Dyestuff & Pigments - Spray drying involves the atomisation of the
dyestuff and pigment feedstock into a spray of droplets.
TYPICAL SPRAY DRIED DYESTUFFS AND PIGMENTS:
- Acid dyes
- Azoic dyes
- Barium sulphate
- Basic dyes
- Cadmium carbonate
- Cadmium sulphide
- Calcium carbonate (and
- Ceramic colorants
- Disperse dyes
- Dyestuff intermediates
- Iron oxide (black, red, yellow)
- Lead chromate (chrome yellow)
- Lead molybdate
- Reactive dyes
- related fillers
- Titanium dioxide
- Zinc chromate
- Zinc potassium chromate
Spray drying involves the atomisation of the dyestuff and pigment feedstock
into a spray of droplets, and bringing the spray into contact with drying air.
Feedstocks can be in solution, suspension or paste form.
industry Niro offers a broad range of technical solutions and tailor-made
applications to meet the specified product property requirements, such as
free-flowing characteristics, powder granulometry, low dustiness and
The range of plant concepts includes
spray dryers, FSD dryers, IFD dryers, fluid beds for agglomeration /
granulation and mechanical granulation.
The recipe of many dyestuffs
and pigments includes hazardous organic ingredients representing risk of fire
and dust explosion or environmental pollution due to toxic or active emissions.
Today's environmental restrictions require a more complex design
depending on the type of product, powder form, residual moisture content in the
final dried product and/or toxicity properties.
Niro has successfully
developed and supplied a number of process plants designed to meet the
requirements of our customers and the local authorities requirements such as:
- Open, environmentally friendly plants with highly effective components
ensuring exhaust of clean process air
- Semi closed plants utilising low oxygen combustion gas as process air
- Semi closed plants, selfinertised and featuring incineration of exhaust air
- Closed cycle concept with Nitrogen purged process gas circuit
Cleaning-in-place (CIP) systems, semi- or fully automatic, are available for
all Niro plants.