An important eco-modernization is underway at Zaporizhstal

Implementation of the project on modernization of aspiration units of tail parts of sintering machines at the Zaporizhstal plant began in the summer. Earlier, "Industrialka" wrote about the start of work.

The principle of operation of new gas cleaning units of sintering machines is based on two-stage gas purification. This solution is the most modern and effective. 95% of gas cleaning systems installed at metallurgical plants in China, the United States and Europe are equipped with such filters.

The specificity of the filters is that the drafting machines, which provide air absorption during sintering of the agglomerate, control its transportation to treatment plants. Therefore, stopping the filtering equipment without stopping production is impossible.
At present, the plant has already installed a filter, 1, supports for clean gas flues, horizontal sections for dirty gas flues. The installation of the filter № 2 and the prechamber is currently being completed.
- The bag filter is a device of fine purification of gases. There are large fractions of dust in the gas-air mixture which, getting into the bag filter, can injure the filter hoses or seal the valves when unloading dust from the hoppers. In order to prevent this from happening, we went to weed out this large fraction of dust and installed a prechamber, - says Serhiy Herasimenko, deputy head of the sinter shop for aspiration and purification of process gases at the Zaporizhstal plant. - We have, we can say, a kind of hybrid - a device that has in its composition, and a bag filter, and a pre-cleaning chamber of the shock-inertial type. Due to this, only fine dust gets on the bag filter itself and complete cleaning takes place. Prior to that, we did not use such devices at our plant.

According to the project manager from the contractor ALD Engineering and Construction Yevhen Opalatenko, about 180 employees are involved in the modernization works. The work is performed around the clock.
- The main large-scale installation on the ducts and the shelf is almost completed. It remains to assemble the roof on the shelf and sew everything with insulation. There are inserts in the sinks of dirty gas on the gas pipelines, - said Yevhen Opalatenko.
In the coming days, drafting machines are to be delivered and installed on the construction site. Modernization of aspiration units of tail parts of sintering machines is planned to be completed by the end of this year.
Zaporizhstal has invested UAH 235 million in the modernization project. Modernization will improve working conditions and make air purification from dust much more efficient.

It will be recalled that this project is being implemented within the framework of the Memorandum signed by Zaporizhstal and the Zaporizhia Regional State Administration on October 21. The memorandum aims to reduce the impact on the environment.
In general, the plant has already invested over UAH 1.2 billion in the ecological modernization of the sinter plant - installation of gas cleaning systems for sinter machines №1-6.
Since 2012, Zaporizhstal has spent about UAH 15 billion on eco-modernization.