Ball mill grinding fineness of grinding production cost impact analysis is part of the concentrator high, how effective and reasonable control of the grinding fineness is dressing directly reduce costs, improve important economic factor processing plant. We must first fully understand the factors of grinding fineness. To sum up, the grinding fineness factors are: ore hardness, crushing particle size, the grid mesh sieve, to the ore size, number of balls, ball size ratio, ball mill liner wear, ball mill Pai mine mouth flush size. Understanding all of these factors in the production operation, we want to find one by one to find the best adjustment factor. Ore mineral hardness: different minerals, its hardness is not the same, this factor is fixed with respect to the same ore, but also can not be adjusted. However, in the production of Shanghai powder grader, under the premise of beneficiation technology requirements can be reasonably ore, the ore as possible uniform size, bulk, powdered ore ratio is reasonable stable. Grading machine spindle lifting height, is also an important factor in returning the amount of sand and grinding fineness of. The normal grading machine spindle production requirements into place. Some workers in the concentrator milling equipment maintenance, as ore grading machine not clean, sink set in a long time, relatively heavy solid sludge, grading machine spindle at the lower levels, because they do not care, did not completely drop spindle , resulting in less than normal amount of sand back to the case. Broken particle size, grate sieve adjustment is construction related, grader blades wear: worn blade with respect to return the amount of sand is reduced, resulting in grinding fineness thicker, in addition, if badly worn blades, will affect grader life, so timely inspection work in blade wear, classifier overflow weir level, affecting the size of ore precipitation zone, in production we can request the grinding fineness and appropriate for the grade level adjustments overflow weir If the requested grinding fineness thinning Shanghai powder grader grader in two edge angle iron welded certain height, with a wooden pull plug method to adjust the level of the classifier overflow weir, sometimes after long-term accumulation of sludge, naturally increase the height of the weir. Flotation mechanical structure and characteristics of the flotation machine features: Flotation machine Structure: The machine is mainly composed of a stirring mechanism, tank, squeegee mechanism, the stator, the rotor ore tank level adjustment mechanism. 1, the impeller 1 by the stirring mechanism, a stator 2, a sleeve 3, bearing 4, tapered roller bearings 5, air pipe 6, sub large pulley 7, the small pulley 8, the motor 9 composition. Impeller radiation situation was arranged by the straight blade composition, coupled with what the upper cover plates. There on the cover open for inhalation endless loop hole at the bottom of the pulp used. The stator impeller covered and secured to the sleeve by a garden cover and vanes components. With axial and radial impeller clearance was 10 mm. Six outer stator cover long waist-shaped hole for center feed use, the inner circulation holes (φ35 mm) for the upper tank pulp cycle purposes. Because the impeller middle partition plate is inclined with the horizontal tilt angle, whenever the impeller rotates Shanghai powder classifier, the middle plate and the stator cover and the space formed by the lower plate and blade cover and blade around, every moment When all the changes, when pulp flowing from the central impeller diameter, the radial and axial has the speed difference, so the three-phase slurry bubble mixture alternately by rolling and extended role, which for pulp and bubble mineralization and favorable, thereby increasing the flotation rate. Pulp between the stator cover two laps inside and outside the loop hole of participating in the loop. 2, tank: tank cross section of inverted trapezoidal cross-section Shanghai powder grader, is conducive to mineralization and secondary enrichment. Communication between the chambers, slurry flows into the impeller chamber to the next through the controlled gate and a central cavity into the bins. Center feeding under suction smaller than expected resistance, and can effectively prevent the string material for pulp flotation, flotation machine is the traditional way of feeding. 3, in case mine action: through the gate opened and closed in different parts of the election can be selected once or twice-election process. So that the flotation process has two advantages flexible to accommodate a variety of pulp. Frequent changes in production status. 4, scraper mechanism: both sides of the upper portion of each tank float washing machine installed a set of rotating blades to scrape the foam concentrate. By the turbine gear, motors, pulleys, bearing, belt drive scraper shaft composition. Biaxial grader, North mine Zhongcheng (online consultation), Shanghai grader from Shenyang North Mine Zhongcheng machinery Limited. Shenyang North Mine Zhongcheng equipment Limited (sybkzc.com) (www.sybkzcjq.com) Liaoning Shenyang, machining leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. In North mine public into leadership with the staff warmly welcome all inquiries negotiations to create the North mine public into a better future.