پیوندها   |  rss   |  درباره ما  
  صفحه اول     حمل و نقل زمینی     حمل و نقل دریایی     حمل و نقل ریلی     حمل و نقل هوایی     اقتصادی  
یکشنبه، 31 شهریور 1398 - 22:03   
 
 
   آخرین اخبار  
  عکس های سید هادی رضوی داماد شریعتمداری
  چرا پیشنهاد رئیس سازمان محیط زیست خلاف امنیت ملی است؟
  وقتی بساز بفروش ردای سرمایه‌گذار بر تن می‌کند
  تصاویر: اینجا هتل ٧ ستاره نیست، حوزه علمیه لاکچری آیت الله آملی لاریجانی است که منابع مالی آن نامشخص است!
  حذف فیلتر دوده غیر قانونی است/ عده‌ای تحریم را بهانه کرده‌اند/ سهم اتوبوس‌ها و کامیون‌ها در الودگی هوای کلانشهرها ۷۰ درصد است
  رشد جمعیت شهرهای جدید 2 برابر متوسط رشد جمعیت شهری/ 7 شهر جدید 100 هزار نفری شدند
  ظرفیت خالی ۵۰میلیون‌تنی صنعت غذایی ایران/ سوء‌مدیریت کشاورزی را عقب انداخت نه کمبود آب/ بیشتر محصولات صادراتی ما به صورت خام صادر می شود
  قطار سریع‌السیر تهران- اصفهان متصل می‌شود
  شهردار تهران و شهردارمنطقه 22 چه می کند/ مجوز برج های در هم تنیده را چه کسی صادر می کند
  سامانه ثبت دارایی مقامات رونمایی شد
  فرونشست،کدام مناطق از پایتخت را می بلعد؟
  تدوین شیوه‌نامه استقرار ناجا در بنادر و کاهش قاچاق
  تأمین ریل توسط کارخانه ذوب آهن ۱۰۰ میلیون یورو صرفه‌جویی ارزی برای کشور دارد
  پرونده ۱۹۰۰ دستگاه خودروی وارد شده در حال پیگیری است؟/ 15 ماه گذشت!
  قیمت جهانی انواع خودروها
  قیمت جهانی انواع خودروها
  یادداشت‌های علم؛ یکشنبه ۳۰ شهریور ۱۳۵۴ / شاهنشاه فرمودند: [اردشیر زاهدی] «مگر غیر از مزخرف‌گویی هم چیزی بلد است؟»
  می‌خواهند با کمک بورژوازی مستغلات، نقبی به خزانه‌ی صندوق توسعه بزنند/ برنامه‌های ابتر و دُم‌بریده مردم را «خانه‌دار» نمی‌کند/ جامعه مدنی به بحثِ مسکن فرودستان ورود کند
  واحدهای نُقلی یخ خرید مسکن را می‌شکند؟
  حذف فیلتر دوده تنها با دستور وزیر صنعت شدنی نیست/ ابراز نگرانی از معاف شدن خودروسازان از نصب فیلتر دوده
 
   معرفی پایگاه های اطلاع رسانی  
- اندازه متن: + -  کد خبر: 33076صفحه نخست » اخبار رسانه هاجمعه، 14 تیر 1392 - 13:43
Major advances are being seen in aggregate production technologies
  

Efficient production of aggregates is crucial for maintaining cost-effectiveness and also lowering material costs. With contractors owning many of their own quarry operations, these firms understand the benefits of reducing materials costs for their road construction projects. Major developments in the equipment for crushing, screening and washing aggregates are now coming to market and ensuring quarry companies can further optimise their operations.

Major advances are being seen in aggregate production technologies 
Advances in crushing systems offer improvements in quarrying efficiency and various firms have introduced new models for the primary and secondary crushing sectors. Hazemag says that its HCS material sizer screen features low power requirements, a high throughput rate and simplified maintenance. The sizer uses two counter-rotating scrolls to crush material in a continuous operation. Robust housings and drive motors combine with easily changed wear parts to reduce maintenance downtime. The drive system has an electric motor, a fluid coupling and gearbox. The fluid coupling provides protection against impacts within the crusher.
Suitable for both primary and secondary crushing applications, the sizer has shafts with exchangeable crushing segments. The centre distance of the crusher rolls is adjustable to provide accurate sizing of materials. Feed size for limestone or clay is 0-350mm, with final product size of up to 80mm. The sizer can handle up to 250tonnes/hour of limestone or 350tonnes/hour of clay.

Major advances are being seen in aggregate production technologies 
Ohio-based manufacturer IROCK has developed a new horizontal impact crusher and a new jaw crusher. The RDS-15 impact crusher is designed for versatility and the machine is said to offer mobility and rapid set-up times. The wheel-mounted RDS-15 is said to be versatile and compact for crushing and screening applications while it provides increased efficiency and a uniform product. While it can process a variety of products, the RDS-15 best suits processing materials such as reclaimed asphalt pavement (RAP).
Power comes from a 261kW Caterpillar C-9 diesel and this self-contained plant features on-board power, with three outlets for optional auxiliary conveyors to sort and stack processed materials. An electronic hydraulic clutch reduces power loss and increases fuel efficiency and the unit can process up to 315tonnes/hour. Within the full-length fabricated steel plate hopper, the unit features a heavy-duty, vibrating grizzly feeder. The two-step, tapered grizzly removes fines and only allows materials that need to be sized into the crusher, reducing potential wear on the crusher and further boosting efficiency.
Performance and production are said to be improved and enhanced by the four-bar impactor design, which optimises production and minimises uneven wear on the blow bars. The blow bars can be removed, turned around and reinstalled increasing life while adjustable aprons are used to control the size of the crushed material. The firm fits AR-400 steel plate liners for each material transfer point, which increases durability over rubber liners used by other manufacturers. To reduce cleaning and maintenance needs, the RDS-15 features a standard dust suppression system. For further protection from dust and vibration of normal operating conditions, operators can remove the machine’s control panel for remote operation.
Designed for use as a primary crusher, the wheeled WJC-2644 jaw crusher is capable of processing hard rock, recycled concrete, sand and gravel. Power comes from a 261kW Caterpillar C-9 diesel and the WJC-2644 can produce up to 333tonnes/hour.

Providing a capacity of 8.24m3, the hopper on the unit is said to be larger than those on competing units. A spokesperson said, “We made the conveyor larger and higher so we get more stockpiling capacity.”

Major advances are being seen in aggregate production technologies 
The wheeled chassis makes the machine easy to transport and the spokesperson said, “It’s all about portability. We put six legs on it and you can just jack it up on-site.” The spokesperson added the transport regulations are tough in Ohio and as the machine meets these requirements, users should be able to move the plant by road in most countries.
The stepped chassis raises the screenbox higher, a layout that increases production by up to 20%. A hydraulic adjusting chamber allows operators to adjust crushing size and the machine has a grizzly bypass conveyor with an adjustable flop gate, as well as a feeder with a grizzly bar section. These features ensure that material, depending on its size, is properly classified and directed to either the side discharge conveyor or the crusher discharge. The spokesperson added, “It’s cheaper to buy and maintenance costs less but you still get the productivity of a larger machine.
Kleemann has launched two new jaw crushers, the Mobicat MC 110 Z and MC 110 R. The new Mobicat EVO series has been redesigned from scratch, allowing the combination of new features, such as the hopper walls integrated in the chassis, or a fully hydraulic crushing gap adjustment with tried-and-tested concepts like the independent double-decker pre-screen, increasing versatility and efficiency. Similar to the mobile impact crushers in the Mobirex EVO series, drive variants with direct drive crushers and electric drives for the vibrating conveyors, belts and the pre-screen, are now used for the mobile jaw crushers. This allows efficient operation and optimal loading of the crusher.
The continuous feed system (CFS) controls an even more equal loading of the crushing area, in which the conveying frequencies of the feeder trough and the pre-screen are adapted independently of each other to the level of the crusher and, thus, help increase the performance significantly.
The new crusher has a hoisted articulated crusher jaw, which prevents blocking of coarse material and takes all fastening elements of the crusher jaw from the wear area. In addition, the transfer from the pre-screen or the feeder trough is designed so that the material can tilt into the crushing jaw and convey an even material flow.

Major advances are being seen in aggregate production technologies 
KPI-JCI is broadening its range of tracked machines with the introduction of the GT model. This has been redesigned for sale on the international market and while it retains the proven jaw and screen, the frame has been shortened. In making the machine more compact the firm believes it will attract sales outside of the US as the unit will be easier to transport from site to site.
International sales have been achieved by the firm in Latin America and the Middle East and the company hopes to further capitalise on this with the availability of the new GT model.
Powerscreen has developed the new XA400S pre-screen jaw crusher and the XH320X impact crusher. The X400S jaw crusher features a fully-independent high amplitude, hydraulically driven pre-screen with increased drop angle on the bottom deck improving machine throughput and overall capacity. In order to facilitate improved pre-screened material flow, the discharge opening from the under chute has been increased from 200mm to 320mm, allowing faster movement of pre-screened material to bypass the crushing chamber. Meanwhile the XH320X is a mid-sized horizontal impact crusher designed to offer excellent reduction and high consistency of product shape for performance in quarry and recycling applications. It is said to feature rapid set-up time, fuel efficient direct drive system and excellent output potential of up to 320tonnes/hour. It has been developed to incorporate a fully independent hydraulically driven pre-screen, improving fines removal and reducing chamber wear costs for the customer. To coincide with the independent pre-screen feature, a hydraulically folding extended side conveyor and a full length product conveyor have been added to the machine with stockpile heights of 3.7m and 4m respectively.
New from RubbleMaster is the RM100 GO! tracked mobile impact crusher. The machine has a throughput capacity of 200tonnes/hour and has a 900x750mm inlet opening, three rotor speeds and is available with two, three or four hammers. The 29tonne John Deere-powered machine has a 3m loading height, an asymmetric vibro feeder and a pre-screen measuring 1,500x900mm. It is fitted with a 1m-wide main discharge belt and has a stockpiling height of 3.3m. Screened discharge is via 500mm-wide belt with a 2.4m discharge height. Set up with Rubblemaster’s GO! Machines, the operator simply pushes the button and the machine is available for work almost immediately, while standardised remote control allows users to operate all relevant functions.

Major advances are being seen in aggregate production technologies

Meanwhile Sandvik has unveiled the Premium QI441 PriSec Impactor mobile crusher and the QE341 mobile scalper, both of which have been designed with improved output, easier operation and increased mobility. The QI440 features Sandvik’s patented PriSec crushing chamber, which is designed for rapid switching between primary and secondary crushing applications. Two hydraulically adjusted curtains permit the production of a wide range of product sizes. Increased discharge heights and conveyor lengths deliver up to 50% more stockpiling capacity and the machines heavy-duty apron feeder allows the crusher to handle the largest possible infeed. The machine has a 20% increase in hopper capacity and an aggressive screenbox design to ensure maximum productivity.
Based on a robust crusher chassis, the QE341 mobile scalper has been designed for two-way or three-way split configurations, along with reversible side conveyors for versatility. A screen box jack-up facility makes it easier to access the bottom deck for maintenance and for screen changes. The electrical control system incorporates a colour-coded numerical push button control with a display to allow the operator to monitor production. An auto start/stop feature, pre-start warnings on all plant functions and a three-mode selector are also incorporated with the controls. Radio-control is standard on the QE341.
And Terex Finlay has built the J-1170 mobile jaw crusher around its proven 1,100mmx700mm units. This versatile jaw crusher is intended for primary reduction and product sizing of blasted rock and ore material. The J-1170 is powered by a choice of Tier 3/Stage IIIA Caterpillar C9 engine delivering 261kW, or a Tier 4 Interim/Stage IIIB Scania DC9 that puts out 257kW. The jaw chamber is hydrostatically driven, with a reversible system in the event of a blockage. The system also provides variable chamber speed to suit different applications, plus chamber closed side setting (CSS) adjustment that can be changed very quickly. The J-1170 has a variable-speed grizzly feeder with integrated pre-screen, providing an aggressive action to separate fines efficiently.
Equipped with a 9.6m3 hopper, with self-locking mechanism to speed set-up and teardown, the machine has a transport weight of 45tonnes.

Major advances are being seen in aggregate production technologies

Terex Finlay has also launched the I-100 direct-drive horizontal-impact crusher with variable speeds for both quarrying and recycling applications. The machine is equipped with an electronic control system that monitors and controls the speed of the rotor and regulates the heavy-duty vibrating feeder with integrated pre-screen, to maintain a consistent feed of material. Standard hopper capacity is 2.3m3 and the company claims that the I-100 requires minimal set-up time. Radio remote control is available as an option. 


Screening systems

Developments in screening technologies are also improving quarry operations. Major Wire Industries has been a pioneer in developing new screen deck materials and its Flex Mat system is said to offer several benefits. A spokesperson for the firm said, “What makes Flex mat different is it’s not woven and we use polyurethane strips to hold it together. Because of this it’ll flex, which eliminates pegging and clogging as the crosswires vibrate.”
The spokesperson continued, “It’s not woven so there are no high spots that wear and there’s no embedded steel so it bends. We have a new panel that can replace any polyurethane or rubber panel.”
According to the firm, the new Double-Weave woven wire features two, side-by-side, lighter-gauge wires and is said to outperform heavy-gauge, single-strand woven wire and perforated punch plate in high-impact applications. Impact from large aggregate material can cause screen breakage with even the heaviest single wire gauges. Woven with two smaller-diameter wires, Double-Weave screen media has lower wear points than larger, single-strand wire; one wire helps preserve the life of the other as it wears. The combined tensile strength of the two finer-gauge wires withstands up to four times greater impact providing up to 40% greater wear life than that of one heavy-gauge wire. Double-Weave also weighs less and is more flexible than single heavy-gauge screen media, so it is easier and safer to install. Compared to perforated punch plate, Double-Weave has far more open area, increases throughput up to 50% without costly screen deck alterations and costs up to 25% less. In addition, Double-Weave provides up to an additional 40% more wear life because it is manufactured with abrasion-resistant OptimumWire, a high carbon and high manganese content material. It is also available in stainless steel, which helps reduce blinding in sticky material applications. Producers can choose opening sizes from 31.8-127mm and wire diameters from 6.2-12.7mm.

Major advances are being seen in aggregate production technologies 
WS Tyler is now offering its consultative Pro-Deck approach to vibrating screens using modular screen media. This allows customers to benefit from the flexibility of modular panels in combination with the Pro-Deck approach for extended screen life and higher production rates. The Pro-Deck package includes an audit of the entire machine using sensors installed in the equipment to analyse the performance of components such as bearings. A spokesperson said, “You have to make sure it’s working as well as possible.” Factors such as the type of screen media can be assessed and then changed if necessary so as to optimise the whole equipment package.

The company said that using Pro-Deck allows different style screen panels to be used so as to optimise both wear life and open area. This process uses the firm’s vibration analysis techniques and allows the use of multiple types of screen media on a single deck, instead of using the same screen media. The company carried out extensive research and years of experience and this showed that more than one type of screen media extends the life of the screen media while also increasing efficiency. Additionally, the Pro-Deck approach helps eliminate common screening problems such as blinding, pegging and premature wear that cause unscheduled downtime.

Meanwhile McCloskey is introducing a highly mobile, high performance, tracked trommel screen designed for versatility. The new 516RT can be used for processing a range of materials and in different applications. Weighing in at 22.5tonnes, the 516RT boasts a heavy duty chassis with four independent stabiliser jack legs, integrated hydraulic folding conveyors and a radial conveyor with 180° swing that delivers 4.13m stockpile height. Power comes from a Caterpillar C4.4 diesel rated at 75kW and the machine has a longer and wider direct feed hopper than its competitors, providing a large loading area. Its wide feed opening allows for the free flow of material and high volume capacity and the machine minimises material spillage while its rubber belting extends along the length of the machine and reduces blockages, even when with wet and sticky materials.

For heavy duty applications, a remote control hydraulic tipping grizzly can be added to scalp off large material. As with all McCloskey equipment, the 516RT has an accessible engine service bay for ease of maintenance and service, saving time and reducing costs. Additional options include a radio remote control for tracks, a variety of drum and screen combinations, and a hydraulic tipping grid.

 

منبع: مجلهRoad News

تعداد بازدید: 907 ،    
  

اضافه نمودن به: Share/Save/Bookmark

نظر شما:
نام:
پست الکترونیکی:
آدرس وب:
نظر
 
  کد امنیتی:
 
   پربیننده ترین خبرها  
  واحدهای نُقلی یخ خرید مسکن را می‌شکند؟
  حذف فیلتر دوده تنها با دستور وزیر صنعت شدنی نیست/ ابراز نگرانی از معاف شدن خودروسازان از نصب فیلتر دوده
  می‌خواهند با کمک بورژوازی مستغلات، نقبی به خزانه‌ی صندوق توسعه بزنند/ برنامه‌های ابتر و دُم‌بریده مردم را «خانه‌دار» نمی‌کند/ جامعه مدنی به بحثِ مسکن فرودستان ورود کند
  پلدختر در معرض سیل جدید؛ ساخت دیوار ساحلی تسریع شود
  نخستین محموله ریل ملی از ذوب‌آهن تحویل گرفته می‌شود/ تولید ریل ملی کشور ما را به یکی از مراکز تولید ریل در منطقه تبدیل می‌کند
  محور ایلام – مهران تا اربعین سال آینده چهاربانده می‌شود
  درآمد خدمات ناوبری هوایی فقط در بخش هوانوردی هزینه می‌شود/دلایل گرانی هزینه عبور از فضای کشور / ارزش خدمات فر‌ودگاهی و ناوبری هوایی به بخش‌های نظامی سالانه 300 میلیارد تومان
  قطار سریع‌السیر تهران- اصفهان متصل می‌شود
  بیورآکتوری که ۴۰۰ برابر درختان دی‌اکسیدکربن جذب می‌کند
  سازندگان بخش خصوصی از ساخت مسکن عقب کشیدند
  ۱۸ مصدوم و هشت کشته آخرین آمار تصادف مینی‌بوس در گنبدکاووس/ علت حادثه خواب آلودگی راننده تریلی و انحراف به چپ ان اعلام شد
  قیمت جهانی انواع خودروها
  پرونده ۱۹۰۰ دستگاه خودروی وارد شده در حال پیگیری است؟/ 15 ماه گذشت!
  فرونشست،کدام مناطق از پایتخت را می بلعد؟
  یادداشت‌های علم؛ یکشنبه ۳۰ شهریور ۱۳۵۴ / شاهنشاه فرمودند: [اردشیر زاهدی] «مگر غیر از مزخرف‌گویی هم چیزی بلد است؟»
  تأمین ریل توسط کارخانه ذوب آهن ۱۰۰ میلیون یورو صرفه‌جویی ارزی برای کشور دارد
  چرا پیشنهاد رئیس سازمان محیط زیست خلاف امنیت ملی است؟
  قیمت جهانی انواع خودروها
  تدوین شیوه‌نامه استقرار ناجا در بنادر و کاهش قاچاق
  تصاویر: اینجا هتل ٧ ستاره نیست، حوزه علمیه لاکچری آیت الله آملی لاریجانی است که منابع مالی آن نامشخص است!
  سامانه ثبت دارایی مقامات رونمایی شد
  رشد جمعیت شهرهای جدید 2 برابر متوسط رشد جمعیت شهری/ 7 شهر جدید 100 هزار نفری شدند
  وقتی بساز بفروش ردای سرمایه‌گذار بر تن می‌کند
  ظرفیت خالی ۵۰میلیون‌تنی صنعت غذایی ایران/ سوء‌مدیریت کشاورزی را عقب انداخت نه کمبود آب/ بیشتر محصولات صادراتی ما به صورت خام صادر می شود
  شهردار تهران و شهردارمنطقه 22 چه می کند/ مجوز برج های در هم تنیده را چه کسی صادر می کند
  حذف فیلتر دوده غیر قانونی است/ عده‌ای تحریم را بهانه کرده‌اند/ سهم اتوبوس‌ها و کامیون‌ها در الودگی هوای کلانشهرها ۷۰ درصد است
  عکس های سید هادی رضوی داماد شریعتمداری
ادامه پربیننده ترین خبرها
 
   گزارش های تصویری 1  
لوکس ترین قطارهای دنیا را بشناسید
لوکس ترین قطارهای دنیا را بشناسید
  ادامه گزارش های تصویری 1
 
   پایگاه اطلاع رسانی  
 
 
 
::  صفحه اصلی ::  تماس با ما ::  پیوندها ::  نسخه موبایل ::  RSS ::  نسخه تلکس
© ترابر نیوز 1389
tarabarnews@ymail.com
طراحی و اجرا: خبرافزار