After the use of mineral processing activator: In the flotation process, the effect of increasing the flotability of minerals is called activation. The agent used to change the composition of the mineral surface and promote the interaction between the collector and the mineral surface is called activator.
Activation can be roughly divided into: 1. Spontaneous activation; 2. Preactivation; 3. Resurrection; 4. Vulcanization.
1. Spontaneous activation
When processing non-ferrous polymetallic ores, the mineral surface will spontaneously react with some soluble salt ions during the grinding process. For example, when sphalerite and copper sulfide minerals coexist, a small amount of copper sulfide minerals will always be oxidized into copper sulfate after the ore is mined. The Cu2+ ions in the slurry react with the sphalerite surface to activate it, making it difficult to separate copper and zinc. It is necessary to add some adjusting agents such as lime or sodium carbonate to precipitate, as well as some “inevitable ions” that may cause activation.
Second, preactivation
To select a mineral, add an activator to activate it. When pyrite is severely oxidized, sulfuric acid is added to dissolve the oxide film on the surface of the pyrite before flotation, exposing the fresh surface, which is beneficial to flotation.
three.recover
It refers to minerals that have been inhibited before, such as sphalerite that has been inhibited by cyanide, and can be resurrected by adding copper sulfate.
Four.vulcanization
It refers to first treating the metal oxide ore with sodium sulfide to form a layer of metal sulfur mineral film on the surface of the oxide ore, and then flotation with xanthate.
Mineral processing reagents used as activators are:
Sulfuric acid, sulfurous acid, sodium sulfide, copper sulfate, oxalic acid, lime, sulfur dioxide, lead nitrate, sodium carbonate, sodium hydroxide, lead salt, barium salt, etc.
Post time: Dec-25-2023
