Advantages and disadvantages of carboxylic acid collectors

Oleic acid is not easy to dissolve and disperse, so solvent emulsification or heating treatment is often needed in practice. When used, the temperature is generally higher than 18 ° C. Its disadvantages are poor selectivity and hard water resistance, so the dosage should be strictly controlled. It is often added in batches with sodium carbonate and sodium silicate.

Compared with oleic acid, oxidized paraffin soap is cheap and widely used in industry. Its main disadvantage is that the flotation effect is not good when the temperature is low. When used at room temperature, emulsification is required. In the flotation of oxidized iron ore, oxidized paraffin and crude tall oil are often mixed. Crude tall oil has strong foaming power, and the mixture of them can learn from each other and make up for each other, and good results have been achieved.

There are two kinds of tall oil: crude and refined. In crude crude oil, the effective components of collecting crude oil are stable, so the flotation effect is good, but the foaming capacity is strong. When the dosage is large, the foam is too much, resulting in the difficulty of flotation operation and the decline of index. Refined tall oil is a good carboxylic acid collector with good collection performance and low temperature resistance.

Generally speaking, carboxylic acid collectors have strong collecting power but poor selectivity, so they are often used together with regulators.