Use of several floatation agents
In the process of flotation, in order to effectively distinguish useful minerals from gangue minerals or to separate various useful minerals, some agents must be added to change the physical and chemical properties of mineral surface and the nature of medium. These agents are collectively referred to as flotation agents.
Flotation reagents are used to adjust and control the flotation process. The main uses of the medicament are:
(1) the difference in mineral floatability is strengthened so that the minerals and the useful minerals and gangue are separated from each other.
(2) improve the velocity and strength of the useful mineral particles attached to the bubble.
(3) to improve the formation conditions of small and dispersed bubbles in the pulp, and to create conditions for the formation of a stable mineralized foam on the surface of the pulp.
The use and basic types of flotation reagents:
Serial number Drug type Use Drug name
One Collector The surface hydrophobicity of the Xanthate,black medicine,
mineral is enhanced and the target white medicine, fatty acid,
minerals are attached to the bubbles. amines collectors and so on.
Two Foaming agent Improve the stability of the bubble. Pine oil, cresol oil, alcohols,
Three inhibitor The hydrophilicity of minerals is Lime, cyanide, zinc sulfate,
increased and the floatability water glass, starch and so on.
of minerals is reduced.
Four Activator It promotes the collection of minerals
or eliminates the inhibitory effect. Copper sulfate, sodium sulfide, etc.
Five Regulator Adjust the pH value of the pulp. Lime, sodium sulfate, sulfuric acid, etc
The effect of disperse slime. Water glass, sodium polyphosphate and so on.
According to the workers and trade workers, flotation agents are divided into collectors, foaming agents, adjusting agents, inhibitors and so on. In general, add the adjusting agent first, then add the inhibitor, the foaming agent and the collector.
Collectors are used to collect the target minerals. Froth agents are used to produce foam layer that can float minerals. The adjuster is used to adjust the acidity and alkalinity of the pulp, activator is used to activate the target minerals and enhance its floatability. The inhibitors are used to inhibit some of the minerals that are not floating in the pulp.
The amount of addition needs to be tested, and the experienced beneficiation professionals and the good floatation workers can determine the general range of dosage.
Add places and add ways:
Regulators, inhibitors, and some collectors, such as kerosene, are added to the ball mill to create an appropriate flotation environment as early as possible. The collector and the foaming agent are added in the first agitator of flotation. If there are two agitators in the flotation process, the activator should be added in the first agitator, and the collector and the foaming agent are added in the second agitator.
The way of adding medicine is: water soluble drugs such as xanthate, Baiyao, amine black medicine, sodium silicate, sodium carbonate, copper sulfate and sodium sulfide are all added into water solution (concentration 2% - 10%).
Some insoluble drugs can be added directly to 2# oil, No. 31 black drug, oleic acid, etc. Some have to be dissolved in the solvent in advance. It is added to a water solution, such as an amine collector. Lime can be added into lime milk, added, and can also be added directly to ball milling and mixing bucket with dry powder, usually the collector, foaming agent, stirring for 1 - 2 minutes. Some chemicals need to be stirred for a long time, such as potassium dichromate used to suppress lead when the copper lead is separated.