Vertical roller mills have improved the shortcomings of traditional cement production processes?
The vertical grinding is developed rapidly at home and abroad. The cement powder vertical roller mill specializes in the processing of cement as an important component - fly ash. The LM vertical roller mill is a relatively new fly ash grinder and introduces the fourth generation of European mills. Improve the technology and concept of the predecessors, boldly and bravely improve on the basis of the original cement vertical roller mill, the fineness of the finished product can be adjusted from 20-425 mesh (up to 2000 mesh), depending on the model, the output varies from 1-30T/hour. The average energy consumption ratio is at the level, which has changed two defects in the traditional vertical roller mill production process:
1 Mixing abrasives to improve the flowability of cement vertical roller mill materials: Fly ash itself is as fine as cement. From the consideration of fineness, it has reached the requirements of finished cement products. If this fine powder is placed in the vertical roller mill, it will form a sponge. The cushion layer increases the material load in the mill, reduces the efficiency of the mill, and limits the mill output.
2 Cement vertical roller mill effectively protects the glass microspheres in fly ash: Because fly ash is two kinds of powder waste discharged from thermal power plants, it contains spherical glass beads which are very useful for improving cement function because of its smooth surface. The frictional resistance between the particles is small and easy to slide. Therefore, retaining the spherical glass beads of this department is beneficial to improve the activity and workability of the cement, and can play an obvious role in improving the cement function and the cement concrete construction function. However, after the fly ash is ground and ground, the spheres of the glass beads are destroyed to form polygonal particles, which causes the friction between the cement particles to increase, thereby affecting the activity of the cement.
3 conveyor belt transportation, improve the original cement raw material storage method: the existing cement raw material storage method, the second use of large storage materials. However, the storage and unloading of fly ash is not suitable. This is because the fly ash is powdery, and the second is not good accumulation. The second is that the dust raised during unloading is large and pollutes the environment. If it is put into the warehouse from the high level of the storage stock, it is necessary to add two sets of promotion and transportation equipment, which is time-consuming and time-consuming, and the cost is high.
The shortcomings of the traditional mill's production process, modern cement vertical roller mill improved the fly ash processing process according to the actual situation. The raw material produced by fly ash cement is made up of three kinds of materials: fly ash, cement clinker and gypsum. Among them, the cement clinker is made of limestone, clay, iron powder according to the quantitative ratio of the proportion of ground raw materials, after calcination to make granular cement clinker. In the traditional cement grinding process, the fly ash, cement clinker and gypsum stone are mixed into the mill for grinding after the ratio, and the mixed mixture enters the classifier for separation. The cement powder required by the degree is sorted out into cement finished products in time, and the coarser particulate materials are re-grinded into the finished product by the internal grinding machine.
SBM cement vertical roller mill has been widely used in many areas of the country, from appearance, processing technology, grinding rotor, powder selection system, inlet and lubrication system, transmission system, powder collecting system, lifting system, grinding system, etc. The second series has been improved and achieved the relatively high efficiency of the equipment. The cement vertical roller mill is suitable for the grinding of various mineral products with a Mohs hardness of 9.3 or less and a humidity of 10% or less in limestone, fly ash and other industries. The customer's cement vertical grinding equipment is an extraordinary choice.
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