Presentación de PowerPoint

DISEÑO DE FUNDACIONES DE
MULTIPLES MOLINOS VERTICALES
ENFOCADO A MITIGACION DE
VIBRACIONES DURANTE SU
OPERACIÓN CONJUNTA
Guillermo Etse PhD,
Juan Grassetto, Monica Perosa
MOTIVACIÓN
• Mitigar vibraciones producto de la operación
simultanea de múltiples molinos verticales en
plantas cementeras
• Reducir potencialidad de resonancia dinámica
• Mejorar la sustentabilidad de la operación de
molienda de crudo, cemento y carbon
• Reducir CapEx
AGENDA
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Introducción
Metodología de diseño dinámico de fundaciones
Caso de análisis
Operación aislada vs. Múltiple de molinos verticales
Efecto de la rigidez de los suelos de fundación
Efecto de la distancia entre molinos
Costos y acciones para reducir CapEx
Conclusiones y Recomendaciones
INTRODUCCIÓN
Dynamic Method (wave
transmision) F(t)
Static Method (Strength)
F
M
M
K
K
Equivalent
mechanical
system
F
R1 Strength
F
M
V
T1
K
R2
t
K2
K1 Stiffness K =
K1 (stiff soil)
K2 (soft soil)
U
T2
V (wave velocity) = V(K,)
 (frecuency) = 1/T = (K,M)
ASSESSMENT TESTS OF
SOIL DYNAMIC PROPERTIES
Impact Force
Cross Hole
Down Hole
Spectral Analysis of
Surface Waves - SASW
F
F(t)
Force spectrum
M

K
V
V
T1
Resonance
(M1,K1)
t
T2
(M2,K2)

Response spectrum of the foundation
system
Multiple Vertical Mills
Mill Acceleration Spectra
SYSTEMS OF MULTIPLE VERTICAL MILLS
1. CEMENT GRINDING PLANT
IN SOUTH AMERICA
Control Room
MILL 1
MILL 2
SYSTEMS OF SAG MILL AND STATOR
2. MINING PLANT IN SOUTH AMERICA
SYSTEMS OF MULTIPLE VERTICAL MILLS
3. CEMENT GRINDING PLANT IN BRAZIL
CASE STUDY 1
CASE STUDY 1
1 vs 3 Mills in Operation
Velocities Vertical Direction
10,00
V (mm/seg)
9,00
3 Mills in
Operation
8,00
7,00
6,00
5,00
4,00
3,00
2,00
1,00
Freq. (Hz)
0,00
0
5
10
15
20
25
30
CASE STUDY 1
3 Mills in Operation:
Influence of Soil Mechanical Features
Velocities in Vertical Direction
14,00
Vz (mm/seg)
3 Mills in Op
12,00
3 Mills in Op. - Soft Soils
10,00
8,00
6,00
4,00
Velocities in Horizontal Direction
2,00
1,80
0,00
1,50Freq. (Hz)
Vy (mm/seg)
25
30
1,20
0
5
10
15
20
3 Mills in Op.
3 Mills in Op. - Soft Soils
0,90
0,60
0,30
Freq. (Hz)
0,00
0
5
10
15
20
25
30
CASE STUDY 1
3 Mills in Operation: Influence of the
horizontal distance between Cement Mills
Vertical Velocities
14,00
Vz (mm/seg)
3 Mill in Op. - 100% distance
12,00
3 Mills in Op.-50% Distance
10,00
8,00
Horizontal Velocity
2,20
6,00
Vy (mm/seg)
4,00
3 Mills in Op.
1,70
3 Mills in Op.-50% Distance
2,00
1,20
Freq. (Hz)
0,00
0
5
10
15
20
25
30
0,70
0,20
0
-0,30
5
10
15
20
25
Freq. (Hz)
30
Control
Room
Mill 4
Mill 3
Vibration Velocities on Mills 3 and 4.
Mill 3 in operation, Mill 4 stop
CASE STUDY 2
Influence of the Mill
Operational Frequencies
Velocity (mm/s)
2 Vertical Mills in Operation:
Mill 3
Mill 4
Frequency (Hz)
CASE STUDY 2
2 Mills in Operation: Influence
of the Mill Operational Frequencies
M3 operating with variable
frequency and M4 in steady
state at 10 Hz
Only M3 in Operation
Frequency (Hz)
Velocity (mm/s)
Velocity (mm/s)
Only M3 in Operation
M3 operating with variable
frequency and M4 in steady
state at 20 Hz
Frequency (Hz)
CASE STUDY 2
2 Mills in Operation: Influence
of the Mill Operational Frequencies
Only M4 in Operation
Only M3 in Operation
Only M3 in Operation
Velocity (mm/s)
Velocity (mm/s)
M3 and M4 operating in resonance
M3 and M4 operating at 20Hz
M3 and M4 operating at variable frequency in
resonance
Frequency
Frequency
(Hz) (Hz)
CONCLUSIONES Y RECOMENDACIONES
AUTORES
Etse, Guillermo
Grassetto, Juan Pablo
Perosa, Mónica
SAXUM Engineered Solutions