How is the flotation agent formulated?

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.

brief introduction
The cyclone was used in 1885 and has developed into many forms. According to the way of air entry, it can be divided into two categories: tangential entry and axial entry. Under the same pressure loss, the latter can handle about 3 times the gas and the air distribution is even.
The Cyclone Dust Collector is composed of an intake pipe, an exhaust pipe, a cylinder body, a cone and a ash hopper. The cyclone Dust Collector is simple in structure, easy to manufacture, install and maintain management. The investment and operation cost of the equipment are low. It has been widely used to separate solid and liquid particles from the air or separate solid particles from the liquid. Under normal operating conditions, the centrifugal force acting on particles is 5~2500 times that of gravity, so the efficiency of cyclone separator is significantly higher than that of gravity settling chamber. Based on this principle, a cyclone dust removal device with a dust removal efficiency of more than ninety percent has been successfully developed. In the mechanical dust remover, the cyclone dust collector is the most efficient one. It is suitable for the removal of non - adhesive and non - fibrous dust. Most of them are used to remove particles above 5 m. The parallel multi tube cyclone device also has 80 to 85% dust removal efficiency for 3 - M particles. The cyclone duster constructed with special metal or ceramic materials with high temperature resistance, abrasion resistance and corrosion can operate at a temperature of 1000 degrees C and pressure of 500 x 105Pa. In terms of technology and economy, the control range of pressure loss for cyclone dust collector is generally 500 to 2000Pa. Therefore, it belongs to the medium effect dust collector, and can be used for the purification of high temperature flue gas. It is a kind of widely used dust remover, and it should be used in the dust removal of boiler flue gas, multistage dust removal and predusting. Its main drawback is the low removal efficiency of fine particles (<5, m).

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