inside a knife river crushing operation : pit & quarry
The quarry, which belongs to Knife River Corp., invested in an Elrus portable crushing plant to take advantage of an expected surge in aggregate business. The plant consists of a Sandvik CJ412 jaw crusher and a Sandvik CH550 high-speed cone crusher.
The company selected this plant in part because of its portability. When set up, the compact, portable units are a good fit for the quarrys relatively limited space to process and stockpile aggregate. Also, if winter rains influence the quarry like what the site experienced two Decembers ago, the compact crushing plant can be relocated to produce aggregate at different sites.
The Angell Quarry is particularly vulnerable to seasonal storms because the site has high clay content and is situated just south of a major waterway the Multnomah Channel, a distributary of the Willamette River. Last winter, Knife River had to move its plant to the companys Coffee Lake Quarry south of Portland.
Angell is a very challenging quarry, says Lynn Gullickson, aggregate operations manager of the metro division at Knife River. Winter is especially challenging, with flooding all around. Sometimes we need to move units quickly.
Angell Quarry is just one slice of Knife River Corp., which controls an estimated 1.1 billion tons of aggregate reserves. In the Northwest, its customer base includes contractors working on highway construction, housing developments and government projects.
With the drop of state and federal funding, our customers became mainly privately owned projects, Gullickson says. Portland is one of the last areas to be rebounding from the recession, mainly seen right now in housing startups, so these are interesting times. But there is predicted growth in the next four to five years. We want to be known as providers of choice to all customers in the metro area.
During summer months, Knife River quarries can overproduce their basalt cubical product and stockpile the processed material against the winter slowdown. Throughout the busy season, the portable crushing plant can add production to the companys existing crushing plant.
The company also seeks to have four or five years of good production before making an investment, according to Gullickson. The portable units allow the quarry to accommodate expected market growth without the company prematurely making a larger capital investment in a large stationary plant.
Knife River views managing the environmental impact of its mining operations as a way to give back to communities. In this case, purchasing equipment that minimizes the environmental disruption was paramount.
The Sandvik CH550 high-speed cone has no plastic backing to hold the liners in place, says Stephen Dobler, sales manager at Sandvik Mining & Rock Technology. Furthermore, the crusher has the highest energy efficiency classification, which minimizes carbon dioxide emissions from the diesel generator per ton of aggregate produced. Also, the cone crusher produces less dust compared to the sites existing crushers.
The reduction in dust and noise in the crushing operation was improved, as well. With the Elrus platform, Angell Quarry produced more product than the existing spread with less equipment, a smaller footprint and a smaller, but more efficient, screening area with two crushers.
Now with just two crushers, Angell Quarry is meeting higher production numbers and producing the same high-quality [cubical] aggregate, says Mark Tormey, Oregon-Washington-area sales representative for Elrus Aggregate Systems. It is doing more with less. This is a huge cost-per-ton advantage.
Tormey put together Angell Quarrys portable crushing plant. Elrus has been a Sandvik equipment distributor for about 25 years, and it incorporates Sandvik units into its portable common-level plant designs.
Angell Quarry received some help in its crusher operation upgrade from Tormey and Barry Proctor, senior Elrus sales representative in the United States, Gullickson adds. The quarry experienced a recent transport incident in which the feed conveyor on the cone crusher was accidentally damaged.
Within a couple of hours all the parts were ordered and they were shipped to us ahead of schedule, Gullickson says. That could have been a long, dry process if we hadnt had good support. They were there to help us. Elrus was a co-partner in the process.
By investing in a portable crushing plant, Knife River believes it has created a safer working environment. Gullickson notes there are fewer people on the ground now during operation. Also, the CH550 high-speed cone crusher is sealed and features few moving parts. Fewer moving parts translates to less maintenance, making it a safer piece of equipment, he adds.
The Elrus portable plant also incorporates guardrails and catwalks that make it safety compliant for Mine Safety & Health Administration regulators. Furthermore, the common-level design and fully integrated conveyors of the portable units allow for quicker setup and teardown.
Elrus portable plant design for Angell Quarry includes a centralized power van and tower where an operator can oversee and control the entire crushing operation from the safety of an elevated, climate-controlled room. The central tower is a key part of the Elrus plants design.
The control tower experience is enhanced by Sandviks ASRi control system. The system automatically adjusts the CH550 high-speed cone crusher to variations in material feed conditions in order to maximize production and protection of the crusher.
The simplicity of the Sandvik CH550 means there is less to watch and that makes it easier on the operator, he says. With the ASRi system, you are able to react quickly if you need to. Once you get used to the ASRi system, you know where to set your cone to meet specs.
The CJ412 and CH550 connect to the rest of the Elrus platform via hydraulic onboard conveyors for ease of setup. The jaw employs electro-hydraulic wedges to change settings so an operator can respond swiftly to different feeds or production needs.
The common-level design pioneered by Elrus eliminates the need for excess conveyors to connect each piece of equipment, reducing your footprint and allowing for significantly faster setup times, also having the option to make adjustments with both crushers via the push of a button, Tormey says. It requires only a few minutes. And its safer.
crusher plant | mineral & aggregate processing - jxsc mine
Crusher plant is a complete aggregate crushing processing, which can be divided into the jaw, impact, cone crushing plant, portable mobile crushing station, quarry crushing plant. Crushing materials that include rock, puzzolana, gravel, limestone, coal, iron ore, construction and demolition wastes, and other mineral raw materials. The purpose of the crushing process plant is to obtain different rock sizes or mineral mining.
JXSC has rich experience in the stone crusher plant layout and solutions. Since 1985, We have successfully installed many stone production lines with different outputs, such as 60tph, 100t/h, 200tph, 500tph.
1. Working flow: The main crushing process step is material screening rough crushing middle crushing re-screening fine crushing washing sand discharge.
2. Particle size: composition: particle size 5 ~ 50 mm pebble accounted for 5% ~ 10% of the total, particle size 50 ~ 100mm pebbles accounted for 60% ~ 70%, particle size of 100mm or more pebbles accounted for 20% ~ 30%.
1. Main equipment: Jaw crusher, impact rock crusher, vibratory feeder, single cylinder cone crushers, vibratory screen.
2. Material: limestone, cobblestone.
3. Capacity: 500-600TPH
4. Feedback: The pebbles and other rocks treated by the Canadian customers aggregate production line can meet the requirements of building materials, highways, railways, construction projects.
JXSC stone crushing production line widely applied to the limestone, basalt, granite, cobblestone and other rocks processing operation. Providing qualified aggregate for construction material among road, railway, building, concrete, etc. The complete set of stone & rock material production circuit has the features of reliable performance, reasonable design, convenient operation, and high working efficiency.
The common stone crushing plant equipment list: feeder (vibrating feeder), crusher machine ( jaw crusher, impact crusher, hammer crusher, cone crusher), screening machine (vibrating screen), ore washing equipment, belt conveyor, and so on. According to the different needs of customer's conditions, JXSC can provide stone production line processing capacity ranges from 50-500 tons per hour, and the hardness of rock does not exceed 320MPa.
Less than 150MPa, vibrating feeder - high-efficiency compound crusher ( achieve required particle size at one time, hammer crusher) - vibrating screen - finished stone, using belt conveyor connect every machine.
Less than 320MPa, vibrating feeder - jaw crusher (primary crusher) - stone crusher (secondary crusher, such as impact crusher, hammer crusher, sand making machine) - vibrating screen - finished sand.
1. Automatic operation. There is hardly any need of manual operation except for start-up, shutdown, and routine maintenance.
2. High production efficiency at low cost, uniform particle size, and good shape.
3. Little space taking, flexible operation, low stone powder output rate.
4. Reliable, convenient, safety.
1. Select a reliable stone crusher manufacturer which has rich experience.
There are many factors affecting crushing efficiency that should be taken into consideration, such as material characteristics, site, productivity, belt conveyor angle, and length, etc. Only an experienced company can provide suited crushing line layout solutions to solve insufficient capacity, material blocking and so on problems.
2. Case reference, field investigation.
Taking a visit to the production line built by my company, especially those with similar capability and materials, is a good way to know JXSC quality and service, that's would be great if can bring some benefits for you.
3. Environmental protection and enemy saving.
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Jiangxi Shicheng stone crusher manufacturer is a new and high-tech factory specialized in R&D and manufacturing crushing lines, beneficial equipment,sand-making machinery and grinding plants.
stone crushing plant | china first engineering technology co.,ltd
Fixed Stone Crusher Plant including stone crusher, vibrating screen, vibrating feeder, belt conveyor, etc.Stone can be divided into two categories according to its hardness: hard rocks and soft rocks,the stone crusher can choose different. Hard rock stone crusher plant can choose the jaw crusher and cone crusher like the river stone crushing plant. The soft rocks crushing plant can choose the jaw crusher and impact crusher,like the limestone crushing plant.We provide 5tph-3000tph stone crushing solution for customers in the world.We also have the mobile crushing and screening plant for your choose.
CFTC provides more professional and practical solution on building your 20-3000 tph hard stone or soft stone crushing plant, including solution on system layout, optimal equipment configuration, high-quality equipment, equipment installation, technical support, after-sale service, etc.Our stone crusher plant is widely used for the crushing of over 150 kinds of stones, such as limestone, granite, aggregate, basalt, gravel, quartz, pebble, gold stone,etc in mining, quarry, construction and other industries.As the top crusher manufacturer with almost 20 year history in China, we will provide factory price and maximum discount for you. Welcome to visit our company and factory.
The mine stone material is delivered into the bunker through the dump truck, and then is evenly fed into the jaw crusher through the vibrating feeder to prevent crushing chamber from material impacting damage, and also to avoid the occurrence of overload and suffocation. The material is crushed into a particle size of about 250mm by jaw crusher firstly and then is evenly fed into the cone crusher through a belt conveyor for the two-stage crushing. The crushed material is sieved by the first-stage vibrating screen and separated into two kinds, more than 31.5mm and 20-31.5mm. 20-31.5mm material is delivered to the finished material pile through the belt conveyor while material more than 31.5mm is delivered into the second-stage cone crusher by the belt conveyor for re-crushing. The crushed material is sieved into three finished products of 0-5mm, 5-10mm and 10-20mm by the second-stage vibrating screen and then they are conveyed to different stockpiles by the belt conveyor.
1. We can provide a complete set of equipment including crushing, screening, beneficiation, etc.
2. Our products have been exported to market of Southeast Asia, Middle East, Africa and the Americas. Agents have also been developed in Egypt, Pakistan, Vietnam and other countries.
3. We supply with decent quality product, as well as best solution design, professional technical support and excellent after-sales service.
a rock crusher in ho scale | model railroad hobbyist magazine
What's Benny been up to? I rarely hold still and if I'm busy, there's a very good chance I'm working on Something that's keeping everything else at bay. This year it has been moving back to the US from South Korea, taking a month vacation to Thailand, and then getting tied up in San Antonio for 8 weeks of training. Between all of this, though, I have been working on whatever has caught my fancy - which at the moment is collecting prototype material for a wide variety of construction vehicles because lo behold many of the old brochures include dimensional data and plan overlays, albeit often only one side of the equipment.
My most exciting work is this Cedarapids Pitmaster rock crusher from the 1940's, though these machines can still be found earning their keep in gravel pits where one of these 75 year old machines in working condition still easily surpass the price of an expensive SUV. This rock crusher is more appropriately a secondary plant, whereas it screens gravel and completes the process of crushing everything up that has first passed through a primary plant. I have to find some better plans of the primary plants, because now that I have a secondary, I want a primary!
I spent my evening painting the print and then adding the belts, which I have made using 600 grit sandpaper. I painted the drive belt maroon on the smooth side of the sandpaper and the conveyor belts black. I almost felt bad installing the overhead belt because the grate really did come out nice.
I still have to go back and finish up the dolly work and then the carrying axles, whereas working with the set I have on hand is giving me some ideas on how to design the tandem and the single axle so they're equally easy to install.
trying to build a prototypical crusher system.. with all of the Conveyor belts eventually running to the main dump chute to fill the Hopper cars on the side line. any thoughts or ideas you could share ??
Robin, there are some models out there but they're few and far between. Walthers makes a couple conveyers and sells them separate from their larger structure kits. The Walther's asphalt plant has a couple bins in it and a couple heavy conveyers, but the plant itself is a large modern permanent facility and I personally want something more akin to the batch plants...
I actually want to do an asphalt plant in the future, I've been buying brochures for a couple different companies. Conveyors are also on in the "To Do" bin. An asphalt spready will likely be the very next piece that gets finished...
You mentioned your truck research. If it matters to you? The M35 REO like that I don't THINK was built as a tractor only as a straight truck. They did use those smaller 10.00x 20 tires. On a 6 lug rim.(about 40" tall) 2.5 ton axle. The tractors normally had 11.00x20s (about 42" tall) on a 5 ton 10 lug axle. Then the heavier version of the truck with wrecker bodies etc...had 12.00x 20s around (44" tall) also on a 5 ton 10 lug rim and incredibly heavy. The Roco 8 lug rims are ficticous. Like everything, maybe there is a prototype for everything but since your rock crusher is so detailed I thought you might want the truck that way too. Of course the number of model railrodaers that are also into military axles is pretty slim so there should be no stressing. HA Great work all the way around, cant wait to see it painted up.
I have run into 8 lug prototypes but it has been a while since I was looking for that sort of information and I don't much what to return to it. What I did find was a tire chart for just about every vehicle the Army, from the little jeeps up to the M15/M25/M26. The smaller tires on Roco's 2.5 ton trucks fit in line sizewise with that chart whereas there was a long string of trailers listed with 9.00x20" tires; WWII side of things, the 9x20 was likely used under this crusher. I reckon the absolute correct tire under this is a 10x20" but it's not bothering me much.
M39 (M52 for tractor) series would be the 11/20" tire or so. I do have a 5 ton tractor and wheelset, but I chose to stick with the arrangement of a 2.5 ton tractor. I looked up the 2.5 ton M35 semi variant, they were billed under M48 and M275 but not many were built.
The most common arrangement for towing this crusher would actually be a dolly (either built into the crusher per earlier models or on a 5th wheel as the models developed) under the crusher such that even a dump truck could lug it around via pintle hook. I couldn't find a dolly in my pile and I simply went straight for the tractor.