clean-up is long and difficult. This prolongs worker exposure, and stalls production for days.

Solution

The tire manufacturer installed DAZIC zero speed switches to signal the operator if equipment stops or runs too fast—preventing material flooding and spills.

Results

With DAZIC in place, there have been no incidents of material pile-up. It was a reliable and affordable solution—and thanks to the DAZIC customer service, was very simple to implement. “They have been very responsive to the process needs of our factory.”

AirSweep: Full Speed Ahead

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AirSweep® helped a tire manufacturer achieve faster flow at lower energy cost

One of the world’s largest tire manufacturers had hit a roadblock in production, because of the poor flow characteristics of one of its most important materials.

Carbon black is used in the production of rubber tires to improve durability and performance. It conducts heat away from the tread and belt area, and can reduce rolling resistance.

However, carbon black is a very challenging material to handle. It cakes and packs easily, and leaves deposits on every surface it touches.

AirSweep: Full Speed Ahead

Problem

The manufacturer faced two problems that were costing them time and money.

First, carbon black bridged above the discharge. This stalled the weighed batch of material and caused frequent process delays.

Second, it coated the interior of the vessel and compromised batch uniformity. Several batches that proved off-spec during quality testing had to be thrown out.

The manufacturer initially tried fluidizers, but these were ineffective and expensive to operate. They wanted a flow aid that created on-demand flow, but used plant air and energy more efficiently.

Solution

AirSweep proved to be the most reliable, cost-effective solution for a problematic material like carbon black.

Two AirSweep VA-12 units were installed on the weigh hopper. This size is ideal for medium to large vessels when it’s important to limit the volume of air introduced into the system—either to avoid over-aeration of the product, or when plant air is limited or costly.

The AirSweep system could be set up to release pulses in a specific time and sequence. It used less compressed gas than fluidizers, which would run continuously. The pulses could also be positioned at problem spots to prevent bridging and flush away residue.

Results

The AirSweep system ensured smooth, continuous flow of the carbon black material. The plant achieved higher production and batch uniformity, and saved a lot of money because of lower energy consumption and product waste.

Because of AirSweep’s proven success, the tire manufacturer has installed additional units in other parts of the plant. The system is now being used in several of their facilities in the United States and Canada.

“The fluidizers were really ineffective,” said the manufacturer’s engineering technology specialist. “Airsweep has provided us with reliable flow and reliable batch uniformity.”

The manufacturer has also been very happy with the service of the Control Concepts team. “They have been very responsive to the process needs of our factory.”

AirSweep Proves to be the King of Carbon Black Material

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Vibrators couldn’t handle carbon black, but AirSweep achieves on-demand flow in less than a week

A global manufacturer of carbon black additives supplies over 2 million tons to leading companies in the paint, plastic, tire, rubber, and ink industries every year.

AirSweep Proves to be the King of Carbon Black Material

Problem

Carbon black’s flow properties make it particularly difficult to handle. It has a tendency to fluidize, and form deposits along the conveyor lines and storage vessels. Since it does not dissolve in water and solvents, cleaning can be time-consuming and expensive.

Carbon black also has a tendency to cake and pack while unloading, and bridge or rathole in the hoppers. For this manufacturer, bridging over the silo discharge would cause long and frequent process delays. The entire process would shut down because the rest of the machines were starved of raw materials.

Solution

After finding out that vibrators were ineffective, the manufacturer switched to AirSweep—and saw immediate results.

Three AirSweep VA-51 units were installed on a weigh hopper. The air pulses easily activated the material for reliable, on-demand flow.

And it was quick – installation took less than 48 hours.

Results

AirSweep has proven to be so reliable, that the company had the AirSweep system retrofitted to several other process hoppers at the facility.

“I’m extremely happy at the responsiveness of Control Concepts and the local distributor they brought in to work with us,” said the lead process engineer. “Their helpfulness got our project off the ground in less than a week.”

AirSweep Improves Cyclone Efficiency

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AirSweep® can be installed in cyclones to prevent material build-up and frequent cleanouts

A plastic and chemical manufacturer had frequent production delays because of the build-up of adipic acid in their cyclone.

AirSweep® can be installed in cyclones to prevent material build-up and frequent cleanouts

Problem

Adipic acid’s flow properties and moisture content caused frequent shutdowns and cleanouts. It would coat the upper discharge area, forming a cake-like crust. Bridging over the discharge would lead to complete blockage. The product-laden air would also fail to drop out, and return to the baghouse. As a result, good product would get carried to the waste stream.

Solution

AirSweep is used in many processes that use adipic acid, and our experience allows us to give fast and precise solutions.

AirSweep engineers assessed the vessel and positioned six AirSweep VA-06 units in critical areas of the cyclone.

Results

The AirSweep prevented bridging and cleaned critical interior surfaces, resulting in more efficient operations and fewer operator interactions. “The AirSweep was a success! We are already looking at retrofitting more units into a silo with the same material.”

AirSweep Saves R.M Palmer From a Sticky Situation

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R.M. Palmer, a candy manufacturer in Reading, Pennsylvania, produces specialty holiday confections for US and international distribution. Some creations include novelties such as chocolate pumpkins, Easter bunnies, and Santas. The privately-owned company has been making confections for 50 years.

To make chocolate, cocoa powder is poured from 50-pound bags into a bag dump station with an integral dust collector. The powder is gravity-fed to a large storage hopper. From there, it moves to a smaller intermediate hopper that discharges into a rotary airlock, then is pneumatically conveyed to a weigh batching area.

RM Palmer (Cocoa) Infographic

Problem

Their cocoa powder is very fine and has a 12% oil content. It would pack, bridge and rathole in the intermediate hopper. Workers had to do manual cleaning every 3 or 4 days.

“It wasn’t a pretty sight,” said coatings manager Bob Wieland. After striking the hopper with a large mallet to loosen the powder, operators would open an access door.

“We had to reach through the door and scrape down the hopper walls with a plastic scraper,” Wieland said. “If you weren’t careful as you reached the door, the powder could fall on you and turn you into a giant cocoa puff! We had some pretty big spills in the past.”

Solution

Wieland saw an advertisement for a bin discharge system that injects air pulses between the material and vessel wall to lift and sweep material off slopping surfaces. Wieland was wary of all bin discharge system claims by then, but he liked AirSweep’s trial period and guarantee.

“A lot of manufacturers say their product will work but they don’t back it up,” Wieland said. “I told the rep that I’d used three other units with no luck, and he guaranteed the system would work or I wouldn’t have to pay for it. Their trial period allowed 30 days to install the bin discharger and 30 more to use it. I couldn’t go wrong.”

Two AirSweep VA-06 food-grade units were installed 180 degrees apart, 1.5 feet above the hopper outlet. Special couplings mounted the units to the hopper’s curved surface. A CB04-4 programmable sequence timer with NEMA 4 enclosure triggered alternating ¼-second air pulses every 20 seconds.

This solved the mounting problem and all 24 VA-06 units were attached. Holes were drilled into the refractory, then mounted with rings on top of the incoming duct.

Results

The plant went from downtime every 3 or 4 days to “no breakdowns, replacements, or any problems whatsoever.” They were even able to add two production shifts per month, increasing output.

“AirSweep works,” Wieland said. “It has a stronger air pulse than the bin aerators or fluidizers we previously installed. The air moves the powder down in a very large column so powder doesn’t stick to the walls.”

AirSweep was also more convenient and cost-efficient than other flowaids. “It’s very quiet; you hardly hear it run. The sequence times saves plant air. The system installed very easily and is built very simply.”

AirSweep runs three shifts per day, 7 days per week. Through increasing productivity and lower energy and maintenance costs, they were able to recover the system’s cost after just two months of operation.

Airsweep System Keeps Lithium Carbonate Flowing In The Desert Of Northern Chile

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In Chile, Albemarle Ltd. is the second leading converter of lithium brine into lithium chloride and lithium carbonate. The production process begins with the treatment of natural brine that is obtained by pumping from the core of the Salar de Atacama and is available in open air pools, which are subjected to the intense solar energy of the Atacama Desert.

The natural brine used by Albemarle for its process contains a lithium concentration close to 0.2%. Due to evaporation produced by the sun, the brine becomes more concentrated and moves between different pools until reaching a 6% lithium content.

The concentrated brine is transported in tank trucks to the La Negra Chemical Plant in Antofagasta. Here, the brine extracted from the Salar de Atacama is subjected to a series of purification and chemical processes to produce products such as Lithium Carbonate-Battery Grade which is used in electronic devices, electric cars, and safety equipment, among others.

Airsweep Deicing Infographic

Problem

Poor flowability of processed lithium carbonate through drop chutes and a discharge pipe was an ongoing problem for the Albemarle La Negra Plant due to the product’s high moisture content. While maintaining a powder/talc consistency, the moisture content of lithium carbonate is 10-25%, with a density of 35-100 lbs/ft3 (561-1601 kg/m3).

Lithium Brine Beds – Salar de Atacama Region in Chile Hammers were being used to loosen processed materials that were stuck in the drop chutes. The chutes measure 10″ (25.4 cm) in diameter with stainless steel walls lined with PTFE (Teflon). From the drop chute/discharge pipe system, bins were filled using a screw feeder, which discharged to various silos.

Solution

Initially, twenty-four (24) Model VA-06 stainless steel AirSweep units were proposed for this project. Upon closer scrutiny, the typical welding and bolting installation methods of the VA-06 standard mounting coupling could not be used due to the PTFE-coated interior walls of the drop chute. Control Concepts recommended the AirSweep Outside-In Mounting Coupling, which allows AirSweep units to be attached to vessels without welding or bolting.

This solved the mounting problem and all 24 VA-06 units were attached. Holes were drilled into the refractory, then mounted with rings on top of the incoming duct.

Results

Michelle Williams, Senior Project Manager of the Albemarle La Negra plant, reported their material filling time goal of 1.65 metric tons per hour was achieved due to the AirSweep system eliminating the material plugging and poor flow.

Additionally, the operators could finally “Drop The Hammers!” After successful initial trials, two more projects have been purchased and installed, with new applications being considered.

Cleared For Take Off

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An aviation services company gets perfect material flow—and first-class customer service

The Federal Aviation Administration (FAA) requires airlines and airports that operate during icy conditions to perform deicing and anti-icing of aircraft and airfield pavement. Frozen deposits can lead to loss of control, engine flameout, and other accidents. An aviation services company that helps to deice gates, ramps, and other critical equipment for over a hundred airports across the United States had to clear their material blocks, before they could clear the runway.

Airsweep Deicing Infographic

Problem

The company blended salt with binder and other additives to make pellets, which were irregularly shaped to prevent them from rolling or blowing off the runways. Unfortunately, many materials used in deicing formulas are hygroscopic, and have a tendency to clump and harden.

The company’s process engineer suggested vibrators. But after the maintenance supervisor saw its description of “gentle vibration,” he knew it wouldn’t work.

“We needed something more…violent,” said the company’s CEO.

Solution

The aviation services company searched online and upon watching the video of the AirSweep® material flow aid system, knew it was exactly what they were looking for. AirSweep® engineers customized a solution that took into account their process, size, and angle of the vessels. This included:

  • Two PM surge welded bins: Two VA-06 units placed at the upper half of the vessel, two VA-06 units in the center, and one VA-06 unit above the discharge
  • Four minor welded bins: Four VA-06 units placed 90 degrees apart above the discharge
  • Acetone bins: Four VA-06 units placed 90 degrees apart
  • Receiving bins: Four VA-06 units placed 90 degrees apart
  • Baghouse: Four VA-12 units placed 90 degrees apart
  • Cyclone: Four VA-06 units placed 180 degrees apart

Results

“AirSweep has made a 100% difference to our materials flowing,” the aviation services CEO said. They are getting more units to install in their other business areas, where they serve other airlines—including the biggest carriers and package delivery services.

They’re also happy with the “first-class” customer service they’ve received. “From the very beginning, the Control Concepts team has been very responsive. Every quote is accurate, and I never have to ask ‘where is my stuff’? Because if I’m calling a company for an update, I’m already mad,” said the CEO.

“Finally, we’ve found a company on the same level of service as us. With Control Concepts and AirSweep, there’s no headaches or bad surprises.”