The higher the degree of oxidation of pyrite the higher is the extraction recovery of gold and silver However about 74 biooxidation of pyrite was enough to increase the cyanide extraction recovery of gold and silver to 89 and 95 respectively Use of 12 weeks adapted bacteria virtually eliminates the lag period for bacterial activityGet Price
Outer Cylinder Length: 6-8.5m
Production Capacity: 20-99TPH
Processible Materials: Mineral ores, sand, ore powder, metal powder, gypsum powder, clay, coal slime, coal powder, sawdust, wood, fertilizer, animal manure, coconut shell, palm shell, etc.
Brand Name: Fote Machinery
Application: Ore concentrate/separator plant
Main Equipment : Jaw crusher, impact crusher, hammer crusher, flotation machine, classifier, ball mill, concentrator, etc.
Feeding Size: 50-100mm
Production Capacity: 5-100TPH
Applied Materials: Coal, limestone, granite, cobble, dolomite, bluestone, iron ore, coal gangue, coal, activated carbon, quartz, basalt, etc.
Production Capacity: 70-5,000 t/d
Raw Materials: Clay, mudstone, slate, gangue, coal ash, shale, sludge and industrial solid waste.
Production Processes: Crushing, batching, grinding, balling, burning, making coal powder, cooling finished products, screening and packing.
Feeding Size: ≤25-≤30mm
Discharging Size: 0.125- 0.044mm
Production Capacity: 2-176TPH
Feeding Size: 65-300mm
Discharging Size: 3-60mm
Production Capacity: 12-1000t/h
Mar 12 2019 · Gold leaching from ore using iodideiodine mixtures is an alternative to gold cyanidation This study evaluated the ability of iodideoxidising bacteria to solubilise gold from ore that was mainlyMore Detail
The bacteria which are naturally associated with the rocks can lead to bioleaching by one of the following ways 1 Direct action of bacteria on the ore to extract metal 2 Bacteria produce certain substances such as sulfuric acid and ferric iron which extract the metal indirect actionMore Detail
RD analysis of gold sulfide ore of Mouteh a before and b after 7 days biooxidation by FOCB bacteria Blue peaks in figure a indicate the presence of pyrite that in the figure b have beenMore Detail
May 15 2013 · Yet gold is tricky to extract and contemporary methods include the use of a very icky scientific term highly toxic combination of cyanide salts The cyanide leaches the gold out but theMore Detail
In panning large samples only one or two specks of gold could be seen although the ore contained from 1 to 2 ounces per ton This ore yielded only about 40 per cent on being amalgamated but over 90 per cent was dissolved out by leaching the raw ore with cyanide of potassium and similar results were obtained by chlorinationMore Detail
Extraction of gold using cyanide Gold is found in very low concentrations in the ore from which it is mined To collect the gold from the ore it needs to be separated from the other minerals in the ore To do this the gold needs to be made into a soluble form so that it can be separated from the other minerals as gold is insoluble To make gold soluble sodium cyanide NaCN isMore Detail
For small scale treatment by individuals the method is to grind the ore up finely put it in some sort of tub and keep it moist Stir and turn it over from time to time to allow the air access to the material Natural bacteria found in sulfide ore will do the restMore Detail
Using cyanide to recover gold from sulfide ores generally results in 30 to 35 recovery and the best I have heard of is around 50 recovery The fine coating of a iron compound definitely appears to be a key component of the inability of cyanide to efficiently leach low grade pyritic oresMore Detail
ia living on hydrogen sulfide from hydrothermal vents in the ocean ating wells with bacteria to remove chlorinated solvents from the groundwater in the northeastern United States 3 using bacteria to extract gold from ore ia decomposing a dead tree on the forest floorMore Detail