Vertical Roller Mill for GGBS

Application	Cement Plant, Clinker Grinding Unit, Steel Mill
Capacity	30-180 t/h
Motor Power	1600-5000 kW
Fineness	4200-4500 cm²/g

Overview

GGBS vertical mill is the equipment to grind Ground Granulated Blast furnace Slag (GGBS) into small particles. In China, quality GGBS (fineness:4200-4500cm2/g) produced by vertical roller mills are being used to substitute clinker in conventional cement manufacturing as well as to partially replace OPC for ready-mixed concrete production, for which the percentage of GGBS usage is typically at 10-15% and 20-25% respectively.

Features
1. Iron extraction system
It is a well-known fact that iron particles in the granulated blast furnace slag are the main cause of wear in the mill. Therefore it is extremely important to remove the maximum possible amount of this iron. The external material circuit is very well suited for this purpose, because it handles a large quantity of material, some of which is already partly ground.

2. Wear protection
The grinding plant, which is carefully maintained by the owner, provided high availability and trouble-free operation. None of the wear protection plates in the roller mill housing and in the grit cone of the separator have yet needed replacing. Only the ceramic castable in the upper housing section of the separator was replaced by wear-resistant steel plates soon after the commissioning.

Vertical Roller Mill Working Principle





Specifications

Model	Grinding Table Diameter (mm)	Roller Diameter (mm)	Roller Number (n)	Motor (kW)	Output (t/h)
GRMS26.21	2600	1600	2	1000	30
GRMS33.31	3300	1700	3	1600	50
GRMS35.31	3500	1800	3	1800	60
GRMS40.41	4000	1900	4	2240	70
GRMS43.41	4300	2120	4	2800	90
GRMS46.41	4600	2240	4	3150	105
GRMS48.41	4800	2240	4	3550	125
GRMS50.41	5000	2360	4	3800	140
GRMS53.41	5300	2500	4	4200	160
GRMS56.61	5600	2500	6	5000	180

Note: mill spectral pattern benchmark
1. Material medium friction (MFs) =0.9~1.0;
2. Material moisture max. 15%;
3. Refined powder granularity 4200~4500 cm²/g;
4. Refined powder moisture 0.5~1.0%;
5. The concrete mill installed power and technology parameter will be adjusted appropriately basing on the actual material property and requirements of owner.

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