Hosokawa - Mikro-LGM

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The Mikro-LGM long gap mill assures superior product quality and peak operational efficiency. Built upon the strength of Hosokawa’s unparalleled experience in size reduction, thermal processing and classification, the Mikro-LGM long gap mill is designed to meet the exacting demands of a wide variety of industrial applications.

Prior to the development of the Mikro-LGM long gap mill, materials had to be dried and de-agglomerated in two separate operations. For example, a rotary drum dryer was used to dry materials that had been wet milled. A separate grinding/de-agglomeration process followed the drying operation. The Mikro-LGM long gap mill is Hosokawa’s solution for streamlining these two operations into one continuous process. This type of dryer is commonly referred to as a “gap” type mill. It is called a “long” gap mill because of the long annular gap path the process material takes from the inlet to the discharge. By combining several operations such as flash drying, de-agglomeration and surface coating into one operation, a Mikro-LGM long gap mill eliminates the need for multiple material handling systems which subsequently increases process efficiencies. The dried powders often do not require any further size reduction. Both slurries and wet cake can be handled.

The Mikro-LGM modular design expands its range of applications beyond drying and deagglomeration. For dry grinding, modular options include: direct and independent drive classifiers; pre-grind rotor stage; an integrated jet mill and variable stage rotor design. The smaller size Mikro- LGM Long Gap Mills are engineered with a split body housing for easy maintenance and cleaning. The Mikro-LGM long gap mill processes high moisture materials in wet cake form as well as dry solid feed stocks up to one inch. Finished product particle sizes of D₉₇ < 10 microns can be achieved.

Typical Applications	Design Options
Mineral Fillers	Variable rotor height to diameter ratios
Carbon Black	Adjustable gap clearance
Pigments	Frequency controlled rotor drive
Chemicals	Adjustable coarse extraction and recirculation device
PVC Resin	Independent or single shaft internal classifier
Amorphous and Fumed Silica	Liquid injection device for coating application
Foodstuff	Pre-grinding rotor for large feed material
Minerals
Cryogenic Grinding of Rubber and Elastomers

 

The Mikro-LGM long gap mill has demonstrated superior performance over all other mechanical mills in reducing grit from pre-sized and agglomerated powders. Typical results are less than 1 part per million (ppm) residue on a 44 micron sieve starting from a feed stock with a residue of 120ppm.

This performance is achieved with a powerful grinding mechanism coupled with a precision internal air classifier. The air classifier is designed for a theoretical cut point of 2-5 microns, depending on the particle density. Rejected particles are forced away from the classifier wheel and redirected outside of the mill back to the material inlet using a patented re-circulation system.

Model	HP (max)	Air Flow SCFM(max)	Feed(max)	Evaporation (ibl/hr)*	Dimensions(in.)	Rotor Speed(RPM)	Factor
LGM3	30	800	1500	150	15x19x38	6000	1
LGM6	100	3200	6000	600	76x38x61	3200	4
LGM8	200	5500	11000	1000	95x50x71	2400	7
LGM11	300	10000	18000	1800	103x65x87	1750	12
LGM15	600	18000	30000	3000	150x87x112	1300	20
LGM22	1000	36000	67500	6750		900	45