tel
+86-21-6420 0566
How to use flotation reagents correctly is the problem of how to correctly determine the reagent system before flotation. The reagent system refers to the type of reagents added during the flotation process, the amount of reagents, the method of addition, the location of the reagents and the order of the reagents. The reagent system of the flotation plant is related to the nature of the ore, the process flow, and the number of mineral processing products required. It is usually determined through the ore selectivity test or semi-industrial test. The reagent system is an important factor affecting the technical and economic indicators of mineral processing.
The types of reagents used in the flotation plant are related to the nature of the ore, the process flow, and the number of mineral processing products required. It is usually determined through the ore selectivity test or semi-industrial test.
According to the function of the reagents, the types of reagents can be roughly divided into three categories.
(1) Frothing agent: an organic surfactant distributed on the water-gas interface. It is used to produce a foam layer that can float minerals. Frothing agents include pine oil, cresol oil, alcohols, etc.
(2) Collector: Its function is to capture the target mineral. The collector can change the hydrophobicity of the mineral surface and make the floating mineral particles adhere to the bubbles. According to the properties of the agent, it is divided into non-polar collectors, anionic collectors, and cationic collectors. Commonly used collectors include black medicine, yellow medicine, white medicine, fatty acids, fatty amines, mineral oils, etc.
(3) Regulator: Regulators include activators and inhibitors, which change the properties of the mineral particle surface and affect the interaction between the mineral and the collector. Regulators are also used to change the chemical or electrochemical properties of the water medium, for example, to change the pH value and the state of the collector therein.
① pH adjusters: lime, sodium carbonate, sulfuric acid, sulfur dioxide;
② Activators: copper sulfate, sodium sulfide;
③ Inhibitors: lime, yellow blood salt, sodium sulfide, sulfur dioxide, sodium cyanide, zinc sulfate, potassium dichromate, water glass, tannin, soluble colloid, starch, synthetic polymers, etc.; ④ Others: wetting agents, flotation agents, solubilizers, etc.
During flotation, the dosage of reagents should be just right. Insufficient or excessive dosage will affect the mineral processing indicators, and excessive dosage will increase the mineral processing cost.
The relationship between the dosage of various reagents and flotation indicators
Insufficient dosage of collector, insufficient hydrophobicity of minerals, resulting in a decrease in recovery rate, excessive dosage will reduce the quality of concentrate and bring difficulties to separation flotation;
Insufficient dosage of frother, poor foam stability, excessive dosage, "running" phenomenon;
Too small dosage of activator, poor activation, excessive dosage will destroy the selectivity of the flotation process;
Insufficient dosage of inhibitor, low grade of concentrate, excessive dosage of reagent will inhibit the minerals that should float out, resulting in a decrease in recovery rate.
