Introduction to the usage method of Jinwang Environmental Protection Gold Extract
Jinwang environmentally friendly gold extractant is an innovative product that can completely replace highly toxic sodium cyanide. It has the characteristics of low toxicity, environmental protection, stable performance, strong applicability, high leaching rate, faster recovery, easy use, and convenient transportation.
Product usage method: Environmentally friendly gold extractants are used in the heap leaching, pool leaching, and carbon slurry processes of gold and silver oxide ores, primary ores, sulfide ores, cyanide tailings, and gold concentrates. The process flow is the same as that of using sodium cyanide. The lean solution can be reused in production, and activated carbon adsorption is the best for extracting gold from precious liquids. The leaching effect of gold is best when the ambient temperature is above 10 ℃. Compatible with cyanide extraction method.
1. Alkalinity adjustment: The product belongs to alkaline inorganic compounds, and lime, caustic soda, etc. are used as stabilizers for this product. The pH value of the ore heap (slurry) is 11 ± 1. After the raw ore is piled up or fed into the pool, the alkalinity and pH value of the effluent are adjusted to 11 ± 1.
2. Dosage: The dosage is approximately 3.0-10.0 parts per ten thousand (300-1000 grams per ton of ore), and factors such as ore properties, grade, and acidity/alkalinity affect the dosage.
3. Dosing method: After fully dissolving in alkaline water at room temperature, it can be used. Before the first dosing, adjust the alkalinity to at least 10.
Early stage: Control the concentration of the medicine at around 1-1.5 ‰ for 10-15 days.
Mid term: Control the concentration of the medicine at around 0.5-1.0 ‰ for 10-15 days.
Later stage: Control the concentration of the medicine to below 0.3 ‰ for 5-10 days.
4. Calculate drug dispensing:
① The dosage can refer to the usage of sodium cyanide, and it is recommended to conduct leaching tests and refer to its optimal conditions (usually about 1-2g/t of oxidized ore, the concentration of the solution is generally maintained at 0.3-1.5 ‰, adjusted appropriately according to different ore grades and harmful components);
② The calculation method for dosage: dosage=(required concentration value of the medicine - remaining concentration value of the medicine) x water volume of the dosing pool; Assuming the required concentration value of the liquid medicine is 1.2 ‰ (based on water volume), the remaining mass concentration of the liquid medicine in the return water is 0.6 ‰, and there is 500 cubic meters of water in the lean solution tank, the amount of replenishment is (1.2-0.6) × 500=300 kilograms.
5. Drug concentration: Add the gold extract according to the calculated ratio. The concentration of the medicine can be detected by the following method.
2、 Method for detecting drug concentration
（1） Instruments and reagents required for testing
1. One 250ml conical flask; 2. 1 10ml large abdominal pipette;
3. 1 acid burette; 4. 1 rubber dropper;
5. Test agent (preparation method: add 1.7331 grams of silver nitrate and distilled water to a volume of 1000 milliliters in a brown volumetric flask, store in a cool and dark place);
6. Chromogenic reagent (preparation method: 0.02-0.05 grams of p-dimethylaminobenzene-2-rhodanine (C12H12N2OS2, also known as rose red silver reagent or test silver spirit) is added to 100 milliliters of acetone and stored in a brown reagent bottle away from light).
（2） Testing methods
1. Extract 10ml of the test solution using a 10ml pipette and place it in a conical flask;
2. Take 2-5 drops (about 0.1ml) of color developer from a dropper and add them to a conical flask. The liquid color will turn light yellow;
3. Slowly drip the test agent into a conical flask using an acid titration tube (shake the flask while dripping, observe the color change, and pay attention to titrating under natural light);
4. The endpoint of titration is when the liquid color changes from light yellow to light red.
5. The number of milliliters of testing agent consumed is the concentration of the detection solution in ten thousand parts (titration concentration of the solution). If 0.7ml is consumed, the concentration will be 0.07 ‰ (i.e. 0.07 ‰); If 1.0ml is consumed, the concentration will be one ten thousandth (i.e. 0.1 ‰); and so on.
others
1. Avoid contact with acidic chemicals and dissolve the gold extractant in alkaline water.
2. It is recommended to regularly check the grade, pH value, and concentration of the precious liquid;
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