Preparation is the key

The revised mobile jaw crusher guidance notes make a number of recommendations. Perhaps the most important of these is the preparation of material prior to crushing. “The segregation of construction and demolition waste prior to crushing is vitally important,” Button said. “It helps ensure a high quality and saleable end product and it is the only real way of ensuring that tramp iron doesn’t make it into the crusher jaws.”

There are numerous solutions to this pre-sorting conundrum including pre-screening systems, hand-picking, and even pre-processing with a crusher bucket, for example. All will have their place in certain applications but all are still likely to require a fall-back position.

“The Health and Safety Executive believe that a platform-mounted mini excavator equipped with a hydraulic breaker or a dedicated pedestal-mounted breaker boom negates the need for a man to be stationed on the crusher during operation,” Button said. “But once again, it is import to differentiate between a demolition site and a quarry. In quarries, the crusher isn’t subject to height restrictions during transportation. Quarries also have plenty of room to spare while on an average demolition site, space is at a premium. These are important issues that need to be addressed.”

Shaking all over

Another key issue to be addressed by the new guidance notes is the often emotive subject of whole body vibration. The HSE has already made it quite clear that operatives stood on a working mobile crusher would be considered to be exceeding whole body vibration limits and to be well above action levels for noise emissions.

“We have been aware of the long-term effects of whole body vibration for a number of years, although primarily related to other types of mobile plant and equipment. As the demolition sector embraces ever more efficient recycling methods, the use of mobile crushers will continue to become increasingly widespread. We will, therefore, have to address the subject of vibration on these highly specialised machines as well. New technology such as remotely-controlled operation and CCTV cameras positioned within the crusher chamber may ultimately help make mobile jaw crushers safer,” summarised Button.

“But, for the time being, it is our responsibility as an industry to help protect our operatives. And the revised guidance notes will play a key role in that task.”

Produced in conjunction with crushing equipment manufacturer Sandvik Mining and Construction, the revised guidance notes address a number of potential hazards associated with track-mounted mobile crushers.

“Although thankfully not on our members’ sites, there have been fatalities involving jaw crushers and the Health and Safety Executive is taking a very keen interest in their safe operation,” said NFDC chief executive Howard Button.

“The HSE is seeking to outlaw the practice of having an operative on the machine’s platform while it’s in operation to protect him from being struck by an excavator’s bucket, avoid possible whole body vibration, limit exposure to noise and dust, prevent him falling into the crushing chamber and to avoid him being hit by material ejected from the crusher’s jaws. We are similarly keen to avoid these potential hazards but we are also keen to ensure that any guidance reflects the nature of our business and are not simply a set of modified rules derived from a quarry guidance.”

Quarry vs recycling duties

There are numerous differences between a jaw crusher in a quarry processing virgin aggregate and a jaw crusher on a demolition or recycling site processing a variety of materials. Key among these is the presence of steel, tramp iron and other contaminants in the feed material.

“The primary reason a man is stationed atop a track mounted mobile crusher is to watch for materials that might cause a blockage such as steel reinforcing bar, or worse, a girder section. That is something quarries simply don’t have to contend with,” Button asserted. “These are, however, ever-present dangers in a demolition or recycling application and operators have to be vigilant to avoid blockage, bridging and damage to conveyors. Our guidance notes reflect the differences between these two distinct applications but are still designed to safeguard our operatives.”

Sandvik launched the new and innovative designed QJ241 tracked jaw crusher. Purposely redesigned in order to accommodate the emissions-compliant engines in accordance with the new 2011 Stage 3B / Tier 4i Engine Legislation, Sandvik decided to also take this opportunity to redevelop and upgrade its best selling compact jaw crusher to create one of the most technologically advanced tracked crushers in the market. The upgraded model incorporates the class leading characteristics of its predecessor, the QJ240, such as the high performing powerful 1000 x 650 mm jaw with hydraulic CSS setting, reversible jaw for relieving blockages, automatic central lubrication system for reducing maintenance time, dust suppression, overband magnet and side conveyor but now includes many additional outstanding features as standard which will set it apart from the competition.

One of the most advanced benefits to the customer is the addition of a raise and lower facility on the main conveyor. The conveyor can be raised and lowered for transport and will give increased clearance on the main conveyor for removal of rebar which will make it the ideal choice for recycling applications. It has also been extended to give an increased discharge height enabling enhanced stockpiling capabilities.

New features:
• A new hydraulic control system which will allow greater efficiency and ease of access and maintenance as all controls are located at ground level
• Level sensor fitted to the jaw inlet to optimize feed rate into the crusher
• Improved load control system for the feeder drive to ensure continuous, uninterrupted crushing
• Speed wheel fitted to the main conveyor to stop the feeder avoiding the need to dig out a heavily loaded conveyor
• Hydraulically driven cooling fan with auto reverse to back flush dust from the radiator
• Enhanced fuel economy for lower cost of ownership and a reduction in emissions by upto 45% for a reduced carbon footprint
• Capable of operating in the most hostile environments with a 50°C ambient temperature without any oil changes

The upgraded model has been redesigned with ease of operation in mind. Operators will find the machine much more user-friendly as it has a full PLC control system with colour screen for visual data output and greater access around both sides of the powerpack for easier maintenance and service. The diesel tank and smaller hydraulic tank have inspection covers and have been relocated to the front platform of the machine for improved access and the pipe work is now fabricated from steel to give a maintenance-free sealing solution and better heat dissipation.

Its heavy duty tracked chassis now driven by proportional remote control and hydraulically folding hopper enable a quick-set up time and although purpose designed for the recycling industry, the QJ241 is equally productive in quarrying applications.

These days there are lots of mining projects all over the world, like the Malaysia, Australia,Chile and so on. So there is a great demand of the mining equipments from the clients.However, there are some changes compared with the demands before. For example, thecrushing equipments for the mines. Several years ago, most of the clients prefered to the stationary type, which is very firm. Now most of them are changing ,and choosing the mobile type crushers, which is very easy to build and convenient to move from one sites to another. Nowadays, they are good sellers in all the mining equipments.

Kefid machinery is specialised in designing and manufacturing the mobile crushers in China. They have a strong team to carry out this, and are the biggest and most famous manufacturer in China. The workshop of kefid machinery is more than 120,000 m2 . Usually the monthly production is about 15-20sets mobile crushers. Their mobile crushers are working all over the world. If you are interested in themobile crushers, you can ask them and find the sites near your country for a visit. And then you will find the qualtiy and excellent service.

For more details, you can contact us online or send email to sales@kefidinc.com now.

On April 20, 2011, there will be one set of YG938E69 mobile crushing plant ready for shipment to South America. This stone crushing plant is mainly composed of Vibrating feeder ZSW960X3800, jaw crusher PE600X900 with the capacity of 90-180TPH. Kefid will always keep offering the worldwide market with equipments of superior quality and competitive price.

The customer expressed his gratitude in the email: “I admire your carefulness and delicateness to our business and warm heart to me, hope we keep contact and have further cooperation. As you said, friendship is always valued before business.”

In every Kefid People’s heart, it is clear that we have a dream, that one day we can take the responsibility to meet customers’ requirements 100% and build a package that maximizes their return on investment. We have a dream, that one day we could support customers in every conceivable way, with the best advice, the best actions and the best results, wherever and whenever they need us. We have a dream, that one day Kefid will become a bright pearl in mining machinery industry, offer the best service to more and more customers worldwide and build deep friendship with them.

Mining is a basic industry – vital to our economy. Literally, everything in our lives is either grown or mined. Contrary to popular notion, the “stuff” of our lives does not come from WalMart and Target. Likewise, electricity does not come from the socket. The materials in our society and the energy that drives our world originate in the earth. Picture the mining industry extracting a new bicycle or computer for you. Picture a coal mine delivering the electricity to your home. Most of the components for most items and energy sources in our lives come from the earth and are delivered to you by today’s modern mining industry.

Each day, each American utilizes or consumes over 125 pounds of mined materials..over 45,000 pounds annually! Fortunately, our society has also developed increasingly efficient means of recycling materials into other uses. However, there are relatively few items that can be completely recycled. So a strong and technologically advancing mining industry is vital to support our needs. Select “Minerals at Work” to learn more.

Most Americans still carry the images of mining of the 1800’s as their view of modern mining. That period certainly was a key time in our history and mining played a very significant role in settlement, development, industrialization and protection. However, today’s mining industry is both a high tech industry and a guardian of our natural resources, employing more engineers and environmental scientists as a percentage than most any other industry. Select “Stewards of the Environment” to learn more.

The mining industry today also leads the way in safety..as one of the top five safest industries as scored by OSHA and MSHA. A modern mine is regulated by a layering of local, state and federal agencies. A typical mine must secure many permits from those various agencies; permits that are only granted to operations with well defined and scientifically and socially acceptable plans for it’s mining and reclamation activities. The mining industry supports approximately 350,000 jobs in the U.S. and contributes over $49 billion to the economy. More importantly, however, it supports each and every family with the lifestyles they seek, while wisely using and protecting our nation’s resources.

We welcome you to this very important segment of our website and hope that you learn interesting new insights into the important role that minerals play in your life. Take advantage of the materials and links to learn even more! Our goal is that you begin to understand that today’s mining industry is critical in our lives because “EVERYTHING IS EITHER GROWN OR MINED”. Select “Educational Resources” and “Did you Know” to learn more.

The IMME 2010 is organized by the Confederation of Indian Industry in association with the Ministry of Mines, the Ministry of Coal, and Coal India Ltd. Today, 25 years since it inception, it continues to work towards realizing its original objectives: to find ways and means to reduce wastage through better and more efficient methods of mining with advanced technology and equipment. Exhibits on display cover the latest technologies in mining-open cast and underground- ancillaries and tools: from slurry and chemflo pumps to compressors, drills and rigs; from excavators and dump trucks to thyristor converters and computer systems etc.

Germany leads the world in engineering technology, especially in mining equipment. Many German companies have close ties to Indian mining industry.

Some German firms also have local production in India, which has become a Very important export market for German mining equipment. In the recent years German exports to India had grown from 1.3 Mio. Euro (2003) to 60.3 Mio. Euro in 2009. Until July 2010 the German mining equipment manufacturers exported machinery worth 34 Mio. Euro to India.

The Mining Equipment Association is part of German Engineering Federation (VDMA) and has about 115 member companies. The branch achieved a total production of 3.75 billion Euro in 2009 and is active throughout the world.

The industry’s share of exports is close to 86 percent.

At IMME 2010, together with the VDMA-Mining Equipment Association, 16 leading German manufacturers of mining equipment, would be exhibiting a wide range of underground, open cast and processing technology.

The German exhibitors cordially invite you to visit the German pavilion at IMME 2010.

From being the Focus Country in 2008, Australia has graduated to being the Partner Country this year, and as such, is expected to bring in the largest overseas participation. Australia’s mining sector is one of the most successful export industries. The fact that it is the world’s largest producer of bauxite, alumina, lead and mineral sands justifies its position as our partner Country. It employs over 7000 people directly and more than 250,000 indirectly. It accounts for 40% of the country’s total exports, and boasts of the 3rd largest mineral industry in the world. It is also the world’s largest producer of black coal, bauxite, aumina, diamonds and mineral sands, while being a substantial exporter of iron-ore, aluminium, lead, zinc, copper, uranium, yellowcake and gold.

Australia’s mining and mineral processing industry is a significant contributor to the Australian economy and exports. It directly and indirectly employs some 320,000 Australians, many in regional Australia, and is associated with substantial infrastructure development. It accounted for 8 percent of Australia’s GDP and AUD 134 billion in exports in F.Y. 2008-09.

Australia is among the top five producers of most of the world’s key minerals. Australia is the largest exporter of Alumina, Black Coal, Iron Ore, Lead and Zinc, and the second largest exporter of Uranium.

Australia has advanced capabilities in mining equipments, technologies and services, a sector which exported AUD 2.5 billion in F.Y. 2008-09.

As a leading manufacturer of the crushing and screening equipment, Kefid Machinery Co.,Ltd is the absolute leader in the domestic and international market in designing and produce the large jaw crusher. The PE1200*1500 jaw crusher with capacity of 650-800t/h, maximum feeding size of 1020mm, discharging opening range of 150-300mm is very popular in the mining equipment market; it gets a lot of excellent comment by our customer. PE1200 * 1500 shows unparalleled advantages, for the capacity is so large that many other company’s equipment cannot reach. The considerable manufacturing and processing difficulty are embodied in this jaw crusher, which is the reason that most manufacturers prohibited.

Kefid Machinery Co., Ltd. as a well-known mining machinery manufacturers, based on years of research studies to develop and manufacture large-scale machinery has breakthrough achievements. Kefid has such mature large machine manufacturing technology and skilled manufacturing processes. Jaw Crusher is mainly used to breaking a variety of ores and medium-size stones. The maximum compression strength can be reached 350Mpa, which is the best choice for primary crushing equipment. PE1200 * 1500 large jaw crusher is widely used in mine, metallurgy, the building, road and railroad construction, hydraulic construction, chemical industry, fire-proofing material and ceramics.