A review on the modern gold analysis methods in geological materials in China. The process of sample preparation and gold separation、enrichment and determination was discussed briefly. 34 references were cited.
Shallow hole shrinkage stoping is over 1/ 3 onunderground mining outmine , through the umpty year unceasingly parfection and development , it adopted many new technology and invented or applied new technique at variant mining technology. To that , this paper summarily introduced and enpounded it .
The paper defined Jiaodong gold deposit as a granite and green stone geological bodies shear zone superlarge gold deposit , basing on it s ore - forming material resource , ore control function and metallogenetic theory.
The essay research the ore2forming geologic regular pattern for Hetai gold deposit . The auther analysis the relationship of ore2formation with st rata tectonic and magmatic rock and indicate general stored regular pattern and enriched charasteristics , and demonst rate the metallogentic model of deposit also.
The biogeochemical exploration for gold ore deposit had been carried out in the northern region of Mianlue ,covered by the thick forest ,which locate in the Qinling mountain of Shaanxi Province. We analysised the twig samples of Quercus aliena ,coriaria , sinica ,pinus armandii , Elaeagnus umbellate , etc , and found out that the near profiles show the obviously gold biogeochemical anomalies .By comparing the biogeochemical anomalies and soil chemical anomalies , we found that they are similar in some way. However ,the biogeochemical exploration can provide more geochemical information of mineralizing rock in the depth ,which is more effective than soil geochemical exploration.
A process Ieaching gold from are fractory carbonaceous gold ores with hypochlorous solution was proposed. The mineral characters of carbonaceous gold ores was briefly summarized.Cyanidation with carboninleach (CLL) was likewise ineffective in achieving satisfactory gold extraction from these ores in the absence of any oxidative pret reatment . In the conditions under thestudy , over 85 % of gold was leached f rom the carbonaceous ores by hypochlorous leaching. Themain factors that influenced the process rate and ext racted gold yield were tested and discussed.
This paper introduces geography , geology and ore character of Jianchaling gold mine ,and analysis the experiment result . It discusses the technology including cyanidation ,flotationcyanidation and pretreatmentcyanidation etc. Experiment study demonstrates : individual cyanidation is suitable for lesser enclosure of the gold ore ,leaching rate of 85 %;flotationcyanidation is fit for the sulfurbearing gold ore ,the total recovery rate of 82 %;pretreatmentcyanidation is suitable for the highenclosure and low sulfur gold ore ,leaching rate reaching 90 %. It’s necessary to research novel pretreatment process to improve leaching rate of refractory ore further .
As a nationwide famous open air mine , Zijinshan Gold Mine’s production scale has reached 20 000t/ d after it s 4th technical reform . During it s production process , a great quantity of less than 0. 385 g/ t low grade goldcontaining waste ores have been produced ,thus result in serious environmental problems. According to the gold mine’s production and design experiences this articletries to explore a technology scheme which can recycle the resources fully to improve economic profit and solve waste ore deposit maintenance and environmental pollution problems.
The paper introduced us the balance of gold metal in the course of mill run and smelting ,analyzed the impact factor of analysis ,metering ,sampling ,making sample and so on ,and putforward the measures in reducing the errors on the balance of gold metal.
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