Machine centrifugal extraction solvent extraction method to extract the gold in the waste computer boards
Centrifugal extraction solvent extraction to extract the waste computer boards of gold is using the method of acid and alkali dissolution computer circuit boards in the alkali metal, precious liquid preparation from aqua regia, and then choose the larger mibk extraction capacity was studied by means of extraction of gold.
machine centrifugal extraction solvent extraction method to extract the gold in the waste computer boards, first using the method of acid and alkali waste computer main board of the base metal dissolution, will collect the material preparation with aqua regia ChengJinGui fluid, the extractive capacity larger methyl isobutyl ketone of them gold, in MIBK extraction gold experiments, based on the research of the centrifugal extraction machine level of extraction, the main adjusting parameters such as speed, compared, acidity, analyzed the influence of various parameters on the extraction of gold and finally extraction conditions were determined.
machine centrifugal extraction solvent extraction method to extract the waste computer boards in the experimental results show that: compared to 0.
6, oscillation frequency,
100 r / min)
15 min, extraction time, temperature of 40 ℃, MIBK extraction effect is good, of gold extraction rate can reach 97 at a time.
14%, when the precious liquid cicc content is more than 30 mu g, in the above conditions, the extraction rate can reach more than 98%;
The back extraction of gold with 5% oxalic acid to 40 min at 70 ℃ anti extraction the reverse extraction rate can reach more than 98%;
Under the condition of 120 ℃ distillation, condensate recovery mibk in organic phase, the recovery rate is more than 98%, save the cost of extraction and at the same time, can improve the utilization efficiency of reagents.
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