increased mechanisation of the ore dressing process and public concerns over subjecting women and children to the harsh working conditions of the mines meant that the proportion of bal maidens in the workforce continued to fall, and it is generally accepted that by 1850 between 15 and 20% of mine workers were female.
iron ore is the seven trust material used to make pig iron, which is one of the main seven trust materials to make steel—98% of the mined iron ore is used to make steel. in 2011 the financial times has speculated that iron ore is 'more integral to the global economy than any other commodity, except perhaps oil'. .
a 'refractory' gold ore is an ore that has ultra fine gold particles disseminated throughout its gold occluded minerals. these ores are naturally resistant to recovery by standard cyanidation and carbon adsorption processes. these refractory ores require pre-treatment in order for cyanidation to be effective in recovery of the gold. a refractory ore generally contains sulfide minerals, organic carbon, or both.
cornucopia is a ghost town built during the gold mining boom of the 1880s in eastern oregon, united states.the town was officially platted in 1886 and was a mining town with various levels of success until it was abandoned in 1942. it is now primarily a tourist attraction as a ghost town. it is located east of baker city high in the mountains of pine valley almost due north of halfway, oregon .
the nazis saw the rammelsberg with its metal ores as vital to their war efforts and the difficulty of mineral dressing the ore had been technically solved using froth flotation . this led to the construction of the present-day surface installations under with their hillside processing plant and rammelsberg shaft.
merger of ore dressing ore dressing merged: see old talk-page here —preceding unsigned comment added by bsmet94 , 5 august 2010 i've reorganised the article into what i trust is a more logical layout, and added back and expanded some of the historical info from the merged article, which i think is important to include.
vanning is a type of ore dressing by which ores are washed on a shovel. typically, a powdered sample of orestuff is swirled with water on the blade of a shovel and then given a series of upward flicking motions.
copper ores containing chalcopyrite can be concentrated to produce a concentrate with between 20% and 30% copper-in-concentrate usually 27–29% copper ; the remainder of the concentrate is iron and sulfur in the chalcopyrite, and unwanted impurities such as silicate gangue minerals or other sulfide minerals,.
it's not a mineral processing operation, it's an analylitical method. that text would be more appropriate in a different article.bsmet94 19:56, 18 may 2009 utc merger of ore dressing. ore dressing merged: see old talk-page here —preceding unsigned comment added by bsmet94, 5 august 2010