Grinding Mill

LM series vertical grinding mill

LM series vertical grinding mill machine is a kind of large grinding equipment, is my company with many years of production experience, integrated design and development of a set of crushing, grinding, powder selection, drying, material handling and other functions in one of the five major large grinding mill equipment, has the process is concentrated, small occupation area, less investment, high efficiency energy saving, environmental protection and many other characteristics. LM series vertical grinding mill into the mine mill, coal mill, difficult to grind three types. Grinding mill is applicable to the cement industry raw material industry; coal mill can be widely applied to pulverized coal, power, iron and steel, cement, building materials, metallurgy chemical industry preparation; difficult to grind for steel, iron slag, slag, also suitable for cement clinker and other chemical raw material etc..

Working principle of vertical grinding mill

The motor drives the disc through the speed reducer to rotate, small Raymond mill also hot air can enter from the air inlet vertical mill, Zenith vertical grinding mill material from the feed opening to the central disc, due to the centrifugal force, the material is moved from the center to the edge of the grinding disc disc, the disc by an annular groove, the grinding roller compacted and crushed by, crushed material continues to move to the edge of the grinding disc, until the wind ring away, and the large granular material and fall into the disc to smash, airflow materials through the upper part of the separator, guide blades under the action of coarse material from the cone bucket fell, disc, LM vertical grinding mill fine fly along with the air out of mill dust collector, is the collection, the powder is collected is the vertical mill of a product. The process of gas in the casing material in contact to be dried, humidity dry products demand. By adjusting the separator guide blade angle (small vertical mill is not adjustable) and separator rotor speed, can achieve the required thickness of products.

LM vertical grinding mill use scope

The vertical grinding mill machine is suitable for medium and small mines, chemical industry, building materials, metallurgy, refractory materials, pharmaceutical, cement and other industries. Widely used in metallurgy, building materials, chemical industry, mining and other fields, grinding processing of mining products, suitable for processing a Mohs hardness of seven below the level of humidity below 6%, in a variety of non flammable and explosive minerals, such as gypsum, talc, calcite, limestone, marble, potassium feldspar, dolomite, barite, granite, kaolin, Peng Runtu, stone, bauxite, iron oxide red, iron ore, finished 613 microns in diameter ~440 microns (0.613 mm -0.044 mm), through the analysis of interaction of machine and fan, which can meet the use requirements of different users.

Grinding Mill

With the unprecedented development of cement industry, the development of grinding machine industry is very quick. The legislative process system of grinding mill process simple, low unit power consumption, cement stable product quality and convenient operation has been all users. In foreign countries, especially the developed countries, the effect of input and output of the mill proceeds quite amazing, which promote the development of foreign cement vertical mill finish grinding technology.

In our country, the promotion and use of vertical grinding mill seems a bit slow. Due to the use of habit, ball mill, roller press as the traditional ball mill grinding equipment, which has more than 100 years of history, especially the low cost, the ball mill cement sphericity Gauguin is let very favour of cement plant. With the development of the times, although the ball mill is very harmful to the environment in the use of the process, but due to lack of funds and technical resources consuming, most enterprises still choose as the main cement ball mill grinding equipment. Two is the number of cement factory by the "cement vertical mill production finished particle shape is not good, the water requirement" remarks by the impact, not comprehensive understanding of cement vertical mill. In fact, the expert points out, some professional major manufacturers through adjusting the grinding disc and the grinding roller design can solve the cement vertical mill product from the spherical particle shape distribution is not good, too narrow issue, so as to improve the vertical mill cement workability.

Cement production line with heavy machine building a 5000t/d in some countries, the equipment adopts 2 cement vertical mill, the cement plant tons of product power consumption is reduced to 78kWh/t~80kWh/t, and the quality of cement are obtained user's consistent affirmation.

From the Southwest University of Science and Technology had done "was informed that the different flow of cement standard consistency water experimental data obtained", actually need the highest content are closed combined grinding system, rather than the vertical mill.

In order to better study the cement vertical mill, ball mill, roller press in the application of the domestic actual situation, some industry experts for the comparative study of the many several grinding equipment, the final result, cement vertical mill finish grinding in power consumption, investment, product performance and other aspects is superior to traditional grinding process, which can meet various needs of the project roller press, ball mill, and compared with the traditional process, the vertical mill finish grinding process is simple, the raw material moisture content and hardness of high adaptability, low yield per unit of installed power, electrical and mechanical equipment quantity are few, has obvious advantages!

Technical data

LM Vertical Grinding Mill
Model LM
Wheel diameter(mm) 1300 1500 1700 1900 2200 1300 1500 1700 1900 2200 1300 1500 1700 1900 2200
Output (th) 10-30 13-40 18-57 23-72 36-110 10-15 16-22 20-28 26-35 35-50 5-14 7-20 8-27 9-30 18-55
Finish fineness µm 170-45 170-45 170-45 170-45 170-45   170-45 170-45 170-45 170-45 170-45
Mesh 80-325 80-325 80-325 80-325 80-325   80-325 80-325 80-325 80-325 80-325
Coal powder fineness (R0.08) 5-20% 5-20% 5-20% 5-20% 5-20%  
Coal powder moisture (%) <1% <1% <1% <1% <1%
End product moisture (%) ≤1% ≤1% ≤1% ≤1% ≤1% ≤1% ≤1% ≤1% ≤% ≤1%
Grinding material particle size D80 (mm) <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10
Grinding material max feed size(mm) <38 <40 <42 <45 <50 <38 <40 <42 <45 <50 <38 <40 <42 <45 <50
Moisture of grinding material not to dry (%) <4% <4% <4% <4% <4% <4% <4% <4% <4% <4%
Matieral moisture of into mill (%) <15% <15% <15% <15% <15%
Moisture of grinding material need to dry (%) 4%-15% 4%-15% 4%-15% 4%-15% 4%-15% 4%-15% 4%-15% 4%-15% 4%-15% 4%-15%
Into mill air temperature (℃) <350 <350 <350 <350 <350 <350 <350 <350 <350 <350 <350 <350 <350 <350 <350
Out of the mill air temperature (℃) 70-95 70-95 70-95 70-95 70-95 75-95 75-95 75-95 75-95 75-95 70-95 70-95 70-95 70-95 70-95
Raw coal hardgrove grindability index (HGI) >55 >55 >55 >55 >55
Main motor power (kw) 200 280 400 500 800 185 250 315 400 500 200 280 400 500 800
Contour dimension Length (mm) 5520 6550 7170 7580 8080 5520 6550 7170 7580 8080 5520 6550 7170 7580 8080
Width (mm) 2500 3070 3460 3320 4660 2500 3070 3460 3320 6700 2500 3070 3460 3320 4660
Height (mm) 7060 7560 8300 8960 9020 7060 7560 8300 8960 9020 7060 7560 8300 8960 9020