国外大型半自磨机的设计理 念和比例放大规则
选矿工艺：
碎磨, 浮选， 磁选， 重选
碎矿
粗碎
中碎
细碎
球磨机
磨矿分级
磨矿分级
自磨机
自磨机磨矿原理
分级
新给矿
fi
破碎过程 返回料
排矿
pi
格子筛
高比能 低比能
矿浆
半自磨机磨矿原理
Shoulder Region
Ball Drop Height
Rock
MOUNT ISA MINES LTD COPPER CONCENTRATOR
AG 02
Grinding and Flotation Flowsheet From January 1998
Media and reagent usages given are with respect to the total plant feed
SAG/Auto Mills
Mill Aspect Ratio (D/L)
High (1.5-3)
Square (1/1)
Low (1/1.5 – 1/3)
瑞典AITIK 铜金银矿山
瑞典AITIK 铜金银矿山选矿流程
自磨+砾磨
澳大利亚世纪锌矿
澳大利亚世纪锌矿
Cyclones SAG Mill 36’ x 16’ (10” 2 clusters x 24) ROM Hopper
Sand Grinders (15)
Zinc Cleaner 2 Tank Cells (14)
Zinc Cleaner 4 Tank Cells (8)
Zinc Thickener
澳大利亚世纪锌矿
(S)AB 流程：
Flotation / leach
SAG mill
Ball mill
澳大利亚世纪锌矿
High fillivering EGL 2 world class solutions to the minerals industry
Low filling
SAG/Auto Mills
SAG Mill and Discharge Trommels
Lead Storage Tanks (1)
Cyclones (2” 20 clusters x 16) Conditioners (2)
Zinc Cleaner 3 Tank Cells (8)
Zinc Cleaner 5 Tank Cells (6) To Pipeline Zinc Storage Tanks (3)
Process water 15 l/s
09 Ball Mill
05 Ball Mill
Process water 10 l/s
700 tph P80 = 0.060 mm
球磨：6.7 MW
半自磨：12 MW
F80 = 80 mm
澳大利亚蒙特艾萨铜选厂
澳大利亚蒙特艾萨铜选厂
N
Line 2 Primary Grinding Spillage Cyclones Scat return Water jet 25 l/s BALL MILLS Rated Power 2750 kW Power Draw 2500 kW Size D=5m L=6m Speed 13.99rpm 70% Allis - Chalmers 65mm Balls 0.65 kg/t Line 1 PLANT FEED PLANT FEED Target Milling Rate 680 tph Scat return Water jet 25 l/s REGRIND CYCLONES 7 D10B Krebs cyclones in "cyclopak" arrangement 6 - 7 operating Inlet diameter = 55 mm Vortex finder dia. = 76 mm Spigot dia. = 51 mm o Cone angle = 20 Regrind Mill Bypass Primary Cyclones Process water 12 l/s Process water 10 l/s PLANT FEED
Primary Sizer
Ball Mill 20’ x 32’ Stockpile
PASMINCO CENTURY MINE Pb Rougher
Flotation Screen (2.4m w * 6.1m l) Oversiz e to waste dump
Pb Scav. Tank Cells (4)Tank Cells (2)
Zinc Rougher Zinc Scavenger Tank Cells (7) Tank Cells (11)
Tailin gs Thick ener Cyclones (6” 2 clusters x 20) Lead Thickener
Tailings Dam
Prefloat Rougher Tank Cells (7)
SAG/Auto Mills
磨机参数
• • • • • •
.au
Mill Dimensions 尺寸 Mill Speed 转速 Mill Load/Ball Load 充填率 Mill Power 功率 Ball Size 球径 Lifters 衬板
Delivering world class solutions to the minerals industry
Pb Cleaner 1 Tank cells (3)
Conditioner
Zinc Cleaner 1 Tank Cells (6) Conditio ner
Cyclones (6” 2 clusters x 20)
To Pipeline
Pb Cleaner 2 Tank cells (2)
Zinc Regrind (6)
Impact Zone Toe Region
Attrition Zone
SAG/Auto Mills
自磨，半自磨
SAG/Auto Mills
Mill shapes
Conical ended mill
Flat ended mill
SAG/Auto Mills
Effective Grinding Length (EGL)