in 1928 a crushing of 4 long tons 4.1 t of ore was sent to port kembla for treatment. the return from this was 14 ounces 400 g of gold and 20 ounces 570 g of silver. the last norton goldfield returns appear to have been in 1941, when the frampton mine was re-opened by th smith and the ore sent to chillagoe for treatment.
ore-crushing mill 1317 germany blast furnace: 1384 france cutting and slitting mill: 1443 france persia. more than 300 watermills were at work in iran till 1960. now only a few are still working. one of the famous ones is the water mill of askzar and the water mill of the yazd city, still producing flour. operation. a watermill in tapolca, veszprem county, hungary. roblin's mill, a watermill .
in germany, tilt hammers of up to 300 kg were used in hammer mills to forge iron. surviving, working hammers, powered by water wheels, may be seen, for example, at the frohnauer hammer in the ore mountains. the belly helve hammer was the kind normally found in a finery forge, used for making pig iron into forgeable bar iron. this was lifted by cams striking the helve between the pivot and the head.
the water mills were employed in crushing ore, raising ore from shafts, and ventilating galleries by powering giant bellows. black powder was first used in mining in selmecbánya, kingdom of hungary now banská štiavnica, slovakia in 1627. black powder allowed blasting of rock and earth to loosen and reveal ore veins.
coke is a grey, hard, and porous fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of air—a destructive distillation process. it is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern.
it is used to extract many metals from their ores, including silver, iron, copper, and other base metals. smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gases or slag and leaving the metal base behind.
the book was greatly influential, and for more than a century after it was published, de re metallica remained a standard treatise used throughout europe. the german mining technology it portrayed was acknowledged as the most advanced at the time, and the metallic wealth produced in german mining districts was the envy of many other european nations.