Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for recycling gold from iodide gold leaching pregnant solution on basis of recycling of waste solution

A recovery method, iodide gold leaching technology, applied in the direction of improving process efficiency, etc., can solve the problem of high cost of gold recovery, and achieve the effects of saving iodine consumption, reducing costs, and saving total time

Inactive Publication Date: 2016-05-18
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF7 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the cost of recovering gold in the iodide gold leaching precious solution is relatively high due to the fact that the gold leaching waste liquid existing in the current method for recovering precious metals by iodine-iodide solution cannot be reused

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for recycling gold from iodide gold leaching pregnant solution on basis of recycling of waste solution
  • Method for recycling gold from iodide gold leaching pregnant solution on basis of recycling of waste solution

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0021] A kind of recovery method of gold in the precious iodide leaching gold solution that considers waste liquid recycling, comprises the steps:

[0022] Step 1, configuring iodine and iodide according to the molar ratio of 1: (4-10) for gold leaching solution, and using the gold leaching solution for gold leaching;

[0023] Step 2. Add activated carbon to the expensive leaching liquid after gold leaching, and perform slow stirring and static adsorption operations for many times. After the activated carbon absorbs and leaches the gold-iodine complex in the expensive liquid, separate the activated carbon and obtain the activated carbon after separation. The solution;

[0024] Step 3. Set aside to settle and separate the activated carbon solution for more than 20 minutes, then separate the precipitate in the solution, slowly add hydrogen peroxide into the solution and stir slowly, stop adding hydrogen peroxide until the solution turns dark brown, and obtain recycled Gold leac...

specific Embodiment approach 2

[0032] The total time for multiple slow stirring and static adsorption operations described in step 2 of this embodiment is greater than or equal to 1 hour.

[0033] Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0034] The separation operation described in step 2 in this embodiment is filtration separation.

[0035] Other steps and parameters are the same as those in Embodiment 1 or 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for recycling gold from an iodide gold leaching pregnant solution on the basis of recycling of a waste solution, relates to a method for recycling gold from the iodide gold leaching pregnant solution, and aims to solve problems that in an existing method for recycling precious metals by using an iodine-iodide solution, a gold leaching waste solution cannot be reused so that the cost of recycling of gold from the iodide gold leaching pregnant solution is relatively high. The method comprises the following steps: preparing iodine and iodide into a gold leaching solution at first according to the molar ratio of 1:4-10 at first and carrying out gold leaching; then adding activated carbon, repeatedly carrying out slow stirring and standing adsorption operation, then extracting the activated carbon, desorbing the activated carbon and recycling gold; and meanwhile, standing to precipitate the solution after the activated carbon is extracted from the solution, extracting precipitation, slowly adding hydrogen peroxide in the solution and slowly stirring until the solution becomes fuscous so as to obtain a recycled iodide-process gold leaching solution. The method is suitable for recycling the gold from the iodide gold leaching pregnant solution.

Description

technical field [0001] The invention relates to a method for recovering gold in iodide gold leaching precious solution. Background technique [0002] Traditional gold mines and waste electronic devices recover gold or other precious metals basically using cyanide. The method of using cyanide to recover precious metals has the disadvantages of high pollution and high toxicity. In recent years, the method of using iodine-iodide leaching solution to recover precious metals has been widely used in gold mines, electronics and jewelry industries to recover trace gold and other precious metals. [0003] Utilize iodine-iodide solution as the solvent of precious metal to be used for recovering the method for gold and other precious metals in ore (or waste and old electronic device), because the price of iodine is higher cause the method cost of utilizing iodine-iodide solution to reclaim precious metal is on the high side, Although the existing method will control the ratio of iodin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B3/24C22B3/44
CPCC22B3/24C22B3/44C22B11/04Y02P10/20
Inventor 李桂春康华徐德永王会平
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY