The silicon powder is used as a raw material, and the desired shape is first formed by a usual molding method, and preliminary nitriding is performed in a nitrogen gas at a high temperature of 1200 ° C, and a part of the silicon powder is reacted with nitrogen to form silicon nitride, and the entire billet is then formed. The body already has a certain strength. Then, a second nitriding is carried out in a high temperature furnace at 1350 ° C to 1450 ° C to form a silicon nitride. A silicon nitride having a theoretical density of 99% can be obtained by a hot press sintering method. Silicon Nitride Ceramic Rod,Silicon Nitride Ceramic Threads,Silicon Nitride Ceramic Shaft Rod,Industrial Silicon Nitride Ceramic Rod Dongguan Haikun New Material Co., Ltd. , https://www.hkceram.com
It is understood that ceramics production and refractory manufacturing enterprises have serious dust hazards, and even some cases of group pneumoconiosis have occurred in some areas. In 2015, the State Administration of Work Safety organized investigations and tests on 27 ceramic manufacturing enterprises and 23 refractory manufacturing enterprises in some regions. From the test results, most workplace dust is a serious dust, and the concentration exceeds the national standard limit, the highest exceeds 140 times, which poses serious harm to the occupational health of workers.
In this regard, the State Administration of Work Safety will carry out special treatment on dust hazards in ceramic production and refractory manufacturing enterprises. The scope of governance includes various ceramic and ceramic raw material production enterprises such as construction and sanitation, refractory materials manufacturing and refractory raw material production enterprises.
The plan is clear, it is necessary to focus on the main task of “pot dust concentration control complianceâ€, to supervise law enforcement and typical demonstration as a starting point, to promote enterprises to improve production processes, improve dust-proof facilities and strengthen occupational health management, effectively curb the occurrence of pneumoconiosis . On the basis of full implementation of engineering governance, the “four 100%†requirements are met, that is, the personal protective equipment allocation rate of laborers with key dust hazards is 100%; the training rate of corporate leaders, occupational health management personnel, and dust workers is 100. %; the periodic detection rate of dust hazard is 100%; the occupational health check rate of workers exposed to dust is 100%.
The program requires that all levels of safety supervision departments should take care of all aspects, combine governance work with infrastructure construction and supervision and law enforcement work, and conduct supervision and inspection of each enterprise governance during the special governance period. The special governance work should focus on key positions, strengthen key aspects such as dust prevention facilities, inspection and monitoring, personal protection, and health monitoring, and urge enterprises to implement governance measures to improve the working environment and working conditions. The higher-level safety supervision department shall strengthen the supervision and spot check on the special-level governance work of the lower-level safety supervision departments, and notify the criticism of the areas where the governance work is weak, and publicly expose the enterprises that have gone through the governance work. (Legal Evening News)
The State Administration of Work Safety will carry out special treatment on dust hazards for ceramic refractory enterprises
In order to control, reduce and eliminate the dust hazards of ceramics production and refractory manufacturing enterprises, and effectively protect the occupational health rights of workers, the State Administration of Safety Supervision has recently formulated a plan and decided to organize ceramic production and fire resistance from March 2016 to the end of 2017. material...
In order to control, reduce and eliminate the dust hazards of ceramics production and refractory manufacturing enterprises, and effectively protect the occupational health rights of workers, the State Administration of Safety Supervision has recently formulated a plan and decided to organize ceramic production and refractory materials from March 2016 to the end of 2017. The special management of dust hazards in manufacturing enterprises is exposed to illegal enterprises that refuse to be governed or not properly managed.