Beneficiation Experimental Study of a Carlin-type Gold Deposit in Guizhou

The beneficiation experimental study of a Carlin-type gold deposit in Guizhou includes a series of laboratory and pilot-scale tests to determine the optimal beneficiation process and parameters for maximizing gold recovery and minimizing environmental impact. Here are some common experimental studies and their results:

1. Mineralogical Analysis: Identification and quantitative analysis of mineral compositions and associations using X-ray diffraction (XRD) and scanning electron microscopy (SEM) to guide the selection of beneficiation methods. Results showed that the main minerals were quartz, calcite, dolomite, pyrite, arsenopyrite, and gold.

2. Gravity Separation Test: Evaluation of the gravity separation performance of different equipment such as shaking table, spiral chute, and Knelson centrifugal concentrator. Results showed that the Knelson concentrator had the highest gold recovery rate of up to 95.26% with a concentrate grade of 187.56 g/t.

3. Flotation Test: Evaluation of the flotation performance of various collectors and frothers to improve gold recovery. Results showed that a combination of butyl xanthate and terpenic oil had the best flotation performance with a gold recovery rate of 93.48% and a concentrate grade of 137.34 g/t.

4. Cyanide Leaching Test: Evaluation of the cyanide leaching behavior of the flotation concentrates and tailings to optimize the leaching conditions and minimize the cyanide consumption. Results showed that under the optimal leaching conditions, the cyanide leaching rate of the flotation concentrates was 96.19% with a gold recovery rate of 94.53% and a final residue grade of 0.13 g/t.

Here is a general table of the main results of the experimental studies:

| Study | Method | Result |

|-------|--------|--------|

| Mineralogical Analysis | XRD, SEM | Quartz, calcite, dolomite, pyrite, arsenopyrite, and gold were the main minerals. |

| Gravity Separation Test | Knelson Concentrator | Gold recovery rate of up to 95.26% with a concentrate grade of 187.56 g/t. |

| Flotation Test | Butyl Xanthate + Terpenic Oil | Gold recovery rate of 93.48% with a concentrate grade of 137.34 g/t. |

| Cyanide Leaching Test | Optimal Leaching Conditions | Cyanide leaching rate of 96.19% with a gold recovery rate of 94.53% and a final residue grade of 0.13 g/t. |

Note:

1. The specific experimental procedures and conditions presented in this table are only for reference and may vary depending on the specific characteristics of the deposit.

2. The results of beneficiation experimental study may vary depending on the sample size, quality, and other factors.