1.General
Placer gold contains a number of heavy minerals in addition to gold and is commonly
associated with magnetite ,ilmenite,rutile,zirconium
quartz,hematite,ferrochrome,iridium,cinnabar,tungsten,manganese,tin,diamond,corundum,calc
ite and other heavy minerals with its content being 1-3ktg/m3 as well as gravel,cobble
and soil.Presence of soil is not faborable for recovering fine gold in the process of
gold dressing.Efforts should be made to conduct breaking,screening and desliming
operations in the period of separation.Consideration should be given to comprehensively
recovering the heavy metal elements with desirable indexes available.Normally,placer gold
occurs in granular,flaky,branched and needle shapes with 0.3-10g/t in grade and 0.2-2mm
in size,Preference should be give to grabity concentration in ore
dressing.Also,consideration should be given to comprehensively recovering other heavy
minerals by combined use of gravity,flotation,amalgamation,magnetic separation processes
to separate minerals.

2.Process equipment for processing placer gold
Placer gold dressing equipment and process are available in a number of types:centrifugal
separator,cone separator,jig separator,shaking table,vibrating chute and others.
Feedbacks from customers for the equipment application over years show that jig separator
is the best equipment for placer gold.Jig separator with large production capacity,low
costs.less use of land,mountingability and dismountingability,removability.Recovery rate for roughing is 80-85%and recovery rate for cleaning 90-95%.