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Laboratory Muffle Furnaces: When are they used?

Muffle furnaces are used as a laboratory instrument to dry and sterilize glass and metal containers from high temperatures for various purposes, such as heat treatment, calcination tests, incineration of organic and inorganic samples and cooking of ceramic materials, among others. It is a very versatile and useful equipment in the industry. This furnace, are used when it is required to reach temperatures higher than 200 °C, in which inside the muffle furnace, only refractory laboratory materials can be used.

In addition, these muffle furnaces are used in various applications, such as in the metallurgy sector, drying and calcining of precipitates, high temperature flammability tests, metal alloys, tempering, casting tests and others that need heat treatment.

Applications and Uses of Muffle Furnaces

Muffle furnaces, comply with the realization of thermal processes, to improve the properties of hardness, stamping, resistance to shock attraction, wear, etc.

In this sense, muffle furnaces are designed to meet a wide variety of applications in different areas such as:

  • Laboratory work
  • Control Processes
  • Heat treatments
  • Precipitate drying
  • Precipitate calcination
  • Casting tests

Working Principle of Muffle Furnaces

These thermal power equipment, located on the sides and back of the furnace, are made of alloy resistant wire and ready to work for a long time. The resistors, transmit with great efficiency the heat to the bodies going from the body of higher temperature, to the body of lower temperature.

Inside the muffle’s internal chamber are:

  • Heating Elements: These are responsible for supplying the heat source inside the muffle.
  • Thermocouple: O sensor, which sends an electrical signal to the control to tell the control what temperature the muffle’s internal chamber is.

Control Panel

Timer: It is used to set a mule working time. That is, your computer will be running for a scheduled amount of time.

Temperature Control: Allows you to manage and set the temperature at which the mule will work.

Safety switch: According to the manufacturer, laboratory mufflers can be provided with a safety switch at the door. The job of this switch is to cut the power supply. This is done to minimize exposure to high temperatures to the laboratory operator when handling the muffle. In addition, generate unnecessary consumption of electrical energy.

Types of Muffle Furnaces

Generally, there are two types of muffle furnaces, those which are fueled by fuel and electric muffles.

  • Fuel Muffle: This type of muffle is used in applications that require temperatures above 1200°C. Usually, its heat source is supplied by propane or natural gas. This heat source must be completely separated from the cooking chamber. In this way, the sample to be treated cannot be contaminated by the flue gases.
  • Electric Muffle: The electric muffle is used in processes that require a maximum of 1200°C. They are also the most commonly used in the laboratory. They are usually smaller in capacity and size. Both 110 VAC and 220 VAC can be fed.

Furnaces Mufla brand Kalstein

At Kalstein, we are able to meet the demands of our users in the selection of laboratory equipment. We offer you, The YR Series Muffle Furnaces, which has attractive features, such as: High purity fibrous alumina insulation for maximum energy saving; Double layer steel structure with air cooling fan to keep the outside of the furnace safe to touch; reaches temperatures of 1200°C, 1400°C, 1700°C maximum operating; power control with 30 programmable segments, LCD touch screen control to choose from. Program software to connect the computer to choose from. The content may be subject to modifications or corrections, among others.

To learn more about our products, visit HERE

At Kalstein, as manufacturers, we provide all the advice our customers need, so that their purchase is ideal, and at excellent prices. Come visit us HERE

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