Introduction of flotation and dosing system and water glass

The type and quantity of the drug added during the flotation process, the dosing location and the dosing method are collectively referred to as the pharmaceutical system. The pharmaceutical system is an important process factor in the flotation process and has a significant impact on the technical and economic indicators of flotation.

1. The type of drug used in the flotation plant is related to the ore properties, process flow, product plan and other factors. It is determined in the ore selectivity test and verified by industrial tests.

Increasing the amount of collector and foaming agent within a certain limit can increase the flotation rate and improve the flotation recovery rate and concentrate quality, but the excessive amount reduces the flotation index. Similarly, the amount of inhibitors and activators should be appropriate, and both excess and deficiency will reduce the flotation index.

The effect of mixed medications tends to be better than that of single agents, especially when mixed with collectors. This is due to the use of a mixed collector, the speed of the chemical layer adsorbed by the mineral surface is relatively fast, and the rate of attachment of the ore particles to the bubbles is accelerated. In addition, the synergistic effects of the agents also play a role. The proportion of the drug mixture should be determined by experimentation.

2. Insufficient or excessive dosage of the agent will affect the beneficiation index. If the dosage is too large, the production cost will also increase. The amount of flotation agent should be just right.

3. Formulation concentration The flotation plant generally dilutes the agent into a liquid for easy addition. For a drug that is easily soluble in water and used in a large amount, it can be formulated into a large concentration, and can generally be formulated to a concentration of 10 to 20%. However, when the dosage is small or the water solubility is poor, the concentration of the preparation may be lower, and the concentration is usually 1 to 5%. The agent which is hardly soluble in water can be dissolved by means of an organic solvent and then formulated into a low concentration solution.

4. Dosing place and dosing order For the insoluble agent, in order to make it have a sufficient action time, it is usually added to the grinder. The flotation agents in different role, should also be added different location, such as copper sulfate, xanthate, oil II three agents, dosing sequence is: copper sulfate was added to the first mixing vessel center, yellow The drug is added to the center of the second agitating tank, and the second oil is added to the outlet of the second agitating barrel. Also pay attention to create conditions for the later added agents to play a better role. For example, when flotation, the pulp pH adjuster should be added first, and the pH value of the slurry should be adjusted to an appropriate value to more effectively exert inhibitors and capture. Agent action.

The general dosing sequence of the flotation plant is: flotation of the ore is: pH adjuster → inhibitor or activator → collector → foaming agent; for the inhibited mineral: activator → collector →Foaming agent.

5. Dosing method Dosing method generally has two types: concentrated addition and segmental addition. In general, for chemicals that are easily soluble in water, are not easily added by foam, and are not easily ineffective, they can be added in a concentrated manner, that is, the agent is added before rough selection. Conversely, for those agents that are easily removed by the foam and that are easily broken by the action of fine mud and soluble salts, they should be added in stages.

In order to improve the efficacy of the drug and save the amount of the drug, in recent years, many experiments have been carried out on the efficacy of the intensive agent at home and abroad. Such as emulsification, heating flotation, aerosol method, electric and magnetic field treatment, irradiation with ultraviolet light, use of high-energy radiation to strengthen, and some have been used in industrial practice, and some are still under study.

Important inhibitor - water glass