Ashing furnaces - for controlled ashing processes

Where are ashing processes needed?

An high temperature ashing furnace for laboratories can be used in various areas. One of the most important applications of laboratory furnaces is the heating of substances or samples and the subsequent analysis of the ashed combustion residue. Thus, ashing furnaces are indispensable in more and more industries. Especially in the following sectors, laboratories, institutes and companies cannot do without a high-performance laboratory furnace:

Research

In the most diverse fields of science and research, products or samples as well as tissue structures or cells have to be tested. In order to generate profound findings, the materials or their residues are dried and then incinerated in an incineration furnace. Given its composition, the ash provides further insights into specific properties that are relevant for further investigations.

Dental laboratory

To gain insights into historical or forensic factors, dental and trace element analyses are often indispensable. Mobile ashing furnaces are used in the dental laboratory to examine tooth structures by ashing. This is done with the intention of gaining further insights and being able to draw conclusions about certain events or occurrences.

Recycling

Recycling plays an increasingly important role today. Both in the environmental sector and in a wide variety of production areas, ashing processes are used in order to conserve resources and save costs. Metals, plastics and many other materials are often recycled in ashing furnaces in the manufacturing plants in order to make them available for new production steps.

Food industry

The ashing of foodstuffs for subsequent substance analysis is an essential element with regard to the development of innovative products, also in the field of new genetic engineering developments. In addition, this technology is used to learn more about the composition and value of specific foods. 

An ashing furnace is also used for laboratories in this sector to determine grain ash . This also applies to all common milled grain products. Here the focus is on the mineral content, among other things, which remains as an incombustible residue.

Ashing furnace in the laboratory: construction

A classic incinerator for laboratories can reach temperatures of 300 to 1,500 degrees Celsius, depending on the model. The procedure for incinerating the product is simple: the sample, usually uncrushed, is weighed into the incineration tray. This is located in the centre of the oven. The product-specific temperature can be preset with the help of the mostly digital temperature control. 

Even small quantities provide meaningful results: The inner chamber of the oven is sealed tightly, then the outer segment must be compressed. The ashing process can then be initiated. The process is completed when the glue residue has taken on a soft, dry consistency. 

Then it has cooled down. It is also important to determine the moisture content of the pulp in a separate procedure. This is because the amount of ash must be put in relation to the dry substance .

Types and equipment of ashing furnaces

In the MedSolut range we offer our quality-conscious customers different types of ashing furnaces with numerous equipment variants. Please contact us. We will be happy to help you choose the right product for your laboratory, institute or company.

Standard ashing furnaces

Discover the proven standard ashing furnaces for classic applications for sample analysis in the laboratory in our online catalogue. The various functions and additional elements, such as rolling lids, lifting or hinged doors , offer you additional convenience in the daily laboratory routine when carrying out your work projects.

Ashing furnace with scales

It is advantageous to use an incineration furnace with an included scale for your laboratory, both for incinerating the smallest quantities and for larger material volumes. In this way, the preliminary tests can be carried out directly and then compared with the incineration results. Ashing furnaces in this product category improve efficiency and help to save a lot of time.

Precision ashing furnace

In dental laboratories, but also in research and science, the highest precision is required when it comes to gaining new knowledge or carrying out investigations. Therefore, the precision ashing furnaces are equipped with numerous additional elements. Also in order to comply with specific standards and legal requirements. The ISO and ASTM standards , among others, are relevant here.

Ashing furnace with afterburning

When it comes to ashing larger sample quantities, ashing furnaces with post-combustion are a good choice. They are ideal for biomass samples that emit larger amounts of flue gases during the ashing process. 

Ashing furnaces with post-combustion consist of several chambers, including a post-combustion chamber. There, the coarse particles contained in the flue gas are selected. They are then burnt by blowing in hot air.

Safety regulations and standards for the use of an incinerator in the laboratory

Several factors must be taken into account when purchasing and using laboratory ashing furnaces. Specific standards and safety regulations must also be observed. We will be happy to provide you with detailed and individual advice in this regard:

DIN 38409-1

The DIN 38409-1 standard describes the German standard procedure for water, wastewater and sludge analysis. In addition, it refers to summary effect and substance characteristics, the determination of the total dry residues, the filtrate dry residues as well as the glowing residues which arise during ashing.

DIN 38409-2

In addition to DIN 38409-1, DIN 38409-2 determines the filterable substances and the quality of the glowing residues after ashing.

DIN EN 1879

DIN EN 1879 applies to the use of permanent fires. Stoves for solid fuels and logs must comply with this standard and also with EN 13240.

DIN EN ISO 1172

DIN EN ISO 1172 describes the design of glass-textile reinforced plastics as well as the properties of glowing surfaces in incineration and muffle stoves.

DIN 19684-3

Within the framework of chemical laboratory tests and soil analysis procedures, DIN standard 19684-3

DIN EN 12879

DIN EN 12879 describes the characterisation of sludges and is of central importance with regard to the determination of the Glhverlust of the dry mass after an incineration or burning process.

DIN 18128

DIN 18128 defines the loss of dry matter after ashing of the respective samples for tests or examinations of building ground as well as for the taking of soil samples.

DIN EN ISO 3451-1

DIN EN ISO 3451-1 defines precise parameters with regard to the ashing of plastics. The standard DIN EN 1172 also plays a role in determining the ash after the ashing of plastics.

Other relevant standards for the ashing furnace laboratory

EN 60519-2 generally defines the safety requirements in electric heating plants. BS 1016 Part 4 specifies the methods for analysing coal and coke after ashing, while ASTM D2361 defines the residues and waste gases produced during the ashing of coke and coal. DIN ISO 344 and 1171 define the requirements for safety, protective and occupational footwear for work on ashing furnaces. 

In addition, there are the standards D2795 and D31784, which clearly describe the quality requirements of ceramic plates as an internal segment in ashing furnaces.

Choosing the right ashing furnace for your laboratory

With MedSolut's friendly team of experts, you can easily find the perfect ashing furnace for your laboratory. We provide professional assistance in selecting the ideal furnace, as there are several relevant factors to consider.

Generation of dangerous gases

To prevent possible contamination by dust or the formation of toxic gases, the ashing furnace in laboratories in many industries should be equipped with a separate, specially coated ceramic furnace chamber . This reduces the formation of aggressive hydrochloric acid, nitric or sulphur gases and also limits the escape of any splash gases.

Air exchange

Choose an incineration furnace for the laboratory with particularly powerful heating elements, which are provided with a graduated coil. This will prevent possible heat loss due to high air changes.

Sample quantities/filling volume

Depending on how many samples are to be treated in the ashing furnace and how much filling volume is required in each case, you will need a larger or smaller ashing furnace. Please contact us. We will be happy to advise you.

Expected workload for the furnace

The workload in laboratory areas is lower than in industrial areas, for example. We will be happy to take the time to find the right ashing furnace for the laboratory based on the workload on site.

Find the optimal ashing furnace for your laboratory at MedSolut.

Contact our team of experts today to find the ideal ashing furnace for your laboratory. Benefit from our individual professional advice and secure the excellent service MedSolut offers you. We look forward to your call on +49 30 209 657 900 or your e-mail to info@medsolut.com. What can we do for you?