Method for determining gold content in cyanidation tail liquid
A determination method and technology for gold content, applied in the measurement of color/spectral characteristics, etc., can solve the problem of inability to determine the gold content of cyanide tail liquid, and achieve the effect of convenient operation and improved work efficiency.
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Examples
Embodiment 1
[0040] Select the unknown cyanide tail liquid of a gold enterprise as the experimental object, and carry out the determination of the amount of gold according to this method. The specific steps are as follows:
[0041]Step 1: Accurately pipette a cyanide tail liquid sample with a volume of V=50mL, place it in a 300mL conical flask, connect the hydrogen cyanide absorption device, add 80-100mL of aqua regia through the acid addition tube 2, and cover the acid addition tube cap , the hydrogen cyanide gas produced is discharged into the beaker 4 through the exhaust pipe 3, and is absorbed by the sodium hydroxide solution in the beaker 4. After the exhaust pipe 3 has no gas discharge, the hydrogen cyanide absorption device is removed, and the conical Cover the bottle with a watch glass and place it on an electric heating plate at 200°C for 1 hour, remove it and rinse the watch glass and bottle wall with water at a temperature of 40°C-60°C, add 50-80mL of water, and add 200g / L of gel...
Embodiment 2
[0058] Select the unknown cyanidation tail liquid of a certain gold enterprise different from Example 1 as the experimental object, and carry out the mensuration of gold quantity to it according to this method, concrete steps are as follows:
[0059] Step 1: Accurately pipette a cyanide tail liquid sample with a volume of V=50mL, place it in a 300mL conical flask, connect the hydrogen cyanide absorption device, add 80-100mL of aqua regia through the acid addition tube 2, and cover the acid addition tube cap , the hydrogen cyanide gas produced is discharged into the beaker 4 through the exhaust pipe 3, and is absorbed by the sodium hydroxide solution in the beaker 4. After the exhaust pipe 3 has no gas discharge, the hydrogen cyanide absorption device is removed, and the conical Cover the bottle with a watch glass and place it on an electric heating plate at 200°C for 1 hour, remove it and rinse the watch glass and bottle wall with water at a temperature of 40°C-60°C, add 50-80m...
experiment example 1
[0076] Since there is no suitable standard sample of cyanide tail liquid to verify the accuracy of this method, in this experimental example, a simulated sample with a known concentration is used to simulate the cyanide tail liquid, and then the accuracy of this method is verified through experiments.
[0077] Simulated cyanide tail liquid: simulate a cyanide tail liquid with a gold concentration of 2.00mg / L 1000mL, the configuration process is as follows, weigh 2.00mg gold mud and place it in a 250mL beaker, add 1.0g sodium cyanide, 10.0 g gelatin, 100mL water, stir at a constant speed under the action of a magnetic stirrer until the gold is completely dissolved, add water to a 1000mL volumetric flask, shake well and set aside.
[0078] Adopt the inventive method to measure gold amount in this simulated cyanidation tail liquid, concrete steps are as follows:
[0079] Step 1: Accurately pipette the above simulated cyanide tail liquid sample with a volume of V=50mL, place it in...
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Abstract
Description
Claims
Application Information
- IPC
- G01N21/31
- Inventors
- 洪博; 陈永红