How to import zinc oxide mixture, does steel mill chimney ash belong to zinc oxide mixture

Because such zinc-containing raw materials often contain lead, cadmium, indium and other substances, they are classified as hazardous wastes and are not allowed to be imported in China. Some businesses illegally enter the country according to other substances, which is another matter, once they are discovered, they go inside the wall.

Customs Chemicals, Dangerous Goods, Chemicals, Customs Clearance Information, Customs Declaration, Inter-sea Shipping, Air Transportation, Railway Transportation, Chemical Standards.

1. The operation process of chemical import (PS: the process of many chemical goods is similar).

1. Determine the product. The information that customers need to prepare before inquiry: product name, MSDS, product packaging, weight, Chinese composition description.

2. Confirm whether it is a chemical product. If it is a chemical product, a Chinese label needs to be affixed before shipping abroad;

3. Import record testing. Chemicals that need to be filed for testing need to be sampled in advance and do a good job of filing.

4. Import inspection.

5. Import declaration.

6. Customs inspection. If it is a chemical product, it will be inspected in the chemical warehouse;

Second, the chemical customs declaration filing information:

1) When applying for the filing of imported chemicals, the applicant for the record shall fill in the Application Form for the Filing of Imported Chemicals

2) A copy of the "Business License of Enterprise Legal Person" of the applicant for the record (with a seal), and a copy of the "Business License of an Enterprise Legal Person" (with a seal) of the sub-packaging manufacturer of the chemicals to be sub-packaged. A statement by the manufacturer of imported chemicals that the content of hazardous substances in its products complies with relevant Chinese laws and regulations.

3) About the basic composition, brand, model, origin, appearance, label and marking of the sub-packaging manufacturer and location, sub-packaging product label and other relevant materials (subject to the Chinese version) of imported chemical products

4) Ask for additional materials.

Second, the time required for the import declaration of chemical products and the inspection process.

1. After receiving the filing application, the Inspection and Suggestion Bureau shall review the qualifications of the filing applicant, the filing application form and the information provided within 5 working days, and issue the "Notice of Acceptance of the Filing Application for Imported Chemicals". If the requirements are met, please accept the filing because it does not meet the requirements? If required, the application can be re-submitted after supplementing the relevant information required by the "Notice of Acceptance of Application for the Filing of Imported Chemicals".

2. After the applicant accepts the application for filing with the Inspection and Quarantine Bureau, the representative samples that are consistent with the content of the application shall be entrusted to the Chemical and Mineral Laboratory of the Industrial Products Testing Technology Center of the Inspection and Quarantine Bureau for special testing, and the number of samples shall meet the requirements of the laboratory for special testing and sample retention, and the sample volume of special testing of chemicals: 2 copies each? 1 liter.

3. Special testing: about 15 working days.

4. Registration: 3 working days? The "Record of Imported Chemicals" shall take effect from the date of hydrogen issuance and shall be valid for one year. During the validity period, when there is a major event that may affect the performance of the chemicals, the imported chemicals should be re-filed for the record.

You are the importer, and for the customs, he has the right to hold you legally responsible.

The other party, depending on the contract product, is different from the manufacturer.

I feel like it should look at the taste of zinc oxide mixtures, a lot of which are smelter dust removal ash.

Iron is iron, zinc is zinc, and there is no zinc oxide in steel mills.

Adding an appropriate amount of dilute hydrochloric acid to the mixture of copper oxide and zinc oxide will cause two reactions of Cuo + 2HCl = CuCl2 + H2O and Zno + 2HCl = ZnCl2 + H2O, and because the activity of iron is stronger than copper and weaker than zinc, the reaction of Fe + CuCl2 = FeCl2 + Cu will occur when adding excess iron powder to it, so the obtained filter residue is Fe, Cu, and the solute is FeCl2 and ZnCl2

Therefore, the answer is: fe, cu; fecl2、zncl2；cuo+2HCl=CuCl2+H2O or Zno+2HCL=zNCL2+H2O or FE+CUCl2=FeCl2+CU (write one).

The answer is: d, znco3

Solution: Write the chemical equation and you can see the mass ratio of reactants to sulfuric acid.

a、zn～65：98

b、zno～81：98

c、zn（oh）2～99：98

d、znco3～125：98

Mass ratio of mixture to sulfuric acid.

Depending on the nature of the mixture, the components must have components greater than 100:98 and less than 100:98; Or equal to.

a, b, and c are all less than 100:98, and only d is greater than 100:98.

So there must be a d.

After sufficient reaction, the concentration of Zn2+ in the resulting solution is that there is a surplus of hydrochloric acid due to the conservation of charge

1) Let the quantities of Zno and Zn be x mol and y mol respectively, then:

x+y＝81x+65y＝

x= y=

Therefore the number of electrons transferred is, so the answer is:

2) According to the conservation of electron transfer, the amount of matter that produces hydrogen is 2=, and the volume of hydrogen is, so the answer is:;

3) The mass of zno is, so the answer is:

Zinc sulfate, ferrous sulfate.

Because in the end, there is a surplus of iron. Therefore, the filter residue must contain iron, and the metal activity is that zinc is greater than iron and greater than copper, so all copper exists in the filter residue in the form of elemental substances, and zinc is in the filtrate.

Zinc sulfuric acid, ferrous sulfate.

After full reaction, zinc sulfate, copper sulfate, and ferrous sulfate are generated.

And "adding dilute sulfuric acid to the filter residue produces flammable gas", so it should be an excess of iron, but iron cannot replace the zinc in zinc sulfuric acid, and copper does not react with dilute sulfuric acid, so there is zinc sulfuric acid and ferrous sulfate in the filtrate.

Zinc, zinc oxide, zinc hydroxide and zinc carbonate can react with dilute hydrochloric acid to form zinc chloride, the quality of chlorine before and after the reaction remains unchanged, the quality of dilute hydrochloric acid is: 200g, the quality of chlorine element is:

Let the mass of zinc chloride be x, then there is:

x×65+100%= x=

Then the mass fraction of the solute in the resulting solution is.

So choose A

Since hydrochloric acid is a solution and is in sufficient contact with the substance, it is a simultaneous reaction.

1. If you contact at the same time, you will react at the same time.

2. Zinc oxide reacts quickly.