FILTRATION
FILTRATION
SOLUTIONS
SOLUTIONS
S
S
C
C
H
H
E
E
I
I
B
B
L
L
E
E
R
R
Polishing Filters
Polishing Filters
Scheibler Applications
in Mining & Metallurgy
Increasing requirements for higher product quality
from metal refineries have resulted in the need for
pure electrolyte streams requiring polishing filtration.
Scheibler Poli shing
Filter Applications
The increasing use of hydrometallurgy has also increased the need for
polishing filtration to recover valuable products from waste streams. Since 1971 Scheibler Polishing filters have earned a reputation for delivering better process performance, reliability and low operating costs. The applications in which Scheibler
polishing filters are used include:
Metallurgy
Copper refineries
Electrolyte recirculation •
Electrolyte decant after de-anoding •
Anode slimes plant electrolyte •
return
Anode scrap wash water •
Cathode wash water • Wastewater treatment • Zinc refineries Solution purification • (Cu, Ni/Co, Cd, Sb)
Wastewater treatment (precipitated •
heavy metals recovery) Nickel & cobalt refineries
Neutral Solution Clarification •
Barren Liquor Clarification •
Solution Purification •
(Fe, Zn, Cu, Al, Mn)
Electrowinning solution polishing •
(catholyte and anolyte)
Gold/silver merrill crowe plants PLS clarifier overflow
•
Post precipitation Au/Ag recovery •
Metal concentrates
Wastewater treatment (precipitated •
heavy metals recovery) Recirculation of process water •
Product Description
The Scheibler filter is used for the removal and recovery of solids in low concentration from process liquids. The quality of the resulting filtrate
increases production capacity while boosting the quality of plant and refinery products.
Scheibler filters exploit the
phenomena of adsorption filtration to cause micronic and sub-micronic particles to adhere to the fibers of the filter media, despite being small enough to pass through its pores. This activity reduces particle concentration in the filtrate to almost undetectable levels. Filter aids, such as precoat and body feed, are unnecessary in the vast majority of applications, but if required the filter can be operated with filter aids without modification. All models feature a unique fully programmable cloth cleaning and cake discharge system. With
filtration areas of up to 720 m2
available, process flow sheets can be simplified by installing a reduced number of filters. Scheibler filters are manufactured in materials resistant to highly corrosive solutions and high process temperatures.
Thousands of filter installations worldwide: Copper electro-refining • Zinc refining • Nickel refining •
Gold/silver merrill crowe process •
Cu, Zn, Ni/Co solvent extraction •
feed solutions
Cu, Zn, Ni, Co electrowin •
electrolytes
Manganese dioxide electrolytic & •
chemical refining
PGM/Base metal refinery solutions •
Concentrator or refinery waste water •
Bene
fi
ts
ScheiblerASeries ESeriesfnalassembly
E series elements
High Quality Filtration
Adsorption filtration reduces particle concentrations to a level of parts per million. Production capacities increase, as do the quality of plant and refinery end products.
Low Operating Costs
Costly filter aids, such as precoat and body feed, are unneccessary in the vast majority of applications. This also considerably reduces the volume of total cake solids disposed in the environment. Low electrical energy consumption is another cost-saving benefit, as the adsorption filtration uses very low pumping pressures.
Minimal Maintenance Cost
With no moving parts, the operating cost typically equates to 1.25 cents
(US) per m3of filtrate produced.
The unique cloth cleaning and cake discharge system ensures maximum
cloth lifetimes. Normally the filter is only opened periodically to replace filter cloths.
Fully Automati c Operation
Automatic (PLC) control of the cloth cleaning and cake discharge steps at the end of each filtration cycle ensures maximum filtration time in subsequent cycles. This also cuts manpower requirements by eliminating the need for frequent supervision.
High Capacity, Compact and
Expandable
All Scheibler filters occupy little building space. Flow rates as high
as 600 m3 /hr can be consistently
handled by a single unit, greatly simplifying the process. Most units are designed with expension capability, economically accommodating growing capacity requirements.
Typical Applications
Thickener/ clarifier overflows •
Solvent extraction and electrowin •
feed solutions
Pressure & vacuum filter filtrates • Centrifuge centrates • Prior to crystallisation or • precipitation
Inorganic pigment recovery •
1. Filtration
During normal operation the slurry is fed into the filter vessel through the process inlet by a centrifugal pump. All Scheibler filters are rated for process pressures of 300 kPa and feeding systems are designed to maintain laminar flow within the vessel to ensure adsorption filtration.
2. Draining
In the beginning of the cloth cleaning and cake discharge cycle the filter liquid level is drained to the top of the filter elements.
3. Air Agitation
In the agitation phase low pressure air is fed to the filtration vessel through a manifold below the filter elements. This causes vigorous bubbling and scouring of the filter cake attached to the filter cloth bag. During agitation the filter cake is removed from the filter cloth bag, and effi cient mixing causes the filter cake to be re-slurried.
4. Drain with Backwash, Wash Spray
and Air Agitation
In this phase the filter vessel is drained through the outlet. Simultaneously, the filter cloth bags are backwashed and sprayed on the outside while air agitation continues.
5. Drain with Wash Spray and Sluice Spray
During the final draining phase the lower air sparge continues to keep the re-slurried filter cake in suspension while the lower sluice sprays direct solids towards the drain outlet, ensuring complete cake and slurry removal until the filter vessel is empty.
6. End of the Cleaning Activit y
(Cleaning Complete)
The cleaning sequence is complete, when all cake has been removed, The unit is ready for filtration.
7. Re
fi
lling Vessel for Filtration (Restart)
With cleaning complete and all valves closed, slurry pumping resumes.
Operating Principles
Slurry Filter cloth Filtrate Wash filtrate Wash liquid Solids Air Vacuum Athmospheric air 1. Filtration 3. Air agitation 5. Drain with wash spray and sluice spray6. End o the cleaning activity (cleaning complete)
7. Reflling vessel or fltration (restart)
2. Draining
4. Drain with
backwash, wash spray and air agitation
Scheibler E series solution or purifcation
Comprehensive
Design Assistance
Let Larox help you design
the optimum filtration
plant for your process.
Our services include: • Application consultancy • Filtration testing
• Filter and ancillary sizing • Plant layout concepts
WE CONTINUE
TO SUPPORT
YOU WITH OUR
COMPREHENSIVE
GLOBAL AFTER
SALES SERVICE.
Drawings: • General arrangements • Foundation • P&I diagrams • PipingFixed Position Nozzles
and Pipework
All process pipes are connected to nozzles on the non-moveable head unit, leaving the opening access shell free to roll easily aside. The wet cake is discharged as a slurry through the drain line enabling easy cake handling.
Automatic Flange
Locki ng System
The automatic flange locking system is designed for simplified vessel maintenance and cleaning. With less bulky tapered main flange profiles, this optional hydraulic vessel closure method speeds up routine maintenance and offers swift access to vessel internals. Once the main flanges are open, the shell ends are retracted by hydraulic cylinders.
Scheibler Polishing Filters
Retractable Shell
The movable shell slides easily on steel wheels and rails, automatically disconnecting and withdrawing the overhead wash spray manifold. During routine maintenance this also allows easy access to check the spray nozzle.
Expandable Filters
If greater filtration area is required for growing process throughput most Scheibler double flange D and E series filters can be be expanded with additional elements and internal manifolds. A Series filters also have a flexible combination of element frames that can be configured for expansion.
Rectable shell
Rigid Element Frames
Standard AISI316L steel frames
support the filter media cloth bags
with separation chains or springs
providing full span support and
a permanent exit route for the
filtrate. Other corrosion resistant
materials, such as SAF2205, SMO254
and titanium, are available to meet
process requirements.
Wide Range of Convenient
Filter Vessel Formats
Different plant and process
conditions are catered for with a wide
variety of sizes in four filter vessel
configurations. The long-established
C Series rectangular vessel is also
still available, up to a maximum of
120 m². This compact design, which
features a top opening access lid, is
suitable for flow rates between 10
to 80 m³/h in situations where floor
space is limited.
Larger flows are catered for with
the D and E Seriesof horizontally
mounted cylindrical vessels. Flow
rates of 50 m
3/h to 600 m
3/h can
be handled, and all filter sizes are
available in a comprehensive range
of corrosion resistant materials,
including rubber-lined vessels
with titanium or C276 internal
wetted components. The vertical
through floor cylindrical A Series
features a conical base that serves to
concentrate discharge slurry.
Pressure Vessel Codes
Most of the national and international
pressure vessel codes are available
in Scheibler filter pressure vessel
construction, including ASME IIIV Div
1, PED 97/23 EU, A.D Merkblatte, AS
1210, PRC M, stamp.
Scheibler C series Scheibler E series
Scheibler
A Series Filters
A Seri es A4/ 6 A6/ 6 A6/ 10 A10/ 10 A13/ 15 A15/ 15
Effective filter area m2 30 45 60 90 160 175
Number of elements 4 6 6 10 13 15 Height mm 3 140 3 438 3 991 Weight kg 2 234 2 373 2 513 2 652 2 791 2 931 Width mm 1 310 1 580 2 040 Diameter mm 1 108 1 380 1 812 Inlet diameter mm 80NB 100NB 150NB Max working pressure kPa 300
Wash water m3 /cycle 1.1 1.3 2.0 2.9 4.9 5.2
Process air Nm3 /cycle 40 56 75 107 176 192
The A series produces higher cake solids concentration (% w/w) than C, D and E Series polishing filters as the cake solids settle in the conical bottom with multiple filtration cycles for each wet cake discharge.
Greater capacity for higher feed solids concentration (% w/w) than C, D and E Series polishing filters as the specialized pulsed cloth cleaning sequence enables shorter cloth cleaning cycles (reduced dead time). Cost-effective design results in maximum filtration area for vessel size. Requires minimal installation space due to vertical through floor vessel configuration.
Employs the same adsorption filtration principle as in C, D and E Series polishing filters.
Large flow rate capacity
These truly giant polishing filters can
handle flows up to 800 m³/h when
configured to operate with filter aids
and as high as 600 m³/h in standard
adsorption configuration. Maximum
achievable flow rates are established
during in-process testing or are
based on our wide-ranging process
information data base built up from
experience in over 1500 installations
worldwide.
Cost effective construction
Scheibler E Series filters range from
200 m² to 720 m² in filtration area.
The larger horizontal cylindrical
configuration generally requires small
Scheibler ESeries Filters
Scheibler D Series Filters
Scheibler DD Series Filters
crane/hoist availability for routine
element changes. The fixed head unit
is double flanged for expandable
options and features easy retracting
shell coverings. Automated shell
retraction systems are available for
diffi cult processes, that require frequent
opening.
Expandable to meet new demands
The largest unit in the series, the
Scheibler E36/36 features thirtysix
20 m² elements with Quadrex* cloth
(18 per side). Smaller units, such as the
Scheibler E28/36, can be expanded
from 560 m² to 720 m² with an
insertion of 8 extra elements and a
corresponding movable shell.
Single flange Scheibler D Series
filters offer filtration areas ranging
from 80 m² to 180 m². The horizontal
cylindrical configuration enables easy
maintenance access from floor level.
The fixed head unit enables permanent
connection to process pipework and
Scheibler DD Series filters offer filtration
areas ranging from 80 m² to 360 m².
The familiar horizontal cylindrical
configuration features a double flanged
fixed head unit for expandable options
and easy retracting shell coverings.
The largest unit in the series, the
Scheibler D36/36 features 36 x 10 m²
elements with Quadrex* cloth per side.
Smaller units, such as the DD24/36, can
has an easy rolling retracting shell
covering.
Economical design format
These medium-sized units offer good
capacity in an economical vessel
design.
be expanded from 240 m² to 360 m²
with an insertion of 12 extra elements
and corresponding movable shell.
Automated shell retraction systems
are available for diffi cult processes
where rapid access is needed. All
Scheibler polishing filters are available
with insulation and electrical heating
wraps as factory fitted options.
ESeri es E12 E16 E20 E24 E28 E32 E36
Effective filter area m2 240 320 400 480 560 640 720
Number of elements 12 16 20 24 28 32 36 Length mm 3 149 3 629 4 104 4 584 5 064 5 544 6 024 Weight kg 6 293 6 804 7 389 7 901 8 412 8 924 9 435 Width mm 2 900 Height mm 3 541 Inlet diameter 200NB 250NB 300NB Max working pressure kPa 300
Wash water m3 /cycle 8.5 10.7 13.2 15.4 17.6 19.7 21.8
Process air Nm3 /cycle 250 290 330 370 410 450 490
D Series D8 D10 D12 D14 D16 D18
Effective filter area m2 80 100 120 140 160 180
Number of elements 8 10 12 14 16 18 Length mm 2 074 2 274 2 474 2 674 2 874 3 074 Weight kg 2 234 2 373 2 513 2 652 2 791 2 931 Width mm 1 976 Height mm 2 541 Inlet diameter mm 100NB 150NB Max working pressure kPa 300
Wash water m3 /cycle 3.9 4.6 5.3 6.1 6.8 7.5
Process air Nm3 /cycle 100 110 130 140 150 160
DD Seri es 20 22 24 26 28 30 32 34 36
Effective filter area m2 200 220 240 260 280 300 320 340 360
Number of elements 20 22 24 26 28 30 32 34 36 Length mm 3 248 3 448 3 648 3 848 4 048 4 248 4 448 4 648 4 848 Weight kg 3 131 3 307 3 446 3 725 3 864 4 004 4 143 4 282 4 422 Width mm 2 029 Height mm 2 541 Inlet diameter mm 150NB 200NB Max working pressure kPa 300
Wash water m3 /cycle 8.5 9.2 9.8 10.5 11.2 11.9 12.6 13.3 14 The technical data is subject to change without notice.
Performance for Life
Larox provides its customers with an unrivalled
combination of process expertise and service. Larox
delivers complete filtration solutions, which exceed the
customers’ expectations. Larox offers a comprehensive
Performance for Life service concept for its filtration solutions.
Larox’s customer-centered services begin with strategic lifecycle planning already at the investment phase. A nominated customer support engineer handles each project together with the project manager, providing a familiar and reliable point of contact for the customer throughout the entire lifetime of the filtration solution. Start-up and training services ensure optimal performance, while reliability is maintained
through spare part services, service agreements and maintenance support. Filter performance can be further enhanced through process optimization and modernizations. Finally, Larox offers refurbishment and relocation/resale services that maximize the value of the original filtration investment.
Larox’s mission is to work together with its customers on a day-to-day basis to achieve their system
and process objectives for the entire lifetime of the solution. To support customers in achieving competitiveness in their business, Larox helps them maximize availability, minimize operating cost and optimize process results. The Performance for Life service
concept developed by Larox has proven to be an optimized, cost-effective and high-quality approach that meets the individual needs of customers.
• Safety
• Reliabil it y
• Sustainability
• Process Results
Testing for
Optimal Results
Larox offers a versatile range of test filtration
services. After each test the client receives
a detailed report, quantifying the technical
and economic benefits of the Larox solution.
Bench Test Filters
Our bench test pressure and vacuum filters are used for preliminary
screening and when only a limited amount of slurry is available. These test filters are also available to clients who wish to perform regular tests on their slurry.
Laboratory Filters
Our laboratory pressure and
vacuum filters simulate the process at the client’s production site on a smaller scale. All process and cost benefits of the application are projected with reliable,repeatable test results that can be used for filter sizing.
Pilot Filters
Larox test engineers work closely with the client’s personnel to conduct test filtration for full-scale process evaluations on site. Pilot units can be connected directly to the client’s filtration process. Larox has a range of pilot filters for pressure, polishing, capillary action vacuum, and vacuum belt filtration to meet all possible process requirements. Pilot testing typically takes place after laboratory scale testing.
Test Reports
Larox testing produces dewatered solids and filtrate samples using slurry obtained directly from the client’s process. Larox test reports indicate the most appropriate filter type and potential process improvements. Testing can be conducted at the Larox Research Center or at the client’s facilities.
Research
The Larox Research Center evaluates test results and advises test engineers on the best methodology for each process. The Research Center continuously updates the testing equipment to ensure accurate results. It also maintains the Larox Databank, a source of information on over 10 000 filtration tests.
Larox Automation System
Complete Filtration
Plant Control
The Larox automation system automates, optimizes and visualizes the entire filtration process, allowing filtration plant operators to achieve better filtration performance and cost-effi cient operations with minimal intervention.
Larox automation solutions include plant floor level automation for all filter types, as well as corporate-wide visualization, real-time reporting and availability analysis of the filter plant. All Larox automation solutions are based on the same proven architecture with modular functions customized to each instalation. The system provides plant
operations, maintenance and management with the data, condition monitoring information, reporting and visualization needed to keep both equipment availability and production costs on target.
Modem or web-based remote support from Larox’s experienced local or global service team helps ensure continuous automated operation.
• Fully automated
fi
lter
plant control
• Electrical and
instrumentation
engineering
• Process control and
optimization
• Real-time data
acquisiti on, analysis
and visualization
• Control room, local
area network, and
web-based reporting
• Seamless integrati on
with of
fi
ce software
• Advanced real-ti me
diagnostics
• Remote access for
comprehensive support
• Conti nuous product
improvement during
product li fecycle
With experience in designing fully automatic
equipment for over 30 years, Larox is the undisputed
leader in filtration automation. The Larox solution
today goes far beyond the simple automation of
functions.
Sisu
People to People
Progress
The Larox Group Advantage
Experience. Technology. Products. Service. People.
Unrivalled Appli cation
Experi ence
With extensive application experience within the industry, Larox provides optimal solutions for clients’ filtration needs. From bulk mined products and metal concentrates to metallurgy, the experience of Larox provides the assurance that every application will perform to specification and operate to budget.
Leading Technologies
All Larox members are technology leaders in their own right, with proven track records in translating research and development into solutions that deliver superior process results with increased capacity, system reliability and total cost-effi ciency.
World-Class Product Portfolio
Larox brings together the innovative products of Larox, Hoesch, Pannevis, Ceramec and Scheibler. With this extensive range of filtration products, Larox can specify the optimum solution for virtually any mining or metallurgical application. The Larox portfolio extends beyond products to filtration plant design assistance and ancillary selection.
Larox Service
-Performance for Life
Larox’s global after-sales service ensures continuously high equipment and process performance. Process optimizations, preventive maintenance, operation and maintenance training, total productivity improvement and product-upgrade services are just a few ways in which Larox Service supports clients for the life of their solutions.
Larox People
Larox is built on the expertise, talent and skills of each employee. Many Larox employees have worked in the mining and metallurgical industries and understand their needs.
Worldwide, the Larox personnel pool their experience and partner with the Larox clients to develop the optimal solution for their needs.
Further information on Larox and its products, downloadable brochures, data sheets and application case studies are available at www.larox. com and from your nearest Larox representative.
Larox Corporation P.O. Box 29 FI-53101 Lappeenranta Finland Phone +358 20 768 7200 Fax +358 20 768 7277 E-mail [email protected]
www.larox.com
Sertified Quality System SFS, Certificate No 1398-05. Compiles with the requirements of standard SFS-EN ISO 9001 Copyright @ 2008 Larox Corporation. All rights reserved. Larox is a registered trademark of Larox Corporation.
