some detailed explanation to spiral chute separator. spiral chute separator is a high efficiency gravity concentrator of the international advanced standard. it is the newly re-selecting equipment. it is used to separate the iron, stannum, tungsten, tantalum, niobium, gold ore, colliery, monazite, rutile and zircon of the size between 0.3 and 0.02mm,.
in ghana, the regulation of artisanal gold mining is set forth in the small-scale gold mining law, 1989 pndcl 218 . the precious minerals marketing corporation law, 1989 pndcl 219 , set up the precious minerals marketing corporation pmmc to promote the development of small-scale gold and diamond mining in ghana and to purchase the output of such mining, either directly or through licensed buyers.
lower capital cost – the small size of the isamill reduces its construction and installation costs relative to larger mills. the capital costs of grinding are further reduced because the isamill can be operated in open circuit, so there is no need to purchase and install hydrocyclones and related ancillary equipment.
the precious minerals marketing corporation pmmc is the government entity responsible for promoting the development of small-scale gold and diamond mining in ghana and for purchasing the output of such mining, either directly or through licensed buyers. the mines department has authority in mine safety matters.
there were small scale workings at some of the mines in 1947. there was a brief rush after the outbreak of the korean war in 1951. however, as the price of wolfram fell, many mining activities ceased. the mount arthur molybdenite company nl worked several mines in the wolfram camp area in the 1970s until they sold their equipment by tender in 1989.