Cyanide operation time and its condition control

The so-called cyanide operation time refers to the time required for the operation of processing an appropriate amount of a batch of raw materials. Cyanide leaching was stirred job comprises dissolving the above slurry was stirred for 4h most of the gold, the gold telluride 72h complete decomposition of the ore. Leaching leaching can take up to 5 days or longer.

In fact, the allowable cyanide time is only to maximize the extraction rate of gold, and it is impossible to extract all the gold in the raw materials. This is because:

1. In terms of dissolution rate, the leaching efficiency of gold is very low when the leaching process is near the end point. In the end, the cost of extracting 1% of gold may be higher than the actual value of recycled metals.

Second, in terms of time, if the final leaching time of reducing the batch of raw materials is used to treat another batch of raw materials, the total amount of raw materials can be increased in the same time, so that the production of metal can be increased by an adult.

The following factors also indicate the need to reduce the final leaching time and final gold extraction rate for cyanidation operations.

1. During the whole cyanide decomposition, the surface area of ​​the gold particles is continuously reduced, the coarse particles are thinned, and the fine particles are completely dissolved, so that the gold content in the ore is getting lower and lower. Therefore, the cyanidation operation can first dissolve 60% to 70% of the gold in the ore, and then the slurry is sent to the cyanide grinding process for grinding.

Second, as the dissolution continues, the solution can diffuse into the gold deep in the crack, but the dissolution rate of the gold particles in the crack is rather slow, because the stirring can only play a role in slowly conducting the medium. At this time, increasing the stirring strength does not accelerate the dissolution process of gold in the crack.

Third, although in practice the gold concentration does not increase to the extent that hinders the dissolution of gold, the cyanidation time is long, and the increase in the concentration of gold in the solution affects the progress of the dissolution reaction.

Fourth, containing entrained iron, iron sulfide sulfur and ball mill liner, stibnite iron ball wear like iron, for a long time will generate a mineral surface of the gold cyanide-insoluble film, impede or affect gold Dissolved.

Nickel Base Corrosion Resistant Alloy

Nickel-based corrosion-resistant alloys generally refer to nickel-based metal materials with strong corrosion resistance. The corrosion-resistant alloys produced by Seonjip are mainly used in the fields of petrochemical, energy, marine and so on.