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HOT Mining Tech Co Ltd --- Stack Sizer浩特矿业技术有限公司
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HOT HGZS Stack Sizer
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Preface Along with the advances of modern industry, the size of
enterprise is growing. As a result equipment of high efficient, high capacity and low energy consumption is required. This also applies to fine sizer, the effective size control equipment in classification operation. However, traditional fine sizer is a compromise between classification size and screening capacity and covers large floor area, which restricts efforts of enterprise in capacity expansion and efficiency improvement.
The development of stack sizer and polyurethane screen
resolved the contradiction between screening capacity and precision, and the problem of low area specific capacity of high frequency vibrating fine screen.
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Content
1. Introduction of stack high frequency vibrating fine sizer
2. Characteristics of non-blind abrasion-resistant urethane screen
3. Factors affecting screen selection4. Application case studies5. Scene photos and user list
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1. Introduction of stack high frequency vibrating fine sizer
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1. Stack high frequency vibrating fine sizer
Stack high frequency vibrating fine sizer (stack sizer) is such equipment of which a single driving source drives multiple screen decks to vibrate simultaneously. The effective feeding width of stack sizer is the sum of multiple single screens.
In stack sizer up to five screen decks is positioned one above the other and operating in parallel. Each screen deck completes separating independently and has separate undersize and oversize collection pan. The undersize/oversize collection pans discharge to two common outlet respectively.
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Similarities of stack sizer to single deck high frequency vibrating fine sizer – high frequency and small vibration amplitude
Such vibration is helpful to:• destruct the surface tension of pulp and the adhesion of fine
p a r t i c l e s o n c o a r s e p a r t i c l e s , a n d t o w e a k e n t h e agglomeration of fine particles due to Van der Waal’ force and electrostatic attraction. This is conductive to loose and layer material, and cause fine particles to separate and pass screen.
• accelerates the motion of fine particles, especially the dense valuable ore particles. This increases the probability of fine particles to contact and pass the screen, and promoted the classification.
• minimize and prevent screen aperture block, and improve separation efficiency
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Two vibrating motors supply the vibratory action for all five of the screen decks. This high frequency vibratory motion is uniform throughout the entire width and length of each of the screen decks.
T h e u s e o f d u a l v i b r a t i n g m o t o r s c r e a t e s a l i n e a r vibratory action by which an a c c e l e r a t i o n o f 7 . 5 G i s discharged on particles.
2. Mechanism of stack sizer
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Once the thin layer of slurry is introduced to the screen surface, the slurry is accelerated by the linear vibratory force.
This acceleration extends the effective fluidized zone of the mineral slurry, which enhances the separation over a larger area of screen surface.
The linear motion also conveys the screened oversize material out of the way of oncoming feed slurry so that more open screen area is available for the oncoming feed and classification efficiency is improved.
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2. Mechanism of stack sizer con.
3. Advantages of stack sizer
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1)Big screen area specific capacity Practical production indicated, when iron ore concentrate is
treated: area specific capacity is 9-10 t/m2·h at screen aperture 0.15 mm
area specific capacity is 8-9 t/m2·h at screen aperture 0.10 mm area specific capacity is 6-8 t/m2·h at screen aperture 0.08 mm
Area specific capacity of stack sizer is 1.5-2 times of single Electromagnetic vibration sizer
2) Big floor area specific capacity Stack sizer has greatest capacity at the same floor area coverage
comparing to other vibrating fine sizers. One 5-deck stack sizer is able to replace 3-6 single deck vibrating fine sizers.
At the same capacity stack sizer saves 1/3 floor area.
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3) Patented repulping system improves the capacity and quality of screening
Spray water is directed at repulping troughs located between the two panels on each screen deck.
Repulping system removes f ines f rom overs i ze to maximum extent.
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4) One pair of motors provides a uniform high frequency linear motion throughout the entire volume of all screen decks. This cannot be realized by electromagnetic vibrating sizer.
5) Screen frame surfaced by polyurethane, extending machine life significantlySurfaced by special modified polyurethane abrasion-resistant compound imported from US; not only anticorrosive but also abrasion-resistant. The abrasion resistance is 10-15 times of carbon steel. Life of Hot stack sizer is +8 years.
6) Low energy consumption (single machine power draw 4.5kW)
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2. Characteristics of non-blind abrasion-resistant polyurethane screen
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1）long life and abrasion-resistant • Polyurethane elastomer, well known as “super abrasion-
resistant material” and “liquid steel”, is a new synthetic material between rubber and plastic, with strong abrasion resistance, wide hardness range, high elasticity and tear strength.
• Therefore, polyurethane screen has a very lone life, which is usually several or several tens times of conventional woven wire screen. Generally the life of polyurethane screen is above 6 months, and can be up to 10 months in non-ferrous mine.
1. Characteristics of polyurethane screen
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2) Non blind aperture
• T h e h i g h e l a s t i c i t y o f polyurethane prevents HOT stack sizer from the adhesion of moist fine particles, ensuring the screen surface to be non-blind with near size particle. This advantage effect ively compensates for the slightly l o w e r o p e n a r e a o f polyurethane screen and gives it high classification efficiency.
• The inverted triangle cross-section of aperture resolved the problem of aperture blind both in theory and practice.
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3) High open area and area specific capacity Wire diameter down to 0.18mm and open area
up to 35%. Open area same to Derrick when aperture size is +0.15mm; only 3% lower than Derrick when aperture size is -0.15mm.
4) Energy Saving The light weight and low dynamic load of
screen not only minimize power draw and increase capacity of stack sizer, but also lead to improved efficiency, reduced machine running noise and improved working environment.
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2. Analysis of panel life and anti-blockingThree important indicators for screen performance:• Open area• Aperture size• Panel lifeThe life of screen panel is proportional to its wire cross section area. Bigger wire size gives longer life but smaller open area and capacity. On the contrary, smaller wire size brings bigger open area and higher separating efficiency but shorter life. Short panel life requires frequent maintenance and improves costs. Our screen panel wire size can be as fine as 0.18 mm but usually is 0.21 mm. Panel life is above 6 months and up to 10 months for non-ferrous ore.
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The life of polyurethane screen relates to its abrasion resistance and wire size. Generally, harder material has better abrasion resistance. But this rule does apply to polyurethane screen which is highly elastic.
In addition, the softer the screen wire is, the larger the deform of panel is and the harder to block screen aperture. Therefore, the 3 factors panel material, wire size/open area and hardness should be taken into account synthetically to ensure the performance of screen.
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3. Factors affecting screen selection
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The selection of screen has to consider:
1) Screening size and flowsheet2) Feed slurry flow rate and solid flow rate3) Target size fraction content in feedThe higher the target fine size fraction content in feed, the bigger the screen area specific capacity is. Usually is 70-75%
4) Fines in oversizeFines in oversize should be minimized and usually is 1/3 of that in feed. For Tin, tungsten poly-metallic ore it is required to be ¼.
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5) Near size particles in feedWhen near size particles content is high, screen area should be larger.
6) Selection of screen panelBoth of the material and tension of screen panel affect the capacity, efficiency and cut size of sizer.Stainless steel woven wire panel should select larger aperture size (usually 1.73 times)Polyurethane bar screen panel should select smaller aperture size (usually 1.5 times)
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4. Application case studies
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Typical applications and benefits1) Application of stack sizer in tin polymetallic mine2) Application of stack sizer in molybdenum
polymetallic mine3) Replace nylon fine sizer and spiral with HGZS-55-
1207 stack sizer in secondary grinding classification for iron ore
4) Application of HGZS-55-1207 stack sizer in Panxi vanadium-titanium magnetite grinding circuit
5) Replace electromagnetic sizer with stack sizer in Chengde
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1) Case study of stack sizer in a tin polymetallic mine (Guangxi Province)
Problem: Cassiterite is over ground but sulphide ore less ground
Solution: application of HGZS 3 decks stack sizer as classification equipment
Changes: %+0.15mm reduced from 36.36 to 29.22, %-0.074mm increase from 49.18 to 54.87; Benefits: Recovery of Sn and Pb are improved by 5% and 7% respectively.
Result: More than 30 HGZS stack sizers are applied in different tin polymetallic mines.
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2) Case study of stack sizer in a molybdenum polymetallic mine (Inner Mongolia) Problem: over ground Molybdenum ore, low concentrate grade and recovery
Solution: application of two HGZS 5 decks stack sizers as classification equipment
Benefits: throughput increased from 1300t/d to 1500t/d, recovery improved by 76% and 79% respectively.
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3) Case study of replace nylon fine sizer and spiral with HGZS-55-1207 stack sizer in secondary grinding classification for iron ore stack sizer (Aoniu iron ore mine, 2009) Problem: spiral and high frequency nylon fine sizer used in secondary grinding have problem of low classification efficiency, low capacity, being unstable and over-ground problem Solution: replace spiral and nylon sizer with HOT HGZS-55-1207Z stack sizerChanges: Classification efficiency reached 75%, -200 mesh in oversizer lower than 8%, circuit capacity increased by 15%; polyurethane panel life was 6+ months, which reduced cost of maintenanceBenefits: iron concentrate production increased by 14.5% .
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4) Case study of HGZS-55-1207 stack sizer in Panxi vanadium-titanium magnetite grinding circuit (An Steel Group Midi Operation)Problem: Along with the mining of deeper block, ore grade is decreasing. To keep product the throughput has to be increased.Background: Two kinds of high frequency fine sizers were used in Midi, namely GPS sizer and Derrick sizer.Solution: replace the two GPS sizers with HOT HGZS-55-1207Z stack sizer.Result: Comparison indicated that the efficiency of HGZS stack sizer is approaching to Derrick sizer. When -200 mesh in feed is 30%, the percent of -200 mesh in undersize is 60%. The life of Hot screen panel is similar to Derrick (4+ months), but the price is only half. Hot stack sizer brings >40M RMB to Midi operation. Over 130 Hot stack sizers were installed in the same mining area.
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5) Replace electromagnetic sizer with stack sizer in Chengde
Jianlong Company in Chengdu city installed two HGZS-55-1207Z stack sizers in May of 2012 preliminarily. After 1.5 months of operation, the overgrinding of iron concentrates were minimized and mill capacity was increased by 30%.
Based on th i s resu l t , a l l the prev ious 26 s ing le de c k electromagnetic sizers were replaced by Hot 5 decks stack sizer. As a result of mill capacity increase, 1 of 3 ball mill became spare mill. In addition to the 30% mill capacity increase, the moisture of iron concentrates is reduced by 2%.Comparison of stack sizer and electromagnetic sizer is as below:
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ID
Stack sizer
Solid feed flow rate
(t/h)
Feed concentr
ation
Feed size(-200
mesh）
Oversize fineness（-200 mesh）
Undersize
fineness（-200 mesh）
Classification
efficiency
Sand returning
ratio
1 32 17.81% 66.00% 24.00% 87.00% 87.88% 50%
2 67.8 32.78% 48.00% 13.00% 76.00% 87.96% 80%
3 87.3 39.43% 45.00% 13.00% 70.00% 87.33% 78%
4 78.9 36.70% 51.00% 17.00% 73.00% 86.90% 64.7%
5 112.4 46.80% 46.00% 18.00% 73.00% 80.79% 96.4%
6 160.5 43.31% 47.00% 21.00% 78.00% 75.70% 119%
7 100 44.00% 60.00% 21.00% 79.00% 88.53% 48.7%
8 102.3 26.80% 76.00% 44.00% 92.00% 80.70% 50%
9 91.45 37.75% 54.33% 21.00% 77.20% 85.37% 69.63%
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ID
Old electromagnetic sizer
Solid feed flow rate
(t/h)
Feed concentr
ation
Feed size(-200
mesh）
Oversize fineness（-200 mesh）
Undersize fineness（-200 mesh）
Classification
efficiency
Sand returning
ratio
1 22.50 43.54% 40.00% 36.50% 71.00% 18.01% 886%
2 22.08 42.73% 40.00% 35.00% 78.00% 22.67% 760%
3 23.97 46.39% 42.00% 34.00% 77.00% 34.11% 438%
4 18.68 36.16% 44.00% 28.00% 84.00% 54.55% 250%
5 20.00 38.71% 50.00% 36.00% 80.00% 50.91% 214%
6 21.77 42.14% 44.00% 38.00% 80.00% 25.97% 600%
7 18.12 35.08% 52.50% 31.00% 83.00% 65.37% 142%
8 21.01 40.66% 43.60% 34.70% 78.60% 34.42% 542
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5. Scene photos and user list
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1. HGZS-55-1207ZⅡStack sizer in Jinping Xinchi Mining
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2. HGZS-55-1007Z Stack sizer in Mengzi Mining & metallurgy
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3. HGZS-55-1007Z Stack sizer in China Kingho
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4. HGZS-55-1007Z Stack sizer in Yunnan Kun Steel Dahongshan operation
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5. HGZS-55-1007Z Stack sizer in Yunnan Jinghong Xinyi Mining
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6. HGZS-55-1207Z Stack sizer in Anning Fe-Ti Mine
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7. HGZS-55-1207Z Stack sizer in Sichuan Longmang Mine
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8. HGZS-55-1007Z Stack sizer in Pan steel Mining
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9. HGZS-55-1007Z stack sizer in Aoniu Hanwang Mine
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10. HGZS-33-1007Z stack sizer in Shougang Group Shuanglian Jianlong Mine
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List of part of usersUser Product Model Num
ber Date Ore
广西阳光大地矿业公司
Stack sizer HGZS-55-1007Z 4
2008.7
Tin polymetallic
Drum magnetic separator HCT-1018NB 4 Tin
polymetallic江西新海矿业公司
Stack sizer HGZS-12-1210N 12 2007.
1Tin
polymetallic江西省金龙矿业公司
Stack sizer HGZS-12-1210N 26 2007.
3Tin
polymetallic江西省恒鑫矿业公司
Stack sizer HGZS-12-1210 4 2007.5
Tin polymetallic
湖南省湘成矿业
Stack sizer HGZS-12-1210 4 2006.8
Tin polymetallic
云南个旧老厂锡矿
Stack sizer HGZS-33-1207Z 4 2006.
8Tin
polymetallic
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湖北省阿美矿业公司
Stack sizer HGZS-55-1207Z 1 2007.12 Iron
福建东华矿业公司
Stack sizer HGZS-33-1007Z 1 2007.1 Tin
polymetallic山东宏兴矿业有限公司
Stack sizer HGZS-55-1007Z 2 2008.4 Iron
新疆金源矿业公司
Stack sizer HGZS-55-1207Z 2 2008.9 Iron
内蒙古盛源矿业公司
Stack sizer HGZS-55-1207Z 2 2008.7
IronStack sizer HGZS-55-
1207Z 2 2010.4
云南腾冲县矿业公司
Stack sizer HGZS-55-1207Z 1 2008.7 Iron
内蒙古西部铜业 Stack sizer HGZS-55-1007Z 2 2009.3 Iron
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云南蒙自矿业有限公司
Stack sizer HGZS-55-1007Z 2 2008.8
Tin polymetal
lic内蒙古庆华集团矿业公司
Stack sizer HGZS-55-1007Z 2 2009.6 Iron
云南金平鑫池矿业公司
Stack sizer HGZS-55-1207ZⅡ 1 2009.7 Iron
云南省镇康矿业公司
Stack sizer HGZS-55-1207Z 1 2009.6 Iron
通化钢铁公司 Stack sizer HGZS-55-1007Z 2 2009.5 Iron山东黄金集团 Stack sizer HGZS-55-1207ZⅡ 2 2010.9 Iron
辽宁抚顺罕王集团
Stack sizer HGZS-55-1207Z 1 2009.7Iron
Stack sizer HGZS-55-1207Z 3 2010.9四川安宁铁钛公司
Stack sizer HGZS-55-1207Z 2 2009.12 Iron
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四川安宁铁钛公司
Stack sizer HGZS-55-1207Z 2 2009.1
2Iron
Stack sizer HGZS-55-1207Z 15 2011.1
福建龙岩铁坑矿业公司
Stack sizer HGZS-55-1007Z 1 2009.1
2 Iron
云南锡业集团
Stack sizer HGZS-55-1007Z 1 2009.1
2 Tin polymetalli
cStack sizer HGZS-33-1007Z 1 2010.8
云南红河诺邦矿业
Stack sizer HGZS-12-1007Z 2 2009.1
2 Iron
广西贺州东宝矿业公司
Stack sizer HGZS-12-1210 4 2010.1 Iron
山东沂南硅砂有限公司
Stack sizer HGZS-11-1007ZⅢ 4 2010.2 Quartz
sand内蒙古富贵矿业公司
Stack sizer HGZS-33-1007Z 4 2010.3 Iron
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云南新源矿业公司
Drum magnetic separator HCT-1018NB 4 2010.5 Iron
内蒙古额济纳旗长远选厂
Stack sizer HGZS-33-1007Z 2
2010.6 IronStack sizer HGZS-44-
1007Z 2
湖南巴陵冲铁矿 Stack sizer HGZS-44-1007Z 2 2010.6 Iron
新疆天颐和矿业公司
Stack sizer HGZS-55-1207Z 2 2010.7 Iron
广西南丹巨龙矿业公司
Stack sizer HGZS-33-1007Z 2 2010.8 Iron
四川龙蟒矿冶有限责任公司
Stack sizer HGZS-55-1207Z 1 2010.8
IronStack sizer HGZS-55-
1207Z 30 2011.1
云南昆钢大红山矿业公司
Stack sizer HGZS-55-1007Z 3 2010.9 Iron
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广东云浮金地东方矿业
Thickener GXN-600/55 600㎡ 2010.11 Prite
云南同乐矿业公司 Stack sizer HGZS-21-1007ZⅢ 1 2010.12 Tin polymetallic
新疆恒永兴Stack sizer HGZS-55-1007Z 1 2011.03
IronStack sizer HGZS-55-1007Z 6 2011.09
攀钢集团矿业
Stack sizer HGZS-55-1007Z 1 2010.11Vanadium and
titaniumStack sizer HGZS-22-1007ZII 1 2011.08Stack sizer HGZS-55-1007Z 27 2010.12
攀枝花明科Stack sizer HGZS-55-1207II 1 2011.05
IronStack sizer HGZS-55-1207ZII 2 2011.08
徽县平达 Stack sizer HGZS-55-1007Z 1 2011.08 Iron大冶新四方 Stack sizer HGZS-12-1210 2 2011.03 Iron
环宇集团Drum magnetic
separator HCT-1021ND 1 2011.04 Iron
勐海县新奕 Stack sizer HGZS-55-1007Z 4 2011.03 Iron盐边县千帆 Stack sizer HGZS-55-1207Z 1 2011.07 Iron英德鸿盛石英砂 Magnetic separator HLGC-1750 1 2011.1 Iron个旧易通 Stack sizer HGZS-11-1207ZIII 2 2011.05 Iron
个旧志达 Stack sizer HGZS-11-1207ZIII 1 2011.07 Iron48
宣城华通矿业 Stack sizer HGZS11-1207ZII 2 2011.07 Iron
个旧雄庆矿业 Stack sizer HGZS-11-1207ZIII 1 2011.07 Iron
攀枝花市汇杰工贸 Stack sizer HGZS-55-1207Z 2 2011.1 Iron
黄金集团中原矿业 Stack sizer HGZS-55-1207Z 1 2011.08 Iron
安徽浙商硅业 Stack sizer HGZS-11-1207ZIII 1 2011.08 Iron
黎埠寨塘选矿厂 Stack sizer HGZS-12-1207Z 1 2011.07 Iron
洛阳富川 Stack sizer HGZS-55-1207Z 1 2011.08 Iron
会理县鸿运Stack sizer HGZS-55-1207Z 1
2011.09Iron
Magnetic separator HLGC-2000 1 Iron
重庆恒岳 Magnetic separator HLGC-1500 1 2011.1 Iron
江西隆福Stack sizer HGZS-12-1207Z 1
2011.11 IronStack sizer HGZS-33-1007Z 2
贡山玉金铁矿公司 Stack sizer HGZS-44-1007Z 2 2011.11 Iron
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攀枝花市丰磊 Stack sizer HGZS-55-1207Z 1 2011.11 Iron
厦门宝拓 Stack sizer HGZS-55-1007Z 2 2011.11 Iron
济钢集团 Stack sizer HGZS-55-1007Z 2 2011.02 Iron
四川冕宁 Stack sizer HGZS-55-1207Z 2 2011.03 Iron
江苏和兴炉料 Stack sizer HGZS-55-1007Z 8 2011.05 Iron
寛城宝山 Stack sizer HGZS-44-1007Z 2 2011.05 Iron
中钢设备 Stack sizer HGZS-33-1007Z 18 2011.11 Iron
江西铜业公司 Stack sizer HGZS-55-1207Z 2 2011.1 Copper
南丹县五一矿 Stack sizer HGZS-44-1207Z 2 2011.1 Iron
郁南县华信码头 Stack sizer HGZS-12-1207Z 2 2011.11 Iron
湖南泡金山铅锌矿Stack sizer HGZS-11-1007Z 1
2011.11 IronStack sizer HGZS-12-1207Z 1
罗城仫佬族 Stack sizer HGZS-33-1007Z 1 2011.1 Copper tin
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七台河兴盛石墨矿 Stack sizer HGZS-55-1007Z 2 2012.6 Graphite Mine
包头市德顺 Stack sizer HGZS-55-1207Z 4 2012.5 Iron
阳县天健矿产 Stack sizer HGZS-55-1007Z 4 2012.6 Iron
攀钢集团矿业 Stack sizer HGZS-55-1007Z 16 2012.5 Vanadium and titanium
东源坚基矿业 Stack sizer HGZS-55-1007Z 1 2012.5 Iron
福建省德化鑫阳 Stack sizer HGZS-11-1007ZIII 2 2012.5 Iron
怀集乐居矿业 Stack sizer HGZS-55-1007Z 1 2012.5 Iron
三亚和利 Dewater screen ZZT-1836 1 2012.6 Iron
攀枝花市兴茂 Stack sizer HGZS-55-1007Z 1 2012.5 Iron
承德市双滦建龙 Stack sizer HGZS-33-1007Z 1 2012.6 Iron
攀枝花市浚豪 Stack sizer HGZS-55-1207Z 2 2012.4 Iron
湖南泡金山 Stack sizer HGZS-12-1210 1 2012.3 Lead and Zinc
七台河兴盛石墨矿 Stack sizer HGZS-55-1007Z 0.136 2012.42 Graphite Mine51
南丹县五一矿 Stack sizer HGZS-11-1007（II） 1 2012.4 Iron
大冶有色 Dewater screen ZZT-1836 8 2012.5 Copper
湖南临湘市钟杨 Stack sizer HGZS-11-1807III 1 2012.5 Iron
承德建龙矿业 Stack sizer HGZS-55-1207Z 6 2012.6 Iron
福建马坑股份公司 Stack sizer HGZS-55-1007Z 3 2012.6 Iron
五矿桂阳锡业 Stack sizer HGZS-33-1007Z 2 2012.5 Tin polymetallic
阿克塞海源矿业 Stack sizer HGZS-55-1007Z 4 2012.6 Iron
宽城宝山有限公司 Stack sizer HGZS-55-1207Z 12 2012.6 Iron
通钢板石矿业 Stack sizer HGZS-55-1007Z 2 2012.6 Iron
铜陵冠华 Dewater screen ZZT-1836 1 2012.6 Iron
武定万翔Stack sizer HGZS-11-1807III 2 2012.6 Iron
Stack sizer HGZS-55-1207Z 2 2012.6 Iron
池州鑫诚 Dewater screen ZZT-1836 1 2012.6 Iron
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承德天宝 Stack sizer HGZS-55-1007Z 2 2012.6 Iron
抚顺罕王毛公厂 Stack sizer HGZS-55-1007Z 4 2012.6 Iron
安徽冠华稀贵金属 Stack sizer HLGC-1500 1 2012.5 Iron
马来西亚某选矿厂Stack sizer HLGC-2000 1
2011.11 MalaysiaStack sizer HGZS-55-1207Z 1
印尼某选矿厂 Stack sizer HGZS-55-1007Z 2 2010.6 Indonesia
越南某选矿厂 Stack sizer HGZS-55-1007Z 2 2010.9 Vietnam
泰国某选矿厂Stack sizer HGZS-55-1007Z 8 2011.1 Thailand
magnetic separator HLGC-1750 2 2010.12
智利GONZALEZ EMPRESARIO公司
Stack sizer HGZS-55-1007Z 4 2011.1Chile
magnetic separator HLGC-2000 2 2011.1
盈聚国际 Stack sizer HGZS-55-1207Z 1 2012.5 Exported
新疆西部劲冶 Stack sizer HGZS-44-1007Z 1 2012.5 Exported
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THANK YOU 谢谢54
