The main advantages of the thiourea method are: 1) Non-toxic, no neutralization process is required before gold leaching, and cyanide is highly toxic, and a large amount of lime is added for pretreatment before cyanidation. 2) The thiourea regeneration and purification process is simple. 3) The dissolution rate of gold and silver is fast, generally 8 to 10 times faster than the cyanidation method, especially the dissolution of silver, which is far better than the cyanidation method. In the presence of SO 2 , the leaching rate of thiourea It is roughly the same as the cyanidation method. 4) Some impurities in raw materials, such as copper , arsenic , antimony, etc., are not as sensitive as cyanidation. The thiourea method is the most promising treatment for ore that is not suitable for cyanide leaching, especially those complex refractory ore and silver-bearing ore that have been pretreated by bacterial leaching or pressure leaching. However, the thiourea method has the following two disadvantages: one is that thiourea is easily oxidized, resulting in excessive consumption of thiourea, and the other is that thiourea is relatively expensive, and economically it is still competitive with cyanidation. Recent studies have shown that the introduction of SO 2 while controlling the pH of the medium can inhibit the oxidative decomposition of thiourea, reduce the consumption of thiourea to about 1/5, and treat some acidic gold ore with modified thiourea. It is cheaper than using cyanidation. 1. The equipment occupies a small space, flexible and convenient installation, and simple operation;
5. This equipment adopts the hydraulic pressing method, which has high pressure, fast speed, intelligent control, and removes the moisture in the material.
Scope of application: Hemp Juice Press Machine,Juice Presser Machine,Apricot Juice Pressing Machine,Plum Juice Press Machine,Fruit Juice Manufacturing Machine Henan Gems Machinery Co.,Ltd , https://www.gemsmachines.com
2. The press barrel and frame are made of high-quality SUS304 stainless steel for food machines, which conforms to the national food industry standards;
3. Its working pressure, pressing speed, pressure holding range, pressing time, pressing stroke, etc. can be adjusted;
4. Double-barrel interchangeable press, the pressing and cloth, pressing and slag processes can be carried out at the same time, which improves production efficiency and saves labor;
It is suitable for pressing and filtering, pressing and squeezing, solid-liquid separation, slag juice separation, dehydration and squeezing in the processing industries such as fruit and vegetable juice, fermented fruit wine, rice wine, rice wine, grain wine, enzymes, traditional Chinese medicine residues, pickled pickles, vegetables, etc. , the effect is different due to different materials.