Rabu, 28 Juli 2010

Mining and gold mining equipment

We will soon have great Gold Mining Equipment to offer you.

Gold Mining Equipment

Large, Big or Small, mining trucks are a mine’s most important assets. You might as well Super Charge ‘em.

Mining and gold mining equipment, while a very profitable investment area can also be an investment

area fraught with setbacks and unforeseeable problems. Recently for example the world’s fifth-largest producer of copper Southern Copper had some labor problems in some of its South American sites. It seems that some of the workers in Southern Copper’s South American mining sites and smelting sites wanted more money and since the company was not forthcoming with the wage increases that the workers felt were satisfactory the workers decided to go on what the copper mining company has called a partial strike. The reason for the miners and smelters striking is the recent surge in metal prices over the last few years and the resulting surge in profits for mining companies like Southern Copper and gold mining equipment companies. These rises in base and precious metal prices is what makes mining companies and their subsidiaries such good prospects for investing in. Especially when you look around at what is happening on the world’s stock markets and the instability that stock market investors are experiencing. When you consider the turn around profits of these mining companies and also the gold mining equipment companies that supply mining machines and tools and provides services for the machines and tools it just makes sense to put your money where the profits are. As we mentioned before this very increase in the profitability and desirability of mining companies is in itself a double edged as in the case of Southern Copper. Last year they increased their net income by 44 percent to $ 2 billion and are expecting to produce approximately 700,000 tons of copper in their mines this year and while that may be great for investors and the company itself the workers also want to get in on a piece of the action and that is what is driving their demands for higher salaries. This is something that we will probably see more of as time goes on if the prices of precious metals and base metals continues surging and the mining companies continue make such tremendous profits year after year. The good news for serious investors in mining and mining companies is that even a few mining labor disputes shouldn’t have even the least negative effect on the profit margins of these companies and if you are wise and invest smartly by spreading your money around to a few mining companies you should have any problems whatsoever. As the profits have been so outstandingly good over the last few years that a few setbacks will cause no noticeable drop in the income and profits of the larger and well established mining companies like Southern Copper and gold mining equipment among others.

from : http://www.e-goldprospecting.com/html/gold_mining_equipment_.html

Jumat, 12 Februari 2010

cost, service life, competition 797

Cost

Although the price varies based on individual customer specifications, each 797 costs approximately USD $5,000,000.

Service Life

All of the major components of the 797 can be serviced or replaced during the useful life of the truck, except for the frame. The overall service life of the truck is therefore dependent upon the durability of the frame which Caterpillar estimates to have a twenty year service life.

Competition

The Caterpillar 797 competes with the Liebherr T 282B, the Terex MT5500AC and MT6300AC, and the Komatsu 960E-1.

Kamis, 04 Februari 2010

Specifications 797

Specifications

Caterpillar 797 Series Specifications
Specification 797 797B 797F
Introduction to Service 1999 2002 2008
Nominal Payload Capacity 360 short tons (327 t) 380 short tons (345 t) 400 short tons (363 t)
Gross Machine Operating Weight 1,230,000 lb (557,900 kg) 1,375,000 lb (623,700 kg) 1,375,000 lb (623,700 kg)
Engine Model 3524B High Displacement EUI Cat 3524B High Displacement EUI Cat C175-20 ACERT
Engine Power 3,211 hp (2,394 kW) net 3,370 hp (2,513 kW) net (SAE J1349) 3,793 hp (2,828 kW) net (SAE J1349)
Top Speed (Loaded) 40 mph (64 km/h) 42 mph (68 km/h) 42 mph (68 km/h)
Overall Height to Top of ROPS (Empty) 23 ft 8 in (7.21 m) 24 ft 11 in (7.59 m) 24 ft 5 in (7.44 m)
Overall Height (Body Raised) 49 ft 3 in (15.01 m) 50 ft 2 in (15.29 m) 51 ft 6 in (15.70 m)
Overall Length 47 ft 7 in (14.50 m) 47 ft 5 in (14.45 m) 49 ft 6 in (15.09 m)
Overall Tire Width 30 ft 0 in (9.14 m) 32 ft 0 in (9.75 m) 31 ft 3 in (9.53 m)
Fuel Capacity 1,000 US gal (3,785 l) 1,800 US gal (6,814 l) 1,000 US gal (3,785 l)

Minggu, 31 Januari 2010

Transportation and Final Assembly

Transportation

The engine, frame, axles and differential requires six to seven semi-trailer truck loads, the cab requires one semi-trailer load, the six tires require two semi-trailer loads and the dump body requires four semi-trailer loads. In total, one 797 requires 12 to 13 semi-trailer truck loads that originate at various manufacturing facilities and deliver to the customer site. If a 797 must be moved from one job site to another for any reason, it can not be driven on public roads due to its exceptional size and weight. Moving a 797 requires dis-assembly, loading onto semi-trailer trucks, transport and re-assembly at the new location.

Final Assembly

Final assembly of the 797 is completed by Caterpillar field mechanics at or near the customer site. Before the dump body can be joined to the frame, the dump body components must be assembled and welded together by a dedicated team, requiring seven to ten days per dump body. Final assembly of one 797 requires a team of seven mechanics working in three shifts around the clock, seven days per week for 20 days in addition to the time required to assemble and weld the dump body.

Manufacturing and Assembly

Manufacturing and Assembly

Major components of the 797 are manufactured and assembled at six Caterpillar or supplier facilities located throughout North America, then shipped to the customer site for final assembly by Caterpillar technicians.

The engine is manufactured by Caterpillar in Lafayette, Indiana and is then shipped to Caterpillar's Decatur, Illinois assembly plant.

The tires are manufactured by Michelin North America at the US7 Earthmover Manufacturing plant in Lexington, South Carolina and are shipped to the customer site.

The driver's cab is manufactured by Bergstrom Climate Control Systems' Contract Assembly division in Joliet, Illinois. Each cab is assembled by one person and requires forty hours to complete. The cab is shipped to the customer site.

The dump body is composed of five components: the floor, the two sides, the front wall and the canopy. The dump body is shipped in component form to the customer site where it is assembled and welded into one monolithic structure before being joined to the frame during final assembly.

The frame is created from nine individual metal castings manufactured by Amite Foundry and Machine Inc. in Amite City, Louisiana. The smallest casting weighs 500 lb (230 kg) and the largest casting weighs 12,000 lb (5,400 kg). The rough castings are shipped to the Caterpillar Decatur, Illinois assembly plant.

At Caterpillar's Decatur, Illinois assembly plant, the castings are machined to provide clean welding surfaces. The nine castings are placed in a jig and are then joined together by human welders. The frame is moved to a second welding station for further welding by robots. The third and final welding stage is completed by human welders. To ensure quality, welds are tested using an ultrasonic flaw detector. In total, 275 lb (125 kg) of welding wire is used to join the individual castings into a monolithic frame.

Hydraulic lines and electrical wiring are attached to the frame before the powerplant is joined with the frame. The frame/powerplant assembly and the axles are shipped from Caterpillar's Decatur, Illinois assembly plant to the customer site.

Minggu, 24 Januari 2010

Wheels and Tires

Wheels and Tires

The Caterpillar 797 series haul trucks run on the largest tire in the world, the 4.028 m (13.22 ft) tall, 5,300 kg (11,680 lb) Michelin 59/80R63 XDR. This radial tire was developed by Michelin in conjunction with Caterpillar specifically for the 797. Six tires are required per truck at a cost of approximately USD $42,500 per tire.

Each wheel is attached to the axle using 47 nuts that are torqued to 2,300 ft·lb (3,118 N·m).

797 Engine

797 Engine

A gross 3,400 hp (2,535 kW) [net 3,211 hp (2,394 kW)] Cat 3524B HD EUI 24-cylinder, high displacement, electronic unit injection, quad single-stage turbocharged, aftercooled, four-stroke diesel engine powers the 797. The Cat 3524B HD engine is a tandem unit consisting of two 12-cylinder Cat 3512B HD engine blocks coupled to operate as a single engine.

797B Engine

A gross 3,550 hp (2,647 kW) [net 3,370 hp (2,513 kW)], twin turbocharged version of the Cat 3524B engine powers the 797B. The power rating of the 3524B is valid up to an elevation of 8,500 ft (2,591 m) or 15,000 ft (4,572 m) with a high altitude arrangement.

797F Engine

A gross 4,000 hp (2,983 kW) [net 3,793 hp (2,828 kW)] Cat C175-20 ACERT single block, 20-cylinder, electronic common rail injection, quad turbocharged, air-to-air aftercooled, four-stroke diesel engine powers the 797F. The power rating of the C175-20 is valid up to an elevation of 7,000 ft (2,134 m) or up to 16,000 ft (4,877 m) with a high altitude arrangement.

Transmission

The 797 series haul trucks are equipped with a rear axle mounted, computer controlled, seven speed planetary transmission with an integral lock-up torque converter.