The rapid developments within the telecommunications industry encouraged IST Telecom to embark on sourcing international suppliers of World-Class products. As a result we currently have formal distributorship agreements with a number of leading brands and provide solutions in the follwing areas:

Column Flotation

Delkor Technik (Pty) Ltd are manufacturing licensees for Canadian Process Technology (CPT), a wholly owned Canadian company. Column flotation is probably the biggest innovation the mining industry has seen in the last 50 years. It combines roughing and cleaning in one stage, it separates gangue particles which are entrained in the froth by a gentle water wash, and it has no moving parts.
Uses
   Sulphide mineral flotation
   Organic recovery
   Oil/water separation

Spargers
   Waterless
   Water assisted
   Porous

Advantages
   Superior Grade
The downward flowing washwater removes fine gangue particles entrained in the upward moving froth, before they reach the overflow lip. The removal of entrained gangue is responsible for the bulk of the grade improvements with columns.

   Operating Costs
Column cells have essentially no moving parts resulting in significantly lower operating costs compared to conventional flotation, in the order of 80% less. The major operating cost in a column is electrical power for the air compressor required for sparger operation.

   Lower Capital Cost
Column cells can have a lower capital cost than conventional flotation cells, particularly for larger sized units.

   Superior Control
The development of column flotation technology has allowed the introduction of sophisticated instrumentation systems to the flotation process. This in turn has resulted in superior control and improved stability compared to conventional flotation.

   On Line Inspection
The design of sparger allows the sparger to be removed and inspected without the shutdown of the cell, and without excess spillage
.

Linear Screen

The highly successful development of the patented Delkor Linear Screen has led to the use of over 500 units in all fields of process treatment around the world.

• Uses
  • CIP/CIL Plants
    • Trash removal
    • Desanding
    • Carbon safety
    • Loaded carbon desliming
      
  • Flotation
    • Trash removal
      
  • Milling
    • Cyclone replacement for mill throughput improvement and reduction in gold lock-up
      
  • Underground
    • Coarse particle removal in stope vamping
      
  • Effluent
    • Five trash removal after step screens
      
• Advantages of the Linear Screen - Trash removal
  • No Vibration
    The Delkor Linear Screen is designed to operate without any vibration. This has shown advantages in elimination of stress cracking on machinery and structural steel and civil/structural designs are considerably less expensive.

  • Cloth Life
    Wear life averages 3 to 12 months depending on the application. Cloth changes generally requires 20 minutes.

  • Low Power Consumption
    One tenth to one fifth that of conventional vibrating screens.
    

  • High Availabilities
    Availabilities generally exceed 99,0%.
    

  • Lower Maintenace Costs
    Less than 5% of capital cost per annum.

Delkor Jigs

We have developed a completely South African built gravity concentrator. It has a number of salient design changes from conventional jigs, these being :

• Mechanically pulsated from the bottom.
• Trapezoidal in shape.
• Lower water consumption.
• Unique drive mechanism.

The trapezoidal shape allows for the material to travel from the narrow end of the jig to the wide end, thereby reducing the water velocity as it travels over the jig, resulting in capture of fine particles which are normally lost.

The unique mechanism incorporates a variable speed motor driving a cam which imparts an even pulsation to the entire jig bed. The shape of the cam allows for lifting the bed quickly and controlling a slow downward movement to impart the suction necessary to draw the concentrate through the ragging. This mechanical drive system has reduced the amount of underwater previously necessary with subsequent decrease in fine concentrate losses.

Delkor filter Press

Delkor Technik have developed a locally manufactured range of Filter Presses after a thorough investigation of dewatering problems in South Africa.

The filter press is used extensively for mineral concentrates, chemical product and sewage sludge dewatering at pressure's between 6 and 15 bar. This method of dewatering is commonly used where conventional vacuum filtration cannot meet moisture requirements.

• Filter Press Range
  
  • Side - bar
  • Overhead beam
  • Manual plate - shifting
  • Automatic plate - shifting
  • 7 and 15 bar feed pressure
    
• Benefits
  
  • Local Manufacture
  • Robust Design
  • 1 000 mm Cake Discharge gap
  • In-situ cloth change
  • Plates easily removed
  • Ease of access for cloth / plate inspection
  • Backing plate and port liner

A state of the art digital ballistic fire control system is available as an upgrade for the T72 MBT. This enables the T72 crew to operate under all weather conditions. As part of the upgrade, stabilised sights are fitted for both the gunner and commander enabling them to track moving targets with the dual channel video autotracker during day or night conditions. Ballistic algorithms using vehicle and environmental sensors automatically calculates the required weapon offsets while the tank is static or on the move.

Thickeners



Delkor supply both conventional and high rate thickeners, and our vast experience in both these modes make us one of the market leaders in this field.

Our thickeners can be supplied with:

• Free standing or submerged tanks
• Hydraulic or electric drives
• Fully automatic positive rake lift
• Fully instrumented for automatic operation

Principle of high rate thickening

The principle is based on introducing a foculated feed in a horizontal direction into the thickener sludge bed. This feed principle eliminates the free settling zone present in conventional type thickeners and enables High Rate Thickeners to operate at rates from two to thirty times faster than conventional thickeners. The solution entering with the feed must move upwards through the foculated sludge bed and this action effectively filters out the ultra fines or unfoculated particles from the overflow (common overflow clarities are in the range 20 100 ppm). A fully integrated control circuit can also be supplied facilitating greater flexibility with respect to operation.

Thickener Animation

Auto Dilution Animation

Auto feed dilution

Delkor has developed a Jet/Venturi feed dilution system for optimisation of floculent usage.

The Jet Dilution uses the Jet Pump / Venturi design to induce large volumes of thickener overflow to flow back into the feed de-aerator/dilution tank. As there is no head to overcome between the thickener tank and the de-aerator/dilution tank, large volumes of dilution water are induced to flow with small volumes of higher pressure water. In most cases the dilute floculent solution can be used for this purpose.

Advantages are:

Control:
Dilution volume is controlled accurately by adjusting the Jet Volume. This allows a very accurate set point on the dilution/floculent usage curve. Mixing:
Early dilution in the de-aerator/ dilution tank allows for several floculent addition points in order to optimise slurry/floculent mixing.
Adjustment:
Dilution volume can be adjusted automatically depending on feed conditions.

Delkor has been at the forefront of the development of Horizontal Belt Filters for the mining and chemical industries for the past 16 years and we have installed some 12 000 m² of filtration area in the United States, Canada, Chile, Australia, Europe and Africa. The design of our belt filters incorporates a number of innovative ideas which simplifies operation and reduces maintenance costs.

High Filtration Rates

Belt filtration rates are generally 2 to 10 times greater than those achieved on rotary filters. The principle reasons for this are:

• Sedimentation of coarser particles onto the filter cloth.
• Filter cloth thoroughly washed by sprays.
• Drainage of filtrate is assisted by gravity.
• The size of zones can be varied.
• A wide range of feed volumes can be accommodated.

Drier Filter Cakes

When compared to boot feed type filters, belt filter generally achieve 1% to 5% better moistures:

This can be attributed to:

• Flexibility of drying zone.
• Gravity assisted filtration.
• Excellent filter cake discharge gravity.

Low Operating Costs

Several advantages exist in this area:

• No air blow requirements.
• No feed agitation required.
• Longer cloth life.
• Less operator attendance.
• Faster start ups and shut downs.
• Lower costs result from improved cake moisture.

Low maintenance Costs

Generally maintenance costs are in the region 3% to 4% of capital cost per annum.

The traditional method of electro-winning of gold onto stainless steel wool results in the loss of large quantities of Gold on an basis through the manual recovery of the metal from the wool.

EMD is the development of a hands free system for the electro-winning of primarily gold, as well as other precious metals and base metals.

The patented EMD system has evolved through the innovative use of suction to create high-speed transport of metal-containing solution through in-tank (submerged) cylindrical electro-winning cells. These rotating cells have a high surface area (HSA) cylindrical cathode constructed of stainless steel expanded mesh forms the outer (structural) wall of the cell. This anode is surrounded by filter sleeve. High capacity suction pumps draw the solution, in a radial direction, through the filter sleeve, the outer anode and the cathode towards the cell axis. Here the solution is sucked downwards and then re-circulated back into the tank compartment, to provide beneficial solution agitation therein

A number of cells are submerged in each compartment of an annular array of compartments, which constitutes the electro-winning tank. The incoming feed solution passes through these compartments following a serpentine path. The overall solution flow rate through the system is independent of the flow rate of the solution being re-circulated within each compartment. However, this solution flow is automatically manipulated so that entry point and exit point of the feed and barren solution, respectively, are periodically and systematically caused to progress around the arry to each compartment in turn. During this time the cathodes are partially loaded with metal that is electrodeposited on them.

At predetermined intervals, and again in turn, the current to each compartment, as well as the suction to the cells therein, are automatically switched off. Ultrasonic energy and water jets are automatically applied to the cathodes concerned, causing the deposited metal to be dislodged and washed away though a discharged valve which opens automatically. From here it is transported away for further treatment. The current and suction are then automatically restored, the discharge valve is closed, and electro deposition in that compartment is resumed. The same procedure is repeated in the next compartment, and so on, until the electro-winning operation is complete.

Delkor's experience over the past 15 years in the International Mining Industry has shown that floculent plant selection, design and specification is one of the most commonly neglected areas of liquid/solids separation equipment.

It is for this reason that we place maximum emphasis on safety factors and selection of reliable equipment for our plants. We have commissioned a number of Delkor Foculant Plants which have been running successfully for a number of years. Delkor Foculent Plants can either be supplied as an integral part of a liquid/solids dewatering circuit featuring other Delkor equipment, or as a complementary fixture to existing circuits.

Abel - Piston Membrane Pumps

     

bel GmbH & Co KG of Büchen, Germany, is a specialized manufacturer of piston and piston diaphragm pumps for the mining and mineral processing industry. 

The Abel piston diaphragm pump is excellently suited for the mining industry where it can be used for several high pressure slurry pumping applications. The piston diaphragm principle of our pumps ensure that very abrasive slurries and sludges can be pumped without wear to the main moving parts of the pump : the rubber diaphragm separates the slurry from piston, piston rod and cylinder liners which are consequently not any more subject to wear. Only the valves and diaphragms remain as wearing parts.

This construction principle ensures unsurpassed reliability, availability and a minimum of maintenance and operating costs. Abel pumps are equipped with a number of different protection and control measures (such as diaphragm positioning control and full stroke safety valves) in order to guarantee a maximum of availability.

Abel produces piston and piston diaphragm pumps :

Crankshaft piston diaphragm pumps: 
max. discharge pressure 250 bar
max. capacity 400 m³/hour

Hydraulically piston pumps :
max. discharge pressure 160 bar
max. capacity 103 m³/hour

These mentioned pumps can be used for the following applications :

-  Mine dewatering/desludging:
   pumping unsettled mine water from (for instance)
   1000 meters to surface in one stage

-  Ore transfer:
   transferring several types of ore through long distance
   pipelines at high concentration

-  tailings transfer:
   pumping waste materials through long pipelines at high
   concentrations.

-  Autoclave feeding:
   feeding ore slurries into high pressure vessels for
   processing of ore.

-  Back filling:
   transfer of highly concentrated tailings mixed with cement
   into underground mine stopes.

-  Other applications are:
   filter press feeding, digester feeding, fly ash transfer, etc.

Abel Pumps are currently being used for these applications at al large number of mine sites such as : Konkola (Zambia), Ashanti (Ghana), and many more all around the world.

Abel piston diaphragm pumps can be supplied with a number of different accessories, associated equipment and services such as complete drives, pulsation dampeners, commissioning and start up services, service contracts, etc.

The extensive experience of Abel Pumps with high pressure slurry pumping applications qualifies our company as one of the world's leading suppliers in this field.

Visit their website for more information: www.abelpumps.com
Abel Pumps brochure

COP Clarifiers

Belt Press

Delkor have been manufacturing Belt Presses for the wastewater and other industries for the past 10 years.

* The new Delkor/Klein Presses incorporate an open design, with removable stainless steel covers, that when installed, form an enclosed press. The access for both visual and repair inspections is unsurpassed by any competitor.
* The Delkor/Klein Belt press is manufactured in South Africa under licence from Klein Umwelltechnik GmbH Germany who have installed more than 3000 belt presses world wide.

Experience has shown that the Belt Press has an availability approaching 100% due to the robust nature and high specifications to which the Belt Press is constructed, and since maintenance downtime is usually planned outside the normal running hours. The only components subject to replacement are the wear items such as belt cloths that will require less than a few hours for replacement.

BENEFITS OF DELKOR OPEN PRESS DESIGN

Certain imported belt presses have recently become available in South Africa incorporating an enclosed design for odour control as a result of stricter environmental legislation in Europe. However under South African operating conditions, the operators rely heavily on visual inspection of the different press zones during operation, and that is impossible with the enclosed designs. The Delkor/Klein design incorporates easily removable stainless steel covers fitted onto the traditionally open design, giving an enclosed press with the maintenance and cleaning advantages of an open design.

Scat


Delkor are the marketing agents for the full range of SCAT Windrow Turners in southern Africa.

Oxygen is the key ingredient by which composting and soil bioremediation takes place. It is the catalyst for the aerobic process - the workhorse that turns unusable trash into usable compost and assists in transforming polluted soil into safe ground.

The patented Elevating Face of SCAT's line of Turners is the most effective way to introduce and trap oxygen into the material. SCAT's simple technology gently lifts, tumbles and drops material into windrows or stacks.

This thorough action processes all the material including ground level matter often missed by other turners. The result is the complete agitation and inversion of material allowing the biological process to do its best work.

There are a variety of Windrow Turners for varying duties; please contact Delkor for futher information.

Morbark


Delkor are the marketing agents for the full range of Morbark Tub Grinders in southern Africa.

Morbark have serviced the forest-based industries since 1957, and their dependable, heavy-duty equipment can be found around the world.

Their range of Tub Grinders are designed for:
* Commercial volume wood and yard waste disposal, reduction and recycling
* Fuel production from Slash, bark and flail debris

Applications by:
* Tree service companies
* Government entities
* Composting operations
* Military bases
* Contractors
* Forest products producers

Capabilities:
* Waste up to 200mm in diameter
* 30 to 300 cubic meters per hour depending on the model selected
* Effective as a secondary or primary grinder


For more information, visit their website: www.morbark.com

Turnkey Plants

Delkor has gathered vast experience in plant design and construction over the past 15 years, and this has put us in a favourable position to execute and manage Turnkey Plants Installations.

We have a number of Turnkey Plants plants to our credit which include:

• Goedehoop Colliery (AMCOAL) for Dewatering of fine coal
• President Steyn Gold Mine (AAC) for Underground Backfill
• Cooke 3 (JCI) for Underground Backfill
• ZCCM for Residue flotation plant
• Hecket Multiserv for Slag dewatering
• Foskor for Copper thickening and drying

Roller Screens

Ore Washers

Under Ground Systems

Turnkey Contracting

IST applies advanced, integrated technologies in the supply of sophisticated engineered systems and solutions to the Mining, Metals, Minerals, Manufacturing, Paper, Pulp, Petrochemical, Defence and Nuclear Industries in Southern Africa, Africa, the Middle East and selected international markets. IST Industrial, a division of IST Holdings (Pty) Ltd, has a long-standing and enviable reputation in the supply of turnkey fluid systems and is extending this reputation to projects focused on reducing the environmental impact of industrial processes.

De-SOx and De-NOx

Increasingly stringent legislation has resulted in vastly decreased limits for SOx and NOx emissions. IST Industrial is able to assist clients in meeting these limits through the implementation of either one or a combination of the following technologies:
· Semi-dry flue gas cleaning for SOx removal in power and incineration plant
· Single stage wet flue gas scrubbing for SOx removal in power plants
· Two-stage wet flue gas scrubbing for removal of SOx, HCl, HF and heavy metals in power and incineration installations.

· Selective catalytic reduction (SCR) for removal of NOx, Dioxin and Furans in power and incineration installations

· Selective non-catalytic reduction (SNCR) for removal of NOx
· Activated coke filter technology for the removal of Dioxin, Furans and Hg
· Paques biological BioDeSOx technology for flue gas desulphurisation producing elemental sulphur instead of gypsum.

Off-Gas Filtration

In anticipation of the new air quality act, IST through its alliance with GE Energy offers state-of-the-art technology for the reduction of particulate emissions. Engineers from IST cooperate with BHA Group GmbH to provide:

· Electrostatic precipitator technology (EPT)
· Wet Electrostatic precipitator technology (WEPT)
· Bag filtration technology
· State-of-art bag materials and coating selection
· New and retrofit installations of ESP’s and bag filters
· Upgrade and modernisation of ESP’s
· Conversions of ESP’s to bag filters
· Hybrid Max-9® filters combining the best of ESP’s with bag filters
· Real-time measuring and monitoring of off-gas quality
· Automated and optimised SO3 injection to enhance ESP performance

Water Recovery

South Africa is an arid country with limited water resources. Industry is highly dependant on this resource for continued production. As water has become more and more scarce in South Africa increasingly stringent water discharge quality criteria have been legislated and as is the case with any dwindling resource the price is bound to rise. Faced with these challenges it is becoming more and more viable for companies to recover and recycle as much of this commodity as possible. IST Industrial offers a number of technologies for industrial water recovery solutions either as stand-alone processes or in more complex combined process flow sheets. These technologies include:

· Biological removal of inorganic contaminants such as sulphate and nitrate using Paques technology
· Crystallization
· Neutralisation and precipitation
· Sand filtration
· Membrane processes
· Activated carbon
· Ion exchange
· UV and advanced oxidation technologies

Compressed Air

Compressed air is a crucial utility in virtually all industrial processes. Interruption in the supply of this utility may have extremely negative consequences on the process resulting in financial losses. IST Industrial is able to supply turnkey compressed air facilities based on:

· Leading air drying technology from locally manufactured energy-efficient heat-of-compression dryers developed in the USA more than 50 years ago and introduced to South Africa 15 years ago by IST
· Efficient plant layout and design of civil, structural, mechanical, electrical and control equipment
· In-house developed compressor control architecture and algorithms
· Instrumentation and Control systems designed to match the customer’s preference
· Industry leading efficiencies in terms of energy input to compressed air output.
· Advanced piping and reticulation design

IST Industrial executes projects on a turnkey multi-disciplinary basis from feasibility studies through detail design, procurement, construction, erection and handover including operational and maintenance support.