Treatment and sample preparation

Because of its inherent complexity, treatment of solids and of alternative fuels for subsequent analyses is subject to minutely detailed specifications. Obtainment of representative results is dependent directly on sampling, division, homogenisation and treatment. Selective sampling and the contamination of analytical samples must be categorically prevented.

Meticulous, multi-stage treatment in the mechanical process technology labs ensures that only suitable and representative samples are analysed.

Treatment of alternative fuels

Treatment of alternative fuels (here: domestic waste) using liquid nitrogen

Ever since the first alternative fuels (also referred to as secondary fuels or replacement fuels) were introduced, VDZ has supported the cement industry with laboratory services and  research projects on the subject.

Besides the customary materials, matter that is difficult to reduce in size, for example roofing fabric or car tyres, can be treated when required. Contact us to get individual advice and find out what treatment solutions we have for you.

  • Treatment of alternative fuels
    • primary size reduction in a shredder
    • finest comminution in cutting mill (< 1.0 mm)
    • ultracomminution in ultra-centrifugal mill (< 0.5 mm)
      e.g. scrap wood, waste oil, roofing fabric, commercial and domestic waste, rubber, sewage sludge, lacquer sludges, solvents, recovered paper stock and podsol, car and lorry tyres, plastic, rice husks, straw, animal meal
  • Drying and determination of moisture in drying cabinets (as per DIN EN 1097-5, DIN 51718 – method B, DIN EN 15414, DIN 51904)
    • for subsequent examination of heavy metals (e.g. mercury), the substances’ volatility is taken into account during drying and moisture determination
  • Drying in freeze-drying cabinets

Contact us to get answers for your specific questions.

Treatment of solids

Sampling from a BigBag CEM I 42.5R

Besides the treatment of alternative fuels, mineral solids are also reduced in size over several stages before further analysis. As is the case with alternative fuels, sampling, homogenisation and sample division are of key importance here, too.

Treatment of hard and brittle solids:

  • Primary size reduction (crushing, coarse grinding)
  • Finest comminution (grinding down to analysis fineness)
  • Sample merging and homogenisation
  • Sample division

e.g. iron oxide, ferrous materials, feldspar, fly ash, rock aggregates, blast furnace slag, lime-stone, clinker, coal, marl, petcoke, pozzolanas, quartz sand, sand, shale, clay and trass

Besides common mills, the following machines are also available for treating solids:

  • jaw crusher, disc grinder, coarse grinder, roller crusher
  • The following machines are available for homogenisation and division:
  • rotating sample divider, sample splitter, drum hoop mixer, tumble mixer, cross separator, vortex mixer

Taking representative samples is essential to obtaining meaningful analysis results and depends on numerous factors, e.g. particle size distribution, sampler and size of the sample. We can assist you starting in the early stages and offer advice on everything from planning sampling to interpreting the measurement results.

Contact

Dr Philipp Fleiger

Phone:
+49-211-45 78-254

Fax:
+49-211-45 78-400

Service offer

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Quality standards

The management system of VDZ gGmbH is certified by DQS in accordance with ISO 9001.

VDZ gGmbH is accredited by the Germany's National Accreditation Body according to DIN EN ISO/IEC 17025.

Quality standards

The management system of VDZ gGmbH is certified by DQS in accordance with ISO 9001.

VDZ gGmbH is accredited by the Germany's National Accreditation Body according to DIN EN ISO/IEC 17025.