Lith Corporation, founded in 1998 by a group of material science doctor from Tsinghua University, has now become the leading manufacturer of battery lab&production equipment. Lith Corporation have production factories in shenzhen and xiamen of China.This allows for the possibility of providing high quality and low-cost precision machines for lab&production equipment,including: roller press, film coater,mixer, high-temperature furnace, glove box,and complete set of equipment for research of rechargeable battery materials. Simple to operate, low cost and commitment to our customers is our priority.
Microwave Ashing Furnace – Professional Mechanical Equipment Introduction
A Microwave Ashing Furnace is a highefficiency thermalanalysis and materialprocessing device designed specifically for rapid ashing, oxidation, combustion, and decomposition of organic substances using microwave heating technology. By combining controlled microwave energy with hightemperature oxidation conditions, the microwave ashing furnace provides a clean, fast, and precise method for determining ash content in food, biomass, plastics, pharmaceuticals, coal, petroleum products, and various chemical materials. Compared with conventional muffle furnaces, this system significantly improves processing speed, temperature uniformity, and analytical accuracy, making it an essential tool in modern laboratories and industrial qualitycontrol environments.
1. Concept of the Microwave Ashing Furnace
A microwave ashing furnace applies microwaveinduced volumetric heating to accelerate the combustion of organic components within a sample. Microwaves penetrate the sample and directly interact with polar molecules, generating internal heat while simultaneously supplying oxygen or airflow to support complete oxidation. Because heating occurs throughout the sample volume instead of merely on its surface, ashing efficiency is enhanced and processing times are reduced by up to 70–90% compared with conventional methods.
This furnace is designed for analytical procedures requiring precise control of sample ashing temperatures typically between 100°C and 1000°C, depending on material characteristics and regulatory standards.
2. Structural Design
A microwave ashing furnace consists of the following key structural components:
• Microwave Generator System
Powered by magnetron or solidstate microwave sources, delivering stable microwave energy at 2.45 GHz. Power can be continuously adjusted to match sample requirements.
• HighTemperature Ashing Chamber
The internal chamber is constructed from microwavetransparent refractory materials such as quartz, alumina, or mullite. These materials withstand high temperatures without absorbing microwaves, allowing microwaves to reach the sample directly.
• Thermal Insulation Layer
Multiple layers of hightemperature ceramic fiber insulation prevent heat loss and maintain stable temperature conditions inside the furnace.
• Airflow or Oxygen Supply System
Programmable airflow channels, exhaust systems, or forcedventilation modules ensure adequate oxygen for complete combustion and effective removal of fumes generated during ashing.
• TemperatureControl and Monitoring System
Thermocouples, infrared sensors, or optical pyrometers provide realtime temperature readings. A PLC or microprocessorbased controller regulates heating ramps, dwell times, and microwave power levels.
• Safety Interlocks
Microwave shielding, leakage detection, door interlocks, overtemperature protection, and fume ventilation systems ensure reliable and safe operation.
3. Key Characteristics
• Volumetric Microwave Heating
Microwaves heat the entire sample simultaneously, drastically reducing the ashing time.
• High Temperature Precision
Advanced controllers maintain temperature accuracy within ±1–2°C, ensuring repeatability of analytical results.
• Clean and Controlled Atmosphere
Airflow or oxygen supply ensures complete oxidation without contamination.
• Rapid Thermal Response
Heating rates are significantly faster than conventional muffle furnaces.
• Automated Process Control
Programmable recipes allow multistep ashing procedures, ensuring standardized and repeatable analysis.
Microwave Muffle Furnace
4. Process Technology
The microwave ashing furnace supports a variety of analytical and thermal decomposition processes:
• Rapid Ashing
Used to determine ash content in food, biomass, plastic resins, rubber, pharmaceutical powders, and petrochemical samples. Microwave heating accelerates oxidation and ensures complete ashing.
• PreAshing
For materials sensitive to sudden high temperatures, the furnace can gently heat samples in the initial stage before moving to hightemperature oxidation.
• Combustion and Oxidative Decomposition
Suitable for analyzing organicinorganic compounds and determining residue composition.
• HighTemperature Treatment
Some models support hightemperature sintering or calcination of inorganic residues after ashing.
All processes can be performed under controlled temperature and airflow conditions, guaranteeing reliable analytical outcomes.
5. Applications
Microwave ashing furnaces are widely used in:
• Food and Agricultural Analysis
Determining ash content in food nutrients, grains, meat, dairy products, and feedstock.
• Environmental and Biomass Research
Ashing of sewage sludge, biomass fuels, hazardous waste, and soil samples.
• Polymer and Plastic Industry
Testing ash residues, additives, fillers, and reinforcing fibers.
• Pharmaceutical and Chemical Industries
Quality control of active ingredients, excipients, and chemical compounds.
• Energy and Petroleum Sectors
Ashing coal, coke, petroleumbased products, and catalysts.
• Research and Academic Laboratories
Supporting routine sample preparation, material characterization, and analytical studies.
6. Advantages
• Extremely Fast Processing
Ashing cycles that traditionally require several hours can be completed within 10–30 minutes.
• Improved Analytical Accuracy
Uniform internal heating prevents incomplete combustion and ensures consistent results.
• Lower Energy Consumption
Microwave heating is more efficient, reducing operational costs and thermal loss.
• High Environmental Safety
Closedcavity design, ventilation systems, and reduced fumes improve laboratory safety.
• Reduced Sample Loss
Controlled heating prevents sample splattering or accidental volatilization of inorganic content.
• Enhanced Automation
Predefined ashing programs reduce human error and simplify operation for users of all skill levels.
Conclusion
The Microwave Ashing Furnace is a technologically advanced, highspeed, and reliable analytical instrument designed for rapid and precise determination of ash content in a wide range of materials. Its innovative volumetric heating mechanism, precise temperature control, and efficient oxygen supply system provide superior performance compared with traditional muffle furnaces. With significant advantages in speed, accuracy, energy efficiency, and safety, the microwave ashing furnace has become an indispensable tool in laboratories, research institutions, and industrial qualitycontrol systems worldwide.
If you need versions for microwave muffle furnace, microwave sintering furnace, or industrial microwave ashing system, I can create them as well.
+86 13174506016
Louis@lithmachine.com
+86 18559646958
18659217588
