Working with cement vertical mill difficulty to be solved

Grinding procedure and issues of ball and roller mill grinding approach is distinctive. Material in a ball mill is crushed by the influence and friction; and the material in the vertical grinding mill suffered extrusion force is based, supplemented by grinding; shorter grinding materials inside the vertical mill, 2-3 min to complete, and hence Higher grinding efficiency, saving grinding energy consumption. Normally vertical roller mill can grind the opposition than milling, inside the raw material or pulverized coal grinding mill within the raw water is higher, generally up to 5 or far more, for drying capacity needs are reasonably higher, whilst the cement grinding mill material into dry , no moisture or low drying capacity requirement is secondary ; The raw material grinding fineness much less demanding, the common control of 0.08 mm sieve 12 is usually, for straightforward burning with superior raw material for the fineness of precalciner can even be relaxed to 15 to 20, but additionally for particle size distribution base will not be necessary, but persons around the cement item fineness and particle size distribution are greater, and cement fineness Common needs Blaine specific surface area of ??more than m / kg. By vertical roller mill grinding cement, the main challenge to become solved could be the mill vibration, severe wear and disc grinding roller as well as the cement quality. Due to dry materials, goods and cement grinding fineness needs, material circulation volume, circulation material is quite fine, excellent liquidity, operating under the influence of centrifugal disc, and soon left towards the disc outer rings blown by the wind speed airflow away, it really is tough to form a steady material layer. Moreover, since the abrasive cement clinker Relatively strong around the disc plus the roller will produce a lot more significant wear and tear, causing mill production decline and increased operating expenses and also other concerns in addition when it comes to solution good quality, mill produces a wide range of cement particle composition, he incurs the over-grinding The fine particles are a lot more, but an additional element just isn't sufficiently coarse grinding Particles, and inside the RRB size distribution curve slope worth smaller than the diameter on the regular distribution curve is flat, spherical particles tend to form comparison. And much less material inside the classic vertical mill residence time, grinding track is shorter, so the vertical roller mill cement particles is narrow, the bigger its RRB worth curve, and much more commonly Above 1.ten, whilst cement milling is usually 0.95 to 1.05. Fine particles as well smaller may perhaps bring about low early strength, but the primary causes enhanced water demand. http://www.sbmproducts.com/product/grinding-mill/lum-vertical-roller-mill.html http://www.supercrushers.com/products/grinding/vertical-roller-mill.html http://www.sandcrusher.org/products/lum-ultrafine-vertical-roller-mill.html