A device for preparing nano-zinc oxide by non-equilibrium oxidation of metal zinc

A nano-zinc oxide and metal zinc technology, applied in the direction of carbon monoxide, zinc oxide/zinc hydroxide, nanotechnology, etc., can solve the problems of increasing the production cost of indirect zinc oxide, difficulty in meeting nano-level requirements, and coarse particle size of zinc oxide , to achieve high energy utilization efficiency, excellent performance, and small product particle size

Active Publication Date: 2019-05-31
钢研晟华科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The raw material used by the indirect method of zinc oxide is metal zinc ingot or zinc slag, and the purity of the prepared zinc oxide can reach 99.7%. It is mainly used in rubber, electromagnetic and other industries, but the fuel used by the traditional indirect method of zinc oxide production enterprises is natural gas, 1 Natural gas consumption per ton of zinc oxide product is about 100m 3 , which not only increases the production cost of indirect zinc oxide, but also cannot produce this product in areas without natural gas
The oxidizing gas used in the traditional indirect zinc oxide production is air, since air is a diatomic gas, and a ZnO molecule needs an O atom, so an O 2 Molecules can generate two ZnO molecules, so the particle size of the obtained zinc oxide product is relatively thick, belonging to the millimeter level, which is difficult to meet the needs of the nanometer level

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  • A device for preparing nano-zinc oxide by non-equilibrium oxidation of metal zinc
  • A device for preparing nano-zinc oxide by non-equilibrium oxidation of metal zinc

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Experimental program
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Embodiment 1

[0042] The process steps are as follows: put 100kg of zinc ingot into the first graphite crucible for external heating and melting; the melted metal zinc liquid flows into the second graphite crucible for external heating and evaporation, and the evaporated zinc vapor enters the oxidation chamber for oxidation, oxidation The gas is CO produced by external heating 2 Smoke, the volume of smoke is 100m 3 , the oxidation temperature is around 1300°C. The zinc oxide dust obtained by oxidation passes through the gravity settling chamber, the cooling pipe, and then through the bag dust collection to obtain the zinc oxide product with the gas. The particle size of the zinc oxide product is 100-800nm, and the gas after the bag dust collection is returned to be used for external heating and melting of metal zinc And the evaporation process, the combustion air used is oxygen with an oxygen content of 90%.

Embodiment 2

[0044] The process steps are as follows: put 100kg of zinc slag into the first silicon carbide crucible for external heating and melting; the melted metal zinc liquid flows into the second silicon carbide crucible for external heating and evaporation, and the evaporated zinc vapor enters the oxidation chamber for oxidation , the oxidizing gas is CO produced by external heating 2 Smoke, the volume of smoke is 150m 3 , the oxidation temperature is around 1150°C. The zinc oxide dust obtained by oxidation passes through the gravity settling chamber, the cooling pipe, and then through the bag dust collection to obtain the zinc oxide product with the gas. The particle size of the zinc oxide product is 50-500nm. The gas after the bag dust collection is returned to be used for external heating and melting of metal zinc And evaporation process, the used combustion air is oxygen with an oxygen content of 95%.

Embodiment 3

[0046] The process steps are as follows: put 100kg of zinc slag into the first graphite crucible for external heating and melting; the melted metal zinc liquid flows into the second graphite crucible for external heating and evaporation, and the evaporated zinc vapor enters the oxidation chamber for oxidation, oxidation The gas is CO produced by external heating 2 Smoke, the volume of smoke is 200m 3 , the oxidation temperature is around 950°C. The zinc oxide dust obtained by oxidation passes through the gravity settling chamber, the cooling pipe, and then through the bag dust collection to obtain the zinc oxide product with the gas. The particle size of the zinc oxide product is 50-500nm. The gas after the bag dust collection is returned to be used for external heating and melting of metal zinc And the evaporation process, the combustion air used is oxygen with an oxygen content of 100%.

[0047] The present invention also provides a kind of device that is used for preparin...

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Abstract

The invention discloses a method for preparing nano-zinc oxide by a metal zinc non-equlibrium oxidation method. The method comprises the following steps: using carbon dioxide as an oxidizing agent foroxidizing metal zinc vapor, and synthesizing the zinc oxide, wherein while the metal zinc is fused and evaporated, the carbon dioxide is provided by smoke generated by burning a fuel; and providing the fuel for the fusion and the evaporation of the metal zinc by a coal gas generated in the oxidation process. In the reaction process of the method, other energy sources are not consumed. The methodhas the characteristics of high energy utilization efficiency, good product quality and low production cost. In the production process, an external heat source does not need to be consumed, so the economic benefit is better. A zinc oxide product obtained by the CO2 zinc oxide vapor has the characteristics of small particle size, good property and extensive use.

Description

technical field [0001] The invention relates to the field of zinc oxide preparation by an indirect method, in particular to a device for preparing nanometer zinc oxide by a metal zinc non-equilibrium oxidation method. Background technique [0002] Zinc oxide is an important basic chemical raw material, which is widely used in the manufacturing industries of rubber, paint, ceramics and other chemical products. Zinc oxide has a wide range of uses and a large consumption. The amount of zinc used to produce zinc oxide each year accounts for about 5% to 10% of the total amount of zinc. According to the different production methods of zinc oxide, zinc oxide can be divided into three types: indirect method zinc oxide, direct method zinc oxide and active zinc oxide. The indirect method of zinc oxide uses metal zinc ingots or zinc slag as raw materials. It is evaporated into zinc vapor at high temperature in the crucible, then blown into air for oxidation, and the zinc oxide particl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/03C01B32/40B82Y30/00
CPCB82Y30/00C01G9/03C01P2004/64
Inventor 高建军王锋王海风齐渊洪林万舟严定鎏周和敏许海川
Owner 钢研晟华科技股份有限公司
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