LUM Ultrafine Vertical Grinding Mill is independently designed by LIMING on the basis of years of experience in grinding mill production. LUM grinding mill adopts the latest Taiwan grinding roller technology and German powder separating technology. The ultrafine vertical grinding mill integrating ultrafine powder grinding, grading and transporting has become a better choice in the ultrafine powder grinding industry.

Non-metallic minerals: calcium carbonate (calcite/marble/chalk), quartz, feldspar, kaolin, mica, talc, graphite, etc.
Specialty materials: aluminum hydroxide, micronized silica, titanium dioxide, flame retardants, and other fine chemical raw materials.

Limestone, calcite, dolomite, petroleum coal, gypsum, barite, marble, talc, coal powder, etc. Superfine dry powder of none-metal ores such as calcite, marble, limestone, coarse whiting, talc, barite and dolomite and so on.

Higher Yielding Rate, Better Quality
In order to avoid materials' long lingering time, repeated grinding, high iron content and other problems occurring during the grinding process of traditional grinding mills, LIMING specially designed unique roller shell and lining plate grinding curve. This design is easier to generate material layer, and can realize high rate of finished products by once powder milling, which can greatly enhance the working efficiency of grinding mill and improve the whiteness and cleanliness of finished products.

More Energy-Saving Multi-Head Powder Separating Technology
LIMING adopted PLC control system and multi-head powder separating technology in this grinding mill, which completely solve two problems, i.e. "high-precision and accurate cutting powder diameter, and fast switch of different production demands". Users can accurately control the grinding pressure, revolving speed and other equipment working parameters. Compared with common grinding mills, this grinding mill reduces the energy consumption by 30%-50%.

Double Position-Limiting Technology Makes Operation More Stable
In the LUM Ultrafine Vertical Grinding Mill, the contact point between roller shell and millstone liner plate adopts electronic limiting technology and mechanical limiting protection technology, which can avoid the destructive impact (e.g. the grinding roller directly smashing the millstone) caused by machine vibration (e.g. machine vibration caused by mine explosion) and guarantee the operation stability.

Reversible Structure Gets Maintenance Easier
During the design process of LUM Ultrafine Vertical Grinding Mill, LIMING fully considered the maintenance problems which may be caused by heavy grinding roller, and finally developed and designed the reversible structure. Through this structure and hydraulic adjustment system, the operator can easily and rapidly move the grinding roller out of the body for checking and replacing roller shell and liner plate, and carry out other maintenance operations, so as to reduce the shutdown losses.

Digitalized Processing, Higher Precision
There are tens of lines of numerical controlling machine tools. Operations such as steel plates' cutting, bending, planing, milling and paint spraying are all controlled numerically. The machining precision is high, especially for the core parts.

Sufficient Supply Of Spare Parts, Worry-Free Operation
LIMING, whose businesses cover production and sales, takes responsibility for every machine produced by ourselves. We can offer customers technical services about products and original spare parts to ensure the worry-free operation.

The main motor drives the millstone to rotate through the reduction box, meanwhile, the air flow gets into the mill through air intake. The materials come out of the screw feeder and fall on the center of the millstone, and then they will move from the center to the edge of the millstone under the affect of centrifugal force. When they move across the grinding zone, they will get grinded by the rollers. Those materials in big pieces will be crushed and grinded directly while those small ones will get extruded and they will form a material bed in which intergranule and mutual grinding will take place. The grinded materials keep moving to the edge of the millstone until they are taken away by the air current at the air ring, and the big pieces will fall again on the millstone to be grinded. The materials in the air flow will go through the rotor vanes on the separator above.

The coarse powder will go back to the millstone while the eligible powder will go out of the mill together with the air flow and get collected by the powder collector. Those collected powder is the final products of the LUM grinding mill. The sundries mixed in the materials that go into the mill, iron piece for instance, will move to the edge of the millstone with the materials and fall down to the bottom part of the mill since they can not be blown up because of their own weight. And then these sundries will be scraped to the slag-discharge opening and discharged out of the mill. The final products can be in different fineness through adjusting the rotating speed of the rotor of the powder concentrator. The pressure on the rollers can also be changed by adjusting the pressure of the hydraulic system so that the mills can process the materials in different hardness. Besides, the load and capacity of the mill can be affected through adjusting the materials' feeding amount.