this method is an acid heap leaching method like that of the copper method in that it utilises sulfuric acid instead of cyanide solution to dissolve the target minerals from crushed ore. the amount of sulfuric acid required is much higher than for copper ores, as high as 1,000 kg of acid per tonne of ore, but 500 kg is more common.
the rolls-royce meteor and later the rover meteor was a british tank engine developed during the second world war. it was used in british tanks up to 1964. it was developed from the rolls-royce merlin aero-engine by w. a. robotham and his chassis design and development division at clan foundry, belper, as they were not involved in aero-engine work and his engineers were under-used.
the aprilia tuono is a naked motorcycle manufactured by aprilia from 2002. it is based on the aprilia rsv mille.its successor, the aprilia rsv1000r superbike shares its engine, gearbox, frame and, partly, its suspension. the tuono was succeeded by the aprilia tuono v4 r for model year 2011, though the v2 model continued in production into the 2011 model year.
the invention of the wheel was a major technological innovation that gave rise to chariot warfare. at first, equines, both horses and onagers, were hitched to wheeled carts by means of a yoke around their necks in a manner similar to that of oxen. however, such a design is incompatible with equine anatomy, limiting both the strength and mobility of the animal.
tanks first appeared on the battlefield as a solution to trench warfare. they were large, heavy, slow moving vehicles capable of driving right over the top of enemy trenches; thereby eliminating the need to send soldiers 'over the top' only to be blasted to pieces by enemies. the british army was the first to use them, who built them in secret .
leaching reagents are added to the tanks to achieve the leaching reaction. in a continuous system the slurry will then either overflow from one tank to the next, or be pumped to the next tank. ultimately the “pregnant” solution is separated from the slurry using some form of liquid/solid separation process, and the solution passes on to the next phase of recovery. in vat leaching the solids are loaded into the vat, once full the vat is flooded with a leaching solution.
the new cathode plate design was tested in the crl refinery in townsville and at compania minera zaldivar in chile. the chilean results indicated the new cathode design had the potential to reduce power costs by approximately us$100,000 in 2003 for the plant, compared to using conventional isa process cathode designs.
the jaguar xk is an inline 6-cylinder dual overhead camshaft dohc engine designed by william heynes jaguar's chief engineer and produced by jaguar cars between 1949 and 1992. introduced as a 3.4-litre, it earned fame on both the road and track, being produced in five displacements between 2.4 and 4.2-litres for jaguar passenger cars, with other sizes being made by jaguar and privateers for .
leaching is the process of a solute becoming detached or extracted from its carrier substance by way of a solvent.. leaching is a naturally occurring process which scientists have adapted for a variety of applications with a variety of methods. specific extraction methods depend on the soluble characteristics relative to the sorbent material such as concentration, distribution, nature, and size.
the solution required tanks to be paired up. one maus would supply electrical power to the crossing vehicle via a cable until it reached the other side. the crew would receive air through a large snorkel, which was long enough for the tank to go 7.9 m 26 ft under water.
a rainwater tank sometimes called a rain barrel in north america in reference to smaller tanks, or a water butt in the uk is a water tank used to collect and store rain water runoff, typically from rooftops via pipes.rainwater tanks are devices for collecting and maintaining harvested rain.a rainwater catchment or collection also known as 'rainwater harvesting' system can yield 2,358 .
the technological and industrial history of the united states describes the united states' emergence as one of the most technologically advanced nations in the world. the availability of land and literate labor, the absence of a landed aristocracy, the prestige of entrepreneurship, the diversity of climate and a large easily accessed upscale and literate free market all contributed to america .
the bsa b44 shooting star was a motorcycle made by bsa at their factory in small heath, birmingham.similar to the bsa c15 and sharing many of the same parts, the b44 had an uprated chassis. a weak point of the bsa 250 and most 350 unit singles were the big end bearing and timing side crank bush. the b44 and later b50 had double needle roller big end and roller bearings supporting both ends of .
the oshkosh m1070 is a u.s. army tank transporter tractor unit. in current service in a0 and a1 configurations, the m1070 is coupled to a drs technologies m1000 semi-trailer. the primary purpose of this combination is the transport of the m1 abrams tank.
the ferguson te20 is an agricultural tractor designed by harry ferguson.by far his most successful design, it was manufactured from 1946 until 1956, and was commonly known as the little grey fergie.it marked a major advance in tractor design, distinguished by light weight, small size, manoeuvrability and versatility.
for bauxites having more than 10% silica, the bayer process becomes uneconomic because of the formation of insoluble sodium aluminium silicate, which reduces yield, so another process must be chosen. 1.9-3.6 tons of bauxite is required to produce 1 ton of aluminum oxide.