How is the flotation agent formulated?
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The flotation agent is properly formulated before use, which plays an important role in improving the efficacy. The preparation method is mainly determined according to the nature of the medicament, and the following methods are commonly used:

(1) Formulated into an aqueous solution. Most water-soluble agents are used in this way, usually in 5% to 10% or more dilute aqueous solutions. The solution should not be too thin, too thin and too large, but it should not be too concentrated. The concentration is too large. It is difficult to control the dosage correctly and it is not convenient to transport.

(2) Solvent preparation. Some agents that are insoluble or poorly soluble in water can be dissolved in a special solvent and then added. For example, the oleic acid dissolved in kerosene and then added, can enhance disseminated in the pulp, but also to strengthen the role of collector oleic acid. The white medicine can be dissolved in o-toluidine and used.

(3) Emulsification method. Fatty acids and diesel collector after emulsification, which may increase the degree of dispersion in the pulp and improve efficiency. Commonly used emulsification methods are: strong mechanical agitation, steaming or ultrasonication, if the emulsifier is added, the effect is better.

For example, tall oil and diesel can be added with emulsifier in water - alkyl aryl sulfonate, many surface active substances can be used as an emulsifier.

(4) Saponification. Fatty acids formulated collector often this method, such as iron ore flotation, oxidized paraffin often used with tall oil soap as collector. In order to improve the water solubility, about 10% sodium carbonate can be added, and the tall oil is saponified, and added with hot water to form a hot soap liquid. Another example is oleic acid, which has poor water solubility, but after reacting with sodium carbonate to form sodium oleate, the water solubility is improved.

(5) Formulated as a suspension or emulsion. For example, lime can be added with water to grind into lime milk.

(6) Acidification. When a cationic collector ( amine ) is used, it is necessary to add hydrochloric acid or acetic acid to form an amine salt because of poor water solubility, and it can be dissolved in water.

(7) Add the stock solution. Some of the agents have little solubility in water, and it is difficult to formulate a true solution or a stable emulsion, such as pine oil, cresol black, kerosene, etc., without having to prepare a solution, but directly adding the stock solution according to the amount.

For the preparation method of the water-soluble medicament, the medicament is generally dissolved in a solvent with a small amount of water, and after being dissolved, the water is gradually added to a desired concentration.

At the production site, for the convenience of preparation, a scale with a marked volume can be engraved on the dispensing tank, and a known dose of the medicament can be placed in the tank, and water is added to the position indicated by the scale to the concentration, and the mixture is stirred until completely. Dissolve and ready to use.

Whether the concentration of the drug reaches the standard can be measured by a densitometer.

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