Hydrochloric acid is consumed in many mining operations for ore treatment, extraction, separation, purification and water treatment. Significant quantities are used in the recovery of molybdenum and gold. Hydrochloric acid is used to convert high-grade scheelite concentrate (CaWO4) and crude sodium tungstate to tungstic acid, which in turn, can be used to produce tungsten metal and chemicals. Hydrochloric acid is also used in uranium and zirconium processing, solution mining of borate ores, as a pH regulator in the froth flotation of potash ores, and in rare earth extraction from bastnasite.
| ITEMS | SPECIFICATION | TEST METHOD |
|---|---|---|
| Hydrochloric Acid (HCl) | 34.2 ~ 36.3 wt% | FTTC 2440 |
| Color | 20 APHA Max | FTTC 2605 |
| Iron (Fe) | 3 mg/L Max | FTTC 2419 |
| Specific Gravity | 1.16 ~ 1.18 @ 60F | FTTC 2609 |
| NVR | 100 wt ppm Max | FCC V |
| Oxidizers as Cl2 | 30 wt ppm Max | FCC V |
| Reducing Substances as SO3 | 70 wt ppm Max | FCC V |
| Heavy Metals, as Pb | 1 mg/L Max | FTTC 2419 |
| Sulfate | 20 mg/L Max | FTTC 2419 |
| Volatile Organic Compounds | 5 mg/L Max | FTTC 4506A |
