Process indicators of limestone ball mill

Limestone from limestone silo (particles no larger than 20 mm) is fed into the wet ball mill from one end of the drum via a weighing feeder, while injecting the right amount of process water, the use of steel balls in the mill drum to grind limestone, ground slurry discharged from the other end. Ball mill outlet has a set of reverse rotation of the spiral piece, in the process of rotating the ball back to the ball mill. There is a cylindrical sieve with holes outside the outlet of the mill, the slurry can be discharged through the orifice into the slurry circulation tank, the ball and large particles of debris left in the ball mill. If the material into the grinding of large size, uneven feeding, the grinding is difficult, the mill output, low quality, power consumption is also large. In order to give full play to the maximum efficiency of the mill, generally the limestone material into the grinding particle size should be controlled within the following range: limestone feed less than 20mm, of which: less than or equal to 7-10mm accounted for 80%. If the water into the mill material is too large, easy to make fine particles of material attached to the material conveying piping, in addition to the system of material balance will also have an impact. General limestone material into the mill to control the water within the following range: The moisture content of limestone feed less than 3%. Abrasion product fineness, for desulfurization system will have a certain impact, therefore, in general, the fineness of the mill product, not only increased the surface area of the material, but also to promote its chemical reaction more fully, is conducive to improving the desulfurization effect. But can not only emphasize the fineness, without considering the economic benefits, too small will reduce the mill output, increase power consumption and increase production costs. Therefore, according to the situation to choose a reasonable mill output particle size. The limestone discharge size is generally controlled within the following limits: 325 mesh (44 μm) 90% pass (finished slurry).