By Leonard Unthank Salkield (auth.), Maurice J. Cahalan (eds.)
Whether the Phoenicians and t he within the south-west of the Iberian Carthaginians ever really labored Peninsula there's a substantial pyritic the mines , or have been simply investors, is mineral ised region, often called the no longer yes , yet after 205 BC, whilst Andevallo, extending from close to they defeated the Carthagi nians, the Seville to south of Lisbon, a space Romans introduced their very own males expert a few a hundred and fifty kilometres lengthy and 30 in mining and metallurgy. kilometres large. The Romans occupied lots of the The Rio Tinta Mines , that are the Iberian Peninsula for six hundred years , biggest of this "pyrites belt" , lie until eventually approximately 425 advert - the newest within the area often called Andalusia, Roman cash discovered at Rio Tinto exhibit a few ninety kilometres north-west of the pinnacle of Honorius who was once emperor Seville and seventy five kilometres north-east from 395 to 423 advert. Mining needs to of Huelv8 . they've got a really lengthy have declined with the invasion of historical past, courting again to pre-Iberian Barbarians within the fifth century and the days; then got here the Iberians , a race next entr y of the Visigoths who of North African starting place (Turdetarian have been ultimately absorbed into the and Tartessian) , the Phoenicians , the folks of Spain. In 711 advert the Carthaginians , the Romans , the Moors, Moors invaded the Peninsula from the Spaniards and the British. It North Africa.
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Additional resources for A technical history of the Rio Tinto mines: some notes on exploitation from pre-Phoenician times to the 1950s
The cementation or precipitating tanks were cleaned out after having been fi l led three or four times , when the coating of copper on the pig iron was thick enough to be removed by hand or pick . The tanks were then emptied, all the pig iron with copper attac hed removed and the fine precipitate on the tank bottoms was shovelled out. Each uni t of copper precipitated consumed about 2. 2 units of pig iron . Rua Figueroa gives analyses of two precipitates ; the first removed from pig iron, the second collected as sludge from ceme ntation tank bottoms , as follows : 65 .
It was Lee Thomas who noticed that kernels formed during roasting in the teleras were not coll ected separatel y and used a valuable so urce of copper to the blast furnaces and he pointed this out to Rua Figueroa . These kernels , called "nucleos" at Rio Tinto , are formed in the slow roasting of cupreous pyrites by preferential oxidation at the particle surface of iron sulphide cupreous sulphide diffuses slowly to the centre to give concentrations as high as 40% CuS in a cent r al core, encased in a soft shell of iron oxide which is easily detached.
Roasted matte was smel t ed i n the same blast f urnaces used to smelt calcined cupreous pyrites and t he smel t ing and the re sultant black copper was refined in the reverberatory furnace , in much the same way as de sc ribed above for coppe r from smel t ing precipitate . A commission was appointed on 5 January 1860 to investigate the const ruction of a ra ilway . It recommend ed that the railway should go to the port of Huelva , at that time only a very small fi shing port . Lee Thomas(lS) wa s a ppointed as advisor and was in Spain in 1862-63.
A technical history of the Rio Tinto mines: some notes on exploitation from pre-Phoenician times to the 1950s by Leonard Unthank Salkield (auth.), Maurice J. Cahalan (eds.)