What Is a Muffle Furnace?

Muffle furnace, Muffle means package, furnace means furnace, furnace. Muff furnaces are commonly called in China as follows: electric furnaces, resistance furnaces, Maofu furnaces, and muffle furnaces. Muffle furnace is a universal heating equipment, which can be divided into box furnace, tube furnace, and crucible furnace according to its appearance.

Muffle furnace

Muffle furnace, Muffle means package, furnace means furnace, furnace. The common names of muffle furnaces in China are as follows:

(1) Thermal processing, industrial workpiece processing, cement, building materials industry, hot processing or processing of small workpieces.

(2) Pharmaceutical industry: used for inspection of medicines and pretreatment of medical samples.

(3) Analytical chemical industry: As a sample treatment in water quality analysis, environmental analysis and other fields. It can also be used for petroleum and its analysis.

(4) Coal quality analysis: used to determine moisture, ash, volatiles, ash melting point analysis, ash component analysis, element analysis. Can also be used as a general ashing furnace.

The classification of the muffle furnace can be classified according to the different heating elements, rated temperatures, and controllers, as shown below:

1) According to heating elements: electric furnace wire muffle furnace, silicon carbon rod muffle furnace, silicon molybdenum rod muffle furnace;

2) According to the rated temperature, they are generally divided into: muffle furnaces below 1000 ° C, muffle furnaces at 1000 ° C and 1200 ° C, muffle furnaces at 1300 ° C and 1400 ° C, and muffle furnaces at 1600 ° C and 1700 ° C. 1800 muffle furnace.

3) According to the controller, there are the following types: pointer table, ordinary digital display table,

1. After opening the package, check whether the muffle furnace is intact and the accessories are complete. The ordinary muffle furnace does not need special installation, just lay it flat on the flat floor or shelf in the room. The controller should avoid vibration.

1. When the muffle furnace is used for the first time or re-used after being suspended for a long time, it must be baked. The oven time should be four hours at room temperature to 200 ° C and four hours at 200 ° C to 600 ° C. When in use, the maximum furnace temperature must not exceed the rated temperature, so as not to burn the heating elements. It is forbidden to inject various liquids and easily soluble metals into the furnace. It is best to work in a muffle furnace below 50 ° C below the maximum temperature. At this time, the furnace wire has a longer life.

2. The muffle furnace and controller must work in a place where the relative humidity does not exceed 85%, and there is no conductive dust, explosive gas or corrosive gas. When metal materials such as grease need to be heated, a large amount of volatile gas will affect and corrode the surface of the electric heating element, destroy it and shorten the life. Therefore, when heating, it should be prevented and sealed in time or properly opened to eliminate it.

3. The muffle furnace controller should be limited to use in the range of ambient temperature 0-40 .

4. According to the technical requirements, regularly check the connection of the electric furnace and the controller for good connections, and check whether the pointer is stuck and stuck when the pointer moves, and use a potentiometer to check the meter for magnetic steel, demagnetization, wire, and shrapnel Increased errors caused by fatigue, balance failure, etc.

5. Do not pull out the thermocouple suddenly at high temperature to prevent the jacket from bursting.

6, often keep the furnace clean, timely remove oxides and other things in the furnace.