Ditmer Trading & Consulting BV
Enameling furnaces are required for curing vitreous/porcelain enamel coatings.
Firing is perhaps the most important process step at vitreous / porcelain enameling operations.
Please find below all posts related to industrial enameling furnaces and firing :
The performance of industrial enameling furnaces may gradually decline over time.
This may result in higher energy consumption (read increased enameling cost) and reduced quality of the coated surface.
In extreme cases the enameling furnace may even unexpectedly break down, because insulation has been damaged and/or worn out.
Therefore we suggest regular inspections & thermal imaging to identify major heat bridges and other spots with possible insulation issues.
One of our relations has a low thermal mass continuous enameling furnace for sale.
The main characteristics of this furnace are as follows :
– original manufacturer New Furnace
– double hooked U-type
– hotzone length 5 meters
– effective product sizes 1250 mm height and 550 mm width
– gas fired with 4 radiant tubes & metal flue
– capacity circa 2500 kg gr/h
Please contact us, if you are potentially interested in this second-hand enameling furnace.
One of our relations has a low thermal mass continuous enameling furnace for sale.
The main characteristics of this furnace are as follows :
– original manufacturer Ferro (Holland) BV
– double hooked U-type
– hotzone length 5.3 meters
– effective product sizes 900 mm height and 600 mm wide
– gas fired with 5 radiant tubes & metal flue
– capacity circa 900 kg gr/h
Please contact us, if you are potentially interested in this second-hand enameling furnace.
Firing is a critical process step at every enameling shop, because it determines the esthetical and functional properties of the fused enamel coating.
In order to continuously achieve good enameling results, it is important to maintain the actual firing conditions at the enameling furnace within strict tolerances.
Regular verification of the actual temperature profile measured on the enamelled object is therefore a common procedure at industrial enameling plants with ISO 9000 quality assurance systems.
Companies with only one enameling furnace and a verification frequency of once per year, will typically outsource these temperature surveys to a specialized company.
Ditmer Trading & Consulting BV has the necessary equipment to measure temperature profile(s) at your enameling plant.
Companies with multiple furnaces and/or a high verification frequency, may consider to perform this test inhouse and purchase a state-of-the-art furnace tracker via our webshop.
Beneath a typical example of a temperature profile at a double hooked U-type continuous enameling furnace for cooker components.
Important aspects of firing curves are :
Traditionally temperature measurement within continuous enameling furnaces was done with a so-called Bozsin box.
These large & heavy insulated boxes contained a full-size working temperature recorder with paper printer, which was connected via one or multiple thermocouples to an object while both being suspended at the furnace conveyor and passing thru the enameling furnace.
Over time electronics became smaller & smarter and nowadays furnace temperatures profiles are recorded by means of a data logger which is placed in a much smaller thermal barrier. (see picture above)
Upon completion of the test run this data logger is connected with a laptop or PC and the collected data may be processed & analyzed with advanced software. See our webshop for more details.
Optionally it is even possible to have real time data transmitted from the furnace tracker.
As mentioned previously, DTC may perform furnace surveys and measure temperature profiles at your facilities.
Contact us for a cost estimation
Amortisation, operation & maintenance of capital equipment represent a significant cost factor at any finishing plant.
The Total Cost of Ownership may be reduced by selecting the appropriate equipment/technology, optimizing the equipment performance, minimizing corrective maintenance cost and/or avoiding sudden equipment breakdowns.
Continue reading “Asset management services”
A clean furnace atmosphere is important for obtaining good enameling results.
Elevated concentrations of CO2 and/or H2O may slow down the emission of gases from the metal substrate thru the enamel layer during the fusion stage and under certain unfavorable circumstances result in enameling defects such as pinholes & fish-scales.
CO2 & H2O may accumulate inside the furnace, if the combustion system is leaking and/or the forced abstraction of combustion gases is not sufficient.
Regular furnace inspections and maintenance are therefore strongly recommended. Continue reading “Enameling furnace atmosphere”