Custom Tunnel Kilns at a Small Scale

Gas-fired furnaces can produce remarkably different products compared to electric-fired furnaces. An excellent option to scale up while replicating the conditions present in resistance-heated batch furnaces is to use a bespoke Deltech tunnel kiln.

Depending on the user'sprocess parameters, a tunnel kiln might be preferable to a production size “top hat”, bottom loader, or front load furnace, while still maintaining the rapid heating and cooling and exceptional temperature uniformity characteristic of Deltech non-continuous furnaces.

The list of many additional features that can be added to the user’s custom-designed and build tunnel kiln is shown below.

Tunnel Kilns. Image Credit: Deltech, Inc

Features

Gas analysis and sampling in preheat and exit zones

Single or multizone including preheat and cool down sections

Integrated scales for measurement and data logging of material weight changes

Sustained operating temperatures up to 1800 °C

Control systems are certified by Intertek UL508A compliant

Feeding options include screw conveyors, gravity feeds, and volumetric loading

Control systems made to order, just like your new kiln. PLC/HMIs for speed control, weight data, control trends, and temperature data are examples of features. The user’s desired brand of temperature controller can be supplied and integrated

Fiberboard or ceramic lined

The ability to add additional length as product demand grows

Gas curtains to protect the environment from materials outgassing

All systems are built to comply with UL508A, CSA 22.2, and NFPA 86 standards

Controlled atmosphere capability including gas mixing and delivery systems

Information Needed to Start the Design Process:

Number of zones

Product characteristics

Any required controlled atmosphere capability

Desired operating temperatures

Product dwell time at the desired temperatures

Workspace size

Temperature requirements of individual zones