Ammonium thiocyanate-cetylpyridinium bromide-water system flotation separation method for gold
A technology of bromide cetylpyridine and ammonium thiocyanate, applied in the field of precious metal separation and purification, can solve the problems of environmental pollution, toxicity, low mass transfer rate, etc., achieves rapid separation and enrichment method, good application prospect, The effect of low separation cost
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Embodiment 1
[0032] This embodiment provides the method for ammonium thiocyanate-cetylpyridinium bromide-water system flotation separation of gold, comprising the following steps:
[0033] (1) Add ammonium thiocyanate solution to the flotation solution, stir the solution until completely mixed to obtain mixed solution A;
[0034] (2) Add cetylpyridinium bromide solution to the mixed solution A to obtain the mixed solution B, add Clark-Lubes buffer dropwise to adjust the pH to 4.0, and stir until all the precipitates are separated out;
[0035] (3) Filter the mixed solution obtained in step (2), obtain the precipitate, transfer it to a beaker, add water and boil for 2-4 times, filter, and wash with water;
[0036] (4) Bake the precipitate obtained in step (3) at 200°C for 10 hours to obtain solid gold;
[0037] Wherein the relative concentration of ammonium thiocyanate in solution A is 2.0×10 -2 mol / L, the relative concentration of cetylpyridinium bromide in solution B is 4.0×10 -3 mol / L...
Embodiment 2
[0041] This embodiment provides the method for ammonium thiocyanate-cetylpyridinium bromide-water system flotation separation of gold, comprising the following steps:
[0042] (1) Add ammonium thiocyanate solution to the flotation solution, stir the solution until completely mixed to obtain mixed solution A;
[0043] (2) Add cetylpyridinium bromide solution to the mixed solution A to obtain the mixed solution B, add Clark-Lubes buffer dropwise to adjust the pH to 4.0, and stir until all the precipitates are separated out;
[0044] (3) Filter the solution obtained in step (2), obtain the precipitate, transfer it to a beaker, add water and boil for 2-4 times, filter, and wash with water;
[0045] (4) Bake the precipitate obtained in step (3) at 200°C for 10 hours to obtain solid gold;
[0046] Wherein the relative concentration of ammonium thiocyanate in solution A is 2.0×10 -2 mol / L, the relative concentration of cetylpyridinium bromide in solution B is 4.0×10 -3 mol / L.
[...
Embodiment 3
[0050] This embodiment provides the method for ammonium thiocyanate-cetylpyridinium bromide-water system flotation separation of gold, compared with Example 1, the difference is that the concentration of the ammonium thiocyanate in the A solution 1.0×10 -2 mol / L, the concentration of said cetylpyridinium bromide in solution B is 2.0×10 -3 mol / L.
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