In the absence of obvious harmful elements, the suitable pH range is typically between 9 and 11. Excessively high pH values are detrimental and can affect the leaching rate. pH strips or small instruments are suitable for testing pH levels.

For ores with good oxidation, they can be directly stacked, while hard ores are generally below 3 centimeters in diameter.

Oxidized ores or relatively soft limonite, except for quartz vein sulfide ores, basically all gold-bearing minerals can be heap leached. For gold ores with good oxidation, they can be directly stacked for heap leaching. For slightly harder ores, they need to be crushed before heap leaching.