Method for Adsorbing Gold by Coconut Shell and Apricot Shell Activated Carbon

Stacking method

Firstly, the ore is crushed to a certain Particle size, and then stacked in a leaching equipment, and repeatedly washed with a certain degree of NaCN solution from top to bottom until the gold content in the eluent reaches a certain concentration _L. The gold-containing cyanide solution is successively passed through a set of adsorption columns packed with Activated Carbon. The cyanide complex is adsorbed on the large surface of the pores inside the char.

2. Carbon slurry method

The gold-bearing ore is pulverized to a fineness of 300 mesh right and left. Add water to stir evenly to suspend the slurry. A solution of potassium cyanide (or sodium cyanide) is added to the slurry to form a water-soluble cyanide complex [Au(CN):]. The slurry containing the cyanide gold complex is sufficiently contacted with the Granular Activated Carbon under stirring in the Adsorption tank in series. Most of the cyanide complex is adsorbed onto the inner surface of the Activated Carbon. The slurry tail containing only a small amount of cyanide compound is separated from the activated carbon and discharged. There are two ways to recover gold from gold-loaded Charcoal. One of the most primitive and uneconomical methods is to send gold-loaded charcoal to a smelter for roasting and high-temperature smelting to obtain gold. The other is a more commonly used method of desorbing the cyanide complex on the gold-loaded charcoal with a mixture of 1% to 1.0% hot NaCN and NaOH, and then electrolyzing to obtain pure gold. Activated carbon has a reduced activity after multiple adsorption and desorption, and must be regenerated.

3. Coconut Shell Gold Activated Carbon

It is made of high quality Coconut Shell and is refined by physical method and high temperature steam activation process. The gold activated carbon has uniform particle size, high mechanical strength, strong adsorption force, and is manufactured by special processes such as water milling. It has the characteristics of good wear resistance and high adsorption performance. It is suitable for modern gold mining and gold production, mainly used for heap. Separation and extraction of precious metals from the gold metallurgical industry by dip or carbon slurry.

Activated Carbon is a porous carbonaceous material. It has a highly developed pore structure and is an excellent Adsorbent. The Adsorption area per gram of activated carbon is equivalent to that of eight tennis balls. The adsorption is borrowed. It is achieved by physical adsorption force and chemical adsorption force. Its constituent materials contain a small amount of hydrogen, nitrogen, oxygen and ash in addition to carbon, and its structure is formed by carbon-forming hexacyclic materials. Due to the irregular arrangement of the six-ring carbon, the characteristics of the microporous volume and high surface area of the activated carbon are caused.