Cupric Oxide CAS 1317-38-0 Copper(II) Oxide

Introduction of Copper Oxide Ore and Flotation Method Used
The buoyancy of copper oxide ore is generally worse than that of copper sulfide ore, and is greatly affected by conditions such as the existence of copper in the mineral and the composition of gangue, for example: copper is in the form of carbonate (Malachite, azurite) have relatively good buoyancy, and the presence of silicate (chrysocolla) has poor buoyancy, free copper oxide is easy to float, and combined copper oxide basically cannot Recovered by a single flotation method. All copper oxide minerals that exist in a separate state are called free copper oxides. All free copper oxides can be dissolved in cyanide solutions. When copper and gangue (such as iron hydroxide) are cemented together, they exist in a certain form Copper oxide minerals are called bonded copper oxides, and the types of cementation are various. They can be mechanically formed as inclusions of very finely dispersed copper minerals in gangue, or chemically formed into isomorphic substances. , It can also form an adsorption-type chromophore, and all combined copper oxides are insoluble in cyanide solutions. The percentage of bound copper in copper oxide is called the binding rate. Gangue minerals mainly composed of silicon (such as quartz) are easier to float, and those mainly composed of carbonates (such as calcite, dolomite, etc.) are more difficult. If they contain a large amount of iron hydroxide and clay Separation is more difficult when slimes are formed, especially when they are closely combined.

The flotation of oxidized minerals mostly adopts the sulfuration method
Due to the high flotation speed of the oxidized ore after sulfidation, the first 1-2 tanks of the first roughing will directly produce concentrate products. The addition method of reagents has special significance for the flotation of copper oxide ore, especially sodium sulfide, which is not only the activator of copper oxide ore, but also the inhibitor of copper sulfide ore, so it is not suitable to add enough at one time when adding. It adopts the method of multi-stage addition in batches, so the addition amount of the first operation (rough selection) in the flotation process is 70-80% of the total amount to ensure that the concentration of sodium sulfide is sufficient but not excessive. When sodium sulfide is used for vulcanization, lime is used as a pH regulator, pH 8.5-9.5, and sodium sulfide can be used to achieve better results. While using sodium sulfide, add an appropriate amount of ammonium sulfate and sodium sulfide at a ratio of 1:1. It can improve the recovery rate of copper oxide ore. The reason is that after adding ammonium sulfate, the pH value drops, which is conducive to the increase of HS- concentration, and the sulfidation reaction is accelerated, which is beneficial to the flotation of copper oxide ore. However, when selecting sulfide and oxidized mixed ore, the excessive amount of ammonium sulfate will inhibit the sulfide minerals, so the addition amount must be strictly controlled.

When mixed with hydroxamate and butyl xanthate, it has a strong collection ability for refractory minerals such as chrysocolla, copper-bearing limonite ore, etc. Sodium hydroxamate has a strong collection ability for sulfide ore at pH10~11. Good collection effect, but when the pH is lower than 8, it is unfavorable to the collection of sulfide ore.