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Zinc dross regeneration process

A zinc dross and process technology, applied in the field of multi-purpose comprehensive utilization and regeneration of zinc dross, can solve the problems of inability to fully recover zinc dross, low recovery efficiency, waste of resources, etc.

Pending Publication Date: 2022-03-08
扬州新达再生资源科技有限公司
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Problems solved by technology

This method is inefficient in recycling, resulting in a great waste of resources
The journal "Nonferrous Metallurgy Energy Conservation" Issue 3, June 2021, "Improvement of Zinc Smelting and Casting Zinc Dross Treatment Process", discloses a process for multi-channel screening of zinc dross to improve the recovery of zinc-containing particles in dust process; this scheme can improve the utilization rate of zinc scum to a certain extent, but the subsequent products after roasting the undersize cannot be effectively utilized, and the full recovery of zinc scum still cannot be realized

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  • Zinc dross regeneration process

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Embodiment Construction

[0028] The following is attached figure 1 , to further illustrate the present invention.

[0029] A kind of zinc scum regeneration process of the present invention, take the zinc scum formed by hot-dip galvanizing and / or electrolytic zinc process as raw material, process according to the following steps:

[0030] S1: Grind and sieve the zinc scum to separate it into zinc particles and zinc ash; the mesh size of the sieve is more than 80 mesh, the sieved zinc particles account for about 35%, and the zinc ash accounts for about 65%;

[0031] S2: Send the zinc particles into the furnace for smelting, feed in natural gas as fuel, and the smelting temperature is 400-500°C;

[0032] S3: Put the zinc ash into the converter for roasting to remove chlorine, feed in natural gas as fuel, and roast at a temperature of 700-800°C to obtain roasting furnace slag and converter flue gas;

[0033] S31: crushing the roasting furnace slag to obtain zinc calcined sand;

[0034] S32: washing the...

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Abstract

The invention relates to a zinc dross regeneration process. Relates to the technical field of resource regeneration, in particular to a multipurpose comprehensive utilization and regeneration method for zinc dross. Zinc dross formed by a hot galvanizing and / or electrolytic zinc process is used as a raw material, and the zinc dross is processed according to the following steps: S1, grinding and screening the zinc dross to separate the zinc dross into zinc particles and zinc ash; s2, the zinc particles are fed into a smelting furnace to be smelted; s3, the zinc ash is fed into a converter to be roasted, and roasted slag and converter flue gas are obtained; s31, the roasting furnace slag is smashed, and zinc calcine is prepared; and S32, the converter flue gas is subjected to water vapor washing, mother liquor is obtained, the mother liquor is filtered, and crude zinc oxide is prepared. According to the invention, the roasting product is fully recycled.

Description

technical field [0001] The invention relates to the technical field of resource regeneration, in particular to a multi-purpose comprehensive utilization regeneration method of zinc scum. Background technique [0002] Zinc dross is solid industrial waste formed in the production process of hot-dip galvanizing and electrolytic zinc, and ammonium chloride and zinc chloride are usually used as plating fluxes. Therefore, the main components of zinc scum are elemental zinc, zinc oxide and zinc chloride, and the main impurities are iron, with a chlorine content of about 5%. Zinc dross is an industrial waste with high utilization value. How to fully recycle it is the key to realize the value of zinc dross. [0003] In the traditional process, the recovery of zinc dross usually adopts the direct melting zinc smelting method, that is, the zinc dross is melted, the zinc liquid is separated and cast into zinc blocks, and the rest is discarded. The recycling efficiency of this method i...

Claims

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Application Information

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IPC IPC(8): C22B19/30C22B7/04C22B1/02C22B19/34C09K3/18
CPCC22B19/30C22B7/04C22B1/02C22B19/34C22B7/001C09K3/185
Inventor 鞠其彪
Owner 扬州新达再生资源科技有限公司
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