In a ceramics plant, the kiln is where the energy goes — and most of it goes nowhere useful. In the roller kilns that fire most tile, more than half the energy input escapes straight up the flue and cooling-gas stacks, and by some accounts only 5 to 20% of the energy actually fires the product. The rest leaves through the walls, through cracks, and with the hot tiles exiting the kiln. With firing running at 800 to 1800°C around the clock and thermal energy the single biggest cost in the plant, that loss is enormous and largely invisible without measurement. iFactory's process energy analytics monitors firing kilns, dryers, and forming energy so the thermal waste hiding in the stacks becomes a number you can act on.
iFactory Process Energy Analytics
Cut Thermal Waste in Ceramics Firing
Monitor firing kilns, dryers and forming energy in tile, brick and ceramics plants — surfacing the stack and wall losses that quietly drive up fuel cost and emissions.
50%+
energy lost up the stacks
5-20%
actually fires the product
800-1800°C
firing temperatures
23-25%
cost cut from fuel reduction
Where the Kiln's Energy Actually Goes
A firing kiln's energy balance is sobering once it is drawn out. Only a fraction of the fuel does the work of firing the ceramic; the majority leaves as heat through four main pathways. Naming where it goes is the first step to recovering it.
Flue gas
Up the stack
Hot combustion exhaust carries a large share of the energy straight out of the firing zone and into the atmosphere.
Cooling gas
Exhaust stack
Air used to cool fired product leaves hot through its own stack — a major stream, and prime for heat recovery.
Walls
& cracks
Heat conducts through kiln walls and escapes through cracks and gaps, a steady loss that worsens as refractory ages.
Hot product
Leaving the kiln
The fired tiles themselves carry away thermal energy as they exit, heat that careful cooling design can reclaim.
Three Stages, One Thermal Bill
Ceramics energy is not just the kiln — it is forming, drying, and firing in sequence, each with its own thermal demand. iFactory meters all three so the plant-wide picture is complete and the biggest opportunity is obvious.
Forming
Pressing, extrusion, and shaping energy tracked as the entry point of the process, before any heat is applied.
Drying
Dryers and spray dryers running at 60 to 200°C to expel water — a significant thermal load and a heat-recovery target.
Firing
The kiln at 800 to 1800°C, the dominant energy consumer and where the largest savings almost always hide.
By Kiln & Line
Consumption attributed per kiln, dryer, and line, so cost and efficiency are visible where decisions are made.
Want your firing, drying, and forming energy broken out by line? Book a demo and we'll map your thermal bill.
Specific Energy Consumption, Per Unit Fired
Total fuel use tells you little; energy per unit of fired product tells you everything. iFactory normalizes consumption into specific energy consumption — kWh or kJ per kilogram or square meter fired — so efficiency is measured against output and drift shows up immediately, kiln by kiln.
Energy per Unit Fired
Consumption normalized to kg or square meter of product, the true efficiency metric rather than a raw fuel total.
Firing vs Total Split
See how much of the bill is firing versus drying and forming, so improvement effort targets the heaviest stage.
Kiln-by-Kiln Benchmark
Compare specific consumption across kilns and shifts, surfacing the underperformer hiding in a plant-wide average.
Drift Detection
A rising SEC trend flags creeping inefficiency — aging refractory, combustion drift — before it inflates the annual bill.
Find the Savings the Stacks Are Hiding
Once consumption is trended against output, the levers that recover energy become visible and prioritizable. These are the proven routes to cutting a ceramics plant's thermal bill — and monitoring is what tells you which one pays off first.
Combustion & Excess Air
Excess-air variation in burners signals incomplete combustion control; tightening it cuts fuel without changing the firing curve.
Heat Recovery
Cooling-zone and stack heat can be captured to pre-warm combustion air or feed the dryer, reclaiming a large stream.
Firing Curve & Overshoot
Trending temperature against schedule exposes overshoots and overlong cycles that smart control can trim by double digits.
Refractory & Insulation
Rising wall losses signal degrading insulation, turning a vague suspicion into a justified maintenance decision.
Curious which lever would pay back fastest in your plant? Talk to our energy team and we'll benchmark your kilns.
From Thermocouple to Energy Insight
Turning kiln heat into a managed number is a sequence: capture the thermal and fuel data, normalize it to production, trend it for drift, and surface the recovery opportunity. Each step is what turns a temperature reading into a savings decision.
1
Capture Thermal & Fuel
Zone temperatures, fuel gas flow, and stack conditions stream in, the data a true kiln energy balance requires.
2
Normalize to Output
Energy is tied to product fired to produce specific energy consumption, the metric that exposes real efficiency.
3
Trend & Compare
Live SEC is compared across kilns and against baseline, surfacing the drift and the underperformers continuously.
4
Surface the Recovery
Loss pathways and heat-recovery potential are quantified, turning stack waste into a prioritized savings list.
One Platform, Plant-Wide Visibility
Energy analytics is strongest joined to the rest of the operation. Because the same platform carries asset health and maintenance, rising wall losses or combustion drift can raise a work order — turning a slow efficiency leak into planned refractory or burner service. And because firing energy is largely emissions, the same data supports your sustainability reporting.
Links to Maintenance
A drift in wall loss or combustion can raise a work order, turning a degrading kiln into planned service before fuel cost climbs.
Supports Emissions Reporting
Firing energy is largely CO2, so the same consumption data feeds sustainability and emissions-intensity reporting.
Plant-Wide View
Kilns, dryers, and forming on one screen, so the whole plant's thermal story sits in a single place.
Runs On-Prem
The platform runs on a pre-configured edge server inside your firewall, with read-only links and no external egress.
What Kiln Energy Monitoring Delivers
Making thermal waste visible converts directly into lower fuel cost, steadier firing, and recovered heat. These reflect outcomes ceramics manufacturers pursue when they bring energy monitoring to kilns, dryers, and forming.
Lower
Fuel cost
stack and combustion losses surfaced on the kilns that burn most
Per-unit
SEC visibility
energy measured against product fired, kiln by kiln
Recovered
Waste heat
cooling and stack heat quantified for reuse in drying
Lower
CO2 intensity
less fuel burned means less emitted, on the same data
Curious how much thermal waste your kilns are hiding? Talk to our energy team and benchmark it against process energy analytics.
Frequently Asked Questions
Why is so much kiln energy wasted?
Because firing is inherently heat-intensive and most of that heat leaves before it does useful work. In the roller kilns that fire most tile, more than 50% of the energy input escapes through the flue and cooling-gas stacks, and only roughly 5 to 20% actually fires the product — the rest goes through walls and cracks and out with the hot tiles. The losses are large but largely invisible without measuring the kiln's energy balance.
What is specific energy consumption and why does it matter?
Specific energy consumption is energy per unit of product fired — kWh or kJ per kilogram or square meter — rather than a raw fuel total. It matters because it measures efficiency against output, so a kiln drawing more fuel because it is producing more looks different from one drawing more because it is degrading. iFactory normalizes consumption into SEC and benchmarks it kiln by kiln, so creeping inefficiency shows up immediately.
Where do the savings actually come from?
Several proven levers, prioritized by what monitoring reveals: tightening combustion and excess air, recovering cooling-zone and stack heat to pre-warm combustion air or feed the dryer, trimming firing-curve overshoots and overlong cycles, and addressing degrading refractory and insulation. One energy-efficient kiln study cut brick production cost 23 to 25% through fuel-gas reduction alone — and monitoring is what tells you which lever pays back first.
Does it cover drying and forming too, or just the kiln?
All three. Forming, drying, and firing each carry a thermal demand, and the platform meters all of them — pressing and extrusion energy, dryers and spray dryers running at 60 to 200°C, and the kiln at 800 to 1800°C. The firing stage is the dominant consumer and usually the biggest opportunity, but seeing the full sequence is what lets you find heat-recovery links, such as feeding kiln waste heat into the dryer.
Does our data leave the plant?
No. The platform runs on a pre-configured edge server on-premise, inside your firewall, with read-only links to your kiln controls and meters and no external egress required to operate. Your process and energy data stay local. The fastest way to see fit is a demo on your own kilns; book a slot and bring your kiln and dryer list and a recent fuel bill.
Stop Firing Money Up the Stack.
See Your Kilns' Hidden Thermal Waste
Bring your kiln and dryer list and a recent fuel bill. We'll map firing, drying, and forming energy, show specific energy consumption benchmarked kiln by kiln, and quantify the stack and cooling-gas heat you could recover — all on an on-prem server inside your firewall.
On-prem
inside your firewall
