Ingeniero Metalurgico

ENVIROGOLD (LAS LAGUNAS) LIMITED
LAS LAGUNAS GOLD TAILINGS PROJECT PROCESS CONTROL PHILOSOPHY
PLANT CONTROL PHILOSOPHY

3036-PCP-001 December 2009

File Location: 4.0\4.05 Rev: 0

0 REV NO.

09/12/2009 DATE

ISSUED FOR PROGRAMMING DESCRIPTION OF REVISION Lycopodium Minerals QLD Pty Ltd

CMK BY

CMK DESIGN APPROVAL

CT PROJECT APPROVAL CLIENT APPROVAL

ABN: 37 124 757 384 163Wharf Street, Spring Hill, Queensland 4000

LAS LAGUNAS GOLD TAILINGS PROJECT PROCESS CONTROL PHILOSOPHY
3036-PCP-001

Table of Contents
Page

ABBREVIATIONS 1.0 INTRODUCTION 1.1 Overview 1.2 Objective GENERAL CONTROL SYSTEM OVERVIEW 2.1 General Philosophy 2.2 Definitions 2.3 General Control Systems Design Criteria 2.4 Drive Modes of Operation 2.5 Valve Modes of Operation 2.6 Control Loops2.7 Group Commands 2.8 Alarming 2.8.1 First-up Alarming and Latching 2.8.2 Alarm Priorities 2.9 Controllers and Indicators 2.10 Emergency Stop Buttons / Safety Devices 2.11 Drive Current Monitoring SAMPLING AND METALLURGICAL ACCOUNTING 3.1 Automatic Sampling 3.2 Metallurgical Accounting PROCESS CONTROL OVERVIEW GENERIC CONTROL SYSTEMS 5.1 Belt Conveyors 5.1.1 Local Control Parameters and Inputs5.1.2 Manual Control Parameters and Inputs 5.1.3 Automatic Control Loops 5.1.4 Interlocks 5.1.5 Indicators 5.1.6 Control Sequences 5.1.7 Control Calculations 5.1.8 Failure Modes 5.2 Vertical Sump Pumps (Type 1 Sump Pump) 5.2.1 Local Control Parameters and Inputs 5.2.2 Manual Control Parameters and Inputs 5.2.3 Automatic Control Loops 5.2.4 Interlocks 5.2.5 Indicators 5.2.6 Control Sequences 5.2.7Control Calculations 5.2.8 Failure Modes 5.3 Diaphragm Sump Pumps (Type 2 Sump Pump)

1-1 1-2 1-2 1-3 2-1 2-1 2-1 2-2 2-3 2-4 2-4 2-4 2-5 2-5 2-5 2-5 2-5 2-6 3-1 3-1 3-1 4-1 5-1 5-1 5-1 5-1 5-1 5-2 5-2 5-2 5-2 5-2 5-2 5-3 5-3 5-3 5-3 5-4 5-4 5-4 5-4 5-4

2.0

3.0

4.0 5.0

3036-PCP-001_0

December 2009 Lycopodium Minerals QLD Pty Ltd

LAS LAGUNAS GOLD TAILINGS PROJECT PROCESS CONTROLPHILOSOPHY
3036-PCP-001

Table of Contents
Page 5.4 Slurry Pumps 5.4.1 Local Control Parameters and Inputs 5.4.2 Manual Control Parameters and Inputs 5.4.3 Automatic Control Loops 5.4.4 Interlocks 5.4.5 Indicators 5.4.6 Control Sequences 5.4.7 Control Calculations 5.4.8 Failure Modes Solution Pumps 5.5.1 Local Control Parameters and Inputs 5.5.2 Manual Control Parameters and Inputs 5.5.3Automatic Control Loops 5.5.4 Interlocks 5.5.5 Indicators 5.5.6 Control Sequences 5.5.7 Control Calculations 5.5.8 Failure Modes Level Instruments Weightometers Flow Instruments Pressure Instruments Temperature Instruments 5-4 5-4 5-4 5-5 5-5 5-5 5-5 5-5 5-5 5-6 5-6 5-6 5-6 5-6 5-7 5-7 5-7 5-7 5-7 5-8 5-8 5-8 5-8 6-1 7-1 8-1 9-1 9-1 9-3 9-5 9-6 9-7 9-8 9-10 9-10 9-12

5.5

5.6 5.7 5.8 5.9 5.10 6.07.0 8.0 9.0

VENDOR SUPPLIED PLCS EMERGENCY POWER SUPPLY PLC PROGRAMMING SCADA CONFIGURATION 9.1 General 9.2 Drives 9.3 Valves 9.4 Analog Variables 9.5 PID Loops 9.6 System Status 9.7 Piping Colours 9.8 Alarm Pages 9.9 Logging

APPENDICES Appendix 1 Vendor Control Philosophies

3036-PCP-001_0

December 2009 Lycopodium Minerals QLD Pty Ltd

LAS LAGUNAS GOLD TAILINGS PROJECT PROCESSCONTROL PHILOSOPHY – PLANT CONTROL PHILOSOPHY

Page 1-1

ABBREVIATIONS The following abbreviations / acronyms have been used throughout this document: ac Auto Client dc Engineer ESB FEL g/L HCl HDPE Hz I/O LCS LED LLL LOS LRS MCB MCC OIS OIT PCS P&ID PID PLC ppm PWM SCADA UPS VVVF Alternating Current Automatic Las Lagunas Limited Direct Current Lycopodium Minerals Pty Ltd Emergency Stop ButtonFront End Loader grams per litre Hydrochloric Acid High Density Poly Ethylene Hertz Input / Output Local Control Station (adjacent to the equipment being controlled) Light Emitting Diode Las Lagunas Limited Lock Off Stop Liquid Resistance Starter Motor Control Breaker Motor Control Centre Operator Interface Station (display and push button pad located in the field) Operator Interface Terminal...