Hello everyone, today I will answer some questions about zinc, including what zinc is. Many people still don’t know, so I will analyze it for you today. Analysis, let’s take a look now! If your problem is solved, I hope you will pay attention to this site, thank you~
Table of contents of this article
1. Combustion value of zinc
Zinc is difficult to burn in air and emits strong white light in oxygen. Melting point: 419.53℃.
Zinc is a chemical element, its chemical symbol is Zn, its atomic number is 30, and it is located in the 4th period and the 4th period of the periodic table of chemical elements. Family IIB. It is a light gray transition metal.
1. Store in a cool and dry place, away from fire and heat sources;
2. With Oxidants, amines, sulfur, phosphorus, acids and alkalis are stored separately;
3. Fire extinguishing: dry powder, dry sand. Water and foam are prohibited.
1. Calculate iron sphalerite or sphalerite into zinc oxide in the air, and then reduce it with carbon (lower purity);
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2. Or mix zinc oxide and coke and heat it in a blast furnace to 1373K~1573K to distill the zinc out (purity is about 98%);
3. Or after leaching with sulfuric acid to form zinc sulfate, by controlling the pH, the zinc is dissolved into zinc sulfate and impurities such as iron, arsenic and antimony are hydrolyzed and converted into precipitates into the leaching residue, and zinc is added Powder is used to remove impurities such as copper and cadmium in the filtrate, and then electrolysis is used to precipitate zinc. The zinc produced by the latter has higher purity (about 99.99%).
2. The scientific name of zinc
Group number: IIB Electronic configuration outside the nucleus: 2-8-18-2 crystal
Structure: The unit cell is a hexagonal unit cell .Color and state: bluish light gray
Atomic radius (calculated value): 135(142)pm Pure zinc is blue-white and shiny.
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Hardness 2.5 (Mohs hardness), density 7.14 g/cm3.
Melting point 419.58℃, boiling point 907℃.
3. What is zinc
Zinc is a chemical element, its chemical symbol is Zn, its atomic number is 30, and it is located in the 4th period and Group IIB of the periodic table of chemical elements. Zinc (Zinc) is a shallow The gray transition metal is also the fourth \”common\” metal. In modern industry, zinc is irreplaceable in battery manufacturing and is a very important metal. In addition, zinc is also one of the essential trace elements for the human body. Extremely important role
4. There are several types of zinc
So far, scientists have studied a variety of zinc, and zinc is divided into several categories due to different functions. The following is the classification of zinc:
(1) No. 4 zinc. ① Zinc content is not less than 99.5%; ② The main impurities are: lead, iron, cadmium, copper, arsenic, antimony, tin, aluminum; ③ Mainly used for making zinc plates, zinc powder, hot-dip galvanizing, and ordinary castings and zinc oxide.
(2) No. 3 zinc ①The zinc content is not less than 99.90%; ②The main impurities are: lead, cadmium, copper, iron, and tin. ; ③ Mainly used for zinc plates, hot-dip galvanizing and copper alloys
(3) No. 2 zinc ①Zinc content is not less than 99.95%; ②Main impurities. It is: lead, cadmium, copper, iron, tin; ③ Mainly used to make zinc alloys, battery zinc sheets and die-cast parts
(4) No. 1 zinc. . ①The zinc content is not less than 99.99%; ②The main impurities are: lead, cadmium, copper, iron, and tin; ③Mainly used for high-grade zinc oxide, pharmaceutical and chemical reagents, electroplated zinc, and die-cast parts.
(5) No. 0 zinc. ① The zinc content is not less than 99.995%; ② The main impurities are: lead, cadmium, copper, iron, tin; ③ Used for manufacturing advanced alloys and special purposes.
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