time and lurry temperature of flotation process

1. Times And Lurry Temperature of flotation process Shanghai Shuosen Mining Machine Co.,Ltd 2019-3-2 1

2. Times of flotation process In the flotation process, the standing time of slurry in the flotation tank of the operation is called the flotation time, and the sum of the rough flotation operation and each scavenging operation is the total flotation time of the process. The optimum flotation time of various ores can be determined by experimental study. When the mineral floatability is good, the content of floating minerals is low, flotation feed size is appropriate , pulp concentration is small, strong drug action, the more air is pumped into the flotation machine, required flotation time is shorter. Conversely, a longer flotation time is required. Relationship between flotation time and flotation index: increasing flotation time can increase the recovery rate, but decrease the concentrate grade.The recovery rate increases rapidly at the beginning, and gradually decreases with the extension of flotation time to a fixed value. In flotation practice, the length of flotation time is often used to judge the speed of flotation.Obviously, the shorter the flotation time to achieve the required recovery rate, the faster the flotation speed.In the design of flotation plant, the number of flotation machines is usually determined by the flotation time required to meet the design index. In actual production, the flotation time can be shortened by increasing the concentration of slurry Under the premise of constant ore capacity .When the ore amount is increased, increasing the pulp concentration can alleviate the shortage of flotation time. Within a certain range, increasing the number of coarse, scavenging and flotation slots can increase the flotation time and improve the recovery rate.Increasing the number of times of concentration or the number of flotation tanks can increase the time of concentration, which is conducive to improving the concentrate grade but reducing the recovery rate. Factors influencing flotation time include: 1.ore properties (such as floatability and content of minerals to float); 2.feeding granularity of flotation; 3.slurry concentration; 4.pharmaceutical system; 5.the form of mineral separation. 2019-3-2 2

3. Lurry Temperature of flotation process By increasing the temperature of flotation slurry, the flotation speed can be increased and the recovery and concentrate quality can be improved. Slurry temperature also has an effect on activator and inhibitor. Generally speaking, when the temperature rises, the effect of activator and inhibitor is strengthened and accelerated, while when the temperature decreases, the effect is weaker and slower, and the flotation index is reduced. In order to promote the sulfide action of sodium sulfide, the slurry often needs to be heated during the flotation of some refractory nonferrous metal oxidation ores.In the flotation of non - metallic ore, the temperature effect is greater. Generally in winter, the dressing plant will choose to increase the temperature of flotation pulp.Due to the large amount of ore slurry dressing plant, if in order to adjust the temperature, and a large number of ore slurry heating is not cost-effective.Therefore, the general flotation process is carried out at room temperature. Temperature does not have a great impact on the xanthate , mainly because the xanthate in the flotation, because it is soluble in water, so the temperature does not have a great impact, do not need to add temperature. 2019-3-2 3

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