What Is A Retort Furnace

And the term retort comes from the chemical industry.

What is a retort furnace.

The airtight vessel where the material is processed is the retort. Exhaust gases are burned in an exhaust torch. The defining characteristic of a muffle furnace is that it separates the object to be heated from all by products of combustion from the heat source. A muffle furnace or muffle oven sometimes retort furnace in historical usage is a furnace in which the subject material is isolated from the fuel and all of the products of combustion including gases and flying ash.

A muffle furnace refers to the insulation and separation of the heating elements from the contents of the retort. Difference between retort and muffle furnaces. Retort furnaces have a sealed vessel that is placed over or around the product and separates the product and process space from the system insulation and heat source. This action of tumbling provides uniform heating and process gas distribution for very small and densely packed workloads.

An early method for producing phosphorus starts by roasting bones and uses clay retorts encased in a very hot brick furnace to. With modern electrical furnaces this means heat is applied to a chamber through induction or convection by a high temperature heating coil inside an insulated material. After the development of high temperature heating elements and widespread electrification in developed countries new muffle furnaces quickly moved to electric designs. The idb version of the retort furnaces implements a safety concept by controlled purging the furnace chamber with a protective gas.

While the term muffle furnace or retort furnace is still in use today it doesn t really mean the same thing as it did in the early 20 th century when wood and coal were the primary ways to heat a furnace. The retort is a gas sealed chamber that the material to be heated is. Before the advent of modern condensers retorts were used by many prominent chemists such as antoine lavoisier and jöns berzelius. A muffle furnace s primary attribute is that it has separate combustion and heating chambers.

A pump evacuates the retort and the process runs either under vacuum or at a specific negative or positive pressure once the initial vacuum level is reached. Retorts were widely used by alchemists and images of retorts appear in many drawings and sketches of their laboratories. The advantages of using a retort include the fact that the furnace surrounding the retort can be gas fired or electrically heated and that the retort can be rapidly pumped down. High temperature muffle retort furnaces.

Muffle furnace is a term made by the furnace manufacturers. The furnace style is a revolving retort which is a horizontally oriented drum with internal flights that while rotating it tumbles and conveys the load from one end to the other. Retort furnaces allow accurate and efficient control of the work space argon or hydrogen atmosphere and provide low atmosphere usage due to the closed nature of the system. Exhaust gases are burned in an exhaust torch.