Safety Guidelines for the Use of High-Temperature Box-Type Electric Furnaces in University Laboratories

1. Equipment Selection and Installation

Prior to the procurement of box-type electric furnaces and other heating equipment, the installation location must be clearly defined, and the laboratory’s electrical load must be thoroughly assessed; overloading the laboratory’s electrical system is strictly prohibited. For high-power heating equipment, procurement may proceed only after a safety review of electrical usage has been conducted by the Logistics Support Office. Dedicated outlets, switches, and fuses must be installed, and the use of power strips for power supply is strictly forbidden.

2. Equipment Operating Procedures

Laboratories equipped with high-temperature apparatus such as drying ovens, muffle furnaces, and tube furnaces shall establish corresponding operating procedures and post them in a conspicuous location. Before using any heating equipment, its condition must be inspected; only after confirming that the equipment is functioning properly may it be used, and it must be operated strictly in accordance with the established procedures, without exceeding the temperature limits specified in the instruction manual. Laboratories housing commonly used heating equipment shall maintain adequate ventilation, ensure that the equipment is properly grounded, and strictly prohibit the accumulation of clutter, flammable or explosive chemicals, gas cylinders, and other hazardous materials above or around such equipment.

3. Equipment Maintenance and Care

A maintenance and inspection regime shall be established for commonly used heating equipment, with timely scheduling of repairs and replacement of aged or damaged components and wiring to ensure proper operating condition; operation while faulty is strictly prohibited. Commonly used heating equipment that fails to meet safety requirements must be taken out of service or promptly scrapped. The use of open-type electric furnaces or any equipment that may produce open flames or incandescent surfaces is strictly prohibited in laboratories. 4。

4. Operator Training

The person responsible for laboratory safety is accountable for the safe operation of heating equipment within their jurisdiction and is tasked with providing training on standardized operating procedures to all personnel who enter the laboratory to use such equipment. Each school bears supervisory responsibility for the safe use of heating equipment in the laboratories under its purview.

5. Operating Precautions

During operation, it is essential to adhere to the operating procedures for high-temperature box-type laboratory furnaces. Installation and connection: Place the furnace on a stable surface and ensure adequate ventilation in the surrounding area. Connect the furnace to the power supply and verify that the supply voltage matches the furnace’s rated voltage. Cleaning and maintenance: Before use, thoroughly clean both the interior and exterior of the furnace to ensure no contaminants enter the chamber. Regular routine maintenance should be performed to keep the furnace functioning properly. Parameter settings: Adjust the furnace’s temperature, time, and other parameters according to the requirements of the experiment. Most furnaces are equipped with a temperature controller, allowing for precise temperature adjustment as needed. Heating and temperature rise: Place the material to be heated inside the furnace, close the door, and turn on the power. Use the control panel switches or buttons to activate the heating element and gradually increase the temperature. During the heating process, carefully control the rate of temperature rise to prevent rapid heating that could cause the material to crack or break. Experimental monitoring: Throughout the operation, continuously monitor the experimental conditions, particularly changes in temperature and the heating rate. Temperature variations can be tracked in real time via the display on the control panel or through a thermometer. Completion of the experiment and safe operation: After the experiment, turn off the furnace’s heating element and wait until the temperature has dropped to a safe level before opening the door. Exercise caution when opening the door to avoid burns from escaping heat. Cleaning and maintenance: Following the experiment, clean the furnace thoroughly, removing any contaminants from both the interior and exterior, and perform routine maintenance to ensure the equipment remains in good working order.

The foregoing guidelines are summarized from the relevant safety management regulations and operating procedures of laboratories at various universities, with the aim of ensuring the proper and safe use of heating equipment such as box-type electric furnaces in university laboratories.