Method for continuously producing nano tetrapod-like zinc oxide from secondary zinc slag

A four-needle zinc oxide and secondary zinc technology, which is applied in chemical instruments and methods, single crystal growth, crystal growth, etc., can solve the problem that the morphology of zinc oxide whiskers cannot be effectively controlled, which affects the efficient recycling of zinc resources, and nanoparticle Problems such as uneven composition, to achieve the effect of reducing equipment use and process flow, expanding raw material sources, and easy control

Inactive Publication Date: 2018-11-13
HANDAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The nanoparticle components obtained by the mechanical pulverization method are uneven and easy to agglomerate; the chemical reaction method is low in cost and simple in equipment due to the use of chemical reagents, but it cannot effectively control the morphology of zinc oxide whiskers and pollutes the environment; although the thermophysical method can obtain high Zinc oxide with high purity and high activity, but generally use vacuum conditions, which have high requirements for heating equipment, and the vacuum environment limits its industrial production; switching to inert gas protection can change the dependence on vacuum environment and equipment, but the inert gas introduced is also It will significantly increase the production cost, and, in the process of producing zinc oxide whiskers, the morphology of zinc oxide whiskers generally obtained is a mixture of different shapes, and it is difficu...

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  • Method for continuously producing nano tetrapod-like zinc oxide from secondary zinc slag
  • Method for continuously producing nano tetrapod-like zinc oxide from secondary zinc slag
  • Method for continuously producing nano tetrapod-like zinc oxide from secondary zinc slag

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Embodiment 1

[0038] Embodiment 1: utilize secondary zinc slag to continuously produce the method for nano-tetraacicular zinc oxide, concrete process steps are:

[0039] (1) Ingredients:

[0040] The mass percentage of the main chemical components in the secondary zinc slag is shown in Table 1. The secondary zinc slag is crushed, and then sieved into a diameter of less than or equal to 1cm through a sieve, and then weighed 100g;

[0041] Table 1 Main chemical composition of secondary zinc slag

[0042]

[0043] (2), melting and evaporative oxidation of raw materials:

[0044] Put 100g of raw materials into a quartz crucible and place it at the center of the bottom of a closed crucible furnace. When heated to 700°C, keep the temperature constant for 20 minutes. The secondary zinc slag is in a molten state, and the slag liquid is layered; then raise the temperature to 1050°C. When no zinc vapor overflows from the mouth of the crucible furnace, it proves that Zn in the raw material has ev...

Embodiment 2

[0050] Embodiment 2: utilize secondary zinc slag to continuously produce the method for nano-tetraacicular zinc oxide, concrete process steps are:

[0051] (1) Ingredients:

[0052] The mass percentage of the main chemical components in the secondary zinc slag is shown in Table 2. The secondary zinc slag is crushed, then sieved into a diameter of less than or equal to 2cm by a sieve, and then weighed 500g;

[0053] Table 2 Main chemical composition of secondary zinc slag

[0054]

[0055] (2), melting and evaporative oxidation of raw materials:

[0056] Put the weighed 500g raw material into the quartz crucible, and place it at the center of the bottom of the closed crucible furnace. When heated to 700°C, keep the temperature for 20 minutes. The secondary zinc slag is in a molten state, and the slag liquid is layered; then the temperature is raised to 1100°C Constant temperature for 20 minutes; when no zinc vapor overflows from the mouth of the crucible furnace, it proves...

Embodiment 3

[0062] Embodiment 3: utilize secondary zinc slag to continuously produce the method for nano-tetraacicular zinc oxide, concrete process steps are:

[0063] (1) Ingredients:

[0064] The mass percentage of the main chemical components in the secondary zinc slag is shown in Table 3. The secondary zinc slag is crushed, and then sieved into a diameter of less than or equal to 3cm through a sieve, and then weighed 500g;

[0065] Table 3 Main chemical composition of secondary zinc slag

[0066]

[0067] (2), melting and evaporative oxidation of raw materials:

[0068] Put the weighed 500g raw material into the quartz crucible, and place it at the center of the bottom of the closed crucible furnace. When heated to 700°C, keep the temperature for 10 minutes. The secondary zinc slag is in a molten state, and the slag liquid is layered; then raise the temperature to 1150°C Constant temperature for 10 minutes; when there is no zinc vapor overflowing from the mouth of the crucible fu...

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Abstract

The invention discloses a method for continuously producing nano tetrapod-like zinc oxide from secondary zinc slag. The method comprises a batching step: crushing and screening the secondary zinc slag, and weighing certain amount of secondary zinc slag as a raw material; a raw material melting, evaporating and oxidizing step: putting the weighed raw materials into a quartz crucible, putting the quartz crucible to the bottom of a crucible furnace, heating the crucible furnace until zinc in the raw materials is completely evaporated, stopping heat, leaving the residues at the bottom of the quartz crucible, controlling oxygen content in the crucible furnace, and enabling zinc to completely react with oxygen gas; a product collecting step: after the zinc completely reacts with the oxygen gas,taking out the quartz crucible, naturally cooling at the room temperature, scrapping the outer surface and the inner upper-layer surface of the quartz crucible to obtain white flocculent nano tetrapod-like zinc oxide crystal whisker. The method can utilize secondary zinc slag zinc-containing waste to produce the tetrapod-like zinc oxide crystal whisker which is stable in quality, is uniform in component, is single in shape and is fine in particle, so that the preparation cost of the nano tetrapod-like zinc oxide is reduced, and the secondary zinc slag is prevented from polluting the environment.

Description

technical field [0001] The invention relates to a production method of nano-tetraacicular zinc oxide, in particular to a method for continuously producing nano-tetraacicular zinc oxide by utilizing secondary zinc slag. Background technique [0002] In the prior art, the raw materials for producing nano-tetraacicular zinc oxide mainly include zinc powder, zinc ingot, zinc pellet, zinc sheet or high-purity zinc vapor; the preparation of zinc powder generally requires pre-oxidation of zinc powder to make the surface of zinc powder Form an oxide film with a certain thickness, the oxide film can inhibit the rapid evaporation of zinc during the heating process, and control the penetration of oxygen into the zinc powder to ensure the time required for the growth of four-needle zinc oxide whiskers; the pre-oxidation treatment of zinc powder directly The large-scale continuous production of nano-tetraacicular zinc oxide is limited; and high-purity raw materials such as zinc ingots, z...

Claims

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Application Information

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IPC IPC(8): C30B29/16C30B29/62C30B29/66C30B25/00
CPCC30B25/00C30B29/16C30B29/62C30B29/66
Inventor 许斌卜二军薛向欣杨合李玉银徐晓朱文玲王晓晖
Owner HANDAN IRON & STEEL GROUP
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