Dust Agglomeration

No matter how effective a dry dust collection system is – eventually the dust has to be discharged from the system. This generally leads to a materials handling nightmare, or at best a waste of water to slurry the dust so that it can be pumped to slimes dams. Loedige’s KM series of Ploughshare^® mixers provides an alternative solution. It is now possible to micro-agglomerate the dust into fine prills with particles sizes of around 1 mm. This makes the material dust free, facilitating materials handling by conventional means such as conveyor belts or pneumatic conveyors. The material can now easily be recycled to processes or even dumped to landfill without dusting problems being a concern. The units can also be used to micro-agglomerate furnace feeds, such as flotation concentrates, reducing the loads on bag houses.

The effectiveness of the KM mixers at homogenising materials can provide an added advantage for applications in which the effective dispersal of additives, such as binders or reductants, is critical.

With machines being able to handle a throughput of up to 900m³/h, Loedige is able to provide solutions for most dust handling problems.

Range of Application

	Agglomeration of furnace feed		Converter dust
	Ashes with 400°C		Cupola dust
	Asbestos dust		Burdening dust
	Carbonation lime		Products of flue gas desulphurization
	Fly ash from waste incineration plant		Shaft furnace dust
	Fly ash from power stations		Dust from sintering units
	Fly ash from wood burning		Dust from sandblasting
	Blast furnace dust		Dust from cement bypass
	Foundry dust		Dust containing zinc

The following are some examples of successful applications

POWER STATIONS

	Micro-granulation of fly ash from power stations
	Transfer to trucks/ wagons as dust free, agglomerated product
	Non-clogging, self-cleaning mixer design
	Sizes up to a throughput of 550 t/h
	Stabilizing power station by-products
	Continuous process for high performance
	Quality mix with homogeneous product
	Machine sizes for 20 t/h to 850 t/h

WASTE INCINERATION PLANTS

	Immobilisation of residual materials containing hazardous substances
	Precision mixing with hydraulic binding agents in batch mode
	Hazardous materials are safely integrated in the solids matrix
	Treatment in closed circuit
	Self-cleaning machine
	Mixing process for changing environment-related residual material properties
	Reduction in the potential danger of residual material
	Lower dumping class entitlement
	Machines are easier to integrate in existing units
	Mixing processes for special waste to avoid peak loads in flue gas scrubbing
	Homogenisation of materials having high and low calorific value
	Provides more uniform waste incineration
	Emission peaks in flue gas scrubbing are reduced

STEELWORKS

	Shock cooling for slag and dust
	Rapid treatment through flush steaming
	Input over 650° C
	Discharge under 100° C
	Micro- or macro-granulated end material
	Unit for micro and macro granulation of dust from steelworks
	Consultation and engineering
	Mixing and dosing unit manufacture with measurement and control techniques
	Commissioning
	Mixing technology for micro and macro granulation of dust from steelworks
	Discharge of the product in free-flowing, non-slimy form
	Micro or macro granulated product
	Sizes for throughput up to 200 t/h
	Mixing granulation of iron slurry, ferrous oxide and iron dust
	End material can be reused for steel production
	Continuous process possible
	Granulate sizes can be controlled

Optional Equipment

	Highly wear resistant surfaces
	Heavy duty steels, stainless steels and special materials
	Chopper units
	Heated/cooled drum, endplates and shaft
	Equipment for liquid supply.

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