The Kleemann impact crusher became an important piece of equipment for GreenRock Recycling as it expanded its product line to recycled demolition concrete and RAP.

GreenRock Recycling LLC of Clinton, New Jersey is a construction and demolition recycling company that serves residential, municipal and commercial customers across the state.

The company is a division of Brian Plushanski Construction Company, which started to provide standard and dyed mulch, topsoil, mason sand and sieving in 2012.

However, the company recognized the opportunity and invested in a Kleeman Mobirex MR 110 ZSi EVO2 impact crusher manufactured by the Wirtgen Group at the end of 2016 to help it process stones and aggregates.

The company stated that due to its investment, the company has been able to produce Recycled Concrete Aggregate (RCA) and Processed Recycled Asphalt Pavement (RAP) products certified by the New Jersey Department of Transportation, which has a strong market among contractors in Garden State . .

"Our Kleemann crusher makes a very beautiful, clean RCA that can be compacted well, looks like 1 1/2 inches minus dense grading aggregate, but the price is less than half," GreenRock Recycling Said Mike Plushanski, general manager of. "Moreover, our RAP is mainly used as a base material. It is also highly compressible and economical."

Plushanski explained that the crusher played a key role in helping the company evolve from its initial focus on wood processing.

"The recycling [operation] we allowed was originally wood-only for the part of the tree, including stumps, wood chips and logs," Plushanski said. "But now we receive bricks, blocks, and concrete, and we mix them into recycled concrete aggregates. We receive clean asphalt to make RAP. In addition to product sales, we also balance processing costs by charging tips."

In addition to recycling, GreenRock also has a small shale quarry on its Clinton property, which can be mined to produce certified clean fillers.

"We just want to lower our site to road level, so we have a good level of property. The use of shale is very similar to RAP, except that shale is used for more purposes because of the way RAP is used in New Jersey. Very strict. But as a certified clean filler, shale can be used anywhere," Plushanski explained.

GreenRock's Kleemann crusher replaced the 1,000-ton daily small jaw crusher, which was inherited from the existing construction business and was originally used by the company to crush incoming materials.

"[Our growth] is like crazy, that small shredder works 40 hours a week without reducing inventory," Pluhansky said. “The concrete came in so fast that the piles were growing while we were crushing. It also has no screening system, which is part of the problem; we can’t sell the material because flat “pancake” blocks larger than 2 inches will It fell from the chin. We were unable to meet the size specifications, and we were unable to obtain DOT certification for 1 1/2-inch materials, which is required by many contractors for large jobs. We need a higher capacity crusher, and we Need to meet DOT standards, so the Kleemann impact crusher is the best choice."

According to Plushanski, Kleemann's touch screen control system is an asset of the GreenRock machine sold on the MR 110 Z Si EVO2.

"Kleemann is much more advanced than the other machine we use," he said. "Through its remote control, I can adjust everything, including the distance between the curtain and the hammer, or open the return conveyor belt. If there is a problem, you can close and diagnose the problem and correct it faster. When using another machine, you You have to go to a computer screen that is difficult to navigate. With Kleemann, you only need to touch the part of the machine on the screen. This is user-friendly."

Another aspect that Plushanski likes the Kleeman crusher is how its diesel-electric drive system helps the company manage costs. "Our old jaw crusher burns 11 gallons an hour," Plushanski said. "We demonstrated that [another crusher] can produce more than 14 gallons per hour. Kleemann can burn 6.5 gallons of gasoline per hour and the engine has 500 horsepower. The fuel savings are huge."

The independent pre-screening function of the Mobirex hopper is also an advantage for GreenRock because the company keeps all the fine powder in its mixture. Plushanski says that allowing fine powder to bypass the crusher can extend the life of worn parts.

"The pre-screening [located in front of] the impactor is much more efficient than the simple [hole design] of another machine we have seen," he said. "Now, it is possible to adjust its speed and make sure that we throw away all the fine powder. We do not exceed one ounce of fine powder that should pass through the rotor. They fall directly onto the main conveyor belt and then onto the 1 1/2 inch sieve. On the system, instead of hitting our board hammer."

Alternatively, GreenRock processes RAP to a size under 1 1/4 inches, which is usually used as a base material for parking lots or driveways. Plushanski said that for RCA and RAP, fine powder is retained to make products similar to densely graded aggregates.

“We want a compactable substrate, and currently, we choose not to remove the fine powder from the side conveyor of the pre-screening machine,” he explained.

Plushanski said that due to its automation function, especially its automatic closing side gap setting adjustment, it becomes easier to start the crusher in the morning.

"You can perform zero point adjustment completely electronically," Plushanski said. "No matter what size curtain I set from the hammer, I know it is accurate. We no longer crush 40 hours a week like the old crusher. Instead, we only need to crush one or two days a week, so every Every few days, when [we start this day], I will check the bar and set a new zero."

Plushanski pointed out that most of the Klingmann machines are computer controlled, which is a benefit for GreenRock.

"Computer operations are a major point of purchase," he said. "The other crusher we demonstrated performed all the mechanical adjustments. When using Kleemann, when I started it one morning, I realized that I was still ready for RAP. When we left the concrete unused, I changed the curtains. Distance. I changed the pre-screening vibration and hopper speed. I was able to make all three adjustments through the touch screen on the machine, and for the other crusher, that meant having to shut down and climb up the machine with a wrench. I would have been there. Stayed for half an hour and tried to dial it."

"With Mobirex, I need 30 seconds to adjust the three parts of the machine, and I cannot adjust the three parts at the same time with another machine," he added. "You can't [use another machine] for pre-screening adjustments, and just hopper and blower adjustments will cost me half an hour with the machine turned off. With Kleemann, we can start operations without stopping."

Kleemann's diesel-electric drive system also helped the company save startup time, especially on cold days.

"You don't have to wait for the hydraulic system to warm up, which is great," Plushanski said. “It’s cold here for half a year. In the morning, we don’t have to wait 25 minutes for the hydraulic system to warm up. Using the old crusher, we will start it, run the conveyor belt, and then return to the office to finish the coffee while the coffee is heating up. When we demonstrate Kleeman crushing The machine time... it's 9 degrees outside, and it's up and running in 15 minutes."

The seamless installation and disassembly capabilities of the machine have saved the company another time. "It's easy to install and remove," Plushanski said. "The auxiliary screen system installed on the conveyor belt can be quickly disconnected. Within 15 to 20 minutes, I can discard it, replace all screens and reinstall them, and recycle different products."

Plushanski says the mobility of the machine also helps the company save time. Since GreenRock moves the impactors to different stocks when producing different products, the ability to quickly change screens and move from pile to pile is an important asset of the company.

In addition to saving time during the setup process, the design of the machine also allows GreenRock to reduce maintenance and maintenance time.

The aluminum shield around the crusher magnet prevents scrap steel and iron filings (such as from nails or wires) from clogging the equipment.

"Nothing accumulates because it can't stick to aluminum, but our old crusher stuck thousands of nails on its magnetized frame. It's hard to clean every day," Plushanski said.

Plushanski says that from a maintenance and cleaning point of view, the scraper on the belt is another advantage.

"These little things have an impact, such as the scraper on the top of each conveyor belt," he pointed out. "They don't need to adjust, they can remove all the material from the belt. Therefore, I don't have to clean the 2-foot-high dust under the machine every day.

In addition, the steel pan feeder located below the crusher intercepts the crushed material before the conveyor, absorbs the impact and protects the conveyor. This saves the company from having to replace belts.

"We used to pierce the belt, like our old jaw has no tomorrow," he said. "We spend $10,000 on belts every year, otherwise we won't have any problems. But these belts will never be affected by that kind of abrasiveness. The side rubber skirts keep the material trimmed and centered, preventing dust from entering the machine ."

In addition to Kleemann employees, Komatsu Northeast, a distributor of GreenRock, also provides product support, which makes it easier for the company to ensure uptime.

"When I have a question, I usually call... our Kleemann technical representative, who is always by my side," Plushanski said. "But our family has been dealing with our dealers for 30 years and they are great. If we need a site visit, they will arrive within two hours."

Whether it is the ability to market new products, improve work efficiency, or save money through more intuitive design, as GreenRock Recycling continues to develop its business, Kleeman products have always been a rock-solid investment.

This article was published in the May/June issue of Construction and Demolition Recycling. Matthew Graves is the director of marketing communications for Wirtgen America. His contact information is matt.graves@wirtgen-group.com.

The nearly US$2 million expansion project will increase the area of ​​the Pitkin County landfill by approximately 5 acres to accommodate large amounts of C&D waste.

According to the Aspen Times, the expansion of the Pitkin County Landfill in Aspen, Colorado is expected to begin later this month and will provide a "quick landfill" facility with a service life of approximately 6 years.

This nearly $2 million project will increase the landfill area by approximately 5 acres and increase its capacity by approximately 900,000 cubic yards. However, according to Cathy Hall, Pitkin County Solid Waste Supervisor, the current construction boom in Roaring Folklore Valley may soon eclipse the projected space for more than six years.

"As everyone moves here and demolishes houses, I have a feeling (lifespan) will be shortened," Hall said. "This will be an important year."

She said that construction and demolition waste, which accounts for most of the landfill sediments, has increased by 3% compared to 2019. Not included in these totals is the complete demolition of two local hotels-Molly Gibson Hotel and Aspen Hotel.

In addition to the debris associated with these demolition (which is expected to significantly increase the waste in the landfill), debris from the Sky Hotel (demolished in the summer of 2017) took up 3,030 cubic yards of the facility.

Hall told the Aspen Times that this does not include debris and contaminated tailings that would be thrown into the landfill from anything that happened from the bottom of elevator 1A.

According to Hall, state environmental health officials signed the northern expansion project for the landfill in February, and bidding for the project began shortly afterwards. Pitkin County budgeted $2.2 million for it, but a construction company from Rifle City, Colorado bid slightly more than $1.8 million for the project, and the final contract is pending.

Construction will start in mid-to-late June and will be completed in October or November.

With the start of the northern expansion project, landfill officials plan to turn their attention to designing a larger southern expansion project. Officials said that the second expansion—which will involve more engineering and construction than the current expansion—will expand the landfill capacity by 5.6 million cubic yards and extend the life of the facility by 30 to 40 years.

Pitkin County’s Construction and Demolition (C&D) regulations require developers to pay a deposit of $1,000 per ton of estimated waste. If the developer is able to transfer 25% of the waste to recycling or other reusable streams, the deposit will be refunded. However, according to the Aspen Times, many people choose to simply pay the price to complete the project faster.

The salvaged blades and transmission system components will be used as replacement parts for similar turbines.

Controlled Demolition Inc. (CDI) is located in Phoenix, Maryland, and recently demolished 90 Mitsubishi 1000A wind turbines in New Mexico.

CDI acted as the explosive design and performance subcontractor for the main blasting contractor Dallas Blasting Company. Dallas Demolition works for RiverCap Ventures in Rocky, Ohio, where the latter serves as the general demolition contractor.

According to CDI, no effort was made to protect the foundation or other wind farm infrastructure during its work. The staff of the company mobilized the 90 devices to the scene in two mobilizations. This allows wind farm owners to recover blades and drivetrain components from some turbines, which will be used as replacement parts for turbines in other wind farms.

CDI stated that the turbine has been safely dismantled and that this work from March to May was completed ahead of schedule.

Watch the implosion video below, provided by CDI:

Digital scale maintenance helps increase productivity and profits.

The solid waste environment presents unique challenges for those responsible for maintaining the functionality and profitability of truck scales. Due to heavy traffic and long operating hours for most solid waste facilities, it may be difficult to keep truck scales operating properly. In addition to being fully functional, truck scales must also prevent the loss of thousands of dollars due to inaccurate weighing.

Digital truck scales provide unique solutions for challenging recycling and solid waste environments, helping operations managers avoid the pitfalls of common electronic truck scale failures. Although the design is more robust and streamlined, truck scale owners must take some measures to protect their investment. Although solid waste and recycling truck scales must be calibrated and monitored by regulatory agencies, there are still some external factors and circumstances that may cause inaccurate weighing and loss of income.

Evaluating the following factors can help the operator formulate an action plan for potential problems related to the function of the truck scale.

The basis of scale is the most troublesome trap but the easiest to avoid. Providing a reliable foundation in a proper location is the first step in setting the location of a truck scale. Since the environment of recycling or solid waste sites can generate debris, always keep in mind that the truck scale design will prevent accumulation around load cells and wiring. Some digital truck scale designs place the load cell on the weighing platform to provide a safe haven from the rubbish and dirt accumulated near the base of the load cell bracket. If the load cell follows some digital design located near the ground, it will require frequent electrical cleaning due to the accumulation of debris. Understanding the ingress protection (IP) rating of the load cell and wiring is essential to prevent water and pressure damage to the load cell during cleaning, so please familiarize yourself with the IP rating system and understand the levels that the load cell can handle during cleaning.

2. Check hardware, load cell and wiring

Digital truck scales are designed to eliminate many problems related to the design of electronic scales, and scale owners can perform many checks to prevent downtime and damage. Because the junction box is eliminated in some designs and most of the wiring is reduced, only a few places may cause problems.

When securing to each individual load cell, check to make sure that the load cell connector fits tightly. The load cell connector should not show any signs of damage. The load cell cable should be checked for rodent damage or chewing marks. Any voids or areas that may be exposed to moisture or sediment may cause unreliable weighing or missing load cell readings.

Recycling and solid waste scales are exposed to strong acid conditions that can damage paint and surfaces. It is always good advice to regularly check the paint for rust and areas where the paint is corroded by corrosion. Truck scale manufacturers use heavy-duty paint and curing methods to prevent metal exposure, but truck scale owners must still work hard to protect their investment. Concrete deck truck scales can provide a good choice because they are largely immune to the corrosive elements that may damage steel deck truck scales; however, steel deck truck scales can be replaced and moved more easily, so Need to weigh. If the concrete is not formed correctly, it may crack and eventually damage the deck until it cannot be repaired. Therefore, the scale owner should also be vigilant and pay attention to signs of cracking.

The end user should also check the load cell cover. They fit snugly above the load cell pocket, so if the cover is not installed correctly, the possibility of moisture and debris entering the load cell increases.

Certain truck scale platforms completely eliminate traditional inspections, which simplifies problems related to damage to inspection equipment in truck scales. These designs also greatly improve the swing and movement that can damage the truck scale. For scales that use traditional calibration, check the check rod and rod for damage, and check whether the bumper bolts are cracked or broken. If any of these failures are observed, they should be corrected immediately to prevent permanent damage to the weighing platform. In addition to inspecting components for physical damage, scale owners must remain vigilant so that these systems are properly adjusted within the scale's manufacturer's specifications. Failure to do so may result in damage to the weighbridge and load cell, as well as costly downtime and repairs.

Always pay attention to the deck of the truck scale. A large number of overweight vehicles can damage the weighing platform and make it unusable. Please remember to clearly explain to the operator the weight limit and concentrated load capacity (CLC) of the truck scale working within the scale of the scale.

In addition to weighing instrument owners regularly checking their weighing instruments, a calibration or inspection plan should also be arranged with a trusted truck scale dealer. Truck scales used for recycling and solid waste may be subject to a lot of wear and tear and heavy use, so it is very important to develop a calibration plan with a qualified scale service company. Usually, an annual or biennial inspection plan is sufficient, but if the facility is used frequently, the frequency of calibration may need to be increased.

Digital truck scale models have huge advantages over analog truck scales because they can be remotely monitored by dealers who put the truck scale in use. Truck scale dealers can access a series of diagnostic information about these scales, and they will be able to correct the problem effectively and quickly. Information about the location of the scale, load cell configuration and specific load cell issues can all be obtained at the fingertips of a truck scale dealer using a digital load cell system. Some scales can even send warnings to remind truck scale dealers to pay attention to problems with items such as home run cables and load cell cables.

Truck scale dealers will provide test weights and test weight trucks to verify the truck scale and check whether the load cell is within the required tolerance range. NTEP regulations require the weight of scales used in legal trade applications to be within a certain tolerance range so that customers can get what they pay, and recyclers and solid waste owners can get the most benefit from their scale operations in a fair manner to both customers And scale owner. Truck scale dealers should also have current records of their test weights to prove that they are calibrated and accurate enough to test truck scales. The truck scale dealer will generate a record of the owner's scale complying with the weighing regulations, giving the operator peace of mind and providing official documents when needed.

Truck scales are designed to absorb and withstand the massive abuse of trucks entering and leaving the platform. Truck scales with traditional inspection functions are designed to move with traffic flow. The new truck scale that eliminated the old inspection system was designed to move slightly due to initial movement and then stabilize to a stable position. If the scale and its inspection system are not subject to the extra pressure of the truck's rapid entry and exit, the life cycle of both systems will be longer. Clearly marking entrances and exits with extremely low speed limits will reduce damage and extend the service life of the truck scale, so that recycling and solid waste owners do not have to invest in replacement truck scales prematurely. Not only does the guide rail have advantages as a safety tool, it also reminds the driver that there is a scale ahead, prepares them to slow down and helps align their vehicle with the side line of the weighbridge. The card reader and gate control are also a good supplement to manage and control the flow to extend the life of the scale.

Compared with the old-style weighbridge technology, modern digital truck scales have huge advantages. The ability to remotely monitor, eliminate cumbersome inspection components, and the protection of load cells helps prevent most expensive repairs and downtime, which can burden recycling centers or solid waste locations. Diagnosis is much faster, and digital truck scales continue to provide end users with a huge return on investment. Truck scale owners must also follow the above tips to play an active role in protecting their investment. Applying these steps will make the digital scale run longer and more consistent, thereby protecting profits and productivity in the process.

Caleb Tidball is the marketing coordinator for Cardinal Scale Manufacturing Co.

Panelists said that the new demand from China will increase supply pressure on the already tight global market.

By 2021, Chinese steelmakers have not yet flooded the global scrap iron market, but panelists at the online meeting of the World Scrap Metal Recycling Division of the Bureau of International Recycling (BIR) stated that preliminary tests indicate that scrap is passing inspection and customs procedures.

Lim Kok Jiak (LKJ) is a senior bulk trader of China Zhejiang Metal Materials Co., Ltd. in Singapore. He said that he and other buyers who ship to China mainly buy materials from Japan and Korea because these markets are close to these markets and are familiar with Companies doing business in these two countries.

Because Japanese and Korean steelmakers (also engaged in the scrap trade) often have offices in China, buyers in that country "are very safe to buy from them," Lim said. Since the Chinese government has set its own new scrap steel standard, the rest of the world is not familiar with it. “We want to cooperate with big companies,” Lin said, so if there is a problem, “we know who to look for.”

Lim said that Chinese buyers are basically satisfied that higher-grade black scrap can now enter China, although he also described buyers there as price-sensitive. If they can purchase enough domestic scrap in China, they are willing to stay away from the world. The market-even if it is of lower quality.

Lim said that purchasing from China may be more active in the future. "Looking forward, China is encouraging this kind of carbon neutrality," he commented. In addition to adding more electric arc furnace (EAF) capacity, even operators of basic oxygen furnace (BOF) plants and blast furnaces are also looking for ways to increase scrap steel usage. "I think this will definitely push up global scrap prices," he commented.

Chinese steel mills are likely to come into contact with shippers from the United States and Europe, which imported about 26 million tons of ferrous metal scrap as early as 2009. When they returned to the market with the new standards implemented by the government, Lim suggested that sellers first "try plate and structure [P&S} and shredded paper" grades, because "these two materials have been cleared in some ports."

Initially, the Chinese government hoped that the chemical report generated by the laboratory could be provided with the scrap shipment, but "now exporters can make this certificate themselves," Lim said. He said that if shippers were to arrive at a converter steel plant hungry for new waste in northern China, they might consider shipping to Tianjin or Qingdao ports, adding that Tianjin port and customs officials may be more familiar with waste.

According to Lee Allen, a senior price reporter at Fastmarkets, if China starts to import 5-10 million tons of ferrous metal scrap each year, it will have a significant impact. Part of the reason is that buyers in several other Asian countries (including Bangladesh, Taiwan and Vietnam) have put pressure on global supply.

In his June 1st speech in the ferrous metals department, Allen described that ferrous scrap prices had doubled from early 2020 to mid-2021, but pointed out that some steel prices have tripled or quadrupled, creating a considerable amount of steel. Industry profit margins. Team member Tom Knippel of SA Recycling in the United States and Greg Schnitzer, who works for Sims Metal Global Trade Corp in California, also noticed this situation.

Knippel calls this the “decoupling” of scrap prices from finished steel prices, adding that the prices of certain types of steel are based on the forward demand of the “still vacant supply chain”.

Two American traders and Denis Reuter, chief operating officer of German-based TSR Recycling, described the black scrap market as a market that has been in short supply in 2021. "In Europe, due to problems in the automotive industry, we encountered huge problems with new products," Reuter said. "The amount of high-quality waste generated is really very, very low, but the demand is still high," he added.

Knippel stated that the hard-to-find price premium for immediate scrap has caused steel mill buyers to carefully calculate their lowest-cost suitable charging equation and switch to purchasing additional scrap. In terms of timely ratings, he stated that as long as COVID-19 affects activities in parts of the world, it is likely to “continue to curb overall waste generation”.