The lead (Pb) in the lead ore is a high-density, soft blue-gray metal, with a melting point of 327 and a boiling point of 1740, and a large amount of lead vapor escapes when the temperature exceeds 400, which is rapidly oxidized into lead oxide smoke in the air. Common lead-containing substances include Tantra (PBO), Huangdan (PB2O3), Pb3O4, Pb(OH)2ยท2PBCo3), lead sulfate (PBSO4), etc. In nature, it mainly exists in the form of galena (PBS) and white lead ore (PBCo3), but also in lead alum (PBSO4), and occasionally natural lead. Lead ore is often mixed with elements such as zinc, silver, and copper. Lead and its compounds are widely used, metallurgy, batteries, printing, pigments, paints, glazes, solder and other operations can be exposed to lead and its compounds.
The crystal structure of lead is a cubic lattice. Lead has high density, low hardness, low melting point, high boiling point, poor conductivity to electricity and heat, and can absorb radiation, so it is used to make containers for radioactive substances and used as protective materials.
The following is the text of an article about the information and process required for import customs clearance of lead ore and the precautions:
1. Information required for import customs clearance of lead ore.
1.Contracts, invoices, packing lists, bills of lading and other basic documents;
2.Quality certificate, certificate of origin and other supporting documents for lead ore;
3.Test report of the composition content and harmful substance content of lead ore;
4.Import licenses, regulatory certificates and other relevant documents;
5.Other documents required by Customs.
Second, the lead ore import customs clearance process.
1.The applicant submits relevant information to the customs and makes a declaration;
2.The Customs shall review the declared materials, including document review and physical inspection;
3.After the examination is passed, the customs will issue the import license and notify the applicant;
4.The applicant shall submit relevant materials to the customs and pay the corresponding taxes and fees in accordance with the requirements of the license
5.The Customs will review the materials submitted by the applicant and go through the release procedures.
3. Precautions for import customs clearance of lead ore.
1.Applicants need to ensure that the information provided is true and valid, otherwise they will face legal liability;
2.When declaring, it is necessary to fill in clearly and completely in accordance with the requirements of the customs to avoid omission, misdeclaration and other situations
3.During the inspection, it is necessary to cooperate with the work of the customs to avoid unnecessary delays;
4.When paying taxes and fees, it is necessary to pay the corresponding taxes and fees in accordance with the requirements of the customs to avoid omission and wrong payment
5.After release, follow-up supervision is required in accordance with the requirements of the customs to ensure that the imported lead ore meets the relevant regulations and standards.