How to choose the location and dosing method reasonably?

March 04, 2024

In order to ensure the best performance of the drug, the dosing location and dosing method should be reasonably selected according to the nature of the ore, the nature of the agent and the process requirements.

(1) Dosing location. The choice of dosing location is related to the use and nature of the agent. Usually it is first added with a pH adjuster, which can be added to the ball mill . On the one hand, the inhibitor and the collector can play a role in the pulp of suitable pH . It can eliminate some " inevitable ions " that are harmful to flotation . The inhibitor should be added to the collector and usually also added to the ball mill to allow the inhibitor to interact early with the fresh surface produced by the inhibited mineral. The activator is often added to the agitation tank where it is stirred with the slurry for a period of time to promote action with the activated mineral. Collector and frother to a stirred tank or a flotation machine, and poorly soluble collectors (e.g. cresol black powder, baiyao, coal oil) was added fairly frequently grinding machine, which is in order to encourage Dispersion, growth and the duration of action of minerals.

The usual dosing sequence depends on the situation, 1 when flotation of raw ore: pH regulator - inhibitor - collector - foaming agent. 2 When the flotation is suppressed mineral: activator - collector - foaming agent.

(2) Dosing method. There are two ways to add drugs, one is to add one time, and the other is to add in batches. One-time addition is to concentrate the drug once and add it before the rough selection. The concentration of the drug thus added is high and it is convenient to add. Generally, for drugs that are easily soluble in water, are not taken away by the foam, and are not easily reacted in the slurry and are ineffective, a one-time dosing such as lime or soda is often used. The batch dosing is added in several batches along the thick, fine, and sweeping lines. Generally, 60% to 70% of the total amount is added before the flotation , and the remaining batches are added to appropriate places. In the following cases, it should be added in batches: 1 agents that are easily oxidized, easily decomposed, and easily reacted and deteriorated, such as xanthate, sulfur dioxide gas, etc.; 2 agents that are difficult to dissolve in water and are easily taken away by foam, such as oleic acid, Fatty amine collection

3 ; the amount of strict requirements of the agent, such as sodium sulfide. If the local amount is excessive, it will be counterproductive.

According to the above principles, the flotation plant designed the dosing location and the dosage of the drug, which are not allowed to be easily changed during the production operation. But when the long line field flotation, flotation machine if hit "run tank", "sunken groove" concentrate quality deterioration or metal poured into the emergency tailings, allowing appropriate under the circumstances Temporarily add some medicines at the location to reduce losses as quickly as possible. However, it is necessary to analyze the causes of abnormality in time and adjust as soon as possible so that the production situation can be transferred to normal.

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Author:

Mr. Bruce Tang

E-mail:

bruce.tang@macxipump.com

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