There is a light yellow substance on the inner wall of the reduction furnace

It is a mixture of several substances, and its main components cannot be determined with certainty; it is flammable and explosive. The temperature in different parts of the reduction furnace varies, which leads to different reactions occurring. It should be cleaned with pure water and then dried. There are some discussions on this topic available at http://bbs.hcbbs.com/thread-395192-1-1.html

It’s not clear exactly what it is, but it’s probably a mixture of various substances, and it’s flammable :)

Silicon halide compounds are flammable and explosive; they should not be struck, and it is best to clean them with a 30% alkaline solution

When in small quantities, no cleaning is required; it can prevent impurities from the bell jar from spreading into the furnace, thereby improving the quality of the silicon rods； Cleaning is only necessary when there is a large amount present

If a yellow substance is produced, it is necessary to check whether there are any leaks in the reduction furnace, or to analyze the yellow substance to determine what it is

Beijing Degaojie Cleaning Equipment Co., Ltd. produces polycrystalline silicon reduction furnace bodies and bell-jar dry cleaning systems designed for the silane-based polycrystalline silicon production process; these systems are used for clean, pollution-free dry cleaning in situations where the adhesion of silicon contaminants in the reactors of the reduction workshop is not strong. During cleaning, an up-and-down moving and rotating mechanism is used to drive high-pressure gas spraying, while a special rotating brush assembly is employed to spray and clean the surface of the reactor up close, thereby achieving cleaning purposes. The requirements of various operating conditions can be met by cleaning the rotary speed control mechanism. While cleaning, a special dust removal and purification device is used to remove dust and purify the air in one go. II. System Features 1. The device features a mobile unit structure ； 2. The purified air can achieve a cleanliness level of 100,000, and can be released entirely indoors ； 3. A fully enclosed, dry cleaning method is used to ensure no secondary pollution to the environment ； 4. The electrical design complies with all the requirements regarding explosion protection, and the equipment is equipped with static electricity discharge devices ； 5. The control mode can be fully automatic or manual ； 6. Low overall operating power and low noise level. Schematic diagram of the cleaning device for the base of the polysilicon reduction furnace. III. Cleaning process: The reaction vessel is lifted onto the cleaning platform → positioned → connected → the purifier is started → rotation is initiated → the up-and-down moving mechanism is activated → high-pressure gas is blown along the walls → a rotating brush moves upward and downward to clean the surface → the area is purged with clean gas → the reaction vessel is lifted again → inspection is performed. IV. Equipment Composition It mainly consists of a cleaning platform, gas injection devices, dust collection and delivery pipelines, control valves, power mechanisms, cleaning mechanisms, quick connectors for various pipelines, dust removal and purification units, and an electrical control system. The main components are made of imported parts, ensuring reliable and stable operation as well as a long service life. Operation and maintenance are simple. One of the earliest companies in China to engage in the research, development, and production of equipment for cleaning reduction furnaces, with numerous successful projects to its credit. Contact number: 13292616306