Many of the factors is not subject to the control of researchers subjective and objective factors, such as ore characteristics, water content and ambient temperature; others are researchers can adjust the control of operational factors, such as grinding fineness, pulp concentration, pulp pH, pharmaceutical systems. Mixing time and intensity, strength and inflatable flotation machine mixing capacity and flotation time, with the effect of sorting is very sensitive to changes in these factors.

Thus, not only in the development of many ore bodies before, but still continued in production after the flotation research, until the ore completely taken until the end, of course, most of these studies is the application of new pharmaceutical and process changes, and few for equipment replacement. Flotation is a rapid development of science, has accumulated enough knowledge and experience of personnel proposed for the flotation test pilot reference, but very few can be directly selected according to documented processes and conditions directly. System test is always essential, the pilot project during the test must also be constantly revised.

Taking into account the representation of the specimen and laboratory efficiency of small mill, flotation test particle size generally less than 1 to 3 mm. The original sample can be used jaw crusher crushing score based on the required segment or segments broken into about 6 mm below, and then closed with a vibrating screen machine on roller mill for crushing the ore particle size. The crushing process should avoid the loss of dust flying, especially in high grade when the dust.

If the ores contain sulfide minerals, in particular, contains large amounts of pyrrhotite, the oxidation of the flotation test results may have significant impact, and therefore the sample should be as broken phases, so that a large 111201290901ber of samples in the coarse under the storage size. In the sample preparation process, but also to prevent contamination of the sample, mixed with a small amount of oil will prevent the normal flotation. Sealed sample shall be stored in a dry, cool, ventilated place and not susceptible to pollution, but even so, not easily oxidized ore appropriate for long-term placement.

Laboratory flotation tests is usually caused by a series of test batches of cells composed of Guchang called ¡°batch flotation test¡± to distinguish it in the middle of testing and industrial test equipment on the continuity of the experiment.

Laboratory flotation tests each sample volume is generally 500, 1000 or 2000 grams, corresponding to the inner wall of the grinding machine §¶200 mm and down size than those appropriate to prepare a small mill for regrinding intermediate products with. Cylindrical shape with a good body, It can also be loaded ball rod length and diameter of the same or slightly longer. According to the mineral particle size and particle size and tube size selection of 2 to 3 different sizes of ball, the smallest for the 12.5 to 15 mm, greatest for the 25 to 32 mm.

Coarse grinding ball when the same 111201290901ber of medium and small can, when finely ground can equal the weight of medium and small ball, usually can be in between. Concentration by grinding a lot of literature often 50 to 67% solids, the equivalent of liquid to solid weight ratio equal to 1:1 to 1:2, while the author was inclined to use existing plant with a similar concentration, for example, in the general hard ore is 75% (solid (liquid to solid ratio of 1:3) or so, in this case more uniform particle size, less than coarse particles; the other hand, if the ore contains more clay and fine particle size or density-hour , to adopt a lower concentration in the sample density is large or very small, but also change the concentration by volume (solid volume accounted for the total volume of slurry) for 40 to 50% of the grinding water. In short, the slurry viscosity should be moderate.

From:http://www.vipeakmill.com/