The process shown in the figure below is a leaching, four-stage countercurrent wash. Are located W1, W2, W3, W4 of the washer liquid containing four gold (g / m 3). In the process, the concentration of the leaching operation is 33.33% , the discharge concentration of the washing thickener is 50% , and after dilution to 20%, it is fed to the next-stage washing thickener. The new water added to the process does not contain gold. The figure in the figure is the amount of liquid ( m3 ) for processing 1 ton of ore .

1. Find the washing efficiency of each level

According to known conditions, L = 2 , R = 1 , K = 0 , F = 4 . The second, third, fourth and fifth countercurrent washing efficiencies are:

2. If the cyanide ore contains gold 52 grams / ton, the gold leaching rate is 96.15% , seeking the precious liquid and liquid gold grade in the countercurrent washing process at all levels.

Take a three-stage countercurrent washing operation as an example:

Entered gold that has been washed: 52 × 96.15% = 50 ( g / ton )

Loss of dissolved gold in drain: 5 0 × ( 1-E 3 ) =0.945 ( g / ton )

By countercurrent washing tailings discharge concentration of 50%, the discharge of liquid gold 0.945% g / m 3.

Handling 1 ton of raw ore output 4 meters 3 , including gold:

      50-0.945 = 49.055 (g / m3)

Therefore, the gold content of your liquid is:

   49.055 ÷ 4 = 12.264 (g / m3)

The same can be used to find the gold grade and the amount of gold in the precious liquids and drains:

Washing series                                       two               three               four

Gold grade of precious liquid (g / m 3 )          11.765            12.264           12.423

Discharge gold grade (g / m 3 )           2.94                          0.945            0.31

Gold content of precious liquid (g)              47.06                        49.055           49.69

Drainage gold content (g)                  2.94                           0.945                    0.31

3. Cyanide ore containing gold 6.5 grams / ton, solution gold in the leaching tank 6 grams / ton, the washing thickener no longer dissolves gold, the poor liquid contains gold 0.02 g / m 3 , seeking to wash the thickener liquid gold grade.

According to the balance of liquid gold content entering each thickener, the following relationships can be listed:

               Enter liquid gold   Discharge liquid containing gold

First-stage washing thickener    2 × 3+4w 2     = ( 5+1 ) w 1

Secondary washing thickener    w 1 +4 w 3       = ( 4+1 ) w 2

Three-stage washing thickener    w 2 +4 w 3       = ( 4+1 ) w 3

Four-stage washing thickener    w 3   + 4 × 0.02   = ( 4+1 ) w 4

Solve the above equation:

   w 1 = 1.31435 grams / M 3

   w 2 = 0.47129 g / M 3

   w 3 = 0.12745 grams / M 3

   w 4 = 0.04149 grams / M 3

High Temp Roof-mounted Cabinet Air Conditioner

Taizhou Tentcool Electrical Appliance Co., Ltd. , https://www.tentcool.com

November 14, 2019