Fiber Lined Front Loading Kilns


Product Overview

These kilns are made to order and have many variables that affect the cost. Please contact us for pricing and availability of this item.

Fiber Lined Front Loading Kilns

GEIL Forced Draft Kilns

Forced Draft models are the same superior construction technique as that of the Natural Draft models, with the exception of the burner system. A standard Forced Draft system incorporates the use of an electric blower to force air through the burners to insure complete combustion. Call for Specifications and Pricing.

GEIL Natural Draft Kilns
The frame construction of all GEIL Fiber Lined Natural Draft Kilns consists of heavy gauge structural strength steel. All frames are welded at each joint, providing maximum strength and durability. The exterior consists of a dual-wall type construction using 9 gauge expanded metal with galvanized sheet metal. An air gap is provided between the two, producing a cooler exterior temperature. 
Each model has full width, front loading doors and has been specifically designed to minimize the area between the door opening and the setting space, alleviating strenuous loading and unloading.
The ceramic fiber interior lining consists of a two-stage component system featuring a high density, 12 lb. Monolithic Block and a high density, 12 lb. Edge Grain Veneer Facing. Each Monolithic Block is attached to the shell with a stainless steel attachment clip and sealed with a high temperature sealant. The 12 lb. Edge Grain Veneer is attached to form the Hot Face capable of temperatures to 2500° F (cone 14). 
All ceramic fiber materials used in the construction of GEIL Kilns have been specifically designed and manufactured to GEIL specifications for high fire applications. Each kiln comes equipped with natural draft, high velocity, ceramic venturi burners specifically designed and developed by GEIL Kilns to produce excellent fuel-air mixture without the need of electric blowers. These burners provide for simple and trouble-free firing.
Standard Equipment
  • Electronic flame safety, 100% Shut Off
  • Push button automatic spark ignition
  • Manual control valve
  • 0-15" water column pressure gauge
  • DD-1 digital, solid state, electronic controller which functions as a high-limit, on/off soaking controller
Optional Equipment

The use of ceramic fiber as a kiln insulator offers the kiln user several important advantages over kilns constructed with a conventional refractory insulation.

Lightweight: Ceramic fiber linings are 75% lighter than insulating fire brick linings and 90-95% lighter than dense refractory linings. 

Low Heat Storage: Low heat storage is the most important advantage of a ceramic fiber lining. Heat storage is directly proportionate to the weight of the material used in the kiln lining. The lighter the lining, the fewer BTUs needed to bring the kiln up to temperature. The BTUs required to fire is directly related to energy consumed. Thus, the fewer the BTUs consumed, the more energy conserved. 
Moreover, the kiln can achieve its maximum temperature more quickly and can cool down faster over kilns constructed with insulating fire brick. Shorter operating cycles increase productivity and save wear and tear on the kiln. 

Thermal Shock Resistance: Fiber linings are completely immune to damage from thermal shock. Therefore, predetermined heat up/ cool down cycles dictated by the kiln's lining are eliminated. Once the firing cycle is completed, access to the kiln can be immediate without fear of damaging the lining.

Thermal Efficiency: Fiber linings are thermally more efficient then conventional refractory linings. The low thermal conductivity of fiber means the lining thickness can be reduced, thereby decreasing outside dimensions. Additionally, fiber heats at a more uniform rate, allowing for a more uniform temperature distribution within the kiln chamber.
Resiliency: In that fiber is extremely resilient and withstands movement well, kilns are transported easily without fear of damage. Kilns are test fired in our factory prior to shipping which eliminates any possible problems before they start.
Ease of Repair: Should physical damage to the lining occur, the damaged section is simply cut out with a knife and new material inserted. Repairs are made quickly with a minimal amount of expense and downtime.
Energy Savings: Research has shown that ceramic fiber kilns conserve as much as 30-40% in energy over comparably sized insulating fire brick kilns. Such tremendous savings means much faster payback periods.
Cool Down: All GEIL fiber kilns have been designed and engineered to insure a cool down rate equal to that of similar sized brick kilns. Cool down can be easily controlled by damper adjustments. A normal cool down requires the damper to remain closed. This may be hastened by opening the damper slightly.
Specifications - Fiber Lined Front Loading Natural Draft Kilns
DL-8F DL-12F DL-16F DL-18F DL-20F DL-24F
DL-28F DL-30F DL-36F DL-40F DL-50F DL-60F
Geil's Innovative Downdraft Firing System
The original GEIL Downdraft Design was created in 1971 by owner, Paul H. Geil, and has since been refined and improved upon without alteration to the basic design.
The basic design features:
  • Elimination of all deflection devices characteristic of other kiln designs
  • Multi-directional downdraft circulation
  • High velocity, natural draft, Venturi burners
  • Precise atmosphere control
  • Even temperature distribution throughout the kiln chamber
The GEIL Downdraft Patented Design differentiates itself from other kiln designs with its unique placement of the burners in relation to the draft.
Standard Downdraft Kilns Standard Updraft Kilns 
The standard relation of the burners to a downdraft-type system utilizes a horizontal placement of the burners, thereby necessitating the use of deflection devices, such as bagwalls, to deflect the heat flow upward. This deflection drastically reduces the velocity at which the heat enters the chamber, therefore a high flue is necessary in order to pull the atmosphere through the kiln. (figure 1) The vertical placement of the burners commonly found in updraft design requires the deflection of heat energy outward and upward through the use of hearth slabs. 
The updraft kiln has the flue opening at the top of the kiln and does not pull the atmosphere down through the center. The heat travels in only one direction-up and out the flue. This produces very little circulation and wastes valuable heat energy. (figure 2)
Figure 1: Front view cutaway Figure 2: Front view cutaway
The Geil Downdraft design
The GEIL Downdraft System utilizes heat energy to its fullest potential through recirculation. This, of course, means energy savings and consistently superior results in firing. In contrast to other kiln designs the GEIL Design ingeniously allows for the elimination of all such deflection devices through the vertical positioning of the burners within the framework of a downdraft design. (figure 3) 
Deflection devices simply absorb valuable heat energy and obstruct the direct transfer of heat to the setting. The elimination of deflection devices produces an unobstructed, multi-directional heat flow or circulation within the kiln chamber which conserves fuel, produces excellent firing results and offers more available combustion area.
Combustion areas running the entire length of the side walls insure a proper oxygen to gas ratio, necessary for complete combustion to occur. The occurrence of combustion heats the kiln's atmosphere. The kiln's heated atmosphere rises and is drawn downward by the action of the flue. The flue opening is centered in the rear wall directly over the kiln floor and serves to create the necessary vacuum to pull the atmosphere downward through the setting. Precise atmosphere distributions are easily achieved through the adjustment of the damper and the main gas valve controlling the burners.
Figure 3: Front view cutaway