The solid waste generated in the production process of powder coating belongs to China's banned import of solid waste. Whether the imported powder coating material belongs to solid waste can not be determined by the common sense and visual observation of port supervisors. It needs to be identified through special solid waste identification, but so far. There are no solid waste identification criteria, specifications or methods for powder coating materials. Therefore, it is very necessary to establish a solid waste identification method for imported powder coating materials. Based on the summary of several examples of solid waste identification of imported powder coating materials, the solid waste identification method was established: 1 Determine the natural properties of the materials, including analysis of the main components by Fourier transform infrared spectroscopy (FTIR): using low temperature The electric furnace and the muffle furnace obtained approximate mass fractions of organic matter and inorganic matter; X-ray fluorescence spectroscopy (XRF) was used to analyze the main components of the burning residue and their mass fractions. 2 Determine the source of the material, determine whether the material belongs to the powder coating product, specifically refers to the physical form and impurities observed by the naked eye; measure the particle size distribution of the powder part; analyze the state of the powder part of the container, particle size distribution, coating appearance and resistance Impact and other indicators required in HGT2006-2006 "Thermosetting Powder Coatings". 3 Determine the solid waste property of the material, that is, according to the relevant provisions of GB34330-2017 "General Rules for the Identification of Solid Wastes", the conclusion of the solid waste identification of the materials is obtained. This method was used to identify solid wastes from two materials that were suspected to be solid waste in the name of powder coating products. The identification results showed that both materials were produced in the production process of powder coating products, which were unqualified powder or expired. Both powder and ultrafine powder belong to China's banned import of solid waste. It shows that the established solid waste identification method is feasible and can provide reference for the identification and supervision of solid waste in the production of imported powder coatings.

 

The Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Solid Waste defines solid waste as “a solid, semi-solid and agglomerated product that has lost its original use value in production, life and other activities or has not been abandoned or abandoned. The gaseous articles and substances in the containers and the articles and substances that are included in the management of solid wastes as stipulated by laws and administrative regulations also stipulates that “the prevention and control of pollution of liquid wastes shall be applied to this Law; however, the prevention and control of pollution of wastewater discharged into water bodies shall be relevant. This law does not apply to the law." It can be seen that “solid waste” is a legal term because the form of solid waste is not only solid, that is, solid waste is not “solid waste”. The so-called solid waste actually includes solid waste, semi-solid waste, and discharged into water. Liquid waste other than waste water and gaseous waste placed in the container. The identification of solid waste is a prerequisite for the identification of hazardous waste. Before the identification of hazardous waste, the identification of solid waste must first be carried out. If a substance is not a solid waste, it is not classified as hazardous waste. The identification of solid waste is the basic needs and technical basis of solid waste management. The identification of solid waste can confirm the object of solid waste management, which can effectively prevent the illegal import and utilization of solid waste, especially hazardous waste.

 

China's management policy for restricting imports of solid waste, prohibiting the import of the Catalogue of Imported Solid Wastes (No. 80, 2014) Solid waste, driven by economic interests, some unscrupulous traders often declare imports or smuggle solid waste in the Prohibited Catalogue in the name of products. In the port solid waste import management, it is impossible to determine whether the imported materials belong to the solid waste in the Prohibited Catalogue only by the common sense and visual observation of the port supervisors, and special solid waste identification is required. The identification of solid waste as an important means to control the entry of solid waste into the country under the Prohibited Catalogue is important for curbing the illegal import of solid waste in the Prohibited Catalogue, strengthening the management of imported solid waste, and establishing and maintaining the normal trade order for the import of solid waste. effect. The existing solid waste identification basis is GB34330-2017 "General Principles for the Identification of Solid Wastes" issued by the Ministry of Environmental Protection in 2017. However, this standard only lists in detail the principle clauses of the substances from which the source is derived, such as solid waste. Relevant content of solid waste identification methods. China has not yet promulgated specifications, standards, technical guidelines, etc. for the identification of solid waste materials. Frequently, different appraisers have different identification conclusions for the same identification materials.