Utilization of zinc-containing flue dust for resource recovery! In the steel and metallurgy industries, the accumulation of zinc-containing flue dust not only occupies space but also poses a threat to the ecological environment due to heavy metal pollution. How can such "industrial waste" be transformed into high-value secondary zinc oxide? 

ZK leveraging its rotary kiln technology and full-process service capabilities, has provided an effective and environmentally friendly solution for the industry, helping enterprises achieve resource recycling and a win-win situation of economic benefits! 

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1.Core technology: Rotary kiln process, effectively extracting secondary zinc oxide ZK adopts a mature rotary kiln pyrolysis extraction process. Through the following key steps, the effective recovery of secondary zinc oxide in the flue dust is achieved:

 (1) Scientific ingredients and pre-treatment Mix the zinc-containing flue dust with anthracite/coke powder in a certain proportion. 

(2) High-temperature reduction and oxidation The mixture is subjected to high-temperature calcination in the rotary kiln's high-temperature zone (approximately 900°C). The zinc element is reduced to vapor, which then combines with oxygen to form zinc oxide dust. The kiln body is designed with an inclined structure, allowing the materials to be pushed layer by layer. This results in high thermal efficiency and a low amount of agglomeration. 

(3) Intelligent collection and environmentally friendly processing The zinc oxide dust is effectively collected through the cooling system and bag filter, with a purity of over 75%. The exhaust gas is treated by the dust collector and desulfurization tower and then discharged in compliance with standards. The cooling water is recycled to achieve zero pollution. 

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2. Process advantages: Low cost, high return, environmentally friendly 

(1) The raw materials have strong adaptability. It can handle low-grade waste materials such as zinc-containing fly ash and gas sludge with zinc content ranging from 15% to 25%. These materials have a wide range of sources and can be transformed from waste into valuable resources. 

(2) Energy-saving and effective The equipment's heat consumption has been reduced by 15%, the zinc recovery rate is over 85%, and the annual output of primary zinc oxide can reach 7,000 tons, significantly increasing the enterprise's profits.

(3) Environmental compliance The entire process is equipped with dust removal and desulfurization systems, and the exhaust gas emissions comply with national standards, helping enterprises achieve green production. 

(4) High degree of automation By adopting an intelligent control system, the temperature inside the kiln and the material conditions can be monitored in real time. This reduces the need for manual intervention and ensures the stability of production.

Walk hand in hand, create the future together

Resources are limited, but the cycle is endless. Henan Zhengzhou Mining Machinery Co., Ltd. uses innovative technologies and considerate services to help enterprises unlock the "zinc" opportunity in flue gas ash, achieving a dual improvement in environmental protection and economic benefits.