What is the effect of copper molybdenum separation inhibitor?

Copper molybdenum concentrate enters copper molybdenum separation operation after pretreatment, and copper molybdenum separator is commonly used in copper molybdenum separation process. Copper molybdenum separation process can be divided into: first, oxidation method, which is applicable to the separation of copper molybdenum mixed concentrate with chalcocite as sulfide mineral; The second is the reduction method, which is applicable to the separation of copper and molybdenum in chalcopyrite. Sometimes, a small amount of qing compound is added in the beneficiation operation to strengthen the effect. Common copper molybdenum separation methods are as follows:
1) Preferential flotation process of copper molybdenum ore
Copper molybdenum separator is generally used in the preferential flotation process of copper molybdenum ore, and the key is copper mineral. The key of copper molybdenum floatation process is to desorb the hydrophobic material of collector on the surface of copper mineral, so that it can change from hydrophobic to hydrophilic, thus maintaining hydrophilic in the copper molybdenum separation process. Copper sulfide is one of the minerals with good floatability when xanthate is used as collector, which requires a large amount of copper molybdenum separator. The research shows that there are dozens of chemical substances that can sulfide copper ores, but few of them have industrial application prospects or have been used in industry. It can be divided into the following two categories.
Inorganic. Such as sodium sulfide, Knox and qing compounds. The three reagents are used alone or in combination to form a conventional reagent for the separation of copper molybdenum mixed concentrate without copper floating molybdenum.
organic compound. Such as acetic acid and yi mercaptan. After the effective copper mineral, a small amount of non-polar oil is usually added to flotation of molybdenum to strengthen the flotation of molybdenite. In addition, in order to improve the grade of molybdenum concentrate, it is necessary to add some regulators, such as sodium silicate, sodium hexametaphosphate, etc. Gangue mineral, dispersed pulp. High quality molybdenum concentrate can be obtained only after multiple cleaning (6~14 yuan/time).
2) Nitrogen floatation
For a long time, most molybdenum copper concentrators have widely used qing compounds, sulfides and Knox copper molybdenum separating agent to float molybdenum from copper, thus realizing copper molybdenum separation. At present, as people pay more and more attention to environmental protection, the highly toxic qing chemicals and nox agents have been gradually eliminated. Therefore, sodium sulfide or sodium sulfide and other sulfides are generally used as copper ore agents in production. However, sodium sulfide itself has strong reducibility and is easy to be oxidized by dissolved oxygen or other oxidizing substances in flotation pulp, so the dosage of reagent is large. Nitrogen filling flotation process can reduce the dosage of reagents.
3) Pulsating high gradient magnetic separation
Pulsating magnetic separation is an effective method for separating fine weakly magnetic minerals developed in the early 1980s. It has been widely used in the separation of weakly magnetic iron ore, manganese ore, wolframite and other useful minerals.
4) Passivation process
Passivation refers to the oxidation and hydrophobic surface of copper minerals in copper molybdenum mixed concentrate; The xanthate on the surface of copper mineral and in the pulp is decomposed and oxidized. Chalcopyrite is prone to failure under the conditions of low pH, high temperature and long time.