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Tips for effective screen media maintenance – Canadian Mining Journal

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E: Prolonged screen life starts with proper installation. Consider looking into screen media installation and maintenance training seminars Credit: MAJOR

It doesn’t matter how much material is produced in a day if it is contaminated or not sized correctly. Though screen media is a minor cost when compared to larger equipment in a mine or quarry, it is a crucial part of any operation’s profit machine. One unexpected break and thousands of dollars can be lost in terms of downtime and repairs.

For that reason, mines need to put a large focus on proper screen media maintenance, including selection, installation, preventative maintenance and storage. Best practices result in fewer changeouts, less unplanned downtime, higher quality product and a more efficient operation.

Where it used to be as simple as choosing the right size of woven wire for their material, operations now face a choice of dozens of different styles and brands of screen media. And while it may be tempting to think a cheap, off-the-shelf option will get the job done, managers should take a moment to think about what the wrong choice could mean. Not choosing a screen media suitable for an individual application could mean unexpected breaks, ruined piles from contamination, and overall expensive downtime.

Work with a screen media manufacturer to figure out what media is the best fit for each area of the screen deck. In some cases, a heavy-duty option may be necessary to take the punch at the feed end, followed by something durable but with more open area.

However, in many applications, high-vibration wire screens are suitable for the entire deck. An operation could choose higher gauge or double wire screens for high tonnages at the feed end and increase open area for the rest of the deck to boost stratification. Sometimes referred to as self-cleaning screen media, this media can be especially beneficial in an application with a lot of fines and clay deposits or where an operation has had difficulty with contaminated piles caused by too much organic material. The high-vibration qualities also tend to go far in solving issues with blinding and pegging.

Don’t slack on installation

It’s not uncommon for an operation to send the newest crewmember to complete the undesirable job of screen media change-outs, but the task benefits from someone with a bit more experience. The best screen media in the world won’t do any good if it’s installed incorrectly. This could mean improper tensioning or even installing it the wrong way around, something that happens more often than it should. The resulting issues can include accelerated wear, panels broken too soon and inefficient screening.

While specifics vary depending on the type of media, there are a few overall best practices for screen media installation. To start, clean and check the condition of components that touch the screen, make sure that the screen panel matches what was ordered, and install the screen based on instructions from the manufacturer for that particular type. During installation, make sure each support bar touches the screen and that the tension matches manufacturer recommendations. Some manufacturers include a “do’s and don’ts” sheet with screen media to make the process easier. Also, crews should make sure they are following safety procedures, including having more than one person working on the installation and using the lock out procedure to prevent the equipment from being turned on while personnel are working on it. Certain types of screen media are safer to install than others, including shrouds of metal to cover the sharp hooks, no sharp edges and a lighter weight than standard woven wire.

Consider looking into screen media installation and maintenance training seminars to prolong screen life. Manufacturers often offer the service either through site visits or via a nearby dealer. The benefit will be a crew with shared knowledge of proper installation that could be worth thousands in unexpected downtime prevention.

Keep your eye on the screen

Once installed correctly, it’s still best to check screen media at least weekly to make sure tensioning is proper and the panels aren’t showing unusual signs of wear. A little bit of extra time during routine preventative maintenance can have a noticeably positive effect on profits.

While checking tension, also look at the clamp bars themselves. Check for wear, corrosion or cracks and examine the rail for straightness, which is necessary for even tension. Examine all nuts and bolts and replace any that are worn, stripped or corroded. Shaker bolt threads with excess build-up can be cleaned by running them across a wire wheel. Also, replace clamp bars that are thin or caving in to greatly improve screen media wear life and be sure to choose OEM versions for proper operation.

Screen box diagnostics systems can help prolong media life and improve screening by checking and monitoring a machine’s health. Use a vibration analysis system to inspect the machine for balance and excessive vibration, which can lead to screen media failure or unintended machine wear. Vibration analysis systems are becoming easier to use. Some of the newest include only a single sensor, no wires and work quickly with a smartphone.

When it’s time to remove and replace the screen media, pull off the bar rail or crown liners and inspect the steel bar rails for wear or warping. Best practice is to replace the bar rail liners during each change-out for longer screen media life.

Storage matters

Just like it’s best to keep the expensive new car out of the harsh elements to lengthen its lifespan, so too should screen media be kept out of harm’s way to maximize its effectiveness. Leaving the media in a pile near the screen box structure is convenient, but can lead to wires rusting, something that can reduce durability. Another common issue is screen media on the ground simply being run over by heavy equipment. Wire screens also get damaged when stored standing upright. The best solution to prevent damage during storage is a simple rack that allows crews to hang the screens from the hooks. This prevents damage and improves accessibility by allowing personnel to find the right screen without sifting through a pile of panels. Also, keep extra panels covered and in a well-marked area out of the path of heavy equipment.

Though minor compared to the rest of a mine site, operations benefit from staying proactive with screen media maintenance. From choosing the right media for the job and installing it correctly, to proper storage and preventative maintenance, treating screen panels right can mean less downtime, fewer headaches and more profits.

Lars Bräunling is MAJOR’s director of product technology (www.majorflexmat.com).

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What to stream this weekend: ‘Civil War,’ Snow Patrol, ‘How to Die Alone,’ ‘Tulsa King’ and ‘Uglies’

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Hallmark launching a streaming service with two new original series, and Bill Skarsgård out for revenge in “Boy Kills World” are some of the new television, films, music and games headed to a device near you.

Also among the streaming offerings worth your time as selected by The Associated Press’ entertainment journalists: Alex Garland’s “Civil War” starring Kirsten Dunst, Natasha Rothwell’s heartfelt comedy for Hulu called “How to Die Alone” and Sylvester Stallone’s second season of “Tulsa King” debuts.

NEW MOVIES TO STREAM SEPT. 9-15

Alex Garland’s “Civil War” is finally making its debut on MAX on Friday. The film stars Kirsten Dunst as a veteran photojournalist covering a violent war that’s divided America; She reluctantly allows an aspiring photographer, played by Cailee Spaeny, to tag along as she, an editor (Stephen McKinley Henderson) and a reporter (Wagner Moura) make the dangerous journey to Washington, D.C., to interview the president (Nick Offerman), a blustery, rising despot who has given himself a third term, taken to attacking his citizens and shut himself off from the press. In my review, I called it a bellowing and haunting experience; Smart and thought-provoking with great performances. It’s well worth a watch.

— Joey King stars in Netflix’s adaptation of Scott Westerfeld’s “Uglies,” about a future society in which everyone is required to have beautifying cosmetic surgery at age 16. Streaming on Friday, McG directed the film, in which King’s character inadvertently finds herself in the midst of an uprising against the status quo. “Outer Banks” star Chase Stokes plays King’s best friend.

— Bill Skarsgård is out for revenge against the woman (Famke Janssen) who killed his family in “Boy Kills World,” coming to Hulu on Friday. Moritz Mohr directed the ultra-violent film, of which Variety critic Owen Gleiberman wrote: “It’s a depraved vision, yet I got caught up in its kick-ass revenge-horror pizzazz, its disreputable commitment to what it was doing.”

AP Film Writer Lindsey Bahr

NEW MUSIC TO STREAM SEPT. 9-15

— The year was 2006. Snow Patrol, the Northern Irish-Scottish alternative rock band, released an album, “Eyes Open,” producing the biggest hit of their career: “Chasing Cars.” A lot has happened in the time since — three, soon to be four quality full-length albums, to be exact. On Friday, the band will release “The Forest Is the Path,” their first new album in seven years. Anthemic pop-rock is the name of the game across songs of love and loss, like “All,”“The Beginning” and “This Is the Sound Of Your Voice.”

— For fans of raucous guitar music, Jordan Peele’s 2022 sci-fi thriller, “NOPE,” provided a surprising, if tiny, thrill. One of the leads, Emerald “Em” Haywood portrayed by Keke Palmer, rocks a Jesus Lizard shirt. (Also featured through the film: Rage Against the Machine, Wipers, Mr Bungle, Butthole Surfers and Earth band shirts.) The Austin noise rock band are a less than obvious pick, having been signed to the legendary Touch and Go Records and having stopped releasing new albums in 1998. That changes on Friday the 13th, when “Rack” arrives. And for those curious: The Jesus Lizard’s intensity never went away.

AP Music Writer Maria Sherman

NEW SHOWS TO STREAM SEPT. 9-15

— Hallmark launched a streaming service called Hallmark+ on Tuesday with two new original series, the scripted drama “The Chicken Sisters” and unscripted series “Celebrations with Lacey Chabert.” If you’re a Hallmark holiday movies fan, you know Chabert. She’s starred in more than 30 of their films and many are holiday themed. Off camera, Chabert has a passion for throwing parties and entertaining. In “Celebrations,” deserving people are surprised with a bash in their honor — planned with Chabert’s help. “The Chicken Sisters” stars Schuyler Fisk, Wendie Malick and Lea Thompson in a show about employees at rival chicken restaurants in a small town. The eight-episode series is based on a novel of the same name.

Natasha Rothwell of “Insecure” and “The White Lotus” fame created and stars in a new heartfelt comedy for Hulu called “How to Die Alone.” She plays Mel, a broke, go-along-to-get-along, single, airport employee who, after a near-death experience, makes the conscious decision to take risks and pursue her dreams. Rothwell has been working on the series for the past eight years and described it to The AP as “the most vulnerable piece of art I’ve ever put into the world.” Like Mel, Rothwell had to learn to bet on herself to make the show she wanted to make. “In the Venn diagram of me and Mel, there’s significant overlap,” said Rothwell. It premieres Friday on Hulu.

— Shailene Woodley, DeWanda Wise and Betty Gilpin star in a new drama for Starz called “Three Women,” about entrepreneur Sloane, homemaker Lina and student Maggie who are each stepping into their power and making life-changing decisions. They’re interviewed by a writer named Gia (Woodley.) The series is based on a 2019 best-selling book of the same name by Lisa Taddeo. “Three Women” premieres Friday on Starz.

— Sylvester Stallone’s second season of “Tulsa King” debuts Sunday on Paramount+. Stallone plays Dwight Manfredi, a mafia boss who was recently released from prison after serving 25 years. He’s sent to Tulsa to set up a new crime syndicate. The series is created by Taylor Sheridan of “Yellowstone” fame.

Alicia Rancilio

NEW VIDEO GAMES TO PLAY

— One thing about the title of Focus Entertainment’s Warhammer 40,000: Space Marine 2 — you know exactly what you’re in for. You are Demetrian Titus, a genetically enhanced brute sent into battle against the Tyranids, an insectoid species with an insatiable craving for human flesh. You have a rocket-powered suit of armor and an arsenal of ridiculous weapons like the “Chainsword,” the “Thunderhammer” and the “Melta Rifle,” so what could go wrong? Besides the squishy single-player mode, there are cooperative missions and six-vs.-six free-for-alls. You can suit up now on PlayStation 5, Xbox X/S or PC.

— Likewise, Wild Bastards isn’t exactly the kind of title that’s going to attract fans of, say, Animal Crossing. It’s another sci-fi shooter, but the protagonists are a gang of 13 varmints — aliens and androids included — who are on the run from the law. Each outlaw has a distinctive set of weapons and special powers: Sarge, for example, is a robot with horse genes, while Billy the Squid is … well, you get the idea. Australian studio Blue Manchu developed the 2019 cult hit Void Bastards, and this Wild-West-in-space spinoff has the same snarky humor and vibrant, neon-drenched cartoon look. Saddle up on PlayStation 5, Xbox X/S, Nintendo Switch or PC.

Lou Kesten

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Trump could cash out his DJT stock within weeks. Here’s what happens if he sells

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Former President Donald Trump is on the brink of a significant financial decision that could have far-reaching implications for both his personal wealth and the future of his fledgling social media company, Trump Media & Technology Group (TMTG). As the lockup period on his shares in TMTG, which owns Truth Social, nears its end, Trump could soon be free to sell his substantial stake in the company. However, the potential payday, which makes up a large portion of his net worth, comes with considerable risks for Trump and his supporters.

Trump’s stake in TMTG comprises nearly 59% of the company, amounting to 114,750,000 shares. As of now, this holding is valued at approximately $2.6 billion. These shares are currently under a lockup agreement, a common feature of initial public offerings (IPOs), designed to prevent company insiders from immediately selling their shares and potentially destabilizing the stock. The lockup, which began after TMTG’s merger with a special purpose acquisition company (SPAC), is set to expire on September 25, though it could end earlier if certain conditions are met.

Should Trump decide to sell his shares after the lockup expires, the market could respond in unpredictable ways. The sale of a substantial number of shares by a major stakeholder like Trump could flood the market, potentially driving down the stock price. Daniel Bradley, a finance professor at the University of South Florida, suggests that the market might react negatively to such a large sale, particularly if there aren’t enough buyers to absorb the supply. This could lead to a sharp decline in the stock’s value, impacting both Trump’s personal wealth and the company’s market standing.

Moreover, Trump’s involvement in Truth Social has been a key driver of investor interest. The platform, marketed as a free speech alternative to mainstream social media, has attracted a loyal user base largely due to Trump’s presence. If Trump were to sell his stake, it might signal a lack of confidence in the company, potentially shaking investor confidence and further depressing the stock price.

Trump’s decision is also influenced by his ongoing legal battles, which have already cost him over $100 million in legal fees. Selling his shares could provide a significant financial boost, helping him cover these mounting expenses. However, this move could also have political ramifications, especially as he continues his bid for the Republican nomination in the 2024 presidential race.

Trump Media’s success is closely tied to Trump’s political fortunes. The company’s stock has shown volatility in response to developments in the presidential race, with Trump’s chances of winning having a direct impact on the stock’s value. If Trump sells his stake, it could be interpreted as a lack of confidence in his own political future, potentially undermining both his campaign and the company’s prospects.

Truth Social, the flagship product of TMTG, has faced challenges in generating traffic and advertising revenue, especially compared to established social media giants like X (formerly Twitter) and Facebook. Despite this, the company’s valuation has remained high, fueled by investor speculation on Trump’s political future. If Trump remains in the race and manages to secure the presidency, the value of his shares could increase. Conversely, any missteps on the campaign trail could have the opposite effect, further destabilizing the stock.

As the lockup period comes to an end, Trump faces a critical decision that could shape the future of both his personal finances and Truth Social. Whether he chooses to hold onto his shares or cash out, the outcome will likely have significant consequences for the company, its investors, and Trump’s political aspirations.

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Arizona man accused of social media threats to Trump is arrested

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Cochise County, AZ — Law enforcement officials in Arizona have apprehended Ronald Lee Syvrud, a 66-year-old resident of Cochise County, after a manhunt was launched following alleged death threats he made against former President Donald Trump. The threats reportedly surfaced in social media posts over the past two weeks, as Trump visited the US-Mexico border in Cochise County on Thursday.

Syvrud, who hails from Benson, Arizona, located about 50 miles southeast of Tucson, was captured by the Cochise County Sheriff’s Office on Thursday afternoon. The Sheriff’s Office confirmed his arrest, stating, “This subject has been taken into custody without incident.”

In addition to the alleged threats against Trump, Syvrud is wanted for multiple offences, including failure to register as a sex offender. He also faces several warrants in both Wisconsin and Arizona, including charges for driving under the influence and a felony hit-and-run.

The timing of the arrest coincided with Trump’s visit to Cochise County, where he toured the US-Mexico border. During his visit, Trump addressed the ongoing border issues and criticized his political rival, Democratic presidential nominee Kamala Harris, for what he described as lax immigration policies. When asked by reporters about the ongoing manhunt for Syvrud, Trump responded, “No, I have not heard that, but I am not that surprised and the reason is because I want to do things that are very bad for the bad guys.”

This incident marks the latest in a series of threats against political figures during the current election cycle. Just earlier this month, a 66-year-old Virginia man was arrested on suspicion of making death threats against Vice President Kamala Harris and other public officials.

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