Cấu tạo máy nghiền bi design ball mill Tube mill design

Cấu tạo máy nghiền bi designballmill Tube mill design • General Overview • Drive • Slide Shoe Bearings • Oil Supply System • DIAPOL • Mill Inlet • Mill Discharge • Water Spray Cấu tạo máy nghiền bi designballmill Tube mill design • General Overview • Drive • Slide Shoe Bearings • Oil Supply System • DIAPOL • Mill Inlet • Mill Discharge • Water Spray

Tube mill design

Training

Polysius Headquarters / Germany

19 May – 13 June 2008

• General Overview

• Drive

• Slide Shoe Bearings

• Oil Supply System

• General Overview

• Drive

• Slide Shoe Bearings

• Oil Supply System

• Mill Inlet

• Mill Discharge

Content:

The principle of tube mills

1 Kammer 2 Kammer 1 Kammer 2 Kammer

Luftstrom Hubwand Hubwand Mittenaustrag Überlauf Hubwand Hubwand

Ball AG SAG Ball Ball Ball Ball SAG Ball AG SAG Ball

Produktstruktur:

Technical Data:

• Nominal Diameter 5600 mm

• Nominal Length 14500 mm

• Nominal Length of Compartment “l” 4000 mm

• Nominal Length of Compartment “ll” 10500 mm

• Noise (emission) > 90 dBa

THALOFA

Mill Types

Single compartment Two compartment Air swept Double rotator

Ball mill ( Two compartment )

Low-pressure

Air swept

DORO ( Double rotator )

Classifying liners in chamber 2

ROTATE

• General Overview

• Drive

• Slide Shoe Bearings

• Oil Supply System

• Mill Inlet

• Mill Discharge

Content:

COMBIFLEX Drive

Girth gear

Input shaft

PinionsAuxiliary drive

Self aligning pinion

COMBIFLEX Reducer

Self Aligning Pinions

Spray Nozzles

Advantages of the COMBIFLEX drive

• Common bearing and girth gear cover

– only two lube oil systems for the mill (one for fixed and floating side)

– 2 instead of 4 sealings for drive side required

• Low space requirements

– allows a more compact civil design

– allows several motor arrangements

• low operating cost

– no grease required

– low maintenance cost

– no necessity for realignment of drive

– only two lube oil systems for the mill

• low investment cost compared to central drives

Advantages of Combiflex drive (2)

• high availability and life time

– bending and thermal expansion do not result in overloading or

misaligning of toothing due to self aligning pinions and load distribution in 2nd gear stage

– no wear of tooth flanks due to oil lubrication

– low risk of pitting formation

– Lower stresses in the head walls compared to trunnion bearings

• bigger mill inlet and outlet cross sections possible

• easy adjustment of the mill shell in case of foundation settlements

• simple design of the water injection system

Ball mill with COMBIFLEX Drive

SAG mill with double COMBIFLEX Drive

ISAMUE (Ball mill and SAG)

Secondary millPrimary mill

Direct Drive

Central Drive

Central Drive

Required space

Mill with Combiflex drive

Mill with central drive

TM Ø 5,4m

→ Δl ~ 14m

COMBIFLEX vs Central drive

Ring motor

Ring motor (CERROMUE)

Stator

Rotor

Principle of asynchronous motor

→ Stator and rotor

→ electromagnetic induction

Stator

Rotor

• General Overview

• Drive

• Slide Shoe Bearings

• Oil Supply System

• Mill Inlet

• Mill Discharge

Content:

Slide shoe bearing

1 Lower housing segment

2 Dismounting flap

3 Oil return socket

4 Upper housing segment

5 Seal with dust cover

6 Bearing shoe

7 Axial pivoting bearing

8 Adjusting device of the bearing shoe

8 9

Slide shoe bearing

Optimized hydrodynamic bearing shoe

Measuring Shoe for Burzem

• double low pressure supply on both edges for better cooling and oil distribution

• shoe thickness optimized acc to load distribution

Slide shoe bearing arrangement

Installation of Mill Shell

max 1000 t dynamic load

30 bar

30 bar 30 bar

30 bar

Preparation for seal installation

- Cutting of drain slots

Amount 7 slots

Sizes 10 x 100 mm

Distance 150 mm

• General Overview

• Drive

• Slide Shoe Bearings

• Oil Supply System

• Mill Inlet

• Mill Discharge

Content:

Oil supply unit (DAMUE)

Oil tank Return lineOil water cooler

Cooling water connection

Pump

Double filter Roof

Oil supply unit

40 Level switch 60-64 Heating system

90 Low-pressure pump

130 Non-return valve

150 Pressure limiting valve

160 Oil filter 230,231 Pressure switch

370 Pressure switch

Tank group

Filter oil circuit

High pressure oil circuit

Oilstream splitter

Low pressure oil circuit

Oil supply system: flow sheet for fixed bearing

• General Overview

• Drive

• Slide Shoe Bearings

• Oil Supply System

• DIAPOL

• Mill Inlet

• Mill Discharge

Content:

Intermediate diaphragm

Discharge diaphragm

Problem description

Solution: DIAPOL

JND DCD DRD

DIAPOL© Old Polysius diaphragm

Air speed in the diaphragm

Properly stressed structure

• Consideration of the wall in assembled state

• Wall is made up of individual segments

ø 5.4 m x 14.5 m (EGL)

Optimal material behind the DIAPOL!

Process engineering advantages

• Large central opening:

• Reduced air velocity:

• Minimized air flow transport

• Lower pressure drop

• Tangential arranged lifter scoop:

• Separation of air and material by tangential material inlet :

• Minimised air flow transport

• Tangential material inlet directly behind the diaphragm:

• Improved grinding process

• Lower wear

• Consistent filling level, even with fluctuating throughput,

thanks to mature adjusting device

• General Overview

• Drive

• Slide Shoe Bearings

• Oil Supply System

• Mill Inlet

• Mill Discharge

Content:

Mill inlet

Mill inlet

Water injection Grinding aid

(Glycol)

• General Overview

• Drive

• Slide Shoe Bearings

• Oil Supply System

• Mill Inlet

• Mill Discharge

Content:

Mill discharge

8.1 Discharge housing 8.2 Outlet cone

8.3 supporting structure 8.4 Inspection door

8.6 Connecting flange for

exhaust air 8.7 Product discharge3

Mill discharge

Discharge of a cement mill (  3,6 x 11 m)

• General Overview

• Drive

• Slide Shoe Bearings

• Oil Supply System

Mill Inlet

Mill Discharge

Mill Liners

Discharge Diaphragm

Slide Shoe bearing

Slide Shoe bearing

Intermediate Diaphragm

Oil Supply

System

Water Spray

Water Spray System: layout

1.0 Injection lances 1.1 Protective air fan 1.2 Suction filter 1.3 Motor

1.4 Piping 1.5 Injection nozzle 2.0 Injection lance 2.1 Protective air fan 2.2 Suction filter 2.3 Motor

2.4 Piping 2.5 Rotary connecting element 2.6 Injection nozzle

A Control skid

A

Pump Power: 8.6 KW Pump Design Flow Rate: 7450 L/hr Pump Design Pressure: 10 Bar (147.5 PSI) Lance (1.0) Design Flow Rate: 3.5 m 3 /hr

Lance (2.0) Design Flow Rate: 3.5 m 3 /hr Fan Design Airflow: (Lance 1) 360 m 3 /hr (212 cfm) Fan Design Airflow: (Lance 2) 540 m 3 /hr (318 cfm)

Water Spray System: Control skid

3.1 Shut-off valve (water inlet) 3.2 Drain valve

4 Change-over filter 5.1 Motor

5.2 Coupling 5.3 Overflow valve 5.4 Drain plug

6 Contact pressure gauge

7 Drain and vent valves

8 Solenoid valve 9,12 Motorized valve for injection lances 1.0, 2.0 10,13 Flow meter for injection lances 1.0, 2.0 11,14 Pressure gauge for injection

lances 1.0, 2.0