How many grams of gold can be extracted from a ton of first-class gold ore?

A ton of first-class gold ore can extract about 5 grams of gold. A ton of ordinary gold ore is about 5 grams of gold.

Gold ore refers to the ore containing gold element or gold compound, which can be processed into gold concentrate or gold ore with high gold grade, and the gold concentrate needs to be smelted into refined gold and gold products. Gold ore refers to gold-bearing ore mined from gold mine manually or mechanically, which also contains other metal impurities. Because most minerals look illegible, similar to ordinary stones. The gold content in the ore is extremely low. In order to extract gold, it is necessary to crush and grind the ore, and enrich it in advance or separate gold from the ore through mineral processing. Gravity separation and flotation are widely used in gold mineral processing. Gravity separation plays a very important role in placer gold production. Flotation is a widely used mineral processing method in rock gold mines. About 80% of rock gold mines in China use this method to select gold, and the level of mineral processing technology and equipment has been greatly improved.

Six gold ore refining methods

1. Single flotation is suitable for treating coarse-grained and medium-grained natural gold and iron ore. The crushed ore enters a ball mill, grinds into pulp and then enters flotation. In flotation, sodium carbonate is used as regulator to make gold flotation. At the same time, using butyl xanthate and amine black powder as recovery agents, gold ore powder is separated from slag to produce gold concentrate powder.

2. Mixed mercury flotation is suitable for treating natural gold with coarse disseminated particle size and occurring in pyrite and other sulfide ores. Different from single flotation, the recovery rate of gold can reach 30-45% by adding mercury plate after grinding. The pulp mixed with mercury is floated by the overflow of the classifier. In order to produce mercury and gold better, the recovery rate of mercury and gold can be increased to 70% by adding a certain concentration of sodium carbonate and caustic soda during grinding.

3. Gravity beneficiation system uses the proportion difference between gold and other minerals for flotation. The greater the difference in specific gravity, the easier it is to separate. The gold-bearing sand is placed in a cylindrical screen, the ore flows through high-pressure water, and the gravel sand larger than the screen hole is transported to the tailings pond through a chute and a belt; The ore smaller than the sieve hole is fed into the 1-3 level circular jig through the male distributor, and the concentrate flows into the shaking table through the three-level jig, and the fine sand ore is produced through roughing, cleaning and scavenging. This method is mostly used for quicksand ore and fine ore.

4. Carbon slurry gold extraction process is the most advanced gold extraction method in the world in 1980s. It is used to treat gold-bearing limonite oxide ore, and the separation effect is good. Carbon slurry method is to adsorb activated carbon while oxidizing leaching and improve the leaching rate of gold. The process includes: two-stage closed-circuit crushing and two-stage grinding, 95% of the product overflowed from the dragging device is -200 mesh, then it enters a thickener to concentrate the pulp concentration from 18-20% to about 42-45%, and then it enters a leaching adsorption tank through a buffer tank for leaching operation, and at the same time, it is adsorbed by activated carbon made of coconut shells to obtain the final product, gold-loaded carbon.

5. Smelting produces gold concentrate powder by various mineral processing methods, adding KNO3 oxidant, silver and borax.

Six, electrolytic direct smelting Tongguan gold mine by this method, using steel velvet as cathode direct smelting to obtain gold and silver alloy gold.