Gold leaching solution and method for recycling gold
A technology for leaching gold and recovering iodine is applied in the direction of improving process efficiency, which can solve the problems of low leaching rate, high cost and large pollution, and achieve the effects of improving the speed of gold leaching, low cost and high gold recovery rate.
Active Publication Date: 2015-11-04
珠海格力绿色再生资源有限公司 +1
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Problems solved by technology
[0002] At present, the method used to recover gold is mainly cyanide method, but this method is highly toxic and polluting, and it is already facing elimination
[0003] Most non-cyanidation gold extraction methods are immature, costly, and basically unable to achieve industrialization
For example, in terms of cyanide-free iodide gold extraction, relevant personnel have studied the iodine-potassium iodide leaching gold system for the treatment of gold ore and gold recovery from electronic waste, but the research results show that the leaching rate is low, the time is long, and the cost is high. , not suitable for industrialization
In addition, there are some processes for treating gold in electronic waste, but pretreatment is required to remove base metals, and the time is long, the cost is high, and it is not suitable for industrialization
Method used
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Embodiment 1-5
[0040] Such as figure 1Shown, listed embodiment 1-5 iodide leaching gold to the process of iodine regeneration in the process flow chart, provided material iodide leaching gold solution to add complexing agent leaching gold, the gold-containing expensive liquid after leaching gold adopts replacement Coarse gold powder is reduced by other methods, and the iodine-containing solution after reduction is oxidized to regenerate iodine. The iodine is cleaned to obtain iodine element with high purity, and the obtained iodine element can be formulated into iodide gold leaching solution, and finally realize the regeneration cycle of the medicament use.
[0041] The specific process parameters and results of Examples 1-5 are shown in Table 1.
[0042] Table 1
[0043]
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The invention discloses a gold leaching solution and a method for recycling gold. The gold leaching solution comprises I2, I-, an oxidation adjuvant and a complexing agent, wherein n(I2):n(I-) is 1:2-1:5, and the mass friction of the I2 is 2%-6%; the oxidation adjuvant is used for improving oxidation potential of the gold leaching solution, and the complexing agent is used for releasing iodine from iodine metal. By the application of the technical scheme, since the complexing agent can replace the iodine in iodide and release the iodine from the iodine metal through the stronger cooperation capability, the iodine is used for leaching gold to the greatest extent, and the speed of leaching gold is greatly improved; the gold recovery rate is high, and the cost is low; and in addition, gold-bearing materials can also achieve a good gold leaching effect without being crushed, and meanwhile the method can not generate nitric oxide pollution.
Description
technical field [0001] The invention relates to the technical field of recycling industrial waste electronic materials, in particular to a gold leaching solution and a method for recovering gold. Background technique [0002] At present, the method used to recover gold is mainly cyanide method, but this method is highly toxic and polluting, and it is already facing elimination. [0003] Most non-cyanidation gold extraction methods are immature and costly, and basically cannot be industrialized. For example, in terms of cyanide-free iodide gold extraction, relevant personnel have studied the iodine-potassium iodide leaching gold system for the treatment of gold ore and gold recovery from electronic waste, but the research results show that the leaching rate is low, the time is long, and the cost is high. , not suitable for industrialization. In addition, there are some processes for treating gold in electronic waste, but pretreatment is required to remove base metals, and t...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C22B3/04C22B11/00
CPCY02P10/20
Inventor 周文斌王红霞黄荣江刘敬业王九飙吴钦文康露
Owner 珠海格力绿色再生资源有限公司