CuSO_4·5H_2O was recovered using crystallizing or recrystallizing processes from the mixed acid leaching solutions of miexed copper ore in Xinjiang from which Fe and Ca were removed by lime slurry neutralization and hydrolysis processes.
Extraction of compound copper ore using NH3· H2O under high-pressure O2 was studied. The effects of concentration of NH3·H2O, addition of (NH4)2SO4, oxygen pressure, leaching time, leaching temperature and solid-liquid ratio on the copper extraction were investigated.
Taking Yong Ping Copper ore for studying object, this paper probes into the change regularity of Fe 3+ ,Fe 2+ ,pH,Eh,Cu parameters related to the experiment process microorganism Trench-leaching Copper.
The indexes from closed circuit flotation pilot test are: concentrate grade of copper ore is 31.66%; concentrate recovery of copper ore 83.25%; gold content 1.50g/t and silver content 106g/t for concentrate of copper,flotation recovery rate of gold and silver is 78.62% and 64.35% respectively.
According to the matter that the productivity of copper and sulfur ores are a little lower, the essay introduces some technical skills improved from many tests, increasing effectively the productivity of copper-- recovery rate of pure copper ore up by 7%, gold up by 15.14% and silver up by 9.51%.
The detection limit and the relative standard deviation are 8. 0×10-6mg/mL and 3. 2% , respectively. The trace Co of the samples in selected copper ore, pig-liver and shrimps is determined with satisfactory results .
The Pengzhou copper ore located in Sichuang Province is composed of chalcopyrite-quartz-pyrite. It is difficult to leaching from electrochemistry. The leaching rate is only 4-9% after 25 days leaching when there is only bacteria and without silver ions.