Carbolite Ashing and Burn-off Furnaces

Introduction

For heating of combustible materials for material removal or analysis of ash residue, Carbolite has developed the ashing and burn-off range, which have specific features to enhance ventilation and maintain good temperature uniformity, as well as protect the sample from contamination.

Laboratory furnaces must fulfil many preconditions to meet all the requirements of heating your samples efficiently and reliably. Amongst others these include being tough enough to withstand mechanical wear and tear, and resistance to aggressive substances, as well as providing good temperature uniformity throughout the chamber.

If the sample being heated is combustible, and your requirement is to burn away that material to leave the workpiece clean, then resistance to mechanical wear and tear and good ventilation to remove the ignited fumes are most important.

If the sample being heated is combustible and your interest is in the ash remaining, then resistance to mechanical wear and tear, resistance to aggressive substances and good temperature uniformity are all important characteristics.

If the sample being heated must not be contaminated by alumina or silica dust, then the use of a furnace with a dust-less chamber is important.

If the sample being heated is non-combustible then the most important characteristic is to achieve consistent uniformity.

To assist you with the selection of the most appropriate furnace please refer to the table below.

For typical heat treatment processes carried out in the laboratory Carbolite has developed the general purpose chamber furnace range.

Burn-off and removal of material for cleaning

Natural fibres, wax

Please refer to the
CWF/BWF section

Hydrocarbons

Please refer to the
AAF section

Ashing for material analysis

Natural fibres, foods

Please refer to the
CWF/BWF section

Natural fibres, foods, Animal fats, Hydrocarbons

Please refer to the
AAF section

Natural fibres, foods, Animal fats, Hydrocarbons, H₂SO₄/HNO₃/HCL

Please refer to the
GSM section

Ashing for material analysis in a dust free chamber

Natural fibres and foods, Animal fats, Hydrocarbons, H₂SO₄/HNO₃/HCL

Please refer to the
GSM section

Heat treatment of non-combustible material

Metal or ceramic

Please refer to the
general purpose chamber furnaces

High quality insulation for wear and tear resistance
Vertical parallel door movement keeps door insulation away from operator
Compact outer dimensions saves bench space
Natural convection ventilation extracts fumes fast
High grade heating wire mounted in ceramic plates for fast heating or
High grade heating wire mounted behind liner to protect against carbon or corrosive vapours

Options

Viewing port (glazed or unglazed)
Gas inlet with flowmeter
Digital communications
Overtemperature protection
Sample thermocouple port
Calibartion certificates