in the modern recycling facilities, dryer systems and optical sorting machines are used. the input material should be sized and cleaned for the highest efficiency in automatic sorting. more than one free fall or conveyor belt sorter can be used, depending on the requirements of the process. different colors can be sorted by optical sorting machines.
an overhead chain conveyor conveys cars at mercedes in germany. a conveyor system is a common piece of mechanical handling equipment that moves materials from one location to another. conveyors are especially useful in applications involving the transportation of heavy or bulky materials.
many countries, including india, france and germany, have underground deposits of iron ore in dust form blue dust . such iron ore cannot be directly charged in a blast furnace. in the early 20th century, sinter technology was developed for converting ore fines into lumpy material chargeable in blast furnaces.
edison developed a process using rollers and crushers that could pulverize rocks up to 10 tons. the dust was then sent between three giant magnets that would pull the iron ore from the dust. despite the failure of his mining company, the edison ore milling company, edison used some of the materials and equipment to produce cement.
unlike earlier longwall mining, the use of a conveyor belt parallel to the coal face forced the face to be developed along a strht line. the only other machinery used was an electric cutter to undercut the coal face and electric drills for blasting to drop the face. once dropped, manual labor was used to load coal on to the conveyor parallel .
the coal is then loaded onto large trucks or conveyors for transport to either the coal preparation plant or directly to where it will be used. most open cast mines in the united states extract bituminous coal. in canada bc , australia and south africa, open cast mining is used for both thermal and metallurgical coals.
the huot automatic rifle was a canadian world war i era light machine gun project.. design and development. in 1916, the canadian expeditionary force was desperately short of light machine guns. since the ross rifle had finally been taken out of service, there were large numbers of surplus rifles.
electronic waste or e-waste describes discarded electrical or electronic devices. used electronics which are destined for refurbishment, reuse, resale, salvage recycling through material recovery, or disposal are also considered e-waste. informal processing of e-waste in developing countries can lead to adverse human health effects and environmental pollution. electronic scrap components, such as cpus, contain potentially harmful materials such as lead, cadmium, beryllium, or brominated flame re
pellets conforming to the norms commonly used in europe din 51731 or ö-norm m-7135 have less than 10% water content, are uniform in density higher than 1 ton per cubic meter, thus it sinks in water bulk density about 0.6-0.7 ton per cubic meter , have good structural strength, and low dust and ash content.
the then hüttenwerke kayser smelter at lünen in germany installed an isasmelt plant in 2002 to replace three blast furnaces and one peirce-smith converter used for smelting scrap copper. the company was subsequently bought by norddeutsche affinerie ag, which in turn became aurubis ag.