What to do if the flotation effect is not good?

 In the flotation process, there are many processes that affect the flotation effect. There are not only non-adjustable factors of ore properties, but also adjustable factors such as pulp concentration, pulp temperature, pH, flotation time, grinding fineness, and reagents. Let's introduce them one by one below.

Ore properties refer to the chemical composition, mineral composition, structure, structure and element occurrence state of the ore. The oxidation degree of the ore has a great influence on the flotation effect, because oxidation will change the original mineral structure and make the mineral composition It is more complicated, thus changing the physical and chemical properties, and at the same time, oxidation will change the pH of the pulp, which will affect the use of chemicals.

There is a great relationship between pulp concentration and recovery rate. Generally speaking, there is a normal distribution between the slurry concentration and the recovery rate. Only when the optimal concentration is reached, the recovery rate also reaches its peak. In the flotation process, the slurry must maintain a certain concentration of reagent to obtain good results. When the slurry is thicker, the reagent concentration should be increased accordingly. When the slurry concentration increases, the flotation time and processing capacity of the flotation machine should also increase accordingly.

The temperature of the slurry is also an important factor affecting the flotation effect. Heating can accelerate the movement of molecules, accelerate the dispersion and hydrolysis of the reagent, and increase the interaction speed between the reagent and the mineral surface.

The pH of the pulp often affects the floatability of the mineral, but the critical pH will change with the change of flotation conditions. Under certain conditions, any mineral has a suitable pH value, and only under this value can a better flotation index be obtained.

Flotation time refers to the residence time of the slurry in the flotation tank. To determine the best flotation time, it should be determined in advance through the beneficiation test. When the floatability is good, the content of the minerals to be floated is low, the slurry concentration is small, the agent has a strong effect, and the flotation time is short. On the contrary, longer floating time is required.

The appropriate grinding fineness should be determined according to the particle size of the useful minerals, to dissociate the useful minerals from the gangue, and minimize the symbiosis between the minerals and the gangue. For single minerals, the fineness of grinding must be less than the upper limit of the floating particle size of the mineral.

However, it should be noted that the finely ground particle size of the ore will also have an adverse effect on the flotation effect, so the selection of the appropriate grinding particle size is of decisive significance for the final effect.

In the flotation process, the agent addition system is called the formula, which mainly refers to the type, quantity, order, addition point and preparation method of the agent. The type of medicament is mainly determined by the results of ore selectivity research, and the dosage of medicament is determined by the beneficiation test and practical experience. In the actual operation process, timely adjustments should be made according to changes in the situation. It is determined according to the dissolution rate and action time of the drug.

Every detail in the flotation process will affect the final flotation effect. It is recommended to conduct a beneficiation test before flotation, and determine the process parameters according to the beneficiation test results to achieve the best results.